EP0882873B1 - Pompe à piston - Google Patents

Pompe à piston Download PDF

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Publication number
EP0882873B1
EP0882873B1 EP97108943A EP97108943A EP0882873B1 EP 0882873 B1 EP0882873 B1 EP 0882873B1 EP 97108943 A EP97108943 A EP 97108943A EP 97108943 A EP97108943 A EP 97108943A EP 0882873 B1 EP0882873 B1 EP 0882873B1
Authority
EP
European Patent Office
Prior art keywords
valve
inlet
piston
piston pump
pump according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP97108943A
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German (de)
English (en)
Other versions
EP0882873A1 (fr
Inventor
Thomas Handtmann
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to DE59709502T priority Critical patent/DE59709502D1/de
Priority to EP97108943A priority patent/EP0882873B1/fr
Priority to US09/087,217 priority patent/US6168398B1/en
Priority to JP10154121A priority patent/JPH1150956A/ja
Publication of EP0882873A1 publication Critical patent/EP0882873A1/fr
Application granted granted Critical
Publication of EP0882873B1 publication Critical patent/EP0882873B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B7/00—Piston machines or pumps characterised by having positively-driven valving
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L3/00—Lift-valve, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces; Parts or accessories thereof
    • F01L3/08—Valves guides; Sealing of valve stem, e.g. sealing by lubricant
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L3/00—Lift-valve, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces; Parts or accessories thereof
    • F01L3/20—Shapes or constructions of valve members, not provided for in preceding subgroups of this group
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B15/00—Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts
    • F04B15/02—Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts the fluids being viscous or non-homogeneous
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/10—Valves; Arrangement of valves
    • F04B53/1097—Valves; Arrangement of valves with means for lifting the closure member for pump cleaning purposes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/16—Casings; Cylinders; Cylinder liners or heads; Fluid connections
    • F04B53/162—Adaptations of cylinders
    • F04B53/164—Stoffing boxes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L3/00—Lift-valve, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces; Parts or accessories thereof
    • F01L2003/25—Valve configurations in relation to engine
    • F01L2003/258—Valve configurations in relation to engine opening away from cylinder
    • 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
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/4238—With cleaner, lubrication added to fluid or liquid sealing at valve interface
    • Y10T137/4245—Cleaning or steam sterilizing
    • Y10T137/4259—With separate material addition

