US3137237A - Pump sealing apparatus - Google Patents

Pump sealing apparatus Download PDF

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Publication number
US3137237A
US3137237A US133167A US13316761A US3137237A US 3137237 A US3137237 A US 3137237A US 133167 A US133167 A US 133167A US 13316761 A US13316761 A US 13316761A US 3137237 A US3137237 A US 3137237A
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Prior art keywords
sealing
pump
impeller
diaphragm
sealing surface
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US133167A
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English (en)
Inventor
Irvin F Zagar
George M Wilfley
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AR Wilfley and Sons Inc
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Wilfley & Sons Inc A
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Priority to US133167A priority Critical patent/US3137237A/en
Priority to GB45398/61A priority patent/GB934311A/en
Priority to DE1962W0031544 priority patent/DE1528884B1/de
Priority to SE3362/62A priority patent/SE311822B/xx
Priority to DK151462AA priority patent/DK117541B/da
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Publication of US3137237A publication Critical patent/US3137237A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/08—Sealings
    • F04D29/10—Shaft sealings
    • F04D29/14—Shaft sealings operative only when pump is inoperative
    • F04D29/146—Shaft sealings operative only when pump is inoperative especially adapted for liquid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/16—Sealings between relatively-moving surfaces
    • F16J15/34—Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member
    • F16J15/36—Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member connected by a diaphragm or bellow to the other member
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S277/00—Seal for a joint or juncture
    • Y10S277/927—Seal including fluid pressure differential feature

