CN101871478B - Loading device of hydraulic motor test board - Google Patents
Loading device of hydraulic motor test board Download PDFInfo
- Publication number
- CN101871478B CN101871478B CN2010102256870A CN201010225687A CN101871478B CN 101871478 B CN101871478 B CN 101871478B CN 2010102256870 A CN2010102256870 A CN 2010102256870A CN 201010225687 A CN201010225687 A CN 201010225687A CN 101871478 B CN101871478 B CN 101871478B
- Authority
- CN
- China
- Prior art keywords
- valve
- motor
- test
- pressure
- oil
- 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.)
- Active
Links
- 238000012360 testing method Methods 0.000 title claims abstract description 80
- 230000008878 coupling Effects 0.000 claims abstract description 5
- 238000010168 coupling process Methods 0.000 claims abstract description 5
- 238000005859 coupling reaction Methods 0.000 claims abstract description 5
- 239000002828 fuel tank Substances 0.000 claims description 14
- 239000012530 fluid Substances 0.000 claims description 6
- 230000015572 biosynthetic process Effects 0.000 claims description 4
- 239000002243 precursor Substances 0.000 claims description 3
- 239000003921 oil Substances 0.000 abstract description 40
- 239000006247 magnetic powder Substances 0.000 abstract description 6
- 238000005265 energy consumption Methods 0.000 abstract description 4
- 239000010705 motor oil Substances 0.000 abstract description 4
- 239000000945 filler Substances 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000000470 constituent Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Landscapes
- Fluid-Pressure Circuits (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
Abstract
The invention relates to a loading device of a hydraulic motor test board, which is characterized in that a high-pressure oil pump which is connected with an oil tank is connected with an electro-hydraulic reversing valve, a bi-direction retaining throttling valve and a test motor oil inlet through a high-pressure filter and an oil inlet retaining valve, a test motor oil outlet forms a test loop with an oil return retaining valve and an oil return filter oil return box after being connected with a remote counterbalance overflow valve, a flow-rate sensor, through the bi-direction retaining throttling valve and an electro-hydraulic reversing valve oil outlet. A loader is formed by joining a loading motor and a testing motor respectively with a rotation speed torque instrument through a coupling joint, at the same time, a low-pressure pump which is connected with the oil tank enters two ends of the loading motor through two retaining valves, the testing motor rotates to drive the loading motor to rotate, the oil outlet retaining valve is automatically closed, and the outlet oil forms a loading circuit through the counterbalance overflow valve, the remote overflow valve, the oil return retaining valve and the oil return filter oil return box. The loading motor is used for substituting an original magnetic powder loader, so the size is greatly reduced, the energy consumption is reduced, the remote control adjustment is convenient for test personnel to work, the loading force is large, torque of 60000 N.m can be tested, the testing range is wide, and the practicability is strong.
Description
Technical field
The present invention relates to the important component part in a kind of hydraulic motor test board, the deceleration loading device of the hydraulic motor test board that particularly output loading is used as the test motor.
Background technique
For guaranteeing quality of product, must carry out testing property to every oil hydraulic motor before oil hydraulic motor dispatches from the factory, test like pressure, flow, moment of torsion, rotating speed, performance etc., reaching designing requirement is that acceptable product just can dispatch from the factory.
Existing manufacturer adopts the output loading of magnetic powder brake as the test motor in test, and magnetic powder brake is according to electromagnetic principle with utilize magnetic transmitting torque, magnetic powder brake to be connected with the test block oil hydraulic motor; Its constituent elements is many, volume is big, energy consumption is high, cost is high, repair difficult, and it has exciting curent and transmitting torque is linear basically, and the stabilized current supply that needs specialized factory's production is as its power supply of specially joining; Stuck phenomenon appears in the course of the work easily; Powerful magnetic powder brake also needs water cooling, so adopt the output loading of magnetic powder brake as the test motor, cost is high; Maintenance cost is higher, and practicability is not good.
Summary of the invention
Technical problem to be solved by this invention is: a kind of deceleration loading device of hydraulic motor test board is provided, adopts the deceleration loading device of this structure, can measure power, the moment of torsion of different capacity oil hydraulic motor; Test specification is big; Utilization area is wide, and it is simple in structure, and energy consumption is low; Maintenance cost is lower, and practicability is good.
