CN104100521A - Improved blade type hydraulic pump and motor - Google Patents
Improved blade type hydraulic pump and motor Download PDFInfo
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- CN104100521A CN104100521A CN201410234189.0A CN201410234189A CN104100521A CN 104100521 A CN104100521 A CN 104100521A CN 201410234189 A CN201410234189 A CN 201410234189A CN 104100521 A CN104100521 A CN 104100521A
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Abstract
The invention discloses an improved blade type hydraulic pump and a motor. The improved blade type hydraulic pump and the motor comprise a rotor rotated on a transmission shaft and provided with a plurality of radial grooves, blades slipped along the radial grooves, a stator arranged outside the rotor and cooperating with the rotor, and side plates mounted at the two ends of the rotor. A high-pressure cavity and a low-pressure cavity are formed in the side plates; the top ends of the blades are contacted with the inner surface of the stator; control cavities are formed between the bottoms of the blades and the radial grooves of the rotor; in the each cycle of rotation of the rotor, the blades are slipped inside and outside along the radial grooves to cause the volume variation of lower cavities of the blades so as to form at least one volume expansion section control cavity and at least one volume shrinkage section control cavity; a leakage recovery cavity and a leakage discharge cavity are formed in the side plates; the leakage recovery cavity is communicated with the volume expansion section control cavity, and is communicated with the high-pressure cavity via a flow passage through a control valve; and the leakage discharge cavity is communicated with the volume shrinkage section control cavity, and is communicated with the high-pressure cavity through a small hole. The leakage recovery structure provided improves the volume efficiency and the performance and durability of hydraulic machines.
Description
Technical field
The present invention relates to hydraulic machinery technical field, especially relate to improved vane hydraulic machinery, particularly improved blade hydraulic pump and motor.
Background technique
Blade hydraulic pump or oil hydraulic motor, conventionally formed by rotor, blade, stator, side plate etc., between rotor and the end face of side plate, there is certain interval, under higher fluid pressure, fluid can cause fluid leakage by this gap, thereby the volumetric efficiency that reduces hydraulic machinery, causes energy dissipation.
Chinese patent literature (the day for announcing: on June 8th, 1994, notification number: CN 2168098Y) a kind of cam rotor vane pump with hydraulic floating side plate disclosed, this pump adopts hydraulic floating side plate, by the effect of high pressure oil, can compensate the axial clearance causing because of wearing and tearing between rotor and pressure side plate, oil distribution casing, keep higher volumetric efficiency; Runner in the pump housing is bright road, makes sand removal easy, cleans thoroughly clean.
Chinese patent literature (the day for announcing: on July 10th, 2002, notification number: CN1357682) a kind of rotary displacement oil hydraulic pump and motor disclosed, by the hinged oscillating vane of periphery of solid of rotation, the rotor that suit follow-up ring forms, is furnished with follow-up ring sliding bearing by inner chamber, the stator of rotor-end axle sliding bearing member is sealed formation complete machine, wherein, the axle center of follow-up ring bearing is quantitative hydraulic pump and motor with respect to the fixing eccentric setting in rotor revolution axle center, the axle center of follow-up ring bearing is volume adjustable hydraulic pump and motor with respect to the throw of eccentric continuously controllable in rotor revolution axle center.
Technique scheme is also the improvement of carrying out for improving volumetric efficiency, but certain end clearance is necessary in normal operation, still exists larger end clearance to leak under elevated pressures, will cause objective loss in efficiency.
Summary of the invention
The object of the invention is to exist fluid leakage, volumetric efficiency impact low, liquid body medium to cause the performance of hydraulic machinery and serviceability the problem such as cannot further improve in order to solve prior art middle period chip hydraulic machinery, and provide a kind of simple in structure, easily manufactured, can effectively solve fluid leakage problem, significantly improve volumetric efficiency, can be widely used in improved blade hydraulic pump and the motor of the vane hydraulic machinery under various ambient conditions.