Definitions

  • the present invention relates to pump sealing apparatus, and more particularly to centrifugal pumps which are especially adaptedfor pumping Vcorrosive and abrasive materials.
  • a flexible sealing means is employed which normallyprovides a good, mechanical seal'when the pump is not rotating. This is accomplished by providing means which normally urges the sealing meansinto sealing position when the various components of the'pump' are at rest.
  • a flexible diaphragm is employed, the construction of the diaphragm itself being suchthat it normally assumes a sealing position.
  • This iiexible diaphragm includes a sealing ysurface which cooperates'with -a sealing surface supported on the rotatable impeller'shaft.
  • the pressurele'xisting on the impeller side yof thev diaphragm is normally less than atmospheric' Y means for the sealing meansgand when the pump is operated, ⁇ and accordingly the dia- Aphragmgwill be urged in such a direction asto separate ⁇ means for the sealing means;
  • the sealing means may be automatically operated by the pressures acting on the opposite sides thereof, but in certain instances where the sealing means may be of great thickness or where it is made of a material which is not very flexible, or where the operation is under severe pumping conditions, an auxiliary shifting means may be employed.
  • This auxiliary shifting means may assume various forms as hereinafter described, but in each case, the auxiliary shifting means will be interrelated with the rotation of the impeller shaft such that the sealing means Will be in operative sealing position whenthe impeller shaft is at rest, and thesealing means will be automatically shifted to open position upon pre-determined rotation of the impeller shaft.
  • An objectof the present invention is to provide new and novel pump sealing apparatus which provides an effective mechanical seal when the pump is not operating, and yet which eliminates any frictional contact between .the mechanical sealing members when the pumpiis operatmg.
  • Another object of the invention is the provision of pump sealing apparatus wherein the mechanically sealing portions of the sealing means are automatically separated from one another Vupon actuation of the pump.
  • a further object of the invention is to provide auxiliary shifting means for shifting the sealing means in accordance with pre-determined rotation of the impeller shaft of the pump.
  • a still further object of the invention is to provide pump sealing apparatuswhich completely eliminates ⁇ any shifting of the impeller shaft for obtaining the desired end results.
  • Yet another object of the invention is the provision of pump sealing apparatus which is quite simple and inexpensive in construction and yet able in operation.
  • FIG. 1 is a longitudinal section through a portion of a centrifugal pump illustrating the basic sealing arrangement of the present invention
  • FIG. 2 isan enlarged'view of a portion of thel structure shownin FIG. l illustrating the mechanical sealing members separated from one another; t.
  • FIG. V3 is Va sectional view illustrating an auxiliary actuating means for the sealing means
  • FIG. 4 illustrates a further modified form of actuating means for the sealing means
  • FIG.r 5Y illustrates afurther modified form of actuating means for the sealing means
  • FIG. 7 illustrates a further modified ⁇ form ⁇ of actuating FIG. .8 ⁇ illustrates a further modified form of actuating FIG. 9 is a longitudinal section illustrating'a slightly modified form of the'sealingY means along with a still further modified type of actuator means for the sealing means. f
  • FIGS. l and"V 2 theover-all pump housing which is indicated generally by reference numeral 10, this housing consisting of several assemblies which are interconnected with one another to provide the complete assembly for enclosing the various components of the pumping apparatus.
  • the housing includesv a base portion 11 including upwardly extending supporting portions 12 and 13 for supporting varlous portions of the apparatus.
  • a tubular member 15 supports a ball bearing 17 havlng balls 18, an inner race 19, and an outer race 20.
  • This rollerV bearing serves to journal a portion of the impeller shaft 25, the ball bearing being held in place between a shoulder 27 on the impeller shaft and a portion of a collector housing 26.
  • the impeller shaft is drivingly connected to a suitable pump motor in the conventional manner, and a reduced portion 28 of the impeller shaft is also journaled within a ball bearing 30 mounted within a portion 31 of the collector housing 26.
  • the terminal end portion 34 of the impeller shaft is threaded, and an impeller indicated generally by reference numeral 35 is threaded on the outer end 34 of the impeller shaft in a well-known manner.
  • the impeller includes a plurality of conventional pump vanes 37, as Well as a plurality of conventional expeller vanes 38, these expeller vane'sbeing employed for the purpose of producing a hydraulic selal in a well-known manner.
  • the impeller housing is indicated generally by reference numeral 40, and a circumferential laterally extending flange 42 extends forwardly of the impeller and tits within and is spaced from the walls of a groove 43 formed in the impeller housing thereby providing a labyrinth means therewith.
  • a circumferential laterally extending flange 45 extends rearwardly of the impeller and lits within and is spaced from the walls of a groove 46 formed in the impeller housing for providing a labyrinth means therewith.
  • Fluid entering through the inlet bore 50 of the impeller housing is pumped outwardly by pump vanes 37 and then moves out of the pumping apparatus through the discharge outlet 51.
  • Expeller vanes 38 will also tend to pump out any fluid whichmay leak by the labyrinth means dened by flange 45 and groove 46, thereby tending to prevent any liquid from passing toward the rear of the apparatus while the impeller is rotating during its pumping action.
  • the impeller housing includes a relieved portion 55 and anfannular spaceV 56 is provided between the impeller housing and the outer portion of the impeller itself. This permits fluid which may leak by the labyrinth defined by flange 45 and groove 46 to pass into a space indicated by letter A. This space A is defined between the impeller housing and a portion of the sealing means generally indicated by reference numeral 60.
  • Another space B is defined between the sealing means 60 and a portion of the collector housing 26 as well as a portion of a shaft sleeve 62 which is affixed to the impeller shaft.
  • Shaft sleeve 62 has a pair of annular grooves 65 and 66 ⁇ formed in the outer surface thereof, and collector housing 26 has a corresponding pair of annular grooves 68 and 69 formed in the inner surface thereof, it being notedy thatgrooves 68 and 69 are axially aligned with grooves 65 and 66 respectively.
  • K y
  • Sealing means 60 in this example comprises a diaphragm formed of flexible material and may be formed of "various materials such as rubber, Teflon, polyethylene, and in some cases may take the form of a flexible metallic bellows. As shown, the diaphragm is illustrated as formed of a plastic material such as Teflon which has good corrosion and abrasion resistant qualities and further which is suiciently flexible to permit the desired movement thereof during operation.
