EP0144888B1 - Oil-sealed vane pump - Google Patents

Oil-sealed vane pump Download PDF

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Publication number
EP0144888B1
EP0144888B1 EP84114285A EP84114285A EP0144888B1 EP 0144888 B1 EP0144888 B1 EP 0144888B1 EP 84114285 A EP84114285 A EP 84114285A EP 84114285 A EP84114285 A EP 84114285A EP 0144888 B1 EP0144888 B1 EP 0144888B1
Authority
EP
European Patent Office
Prior art keywords
stator
oil
tank
shell
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.)
Expired
Application number
EP84114285A
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German (de)
French (fr)
Other versions
EP0144888A2 (en
EP0144888A3 (en
Inventor
Jean-Marc Paquet
René Sibuet
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.)
Alcatel CIT SA
Original Assignee
Alcatel CIT SA
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Publication date
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Application filed by Alcatel CIT SA filed Critical Alcatel CIT SA
Priority to AT84114285T priority Critical patent/ATE32123T1/en
Publication of EP0144888A2 publication Critical patent/EP0144888A2/en
Publication of EP0144888A3 publication Critical patent/EP0144888A3/en
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Publication of EP0144888B1 publication Critical patent/EP0144888B1/en
Expired 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
    • F04C27/00—Sealing arrangements in rotary-piston pumps specially adapted for elastic fluids
    • F04C27/02—Liquid sealing for high-vacuum pumps or for compressors

Definitions

  • the present invention relates to a vane oil seal pump.
  • Such a pump essentially comprises a stator constituted by a body comprising a cylindrical housing in which rotates eccentrically, tangentially to a generator of said housing, a rotor also cylindrical.
  • the rotor carries two diametrically opposite vanes applied by springs against the stator (and by centrifugal force).
  • a suction orifice and a discharge orifice open into the stator respectively on either side of the tangent generator of the stator and of the rotor.
  • the discharge port is fitted with a non-return valve.
  • the seat of this valve is formed by the bottom of a counterbore made in the stator. the assembly is placed in a closed tank, filled with oil.
  • the suction orifice is connected to a conduit opening out of said tank while the delivery orifice opens into the tank, which itself has an outlet orifice.
  • a comparable pump is known from GB-A-1 140 452.
  • the entry of oil into the stator, for lubrication and sealing between the vanes and the stator and between the rotor and its line of tangency with the stator, is carried out by an injection orifice on a lateral flange closing the stator.
  • This orifice is provided with a closing valve set in alternating opening and closing movement, during the operation of the pump, by means of a rotary device secured to the axis of the rotor.
  • This shut-off valve prevents oil from entering the stator during periods when the pump is stopped.
  • the stator will fill with oil and the next time the pump is started, a large amount of oil is expelled through the discharge port.
  • the passage section between the valve, located at the discharge orifice and the walls of the counterbore in which the valve is placed is small and insufficient for the passage of such a flow of oil, which causes deterioration of the valve and possibly its spring: risk of deformation, jamming, etc.
  • the present invention aims to overcome the drawback described above and relates to a vane oil seal pump comprising a stator and a rotor, the assembly being located in a closed tank containing oil , the stator comprising an oil injection orifice, a suction orifice connected to a pipe opening out of said tank and a delivery orifice opening into the tank, the delivery orifice being provided with an anti-valve return, said valve being housed in a counterbore made in the stator, said tank further comprising a discharge orifice, characterized in that at least one groove is formed in said stator, this groove opening into said counterbore.
  • said groove opens into said counterbore at a level very slightly higher than the bottom of said counterbore.
  • this groove starts from the periphery of the stator, opens into said counterbore and extends beyond the diametrically opposite wall of the counterbore.
  • FIG. 1 which shows a well known oil seal vane pump
  • a stator 1 a rotor 2 eccentric so as to be tangent to a generator G of the stator.
  • the rotor carries sliding vanes 3 and 4 actuated by springs 5 and by centrifugal force.
  • the assembly is placed in a tank 6 full of oil 7.
  • the stator has a suction port 8 connected to a pipe 9 opening out of the tank 6; it further comprises a discharge orifice 10 opening directly into the tank.
  • This discharge orifice is provided with a non-return valve 11, the seat of which is located at the bottom of a circular counterbore 12.
  • the valve 11 rests on the bottom of the counterbore 2 by the thrust of a spring 13 on the other hand bearing against a valve cover 14 fixed to the lateral flanges of the stator.
  • the tank 6 also has an outlet 15 for delivery.
  • the rotor is rotated in the direction indicated by arrow F by a motor (not shown) located against one of the two lateral flanges of the stator.
  • the other lateral flange 16 shown diagrammatically in FIG. 2 comprises the oil supply system for the stator. It comprises a turnstile 17. This turnstile is fixed on the rotor shaft at 18, this fixing allowing a slight rotation of the turnstile around the point 18. Furthermore, the point 18 is eccentric relative to the center 19 of the turnstile. At rest, the center 19 of the turnstile coincides with the axis of the rotor.
  • the counterbore 12 is necessary because it serves as an oil retaining bowl ensuring the tightness of the valve. This violent ejection and the little space left for the oil causes damage to the valve and the spring.
  • This groove opens into the counterbore 12 at a level very slightly higher than the bottom of this counterbore so as to allow a slight retention of oil for sealing.
  • this groove 24 extends at 25 beyond the diametrically opposite wall of the counterbore.
  • Figure 4 shows the clearance groove 24, 25 in top view.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)
  • Rotary Pumps (AREA)
  • Compressor (AREA)
  • Mechanical Sealing (AREA)
  • Lubrication Of Internal Combustion Engines (AREA)
  • Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)

