EP0065606B1 - Sliding vane for rotors of hydraulic or electrohydraulic rotary devices - Google Patents

Sliding vane for rotors of hydraulic or electrohydraulic rotary devices Download PDF

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Publication number
EP0065606B1
EP0065606B1 EP81400817A EP81400817A EP0065606B1 EP 0065606 B1 EP0065606 B1 EP 0065606B1 EP 81400817 A EP81400817 A EP 81400817A EP 81400817 A EP81400817 A EP 81400817A EP 0065606 B1 EP0065606 B1 EP 0065606B1
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EP
European Patent Office
Prior art keywords
vane
stator
application surface
pallet
exposed
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
EP81400817A
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German (de)
French (fr)
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EP0065606A1 (en
Inventor
Daniel Leroy
Patrice Charlat
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.)
Compagnie de Construction Mecanique Sulzer
Original Assignee
Compagnie de Construction Mecanique Sulzer
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 Compagnie de Construction Mecanique Sulzer filed Critical Compagnie de Construction Mecanique Sulzer
Priority to AT81400817T priority Critical patent/ATE22595T1/en
Priority to EP81400817A priority patent/EP0065606B1/en
Priority to DE8181400817T priority patent/DE3175398D1/en
Publication of EP0065606A1 publication Critical patent/EP0065606A1/en
Application granted granted Critical
Publication of EP0065606B1 publication Critical patent/EP0065606B1/en
Expired legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
    • F01C21/00—Component parts, details or accessories not provided for in groups F01C1/00 - F01C20/00
    • F01C21/08—Rotary pistons
    • F01C21/0809—Construction of vanes or vane holders

Definitions

  • the present invention relates to rotor sliding pallets of rotary hydraulic or electrohydraulic devices, which pallets are capable of coming into pallet equilibrium support or of pallet bonding support against a stator application surface.
  • the support of the sliding pallets on the stator application surface or ramp must be constant. This support is generally obtained using a pallet application means which can be constituted by a spring, a magnet or an attraction coil.
  • the present invention intends to improve the friction of each pallet on the stator application surface while keeping a constant support of the pallet on this surface, this sliding pallet having, moreover, to operate according to the two possible directions of rotation of the rotor of the device.
  • rotary hydraulic which comprises said pallet (or said pallets).
  • Flats are made in front of and behind the ridge, one of these flats being larger than the other.
  • the narrow flat constitutes a front flat.
  • the narrow flat is exposed to high pressure which forces the paddle radially inward of the rotor.
  • Another surface is produced opposite the narrow flat to constitute a means of applying the pallet against the stator surface.
  • Another surface extending laterally to the pallet allows lateral pressure to be exerted on the pallet, so as to apply it against the wall of its housing.
  • a rotary motor with radially sliding vanes which is capable of rotating in both directions.
  • the palette shows, on both sides of itself, a notch.
  • a channel allows the fluid pressure to be exerted against the pallet to "push it against the opposite wall of the housing receiving the pallet.
  • a device in which a pallet is floating in a stator housing.
  • the pallet acts radially under the action of a spring.
  • Lateral cavities are formed on the pallet and a plurality of small passages connect a cavity to the downstream cavity.
  • the high pressure is transmitted through passages to the downstream cavity of the pallet so as to balance the force exerted on the opposite cavity.
  • This provision aims to keep the pallet its floating character in a rotary device forming a pump or motor with a single direction of rotation.
  • the present invention relates to a rotor sliding pallet for rotary hydraulic devices, capable of coming into balance or pallet gluing support against a stator application surface by means of a pallet application surface exposed to the pressure of the fluid and of a spring, of symmetrical shape on either side of a median axis with on either side of it, a curved portion of contact with said stator application surface, not completely adjusted to this stator surface and releasing a curved surface also exposed to the pressure of the fluid, in axial opposition with said pallet application surface, characterized in that it is elongated along its median axis and in that this curved surface being provided for on either side of the pallet, the pallet application surface is provided, also on either side of the pallet, on a compensating portion of the pallet intended to remain outside the rotor and substantially pa aligns with the stator application surface, said pallet application surface being at least substantially equal to the curved surface so that the pallet is in equilibrium support, or even in bonding support, against the stator application surface .
  • Figure 1 is a schematic sectional view of a sliding pallet according to the invention, shown in its rotor housing and coming into pallet balance support against the stator of the device;
  • Figure 2 is a schematic sectional view, similar to that of Figure 1, in which the pallet is in abutment for gluing the pallet against the stator of the device.
  • a pallet according to the invention (1) shows a curved or rounded portion (2) of surface (S1) coming, according to a generator (G) in pallet balance contact with the stator (3) both on the upstream side (preponderant pressure HP) and on the downstream side (pressure xP). These pressures are exerted on the curved portions and tend to lift the pallet, but this tendency is immediately combated due to a compensating portion (4) of the pallet, of surface (S2), on which the fluid pressure s 'exercises substantially perpendicular to the stator application surface (3A) of the stator.
  • the surface of the compensating portion (4) of the pallet is therefore substantially parallel to said surface of stator application.
  • the pallet (1) is pierced with at least one hydraulic balancing channel (5), a pressure (x'P) then prevailing inside the pallet and the housing (6) which receives it in the rotor ( 7) with the interposition of a pallet application means (8) which, in this case, is a spring.
  • the pressures (xP) and (x'P) are lower than the pressure (HP).
  • the surfaces (S1) and (S2) are chosen equal so as to obtain the desired pallet balance.
  • the pallet (1) is provided with an additional surface (S3) exposed to pressure (HP), this surface extending laterally to the pallet and continuing inside the housing over a certain length of the palette.
  • the surface (S3) hollowed out laterally in the pallet, makes it possible to avoid any tilting of the latter under the action of the preponderant pressure (HP) in the area of the pallet normally exposed to this pressure.
  • the exercise of pressure (HP) on the lateral surface (S3) also makes it possible to establish a seal of the pallet against its housing, on a contact line (9) of these two parts, located at the edge back of the side face of the pallet, opposite to that exposed to pressure (HP).
  • the pallet is symmetrical on either side of its axis of symmetry (ZZ) so that the behavior of the pallet is the same, whether the pressure (HP) comes from one side or from the other, in relation to this axis.
  • Figure 2 shows the same characteristics and provisions as those of Figure 1, with the difference however that the surface (S2) is chosen greater than the surface (S1) so that the pallet is in bonding support against the stator application surface (3A).
  • the curved surface portion (S1) is followed by a zone or strip (10) of contact with the stator application surface (3A).
  • the contact comes down to a generator (G).
  • the balance support contact (figure 1) or the bonding support contact (figure 2) are chosen according to the possible use version of the hydraulic or electro-hydraulic rotary device considered: pump, motor, brake or retarder.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Hydraulic Motors (AREA)
  • Rotary Pumps (AREA)

