CN101865173A - Hydraulic motor control valve - Google Patents
Hydraulic motor control valve Download PDFInfo
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- CN101865173A CN101865173A CN 201010232586 CN201010232586A CN101865173A CN 101865173 A CN101865173 A CN 101865173A CN 201010232586 CN201010232586 CN 201010232586 CN 201010232586 A CN201010232586 A CN 201010232586A CN 101865173 A CN101865173 A CN 101865173A
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- 239000007788 liquid Substances 0.000 claims abstract description 95
- 230000009471 action Effects 0.000 claims abstract description 6
- 239000012530 fluid Substances 0.000 claims description 29
- 230000002441 reversible effect Effects 0.000 claims description 14
- 230000008859 change Effects 0.000 claims description 5
- 239000002828 fuel tank Substances 0.000 claims description 3
- 238000000034 method Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 7
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 210000003811 finger Anatomy 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 210000003813 thumb Anatomy 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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Abstract
The invention relates to a hydraulic motor control valve. The hydraulic motor control valve comprises a two-way locking loop, a control loop, a control assembly and a main valve body, wherein the control loop controls the action of a brake of a hydraulic motor; the control assembly consists of a main valve core and a pilot valve which controls the main valve core to feed or return liquid; two main oil ports are working ports of the main valve core respectively; the pilot valve and the liquid inlet of the main valve core are respectively communicated with a main liquid inlet; the pilot valve and the liquid returning port of the main valve core are respectively communicated with a main liquid returning port; and a working port of the pilot valve is communicated with a control port of a corresponding main valve core. The invention provides a hydraulic motor control valve which is controlled by a small moment and can restore the brake to a braking state rapidly.
Description
Technical field
The present invention relates to a kind of hydraulic motor control valve, specifically, be a kind of use in the tight catenary system of scraper conveyor, control oil hydraulic motor clockwise and anticlockwise action hydraulic motor control valve.
Background technique
Oil hydraulic motor and hydraulic motor control valve Chang Yitong are used for various engineering equipments, the control of oil hydraulic motor being rotated and braking by hydraulic motor control valve, thereby reach the purpose of the various engineering equipment actions of control, Chinese patent literature CN101649849A has proposed a kind of brake circuit of hydraulic motor, it comprises brake circuit, and it also comprises the control loop that has commutation and the effect of locking oil circuit concurrently that is made of 3-position-3-way pilot operated directional control valve, one-way valve one, one-way valve two, one-way valve seven, one-way valve eight.The prior art can guarantee that at first power oil can drive the oil hydraulic motor running reliably; Then, in the loop, be provided with the control loop that has commutation and the effect of locking oil circuit concurrently, realized automatically locking of loop, played the effect that when shutting down, also can protect pump, hydraulic element etc.; At the uniform velocity walk when the prior art can make the crawler crane descending, can under action of gravity, not give it the gun, avoid occurring out-of-control phenomenon.In use also there is following shortcoming in the prior art: 1, do not put down in writing in the prior art towards A hydraulic fluid port (B hydraulic fluid port) interior fuel feeding or oil return by control, thereby realize that oil hydraulic motor just changes, the control unit of counter-rotating and braking, and the normal control unit that uses is a three-position four-way valve in the present prior art, manual three-position four-way valve is being used for the bigger occasion of load, as when being used for the control of the scraper conveyor under the mine, regular meeting the handle place occurs and need use very big moment just can break the problem that active handle is realized control off with the fingers and thumb, and the three-position four-way valve of electromagnetism is unsuitable for applying under the space-constrained mine, has potential safety hazard easily; 2, in the prior art, break can not return to braking state rapidly, mainly is because the liquid in the break must be through reduction valve, shuttle valve, discharge by main liquid entering hole at last, in the process of whole discharge, can meet resistance and cause liquid not discharge rapidly; 3, the control loop that has commutation and the effect of locking oil circuit concurrently in the prior art is made of 3-position-3-way pilot operated directional control valve, one-way valve one, one-way valve two, one-way valve seven, one-way valve eight, complex structure not only, and it is bigger to take up room, and has reduced the compactedness of whole brake circuit.
