CN107605837A - A kind of hydraulic system for load test - Google Patents
A kind of hydraulic system for load test Download PDFInfo
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- CN107605837A CN107605837A CN201710965446.1A CN201710965446A CN107605837A CN 107605837 A CN107605837 A CN 107605837A CN 201710965446 A CN201710965446 A CN 201710965446A CN 107605837 A CN107605837 A CN 107605837A
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- oil
- oil inlet
- motor
- hydraulic system
- load test
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Abstract
The invention discloses a kind of hydraulic system for load test, including motor, repairing unit, loading proportional unit, low pressure cooling unit and fuel tank.The hydraulic system of the present invention easily changes load, easy to control, and experimental performance is stable, and versatility is good, and input cost is low.
Description
Technical field
The present invention relates to the Components such as gearbox, reduction box, motor, motor field, is used more particularly, to one kind
In the hydraulic system of the part load test such as gearbox, reduction box, hydraulic motor, motor, the system can to output speed
Torque carries out continuous bilateral loading.
Background technology
At present, load test mainly has two major classes：One kind be it is open, one kind be it is closed, it is closed and be divided into machinery
It is closed and electrical-closed.The testing stand mechanical mechanism of mechanical close formula is complicated, and transmission efficiency is low, and malleable does not carry in operation
Lotus, torque are difficult to control, and experimental performance is not sufficiently stable, and versatility is poor.Control system again be present and answer in electrical-closed load mode
It is miscellaneous, put into the shortcomings that high.
The content of the invention
It is an object of the invention to provide a kind of hydraulic system for load test.
To achieve the above object, the present invention uses herein below：
A kind of hydraulic system for load test, including motor, repairing unit, loading proportional unit and fuel tank；
The motor has two oil inlet and outlets, tested part is connected with motor as two-way pump；
The repairing unit includes the first motor, the first oil pump, in-line filter and the first overflow valve；First motor and
One oil pump is connected；The inlet port connection fuel tank of first oil pump, the import of oil-out connecting line filter；In-line filter goes out
The oil-out of the oil inlet of mouth the first overflow valve of connection and the high-pressure plate type cooler of loading proportional unit；
The loading proportional unit includes bridge-type selection loop mechanism, proportional pressure control valve, rinses overflow valve system and high pressure
Panel cooler；The bridge type mechanism that bridge-type selection loop mechanism is made up of several check valves, has several oil inlets, one
Two in individual oil-out, wherein oil inlet are connected with two oil inlet and outlets of motor, the oil-feed of oil-out and proportional pressure control valve
Mouth connection；The oil inlet of the oil return opening connection high-pressure plate type cooler of proportional pressure control valve；Bridge-type selection loop mechanism and horse
It is provided between two oil inlets that two oil inlet and outlets reached are connected and rinses overflow valve system, including hydraulic directional valve and second overflows
Valve is flowed, for the fluid of system pipeline is discharged into fuel tank.
Further, the hydraulic system also includes low pressure cooling unit；Low pressure cooling unit includes the second motor, second
Oil pump, the 3rd overflow valve and water cooler；Second motor is connected with the second oil pump；The inlet port connection fuel tank of second oil pump, goes out
Hydraulic fluid port connects the oil inlet of the 3rd overflow valve and the oil inlet of water cooler；The oil-out connection fuel tank of water cooler.
Further, pressure gauge is provided with the oil inlet pipeline of water cooler.
Further, the motor is variable displacement motor.
Further, pressure gauge and pressure sensor are respectively equipped with two oil inlet and outlet pipelines of the motor.
Further, the outlet of the in-line filter is also connected to the oil inlet of bridge-type selection loop mechanism.
Further, pressure gauge is provided with the export pipeline of the in-line filter.
Further, the oil return opening connection fuel tank of first overflow valve.
