KR20170028462A - Dual-row gear pump - Google Patents

Dual-row gear pump Download PDF

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Publication number
KR20170028462A
KR20170028462A KR1020150120794A KR20150120794A KR20170028462A KR 20170028462 A KR20170028462 A KR 20170028462A KR 1020150120794 A KR1020150120794 A KR 1020150120794A KR 20150120794 A KR20150120794 A KR 20150120794A KR 20170028462 A KR20170028462 A KR 20170028462A
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KR
South Korea
Prior art keywords
gear
housing
oil
operational oil
hydraulic oil
Prior art date
Application number
KR1020150120794A
Other languages
Korean (ko)
Inventor
하동기
Original Assignee
엑스티지(주)
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 엑스티지(주) filed Critical 엑스티지(주)
Priority to KR1020150120794A priority Critical patent/KR20170028462A/en
Publication of KR20170028462A publication Critical patent/KR20170028462A/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D5/00—Power-assisted or power-driven steering
    • B62D5/06—Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle
    • B62D5/062—Details, component parts
    • B62D5/063—Pump driven by vehicle engine
    • 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
    • F04C11/00—Combinations of two or more machines or pumps, each being of rotary-piston or oscillating-piston type; Pumping installations
    • F04C11/001—Combinations of two or more machines or pumps, each being of rotary-piston or oscillating-piston type; Pumping installations of similar working principle
    • 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
    • F04C14/00—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations
    • F04C14/02—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations specially adapted for several machines or pumps connected in series or in parallel
    • 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
    • F04C14/00—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations
    • F04C14/28—Safety arrangements; Monitoring
    • 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
    • F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
    • F04C15/0003—Sealing arrangements in rotary-piston machines or pumps
    • F04C15/0023—Axial sealings for working fluid
    • F04C15/0026—Elements specially adapted for sealing of the lateral faces of intermeshing-engagement type machines or pumps, e.g. gear machines or pumps
    • 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
    • F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
    • F04C15/0057—Driving elements, brakes, couplings, transmission specially adapted for machines or pumps
    • 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
    • F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C2/12—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type
    • F04C2/14—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons
    • F04C2/18—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with similar tooth forms
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H1/00—Toothed gearings for conveying rotary motion
    • F16H1/02—Toothed gearings for conveying rotary motion without gears having orbital motion
    • F16H1/04—Toothed gearings for conveying rotary motion without gears having orbital motion involving only two intermeshing members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/02—Gearboxes; Mounting gearing therein
    • F16H57/029—Gearboxes; Mounting gearing therein characterised by means for sealing the gearboxes, e.g. to improve airtightness

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Rotary Pumps (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)

Abstract

The present invention provides a dual-row gear pump capable of continuously and stably pumping operational oil, so as to stably supply hydraulic energy required for steering. According to the present invention, the dual-row gear pump comprises: a rotary shaft (100) receiving external rotary power to be rotated; a dual-row driving gear (210) penetrating the rotary shaft (100) into a rotary center to be coupled and rotated by rotation of the rotary shaft (100); a dual-row idler gear (220) engaged with the driving gear (210) to be rotated; two gear housings (200) having an inner diameter corresponding to an outer diameter of the driving gear (210) and the idler gear (220), and receiving the driving gear (210) and the idler gear (220); an operational oil passage housing (300) having an operational oil inlet hole (310) to receive the operational oil on one side and having an operational oil outlet hole (320) to discharge the operational oil on the other side, and interposed between the two gear housings (200); a valve housing (400) connected to one side of the gear housing, having an operational oil inlet hole (310) to receive the operational oil on one side, and having an operational oil discharge hole (320) to discharge the operational oil and an excessive oil discharge hole (410) to discharge excessive operational oil on the other side, having a relief valve (420) to discharge excessive pressure, and having a priority valve (430) to distribute and control a flowrate of the operational oil inside; and a mounting flange (500) combined with the other side gear housing (200) of the surface on which the valve housing (400) is connected, and having a rotary shaft reception hole (510) to receive the rotary shaft (100).

