EP0223025A2 - Pompe volumétrique pour fluides fonctionnant comme une pompe à pistons tournants - Google Patents

Pompe volumétrique pour fluides fonctionnant comme une pompe à pistons tournants Download PDF

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Publication number
EP0223025A2
EP0223025A2 EP86113596A EP86113596A EP0223025A2 EP 0223025 A2 EP0223025 A2 EP 0223025A2 EP 86113596 A EP86113596 A EP 86113596A EP 86113596 A EP86113596 A EP 86113596A EP 0223025 A2 EP0223025 A2 EP 0223025A2
Authority
EP
European Patent Office
Prior art keywords
housing
membrane
intermediate space
longitudinal bore
pump
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.)
Granted
Application number
EP86113596A
Other languages
German (de)
English (en)
Other versions
EP0223025A3 (en
EP0223025B1 (fr
Inventor
Renato Vicentini
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
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP0223025A2 publication Critical patent/EP0223025A2/fr
Publication of EP0223025A3 publication Critical patent/EP0223025A3/de
Application granted granted Critical
Publication of EP0223025B1 publication Critical patent/EP0223025B1/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
    • F04B43/00—Machines, pumps, or pumping installations having flexible working members
    • F04B43/12—Machines, pumps, or pumping installations having flexible working members having peristaltic action
    • F04B43/14—Machines, pumps, or pumping installations having flexible working members having peristaltic action having plate-like flexible members