Definitions

  • the present invention relates to a piston pump with the feature and the preamble of claim 1.
  • a piston pump is from GB-A-2 212 857 known.
  • the present invention particularly relates to a piston pump for conveying viscous or medium viscous, i.e., just flowable fluids.
  • viscous or medium-viscosity fluids for example, in the cosmetics industry or Pharmacy in the form of oils or creams, in waste disposal technology in the form of mushy media or sewage sludge and especially in the food industry promoted and dosed.
  • a piston pump for conveying viscous or medium viscous, i.e., just flowable fluids.
  • viscous or medium-viscosity fluids for example, in the cosmetics industry or Pharmacy in the form of oils or creams, in waste disposal technology in the form of mushy media or sewage sludge and especially in the food industry promoted and dosed.
  • solid components such as for example yoghurt masses with fruits, yeast masses and gels and sausage masses or sausage meat.
  • Fluids are rotating positive displacement pumps (e.g. vane cells and Rotary lobe pumps).
  • rotating positive displacement pumps e.g. vane cells and Rotary lobe pumps
  • these pumps have an inevitable Gap that causes unwanted leakage.
  • Rotary positive displacement pumps are generally not suitable for pumping fluids, which have solids. Soft solids, such as pieces of fruit, are mechanically stressed and crushed in the rotating positive displacement pumps
  • rotating positive displacement pumps are very difficult to clean, especially at the transition from the conveyor to the drive shaft.
  • Diaphragm pumps for conveying and dosing viscous or highly viscous fluids.
  • the stroke of these pumps is limited, so that for one sufficient flow rate, a relatively large membrane area must be selected, which in turn leads to increased forces acting on the drive unit of the pump.
  • the membrane is fatigued due to the permanent cyclical stress, so that cracks can form.
  • diaphragm pumps dead spaces in the area of the clamping of the membrane. Hinder these dead spaces cleaning the pump.
  • piston pumps are known in the prior art to cause viscous flow promote or dose.
  • Piston pumps of this type have at least one inlet valve and at least one exhaust valve, the valves being globe valves. each the valve is coupled to a control and drive device. This tax and Drive device is necessary in order to generate the high closing forces that lead to Displacing the sometimes highly viscous liquid from the valve area and possibly sufficient for local cutting of solid components of the mass to be conveyed.
  • the globe valves can be controlled mechanically or magnetically.
  • a piston pump with a working space is known at the head end opposite sides of an inlet and an outlet valve are arranged.
  • the Intake valve is held in its closed position by a seat against which the inlet valve rests with its valve surface facing away from the working space. To open the inlet valve from this closed position on the work area moved there.
  • the design of the inlet valve has the advantage that the valve through the when expelling the fluid internal pressure in the work area against the seat is pressed and thus securely closes the work area.
  • the previously known Piston pump have a valve chamber for the inlet valve, in which the inlet valve be moved into its open position in its closed position can, without colliding with the piston, which is usually when opening the intake valve in the area of its top dead center at the level of the valves.
  • a valve chamber is also provided for the outlet valve in the known piston pump, in which the outlet valve is received in the closed position in such a way that a frusto-conical valve part of the exhaust valve does not collide with the piston.
  • the valve spaces of the inlet and outlet valve prevent an almost complete Drain the trapped by the piston, valves and cylinder Space because there is a residual volume of mass to be conveyed even in the valve spaces remains when the piston is at its top dead center on one of the cylinders covering cover on the front of the work area. Because the piston can only paint over the work area, but not the valve areas.
  • the present invention is based on the technical problem of a piston pump to create that is easy to clean and has as few dead spaces as possible.
  • the piston pump according to the invention has at least one surrounded by a cylinder Working space that can be changed by a piston arranged in the cylinder is, and has at least one inlet valve and at least one outlet valve.
  • the valves are designed as lift valves and with a control and drive device controllable and drivable.
  • the valve surface facing the working area in the closed position the valve merges into the inner surface of the work area without a step.
  • this Design according to the invention are the inner walls of the work space closed valves completely flat. There are therefore no paragraphs in the space enclosed by the piston, the valves and the cylinder.
  • the valves are preferably on the front side the work area.
  • the Piston at its top dead center the end face of the work area almost touch.
  • a Inward opening inlet valve can be provided, since the piston with insertion the filling phase is moved down and at the same time frees up a space in which the opening valve can be moved.