  • a desirable feature of a plastic sealing means is the fact that it may have a so-called molded memory built into it whereby it will tend to assume the position shown in FIG. 1 to provide a seal, and it will return to this position Whenever the pressures on opposite sides thereof do not force it away from the position shown.
  • a first edge portion 75 of the sealing means is clamped to the impeller housing by means of an annular clamping ring 76 bolted to the impeller housing by a plurality of spaced bolts 77.
  • the opposite edge portions 80 of the sealing means is fxedly clamped to the collector housing 26 by an annular clamping ring 81 held in place by a plurality of spaced bolts 82. It is accordingly evident that the opposite edge portions of the flexible diaphragm comprising the sealing means are rigidly secured to fixed members.
  • the intermediate portion 85 of the diaphragm is substantially U-shaped in cross-sectional configuration, and an annular laterally extending flange portion 86 extends rearwardly therefrom, the outer face of flange portion 86 defining a flat sealing surface.
  • the liat sealing surface formed on flange portion 86 of the sealing means is adapted to engage a cooperating flat sealing surface supported on shaft sleeve 62.
  • an insert 87 is shown as supported on shaft sleeve 62, this insert being formed of a suitable corrosion and abrasion resistant material such as Teon or the like and defining a flat sealing surface which is adapted to engage flush with the at sealing surface on the diaphragm.
  • the sealing means is in operative sealing position, and the pump is at rest.
  • the uid head of the pump will exist in space A, this fluid head normally being substantially greater than atmospheric pressure, which exists in space B, due to its communication with atmosphere through the exhaust outlet means 70. It is therefore clear that a 'greater pressure exists on the impeller side of the diaphragm than on the exhaust outlet side of the diaphragm, and accordingly, the diaphragm will be urged into its closed sealing position by the pressures acting thereon as well as the natural tendency of the diaphragm itself to assume this sealing position.
  • the diaphragm will be moved to its openposition as soon as the pump is up to speed which is a matter of seconds, and accordingly, there is not any appreciable rubbing contact between the sealing surfaces upon starting of the pump.
  • these components are preferably formed of an abrasion and ⁇ corrosion resistant material.
  • the sealing faces of the apparatus are preferably of a suitable material to withstand the slight frictional contact which occurs during operation, and these sealing surfaces may be formed for example of rubber with fiber or fabric, metallic material, ceramic material or plastic material.
  • FIG. 3 of the drawings a modificationis illustrated wherein a solenoid auxiliary actuator is employed for assisting the movement of the diaphragm sealing means.V
  • the components of FIG. 3 which are similar to those shown in FIG. 1 have been given the same reference numerals primed.
  • the diaphragm sealing means 100 is of similar configuration to the diaphragm sealing Vmeans 60 previously discussed, ⁇ and is held in place by retaining rings 101 and 102 bolted to the impeller housing'and collector housing respectively.
  • An annular plate member 105 has the inner portion 106 thereof seated within the intermediate portion of the diaphragm and fitted snugly therewithin.
  • the outer portion of plate 105 is connected with one or more solenoids 103, solenoid 108 as seen in FIG. 3 being mounted upon the impeller housing and including a plunger 110 which is operatively connected with plate 105.
  • Plate y105 is also connected by one or more spring members V112- to the-clamping ring 102 attached to the collector housing 26.
  • the spring 112 is adapted to continuously resiliently urge the plate 105 as seen in FIG. 3 to the right thereby causing the diaphragm to be sealingly seated against the ycooperating sealing surface formed on shaft sleeve 62'.
  • Solenoid 108 is4 electrically connected through a lead 114 to a timing device 115 which is in turn electrically ,y connected with the motor which drives the impeller shaft. y
  • annular Vplate member 125 formedof magnetic material such as iron or the like Vis snugly received within the intermediate portion of the diaphragm,- ⁇ and it will be noted that a laterally extending annular portion 126 at the inner portion ⁇ thereof isreceived within a hollow portion of the laterally extending flange 127 of the diaphragm.
  • a circumferential laterally extending portion 128- is formed on the outer portion of the plate 12S and extends in a direction opposite to the flange portion 126.
  • Flange portion 128 forms themovable core of an electro-magnet indicated by reference numeral 130, the electro-magnet being electrically connected with the driving motor of the pump.
  • a permanent magnet 132 is supported on the shaft sleeve 62', permanent magnet 132 being annular in configuration and normally attracting the portion 126 of plate 125 so as to urge the sealing surfaces into contact with one another.
  • the circuit When the main pump motor is started, the circuit is closed to the electro-magnet 130 which attracts the plate 125 to the left as seen in FIG. 4 thereby opening the sealing means.
  • the electromagnet When the pump motor is shutoff, the electromagnet is de-energized and the permanent magnet 132 urges the plate 125 back to the right as seen in FIG. 4 to cause the sealing surfaces to again be urged into sealing contact with one another.
  • FIG. 5 a further modified actuatingl means is illustrated, wherein the components similar to those of FIG. l have again been given the same reference numerals primed.
  • the flexible sealing diaphragm is retained inposition by a pair of clamping rings 141 and 142.
  • An electro-magnet device 145 is snugly fitted within the central portion of diaphragm 140, and it will be noted that a laterally extending portion 146 of the electro-magnet device extends within a hollowed portion of the laterally extending flange 147 of the diaphragm.
  • the electro-magnet device is electrically connected with the driving motor of the pump.
  • An annular permanent magnet 150 is supported on the shaft sleeve 62 and is in such a position that it will normally attract the magnetic material of the electro- Y magnet device 145 to cause the sealing surfaces to be urged into sealing contact with one another.
  • electro-.magnet device 145 When the main pump motoris started, electro-.magnet device 145 is energized and its polarity is such that it is the same as the permanent magnet 150 thereby'causing a repellent force to occur and thereby separating the Ysealing faces.
  • the iiexible sealing diaphragm is again retained in position by means of a pair of clamping rings l161 and 162.
  • An annular permanent magnet 165 is snugly fitted within the central portion of diaphragm 160, and an electro-magnetic device 167 isl mounted upon the shaft-sleeve 62'.