Description

DUAL-ROW GEAR PUMP

The present invention relates to a hydraulic gear pump which is attached to a power pack of an engine and receives a rotational power from an internal combustion engine such as an engine or an electric motor and forcibly flows a necessary flow rate to generate a force required for steering.

A typical gear pump is a pump that puts two gears that mesh with each other into a case circumscribing it and rotates the gear to flow the fluid through a space between the groove of the tooth and the peripheral wall.

Regarding this, Registration No. 10-1413694 has been disclosed.

The structure and operation principle of the gear pump will be described with reference to Figs. 1 to 3. First, the gear housing is provided with a bearing housing 1 forming an outer tube, and a gear box 2 And a casing 3 is coupled to the other side of the bearing housing 1. [

A first reduction gear 5 connected to a motor 4 via a motor (not shown) and rotated by receiving a driving force of the motor, and a second reduction gear 5 rotated in a state of being engaged with the first reduction gear. A second reduction gear 6 having a diameter larger than the diameter of the first reduction gear 5 is incorporated so that the first reduction gear 5 and the second reduction gear 6 are rotated in opposite directions .

The bearing housing 1 is provided with a first rotary gear 7 axially connected to the first reduction gear 5 and rotated by the first reduction gear 5 and a second rotary gear 7 engaged with the first rotary gear 7, A second rotary gear 8 rotating according to the rotation of the rotary gear 7 is incorporated and the first rotary gear 7 and the second rotary gear 8 are rotated in opposite directions.

A first lobe gear impeller 9 which is connected to the first rotary gear 7 and connected to the first rotary gear 7 and rotates by receiving the rotational force of the first rotary gear 7, And a second lobe gear impeller 10 engaged with the first lobe gear impeller 9 and rotatable by receiving the rotational force of the second rotary gear 8. The first lobe gear impeller 9 is rotatably supported by the first lobe gear impeller 9, And the second lobe gear impeller 10 are rotated in directions opposite to each other, and the fluid is transferred in accordance with the rotation of the first and second gear impellers 9 and 10.

A bearing that supports the shaft and smoothly rotates the shaft is coupled to the shaft of the motor and the shaft that connects the gears.

A fluid from a shaft portion rotating at high speed under a high temperature and a high pressure is introduced between the first rotary gear 7 and the first lobe gear impeller 9 and between the second rotary gear 8 and the second lobe gear impeller 10 A mechanical seal 11 is coupled to prevent leakage of the fluid.

An inlet 12 having a fluid flow path or a circular inlet hole 13 is formed on the outside of the casing 3 so as to allow the fluid to flow into the casing 3, A discharging portion 14 having a fluid passage or a circular discharge hole 15 for discharging the fluid from the inside of the casing 3 to the outside is formed on the outer side of the casing 3 as a position, And a flange portion 16 to which a pipe is coupled is formed at an end portion of the inflow portion 12 and the discharge portion 14,

In such a conventional gear pump, a power is applied to generate a rotational force while a motor (not shown) is driven to rotate the shaft 4 connected to the motor, and the rotation shaft 4 rotates the shaft 4 in the reducer box 2 The installed first reduction gear 5 is rotated.

The second reduction gear 6 engaged with the first reduction gear 5 is rotated in the direction opposite to the first reduction gear 5 in accordance with the rotation of the first reduction gear 5, The rotation speed (rpm) of the first reduction gear 5 is reduced by the second reduction gear 6 as the diameter of the first reduction gear 5 is larger than the diameter of the first reduction gear 5.

The first rotary gear 7 which is installed in the bearing housing 1 and is connected to the second reduction gear 6 in a state in which the number of rotations is reduced by the second reduction gear 6, And is rotated by receiving the rotational force.

At the same time, the second rotary gear 8 engaged with the first rotary gear 7 is also rotated along the rotating first rotary gear 7. The second rotary gear 8 is rotated by the first rotary gear 7, The first and second rotary gears 7 and 8 are rotated in opposite directions to each other.