  • the Piston surface is convex and the working area on its face from a concave dome, the inner surface of which is partially closed by the valves is formed. Due to the convex design of the piston surface with a corresponding The concave design of the front of the work area will be as possible complete expulsion of the mass to be promoted improved. Furthermore, can the curvature of the piston surface to the curvature of the work area concave dome can be adjusted that with a reduction of the Working space through the piston first in the area of the inlet valve Mass is pushed towards the exhaust valve and then that in the area remaining mass of the exhaust valve almost completely out of the work area is promoted.
  • the piston pump according to the invention is the valve surface of the inlet and / or outlet valve facing away from the working space convex.
  • each one concave recess for receiving the respective valve in its open Have position the between the valve surface facing away from the work area and the dead space remaining in the wall of the inlet and outlet channels is minimized. It the result is a piston pump, the inlet and outlet channels of which are easy in the same way cleaning is like the work area. There are dead spaces in which mass settles can be reduced to a minimum, a change from one batch to the next Batch take place without essentially mixing the two Batches is produced. Due to the design according to the invention is almost the total volume of the mass in the mass flow located in the piston pump and is promoted by the operation of the piston pump. The smallest possible Dead space arises when the recess and the one facing away from the work space Valve surface have identical curvatures.
  • valve surface facing away from the work area is more curved than the concave Recess of the inlet and outlet channels. This will separate between the valve and the each wall of the inlet and outlet channel formed a wedge-shaped slot, which opens to the respective inlet and outlet channel. Through this wedge-shaped slot becomes the mass behind the valve when the respective valve moves directed into its open position from the concave recess of the respective Inlet and outlet channels pressed out.
  • the inlet or outlet channel goes in the open position of the or each valve in the working room facing Valve area without heel over. This will in the open position of each Valves created an inlet or outlet channel, which has flat walls and the There are no projections on which the mass to be conveyed can adhere.
  • the peripheral surface of the intake and exhaust valve is at least partially on a Wall of the inlet and outlet channel.
  • valves in a guide are guided, the openings to the inlet and outlet channels each with a first Lip seal is provided.
  • the mass adhering to the respective valve rod is at Retracting the valves scraped into the guide from the lip seal and remains in the inlet and outlet channels.
  • a corresponding effect can be found on the page of the piston can be achieved if the piston on its Edge has a lip seal. Because the respective lip seals on the one hand directly at the opening to the inlet or outlet channel and on the other hand directly are missing on the edge of the piston that closes the working space Columns in which the mass to be conveyed can settle.
  • the piston pump according to the invention comprise a wash chamber that surrounds a portion of each valve and that between the first and a second lip seal is formed.
  • the wash cabinet is opposite the distal end of the valve rod that is connected to the control and drive device interacts, seals.
  • each inlet valve in its closed position by a Locking device can be fixed.
  • This locking device causes the closing forces, which correspond to the pressure acting on the outlet valve when expelling the Mass from the work area not through the control and drive device for that Inlet valve are applied.
  • bolt locks can be used as the locking device or locking devices. This can be done through a separate Control and drive device are controlled and driven. But is conceivable also that the locking device mechanically with the control and drive device is coupled for the respective inlet valve. If the inlet valve by a Piston-driving crankshaft, driven and controlled, can be the locking device also be mechanically coupled to the crankshaft. By such Design, it is possible to control the movement of the valves and the locking device synchronize in a simple way.
  • the control and drive device for the globe valves can be controlled by a hydraulic cylinder be formed.
  • the hydraulic Cylinders can be controlled independently.
  • the valves can be controlled mechanically. It is possible to use any valve via a separate motor, for example one on the motor shaft arranged cam cooperates with the valve to control.
  • One on top of the other coordinated movement of the piston and the input or Exhaust valves can be effected in a simple manner in that the valves are mechanical are coupled to the crankshaft driving the piston. Prefers this is achieved via cam gears, which have additional levers with the crankshaft can be connected.
  • a part of a conveyor for sausage mass is shown, the essential Components of an embodiment of the piston pump according to the invention includes.
  • the piston pump has three pistons 1, each in a cylinder 2 are included.
  • Each cylinder 2 is on one end face by a concave Dome 3 completed.