Abstract

Oil-sealed vane pump has a stator and a rotor assembly housed in an oil-filled tank, said stator comprising an oil injection orifice, a suction port connected to a tank inlet pipe and a discharge port opening into said tank, said discharge port being provided with a check valve, said check valve being mounted in a spot facing in the stator and said tank further comprising a discharge outlet. The stator is provided with at least one slot opening into the spot facing.

Description

La présente invention concerne une pompe à joint d'huile à palettes.The present invention relates to a vane oil seal pump.

Une telle pompe comprend essentiellement un stator constitué par un corps comprenant un logement cylindrique dans lequel tourne d'une manière excentrée, tangentiellement à une génératrice dudit logement, un rotor également cylindrique. Le rotor porte deux palettes diamétralement opposées appliquées par des ressorts contre le stator (et par la force centrifuge). Un orifice d'aspiration et un orifice de refoulement débouchent dans le stator respectivement de part et d'autre de la génératrice de tangence du stator et du rotor. L'orifice de refoulement est muni d'une soupape anti-retour. Le siège de cette soupape est constitué par le fond d'un lamage réalisé dans le stator. l'ensemble est placé dans une cuve fermée, remplie d'huile. L'orifice d'aspiration est relié à un conduit débouchant hors de ladite cuve tandis que l'orifice de refoulement débouche dans la cuve, laquelle comporte elle-même un orifice de sortie. Une pompe comparable est connue du GB-A-1 140 452.Such a pump essentially comprises a stator constituted by a body comprising a cylindrical housing in which rotates eccentrically, tangentially to a generator of said housing, a rotor also cylindrical. The rotor carries two diametrically opposite vanes applied by springs against the stator (and by centrifugal force). A suction orifice and a discharge orifice open into the stator respectively on either side of the tangent generator of the stator and of the rotor. The discharge port is fitted with a non-return valve. The seat of this valve is formed by the bottom of a counterbore made in the stator. the assembly is placed in a closed tank, filled with oil. The suction orifice is connected to a conduit opening out of said tank while the delivery orifice opens into the tank, which itself has an outlet orifice. A comparable pump is known from GB-A-1 140 452.