The present invention addresses the above problem the technological scheme that is adopted: the deceleration loading device of hydraulic motor test board; Comprise that high pressure oil that the high pressure oil pump that is connected with fuel tank gets is through high pressure filter, in line check valve; Get into electro-hydraulic reversing valve, Double throttle check valve and test motor, then from the oil outlet of test motor through the oil outlet of Double throttle check valve, electro-hydraulic reversing valve and main long-range relief valve, main back pressure relief valve, main flow sensor is connected after return check valve, return filter are got back to fuel tank formation test loop; Also include loader in addition, described loader is linked into an integrated entity through shaft coupling and rotational speed and torque appearance respectively by the main shaft that loads motor, test motor and constitutes; Low pressure pump through being connected with fuel tank gets into the two ends that load motor through two one-way valves; The two ends that load motor also are parallel with back pressure relief valve, long-range relief valve; When the test motor begins to rotate; The two loading one-way valves that load the motor two ends can be closed one automatically, and the outlet fluid process of loading motor loads the back pressure relief valve at the two ends of motor, long-range relief valve is got back to fuel tank through return check valve, return filter and constituted the loading loop.
Said low pressure pump is a low pressure gear pump, and the oil outlet place also is connected with an one-way valve and relief valve.
Said in line check valve, return check valve place are connected with a pressure gauge respectively.
Said high pressure oil pump is the high pressure Variable plunger pump, and the oil outlet place also is connected with precursor overflow valve, long-range relief valve, and said electro-hydraulic reversing valve is a three position four-way directional control valve.
The two ends of described loading motor connect high-pressure ball valve, pressure transducer, back pressure relief valve respectively, load one-way valve, long-range relief valve.
The two ends of described test motor connect testing high voltage ball valve, temperature transducer respectively; The working connection place is connected with high-pressure ball valve and pressure transducer in the test loop.
Also be connected with flow transducer and bypass low pressure ball valve on the said test motor.
Compared with prior art, the invention has the advantages that, adopt oil hydraulic motor in this device with the equal specification of test motor, same discharge capacity, same model or big one-level; Replace former traditional magnetic loader to make to load motor; Do that output loading is used and load motor and do not need other auxiliary, load motor simultaneously and adopt the low pressure gear pump fuel feeding, so volume dwindles greatly; Energy consumption reduces greatly, and little investment, easy-maintaining.The test bench that constitutes of deceleration loading device thus in addition, pressure is regulated can be by the test bench centralized control, and pressure regulator valve adopts telecontrol to regulate its on-load pressure; Therefore greatly facilitate tester's work, alleviated tester's labor intensity, discharge capacity and the pressure through the Moderator Variable oil pump can change rotational speed and the moment of torsion of testing motor simultaneously; Can test the oil hydraulic motor of different capacity, moment of torsion; Can measure the moment of torsion of 100Nm to 60000Nm, so test specification is wide, practical.
Description of drawings
Fig. 1, line construction schematic representation of the present invention.
Fig. 2, three position four-way directional control valve schematic representation.
Embodiment
Below in conjunction with accompanying drawing embodiments of the invention are described further.
Electro-hydraulic reversing valve is a three position four-way directional control valve 1.
High-pressure service pump is a high pressure Variable plunger pump 19, and low pressure pump is a low pressure gear pump 3
Oil suction one end of high voltage variable dispensing pump 19 is connected with fuel tank 2; The fuel-displaced the other end is connected with precursor overflow valve 10-5, long-range relief valve third 10-6, high pressure filter 6-3; The oil outlet of high pressure filter is connected with the filler opening of in line check valve 8-2, also is connected with pressure gauge first 9-3
The outlet of in line check valve 8-2 is connected with the P mouth of three position four-way directional control valve 1 through main high-pressure ball valve 7-6; The P mouth also is connected with pressure transducer 11-3 simultaneously; The A of three position four-way directional control valve 1, B hydraulic fluid port connect Double throttle check valve 18 and temperature transducer 17 respectively; Fluid is connected with the two ends of test motor 12-2 through testing high voltage ball valve 7-5,7-4; The T oil outlet of three position four-way directional control valve 1 connects main back pressure relief valve 10-3, main long-range relief valve 10-4, main flow sensor 15-2, gets back to fuel tank 2 behind the oil return butterfly valve 7-1 of return check valve 8-1 through being connected with pressure gauge 9-1 and parallel connection, the return filter 6-1 again and constitutes test motor oil circuits.
