EP0826883B1 - Pompe à piston rotatif - Google Patents

Pompe à piston rotatif Download PDF

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Publication number
EP0826883B1
EP0826883B1 EP19970114889 EP97114889A EP0826883B1 EP 0826883 B1 EP0826883 B1 EP 0826883B1 EP 19970114889 EP19970114889 EP 19970114889 EP 97114889 A EP97114889 A EP 97114889A EP 0826883 B1 EP0826883 B1 EP 0826883B1
Authority
EP
European Patent Office
Prior art keywords
rotary piston
rotary
cylinder
rotary cylinder
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
EP19970114889
Other languages
German (de)
English (en)
Other versions
EP0826883A3 (fr
EP0826883A2 (fr
Inventor
Werner E. Friedrich
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
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Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to DE59703496T priority Critical patent/DE59703496D1/de
Priority to AT97114889T priority patent/ATE201088T1/de
Publication of EP0826883A2 publication Critical patent/EP0826883A2/fr
Publication of EP0826883A3 publication Critical patent/EP0826883A3/fr
Application granted granted Critical
Publication of EP0826883B1 publication Critical patent/EP0826883B1/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
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2/00—Rotary-piston machines or pumps
    • F04C2/30—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members
    • F04C2/34—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in groups F04C2/08 or F04C2/22 and relative reciprocation between the co-operating members
    • F04C2/344—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in groups F04C2/08 or F04C2/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member
    • F04C2/352—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in groups F04C2/08 or F04C2/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member the vanes being pivoted on the axis of the outer member