Also, the first and second gear impellers 9 and 10, which are installed in the casing 3 and are respectively connected to the first and second rotary gears 7 and 8, are also rotated. That is, The second rotary gear 8 is axially connected to the first lobe gear impeller 9 while being axially connected to the second lobe gear impeller 10 and the first lobe gear impeller 9 and the second lobe gear impeller 10, The first lobe gear impeller 9 and the second lobe gear impeller 10 are rotated together with the first and second rotating gears 7 and 8 to be rotated, As shown in Fig.

Therefore, the fluid introduced into the casing 3 through the inflow hole 13 formed in the inflow portion 12 of the casing 3 flows into the first and second gear impellers 9 and 10, which are rotated in the meshed state, And is transported in a direction opposite to the inflow portion 12 while flowing through a space formed between the outer circumferential surface and the inner surface of the casing 3. [

The fluid transferred along the space formed between the inner surface of the casing 3 and the outer peripheral surface of the first and second gear impellers 9 and 10 is sent to the discharge hole 15 of the discharge portion 14, And is discharged to the outside of the gear pump through the discharge hole 15 while being pushed by the fluid conveyed by the first and second gear impellers 9 and 10 to be rotated.

On the other hand, the working pressure in the above-mentioned gear pump (i.e., the pressure of the fluid) is determined by the rotational speed of the gear, which is generally set at a very high pressure (170 bar) Lt; / RTI >

Therefore, excessive pressure is applied to the actuator, which may easily damage or malfunction the actuator.

To solve this problem, it is possible to add a separate pressure reducing device, but in this case, additional cost is incurred and the structure of the device becomes complicated.

KR 10-2007-7018869 KR 10-2012-0009019 KR 10-2007-0130200

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above problems of the prior art.

Specifically, it is an object of the present invention to provide a two-row gear that can be stably and continuously pumped out of a gear pump having a single structure, thereby stably supplying hydraulic energy required for steering.

In order to accomplish the above object, a two-row gear pump according to the present invention includes: a rotary shaft (100) rotated by receiving external rotational power; Two rows of driving gears 210 coupled to the rotation center through the rotation shaft 100 and rotated by the rotation of the rotation shaft 100; Two rows of idler gears 220 rotating in engagement with the driving gear 210; Two gear housings 200 having inner diameters corresponding to the outer diameters of the driving gear 210 and the idler gear 220 and accommodating the driving gear 210 and the idler gear 220; A housing 300 as an operating oil interposed between the two gear housings 200 and formed with a working oil inlet hole 310 through which the working oil flows into one side and an operating oil discharge hole 320 through which the working oil is discharged from the other side; A hydraulic oil inlet hole 310 through which the hydraulic oil is introduced into the gear housing 200 and a hydraulic oil discharge hole 320 through which the hydraulic oil is discharged to the other side of the gear housing 200 and an overflow oil discharge hole 410 through which the hydraulic oil is discharged, A valve housing (400) having a relief valve (420) for discharging excessive pressure and having a priority valve (430) for distributing and adjusting the flow rate of hydraulic oil; And a mounting flange 500 coupled to the other gear housing 200 on the side where the valve housing 400 is coupled and having a rotation shaft receiving hole 510 for receiving the rotation shaft 100. [ do.

As described above, the present invention can stably and continuously pump the operating oil due to the engagement of the two rows of the driving gear 210 and the idler gear 220 by using the rotational power transmitted from the rotating shaft 100, It has an effect that the hydraulic energy can be stably supplied.

1 is an exemplary view for explaining a conventional gear pump;
2 is an exemplary view for explaining an existing gear pump;
3 is an exemplary view for explaining a conventional gear pump;
4 is a front and rear perspective view of a two-row gear pump according to an embodiment of the present invention;
5 is a cross-sectional view of a two-row gear pump in accordance with an embodiment of the present invention;
6 is a diagram illustrating a gear operation of a two-row gear pump according to an embodiment of the present invention;

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings, but the present invention is not limited by the scope of the present invention.