Oil suction one end of low pressure gear pump 3 is connected with fuel tank 2; Oil outlet end is connected with the filler opening of relief valve 4, one-way valve 5; Also be connected with pressure gauge second 9-2; The other end of one-way valve 5 passes through two parallelly connected smash valve 7-2 and is connected with the end that two of parallel connection loads one-way valve 8-3, and the other end of two loading one-way valves is connected with two back pressure relief valve 10-2 of parallel connection, long-range relief valve 10-1 respectively, is connected the two ends that load motor 12-1 through loading high-pressure ball valve 7-2, loading high-pressure ball valve 7-3; Be connected with pressure transducer 11-1, pressure transducer 11-2 in addition, constitute loading motor oil circuit.
During use, it is equal specification, same discharge capacity, same model or big other oil hydraulic motor of one-level that loading motor 12-1 will select and test motor 12-2 for use.
The main shaft that loads motor 12-1 and the main shaft of test motor 12-2 link into an integrated entity through duplicate invoice joint 13-1 and main coupling 13-2 and rotational speed and torque appearance 16 respectively.
At first with main high-pressure ball valve 7-6, testing high voltage ball valve 7-5, testing high voltage ball valve 7-4, two parallel connections load high-pressure ball valve 7-2, and loading high-pressure ball valve 7-3, two parallelly connected butterfly valve 7-1 open.
High pressure variable displacement pump 19 is from fuel tank 2 oil suctions; Get high pressure oil through high pressure filter 6-3, in line check valve 8-2, main high-pressure ball valve 7-6; Directly get into the P filler opening of three position four-way directional control valve 1; Switching-over back and the oil pocket that arrives test motor 12-2 through Double throttle check valve 18, testing high voltage ball valve 7-5 or testing high voltage ball valve 7-4 drive test motor 12-2 rotation.
Meanwhile low pressure gear pump 3 is from fuel tank 2 oil suctions; Go out fluid through one-way valve 5, connect pressure gauge second 9-2, relief valve 4 is kept the pressure of setting; Fluid arrives two of parallel connection and loads one-way valve 8-3, loads high-pressure ball valve 7-3, loads high-pressure ball valve 7-2; To loading motor 12-1 fuel feeding, and driven through main coupling 13-1, duplicate invoice joint 13-2 by test motor 12-2 and to load motor 12-1 rotation, the oil return that at this moment loads motor can not load one-way valve first 8-3 oil returns through two of parallel connection; After can only regulating on-load pressure through the back pressure relief valve 10-1 of parallel connection, long-range relief valve second 10-2, get back to fuel tank 2 through return check valve 8-1, return filter 6-1.
Just can measure moment of torsion and the rotating speed of test motor 12-2 through rotational speed and torque appearance 16.
Pressure transducer 11-1,11-2 through parallel connection just can detect the on-load pressure that loads motor 12-1, just can detect the force value of test motor 12-2 through primary pressure sensor 11-3.
Just can measure the out temperature of test motor through temperature transducer 17.
Just can detect the flow of the test motor 12-2 that flows through through main flow sensor 15-2; Open bypass low pressure ball valve 14 and measure leakage rate, calculate volumetric efficiency=test motor flow/test motor flow+test motor leakage rate of test motor 12-2 through formula through flow transducer 15-1.
Can see the breakout pressure of test motor 12-2 on primary pressure sensor 11-3 and the pressure gauge first 9-3, can progressively regulate Double throttle check valve 18 or high pressure variable displacement pump 19, make the rotating speed of test motor 12-2 reach the force value of measuring the test motor behind the rating value.
Through remote adjustment back pressure relief valve 10-2, make it reach rating value, from pressure transducer 11-1, the last force value of seeing on the loading motor 12-1 of 11-2.
Electromagnet gets dead electricity in the three position four-way directional control valve 1 through changing; But just automatic reverse; Be used for simulating the situation that the rotation of test motor 12-2 positive and negative direction is hit; Through regulating the pressure of main back pressure relief valve 10-3, main long-range relief valve 10-4, just can test out the situation of change under the test motor 12-2 back pressure situation, just can simulate the performance of measuring when testing motor 12-2 and under various different operating modes, working.