  • the dome 3 has an inlet opening 5a 1, which is closed by an inlet valve 6a in the illustration according to FIG.
  • the dome 3 has an outlet opening 5b through an outlet valve 6b can be closed.
  • the outlet valve 6b is in its open position is shown.
  • each working space 4 communicates with each piston 1 via an inlet channel 7a with a funnel 8 for receiving the to be conveyed Dimensions.
  • Each outlet duct 7b to each work space 4 opens into a collecting channel 9, which has an opening, not shown has, through which the mass pumped and metered by the piston pump for forwarding to a processing machine, e.g. Wurstdosiermaschine is promoted.
  • FIG. 2 Details of the conveyor shown in FIG. 1 are shown in FIG. 2 take a longitudinal section through the conveyor along the line II-II according the representation in Fig. 1 shows.
  • the conveyor is surrounded by a housing 10, a portion of the funnel 8 protrudes from the top thereof.
  • the piston pump and a schematically illustrated motor 11 are accommodated in the housing 10.
  • Each piston 1 is connected to a connecting rod 13 connected to a crankshaft 12 connected to the engine 11.
  • the two other connecting rods, not shown, which are assigned to the other two pistons 1 are also connected to the crankshaft 12 connected.
  • the eccentrics connected to the connecting rods are for a mass balance of the rotating masses distributed around the circumference of the crankshaft 12 arranged.
  • valves 6a, 6b shown are lift valves, each of which has a valve rod 14a, 14b include.
  • the distal end of the valve rods 14a, 14b is with a control and Drive device connected by in the embodiment shown a schematically illustrated camshaft 15 is formed, the rocker arm, of which only the rocker arm 16a for the inlet valve 6a is shown with the respective Valve 6a, 6b is connected.
  • the overhead camshaft 15 is again with a belt, not shown, coupled to the crankshaft 12 and is about this is driven by the motor 11.
  • valves 6a, 6b are each via a schematically indicated spring 17a, 17b biased such that they without the action of the camshaft 15 in their held in the open position.
  • valves 6a, 6b have one the valve surface 6a ', 6b' facing the working space, which is concavely curved.
  • the concave curvature of the valve surface 6a ', 6b' corresponds to the curvature of the concave Dome 3, which closes the end of the work space 6.
  • the closed Position of the valves 6 thus form the valve surfaces facing the working area 6a ', 6b' together with the dome 3 form a surface which has no shoulder and closes the work area 4 smoothly on the front side.
  • the piston has a convex piston surface 1 ', whose curvature essentially corresponds to the curvature of the dome 3 equivalent.
  • the edge of the piston that closes the working space 4 1 a lip seal 18.
  • a piston ring 19 is provided on the piston 1, which is in frictional contact with the peripheral surface of the cylinder 2. Through the Material selection of this piston ring 19 can be the frictional contact between the piston 1 and the cylinder 2 can be adjusted.
  • FIG. 3 is a detailed view the representation in Fig. 2 shows.
  • the piston 1 is shown in a position in which it is at its top dead center is located, whereas the position of the piston 1 shown in Fig. 2 in the region of bottom dead center in Fig. 3 is shown with dashed lines.
  • valves 6 in the illustration according to FIG. 3 corresponds to that shown in FIG. 2 Position of the valves 6.
  • Each valve 6a, 6b has a valve surface 6a ", 6b" facing away from the working space 4. on that is convex.
  • the inlet and outlet channels 7a, 7b each have a concave Recess 20a, 20b, which in the illustrated embodiment is formed symmetrically to the axis of the respective valve rod 14a, 14b.
  • the curvature of the valve surfaces 6a ", 6b" facing away from the work area is somewhat stronger curved as the curvature of the concave recesses 20a, 20b. This is only for the outlet valve 6b indicated in Fig. 3, but also applies to the outlet valve 6a.
  • valve rods 14a, 14b of the valves 6a, 6b are guided in a guide 22a, 22b, the opening of the guide 22a, 22b to the inlet channel 7a and the outlet channel, respectively 7b is provided with a first lip seal 23a, 23b.
  • the guide 22a, 22b also includes a rinsing chamber 24a, 24b, which the respective valve rod 14a, 14b partially surrounds.
  • Each washing compartment 24a, 24b is at a connection 25a, 25b via not shown Lines connected to a piston pump, so that cleaning or disinfecting liquid can circulate in the respective washing compartment 24a, 24b.
  • Every washroom 24a, 24b is in turn opposed by a second lip seal 26a, 26b distal end of the respective valve 6a, 6b sealed.
  • the cylinder 2 has a seal 27 arranged with the peripheral surface of the piston 1 works together. Between this seal 27 and the lip seal 18 can Via a connection 28a, 28b, rinsing liquid into an annularly shaped rinsing space 29 be passed between the piston 1 and the cylinder.
  • the rinsing liquid For better distribution of the rinsing liquid are in the embodiment 2 shown on the circumference distributed connections 28a, 28b are provided.
  • This flushing system prevents in the same Air penetration, such as the washrooms 24a, 24b. It also serves Flushing system for cleaning the annular-shaped washing chamber 29 and on the Cylinder 2 adjacent lip seal 18.