Abstract

1. Sliding vane for rotors of hydraulic rotary devices susceptible to come into balanced or binding bearing engagement of the vane against an application surface of a stator (3A) by means of a vane application surface (S2) exposed to the pressure of the fluid and a spring (8), of symmetrical shape on each side of a median axis (Z-Z) with on respective sides thereof a curved portion (2) adapted for contact with said application surface (3A) of the stator, not mated completely to this surface of the stator and exposing a curved surface (S1) also exposed to the pressure of the fluid, axially opposed to said vane application surface (S2), characterized in that it is elongate along its median axis (Z-Z) and in that, this curved surface (S1) being formed on either side of the vane, the vane application surface (S2) is formed, also on either side of the vane, on a compensator portion (4) of the vane adapted to remain outside the rotor and substantially parallel to the application surface of the stator, said vane application surface (S2) being at least substantially equal to the curved surface (S1) so that the vane (1) is in balanced or binding bearing engagement with the application surface of the stator.

Description

La présente invention se rapporte aux palettes coulissantes de rotor de dispositifs hydrauliques ou électrohydrauliques rotatifs, lesquelles palettes sont susceptibles de venir en appui d'équilibre de palette ou en appui de collage de palette contre une surface d'application statorique.The present invention relates to rotor sliding pallets of rotary hydraulic or electrohydraulic devices, which pallets are capable of coming into pallet equilibrium support or of pallet bonding support against a stator application surface.

Une usure importante peut se produire entre les arêtes vives de chaque palette et la surface d'application statorique, allant jusqu'à une détérioration rapide, d'autant plus si ladite surface d'application est une rampe, les variations de profil de la rampe accentuant encore le frottement.Significant wear can occur between the sharp edges of each pallet and the stator application surface, going as far as rapid deterioration, all the more if said application surface is a ramp, the variations in profile of the ramp further accentuating the friction.