Definitions

  • the invention relates to a rotary piston pump.
  • a rotary piston compression technique is known from EP 0 613 516 B1 and US 5,636,610 known.
  • An eccentrically mounted rotating double piston in a rotating cylinder bridges constantly varying distances and angular positions during one revolution between the rotating double piston and the rotating cylinder by scissors moving parts of the rotary double piston.
  • a disadvantage of. this state of the art many parts and high shear and friction forces.
  • GB 669653A which discloses a rotary piston pump with the features of the preamble of claim 1, uses these basic features of the rotary piston pumps listed here.
  • the technical features of GB669653A e.g. also agree with some of the Features of the new rotary piston pump presented here.
  • the US 1 535 275A (D2), however, have not so far recognized the need and advantage that for a positive displacement pump, its rotating Rotate parts without contact and their seals over the slot widths of the sealing lines should be regulated, the features of the rotary piston are advantageously designed so that a part-circular segment of the rotary piston, the intake and exhaust channels in the circumferential direction the cylindrical chamber at least briefly with each revolution The rotary piston and its part-circular segment must always be able to close in each rotational position on the suction and pressure side, a positive seal with the cylindrical Chamber and the rotary cylinder must reach.
  • the object of the invention is to provide a versatile rotary piston pump with few moving parts, low friction losses and low efficiency.
  • a rotary piston pump preferably has a housing cylindrical chamber with a first diameter in the housing.
  • Intake and outlet channels for the medium to be pumped lead through the housing into the cylindrical chamber.
  • On the side boundary walls in the cylindrical Chamber is rotatably mounted a rotary cylinder with a second diameter, the smaller is than the first diameter, with the rotary cylinder having a portion of the cylindrical chamber between the suction and outlet channels forms a seal.
  • Rotary piston which is rotatably mounted coaxially to the cylindrical chamber and on his Has a part-circular segment, forms a with the part-circular segment Seal with the cylindrical chamber.
  • the rotary piston of driven outside the housing, the rotary piston in turn the Rotating cylinder drives.
  • the part-circular segment extends so far in the circumferential direction of the cylindrical Chamber that the intake and outlet channels in a closing angle position simultaneously from cantilevered rotary piston can be closed.
  • the rotary piston pump according to the invention is a positive displacement pump. You can on valves dispense and is particularly compact, versatile and can be used as a feed, dosing or vacuum pump or compression technology for internal combustion engines.
  • the rotary piston pump according to the invention achieves high pressures, precise dosing and advantageously promotes liquid and gaseous media with an expected better efficiency than comparable conventional pumps.
  • the pump according to the invention is composed of a few parts, between which comparatively low frictional forces act. Also enables this pump non-contact rotations of the rotating functional parts with each other.
  • the rotary cylinder is circular Grooves of the side boundary walls or in bushings of the side boundary walls guided.
  • the rotary cylinder Equipped with tangentially displaceable sealing elements that rest against the rotary piston.
  • the Rotary piston between storage in the side boundary walls and the part-circular Segment shaped in such a way that rotary cylinders and Place the rotary pistons against each other and form a seal to the working chamber.
  • the Rotary pistons are provided with a sliding sleeve, which is located between the side bearings Boundary walls and the part-circular segment and the rotating cylinder movable is guided and the rotation cylinder and the Rotating pistons to each other and to the working chamber seals.
  • cooling or heating chambers are in the housing intended.
  • FIG. 1 shows the interior of the cylindrical chamber 10 for better clarification Rotary piston 1 and rotary cylinder 2.
  • a rotary piston pump of a first type has a housing 17 with a cylindrical chamber 10 with a first diameter on the chamber 10 is through the inner lateral surface 5 and delimited by two flat side walls 6.
  • the inner surface 5 of the chamber 10 could also be spherical, but preferably it has a surface shape, which is technically easy to manufacture.
  • An intake duct 8 through housing 17 and an outlet duct 9 through housing 17 each lead into the chamber 10.
  • Eccentric but parallel to the axis of the cylindrical chamber 10 is in the two flat lateral boundary walls 6 a rotary cylinder 2 with a second Diameter that is smaller than the first diameter, stored in circular grooves 15, wherein the rotary cylinder 2 is arranged in the chamber 10 that between the intake duct 8 and outlet duct 9 from the rotary cylinder 2 have a seal 18 on the inner lateral surface 5 is formed with the chamber 10.
  • the are the inner surface 5 and the lateral boundary walls 6, forms the Rotary cylinder 2 of the rotary piston pump according to the invention a sickle-shaped Section of chamber 10.
  • Rotary cylinder 2 is a cylinder jacket that is open on one side.
  • the one facing chamber 10 Surface of the races 4 is flat with the side boundary walls 6 of the cylindrical chamber 10.
  • the rotary piston 1 has a part-circular segment on the circumference, which in its Angle position (Fig. 3) both the intake duct 8 and the outlet duct 9 and intermediate seal 18 covers, so that both the Connection of the intake duct 8 and that of the outlet duct 9 to the chamber 10 is interrupted is.
  • Cooling or heating chambers can be located in the housing 17 of the rotary piston pump according to the invention 13 can be created.
  • Rotary piston 1 drives the rotary cylinder 2.
  • Figure 3 shows the housing and functional parts of the first type of rotary piston pump the rotary piston 1 in its closing angle position. Both the intake duct 8 and the outlet channel 9 are through the part-circular segment of the protruding rotary piston 1 closed. In this position, the maximum achievable, precisely metered suction volume is in the chamber 10 included.
  • Fig. 4 The rotating piston 1 rotating in the direction of the arrow on the piston shaft 7 begins Promote or compress medium in the chamber 10.
  • the outlet channel 9 is open.
  • Rotary piston 1 closes the inlet channel 8.
  • the liquid or gaseous medium of the chamber 10 can be unhindered by the rotating rotary piston 1 through a pressure valve, i.e. without corresponding throttling losses, from the chamber 10 in the outlet channel 9 are conveyed on. Pressure builds up in chamber 10.
  • the pressure continues to increase as the rotary piston 1 continues to rotate on the pressure side.
  • the In this rotational position the suction-side inner rotor leg 20 has the apex on the sealing line 18 almost reached, so that the entire rotary cylinder jacket 2 after this rotational position can withstand high pressures.
  • Fig. 5 In this position, the rotary piston pump according to the invention both sucks and expresses too.
  • the medium to be pumped flows through a suction valve without throttling losses through the suction channel 8 into the chamber 10.
  • the pump medium Flows out without valve throttling.
  • the slide valve 3 has reached its widest deflection.
  • Fig. 6 The pumping process per revolution is completed on the pressure side.
  • the rotary piston pump according to the invention can be cooled at high outputs to be transmitted, or in heating chambers 13 tough pumping media can be kept at the required pump viscosity by certain temperature settings, which enables better pumping.
  • the rotary piston 1, which according to the invention with its part-circular segment Forms seal with the cylindrical chamber 10 has a in the embodiment Cross-sectional profile comparable to a mushroom with a flat cap and a strong stem.
  • the sweeping Piston cover 24, 25 as a part-circular segment fulfills the sealing function to chamber 10 and has closing and opening functions for the intake duct 8 and the outlet duct 9, respectively.
  • the rotary cylinder 2 which is formed from two symmetrical halves, engages around the legs 20, 21 the rotary piston 1 on both sides below the piston covers 24, 25.
  • the Rotary cylinder 2 has cutouts 23 on its legs 20, 21 Profiles suitable for the pressure and suction side piston covers 24, 25, which recesses the overlapping parts of the piston ceilings on the pressure and suction sides 24, 25 offer precisely fitting piston bed 23.
  • this second design can be dispensed with additional movable sealing elements.
  • the symmetrical specific designs of the rotating parts ensure a tight fit both rotating bodies against each other in every turning phase.
  • Another alternative rotary piston pump of a third type is one other storage of the rotary cylinder 2 and a specific sealing and guiding device designed between the rotary piston 1 and rotary cylinder 2 (Fig. 12 and 13).
  • the bearing function for the rotary piston 2 is performed by flat cylinder liners 16 in the two Sidewalls 6.
  • Figures 14 to 17 show the operation of the third type of the invention Rotary piston pump in different working positions of one revolution. To the previous ones Explanations to Figures 1 to 6 and 7 to 11 are also referred to again.
  • the sliding sleeve 11 is always at the same distance between the Rotational cylinder legs 20, 21 held.
  • the changing distances and angular positions between the piston rod 19 and the rotary cylinder legs 20, 21 during a Revolution can thus be bridged, i.e. an even seal between Rotary piston 1 and rotary cylinder 2 is also in this in every rotational angle position Design ensured.
  • the cylinder liners 16 in the side walls 24 of the housing 17 result in a simpler one Construction.
  • the on the piston rod 19 forcibly guided sleeve 11 as a sealing element between the rotating parts creates a reliable for specific applications and working conditions and beneficial seal.
  • the rotary piston pump according to the invention offers in its various designs as Displacement pump depending on the version compared to most traditional pump technologies a number of advantages, such as compact design, function without valves, can be used for liquid and gaseous pump media; it achieves high pump pressures with high ones Stability, enables precise dosing, is low in pulsation and self-priming, can promote gently.
  • this pump principle is versatile and a. as Feed pump with low to high pressure output, as a metering pump, as a vacuum pump, as Compressor or as a compression part e.g. in internal combustion engines.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)
  • Reciprocating Pumps (AREA)