The present invention realizes the technological scheme that its technical purpose adopts: improved blade hydraulic pump and motor, be included in the rotor that is provided with some radial grooves rotating on transmission shaft, the blade that radially groove slides, the stator that is arranged on rotor exterior and coordinates with rotor, be arranged on the side plate of two ends of rotor, described side plate is provided with hyperbaric chamber and low-pressure cavity, respective pump motor is respectively influent stream low-pressure cavity and goes out to flow low-pressure cavity, blade tip contacts with stator inner surface, formation control chamber between blade and rotor radial groove, in the every revolution of rotor, blade radially groove passes in and out slippage and formation control chamber volume-variation, form at least one volume enlarged section control chamber and at least one volume and dwindle section control chamber, on described side plate, be provided with and leak recovery chamber and leak discharge side, described leakage recovery chamber communicates with volume enlarged section control chamber, and be communicated with hyperbaric chamber by control valve through runner or through runner with go out to flow low-pressure cavity and be communicated with, described leakage discharge side dwindles section blade cavity of resorption with volume and communicates, and be communicated with hyperbaric chamber by aperture.This improved blade hydraulic pump and motor, leak recovery chamber and leak discharge side by arranging on the end face coordinating with rotor at side plate, leak recovery chamber and leak discharge side and communicate with corresponding control chamber respectively, leak that recovery chamber communicates with hyperbaric chamber by control valve or direct with go out to flow low-pressure cavity and communicate, leaking discharge side communicates with hyperbaric chamber through aperture, thereby utilize the volume expansion process of control chamber to reclaim leak fluid, utilize its volume process of dwindling that the leak fluid of recovery is expelled to hyperbaric chamber, make the fluid that leak impeller side plate end clearance significantly be reclaimed and become effective hydraulic energy, realize the raising of volumetric efficiency, simultaneously, the setting of control valve and aperture, make blade more reasonable to the pressure of stator, performance and the serviceability of hydraulic machinery are effectively improved.This improved blade hydraulic pump and motor, while not only making vane hydraulic machinery for medium viscosity oil medium, can significantly reduce energy dissipation, and make vane hydraulic machinery expand using scope, while making it be applied in low viscosity medium, high aqueous medium and aqueous medium, all there is higher transmission efficiency, and can improve its pressure under above-mentioned ambient condition.Meanwhile, this improved blade hydraulic pump and motor, simple in structure, easily manufactured.
As preferably, described leakage recovery chamber is directly communicated with or is communicated with and forms through via hole by the kidney slot that is arranged on the accumulator tank on side plate end face and be communicated with volume enlarged section control chamber, leaks recovery chamber and blocks with influent stream low-pressure cavity.Leak recovery chamber and select to be formed by the accumulator tank and the kidney slot connection that are arranged on side plate end face, the fluid of realizing leaking carries out the object effectively reclaiming.Certainly, under some blade structure, when accumulator tank is directly communicated with kidney slot inconvenience, can adopt via hole to be connected.
As preferably, described leakage recovery chamber is interconnected and is formed by two symmetrically arranged accumulator tanks and two symmetrically arranged kidney slots, described accumulator tank and kidney slot concentric arrange, leak recovery chamber and be communicated with or communicate with going out to flow low-pressure cavity with hyperbaric chamber by control valve, block with influent stream low-pressure cavity.For pump, leak recovery chamber and be communicated with hyperbaric chamber by control valve, obstructed with influent stream low-pressure cavity; For motor, leak recovery chamber and be communicated with hyperbaric chamber by control valve, or direct with go out to flow low-pressure cavity and communicate.It is easily manufactured that leakage recovery chamber is set to such structure, and fluid recovery is effective.
Preferred as the second, described leakage recovery chamber comprises symmetrically arranged two groups of concentric, and each group is made up of a kidney slot and two accumulator tank connections that are arranged on kidney slot two ends respectively, between two groups of leakage recovery chambeies, cuts off.Leak recovery chamber and also can be set to two groups, and be not communicated with mutually in the middle of two groups of leakage recovery chambeies, such structure can meet recovery fluid equally, improves the object of volumetric efficiency.
Preferred as the third, described leakage recovery chamber comprises symmetrically arranged two groups of concentric, and each group is communicated with and is formed by an arc accumulator tank and a kidney slot respectively, between two groups of leakage recovery chambeies, cuts off.This structure similar with the second situation, leak and reclaim the setting of cavity configuration, can, according to the difference of concrete hydraulic machinery, arrange accordingly, as long as meet reclaim the object of fluid can.