  • Electro-magnetic device 167 is connected through slip ⁇ rings 170 and 171 to brushes 173 and 174 which are in turn connected through a timing device 175 to the driving motor of the pump.
  • FIG. 7 of the drawings a further modified form of actuating means is illustrated, and again parts similar to those shown in FIG. i l have been given the same reference numerals primed. It will be seen that the rear end portion of the impeller shaft 25 is journaled within a rear bearing 200 disposed within tubular member and a pulley 201 is xed to and rotates with the impeller shaft.
  • a flexible diaphragm seal 204 is retained in position by a pair of clamping rings 205 and 206 and a plate member 208 is snugly tted within the central portion of the ilexible diaphragm.
  • This plate 208 is in turn connected with one or more piston rods 210, the piston rod 210 extending within a hydraulic cylinder 211, the piston rod having a head 212 at the terminal end thereof.
  • a resilient spring 213 is seated against piston head 212 and normally urges the piston head to the right as seen in FIG. 7, thereby causing the flexible diaphragm 204 to be normally seated in sealing relationship.
  • a hydraulic pump 215 is driven through a shaft 216 having a pulley 217 connected to the outer end thereof, pulley 217 being drivingly connected with pulley 201 on the impeller shaft through a drive belt 218.
  • a conduit 220 connects the hydraulic pump with a two-way control valve 221, this valve being suitably electrically or pressure controlled so as to be actuated in accordance with the actuation of the pump motor and impeller shaft.
  • Conduit means 222 connects the control valve with the interior of hydraulic cylinder 211 at the side of the piston head 212 opposite to the side on which the spring bears.
  • a conduit means 224 connects valve 221 with a-reservoir 225 which in turn is connected through conduit means 226 to the hydraulic pump.
  • the hydraulic pump 215 In operation, when the pump is started, the hydraulic pump 215 will be driven along with the impeller shaft.
  • the control valve 221 is regulated to open after the eX- peller vanes of the main pump have reached a speed so that there is substantially no liquid on the impeller side of the sealing means which could leak past the sealing surfaces.
  • control valve is then opened, and hydraulic pressure is applied through conduit 222 to the cylinder 213 forcing the piston within the cylinder to the left as seen in FIG. 7 and moving the sealing surfaces away from one another.
  • the spring 213 then rapidly moves plate 208 and the diaphragm to the right as seen in FIG. 7 to bring the sealing surfaces into contact with one another.
  • FIG. 8 a pneumatic actuating system is illustrated which in many respects is quite similar to the hydraulic system shown in FIG. 7.
  • portions similar to parts shown in FIG. l are given the same reference numerals primed. 1 n
  • the diaphragm 204 is identical to the diaphragm 204 shown in FIG. 7, and the plate means 208 as well as the cylinder actuating means 211' are identical with the corresponding components 208 and 211 shown in FIG. 7.
  • the principal distinction of the structure shownin FIG. 8 is the fact that air pressure may be utilized rather than hydraulic pressure.
  • Air compressor 230 is driven through a pulley 231 which is drivingly connected by belt 232 with a pulley 233 fixed for rotation with the 'impellershaft Air compressor 230 is connected through conduit 235 to an air storage tank v236 which is in turn connected with a conduit 237 which may be connected with a control valve 240.
  • the control valve is connected through conduit 241 to the cylinder 211'.
  • a conduit 243 may be connected with any external source of air pressure or may be connected with conduit 237 as desired.
  • a conduit 245 has an open end 246 which forms arventvto atmosphere.
  • control valve 240 When the pump motor is started, control valve 240 is actuated after a suitable time delay to admit air pressure to cylinder 211? which moves the sealing surfaces out of contact with one another. When the pump is turned off, control valve 240 is shifted to connect conduit 241 to conduit 245 to vent the cylinder 211 to atmosphere whereupon the spring means within the cylinder urges the plate 208' to the right and causes the sealing surfaces to once again come into contact with one another.
  • an impeller shaft 250 has an impeller 251 threaded on the outer end thereof, the impeller including pump vanes 252 and expeller vanes 253.
  • a housing for the pump is illustrated generally by reference numeral 255.
  • a shaft sleeve 260 is mounted upon the impeller shaft and a collector housing 261 is bolted to the main pump housing.
  • the shaft sleeve includes an annular groove 263 formed on the outer surface thereof and collector housing 261 includes a pair of annular grooves 264 and 265 formedon the inner surface thereof.
  • the grooves 263, 264 and 265 conduct liquid to the exhaust outlet 268 which serves to carry liquid away from the pump as aforedescribed.
  • the sealing means in this example is illustrated by reference numeral 270 and may comprise a flexible metallic bellows member, the opposite ends of the metallic bellows being rigidly clamped in position by retainer rings 272 and 273 ⁇ which are bolted to various portions of the main pump housing.
  • a first sealing surface is formed by the rounded outer portion of a seal insert 275 which is mounted within the shaft sleeve 260, insert 275 being formed of a suitable plastic material or the like.
  • An annular member 277 of substantially J-shaped cross-sectional configuration is affixed tothe inner surface of the central portion of the metallic bellows 270 and forms a flat sealing surface 278 which is adapted to engage the insert 275.
  • An annular plate 280 is snugly fitted within the intermediate portion of the bellows 270 and is connected with one or more push rods 281.
  • Push rod 281 extends through suitable openings in the pump housing and collector housing members, and the outer end of the push rod is connected through clamping members 282 and 283 to a thrust bearing 284, the inner race of which is mounted on a shiftable sleeve 285.
  • the inner race is held imposition by'a member 286, and 'a resilient spring 288 bears against member 286 for normally urging the bearing and sleeve to the right as seen in FIG. 9.
  • Sleeve 285 includes a radially extending ilange 290.
  • a plurality of speedcontrolmembers 292 are pivotally mounted about axes 293 on members 294 which are fixed to the impeller shaft.
  • Weights 295 are formedat one end of the members 292 and cam surfaces 297 are formed at the opposite ends thereof.
  • the mechanical sealing portions are automatically separated upon actuation of the pump, and in some instances, an. auxiliary shifting means is provided for assisting in the opening and closing of the sealing means.
  • the arrangement of the present invention completely eliminates the necessity of shifting the impeller shaft as has been done in prior art.
  • the apparatus is quite simple and inexpensive in.. construction and yet is quite efficient and reliable in operation.