Further, the bridge type mechanism that the bridge-type selection loop mechanism is made up of four check valves, has three and enters
Hydraulic fluid port, an oil-out, wherein outlet of three oil inlets respectively with two oil inlet and outlets and in-line filter of motor connects
Connect, the oil inlet connection of an oil-out and proportional pressure control valve；The oil-out of high-pressure plate type cooler is also connected with bridge-type and selected back
One oil inlet of road mechanism.
Further, pressure gauge and pressure sensor are provided with the oil inlet pipeline of the high-pressure plate type cooler.
Further, the hydraulic directional valve is three position three-way change valve, has two oil inlet and outlets and an oil-out,
Two oil inlet and outlets are respectively communicated with two oil inlet and outlets of motor, and oil-out connects the oil inlet of the second overflow valve；Second overflow
The oil return opening connection fuel tank of valve.
The present invention has advantages below：
The hydraulic system of the present invention easily changes load, easy to control, and experimental performance is stable, and versatility is good, and input cost is low.
1st, hydraulic system adoption rate overflow valve of the invention loading, it is possible to achieve continuous, stable loading, can control well
System loading moment of torsion.
2nd, overflow valve system is rinsed in the oil inlet increase for being located at both sides in bridge-type selection loop mechanism, will effectively can close
The fluid of formula system AB pipelines is discharged to fuel tank, while takes away the heat in pipeline.
3rd, the oil return opening connection high-pressure plate type cooler of the proportional pressure control valve of hydraulic system of the invention, proportional pressure control valve production
Raw deep fat cools down rapidly in high-pressure plate type cooler, effectively reduces influence of the deep fat to system, reduces to rinsing
Overflow valve system carries out the requirement of heat exchange, and the logical oil mass and volume for rinsing relief valve unit are obviously reduced.
4th, hydraulic system of the invention has repairing unit, can effective compensation system oil leakage, it is ensured that the pressure of inlet port
Power, avoid oil pump from being emptied, make loading moment of torsion more stable, while high-pressure plate type cooler fuel-displaced and import repairing pipeline,
Without directly flowing back to fuel tank, the traffic requirement to repairing unit is effectively reduced, reduces the power consumption of repairing unit.
5th, hydraulic system of the invention is provided with independent low pressure cooling unit, plus high-pressure plate type cooler and rinses excessive
The effect of valve system is flowed, realizes effective combination of high-low pressure cooling unit so that the fluid of system can be cooled down quickly, most
Big degree reduces heating to influence caused by oil piping system.
Brief description of the drawings
The embodiment of the present invention is described in further detail below in conjunction with the accompanying drawings.
Fig. 1 is the principle composition figure of the hydraulic system of the present invention.
Embodiment
In order to illustrate more clearly of the present invention, with reference to preferred embodiment, the present invention is described further.Ability
Field technique personnel should be appreciated that following specifically described content is illustrative and be not restrictive, and this should not be limited with this
The protection domain of invention.
Embodiment
As shown in figure 1, it is the principle composition figure of the hydraulic system of the present invention.The hydraulic system includes motor 1, repairing list
Member, loading proportional unit, low pressure cooling unit and fuel tank.
Motor 1 is variable displacement motor, is used as two-way pump, and having two oil inlet and outlets, (A oil inlet and outlets and B enter fuel-displaced
Mouthful), it is high pressure hydraulic fluid port, can bidirectional rotation, biaxial loadings.The 4th pressure gauge 19 and the 3rd is provided with A oil inlet and outlet pipelines
Pressure sensor 18, the 3rd pressure gauge 14 and second pressure sensor 13 are provided with B oil inlet and outlet pipelines.During work, it is tested
Try the axis connection of part (such as output shaft of gearbox) and motor 1.
Repairing unit include the first motor 2, the first connector 3, the first oil pump 4, in-line filter 5, the first overflow valve 7,
First pressure table 6.First motor 2 is connected through the first connector 3 with the first oil pump 4.The inlet port connection fuel tank of first oil pump 4
28, the import of oil-out connecting line filter 5.The outlet of in-line filter 5 connects the oil inlet of the first overflow valve 7 and added
Carry the oil-out of the high-pressure plate type cooler 8 of proportional unit.First pressure table 6 is provided with the export pipeline of in-line filter 5.