  • the piston ring 19 has a plurality of openings which are continuous in the axial direction.
  • connections 31a, 31b can be provided with which the open to the crankshaft Annular gap between the piston 1 and the cylinder 2 can be flushed.
  • the piston 1 When the piston pump is operating, the piston 1 becomes due to the rotation of the crankshaft 12 cyclically moved back and forth so that the piston 1 cyclically the working space 4 enlarged and reduced.
  • the valves 6a, 6b controlled in such a way that when the work space 4 is enlarged, Piston 1, the inlet valve 6a is open and the outlet valve 6b is closed, whereas with a reverse movement of the piston 1, the two valves in are in the opposite position.
  • valve surface 6a 'facing the working space 4 is in the open position of the Inlet valves 6a passes into the inlet channel 7a without a shoulder, which results when filling the working space 4 a smooth flow of the mass to be conveyed in the inlet channel 7a.
  • the piston 1 Since the piston 1 has a lip seal at its edge that closes the working space 4 18, can not be promoted during the working movement of the piston 1 Mass get into the gap between the piston circumference and the inner surface of the cylinder. Since also the convex curvature of the piston surface 1 'of the concave Curvature corresponds to the dome 3 that closes the working space 4 and the piston 1 almost touches the dome 3 at its top dead center, remains at the end of the Expulsion phase of the mass from the work area 4 only a minimal amount Mass to be promoted in the work area 4.
  • FIGS. 1 to 3 points, due to the coordinated geometric design the dome 3 and the piston 1 and the working space 4 facing Valve surfaces 6 'on the one hand and the geometric configuration of the inlet and outlet channels 7a, 7b and the valve surfaces 6a ", 6a" facing away from the working space 4 on the other hand, almost no dead spaces in which the mass to be promoted can fix. Rather, the geometric configuration ensures that the mass to be conveyed is always in the effective flow cross-section, in which the mass to be conveyed during operation of the piston pump in flow motion is held. Therefore, when cleaning the piston pump must be followed dosing the mass only a small amount of residual mass from the piston pump be rinsed out.
  • the piston pump shown in FIGS. 1 to 3 can be operated at a speed of 30-120 revolutions per minute can be operated.
  • Each of the three pistons 1 and associated cylinder 2 and the stroke are designed such that a Stroke of about 1.5 liters.
  • the piston pump shown in the embodiment has a capacity of 135 to 450 liters per minute.
  • Provided the mass to be conveyed is a sausage mass or sausage meat, a maximum output of about 27 tons per hour.
  • FIG. 4 shows another embodiment of the essential components of the invention Piston pump shown. 1 and 3 are the same Components with the same reference numerals.
  • the exemplary embodiment shown in FIG. 4 has a piston surface 1 'which is convex in the shape of a hemisphere.
  • the dome also points accordingly 3 a hemispherical curvature, at the curvature of which also the work area 4 facing valve surfaces 6a ', 6b' are adapted. Due to the curvature of the Piston surface 1 'on the one hand and the dome 3 on the other hand, the delivery behavior affects the piston pump.
  • the respective Geometry can be a directional flow, especially in the last section of the piston stroke, can be achieved in the direction of the outlet opening 5b, whereby the Ausfördem the mass from the work area 4 is improved.
  • valves 6a, 6b shown in FIG. 4 there is a peripheral surface 6a '' 'of the inlet valve 6a or a peripheral surface 6b '' 'of the exhaust valve 6b on a wall 7a' or 7b 'of the inlet channel 7a or the outlet channel 7b.
  • This Effect increases with the proportion of the circumferential surface that is on the wall 7a ', 7a' of the or outlet channel 7a, 7b.
  • the inlet channel 7a and the outlet channel have 7b in the exemplary embodiment shown in FIG. 4, no spherically curved ones Recordings for the valves 6a, 6b. Instead, the walls are the recording concave through bevelled walls. This configuration can be easier to manufacture and just gives a slightly deteriorated effect compared to the spherically curved recesses 20a, 20b according to that in FIGS 3 illustrated embodiment.
  • Piston pump have an inlet valve 6a that opens to the outside, i.e. in its closed position is closer to the work area than in its open position, the inflow of the mass is not through parts of the inlet valve 6a in the area the inlet opening 5a obstructed. Due to the location of the lip seal 18 Piston 1 and the position of the lip seals 23a, 23b to the respective valves 6a, 6b gaps are avoided at these points, in which the promoting Can set mass.
  • valve rod 14a, 14b Due to the cleaning or disinfecting liquid circulating in the washing compartment 24a, 24b germs located on the respective valve rod 14a, 14b are killed or contaminants washed away. Because the valve rod 14a, 14b due to the movement of the respective valves 6a, 6b almost completely through the respective washing compartment 24a, 24b is pulled, the cleaning or disinfecting effect on one great length of the valve rod 14a, 14b achieved.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Geometry (AREA)
  • Details Of Reciprocating Pumps (AREA)
  • Reciprocating Pumps (AREA)