  • Pump sealing apparatus comprising a pump having a rotatable means including an impeller, exhaust means in communication with atmosphere, and sealing means for preventing liquid flow between said impeller and .Said exhaudt means, said sealing meansv including a flexible movable intermediate portion, means normally retaining said sealing means in operative sealing position with said intermediate portion' in engagement wth a part of said rotatable means, and said pump including means for reducing pressure on the impeller side of the sealing means below the pressure on the other side of the sealing means to move said sealing means completely out of engagement with said rotatable means.
  • Pump sealing apparatus including a rotatable'impeller and exhaust means spaced from said impeller and in communication with atmosphere for venting liquid l from saidv impeller during certain ⁇ phases of operation of the pump, and sealing means having certain spaced portions thereof mounted in fixed relationship relative to the pump and including a free intermediate portion for engaging a rotatable portion of the pump intermediate said impeller andsaid exhaust means, said intermediate portion of the sealing means being flexible and freely movable, means for retaining the intermediate portion of the sealing means 'in sealing relationship relative to the cooperating portion of the pump, and means for reducing the pressure on the impeller side of the sealing means below atmospheric pressure to move said intermediate portion completely out of. sealing relationship relative tothe cooperating portion of the pump.
  • Pump sealing apparatus including an impeller having pump vanes and expellerv vanes, said expeller vanes p being adapted to produce a 'hydraulic seal during rotation of the pump, said pump including exhaust meansin communication with atmosphere for exhausting liquid from the pump, said exhaust means being spaced from said expeller vanes, said pump including a sealing sur- Vface intermediatesaid expeller vanes and said exhaust means, sealing means including opposite end portions fixed relative to said pump and including a free flexible intermediate" portion forengaging said sealing surface,l
  • sealing means comprises a diaphragm formed o'f corrosion and abrasion resistant material.
  • Pump sealing apparatus' comprising a ⁇ pump vincluding a'pump housing, an impeller shaft rotatably supportedV within said housing, an impeller mounted on said impeller shaft and including pump vanes and expeller vanes, said expeller vanes producing a hydraulic seal during rotation of the impeller shaft, a sleeve secured to said shaft and including a sealing surface thereon, a'sealing means comprising a flexible diaphragm means fixed with respect to said pump, said sealing means including a sealing surface formed on an intermediate portion thereof and engaging said first-mentioned sealing surface, means normally retaining said two sealing surfaces in contact with one another, said pump including exhaust means in communication with atmosphere for venting liquid from the pump, said exhaust means being in communication with one side of said sealing means, theV opposite side of said sealing means being in communication with said expeller vanes, whereby upon rotation of the pump the expeller vanes reduce the pressure below atmospheric pressure on said other side of the sealing means causing the intermediate portion of the sealing means to be moved to cause the sealing surfaces toy move away
  • Pump sealing apparatus including a pump housing, V
  • saidv operating means including at least one rod member movable longitudinally of said impeller shaft, and means for moving said last-mentioned member, resilient means normally urging said rod member in one direction so as to urge said sealing surfaces into engagement with one another, and means for moving said rod member in the opposite direction, said last-mentioned means being connected to and responsive to rotation of said impeller shaft for moving said sealing surfaces away from one another.
  • Pump sealing apparatus comprising a pump housing and an impeller shaft rotatably supported in said pump housing, an impeller mounted at one end of said impeller shaft, exhaust means in communication withv atmosphere for'venting the pump, a sleeve affixed to said impeller shaft and having a first sealing surface formed thereon, flexible sealing means having a second sealing surface formed ⁇ thereon for engagingV said first sealing surface, and actuating means connected with an intermediate'portion of said flexible sealing means, said actuating means including a fixed hydraulic cylinder, a piston slidably mounted within said cylinder and operatively connected with the intermediate portion of said sealing means, resilient means engaging said piston and urging said resilient sealing meanslin a direction to cause engagement of said first and second sealing surfaces, a source of hydraulic pressure, conduit means providingr communication between sa'id source of hydraulic pressure and said cylinder, and a control valve means connected in said conduit means for controlling the flow of hydraulic fluidto said cylinder.
  • Pump sealing apparatus comprising. a pump housing and ⁇ an impeller shaft rotatably supportedin said pump housing, an impeller mounted at one end of said impeller shaft, exhaust means in communication with atmosphere for venting the pump, a sleeve afiixed to said impeller shaftand having a first sealingsurface formed thereon, flexible sealing means'having a second sealing surface formedl thereon for engagingV said first sealing surface, and actuating means connected with an intermediate portionof said flexible sealing means, said actuating means including a fixed uid cylinder, a piston slidably mounted within said cylinder and opveratively connected with the intermediate portion of said sealing means, resilient means engaging said piston and urging said resilient sealing means in a direction to cause engagement of said first and second sealing surfaces, a source of fiuid pressure, conduit means connecting said source of pressure to said cylinder, control valve means connected in said conduit means, and vent conduit means in communication with atmosphere connected with said control valve means, whereby said cylinder may be connected
  • Pump sealing' apparatus including a pump housing, an impeller shaft rotatably supported within said housing, an impeller operatively connected with said impeller shaft, exhaust means in communication with atmosphere for venting the pump, a sleeve affixed to said impeller shaft and supporting a first sealing surface, a sealing means comprising a flexible body having a second sealing surface supported thereon, and operating means for moving said second sealing surface toward and away from said first sealing surface mounted on said sleeve, said operating means including a solenoid operatively connected with said sealing means, a motor for driving said impeller shaft, said solenoid being electrically connected with said motor through a timing device so that when the motor is actuated the solenoid will be energized to move said second sealing surface away from said first sealing surface after a suitable time delay, and resilient means connected with said sealing means normally urging said second sealing surface toward said first sealing surface.