Definitions

  • the invention relates to a volumetric pump acting in the manner of a rotary lobe pump for liquid or gaseous media, which has a motor-driven rotary lobe in a housing with inlet and outlet openings for the conveying medium, which is rotatably mounted in the housing bore around its longitudinal axis.
  • the housing has the shape of a rigid, one-piece or multi-piece, for example tubular shaped piece with a cylindrical longitudinal bore, in which a tubular or, for example, band-shaped but tubular membrane is provided, which is in the area of the two cylindrically shaped axial ends of the longitudinal bore of the housing is attached to it over the entire circumference in a liquid-tight and / or gas-tight manner and runs between these two axial ends at a distance from the wall of the longitudinal bore, in such a way that it forms an intermediate space with it does not form a self-contained ring, the two circumferential ends of which are closed and insulated from one another in such a way that the membrane is attached to the housing without interruption and with a good seal over the entire axial length; that in the area of the aforementioned th circumferential ends two openings are provided which connect the intermediate space with the medium inflow or outflow and can form the suction opening or the discharge opening; and that in the interior of the unit consist
  • the invention therefore consists in the design of a pump for liquid or gaseous media, the mode of operation of which is new.
  • a rigid tubular element has in the region of the inner cylindrical generatrix an annular channel which extends in the radial direction, and in this case the inner surface of the tubular element is covered by an elastic membrane which bears against the wall and acts as a seal and which also acts as a channel covers, but it stands away from the bottom of this channel.
  • the canal is therefore an annular cavity that is isolated from the environment.
  • the membrane is allowed to rest continuously against the bottom of the channel, thus making two ends of the intermediate space insulated, opposite which two holes are incorporated in the tubular rigid element, which form the suction opening and the discharge opening.
  • the present invention claims a volumetric pump which has no size limit, but it is particularly advantageous to apply the invention to the small and smallest pumps which often have start-up problems and which, in order to avoid these problems, require motors which are more suitable Way are oversized.
  • all volumetric pumps are manufactured in such a way that the motor is in the start-up state under load, since the pumping cavities are moved directly by the motor and the friction to be overcome during start-up, or the corresponding torque, especially in small machines is greater than the moment that the motor can deliver as a result of random external factors.
  • the motor starts idling, single With the increase in speed, the pumping effect is started.
  • the pump would operate idle, reaching a speed even greater than the operating speed, thereby promoting fluid crumbling and pump reactivation.
  • the smallest and smallest pumps are used in applications that require fast and irregular work, many are also used in environmental conditions that are extremely variable, with dust, moisture, corrosive media, etc. in the Medium may be present, they also often have to work at temperatures that are very variable, which is why start-up could also be critical. For example, very low temperatures can freeze the moisture contained in the medium, which is condensed at certain points in the pump, thereby jeopardizing the start-up, even if this is only temporary.
  • the known pumps all have more or less the above-mentioned problems with regard to their function and mode of operation, for example the gear pumps, the capsule pumps, the vane pumps, the piston pumps, etc.
  • pumps whose pumping element has a flexible tube or hose between the suction mouth and drain mouth which is very soft and pliable and which is squeezed together by a rotating triangular prism, being divided into small chambers filled with liquid which is in motion between the suction mouth and the drain mouth.
  • This latter pump is very simple and economical and widely used, but this pump also does not solve the problem of starting under load, including the pumping one Tubes or tubes are heavily used and are therefore subject to rapid wear and aging.
  • the pump according to the invention solves the problems existing in the conventional volumetric pumps, since the fluid is separated and isolated from the rotating parts, because the engine starts idling and finally because the load on the Membrane necessary for pumping is minimal while still having a degree of sealing between the pumping chambers that is larger than the tube or tubing pump described above.
  • the motor is designated 10, the direction of rotation is indicated by the arrow 11; 2 is the rotor, which carries two spherical or spherical masses 22, 23 in the recesses 20 and 21, the above information only serving as an example, in no way should be restrictive, neither in terms of the number nor in terms of the shape of the masses.
  • the two masses can move freely and slide in the recesses 20 and 21 and thereby assume any position that lies between the axes 24 and 25 for the mass 22 and 26 and 27 for the mass 23.
  • Positions 24 and 26 are taken when the pump is stopped, positions 25 and 27 are taken when the motor is running and the pump is working and consequently the membrane 4 deforms until it bears against the bottom of the channel 54.
  • the drawing shows, by way of example only, an embodiment of the pump according to the invention, in which the rigid body 5 consists of two identical halves: half 50 and half 51, against which the membrane 4 is pressed from the inside; in this constructive solution, it does not have to be that the membrane has a tubular shape, but it can simply consist of a band, made of a suitable elastomer, the height of which is designated 41 and which is wound on two rings 60 and 61, through which Projection or projection 62 are connected to form a single piece, and which together form the piece 6 for holding the membrane.
  • the projection or projection 62 serves to hold the legs of the band 42 and 43 (Fig. 1) and the peripheral ends 30 and 31 of the annular Isolate and seal the space.
  • the two halves 50 and 51 are firmly connected to one another around the element 6 and aligned and fastened to one another by means of bores and corresponding pins or pins 59, and are held by means of the formations 55 and 56 of the body 5 and the corresponding counterparts 63 and 64 the membrane 4 tight.
  • the projection or projection 62 carries the thickening 65 or a corresponding shaped piece in order to better hold the legs of the band 4.
  • the halves or half-shells 50 and 51 of the housing 5 carry the connections 52 and 53 for the medium lines, which are oriented and aligned parallel to the ZZ axis in order to facilitate the pressing of the aforementioned half-shells, but the connections can also be oriented or fitted differently can.
  • 7 is the lid with the holder 71 for the rotor; 57 and 58 are the grooves for holding the cover 7 and the motor 1.
  • the chamber 33 does not change its volume since the relative position of the two balls 22 and 23 are fixed to each other, but they move forward in the sense of movement.
  • the chamber 34 becomes smaller and smaller because the mass 23 is flowing in front, and as a result the fluid is expelled in the direction of the arrows 36. If the ball 23 exceeds the connection 53, the fluid or medium contained in the chamber 33 will reach the outlet opening 36; then the ball 23 moves in the direction of the suction opening 32, an identical cycle as that of the ball 22 follows.
  • the function of the pump is reversed, that is to say the opening 53 becomes the suction opening, the opening 52 the discharge or discharge opening.
  • the criteria for the dimensioning of this pump are simple because the medium transported depends on the number of revolutions times the volume of the annular space minus the dead volume of the masses.
  • the pressure to which the pump can bring the medium is proportional to the square of the number of revolutions, and the exact value can be determined using the formula relating to the centrifugal force, taking into account that this is the product of the pressure must counteract the fluid and the surface of the ball associated with the drain opening without neglecting the angle of incidence.
  • the maximum outlet pressure can be regulated, its theoretical diagram from the delivery quantity Q of air or fluid at normal intake pressure and the pressure P, for example, for a hypothetical number of Orbital movements n 1 and for a different speed n 2 is shown in FIG. 4.
  • the pump according to the invention can therefore be an advantageous device consisting of the pump and the pressure regulator is composed that works simply based on the speed. With the help of an electronic control with a closed ring, finely regulated pressures can be achieved in this way.
  • the body 5 may be in one piece and also have an inner surface that is smooth and has no channel; in this case the annular space may e.g.
  • the membrane 4 can be obtained by means of the membrane 4 which is stretched inside the housing or body 5 in such a way that it itself forms the annular space; the membrane can, moreover, be attached to the inside of the body or housing 5 by means of any other suitable system, apart from the arrangement described above using the body 6, and it can be attached directly to the suitable walls described above by gluing or vulcanizing; in this case the masses can be two small cylinders, the height of which is equal to or greater than the height of the annular space.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)
EP86113596A 1985-11-18 1986-10-02 Pompe volumétrique pour fluides fonctionnant comme une pompe à pistons tournants Expired - Lifetime EP0223025B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT8561485 1985-11-18
IT8585614A IT1210536B (it) 1985-11-18 1985-11-18 Pompa volumetrica per fluidi liquidi o gassosi.