Claims (14)

  1. Pompe à piston
    comportant au moins un espace de travail (4) entouré par un cylindre (2), qui est modifiable par un piston (1) disposé dans le cylindre (2),
    comportant au moins une soupape d'admission (6a) et au moins une soupape d'échappement (6b),
    les soupapes (6a, 6b) étant des soupapes à levée et pouvant être commandées et entraínées par un dispositif de commande et d'entraínement (15, 16a, 17a, 17b), la soupape d'admission (6a) étant plus proche de l'espace de travail (4) dans sa position fermée que dans sa position ouverte,
    caractérisée en ce que la surface de soupape (6a', 6b') de la soupape d'admission et/ou de la soupape d'échappement (6a, 6b) orientée vers l'espace de travail (4) se raccorde sans décrochement à la surface intérieure de l'espace de travail (4) dans la position fermée de la ou de chaque soupape (6a, 6b).
  2. Pompe à piston selon la revendication 1, caractérisée en ce que les soupapes (6) sont disposées sur la face frontale de l'espace de travail (4).
  3. Pompe à piston selon la revendication 2, caractérisée en ce que la surface du piston (1') a une configuration convexe et que l'espace de travail (4) à sa face frontale est terminée par une coupole (3) concave, dont la surface intérieure est partiellement constituée par les soupapes (6a, 6b).
  4. Pompe à piston selon l'une des revendications précédentes, caractérisée en ce que la surface de soupape (6a", 6b") de la soupape d'admission et/ou de la soupape d'échappement (6a, 6b) orientée à l'opposé de l'espace de travail (4) a une configuration convexe.
  5. Pompe à piston selon la revendication 1, caractérisée en ce qu'un canal d'admission et un canal d'échappement (7a, 7b) sont prévus, qui présentent chacun un évidement concave (20a, 20b) pour recevoir la soupape (6a, 6b) respective dans sa position ouverte.
  6. Pompe à piston selon la revendication 4 et 5, caractérisée en ce que la surface de soupape orientée à l'opposé de l'espace de travail (4) est plus fortement bombée que l'évidement concave (20a, 20b) du canal d'admission ou du canal d'échappement (7a, 7b).
  7. Pompe à piston selon l'une des revendications précédentes, caractérisée en ce que le canal d'admission ou le canal d'échappement (7a, 7b) se raccorde sans décrochement à la surface de soupape (6a', 6b') orientée vers l'espace de travail (4) dans la position ouverte de la ou de chaque soupape (6a, 6b).
  8. Pompe à piston selon l'une des revendications précédentes, caractérisée en ce que la surface périphérique (6a''', 6b''') de la soupape d'admission ou la soupape d'échappement (6a, 6b) s'appuie au moins partiellement sur une paroi (7a', 7b') du canal d'admission ou du canal d'échappement (7a, 7b).
  9. Pompe à piston selon l'une des revendications précédentes, caractérisée en ce que les soupapes (6a, 6b) sont guidées dans un guide (22a, 22b), dont l'ouverture vers le canal d'admission ou le canal d'échappement (7a, 7b) est pourvue d'un premier joint d'étanchéité à lèvre (23a, 23b).
  10. Pompe à piston selon la revendication 9, caractérisée en ce que le guide (22a, 22b) comporte un espace de rinçage (24a, 2'b) entourant une partie de chaque soupape (6a, 6b), qui est formé entre le premier et un second joint d'étanchéité à lèvre (26a, 26b).
  11. Pompe à piston selon l'une des revendications précédentes, caractérisée en ce que le piston (1) présente sur son arête terminant l'espace de travail (4) un joint d'étanchéité à lèvre (18).
  12. Pompe à piston selon la revendication 11, caractérisée en ce qu'un joint d'étanchéité (27) est prévu sur le cylindre (2) pour la formation d'un espace de rinçage (29) en forme d'interstice annulaire entre le piston (1) et le cylindre (2).
  13. Pompe à piston selon l'une des revendications précédentes, caractérisée en ce que trois espaces de travail distincts (4) sont prévus, dont les pistons (1) sont couplés à un vilebrequin commun (12) et que le dispositif de commande et d'entraínement (15, 16a, 17a, 17b) pour les soupapes d'admission et d'échappement (6a, 6b) est formé par des arbres à cames (12) couplées mécaniquement au vilebrequin (12).
  14. Pompe à piston selon l'une des revendications précédentes, caractérisée en ce que la ou chaque soupape d'admission (6a) peut être fixée dans sa position fermée par un dispositif de blocage.
EP97108943A 1997-06-03 1997-06-03 Pompe à piston Expired - Lifetime EP0882873B1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
DE59709502T DE59709502D1 (de) 1997-06-03 1997-06-03 Kolbenpumpe
EP97108943A EP0882873B1 (fr) 1997-06-03 1997-06-03 Pompe à piston
US09/087,217 US6168398B1 (en) 1997-06-03 1998-05-29 Piston pump having lifting valves with a convex surface
JP10154121A JPH1150956A (ja) 1997-06-03 1998-06-03 ピストンポンプ