  • Pump sealing apparatus including a pump housing, an impeller shaft rotatably supported within said housing, an impeller operatively connected with said impeller shaft, exhaust means in communication with atmosphere for venting the pump, a sleeve afiixed to said impeller shaft and supporting a first sealing surface, a sealing means comprising a fiexible body having a second sealing surface supported thereon, and operating means for moving said second sealing surface toward and away from said first sealing surface mounted on said sleeve, said operating means comprising a plate member operatively connected with an intermediate portion of said sealing means and being formed of magnetic material, a permanent magnet means mounted on said sleeve normally attracting said plate toward said sleeve to cause engagement of said first and second sealing surfaces, and electro-magnet means operatively associated with said plate means, a motor for driving'said impeller shaft, said electro-magnet means being electrically connected with said motor such that when the motor is actuated the electro-magnet is energized and will urge said plate means in a direction
  • Pump sealing apparatus including a pump housing, an impeller shaft rotatably supported within said housing, an impeller operatively connected with said impeller shaft, exhaust means in communication with atmosphere for venting the pump, a sleeve affixed to said impeller shaft and supporting a first sealing surface, a sealing means comprising a fiexible body having a second sealing surface supported thereon, and operating means for moving said second sealing surface toward and away from said first sealing surface mountedonsaid sleeve, said oper- ⁇ ating means comprising an electro-magnetic means operatively connected with an intermediateA portion of said sealing means, a permanent magnet supported by said sleeve, a motor drivingly connected to said impeller shaft, said electro-magnetic means being electrically connected to said motor so that when the motor is actuated, the electro-magnetic means is energized, the polarity of the electro-magnetic means being the same as that of the permanent magnet causing a repellingvforce to be produced urging said second sealing surface away from said
  • Pump sealing apparatus including a pump housing, an impeller shaft rotatably supported within said housing, an impeller operatively connected with said impeller shaft, exhaust means in communication with atmosphere for venting the pump, a sleeve affixed to said impeller shaft and supporting a first sealing surface, a sealing means comprising a fiexible body having a second sealing surface supported thereon, and operating means for -moving said second sealing surface toward and away from said first sealing surface mounted on said sleeve, said operating means comprising a permanent magnet means operatively connected with an intermediate .portion of said sealing means, and an electro-magnetic means supported on said sleeve, a motor drivingly connected with said impeller shaft, said electro-magnetic device being connected to said motor through a timing device, brushes and slip rings so that when the motor is actuated the electro-magnetic device is energized, the polarity of the electro-magnetic device being the same as the permanent magnet to produce a repelling force urging said second sealing surface away
  • Pump sealing apparatus comprising a pump including a pump housing, an impeller shaft rotatably supported within said pump housing, an impeller at the end portion of said impeller shaft, means supported on said impeller shaft defining a first annular sealing surface, said pump including exhaust means in communication with atmosphere, said annular sealing surface being disposed between said impeller and said exhaust means, and sealing means comprising a generally annularly extending flexible diaphragm, the opposite edge portions of said diaphragm being clamped in fixed position, the intermediate portion of said diaphragm being free and defining a second annular sealing surface adapted to engage said first annular sealing surface, and means normally urging said second sealing surface into engagement with said first sealing surface, and means for reducing the pressure on the impeller side of the sealing means below atmospheric pressure to move said second annular sealing surface completely out of engagement with said first annular sealing surface.
  • Sealing means for use in sealing a pump comprising a generally annularly extending diaphragm formed of flexible material, the opposite edges of said diaphragm being adapted to be clamped in fixed relationship, the intermediate portion of said diaphragm being unperforated and continuous to prevent liquid flow therethrough and being substantially U-shaped in cross-sectional configuration and an annular laterally extending ange portion formed on said intermediate portion and defining an annular sealing surface adapted to engage acooperating annular sealing surface formed on a pump.
  • Pump sealing apparatus comprising a pump including a pump housing, an impeller shaft rotatably supported withinsaid housing, an impeller mounted on said impeller shaft and including pump vanes and expeller vanes, said expeller vanes producing a hydraulic seal during rotation of the impeller shaft, a sleeve secured to said shaft and including a sealing sur/face thereon, a'sealing means comprising a flexible diaphragm means fixed with respect to said pump, said sealing means including a sealing surface formed on an intermediate portion thereof and engaging saidrfirst-mentioned sealing surface, means normally retaining said two sealing surfaces in contact with one another, said pump includingn exhaust means in communication with atmosphere for venting liquid from the pump, said exhaust means being vin communication with one side of'saidrsealing means, the opposite side of said sealing meansbeing in communication with said expeller vanes, whereby upon rotation of Ithe pump the expeller vanes reduce the pressure below atmospheric pressure on said other side of the sealing means causing the intermediate portion of the sealing means to be moved to cause the sealing surfaces
  • ing surface is formed on an annular laterally extending ange portion to thereby define an annular sealing surface.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Supporting Of Heads In Record-Carrier Devices (AREA)
US133167A 1961-08-22 1961-08-22 Pump sealing apparatus Expired - Lifetime US3137237A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
US133167A US3137237A (en) 1961-08-22 1961-08-22 Pump sealing apparatus
GB45398/61A GB934311A (en) 1961-08-22 1961-12-19 Pump sealing apparatus
DE1962W0031544 DE1528884B1 (de) 1961-08-22 1962-01-25 Stillstandsdichtung für Kreiselpumpen
SE3362/62A SE311822B (da) 1961-08-22 1962-03-27
DK151462AA DK117541B (da) 1961-08-22 1962-04-03 Akseltætning til pumper, især centrifugalpumper.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US133167A US3137237A (en) 1961-08-22 1961-08-22 Pump sealing apparatus

