CN101871478B

CN101871478B - Loading device of hydraulic motor test board

Info

Publication number: CN101871478B
Application number: CN2010102256870A
Authority: CN
Inventors: 徐文利
Original assignee: 金碧华
Priority date: 2010-07-07
Filing date: 2010-07-07
Publication date: 2012-08-29
Also published as: CN101871478A

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

The deceleration loading device of hydraulic motor test board

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

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).