Il doit être remarqué, par ailleurs, que l'appui des palettes coulissantes sur la surface d'application statorique ou rampe doit être constant. Cet appui est généralement obtenu à l'aide d'un moyen d'application de palette qui peut être constitué par un ressort, un aimant ou une bobine d'attraction.It should also be noted that the support of the sliding pallets on the stator application surface or ramp must be constant. This support is generally obtained using a pallet application means which can be constituted by a spring, a magnet or an attraction coil.

La présente invention entend améliorer le frottement de chaque palette sur la surface d'application statorique tout en gardant un appui constant de la palette sur cette surface, cette palette coulissante devant, par ailleurs, fonctionner suivant les deux sens de rotation possibles du rotor du dispositif hydraulique rotatif qui comporte ladite palette (ou lesdites palettes).The present invention intends to improve the friction of each pallet on the stator application surface while keeping a constant support of the pallet on this surface, this sliding pallet having, moreover, to operate according to the two possible directions of rotation of the rotor of the device. rotary hydraulic which comprises said pallet (or said pallets).

On connaît un moteur ou une pompe à palettes radiales à un seul sens de rotation. Chaque palette de ce moteur ou de cette pompe montre une arête aiguë contre une surface statorique.There is known a motor or a radial vane pump with a single direction of rotation. Each pallet of this motor or pump shows a sharp edge against a stator surface.

Des méplats sont réalisés devant et derrière l'arête, l'un de ces méplats étant plus grand que l'autre.Flats are made in front of and behind the ridge, one of these flats being larger than the other.

Suivant le sens de rotation unique adopté, le méplat étroit constitue un méplat avant. Dans une zone active de fonctionnement, le méplat étroit est exposé à la haute pression ce qui force la palette radialement vers l'intérieur du rotor.Depending on the unique direction of rotation adopted, the narrow flat constitutes a front flat. In an active operating area, the narrow flat is exposed to high pressure which forces the paddle radially inward of the rotor.

Une autre surface est réalisée à l'opposé du méplat étroit pour constituer un moyen d'application de la palette contre la surface statorique.Another surface is produced opposite the narrow flat to constitute a means of applying the pallet against the stator surface.

Une autre surface s'étendant latéralement à la palette permet l'exercice d'une pression latérale sur la palette, de manière à l'appliquer contre la paroi de son logement.Another surface extending laterally to the pallet allows lateral pressure to be exerted on the pallet, so as to apply it against the wall of its housing.

Il s'agit, dans l'ensemble, d'un type connu de palette.It is, on the whole, a known type of palette.

On connaît un moteur rotatif à palettes coulissantes radialement et susceptible de tourner dans les deux sens. La palette montre, de part et d'autre d'elle-même, une entaille. Un canal permet à la pression de fluide de s'exercer contre la palette pour la « pousser contre la paroi opposée du logement recevant la palette.A rotary motor with radially sliding vanes is known which is capable of rotating in both directions. The palette shows, on both sides of itself, a notch. A channel allows the fluid pressure to be exerted against the pallet to "push it against the opposite wall of the housing receiving the pallet.

Aucune disposition n'est cependant prévue pour améliorer le frottement de la palette contre la surface statorique.No provision is however made to improve the friction of the pallet against the stator surface.

On connaît un dispositif dans lequel une palette est flottante dans un logement statorique. La palette agit radialement sous l'action d'un ressort. Des cavités latérales sont pratiquées sur la palette et une pluralité de petits passages relient une cavité à la cavité aval. En fonctionnement, la haute pression est transmise par des passages à la cavité aval de la palette de manière à équilibrer la force qui s'exerce sur la cavité opposée.A device is known in which a pallet is floating in a stator housing. The pallet acts radially under the action of a spring. Lateral cavities are formed on the pallet and a plurality of small passages connect a cavity to the downstream cavity. In operation, the high pressure is transmitted through passages to the downstream cavity of the pallet so as to balance the force exerted on the opposite cavity.

Cette disposition vise à conserver à la palette son caractère flottant dans un dispositif rotatif formant pompe ou moteur à un seul sens de rotation.This provision aims to keep the pallet its floating character in a rotary device forming a pump or motor with a single direction of rotation.