L'entrée d'huile dans le stator, pour la lubrification et l'étanchéité entre les palettes et le stator et entre le rotor et sa ligne de tangence avec le stator, est réalisée par un orifice d'injection sur un flasque latéral fermant le stator. Cet orifice est muni d'un clapet de fermeture mis en mouvement alternatif d'ouverture et de fermeture, au cours du fonctionnement de la pompe, par le moyen d'un dispositif rotatif solidaire de l'axe du rotor. Ce clapet de fermeture évite l'introduction d'huile dans le stator lors des périodes d'arrêts de la pompe. Cependant, en cas de défaillance de ce dispositif et si le clapet reste ouvert lors d'une période d'arrêt de la pompe, le stator se remplit d'huile et lors du prochain démarrage de la pompe, une grosse quantité d'huile est expulsée par l'orifice de refoulement. Or, la section de passage entre la soupape, située à l'orifice de refoulement et les parois du lamage dans lequel est placée la soupape, est faible et insuffisant pour le passage d'un tel flux d'huile ce qui occasionne des détériorations de la soupape et éventuellement de son ressort : risque de déformation, coincement etc.The entry of oil into the stator, for lubrication and sealing between the vanes and the stator and between the rotor and its line of tangency with the stator, is carried out by an injection orifice on a lateral flange closing the stator. This orifice is provided with a closing valve set in alternating opening and closing movement, during the operation of the pump, by means of a rotary device secured to the axis of the rotor. This shut-off valve prevents oil from entering the stator during periods when the pump is stopped. However, in the event of a failure of this device and if the valve remains open during a pump shutdown period, the stator will fill with oil and the next time the pump is started, a large amount of oil is expelled through the discharge port. However, the passage section between the valve, located at the discharge orifice and the walls of the counterbore in which the valve is placed, is small and insufficient for the passage of such a flow of oil, which causes deterioration of the valve and possibly its spring: risk of deformation, jamming, etc.

Le lamage dont il est question plus haut-permet de réaliser une petite retenue d'huile réalisant, à l'arrêt de la pompe, l'étanchéité entre la soupape et le stator.The counterbore in question above allows a small oil retention to be achieved, making the seal between the valve and the stator when the pump stops.

- La présente invention a pour but de pallier l'inconvénient décrit ci-dessus et a pour objet une pompe à joint d'huile à palettes comprenant un stator et un rotor, l'ensemble étant situé dans une cuve fermée contenant de l'huile, le stator comportant un orifice d'injection d'huile, un orifice d'aspiration relié à une conduite débouchant hors de ladite cuve et un orifice de refoulement débouchant dans la cuve, l'orifice de refoulement étant muni d'une soupape anti-retour, ladite soupape étant logée dans un lamage réalisé dans le stator, ladite cuve comportant en outre un orifice de refoulement, caractérisée en ce que, au moins une rainure est pratiquée dans ledit stator, cette rainure débouchant dans ledit lamage.- The present invention aims to overcome the drawback described above and relates to a vane oil seal pump comprising a stator and a rotor, the assembly being located in a closed tank containing oil , the stator comprising an oil injection orifice, a suction orifice connected to a pipe opening out of said tank and a delivery orifice opening into the tank, the delivery orifice being provided with an anti-valve return, said valve being housed in a counterbore made in the stator, said tank further comprising a discharge orifice, characterized in that at least one groove is formed in said stator, this groove opening into said counterbore.

Selon une réalisation préférée de l'invention, ladite rainure débouche dans ledit lamage à un niveau très légèrement supérieur au fond dudit lamage.According to a preferred embodiment of the invention, said groove opens into said counterbore at a level very slightly higher than the bottom of said counterbore.

Selon une réalisation préférée, cette rainure part de la périphérie du stator, débouche dans ledit lamage et se prolonge au delà de la paroi diamétralement opposée du lamage.According to a preferred embodiment, this groove starts from the periphery of the stator, opens into said counterbore and extends beyond the diametrically opposite wall of the counterbore.