Publications (1)

Publication Number Publication Date
US3137237A true US3137237A (en) 1964-06-16

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US133167A Expired - Lifetime US3137237A (en) 1961-08-22 1961-08-22 Pump sealing apparatus

Country Status (5)

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US (1) US3137237A (da)
DE (1) DE1528884B1 (da)
DK (1) DK117541B (da)
GB (1) GB934311A (da)
SE (1) SE311822B (da)

Cited By (29)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3366068A (en) * 1965-09-13 1968-01-30 Smedegaard As Fluid circulation pump
US3416455A (en) * 1967-03-15 1968-12-17 Worthington Corp Hydraulically actuated sealing means for rotating equipment
US3612549A (en) * 1970-05-25 1971-10-12 Melvin H Berkowitz Pressure seal
US3869135A (en) * 1973-03-27 1975-03-04 Ksb Kernkraftwerkspumen Gmbh Controlled leakage face type shaft seal
US3931976A (en) * 1973-10-19 1976-01-13 Societe Nationale D'etude Et De Construction De Moteurs D'aviation Magnetically controlled obturator
US4226427A (en) * 1978-01-12 1980-10-07 Societe Nationale D'etude Et De Construction De Moteurs D'aviation (S.N.E.C.M.A.) Magnetic-control closure system
US4242039A (en) * 1977-11-22 1980-12-30 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Pump impeller seals with spiral grooves
US4385768A (en) * 1979-07-19 1983-05-31 Rotoflow Corporation, Inc. Shaft mounting device and method
US4523896A (en) * 1982-06-04 1985-06-18 Creusot-Loire Centrifugal compressor
US4688990A (en) * 1983-08-30 1987-08-25 Borg-Warner Corporation Pump construction
US4729724A (en) * 1985-09-30 1988-03-08 Kraftwerk Union Aktiengesellschaft Blower for propelling a continuous gas stream with inflatable gas seals
US4915579A (en) * 1988-08-15 1990-04-10 A. R. Wilfley & Sons, Inc. Pump sealing apparatus
US4936744A (en) * 1989-07-25 1990-06-26 Goulds Pumps, Incorporated Centrifugal pump
US5013051A (en) * 1985-12-20 1991-05-07 Eg&G Sealol, Inc. Single component seal
US5071316A (en) * 1991-02-11 1991-12-10 General Motors Corporation Combination coolant pump drip collection, belt tensioner
US5102308A (en) * 1990-09-14 1992-04-07 Thomas Bordelon Axial flow pump
US5114310A (en) * 1990-09-07 1992-05-19 A. Ahlstrom Corporation Centrifugal pump with sealing means
US5261786A (en) * 1991-03-05 1993-11-16 A. R. Wilfley & Sons, Inc. Actuator mechanism for pump sealing apparatus
US5427500A (en) * 1994-03-15 1995-06-27 The Weir Group Plc Slurry pump seal system
US5492340A (en) * 1994-05-20 1996-02-20 General Motors Corporation Floating disk seal assembly
US5667356A (en) * 1996-05-06 1997-09-16 A. R. Wilfley & Sons, Inc. Acid/slurry governor seal assembly for centrifugal pumps
US6010318A (en) * 1999-06-23 2000-01-04 Li; Wen-Sheng Electric fan with lubricating oil leakage preventive arrangement
US6224322B1 (en) 1998-11-16 2001-05-01 A. R. Wilfley & Sons, Inc. Seal assembly for centrifugal pumps with barrier ring
EP1344943A3 (en) * 2002-03-15 2004-12-01 WORLD CHEMICAL CO., Ltd. Liquid pump and sealing mechanism
US20070164516A1 (en) * 2006-01-17 2007-07-19 Johnson Crushers International Seal assembly for vibrating screen
US7857320B1 (en) * 2009-06-03 2010-12-28 Chang Ming S Bearing isolator seal with floating ring
US20150330396A1 (en) * 2012-07-10 2015-11-19 Borgwarner Inc. Exhaust-gas turbocharger
US20200072402A1 (en) * 2018-08-31 2020-03-05 United Technologies Corporation Conduit boot with bushing
US20240102479A1 (en) * 2021-02-12 2024-03-28 Mitsubishi Heavy Industries Engine & Turbocharger, Ltd. Electric centrifugal compressor

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2231373B (en) * 1989-05-03 1993-04-07 Crane John Uk Ltd Seals
CN107882768B (zh) * 2017-10-27 2019-05-31 江苏大学 一种动静耦合密封控制方法及其装置

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US1085326A (en) * 1912-09-19 1914-01-27 Gen Electric Shaft-packing.
GB500853A (en) * 1937-07-26 1939-02-16 Warman Charles Harold Improvements in centrifugal pumps
DE1037858B (de) * 1955-10-06 1958-08-28 Klaus Maschinen Und Appbau F Wellenspaltabdichtung bei Kreiselpumpen

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DE719353C (de) * 1940-03-31 1942-04-04 Wilhelm Beck Dipl Ing Wellenspaltdichtung fuer stopfbuechslose Kreiselpumpen
US2620207A (en) * 1949-07-19 1952-12-02 Wilfley & Sons Inc A Glandless seal for centrifugal pumps
US2698584A (en) * 1949-08-13 1955-01-04 Stelzer William Centrifugal pump
US2660487A (en) * 1951-05-31 1953-11-24 A R Wilfiey And Sons Inc Centrifugal pump bearing seal
DE964009C (de) * 1954-07-31 1957-05-16 Licentia Gmbh Abhebbare Dichtung
NL201374A (da) * 1954-10-21
DE1753848U (de) * 1957-08-08 1957-10-10 Henschel & Sohn Gmbh Fluessigkeitsabdichtung fuer umlaufende welle.