Preferred as another kind, described leakage recovery chamber is communicated with and forms by being communicated with cavity between kidney slot and side plate and rotor and the transmission shaft of volume enlarged section control chamber, cavity and the blocking-up of influent stream low-pressure cavity, and cavity is provided with sealing surface along transmission shaft two ends.Leak recovery chamber also can be by arranging cavity between side plate and rotor and axle, and this cavity is communicated with and forms with kidney slot, and this structure needs side plate and between centers that sealing surface is set, and realizes axial sealing.The low pressure that sealing surface can make to have in cavity certain pressure is set, and other position on transmission shaft is not exerted an influence as the normal work of outside framework oil seal etc.High-pressure liquid is the main path of vane hydraulic machinery volumetric efficiency loss to the low-pressure cavity leakage in axle week through rotor and side plate end clearance, this leak fluid is reclaimed and can significantly improve volumetric efficiency, and the hydrodynamic pressure that leaks recovery chamber is lower, also little through the loss of clearance leakage.
As preferably, the sealing surface at described cavity place is formed by transmission shaft and side plate Spielpassung, or forms by lining is set between transmission shaft and side plate.Sealing surface can adopt axle and side plate Spielpassung to realize, and also can realize by lining is set between axle and side plate.
As preferably, described control valve be arranged on runner or control valve external through passage, described control valve is decompression type control valve.Control valve can be arranged on this hydraulic machinery runner that should hydraulic machinery, also can be external separately by passage, to ensure the stable less hydrodynamic pressure of blade cavity of resorption, make blade reliably contact work with stator, can control again the wearing and tearing that excess pressure causes.
The invention has the beneficial effects as follows: this improved blade hydraulic pump and motor, by leakage recovery structure being set in hydraulic machinery inside, make significantly to be reclaimed and become effective hydraulic energy by the fluid of rotor and the leakage of side plate end clearance, significantly improve volumetric efficiency, can be widely used in single blade, double-leaf, step blades, primary and secondary blade, in the vane hydraulic machineries such as pin blade, and make hydraulic machinery in, under low viscosity ambient condition, all there is greater efficiency, and the design of control valve and aperture, make blade more reasonable to the pressure of stator, performance and the serviceability of hydraulic machinery are effectively improved.This improved blade hydraulic pump and motor, simple in structure, easily manufactured, effect is remarkable.
Brief description of the drawings
Fig. 1 is a kind of structural representation of the improved blade hydraulic pump of the present invention and motor;
Fig. 2 is a kind of structural representation that leaks recovery chamber in the present invention;
Fig. 3 leaks a kind of structural representation that recovery chamber arranges by via hole in the present invention;
Fig. 4 is the second structural representation that leaks recovery chamber in the present invention;
Fig. 5 is the third structural representation that leaks recovery chamber in the present invention;
Fig. 6 is the second structural representation of the improved blade hydraulic pump of the present invention and motor;
Fig. 7 is a kind of structural representation that leaks recovery chamber in the improved blade hydraulic pump of Fig. 6 and motor;
In figure: 1, transmission shaft, 2, radial groove, 3, rotor, 4, blade, 5, stator, 6, side plate, 7, hyperbaric chamber, 8, low-pressure cavity, 9, control chamber, 10, volume enlarged section control chamber, 11, volume dwindles section control chamber, 12, leak recovery chamber, 13, leak discharge side, 14, runner, 15, control valve, 16, aperture, 17, accumulator tank, 18, kidney slot, 19, cavity, 20, sealing surface, 21, via hole, 22, influent stream low-pressure cavity, 23, go out to flow low-pressure cavity.
Embodiment
Also by reference to the accompanying drawings technological scheme of the present invention is described in further detail below by specific embodiment.