In a preferred embodiment, the outlet of in-line filter 5 be alternatively arranged as repairing unit oil-out be connected to bridge-type selection
The oil inlet of loop mechanism, for giving system repairing.The overflow of filter 5 and first by the road of the fluid of the oil-out of first oil pump 4
Loading proportional unit is covered after valve 7 again.First overflow valve 7 is used to set oil compensation pressure, the oil return opening connection oil of the first overflow valve 7
Case 28.
Loading proportional unit includes bridge-type selection loop mechanism, proportional pressure control valve 11, rinses overflow valve system, high-pressure plate type
Cooler 8.Bridge-type selection loop mechanism is by four check valves (the first check valve 12, the second check valve 15, the 3rd check valve
16th, the 4th check valve 17) composition bridge type mechanism, have three oil inlets, an oil-out, wherein three oil inlets respectively with
The oil-out connection of two oil inlet and outlets and repairing unit of motor 1, the oil inlet of an oil-out and proportional pressure control valve 11
Connection.The oil inlet of the oil return opening connection high-pressure plate type cooler 8 of proportional pressure control valve 11.The oil-out of high-pressure plate type cooler 8
It is also connected with an oil inlet of bridge-type selection loop mechanism；Second pressure is provided with the oil inlet pipeline of high-pressure plate type cooler 8
Table 10 and first pressure sensor 9.Rinsing overflow valve system includes the overflow valve 21 of hydraulic directional valve 20 and second；Hydraulic directional valve
20 be three position three-way change valve, has two oil inlet and outlets and an oil-out, and two oil inlet and outlets are respectively communicated with the two of motor 1
Individual oil inlet and outlet, oil-out connect the oil inlet of the second overflow valve 21；The oil return opening connection fuel tank 28 of second overflow valve 21.Second
Overflow valve 21 is used to set flushing pressure, the deep fat in AB pipelines is led into fuel tank 28 in time, secondary load proportional unit dissipates
Heat.
Low pressure cooling unit includes the second motor 24, the second connector 23, the second oil pump 22, the 3rd overflow valve 25, water cooling
But device 27.Second motor 24 is connected through the second connector 23 with the second oil pump 22.The inlet port connection fuel tank 28 of second oil pump 22,
Oil-out connects the oil inlet of the 3rd overflow valve 25 and the oil inlet of water cooler 27.The oil-out connection fuel tank of water cooler 27
28.The 5th pressure gauge 26 is provided with the oil inlet pipeline of water cooler 27.
By taking gearbox as an example, the concrete operating principle of the hydraulic system of the present invention is described as follows：
1st, no-load test
During tested gearbox Positive work, the A of motor 1 is oil inlet, and B is oil-out.Tested gearbox is reversely transported
When turning, the B of motor 1 is oil inlet, and A is oil-out.Fluid is by repairing unit by the second check valve 15, the 3rd check valve 16
To system repairing.Just start when, the input current of proportional pressure control valve 11 is adjusted to it is very low, fluid by proportional pressure control valve 11, high pressure
Panel cooler 8 enters hydraulic system again, realizes that low-pressure low discharge is run.
2nd, load test
The suction oil of motor 1 is identical with no-load test.By being slowly increased the input current of proportional pressure control valve 11, control adds
Carry the pressure of experiment.When on-load pressure exceedes the set pressure of proportional pressure control valve 11, fluid can passing ratio overflow valve 11
Oil return opening enters the oil inlet of high-pressure plate type cooler 8, and entering bridge-type by the oil-out of high-pressure plate type cooler 8 selects loop
The oil inlet of mechanism, realize that oil circulation uses, while repairing unit starting, the first overflow valve 7 are set up oil compensation pressure, mended in time
Topping up presses the fluid of system loss, it is ensured that oil pump suction mouth has stable pressure oil.