Summary of the invention
For this reason; technical problem to be solved by this invention be hydraulic motor control valve of the prior art in that to be used for load bigger; when needing to use the occasion of manually control; regular meeting the handle place occurs and need use very big moment just can break the problem that active handle is realized control off with the fingers and thumb, and a kind of hydraulic motor control valve of little Torque Control is provided.
A kind of hydraulic motor control valve that can make break return to braking state rapidly further is provided.
For solving the problems of the technologies described above, a kind of hydraulic motor control valve of the present invention comprises
The reversible lock loop circuit, two liquid entering holes of described reversible lock loop circuit are communicated with the main hydraulic fluid port of two feed flows/time liquid respectively, two working holes of described reversible lock loop circuit are communicated with the just commentaries on classics working hole and the counter-rotating working hole of oil hydraulic motor respectively, when described main hydraulic fluid port stopped feed flow, described reversible lock loop circuit can lock the liquid in the oil hydraulic motor;
Brake circuit, described brake circuit comprises shuttle valve, two liquid entering holes of described shuttle valve are communicated with two described main hydraulic fluid ports respectively, and the liquid outlet of described shuttle valve is communicated with described break working hole, by feed flow in the break of oil hydraulic motor or make the outside drainage of break control the action of described break;
Control unit, described control unit by controlling two described main hydraulic fluid ports feed flow or return the braking that liquid comes the control brake device, and the clockwise and anticlockwise of oil hydraulic motor;
Main valve body, form in the described main valve body described reversible lock loop circuit is set, the inner chamber of described brake circuit and described control unit, and form the suitable break working interface that is connected with the break working hole of oil hydraulic motor on the relevant position of described main valve body outer wall, with oil hydraulic motor just change hydraulic fluid port, just changing a job of being connected of counter-rotating hydraulic fluid port made interface, counter-rotating working interface, and the main feed liquor interface that is communicated with fuel tank, leads back liquid interface;
Described control unit is made of the pilot valve that main valve plug and control main valve plug advance, return liquid, two described main hydraulic fluid ports are respectively the working hole of described main valve plug, the liquid entering hole of described pilot valve and described main valve plug is communicated with main liquid entering hole respectively, the liquid return hole of described pilot valve and described main valve plug is communicated with main liquid return hole respectively, and the working hole of described pilot valve is communicated with the control mouth of corresponding described main valve plug.
Above-mentioned hydraulic motor control valve, described control unit has two covers, and the described pilot valve of described control unit is the two-position three way manually operated valve, and described main valve plug is the two-position three way hydraulic control valve, and two described main hydraulic fluid ports are respectively the working hole of two described main valve plugs.
Above-mentioned hydraulic motor control valve, also comprise a single control mangetic core assembly on the described brake circuit, described single control mangetic core assembly is the two-position three way hydraulic control valve, the liquid entering hole of described single control mangetic core assembly and control mouth communicate with the described liquid outlet of described shuttle valve, the working hole of described single control mangetic core assembly communicates with described break working hole, the drainage case that the liquid return hole of described single control mangetic core assembly directly communicates with atmosphere communicates, and enters in the described drainage case by the leakage hole that is molded on the described main valve body outer wall relevant position.
Above-mentioned hydraulic motor control valve, described reversible lock loop circuit is the double hydraulic control one-way valve.
Above-mentioned hydraulic motor control valve is provided with pressure gauge between the working hole of described single control mangetic core assembly and the working hole of described break, forms pressure gauge connection on the relevant position of described main valve body outer wall.
Above-mentioned hydraulic motor control valve is provided with filter between the liquid entering hole of described pilot valve and the described main liquid entering hole, is provided with one-way valve between the liquid return hole of described pilot valve and the described main liquid return hole, also is provided with safety valve on the described main liquid entering hole.
Technique scheme of the present invention has the following advantages compared to existing technology, 1, the control unit that constitutes of pilot valve and main valve plug, in that to be used for load bigger, and during the occasion of manually control, easily thereby operating grip realization is effortlessly just changeed-is braked, the process of counter-rotating-braking; 2, the direct drainage case that communicates with atmosphere of the liquid return hole of single control mangetic core assembly communicates, non-resistance when making back the liquid discharge of liquid, thus the break that can realize oil hydraulic motor returns to braking state rapidly, has reduced the potential safety hazard that exists because of braking retardation.