Claims (9)

  1. Pompe à piston rotatif comprenant un carter (17),
    une chambre (10) de préférence cylindrique située dans le carter (17) avec un premier diamètre,
    des parois de limitation latérales (6) de la chambre (10) de préférence cylindrique,
    des canaux d'aspiration et d'évacuation (8, 9) du milieu à acheminer qui, traversant le carter (17), passent dans la chambre (10) de préférence cylindrique,
    un cylindre rotatif (2) logé de façon à pouvoir tourner sur les parois de limitations latérales (6) avec un deuxième diamètre qui est plus petit que le premier diamètre, ledit cylindre rotatif (2) étant un corps de cylindre ouvert d'un côté qui forme, avec une section de la chambre (10) de préférence cylindrique dans le carter (17), un joint (18) entre les canaux d'aspiration et d'évacuation (8, 9), avec une chambre de travail en forme de croissant, dont le volume est limité par la surface latérale interne de la chambre (10) de préférence cylindrique et ses parois latérales (6) ainsi que par la surface latérale externe du cylindre rotatif (2), un côté de la chambre de travail dans le sens de rotation étant en lien avec le canal d'aspiration (8) et l'autre côté de la chambre de travail avec le canal d'évacuation (9), et avec un piston rotatif (1) qui est logé de façon rotative coaxialement à la chambre (10) de préférence cylindrique et pénètre dans le cylindre rotatif (2) et présente à sa périphérie un segment en forme de cercle primitif qui s'étend dans le sens périphérique de la chambre cylindrique (10) jusqu'à ce que les canaux d'aspiration et d'évacuation (8, 9) puissent être fermés simultanément par le piston rotatif (1),
    caractérisé en ce que le piston rotatif (1) ou le cylindre rotatif (2) est actionné de l'extérieur du carter (17) et
    le piston rotatif (1) actionne le cylindre rotatif (2) ou l'inverse et le piston rotatif (1) et son segment en forme de cercle primitif forme, dans chaque position rotative, un joint avec la chambre cylindrique (10) et le cylindre rotatif (2).
  2. Pompe à piston rotatif selon la revendication 1, caractérisée en ce que le cylindre rotatif (2) est guidé dans des rainures circulaires (15) ou des parties préformées en relief comme des tourillons, des rotules, des cônes ou des rails des parois de limitation latérales (6).
  3. Pompe à piston rotatif selon la revendication 1, caractérisée en ce que le cylindre rotatif (2) est guidé dans des boítes de glissement (16) des parois de limitation latérales (6).
  4. Pompe à piston rotatif selon l'une des revendications 1 à 3, caractérisée en ce que le piston rotatif (1) est logé dans le cylindre rotatif (2) ou l'inverse.
  5. Pompe à piston rotatif selon l'une des revendications 1 à 3, caractérisée en ce que le piston rotatif (1) et le cylindre rotatif (2) sont logés l'un dans l'autre.
  6. Pompe à piston rotatif selon l'une des revendications 1 à 5, caractérisée en ce que le cylindre rotatif (2) est doté d'au moins un élément d'étanchéité (3) déplaçable tangentiellement avec lequel le cylindre rotatif (2) est adjacent au piston rotatif (1).
  7. Pompe à piston rotatif selon l'une des revendications 1 à 5, caractérisée en ce que le piston rotatif (1), entre un logement dans les parois de limitation latérales (6) et le segment en forme de cercle primitif, est formé de manière telle que, lors d'une rotation complète du piston rotatif (1), le cylindre rotatif (2) est adjacent côté admission et côté refoulement au piston rotatif (1).
  8. Pompe à piston rotatif selon l'une des revendications 1 à 5, caractérisée en ce que le piston rotatif (1) est doté d'au moins une garniture glissante (11) comme élément d'étanchéité qui est guidée de façon mobile entre un logement du piston rotatif (1) dans les parois de limitation latérales (6) et le segment en forme de cercle primitif comme le cylindre rotatif (2).
  9. Pompe à piston rotatif selon l'une des revendications 1 à 8, caractérisée en ce que des chambres de refroidissement ou de chauffage (13) sont prévues dans le carter (17).
EP19970114889 1996-09-02 1997-08-28 Pompe à piston rotatif Expired - Lifetime EP0826883B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE59703496T DE59703496D1 (de) 1997-08-28 1997-08-28 Rotationskolbenpumpe
AT97114889T ATE201088T1 (de) 1997-08-28 1997-08-28 Rotationskolbenpumpe