Pressure gauge and pressure sensor are equipped with two hydraulic fluid port pipelines of motor 1, when pressure senses more than second pressure
During the set pressure of the pressure sensor 19 of device 13 or the 4th, system-down is to protect system safe.
The oil inlet pipeline of high-pressure plate type cooler 8 is provided with second pressure gauge 10 and first pressure sensor 9, when ratio is overflow
When flowing the return pressure of valve 11 and exceeding the set pressure of first pressure sensor 9, system-down is to protect high-pressure plate type cooler.
Hydraulic directional valve 20 is three position three-way change valve.The oil inlet connection hydraulic directional valve 21 of second overflow valve 21 goes out
Hydraulic fluid port, for setting flushing pressure, the deep fat in AB pipelines is led into fuel tank, the radiating of secondary load proportional unit in time.
When carrying out load test, while start the second motor 24, the second oil pump 22 goes out from the oil suction of fuel tank 28, the second oil pump 22
Mouth connects the oil inlet of the 3rd overflow valve 25 and the oil inlet of water cooler 27 simultaneously.The oil-out connection fuel tank of water cooler 27
28.3rd overflow valve 25 is used as safety valve, protects the second oil pump 22 and water cooler 27.
Whole system uses high-low pressure combination cooling unit, to ensure that system fluid keeps normal temperature.
Obviously, the above embodiment of the present invention is only intended to clearly illustrate example of the present invention, and is not pair
The restriction of embodiments of the present invention, for those of ordinary skill in the field, may be used also on the basis of the above description
To make other changes in different forms, all embodiments can not be exhaustive here, it is every to belong to this hair
Row of the obvious changes or variations that bright technical scheme is extended out still in protection scope of the present invention.
Claims (10)
1. a kind of hydraulic system for load test, it is characterised in that the hydraulic system includes motor, repairing unit, added
Carry proportional unit and fuel tank；
The motor has two oil inlet and outlets, tested part is connected with motor as two-way pump；
The repairing unit includes the first motor, the first oil pump, in-line filter and the first overflow valve；First motor and the first oil
Pump is connected；The inlet port connection fuel tank of first oil pump, the import of oil-out connecting line filter；The outlet of in-line filter connects
The oil-out of the oil inlet for connecing the first overflow valve and the high-pressure plate type cooler for loading proportional unit；
The loading proportional unit includes bridge-type selection loop mechanism, proportional pressure control valve, rinses overflow valve system and high-pressure plate type
Cooler；The bridge type mechanism that bridge-type selection loop mechanism is made up of several check valves, goes out with several oil inlets, one
Two in hydraulic fluid port, wherein oil inlet are connected with two oil inlet and outlets of motor, and the oil inlet of oil-out and proportional pressure control valve connects
Connect；The oil inlet of the oil return opening connection high-pressure plate type cooler of proportional pressure control valve；In bridge-type selection loop mechanism with motor
It is provided between two connected oil inlets of two oil inlet and outlets and rinses overflow valve system, including hydraulic directional valve and the second overflow
Valve, for the fluid of system pipeline is discharged into fuel tank.
2. a kind of hydraulic system for load test according to claim 1, it is characterised in that the hydraulic system is also
Including low pressure cooling unit；Low pressure cooling unit includes the second motor, the second oil pump, the 3rd overflow valve and water cooler；Second
Motor is connected with the second oil pump；The inlet port connection fuel tank of second oil pump, oil-out connect the oil inlet and water of the 3rd overflow valve
The oil inlet of cooler；The oil-out connection fuel tank of water cooler.
A kind of 3. hydraulic system for load test according to claim 1 or 2, it is characterised in that the pipeline mistake
The outlet of filter is also connected to the oil inlet of bridge-type selection loop mechanism.