Description of drawings
For the easier quilt of content of the present invention is clearly understood, below according to a particular embodiment of the invention and in conjunction with the accompanying drawings, the present invention is further detailed explanation, wherein
Fig. 1 is the schematic diagram of hydraulic motor control valve of the present invention;
Fig. 2 is the plan view of hydraulic motor control valve of the present invention;
Fig. 3 is the worm's eye view of hydraulic motor control valve of the present invention;
Fig. 4 is the plan view of hydraulic motor control valve of the present invention.
Reference character is expressed as among the figure: 1-oil hydraulic motor, 2-break, 3-shuttle valve, 4-main valve body, 5-break working interface, 6-are just changing a job and are making interface, 7-counter-rotating working interface, 8-master's feed liquor interface, 9-master and return liquid interface, 10-main valve plug, 11-pilot valve, the single control of 12-mangetic core assembly, 13-double hydraulic control one-way valve, 14-pressure gauge, 15-pressure gauge connection, 16-filter, 17-one-way valve, 18-safety valve, 19-leakage hole.
Embodiment
As shown in Figures 1 to 4, a kind of hydraulic motor control valve of present embodiment comprises the reversible lock loop circuit, brake circuit, and control unit, main valve body 4, in the present embodiment, described reversible lock loop circuit is a double hydraulic control one-way valve 13.Two liquid entering holes of described double hydraulic control one-way valve 13 are communicated with the main hydraulic fluid port of two feed flows/time liquid respectively, two working holes of described double hydraulic control one-way valve 13 are communicated with the just commentaries on classics working hole and the counter-rotating working hole of oil hydraulic motor 1 respectively, when described main hydraulic fluid port stopped feed flow, described double hydraulic control one-way valve 13 can lock the liquid in the oil hydraulic motor 1; Described brake circuit comprises shuttle valve 3, two liquid entering holes of described shuttle valve 3 are communicated with two described main hydraulic fluid ports respectively, the liquid outlet of described shuttle valve 3 is communicated with described break 2 working holes, by feed flows in the break 2 of oil hydraulic motor 1 or make break 2 outside drainages control described break 2 to move; Described control unit by controlling two described main hydraulic fluid ports feed flow or return the braking that liquid comes control brake device 2, and the clockwise and anticlockwise of oil hydraulic motor 1; Form in the described main valve body 4 described double hydraulic control one-way valve 13 is set, the inner chamber of described brake circuit and described control unit, and form the suitable break working interface 5 that is connected with break 2 working holes of oil hydraulic motor 1 on the relevant position of described main valve body 4 outer walls, with oil hydraulic motor 1 just change hydraulic fluid port, just changing a job of being connected of counter-rotating hydraulic fluid port made interface 6, counter-rotating working interface 7, and the main feed liquor interface 8 that is communicated with fuel tank, leads back liquid interface 9; Described control unit is made of the pilot valve 11 that main valve plug 10 and control main valve plug 10 advance, return liquid, two described main hydraulic fluid ports are respectively the working hole of described main valve plug 10, the liquid entering hole of described pilot valve 11 and described main valve plug 10 is communicated with main liquid entering hole respectively, the liquid return hole of described pilot valve 11 and described main valve plug 10 is communicated with main liquid return hole respectively, and the working hole of described pilot valve 11 is communicated with the control mouth of corresponding described main valve plug 10.In the present embodiment, described control unit has two covers, and the described pilot valve of described control unit is the two-position three way manually operated valve, and described main valve plug is the two-position three way hydraulic control valve, and two described main hydraulic fluid ports are respectively the working hole of two described main valve plugs 10.The control unit that described pilot valve 11 and described main valve plug 10 constitutes, in that to be used for load bigger, and during the occasion of manually control, can be easily effortlessly operating grip realize just changeing-brake the process of counter-rotating-braking.Also comprise a single control mangetic core assembly 12 on the described brake circuit, described single control mangetic core assembly 12 is the two-position three way hydraulic control valve, the liquid entering hole of described single control mangetic core assembly 12 and control mouth communicate with the described liquid outlet of described shuttle valve 3, the working hole of described single control mangetic core assembly 12 communicates with described break 2 working holes, the drainage case that the liquid return hole of described single control mangetic core assembly 12 directly communicates with atmosphere communicates, and enters in the described drainage case by the leakage hole 19 that is molded on the described main valve body 4 outer wall relevant positions.The drainage case that the liquid return hole of described single control mangetic core assembly 12 directly communicates with atmosphere communicates, non-resistance when making back the liquid discharge of liquid, thereby the break that can realize oil hydraulic motor returns to braking state rapidly, has reduced the potential safety hazard that exists because of braking retardation.Be provided with pressure gauge 14 between the working hole of described single control mangetic core assembly 12 and the working hole of described break 2, form pressure gauge connection 15 on the relevant position of described main valve body 4 outer walls.Be provided with filter 16 between the liquid entering hole of described pilot valve 11 and the described main liquid entering hole, be provided with one-way valve 17 between the liquid return hole of described pilot valve 11 and the described main liquid return hole, also be provided with safety valve 18 on the described main liquid entering hole.