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE19635540 1996-09-02
DE19635540 1996-09-02
DE19645501 1996-11-05
DE19645501 1996-11-05

Publications (3)

Publication Number Publication Date
EP0826883A2 EP0826883A2 (fr) 1998-03-04
EP0826883A3 EP0826883A3 (fr) 1998-03-18
EP0826883B1 true EP0826883B1 (fr) 2001-05-09

Family

ID=26028959

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19970114889 Expired - Lifetime EP0826883B1 (fr) 1996-09-02 1997-08-28 Pompe à piston rotatif

Country Status (2)

Country Link
EP (1) EP0826883B1 (fr)
DE (1) DE19730988A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE20002385U1 (de) * 2000-02-10 2001-06-21 Friedrich Werner E Drehschieberverdrängerpumpe
DE10103580B4 (de) * 2001-01-26 2004-04-08 Friedrich, Werner E. Magnetgekuppelte Drehschieberverdrängerpumpe

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1535275A (en) * 1924-01-26 1925-04-28 Westin Oliver Peter Rotary pump
GB669653A (en) * 1949-06-02 1952-04-09 George Herbert Barnes Improvements in rotary pumps, compressors and the like
DE830614C (de) * 1949-09-20 1952-02-07 Juergen Clausen Drehkolbenmaschine
US2814255A (en) * 1956-02-21 1957-11-26 Lorenzetti Lorenzo Hydraulic pump
ES407242A1 (es) * 1972-10-03 1975-09-16 Bosch Barata Perfeccionamientos en motores de combustion interna.
DE3128432A1 (de) * 1980-11-08 1982-06-16 Pierburg Gmbh & Co Kg, 4040 Neuss "drehfluegelpumpe und verfahren zum betreiben derselben"
DE3135254A1 (de) * 1981-09-05 1983-03-17 Robert Bosch Gmbh, 7000 Stuttgart Fluegelkolbenpumpe
DE3412971A1 (de) * 1984-04-06 1985-10-24 Pierburg Gmbh & Co Kg, 4040 Neuss Drehkolbenpumpe
DE8434465U1 (de) * 1984-11-24 1986-03-27 Robert Bosch Gmbh, 7000 Stuttgart Flügelabdichtung in Flügelzellenpumpen
DE3826326C2 (de) * 1987-08-08 1998-07-02 Barmag Barmer Maschf Flügelzellenvakuumpumpe
DE4138204C1 (fr) * 1991-11-21 1992-12-10 Friedrich, Werner E., 6708 Neuhofen, De

Also Published As

Publication number Publication date
EP0826883A3 (fr) 1998-03-18
EP0826883A2 (fr) 1998-03-04
DE19730988A1 (de) 1998-03-12

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