4. a kind of hydraulic system for load test according to claim 3, it is characterised in that the bridge-type selects back
The bridge type mechanism that road mechanism is made up of four check valves, there is three oil inlets, an oil-out, wherein three oil inlets point
Outlet not with two oil inlet and outlets and in-line filter of motor is connected, the oil inlet of an oil-out and proportional pressure control valve
Connection；The oil-out of high-pressure plate type cooler is also connected with an oil inlet of bridge-type selection loop mechanism.
A kind of 5. hydraulic system for load test according to claim 1, it is characterised in that the hydraulic directional valve
For three position three-way change valve, there is two oil inlet and outlets and an oil-out, two oil inlet and outlets are respectively communicated with two of motor
Oil inlet and outlet, oil-out connect the oil inlet of the second overflow valve；The oil return opening connection fuel tank of second overflow valve.
6. a kind of hydraulic system for load test according to claim 1, it is characterised in that the motor is variable
Motor.
7. a kind of hydraulic system for load test according to claim 1, it is characterised in that the two of the motor
Pressure gauge and pressure sensor are respectively equipped with individual oil inlet and outlet pipeline.
8. a kind of hydraulic system for load test according to claim 1, it is characterised in that filtered in the pipeline
The export pipeline of device is provided with pressure gauge.
9. a kind of hydraulic system for load test according to claim 1, it is characterised in that in the high-pressure plate type
The oil inlet pipeline of cooler is provided with pressure gauge and pressure sensor.
10. a kind of hydraulic system for load test according to claim 2, it is characterised in that in water cooler
Oil inlet pipeline is provided with pressure gauge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710965446.1A CN107605837A (en) | 2017-10-17 | 2017-10-17 | A kind of hydraulic system for load test |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710965446.1A CN107605837A (en) | 2017-10-17 | 2017-10-17 | A kind of hydraulic system for load test |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107605837A true CN107605837A (en) | 2018-01-19 |
Family
ID=61077620
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710965446.1A Withdrawn CN107605837A (en) | 2017-10-17 | 2017-10-17 | A kind of hydraulic system for load test |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107605837A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108612687A (en) * | 2018-06-13 | 2018-10-02 | 柳州北斗星液压科技有限公司 | Hydraulic loaded for cterpillar drive tests system |
| CN114087259A (en) * | 2021-11-10 | 2022-02-25 | 中国航发沈阳黎明航空发动机有限责任公司 | Hydraulic test device and test method for inspecting and adjusting jet pipe of aircraft engine |
| CN114526228A (en) * | 2022-02-18 | 2022-05-24 | 徐州圣邦机械有限公司 | Performance test bed and experimental method for internal gear pump |
-
2017
- 2017-10-17 CN CN201710965446.1A patent/CN107605837A/en not_active Withdrawn
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108612687A (en) * | 2018-06-13 | 2018-10-02 | 柳州北斗星液压科技有限公司 | Hydraulic loaded for cterpillar drive tests system |
| CN108612687B (en) * | 2018-06-13 | 2024-01-23 | 柳州北斗星液压科技有限公司 | Hydraulic loading test system for crawler-type running gear |
| CN114087259A (en) * | 2021-11-10 | 2022-02-25 | 中国航发沈阳黎明航空发动机有限责任公司 | Hydraulic test device and test method for inspecting and adjusting jet pipe of aircraft engine |
| CN114087259B (en) * | 2021-11-10 | 2024-04-12 | 中国航发沈阳黎明航空发动机有限责任公司 | Hydraulic test device and test method for checking and adjusting jet pipe of aero-engine |
| CN114526228A (en) * | 2022-02-18 | 2022-05-24 | 徐州圣邦机械有限公司 | Performance test bed and experimental method for internal gear pump |
| CN114526228B (en) * | 2022-02-18 | 2024-02-20 | 徐州圣邦机械有限公司 | Internal gear pump performance test bed and test method |
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Application publication date: 20180119 |