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1085326A (en) * 1912-09-19 1914-01-27 Gen Electric Shaft-packing.
GB500853A (en) * 1937-07-26 1939-02-16 Warman Charles Harold Improvements in centrifugal pumps
DE1037858B (de) * 1955-10-06 1958-08-28 Klaus Maschinen Und Appbau F Wellenspaltabdichtung bei Kreiselpumpen

Cited By (33)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3366068A (en) * 1965-09-13 1968-01-30 Smedegaard As Fluid circulation pump
US3416455A (en) * 1967-03-15 1968-12-17 Worthington Corp Hydraulically actuated sealing means for rotating equipment
US3612549A (en) * 1970-05-25 1971-10-12 Melvin H Berkowitz Pressure seal
US3869135A (en) * 1973-03-27 1975-03-04 Ksb Kernkraftwerkspumen Gmbh Controlled leakage face type shaft seal
US3931976A (en) * 1973-10-19 1976-01-13 Societe Nationale D'etude Et De Construction De Moteurs D'aviation Magnetically controlled obturator
US4242039A (en) * 1977-11-22 1980-12-30 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Pump impeller seals with spiral grooves
US4226427A (en) * 1978-01-12 1980-10-07 Societe Nationale D'etude Et De Construction De Moteurs D'aviation (S.N.E.C.M.A.) Magnetic-control closure system
US4385768A (en) * 1979-07-19 1983-05-31 Rotoflow Corporation, Inc. Shaft mounting device and method
US4523896A (en) * 1982-06-04 1985-06-18 Creusot-Loire Centrifugal compressor
US4688990A (en) * 1983-08-30 1987-08-25 Borg-Warner Corporation Pump construction
US4729724A (en) * 1985-09-30 1988-03-08 Kraftwerk Union Aktiengesellschaft Blower for propelling a continuous gas stream with inflatable gas seals
US5013051A (en) * 1985-12-20 1991-05-07 Eg&G Sealol, Inc. Single component seal
US4915579A (en) * 1988-08-15 1990-04-10 A. R. Wilfley & Sons, Inc. Pump sealing apparatus
AU609368B2 (en) * 1988-08-15 1991-04-26 A. R. Wilfley & Sons, Inc. Pump sealing apparatus
US4936744A (en) * 1989-07-25 1990-06-26 Goulds Pumps, Incorporated Centrifugal pump
US5114310A (en) * 1990-09-07 1992-05-19 A. Ahlstrom Corporation Centrifugal pump with sealing means
US5102308A (en) * 1990-09-14 1992-04-07 Thomas Bordelon Axial flow pump
US5071316A (en) * 1991-02-11 1991-12-10 General Motors Corporation Combination coolant pump drip collection, belt tensioner
US5261786A (en) * 1991-03-05 1993-11-16 A. R. Wilfley & Sons, Inc. Actuator mechanism for pump sealing apparatus
US5427500A (en) * 1994-03-15 1995-06-27 The Weir Group Plc Slurry pump seal system
US5492340A (en) * 1994-05-20 1996-02-20 General Motors Corporation Floating disk seal assembly
US5667356A (en) * 1996-05-06 1997-09-16 A. R. Wilfley & Sons, Inc. Acid/slurry governor seal assembly for centrifugal pumps
US6224322B1 (en) 1998-11-16 2001-05-01 A. R. Wilfley & Sons, Inc. Seal assembly for centrifugal pumps with barrier ring
US6010318A (en) * 1999-06-23 2000-01-04 Li; Wen-Sheng Electric fan with lubricating oil leakage preventive arrangement
US6887048B2 (en) 2002-03-15 2005-05-03 World Chemical Co, Ltd. Liquid pump and sealing mechanism
EP1344943A3 (en) * 2002-03-15 2004-12-01 WORLD CHEMICAL CO., Ltd. Liquid pump and sealing mechanism
US20070164516A1 (en) * 2006-01-17 2007-07-19 Johnson Crushers International Seal assembly for vibrating screen
US7857320B1 (en) * 2009-06-03 2010-12-28 Chang Ming S Bearing isolator seal with floating ring
US20150330396A1 (en) * 2012-07-10 2015-11-19 Borgwarner Inc. Exhaust-gas turbocharger
US11428231B2 (en) * 2012-07-10 2022-08-30 Borgwarner Inc. Exhaust-gas turbocharger
US20200072402A1 (en) * 2018-08-31 2020-03-05 United Technologies Corporation Conduit boot with bushing
US10746338B2 (en) * 2018-08-31 2020-08-18 United Technologies Corporation Conduit boot with bushing
US20240102479A1 (en) * 2021-02-12 2024-03-28 Mitsubishi Heavy Industries Engine & Turbocharger, Ltd. Electric centrifugal compressor

Also Published As

Publication number Publication date
DE1528884B1 (de) 1971-07-15
DK117541B (da) 1970-05-04
GB934311A (en) 1963-08-14
SE311822B (da) 1969-06-23

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