The working procedure of hydraulic motor control valve of the present invention:
(1) control the working procedure that oil hydraulic motor just changes-brakes:
When oil hydraulic motor 1 need just change, handle of pulling that cover pilot valve 11 that control just changeing was to just changeing self-locking position, and first drain enters the control mouth of main valve plug 10, thereby made the admission chamber and the valve core channel connection of main valve plug 10.The highly pressurised liquid of main liquid entering hole p is gone out from valve core channel through the admission chamber of main valve plug 10, is divided into two-way liquid in valve core channel.One the road enters into the liquid entering hole of shuttle valve 3 one ends, the steel ball of shuttle valve 3 is lived the liquid entering hole of the other end at the effect lower seal of highly pressurised liquid, highly pressurised liquid is entered into the admission chamber of single control mangetic core assembly 12 by shuttle valve 3 liquid outlets, highly pressurised liquid enters the control mouth of single control mangetic core assembly 12 simultaneously, makes the admission chamber of single control mangetic core assembly and valve core channel be communicated with.Highly pressurised liquid enters in the break of oil hydraulic motor through the admission chamber of single control mangetic core assembly 12, makes the oil hydraulic motor break separate, thereby but makes oil hydraulic motor be in working state.And another road highly pressurised liquid enters into the admission chamber of one of them Pilot operated check valve of just changeing of control of double hydraulic control one-way valve 13, the Pilot operated check valve that highly pressurised liquid is just changeing through control go out the just commentaries on classics hydraulic fluid port that sap cavity enters oil hydraulic motor; Simultaneously high pressure liquid enters into the Pilot operated check valve control mouthful of another control inversion of double hydraulic control one-way valve 13, make this control inversion Pilot operated check valve go out sap cavity and admission chamber is in connected state.Because the break of oil hydraulic motor 1 is opened, the highly pressurised liquid that enters oil hydraulic motor and just changeing hydraulic fluid port makes oil hydraulic motor 1 carry out the forward running.And oppositely the liquid of hydraulic fluid port goes out the UNICOM of sap cavity to admission chamber by the Pilot operated check valve by control inversion, enters into the liquid return hole of oil hydraulic motor integrated control valve.
After oil hydraulic motor 1 is finished turn and done, need stop operating, turn back the handle of the pilot valve 11 that control just changeing, make it be in off working state.Elder generation's drain stops to main valve plug 10 control chamber feed flows, and main valve plug 11 resets under the effect of spring and hydraulic coupling, and spool and valve seat are in sealing state, and highly pressurised liquid stops feed flow.Single control mangetic core assembly 12 control chamber highly pressurised liquids stop feed flow, and at the active force of spring force and hydraulic coupling, spool and valve seat are in sealing state.This moment, break was communicated with the sap cavity that returns of single control mangetic core assembly 11, returned liquid liquid and discharged from leakage hole.Simultaneously, the spool of double hydraulic control one-way valve 12 resets under the effect of spring force and hydraulic coupling, and so far break recovers the braking to oil hydraulic motor 1, makes oil hydraulic motor 1 be in the state of stopping operating.
(2) working procedure of control oil hydraulic motor counter-rotating-braking:
When needs oil hydraulic motor 1 counter-rotating, the handle of pilot valve 11 of pulling another set of control inversion is to the self-locking position that reverses, and working principle is with above-mentioned.
Obviously, the foregoing description only is for example clearly is described, and is not the qualification to mode of execution.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here need not also can't give exhaustive to all mode of executions.And conspicuous variation of being extended out thus or change still are among the protection domain of the invention.