On va maintenant décrire un exemple de réalisation de l'invention en référence au dessin annexé dans lequel :

  • la figure 1 montre, selon une coupe perpendiculaire à l'axe de rotation, une pompe à joint d'huile à palettes ;
  • la figure 2 représente le système d'arrivée d'huile par un flasque latéral du stator ;
  • la figure 3 montre, selon une coupe perpendiculaire à l'axe de rotation, une pompe à palettes aménagée selon l'invention ;
  • la figure 4 montre en vue de dessus l'orifice de refoulement d'une pompe à palettes selon l'invention.
We will now describe an embodiment of the invention with reference to the accompanying drawing in which:
  • Figure 1 shows, in a section perpendicular to the axis of rotation, a vane oil seal pump;
  • Figure 2 shows the oil supply system by a side flange of the stator;
  • Figure 3 shows, in a section perpendicular to the axis of rotation, a vane pump arranged according to the invention;
  • Figure 4 shows a top view of the discharge port of a vane pump according to the invention.

En se reportant à la figure 1 qui montre une pompe à palettes à joint d'huile bien connue, on voit un stator 1, un rotor 2 excentré de manière à être tangent à une génératrice G du stator. Le rotor porte des palettes coulissantes 3 et 4 actionnées par des ressorts 5 et par la force centrifuge. L'ensemble est placé dans une cuve 6 pleine d'huile 7. Le stator comporte un orifice d'aspiration 8 relié à une conduite 9 débouchant hors de la cuve 6 ; il comporte en outre un orifice de refoulement 10 débouchant directement dans la cuve. Cet orifice de refoulement est muni d'une soupape antiretour 11, dont le siège est situé au fond d'un lamage 12 circulaire. La soupape 11 repose sur le fond du lamage 2 par la poussée d'un ressort 13 prenant d'autre part appui contre un capot de soupape 14 fixé aux flasques latéraux du stator. La cuve 6 comporte en outre une sortie 15 pour le refoulement.Referring to Figure 1 which shows a well known oil seal vane pump, we see a stator 1, a rotor 2 eccentric so as to be tangent to a generator G of the stator. The rotor carries sliding vanes 3 and 4 actuated by springs 5 and by centrifugal force. The assembly is placed in a tank 6 full of oil 7. The stator has a suction port 8 connected to a pipe 9 opening out of the tank 6; it further comprises a discharge orifice 10 opening directly into the tank. This discharge orifice is provided with a non-return valve 11, the seat of which is located at the bottom of a circular counterbore 12. The valve 11 rests on the bottom of the counterbore 2 by the thrust of a spring 13 on the other hand bearing against a valve cover 14 fixed to the lateral flanges of the stator. The tank 6 also has an outlet 15 for delivery.

Le rotor est entraîné en rotation dans le sens indiqué par la flèche F par un moteur non représenté situé contre l'un des deux flasques latéraux du stator. L'autre flasque latéral 16 représenté schématiquement figure 2 comporte le système d'alimentation en huile du stator. Il comprend un tourniquet 17. Ce tourniquet est fixé sur l'arbre du rotor en 18, cette fixation permettant une légère rotation du tourniquet autour du point 18. Par ailleurs, le point 18 est excentré par rapport au centre 19 du tourniquet. Au repos, le centre 19 du tourniquet coïncide avec l'axe du rotor. En rotation, la réaction de l'huile sur le tourniquet, qui comporte des pales, décentre le tourniquet par rapport à l'axe du rotor, cette décentration provoque grâce à un plot 26, une fois par tour, la poussée d'un ressort 20 auquel est lié un clapet 21 obturant un orifice 22 d'alimentation du stator. Au repos, le tourniquet reprend, à cause de son poids et de la pression du ressort sa position centrée et le ressort n' est alors plus soulevé et l'orifice 21 est fermé.The rotor is rotated in the direction indicated by arrow F by a motor (not shown) located against one of the two lateral flanges of the stator. The other lateral flange 16 shown diagrammatically in FIG. 2 comprises the oil supply system for the stator. It comprises a turnstile 17. This turnstile is fixed on the rotor shaft at 18, this fixing allowing a slight rotation of the turnstile around the point 18. Furthermore, the point 18 is eccentric relative to the center 19 of the turnstile. At rest, the center 19 of the turnstile coincides with the axis of the rotor. In rotation, the reaction of the oil on the turnstile, which has blades, offsets the turnstile relative to the axis of the rotor, this decentering causes, by a stud 26, once per turn, the thrust of a spring 20 to which is linked a valve 21 closing an orifice 22 for supplying the stator. At rest, the turnstile resumes, because of its weight and the pressure of the spring, its centered position and the spring is then no longer lifted and the orifice 21 is closed.