On connaît, enfin, par le brevet US-A-2778 317 un dispositif dans lequel des palettes ont un profil en forme d'ancre marine dont la partie courbe ou sabot est ajustée serré contre la paroi circonférentielle d'une chambre de travail, pour venir masquer, en cours de fonctionnement, des orifices d'entrée ou de sortie de fluide.Finally, from US Pat. No. 2,778,317, a device is known in which pallets have a profile in the form of a sea anchor, the curved part or shoe of which is fitted tight against the circumferential wall of a working chamber, for hide, during operation, fluid inlet or outlet ports.

La présente invention vise une palette coulissante de rotor pour dispositifs hydrauliques rotatifs, susceptible de venir en appui d'équilibre ou de collage de palette contre une surface statorique d'application au moyen d'une surface d'application de palette exposée à la pression du fluide et d'un ressort, de forme symétrique de part et d'autre d'un axe médian avec de part et d'autre de celui-ci, une portion courbe de contact avec ladite surface statorique d'application, non ajustée complètement à cette surface statorique et dégageant une surface courbe également exposée à la pression du fluide, en opposition axiale avec ladite surface d'application de palette, caractérisée en ce qu'elle est allongée selon son axe médian et en ce que cette surface courbe étant ménagée de part et d'autre de la palette, la surface d'application de palette est ménagée, également de part et d'autre de la palette, sur une portion compensatrice de la palette destinée à rester hors du rotor et sensiblement parallèle à la surface statorique d'application, ladite surface d'application de palette étant au moins sensiblement égale à la surface courbe de sorte que la palette est en appui d'équilibre, voire en appui de collage, contre la surface statorique d'application.The present invention relates to a rotor sliding pallet for rotary hydraulic devices, capable of coming into balance or pallet gluing support against a stator application surface by means of a pallet application surface exposed to the pressure of the fluid and of a spring, of symmetrical shape on either side of a median axis with on either side of it, a curved portion of contact with said stator application surface, not completely adjusted to this stator surface and releasing a curved surface also exposed to the pressure of the fluid, in axial opposition with said pallet application surface, characterized in that it is elongated along its median axis and in that this curved surface being provided for on either side of the pallet, the pallet application surface is provided, also on either side of the pallet, on a compensating portion of the pallet intended to remain outside the rotor and substantially pa aligns with the stator application surface, said pallet application surface being at least substantially equal to the curved surface so that the pallet is in equilibrium support, or even in bonding support, against the stator application surface .

D'autres caractéristiques et avantages de la présente invention ressortiront de la description qui va suivre faite en regard du dessin sur lequel :Other characteristics and advantages of the present invention will emerge from the description which follows, given with reference to the drawing in which:

la figure 1 est une vue en coupe schématique d'une palette coulissante selon l'invention, représentée dans son logement rotorique et venant en appui d'équilibre de palette contre le stator du dispositif ; etFigure 1 is a schematic sectional view of a sliding pallet according to the invention, shown in its rotor housing and coming into pallet balance support against the stator of the device; and

la figure 2 est une vue en coupe schématique, semblable à celle de la figure 1, dans laquelle la palette est en appui de collage de palette contre le stator du dispositif.Figure 2 is a schematic sectional view, similar to that of Figure 1, in which the pallet is in abutment for gluing the pallet against the stator of the device.

Dans la forme de réalisation représentée à la figure 1, une palette selon l'invention (1) montre une portion courbe ou arrondie (2) de surface (S1) venant, suivant une génératrice (G) en contact d'équilibre de palette avec le stator (3) aussi bien du côté amont (pression prépondérante HP) que du côté aval (pression xP). Ces pressions s'exercent sur les portions courbes et ont tendance à soulever la palette, mais cette tendance est immédiatement combattue du fait d'une portion compensatrice (4) de la palette, de surface (S2), sur laquelle la pression de fluide s'exerce sensiblement perpendiculairement à la surface d'application statorique (3A) du stator. La surface de la portion compensatrice (4) de la palette est donc sensiblement parallèle à ladite surface d'application statorique.In the embodiment represented in FIG. 1, a pallet according to the invention (1) shows a curved or rounded portion (2) of surface (S1) coming, according to a generator (G) in pallet balance contact with the stator (3) both on the upstream side (preponderant pressure HP) and on the downstream side (pressure xP). These pressures are exerted on the curved portions and tend to lift the pallet, but this tendency is immediately combated due to a compensating portion (4) of the pallet, of surface (S2), on which the fluid pressure s 'exercises substantially perpendicular to the stator application surface (3A) of the stator. The surface of the compensating portion (4) of the pallet is therefore substantially parallel to said surface of stator application.