Claims (6)
1. a hydraulic motor control valve comprises
The reversible lock loop circuit, two liquid entering holes of described reversible lock loop circuit are communicated with the main hydraulic fluid port of two feed flows/time liquid respectively, two working holes of described reversible lock loop circuit are communicated with the just commentaries on classics working hole and the counter-rotating working hole of oil hydraulic motor (1) respectively, when described main hydraulic fluid port stopped feed flow, described reversible lock loop circuit can lock the liquid in the oil hydraulic motor (1);
Brake circuit, described brake circuit comprises shuttle valve (3), two liquid entering holes of described shuttle valve (3) are communicated with two described main hydraulic fluid ports respectively, the liquid outlet of described shuttle valve (3) is communicated with described break (2) working hole, by towards the interior feed flow of break (2) of oil hydraulic motor (1) or make break (2) outwards drainage control described break (2) action;
Control unit, described control unit by controlling two described main hydraulic fluid ports feed flow or return the braking that liquid comes control brake device (2), and the clockwise and anticlockwise of oil hydraulic motor (1);
Main valve body (4), form in the described main valve body (4) described reversible lock loop circuit is set, the inner chamber of described brake circuit and described control unit, and form the suitable break working interface (5) that is connected with break (2) working hole of oil hydraulic motor (1) on the relevant position of described main valve body (4) outer wall, with oil hydraulic motor (1) just change hydraulic fluid port, just changing a job of being connected of counter-rotating hydraulic fluid port made interface (6), counter-rotating working interface (7), and the main feed liquor interface (8) that is communicated with fuel tank, leads back liquid interface (9);
It is characterized in that:
Described control unit is made of the pilot valve (11) that main valve plug (10) and control main valve plug (10) advance, return liquid, two described main hydraulic fluid ports are respectively the working hole of described main valve plug (10), the liquid entering hole of described pilot valve (11) and described main valve plug (10) is communicated with main liquid entering hole respectively, the liquid return hole of described pilot valve (11) and described main valve plug (10) is communicated with main liquid return hole respectively, and the working hole of described pilot valve (11) is communicated with the control mouth of corresponding described main valve plug (10).
2. hydraulic motor control valve according to claim 1, it is characterized in that: described control unit has two covers, and the described pilot valve of described control unit is the two-position three way manually operated valve, described main valve plug is the two-position three way hydraulic control valve, and two described main hydraulic fluid ports are respectively the working hole of two described main valve plugs (10).
3. hydraulic motor control valve according to claim 1 and 2, it is characterized in that: also comprise a single control mangetic core assembly (12) on the described brake circuit, described single control mangetic core assembly (12) is the two-position three way hydraulic control valve, the liquid entering hole of described single control mangetic core assembly (12) and control mouth communicate with the described liquid outlet of described shuttle valve (3), the working hole of described single control mangetic core assembly (12) communicates with described break (2) working hole, the drainage case that the liquid return hole of described single control mangetic core assembly (12) directly communicates with atmosphere communicates, and goes in the described drainage case by the leakage hole (19) that is molded on described main valve body (4) the outer wall relevant position.
4. hydraulic motor control valve according to claim 3 is characterized in that: described reversible lock loop circuit is double hydraulic control one-way valve (13).
5. hydraulic motor control valve according to claim 4, it is characterized in that: be provided with pressure gauge (14) between the working hole of described single control mangetic core assembly (12) and the working hole of described break (2), form pressure gauge connection (15) on the relevant position of described main valve body (4) outer wall.