On comprend que si ce système d'injection est défaillant et que, par exemple, au repos l'orifice 22 n'est plus obturé, l'huile pénètre alors dans la chambre 23 (figure 1) et au prochain démarrage, cette huile est alors violemment éjectée à travers l'orifice 10. Cependant on voit que la section de passage pour l'huile est faible, d'autant plus que la course verticale de la soupape 11 est petite. Cette course est petite car en effet la longueur de la course correspond à une absence de guidage du ressort on a donc intérêt à ce qu'elle soit le plus faible possible.It is understood that if this injection system is faulty and that, for example, at rest the orifice 22 is no longer blocked, the oil then enters the chamber 23 (FIG. 1) and at the next start-up, this oil is then violently ejected through the orifice 10. However, it can be seen that the passage section for the oil is small, especially since the vertical stroke of the valve 11 is small. This stroke is small because in fact the length of the stroke corresponds to an absence of spring guiding so it is advantageous for it to be as small as possible.

Par ailleurs, le lamage 12 est nécessaire car il sert de cuvette de retenu d'huile assurant l'étanchéité de la soupape. Cette éjection violente et le peu d'espace de dégagement pour l'huile cause des détérioration à la soupape et au ressort.Furthermore, the counterbore 12 is necessary because it serves as an oil retaining bowl ensuring the tightness of the valve. This violent ejection and the little space left for the oil causes damage to the valve and the spring.

Ainsi, conformément à l'invention, et en se reportant à la figure 3, on réalise dans le stator 1 une rainure 24 débouchant dans le lamage 12. Cette rainure débouche dans le lamage 12 à un niveau très légèrement supérieur au fond de ce lamage de manière à permettre une légère retenue d'huile pour l'étanchéité. Par ailleurs, cette rainure 24 se prolonge en 25 au delà de la paroi diamétralement opposée du lamage. Comme on le comprend aisément, dès que la soupape 11 s'est légèrement soulevée, cette rainure 24-25 offre à l'huile un grand espace de dégagement et ainsi le ressort 13 et la soupape 11 travaillent dans de bien meilleures conditions et ne risquent plus de se détériorer.Thus, in accordance with the invention, and with reference to FIG. 3, there is made in the stator 1 a groove 24 opening into the counterbore 12. This groove opens into the counterbore 12 at a level very slightly higher than the bottom of this counterbore so as to allow a slight retention of oil for sealing. Furthermore, this groove 24 extends at 25 beyond the diametrically opposite wall of the counterbore. As is easily understood, as soon as the valve 11 is slightly raised, this groove 24-25 offers the oil a large clearance space and thus the spring 13 and the valve 11 work in much better conditions and do not risk more to deteriorate.

La figure 4 montre la rainure de dégagement 24, 25 en vue de dessus.Figure 4 shows the clearance groove 24, 25 in top view.