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP97108943A EP0882873B1 (fr) 1997-06-03 1997-06-03 Pompe à piston

Publications (2)

Publication Number Publication Date
EP0882873A1 EP0882873A1 (fr) 1998-12-09
EP0882873B1 true EP0882873B1 (fr) 2003-03-12

Family

ID=8226872

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97108943A Expired - Lifetime EP0882873B1 (fr) 1997-06-03 1997-06-03 Pompe à piston

Country Status (4)

Country Link
US (1) US6168398B1 (fr)
EP (1) EP0882873B1 (fr)
JP (1) JPH1150956A (fr)
DE (1) DE59709502D1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006055187B3 (de) * 2006-11-23 2008-03-27 Lesa Maschinen Gmbh Wärmekraftmaschine mit einer Ventilanordnung und Ventilsteuerung für eine solche Ventilanordnung
US8069923B2 (en) * 2008-08-12 2011-12-06 Halliburton Energy Services Inc. Top suction fluid end
US20100154905A1 (en) * 2008-12-19 2010-06-24 Elisabeth Sommer Arrangement for the regulation of a gas stream
JP5369768B2 (ja) * 2009-03-05 2013-12-18 株式会社デンソー ポンプ
JP5911802B2 (ja) * 2009-10-14 2016-04-27 サーモケム リカバリー インターナショナル インコーポレイテッド ピストン部材、ピストン部材を備える装置、ならびに、ピストン部材および装置の使用および方法
US11815075B2 (en) * 2018-09-06 2023-11-14 Cytiva Sweden Ab Pumps

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE354813A (fr)
BE354913A (fr) *
US1012725A (en) * 1908-08-24 1911-12-26 Frederick L Horneffer Motor and compressor.
US2122398A (en) * 1937-06-30 1938-07-05 Laurence D Harrison Air compressor
US2308974A (en) * 1939-11-01 1943-01-19 Lyndus E Harper Positive displacement pump
US2615618A (en) * 1941-04-01 1952-10-28 Chabay Marcel Rene Armand Compressor
US2419091A (en) * 1942-09-26 1947-04-15 Sanders Arthur Freeman Compressor and compressor valve
BE618938R (fr) * 1961-11-30 1962-10-01 Teves Kg Alfred Système d'étanchéité pour pistons ou tiges de piston de cylindres hydrauliques
US3782241A (en) * 1971-10-28 1974-01-01 Gen Electric Zero ullage injection valve
US3923208A (en) * 1974-07-19 1975-12-02 Us Army Fluid expulsion system having a tapered tank
DE2452370A1 (de) * 1974-11-05 1976-05-06 Stahl Geb Quabeck Margarete Vorrichtung zur foerderung von breiigen oder in nur heissem zustand breiige massen, mit hohen sand- und splitteanteilen
US4236881A (en) * 1978-05-03 1980-12-02 Ecodyne Corporation Liquid metering pump
AT384658B (de) * 1981-11-16 1987-12-28 Brandl Dipl Ing Gerhard Einrichtung in einem drucksystem
US4744735A (en) * 1985-10-21 1988-05-17 Niemand Geoffrey S Parallel-cylinder, angled-valve fluid pump
GB2212857B (en) * 1987-12-02 1991-11-27 Benzion Olsfanger An internal combustion engine.
US5252037A (en) * 1992-07-30 1993-10-12 Aseptic Technology Engineering Co. Piston valved vertical pump for particulate materials

Also Published As

Publication number Publication date
EP0882873A1 (fr) 1998-12-09
DE59709502D1 (de) 2003-04-17
JPH1150956A (ja) 1999-02-23
US6168398B1 (en) 2001-01-02

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