Embodiment 1:
In the embodiment shown in fig. 1, improved blade hydraulic pump and motor, be included in the rotor that is provided with some radial grooves 23 of rotation on transmission shaft 1, the blade 4 that radially groove 2 slides, be arranged on the stator 5 that rotor 3 is outside and coordinate with rotor 3, be arranged on the side plate 6 at rotor 3 two ends, side plate 6 is provided with hyperbaric chamber 7 and low-pressure cavity 8, respective pump motor is respectively influent stream low-pressure cavity 22 and goes out to flow low-pressure cavity 23, blade 4 tops contact with stator 5 internal surfaces, formation control chamber 9 between blade 4 and rotor radial groove 2, in the every revolution of rotor 3, blade 4 radially groove 2 passes in and out slippage and formation control chamber volume-variation, become at least one volume enlarged section control chamber 10 and at least one volume to dwindle section control chamber 11, on side plate 6, be provided with and leak recovery chamber 12 and leak discharge side 13, leaking recovery chamber 12 communicates with volume enlarged section control chamber 10, and be communicated with hyperbaric chamber 7 by control valve 15 through runner 14 or through runner 14 with go out to flow low-pressure cavity 23 and be communicated with, leakage discharge side 13 dwindles section blade cavity of resorption 11 with volume and communicates, and be communicated with hyperbaric chamber 7 by aperture 16.Control valve 15 is external through passage, and control valve 15 is decompression type control valve.Leaking recovery chamber 12 is communicated with and is formed (see figure 2) by the kidney slot 18 that is arranged on the accumulator tank 17 on side plate 6 interior edge faces and be communicated with volume enlarged section control chamber 10.Leak recovery chamber 12 and also can be communicated with and form through via hole 21 by the kidney slot 18 that is arranged on the accumulator tank 17 on side plate 6 end faces and be communicated with volume enlarged section control chamber 10, leak recovery chamber 12 and block (see figure 3) with influent stream low-pressure cavity 22.Leaking recovery chamber 12 is interconnected and is formed by two symmetrically arranged accumulator tanks 17 and two symmetrically arranged kidney slots 18, accumulator tank 17 and kidney slot 18 concentric settings.Leak recovery chamber 12 and be communicated with hyperbaric chamber 7 by control valve 15 or communicate with going out to flow low-pressure cavity 23, block with influent stream low-pressure cavity 22.For pump, leak recovery chamber 12 and be communicated with hyperbaric chamber 7 by control valve 15, do not communicate with influent stream low-pressure cavity 22; For motor, leak recovery chamber 12 and be communicated with hyperbaric chamber 7 by control valve 15, or with go out to flow low-pressure cavity 23 and communicate.
Embodiment 2:
In the embodiment shown in fig. 4, improved blade hydraulic pump and motor, substantially the same manner as Example 1, difference is: leak recovery chamber 12 and comprise symmetrically arranged two groups of concentric, each group is made up of a kidney slot 18 and two accumulator tank 17 connections that are arranged on kidney slot 18 two ends respectively, and two groups leak partition between recovery chambeies 12.
Embodiment 3:
In the embodiment shown in fig. 5, improved blade hydraulic pump and motor, substantially the same manner as Example 1, difference is: leak recovery chamber 12 and comprise symmetrically arranged two groups of concentric, each group is communicated with and is formed by an arc accumulator tank 17 and a kidney slot 18 respectively, and two groups leak partition between recovery chamber 12.
Embodiment 4:
In the embodiment shown in fig. 6, improved blade hydraulic pump and motor, be included in the rotor that is provided with some radial grooves 23 of rotation on transmission shaft 1, the blade 4 that radially groove 2 slides, be arranged on the stator 5 that rotor 3 is outside and coordinate with rotor 3, be arranged on the side plate 6 at rotor 3 two ends, described side plate 6 is provided with hyperbaric chamber 7 and low-pressure cavity 8, respective pump motor is respectively influent stream low-pressure cavity 22 and goes out to flow low-pressure cavity 23, blade 4 tops contact with stator 5 internal surfaces, formation control chamber 9 between blade 4 and rotor radial groove 2, in the every revolution of rotor 3, blade 4 radially groove 2 passes in and out slippage and formation control chamber volume-variation, become at least one volume enlarged section control chamber 10 and at least one volume to dwindle section control chamber 11, on side plate 6, be provided with and leak recovery chamber 12 and leak discharge side 13, leaking recovery chamber 12 communicates with volume enlarged section control chamber 10, and be communicated with hyperbaric chamber 7 by control valve 15 through runner 14 or through runner 14 with go out to flow low-pressure cavity 23 and be communicated with, leakage discharge side 13 dwindles section blade cavity of resorption 11 with volume and communicates, and be communicated with hyperbaric chamber 7 by aperture 16.Control valve 15 is arranged on runner 14, and control valve 15 is decompression type control valve.