Claims (7)
1. the deceleration loading device of a hydraulic motor test board; The high pressure oil that it is characterized in that being got by the high pressure oil pump that is connected with fuel tank (2) is through high pressure filter (6-3), in line check valve (8-2); Get into electro-hydraulic reversing valve, Double throttle check valve (18) and test motor (12-2), then from the oil outlet of test motor through the oil outlet of described Double throttle check valve (18), electro-hydraulic reversing valve and master long-range relief valve (10-4), main back pressure relief valve (10-3), main flow sensor (15-2) is connected after return check valve (8-1), return filter (6-1) are got back to fuel tank (2) formation test loop; Also include loader in addition, described loader by the main shaft that loads motor (12-1), test motor (12-2) respectively through shaft coupling and rotational speed and torque appearance (16) formation that links into an integrated entity; Low pressure pump through being connected with fuel tank (2) gets into the two ends that load motor (12-1) through two one-way valves; The two ends that load motor (12-1) also are parallel with back pressure relief valve (10-2), long-range relief valve (10-1); When the test motor begins to rotate; The two loading one-way valves (8-3) at loading motor (12-1) two ends can be closed one automatically, get back to fuel tank (2) formation loading loop through back pressure relief valve (10-2), the long-range relief valve (10-1) at the two ends of loading motor through return check valve (8-1), return filter (6-1) and load the outlet fluid of motor.
2. the deceleration loading device of hydraulic motor test board according to claim 1 is characterized in that said low pressure pump is low pressure gear pump (3), and the oil outlet place also is connected with an one-way valve (5) and relief valve (4), pressure gauge second (9-2).
3. the deceleration loading device of hydraulic motor test board according to claim 1 is characterized in that said in line check valve (8-2), return check valve (8-1) locate to be connected with respectively a pressure gauge first (9-3), pressure gauge (9-1).
4. the deceleration loading device of hydraulic motor test board according to claim 1; It is characterized in that said high pressure oil pump is high pressure Variable plunger pump (19); The oil outlet place also is connected with precursor overflow valve (10-5), long-range relief valve (10-6), and said electro-hydraulic reversing valve is three position four-way directional control valve (1).
5. the deceleration loading device of hydraulic motor test board according to claim 1; The two ends that it is characterized in that said loading motor (12-1) connect loading high-pressure ball valve (7-2,7-3), pressure transducer (11-1,11-2), back pressure relief valve (10-2) respectively, load one-way valve (8-3), long-range relief valve (10-1).
6. the deceleration loading device of hydraulic motor test board according to claim 1 is characterized in that the two ends of said test motor (12-2) connect testing high voltage ball valve (7-4,7-5), temperature transducer (17) respectively; The working connection place is connected with main high-pressure ball valve (7-6) and primary pressure sensor (11-3) in the test loop.
7. the deceleration loading device of hydraulic motor test board according to claim 1 is characterized in that also being connected with on the said test motor (12-2) flow transducer (15-1) and bypass low pressure ball valve (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102256870A CN101871478B (en) | 2010-07-07 | 2010-07-07 | Loading device of hydraulic motor test board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102256870A CN101871478B (en) | 2010-07-07 | 2010-07-07 | Loading device of hydraulic motor test board |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101871478A CN101871478A (en) | 2010-10-27 |
| CN101871478B true CN101871478B (en) | 2012-08-29 |
Family
ID=42996526