Publications (3)

Publication Number Publication Date
EP0223025A2 true EP0223025A2 (fr) 1987-05-27
EP0223025A3 EP0223025A3 (en) 1988-02-10
EP0223025B1 EP0223025B1 (fr) 1990-12-12

Family

ID=11329005

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86113596A Expired - Lifetime EP0223025B1 (fr) 1985-11-18 1986-10-02 Pompe volumétrique pour fluides fonctionnant comme une pompe à pistons tournants

Country Status (3)

Country Link
EP (1) EP0223025B1 (fr)
DE (1) DE3676167D1 (fr)
IT (1) IT1210536B (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0320963A3 (fr) * 1987-12-18 1989-11-23 Renato Vicentini Pompe volumétrique pour fluides fonctionnant comme une pompe à pistons tournants
WO1993010357A1 (fr) * 1991-11-22 1993-05-27 Don Dame Pompe centrifuge a membrane flexible, sans joint d'etancheite
EP3056733A4 (fr) * 2013-10-09 2017-09-06 Welco Co., Ltd Pompe

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH331944A (fr) * 1956-02-03 1958-08-15 Clarence Ford Reginald Pompe rotative
DE2702123A1 (de) * 1977-01-20 1978-07-27 Hartmut Kowalzik Radial-kugelmembranpumpe

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0320963A3 (fr) * 1987-12-18 1989-11-23 Renato Vicentini Pompe volumétrique pour fluides fonctionnant comme une pompe à pistons tournants
WO1993010357A1 (fr) * 1991-11-22 1993-05-27 Don Dame Pompe centrifuge a membrane flexible, sans joint d'etancheite
EP3056733A4 (fr) * 2013-10-09 2017-09-06 Welco Co., Ltd Pompe
US10253767B2 (en) 2013-10-09 2019-04-09 Welco Co., Ltd Pump

Also Published As

Publication number Publication date
IT1210536B (it) 1989-09-14
EP0223025A3 (en) 1988-02-10
EP0223025B1 (fr) 1990-12-12
IT8585614A0 (it) 1985-11-18
DE3676167D1 (de) 1991-01-24

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