Leaking recovery chamber 12 is communicated with and is formed (see figure 7) by the cavity 19 between kidney slot 18 and side plate 6 and rotor 3 and the transmission shaft 1 of connection volume enlarged section control chamber 10, cavity 19 is blocked with influent stream low-pressure cavity 22, and cavity 19 is provided with sealing surface 20 along transmission shaft 1 two ends.The low pressure that sealing surface 20 can make to have in cavity 19 certain pressure is set, thereby other position on transmission shaft is not exerted an influence as the normal work of outside framework oil seal etc.The sealing surface 20 at cavity 19 places is formed by transmission shaft 1 and side plate 6 Spielpassung, or lining formation is set between transmission shaft 1 and side plate 6.In the present embodiment, sealing surface 20 adopts Spielpassung to form by transmission shaft 1 and side plate 6.
In the working procedure of vane hydraulic machinery, high-pressure liquid is the main path of vane hydraulic machinery volumetric efficiency loss through rotor and the leakage of side plate end clearance Xiang Zhouzhou low-pressure chamber, this leak fluid is reclaimed and can significantly improve volumetric efficiency, and the hydrodynamic pressure that leaks recovery chamber is lower, also little through the loss of clearance leakage.Control valve is set to ensure the stable less hydrodynamic pressure of control chamber, makes blade reliably contact work with stator, and control the wearing and tearing that excess pressure causes.
Technological scheme shown in above-described embodiment, leak recovery chamber and leak discharge side by being provided with on side plate, and communicate with corresponding control chamber respectively, leaking recovery chamber communicates with hyperbaric chamber by control valve, leaking discharge side communicates with hyperbaric chamber through aperture, thereby the volume expansion process of utilizing control chamber reclaims leak fluid and the leak fluid of recovery is expelled to hyperbaric chamber by its volume process of dwindling, realize the raising of volumetric efficiency, utilize the effect of control valve and aperture to make blade more reasonable to the pressure of stator, to improve performance and the serviceability of hydraulic machinery simultaneously.The leakage recovery structure that the inside of this technological scheme middle period chip hydraulic machinery arranges, the fluid that leaks rotor and side plate end clearance is significantly reclaimed and become effective hydraulic energy, significantly improve volumetric efficiency, this leakage recovery structure, while not only making vane hydraulic machinery be used in medium viscosity oil medium, can significantly reduce energy dissipation, also make vane hydraulic machinery expand using scope, make it in the time of low viscosity medium, high aqueous medium and aqueous medium, all there is higher transmission efficiency, and can improve its pressure under above-mentioned ambient condition.This invention effect is remarkable, realizes easily, easily manufactured.Can be widely used in the vane hydraulic machineries such as single blade, double-leaf, step blades, primary and secondary blade, pin blade.
Claims (8)
1. improved blade hydraulic pump and motor, be included in the rotor that is provided with some radial grooves (2) (3) of the upper rotation of transmission shaft (1), the blade (4) that radially groove (2) slides, be arranged on the stator (5) that rotor (3) is outside and coordinate with rotor (3), be arranged on the side plate (6) at rotor (3) two ends, described side plate (6) is provided with hyperbaric chamber (7) and low-pressure cavity (8), respective pump motor is respectively influent stream low-pressure cavity (22) and goes out to flow low-pressure cavity (23), blade (4) top contacts with stator (5) internal surface, formation control chamber (9) between blade (4) and rotor radial groove (2), in the every revolution of rotor (3), blade (4) radially groove (2) passes in and out slippage and formation control chamber volume-variation, form at least one volume enlarged section control chamber (10) and at least one volume and dwindle section control chamber (11), it is characterized in that: on described side plate (6), be provided with and leak recovery chamber (12) and leak discharge side (13), described leakage recovery chamber (12) communicates with volume enlarged section control chamber (10), and be communicated with hyperbaric chamber (7) by control valve (15) through runner (14) or through runner (14) with go out to flow low-pressure cavity (23) and be communicated with, described leakage discharge side (13) dwindles section blade cavity of resorption (11) with volume and communicates, and be communicated with hyperbaric chamber (7) by aperture (16).
2. improved blade hydraulic pump according to claim 1 and motor, it is characterized in that: described leakage recovery chamber (12) is directly communicated with by the kidney slot (18) that is arranged on the accumulator tank (17) on side plate (6) side plate end face and be communicated with volume enlarged section control chamber (10) or is communicated with and forms through via hole (21), leak recovery chamber (12) and influent stream low-pressure cavity (22) blocking-up.
3. improved blade hydraulic pump according to claim 2 and motor, it is characterized in that: described leakage recovery chamber (12) is by two symmetrically arranged accumulator tanks (17) and two symmetrically arranged kidney slots (18) formation that is interconnected, described accumulator tank (17) and kidney slot (18) concentric setting, leak recovery chamber (12) and be communicated with or communicate with going out to flow low-pressure cavity (23) with hyperbaric chamber (7) by control valve (15), block with influent stream low-pressure cavity (22).