Referring to FIGS. 4 and 5, the double row gear pump according to the present invention includes: a rotary shaft 100 rotated by receiving external rotational power; Two rows of driving gears 210 coupled to the rotation center through the rotation shaft 100 and rotated by the rotation of the rotation shaft 100; Two rows of idler gears 220 rotating in engagement with the driving gear 210; Two gear housings 200 having inner diameters corresponding to the outer diameters of the driving gear 210 and the idler gear 220 and accommodating the driving gear 210 and the idler gear 220; A housing 300 as an operating oil interposed between the two gear housings 200 and formed with a working oil inlet hole 310 through which the working oil flows into one side and an operating oil discharge hole 320 through which the working oil is discharged from the other side; A hydraulic oil inlet hole 310 through which the hydraulic oil is introduced into the gear housing 200 and a hydraulic oil discharge hole 320 through which the hydraulic oil is discharged to the other side of the gear housing 200 and an overflow oil discharge hole 410 through which the hydraulic oil is discharged, A valve housing (400) having a relief valve (420) for discharging excessive pressure and having a priority valve (430) for distributing and adjusting the flow rate of hydraulic oil; And a mounting flange 500 coupled to the other gear housing 200 on the side where the valve housing 400 is coupled and having a rotation shaft receiving hole 510 for receiving the rotation shaft 100. [ do.

Specifically, the present invention relates to a device for attaching to a power pack of an engine and generating a hydraulic energy required for steer by flowing a required flow rate by receiving rotational power from an internal combustion engine or an electric motor such as an engine, And the idler gear 220 engaged with the driving gear 210 is rotated at the same time as the rotation shaft 100 is received and transmitted to the two rows of driving gears 210 coupled to the rotary shaft 100, Lt; RTI ID = 0.0 > pumping < / RTI >

6, the engagement of the gears forms an operating mechanism in which the hydraulic fluid on the front surface of the gear is continuously moved to the rear surface of the gear, It is a principle that is continuously pumped.

The driving gear 210 and the idler gear 220 of the present invention are formed in the shape of a spur gear having the same tooth profile and the helical gear in which the gear is formed by a diagonal line, 'Type double helical gear can be applied.

As described above, when the driving gear 210 and the idler gear 220 are configured as a double helical gear type, unlike a normal spur gear, , The pressure is slowly applied to a wide point at a point where the pressure is applied at a narrow point, so that the pulsation is reduced.

At this time, it is preferable that the directionality of the 'V' -shaped end of the double helical gear is directed toward the pushing direction of the hydraulic oil.

6, the rotary shaft 100 is separated from each other so as to include a portion connected to the two rows of driving gears 210, rather than one single shaft, The housing 200, the hydraulic oil housing 300, the valve housing 400 and the mounting flange 500 can be separated from each other. In order to facilitate subsequent maintenance such as repairing and cleaning at the time of separation, The two shafts are not two shafts but two shafts. The shafts are coupled by a connecting shaft 110 that connects the shafts to each other.

At this time, the separated part of the separated rotary shaft 100 forms a groove for receiving the connection shaft, and the connection shaft 110 is connected to the rotary shaft 100 in order to simultaneously transmit the rotary power to the two rotary shafts. It is preferable to form grooves on the outer surface to prevent development.

Next, an oil sealing (OS) is interposed between the gear housing 200, the hydraulic oil housing 300, the valve housing 400, and the mounting flange 500 to prevent leakage of hydraulic oil. The oil sealing (OS) is made of silicon based material and the other synthetic resin material is selected to have a certain stretchability in order to prevent the high-pressure operating oil from penetrating each joint portion and flowing out to the outside desirable.