La palette (1) est percée d'au moins un canal d'équilibrage hydraulique (5), une pression (x'P) régnant alors à l'intérieur de la palette et du logement (6) qui la reçoit dans le rotor (7) avec interposition d'un moyen d'application de palette (8) qui, en l'occurrence, est un ressort. Les pressions (xP) et (x'P) sont inférieures à la pression (HP).The pallet (1) is pierced with at least one hydraulic balancing channel (5), a pressure (x'P) then prevailing inside the pallet and the housing (6) which receives it in the rotor ( 7) with the interposition of a pallet application means (8) which, in this case, is a spring. The pressures (xP) and (x'P) are lower than the pressure (HP).

Dans la forme de réalisation représentée à la figure 1, les surfaces (S1) et (S2) sont choisies égales de manière à obtenir l'équilibre de palette recherché.In the embodiment shown in Figure 1, the surfaces (S1) and (S2) are chosen equal so as to obtain the desired pallet balance.

Par ailleurs, la palette (1) est pourvue d'une surface supplémentaire (S3) exposée à la pression (HP), cette surface s'étendant latéralement à la palette et se poursuivant à l'intérieur du logement sur une certaine longueur de la palette. La surface (S3), creusée latéralement dans la palette, permet d'éviter tout basculement de celle-ci sous l'action de la pression prépondérante (HP) dans la zone de la palette normalement exposée à cette pression. L'exercice de la pression (HP) sur la surface latérale (S3) permet, de plus, d'établir une étanchéité de la palette contre son logement, sur une ligne de contact (9) de ces deux pièces, se situant en arête arrière de la face latérale de la palette, opposée à celle exposée à la pression (HP).Furthermore, the pallet (1) is provided with an additional surface (S3) exposed to pressure (HP), this surface extending laterally to the pallet and continuing inside the housing over a certain length of the palette. The surface (S3), hollowed out laterally in the pallet, makes it possible to avoid any tilting of the latter under the action of the preponderant pressure (HP) in the area of the pallet normally exposed to this pressure. The exercise of pressure (HP) on the lateral surface (S3) also makes it possible to establish a seal of the pallet against its housing, on a contact line (9) of these two parts, located at the edge back of the side face of the pallet, opposite to that exposed to pressure (HP).

Il doit être remarqué que la palette est symétrique de part et d'autre de son axe de symétrie (Z-Z) de sorte que le comportement de la palette soit le même, que la pression (HP) vienne d'un côté ou de l'autre, par rapport à cet axe.It should be noted that the pallet is symmetrical on either side of its axis of symmetry (ZZ) so that the behavior of the pallet is the same, whether the pressure (HP) comes from one side or from the other, in relation to this axis.

La forme de réalisation de la figure 2 montre les mêmes caractéristiques et dispositions que celles de la figure 1, à la différence toutefois que la surface (S2) est choisie supérieure à la surface (S1) de sorte que la palette soit en appui de collage contre la surface d'application statorique (3A).The embodiment of Figure 2 shows the same characteristics and provisions as those of Figure 1, with the difference however that the surface (S2) is chosen greater than the surface (S1) so that the pallet is in bonding support against the stator application surface (3A).

En vue d'obtenir un contact satisfaisant d'appui de collage, la portion courbe de surface (S1) est suivie d'une zone ou bandeau (10) de contact avec la surface d'application statorique (3A). On a vu que dans la forme de réalisation de la figure 1 le contact se résume à une génératrice (G).In order to obtain a satisfactory bonding contact, the curved surface portion (S1) is followed by a zone or strip (10) of contact with the stator application surface (3A). We have seen that in the embodiment of FIG. 1, the contact comes down to a generator (G).