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010102256870A Active CN101871478B (en) | 2010-07-07 | 2010-07-07 | Loading device of hydraulic motor test board |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101871478B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103867533A (en) * | 2014-03-26 | 2014-06-18 | 上海电气液压气动有限公司 | Hydraulic test system of railway tamping device |
Families Citing this family (25)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102297181B (en) * | 2010-11-18 | 2014-02-12 | 重庆大学 | Hydraulic control loop of hydraulic system performance test bench of automatic transmission |
| CN102175435A (en) * | 2010-12-16 | 2011-09-07 | 蚌埠市华泰液力变矩器有限公司 | Test-bed for hydraulic torque converter |
| CN102108983A (en) * | 2010-12-28 | 2011-06-29 | 宁夏永旺机电设备制造有限公司 | Hydraulic magnesium pressing machine |
| CN102200152A (en) * | 2011-07-04 | 2011-09-28 | 南京王行航空附件维修工程有限公司 | Performance test system of large-size airplane hydraulic element |
| CN103174692B (en) * | 2011-12-24 | 2015-10-28 | 中国航空工业集团公司沈阳飞机设计研究所 | A kind of for oil hydraulic motor dragging system that is high-power, wide speed regulating range load |
| CN103016452A (en) * | 2012-12-14 | 2013-04-03 | 中航力源液压股份有限公司 | Method and device for recovering and using energy produced in hydraulic motor load test |
| CN103048139B (en) * | 2012-12-19 | 2018-01-16 | 天津工程机械研究院 | Inertia load loading device is used in a kind of hydraulic motor test |
| CN103175684B (en) * | 2013-01-31 | 2015-06-17 | 温州大学 | Electro-hydraulic loading device for reducer test |
| CN104100603A (en) * | 2013-04-12 | 2014-10-15 | 迪斯油压工业(昆山)有限公司 | Hydraulic oil filtering system for oil press |
| CN103728138B (en) * | 2013-12-31 | 2016-08-17 | 合肥皖液液压元件有限公司 | gear motor performance test method |
| CN103742484A (en) * | 2014-01-06 | 2014-04-23 | 索特传动设备有限公司 | Motor decelerator test system |
| CN103867532A (en) * | 2014-03-26 | 2014-06-18 | 上海电气液压气动有限公司 | Hydraulic test system of loading motor of railway tamping device |
| CN104074839B (en) * | 2014-06-30 | 2016-06-22 | 南京创贝高速传动机械有限公司 | A kind of hydraulic motor test stand |
| CN104481974B (en) * | 2014-12-19 | 2017-09-12 | 上海电气液压气动有限公司 | Closed Hydraulic Pump Characteristic Test System |
| CN105298991B (en) * | 2015-11-18 | 2017-05-17 | 西安建筑科技大学 | Experiment platform and experiment method for virtual loading and controlling of engineering mechanical work conditions |
| CN105822627A (en) * | 2016-06-03 | 2016-08-03 | 南通纺都置业有限公司 | Torque testing device for hydraulic motor under different pressures |
| CN106438581A (en) * | 2016-11-30 | 2017-02-22 | 宿州市金河矿山设备有限公司 | Hydraulic motor detection experimental system |
| CN107100914A (en) * | 2017-05-02 | 2017-08-29 | 广州飞机维修工程有限公司 | A kind of airline carriers of passengers is counter to push away hydraulic actuation system testboard |
| CN108443267A (en) * | 2018-04-16 | 2018-08-24 | 中国人民解放军陆军工程大学 | A kind of continuously adjustable vehicle electrically controlling hydraulic-driven experimental stand system |
| CN108457934A (en) * | 2018-04-20 | 2018-08-28 | 苏州恩必技精密电气有限公司 | A kind of hydraulic slip ring integrated experimental device and its application method |
| CN109296594B (en) * | 2018-09-05 | 2023-08-15 | 芜湖中意液压科技股份有限责任公司 | Test system of high-power swing cylinder motor |
| CN109441707A (en) * | 2018-12-21 | 2019-03-08 | 上海电气液压气动有限公司 | From cooling piston motor |
| CN112855666B (en) * | 2021-01-05 | 2022-03-29 | 中联重科股份有限公司 | Loading oil way and loading test oil way |
| CN114033771B (en) * | 2021-11-10 | 2024-06-14 | 中国铁建重工集团股份有限公司 | Multi-working-condition load simulation test system for hydraulic pump or motor |
| CN114542549A (en) * | 2022-02-17 | 2022-05-27 | 北京华德液压工业集团有限责任公司 | High-precision pressure regulating loop |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201335057Y (en) * | 2008-11-28 | 2009-10-28 | 西安建筑科技大学 | Multisource diagnostic information acquisition experimental device for hydraulic equipment |
| CN101603527A (en) * | 2009-06-11 | 2009-12-16 | 中国矿业大学 | A kind of emulsion pump testing system |
| CN201714746U (en) * | 2010-07-07 | 2011-01-19 | 宁波市恒通液压科技有限公司 | Loading device of hydraulic motor test bench |
-
2010
- 2010-07-07 CN CN2010102256870A patent/CN101871478B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201335057Y (en) * | 2008-11-28 | 2009-10-28 | 西安建筑科技大学 | Multisource diagnostic information acquisition experimental device for hydraulic equipment |