The rotating shaft receiving hole 510 of the mounting flange 500 may further include an oil bearing 520 for preventing the hydraulic oil from flowing out due to the rotation of the rotating shaft 100, A plurality of bearings may be connected in series to the rotary shaft 100 for reliable sealing and an oil seal 520 may be provided on the outer peripheral surface of the oil bearing 520 through an oil sealing .

While the present invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments.

100:
200: Two gear housings
210: Driving gear
220: idler gear
300: housing with hydraulic oil
310: hydraulic oil inflow hole
320: Oil drain hole
400: valve housing
410: Flow rate outlet
420: relief valve
430: Priority valve
500: Mounting flange
510: Rotating shaft receiving hole
520: Oil bearing

Claims (4)

A rotary shaft (100) rotated by receiving external rotational power;
Two rows of driving gears 210 coupled to the rotation center through the rotation shaft 100 and rotated by the rotation of the rotation shaft 100;
Two rows of idler gears 220 rotating in engagement with the driving gear 210;
Two gear housings 200 having inner diameters corresponding to the outer diameters of the driving gear 210 and the idler gear 220 and accommodating the driving gear 210 and the idler gear 220;
A housing 300 as an operating oil interposed between the two gear housings 200 and formed with a working oil inlet hole 310 through which the working oil flows into one side and an operating oil discharge hole 320 through which the working oil is discharged from the other side;
A hydraulic oil inlet hole 310 through which the hydraulic oil is introduced into the gear housing 200 and a hydraulic oil discharge hole 320 through which the hydraulic oil is discharged to the other side of the gear housing 200 and an overflow oil discharge hole 410 through which the hydraulic oil is discharged, A valve housing (400) having a relief valve (420) for discharging excessive pressure and having a priority valve (430) for distributing and adjusting the flow rate of hydraulic oil;
And a mounting flange 500 coupled to the other gear housing 200 on the side where the valve housing 400 is coupled and having a rotation shaft receiving hole 510 for receiving the rotation shaft 100. [ Two-row gear pump. The method according to claim 1,
The rotary shaft 100 is separated from each other so as to include a portion connected to the driving gears 210 in the two rows and is coupled to a connecting shaft 110 for connecting the separated portions to each other in a dynamic manner. Thermal gear pump. The method according to claim 1,
(OS) that prevents leakage of operating oil is interposed between the gear housing (200), the hydraulic oil housing (300), the valve housing (400), and the mounting flange (500) Pump. The method according to claim 1,
Wherein the rotary shaft receiving hole (510) of the mounting flange (500) further includes an oil bearing (520) for preventing the hydraulic oil from flowing out due to rotation of the rotary shaft (100).
KR1020150120794A 2015-08-27 2015-08-27 Dual-row gear pump KR20170028462A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020150120794A KR20170028462A (en) 2015-08-27 2015-08-27 Dual-row gear pump

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Application Number Priority Date Filing Date Title
KR1020150120794A KR20170028462A (en) 2015-08-27 2015-08-27 Dual-row gear pump

Publications (1)

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KR20170028462A true KR20170028462A (en) 2017-03-14

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108443473A (en) * 2018-04-23 2018-08-24 浙江创想节能科技有限公司 A kind of mating anti-oil leakage device for valve actuator

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20070100366A (en) 2005-01-20 2007-10-10 티알더블유 오토모티브 게엠베하 A power steering system hydraulic pump
KR100892716B1 (en) 2007-12-13 2009-04-15 현대자동차주식회사 Variable displacement pump
KR20120009019A (en) 2010-07-21 2012-02-01 지효근 Rotary Disc Pump

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20070100366A (en) 2005-01-20 2007-10-10 티알더블유 오토모티브 게엠베하 A power steering system hydraulic pump
KR100892716B1 (en) 2007-12-13 2009-04-15 현대자동차주식회사 Variable displacement pump
KR20120009019A (en) 2010-07-21 2012-02-01 지효근 Rotary Disc Pump

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108443473A (en) * 2018-04-23 2018-08-24 浙江创想节能科技有限公司 A kind of mating anti-oil leakage device for valve actuator

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