Le contact d'appui d'équilibre (figure 1) ou le contact d'appui de collage (figure 2) sont choisis en fonction de la version d'utilisation possible du dispositif hydraulique ou électrohydraulique rotatif considéré : version pompe, moteur, frein ou ralentisseur.The balance support contact (figure 1) or the bonding support contact (figure 2) are chosen according to the possible use version of the hydraulic or electro-hydraulic rotary device considered: pump, motor, brake or retarder.

Claims (5)

1. Sliding vane for rotors of hydraulic rotary devices susceptible to come into balanced or ' binding bearing engagement of the vane against an application surface of a stator (3A) by means of a vane application surface (S2) exposed to the pressure of the fluid and a spring (8), of symmetrical shape on each side of a median axis (Z-Z) with on respective sides thereof a curved portion (2) adapted for contact with said application surface (3A) of the stator, not mated completely to this surface of the stator and exposing a curved surface (S1) also exposed to the pressure of the fluid, axially opposed to said vane application surface (S2), characterized in that it is elongate along its median axis (Z-Z) and in that, this curved surface (S1) being formed on either side of the vane, the vane application surface (S2) is formed, also on either side of the vane, on a compensator portion (4) of the vane adapted to remain outside the rotor and substantially parallel to the appiica- tion surface of the stator, said vane application surface (S2) being at least substantially equal to the curved surface (S1) so that the vane (1) is in balanced or binding bearing engagement with the application surface of the stator.
2. Sliding vane according to claim 1, characterized in that the vane has on each of its two sides a surface (S3) hollowed out so as to continue inside the housing (6) over a certain length while leaving a non-hollowed out rear part of the vane, which side surface (S3) exposed to the dominant pressure makes it possible to establish a seal between the vane and its housing on a contact line (9) at the rear edge of the'side of the vane opposite that exposed to the dominant pressure.
3. Sliding vane according to claim 1, characterized in that the vane is in balanced bearing engagement with the application surface of the stator along a generatrix (G).
4. Sliding vane according to claim 1, characterized in that the vane is in binding bearing engagement with the application surface of the stator over an area or strip (10).
5. Sliding vane according to any one of claims 1 to 4, characterized in that there is at least one hydraulic balancing channel (5) extending through it.
EP81400817A 1981-05-22 1981-05-22 Sliding vane for rotors of hydraulic or electrohydraulic rotary devices Expired EP0065606B1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
AT81400817T ATE22595T1 (en) 1981-05-22 1981-05-22 SLIDING SLIDES FOR ROTORS OF HYDRAULIC OR ELECTRO-HYDRAULIC ROTARY PISTON SYSTEMS.
EP81400817A EP0065606B1 (en) 1981-05-22 1981-05-22 Sliding vane for rotors of hydraulic or electrohydraulic rotary devices
DE8181400817T DE3175398D1 (en) 1981-05-22 1981-05-22 Sliding vane for rotors of hydraulic or electrohydraulic rotary devices

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP81400817A EP0065606B1 (en) 1981-05-22 1981-05-22 Sliding vane for rotors of hydraulic or electrohydraulic rotary devices

Publications (2)

Publication Number Publication Date
EP0065606A1 EP0065606A1 (en) 1982-12-01
EP0065606B1 true EP0065606B1 (en) 1986-10-01

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EP81400817A Expired EP0065606B1 (en) 1981-05-22 1981-05-22 Sliding vane for rotors of hydraulic or electrohydraulic rotary devices

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AT (1) ATE22595T1 (en)
DE (1) DE3175398D1 (en)

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US4792295A (en) * 1987-03-05 1988-12-20 Joyce Sr Benjamin N Variable volume rotary vane pump-motor units
US8955491B2 (en) * 2005-03-09 2015-02-17 Merton W. Pekrul Rotary engine vane head method and apparatus
US8915726B2 (en) * 2012-02-08 2014-12-23 Shining Golden Yida Welding & Cutting Machinery Manufacture Ltd. Rotary vane air motor with improved vanes and other improvements

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US2778317A (en) * 1954-10-25 1957-01-22 Cockburn David Hamilton Rotary fluid pressure pumps and motors of the eccentric vane type
US2873683A (en) * 1956-06-05 1959-02-17 Farmingdale Corp Floating non-sticking blades
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Publication number Publication date
ATE22595T1 (en) 1986-10-15
DE3175398D1 (en) 1986-11-06
EP0065606A1 (en) 1982-12-01

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