4. improved blade hydraulic pump according to claim 2 and motor, it is characterized in that: described leakage recovery chamber (12) comprises symmetrically arranged two groups of concentric, each group is communicated with formation by a kidney slot (18) and two accumulator tanks (17) that are arranged on kidney slot (18) two ends respectively, and two groups leak partition between recovery chambeies (12).
5. improved blade hydraulic pump according to claim 2 and motor, it is characterized in that: described leakage recovery chamber (12) comprises symmetrically arranged two groups of concentric, each group is communicated with and is formed by an arc accumulator tank (17) and a kidney slot (18) respectively, and two groups leak partition between recovery chamber (12).
6. improved blade hydraulic pump according to claim 1 and motor, it is characterized in that: described leakage recovery chamber (12) is communicated with and is formed by the cavity (19) between kidney slot (18) and side plate (6) and rotor (3) and the transmission shaft (1) of connection volume enlarged section control chamber (10), cavity (19) and influent stream low-pressure cavity (22) blocking-up, cavity (19) is provided with sealing surface (20) along transmission shaft (1) two ends.
7. improved blade hydraulic pump according to claim 6 and motor, it is characterized in that: the sealing surface (20) that described cavity (19) is located is formed by transmission shaft (1) and side plate (6) Spielpassung, or form by lining is set between transmission shaft (1) and side plate (6).
8. according to improved blade hydraulic pump and motor described in claim 1 or 2 or 3 or 4 or 5 or 6 or 7, it is characterized in that: control valve (15) be arranged on that runner (14) is upper or control valve (15) is external through passage, described control valve (15) is decompression type control valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410234189.0A CN104100521B (en) | 2014-05-30 | 2014-05-30 | Improved blade hydraulic pump and motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410234189.0A CN104100521B (en) | 2014-05-30 | 2014-05-30 | Improved blade hydraulic pump and motor |
Publications (2)
| Publication Number | Publication Date |
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| CN104100521A true CN104100521A (en) | 2014-10-15 |
| CN104100521B CN104100521B (en) | 2017-03-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410234189.0A Active CN104100521B (en) | 2014-05-30 | 2014-05-30 | Improved blade hydraulic pump and motor |
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| CN (1) | CN104100521B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105840412A (en) * | 2016-05-23 | 2016-08-10 | 王向军 | Cam rotor hydraulic motor for distributing oil in abdominal cavity |
| CN106917746A (en) * | 2015-12-25 | 2017-07-04 | 株式会社昭和 | Vane pump apparatus |
| CN109927419A (en) * | 2019-03-05 | 2019-06-25 | 杭州科雷机电工业有限公司 | A kind of spiral groove type ink-suuplying pump |
| WO2022251989A1 (en) * | 2021-05-30 | 2022-12-08 | 台州弘一液压伺服科技有限公司 | Multi-acting vane-type hydraulic motor for use in heavy machinery |
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| CN203925998U (en) * | 2014-05-30 | 2014-11-05 | 胡凯 | A kind of improved blade hydraulic pump and motor |
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| JPS57186658A (en) * | 1981-05-13 | 1982-11-17 | Nissan Motor Co Ltd | Hydraulic oil pump for automatic speed change gear |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106917746A (en) * | 2015-12-25 | 2017-07-04 | 株式会社昭和 | Vane pump apparatus |
| US10451062B2 (en) | 2015-12-25 | 2019-10-22 | Showa Corporation | Vane pump device |
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| CN105840412B (en) * | 2016-05-23 | 2017-11-10 | 王向军 | A kind of cam follower hydraulic motor of abdominal cavity with oil |
| CN109927419A (en) * | 2019-03-05 | 2019-06-25 | 杭州科雷机电工业有限公司 | A kind of spiral groove type ink-suuplying pump |
| CN109927419B (en) * | 2019-03-05 | 2024-04-19 | 杭州科雷机电工业有限公司 | Spiral groove type ink supply pump |
| WO2022251989A1 (en) * | 2021-05-30 | 2022-12-08 | 台州弘一液压伺服科技有限公司 | Multi-acting vane-type hydraulic motor for use in heavy machinery |
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