6. hydraulic motor control valve according to claim 5, it is characterized in that: be provided with filter (16) between the liquid entering hole of described pilot valve (11) and the described main liquid entering hole, be provided with one-way valve (17) between the liquid return hole of described pilot valve (11) and the described main liquid return hole, also be provided with safety valve (18) on the described main liquid entering hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102325866A CN101865173B (en) | 2010-07-21 | 2010-07-21 | Hydraulic motor control valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102325866A CN101865173B (en) | 2010-07-21 | 2010-07-21 | Hydraulic motor control valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101865173A true CN101865173A (en) | 2010-10-20 |
| CN101865173B CN101865173B (en) | 2012-11-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010102325866A Active CN101865173B (en) | 2010-07-21 | 2010-07-21 | Hydraulic motor control valve |
Country Status (1)
| Country | Link |
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| CN (1) | CN101865173B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109654255A (en) * | 2017-10-11 | 2019-04-19 | 中国航发西安动力控制科技有限公司 | A kind of two-way pilot-operated type pressure-regulating valve |
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| JPS62200004A (en) * | 1986-02-26 | 1987-09-03 | Yutani Juko Kk | Control circuit of hydraulic motor for driving rotating structure |
| JPH0218139A (en) * | 1988-07-05 | 1990-01-22 | Komatsu Ltd | Parking brake controlling device for traveling hydraulic motor |
| CN1183137A (en) * | 1995-03-24 | 1998-05-27 | 株式会社小松制作所 | Driving device for hydraulic motor |
| JP2000240789A (en) * | 1999-02-18 | 2000-09-05 | Mitsubishi Heavy Ind Ltd | Power transmitting device for vehicle |
| CN1766350A (en) * | 2004-10-29 | 2006-05-03 | 索尔-丹福斯股份有限公司 | Valve arrangement |
| CN100387851C (en) * | 2004-05-04 | 2008-05-14 | 沃尔沃建造设备控股（瑞典）有限公司 | Hydraulic control valve having holding valve with improved response characteristics |
| CN101251133A (en) * | 2008-03-19 | 2008-08-27 | 康凤明 | Novel hydraulic motor transmission control valve group |
| CN201228364Y (en) * | 2008-06-25 | 2009-04-29 | 三一重型装备有限公司 | Hydraulic device for controlling mechanical boring machine star wheel movement and walking motor fill oil |
| CN201309736Y (en) * | 2008-09-27 | 2009-09-16 | 三一重型装备有限公司 | Motor tension chain control system |
| CN101649849A (en) * | 2008-08-14 | 2010-02-17 | 陈庆桐 | Hydraulic motor brake circuit |
| CN201714732U (en) * | 2010-07-21 | 2011-01-19 | 胡斌杰 | Hydraulic motor control valve |
-
2010
- 2010-07-21 CN CN2010102325866A patent/CN101865173B/en active Active
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85103931A (en) * | 1985-05-03 | 1986-10-29 | 维克斯公司 | Actuating unit |
| JPS62200004A (en) * | 1986-02-26 | 1987-09-03 | Yutani Juko Kk | Control circuit of hydraulic motor for driving rotating structure |
| JPH0218139A (en) * | 1988-07-05 | 1990-01-22 | Komatsu Ltd | Parking brake controlling device for traveling hydraulic motor |
| CN1183137A (en) * | 1995-03-24 | 1998-05-27 | 株式会社小松制作所 | Driving device for hydraulic motor |
| JP2000240789A (en) * | 1999-02-18 | 2000-09-05 | Mitsubishi Heavy Ind Ltd | Power transmitting device for vehicle |
| CN100387851C (en) * | 2004-05-04 | 2008-05-14 | 沃尔沃建造设备控股（瑞典）有限公司 | Hydraulic control valve having holding valve with improved response characteristics |
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| CN101251133A (en) * | 2008-03-19 | 2008-08-27 | 康凤明 | Novel hydraulic motor transmission control valve group |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109654255A (en) * | 2017-10-11 | 2019-04-19 | 中国航发西安动力控制科技有限公司 | A kind of two-way pilot-operated type pressure-regulating valve |
| CN109654255B (en) * | 2017-10-11 | 2020-06-09 | 中国航发西安动力控制科技有限公司 | Bidirectional pilot pressure regulating valve |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101865173B (en) | 2012-11-21 |
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Application publication date: 20101020 Assignee: Valve Machinery Group Co., Ltd. Assignor: Anhui Fan'er Electrohydraulic Technology Co., Ltd. Contract record no.: 2012340000393 Denomination of invention: Hydraulic motor control valve Granted publication date: 20121121 License type: Exclusive License Record date: 20121231 |
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Effective date of registration: 20130416 Address after: 241100 Anhui Province, Wuhu City Economic Development Zone, Wuhu Patentee after: Valve Machinery Group Co., Ltd. Address before: 325600 second industrial zone, seven Li port, Zhejiang, Yueqing, China Patentee before: Anhui Fan'er Electrohydraulic Technology Co., Ltd. |