| CN101603527A (en) * | 2009-06-11 | 2009-12-16 | 中国矿业大学 | A kind of emulsion pump testing system |
| CN201714746U (en) * | 2010-07-07 | 2011-01-19 | 宁波市恒通液压科技有限公司 | Loading device of hydraulic motor test bench |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103867533A (en) * | 2014-03-26 | 2014-06-18 | 上海电气液压气动有限公司 | Hydraulic test system of railway tamping device |
| CN103867533B (en) * | 2014-03-26 | 2016-04-27 | 上海电气液压气动有限公司 | A kind of hydraulic test system of railway tamping unit |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101871478A (en) | 2010-10-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101871478B (en) | Loading device of hydraulic motor test board | |
| CN103471829B (en) | A kind of test stand of multi-way valve of hydraulic excavator | |
| CN106468605B (en) | A kind of torque limiter breakaway torque Calibrating experimental bench on wind driven generator coupler | |
| CN103352900B (en) | A kind of heavy mining truck hydraulic jack/Experimental Rig of Hydraulic Valve | |
| CN201671901U (en) | Hydraulic combination valve block for branch/leaf shredders | |
| CN204646828U (en) | Servo-hydraulic final controlling element | |
| CN104047912B (en) | The digital pump controlled hydraulic differential cylinder in self-powered source | |
| CN105317785B (en) | Development machine multifunctional hydraulic testing stand | |
| CN104481971B (en) | Torque-type hydraulic pump and hydraulic motor power recovery test platform | |
| CN106151171B (en) | A kind of hydraulic motor and hydraulic pump universal test hydraulic system | |
| CN103775326A (en) | Power recovery test-bed for mechanical-compensation type hydraulic pump | |
| CN201714746U (en) | Loading device of hydraulic motor test bench | |
| CN103982478A (en) | Hydraulic system of stepless speed regulation hydropress | |
| CN104214142B (en) | manifold truck and hydraulic control system thereof | |
| CN201309412Y (en) | Full automatic circulation cleaning type oil exchanger for gear box | |
| CN203717315U (en) | Mechanical compensation-type hydraulic pump power recovery testboard | |
| CN206409467U (en) | A kind of hydraulic system for being used to test hydraulic motor | |
| CN103775436A (en) | Modularly-parallel, multi-machine and energy-saving reliability testing device for hydraulic pumps and hydraulic motors | |
| CN215985192U (en) | Cycloid hydraulic motor life test system | |
| CN203114798U (en) | Energy-saving servo hydraulic station | |
| CN102607843B (en) | Improved hydraulic oil circuit structure for marine gearbox test bench and operating method for improved hydraulic oil circuit structure | |
| CN101943638B (en) | Reliability test method and device of gripping tool rotating body of forestry crane | |
| CN209323586U (en) | A kind of excavator energy-saving hydraulic control system | |
| CN108086396A (en) | A kind of continuous hydraulic loading machine closed circuit hydraulic system | |
| CN206830552U (en) | Supercharging Servocontrol device on superposing type force standard machine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: NINGBO HELM TOWER HYDRAULIC TECHNOLOGY CO., LTD. Free format text: FORMER OWNER: JIN BIHUA Effective date: 20121029 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 315200 NINGBO, ZHEJIANG PROVINCE TO: 315103 NINGBO, ZHEJIANG PROVINCE |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20121029 Address after: 315103, 3, 10, Lingyun Road, 1177 hi tech Zone, Zhejiang, Ningbo Patentee after: Ningbo Helm Tower Hydraulic Motor Co., Ltd. Address before: 315200 Ningbo Hengtong Hydraulic Technology Co., Ltd., No. 1818 East Luo Luo Road, Zhenhai Town, Zhejiang, Ningbo Patentee before: Jin Bihua |
|
| C56 | Change in the name or address of the patentee | ||
| CP03 | Change of name, title or address |
Address after: 315207, 1, 1818 East Luo Lu, Zhenhai Town, Zhenhai District, Zhejiang, Ningbo Patentee after: NINGBO HENGTONG NUODA HYDRAULIC CO., LTD. Address before: 315103, 3, 10, Lingyun Road, 1177 hi tech Zone, Zhejiang, Ningbo Patentee before: Ningbo Helm Tower Hydraulic Motor Co., Ltd. |