Claims (3)

1. An oil-sealed vane pump with a stator (1) and a rotor (2) both mounted in a tight oil-filled tank (6), said stator having an oil injection orifice, a suction port connected to a pipe leading to the outside of the tank, and a discharge port (10) opening into said tank, said discharge port being provided with a check valve (11), said check valve fitting into a shell (12) cut in the stator, said tank further comprising a discharge outlet, characterized in that at least one slot (24-25) is made in said stator (1), said slot opening into said shell (12).
2. A pump-as claimed in claim 1, characterized in that said slot comes into said shell at a level just slightly higher than the bottom of said shell.
3. A pump as claimed in claim 2, characterized in that said slot (24) begins at the periphery of the stator, goes through the shell (12) and extends (25) beyond the diametrically opposite wall of the shell.
EP84114285A 1983-11-30 1984-11-27 Oil-sealed vane pump Expired EP0144888B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84114285T ATE32123T1 (en) 1983-11-30 1984-11-27 OIL SEALED VANE PISTON PUMP.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8319148A FR2555674B1 (en) 1983-11-30 1983-11-30 PALLET OIL SEAL PUMP
FR8319148 1983-11-30

Publications (3)

Publication Number Publication Date
EP0144888A2 EP0144888A2 (en) 1985-06-19
EP0144888A3 EP0144888A3 (en) 1985-07-17
EP0144888B1 true EP0144888B1 (en) 1988-01-20

Family

ID=9294702

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84114285A Expired EP0144888B1 (en) 1983-11-30 1984-11-27 Oil-sealed vane pump

Country Status (7)

Country Link
US (1) US4575322A (en)
EP (1) EP0144888B1 (en)
JP (1) JPS60135688A (en)
AT (1) ATE32123T1 (en)
BG (1) BG51054A3 (en)
DE (1) DE3468919D1 (en)
FR (1) FR2555674B1 (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19526321A1 (en) * 1995-07-19 1997-01-23 Leybold Ag Oil sealed rotary vane vacuum pump with oil pump
KR100393347B1 (en) * 2000-08-17 2003-07-31 맹혁재 Apparatus for utilization of vane having two wings in fluid compression and power transformation
KR100395373B1 (en) * 2000-09-04 2003-08-21 맹혁재 compressor
ITTO20040268A1 (en) * 2004-04-30 2004-07-30 Varian Spa ROTARY OIL MECHANICAL VACUUM PUMP AND METHOD OF PRODUCTION OF THAT PUMP
KR100914241B1 (en) * 2008-12-08 2009-08-26 주식회사 신우 Vane pump device
JP2012122450A (en) * 2010-12-10 2012-06-28 Kobe Steel Ltd Screw compressor
US9212662B2 (en) * 2013-04-29 2015-12-15 Ford Global Technologies, Llc Check valve for an engine vacuum pump
US9617864B2 (en) * 2014-07-21 2017-04-11 United Technologies Corporation Seal assembly for a guide vane assembly
JP6531736B2 (en) * 2016-07-29 2019-06-19 ダイキン工業株式会社 Sea transport frozen or refrigerated container unit

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2154880A (en) * 1935-12-24 1939-04-18 Landers Frary & Clark Valve
DE661031C (en) * 1936-03-27 1938-06-09 Wolfgang Gaede Dr Suction pump with oil-covered outlet valve for generating low pressures
DE1293388B (en) * 1960-12-08 1969-04-24 Buerger Herbert Rotary piston vacuum pump with oil-sealed housing and vertical arrangement of the rotor and the shaft
GB1140452A (en) * 1966-03-16 1969-01-22 Edwards High Vacuum Int Ltd Improvements relating to liquid sealed mechanical vacuum pumps
DE2002076A1 (en) * 1970-01-19 1971-07-29 Borsig Gmbh Pressure-side valve of a rotary piston compressor
JPS5440483U (en) * 1977-08-25 1979-03-17

Also Published As

Publication number Publication date
DE3468919D1 (en) 1988-02-25
ATE32123T1 (en) 1988-02-15
FR2555674A1 (en) 1985-05-31
US4575322A (en) 1986-03-11
FR2555674B1 (en) 1986-03-28
JPS60135688A (en) 1985-07-19
EP0144888A2 (en) 1985-06-19
EP0144888A3 (en) 1985-07-17
BG51054A3 (en) 1993-01-15

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