CN207297498U - A kind of hydraulic system for load test - Google Patents
A kind of hydraulic system for load test Download PDFInfo
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- CN207297498U CN207297498U CN201721334477.9U CN201721334477U CN207297498U CN 207297498 U CN207297498 U CN 207297498U CN 201721334477 U CN201721334477 U CN 201721334477U CN 207297498 U CN207297498 U CN 207297498U
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- oil
- oil inlet
- motor
- outlet
- hydraulic system
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Abstract
The utility model 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 utility model easily changes load, easy to control, and experimental performance is stablized, and versatility is good, and input cost is low.
Description
Technical field
The Components such as gearbox, reduction box, motor, motor field is the utility model is related to, more particularly, to one
Kind be used for the hydraulic system of the component 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.There are control system again to answer for electrical-closed load mode
It is miscellaneous, put into the shortcomings that high.
Utility model content
The purpose of this utility model is to provide a kind of hydraulic system for load test.
To achieve the above object, the utility model 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 component 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 outlet connecting line filter；In-line filter goes out
The oil outlet 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 of several check valves, has several oil inlets, one
Two in a oil outlet, wherein oil inlet are connected with two oil inlet and outlets of motor, the oil inlet of oil outlet 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 equipped 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 to fuel tank.
Further, the hydraulic system further 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 outlet connection fuel tank of water cooler.
Further, pressure gauge is equipped 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 equipped 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 bridge-type selection loop mechanism is made of four check valves, have three into
Hydraulic fluid port, an oil outlet, 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 outlet and proportional pressure control valve；The oil outlet of high-pressure plate type cooler is also connected with bridge-type and selects back
One oil inlet of road mechanism.
Further, pressure gauge and pressure sensor are equipped 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 outlet,
Two oil inlet and outlets are respectively communicated with two oil inlet and outlets of motor, and oil outlet connects the oil inlet of the second overflow valve；Second overflow
The oil return opening connection fuel tank of valve.
The utility model has the following advantages：
The hydraulic system of the utility model easily changes load, easy to control, and experimental performance is stablized, and versatility is good, puts into
This is low.
1st, the hydraulic system of the utility model is loaded using proportional pressure control valve, it is possible to achieve continuous, stable loading, can be very well
Control 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 the hydraulic system of the utility model, proportional overflow
The deep fat that valve produces cools down rapidly in high-pressure plate type cooler, effectively reduces influence of the deep fat to system, reduces pair
The requirement that overflow valve system carries out heat exchange is rinsed, the logical oil mass and volume for rinsing relief valve unit are obviously reduced.
4th, the hydraulic system of the utility model has repairing unit, can effective compensation system oil leakage, it is ensured that inlet port
Pressure, avoid oil pump from being emptied, loading moment of torsion is more stablized, while high-pressure plate type cooler fuel-displaced and imported repairing pipe
Road, without directly flowing back to fuel tank, effectively reduces the traffic requirement to repairing unit, reduces the power consumption of repairing unit.
5th, the hydraulic system of the utility model is provided with independent low pressure cooling unit, plus high-pressure plate type cooler and punching
The effect of overflow valve system is washed, realizes effective combination of high-low pressure cooling unit so that the fluid of system can obtain fast quickly cooling
But, the influence that fever produces oil piping system is farthest reduced.
Brief description of the drawings
Specific embodiment of the present utility model 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 utility model.
Embodiment
In order to illustrate more clearly of the utility model, the utility model is done further with reference to preferred embodiment
It is bright.It will be appreciated by those skilled in the art that specifically described content is illustrative and be not restrictive below, should not be with this
Limit the scope of protection of the utility model.
Embodiment
As shown in Figure 1, it is the principle composition figure of the hydraulic system of the utility model.The hydraulic system includes motor 1, repairing
Unit, 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 are into fuel-displaced
Mouthful), it is high pressure hydraulic fluid port, can bidirectional rotation, biaxial loadings.The 4th pressure gauge 19 and the 3rd is equipped with A oil inlet and outlet pipelines
Pressure sensor 18, is equipped with the 3rd pressure gauge 14 and second pressure sensor 13 on B oil inlet and outlet pipelines.During work, it is tested
Try the axis connection of component (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 gauge 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 outlet connecting line filter 5.The outlet of in-line filter 5 connects the oil inlet of the first overflow valve 7 and adds
Carry the oil outlet of the high-pressure plate type cooler 8 of proportional unit.First pressure gauge 6 is equipped 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 outlet be connected to bridge-type selection
The oil inlet of loop mechanism, for giving system repairing.5 and first overflow of filter by the road of the fluid of first oil pump, 4 oil outlet
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 outlet, wherein three oil inlets respectively with
The oil outlet connection of two oil inlet and outlets and repairing unit of motor 1, the oil inlet of an oil outlet 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 outlet of high-pressure plate type cooler 8
It is also connected with an oil inlet of bridge-type selection loop mechanism；Second pressure is equipped with the oil inlet pipeline of high-pressure plate type cooler 8
Table 10 and first pressure sensor 9.Rinsing overflow valve system includes 20 and second overflow valve 21 of hydraulic directional valve；Hydraulic directional valve
20 be three position three-way change valve, has two oil inlet and outlets and an oil outlet, and two oil inlet and outlets are respectively communicated with the two of motor 1
A oil inlet and outlet, oil outlet 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 to 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 outlet connects the oil inlet of the 3rd overflow valve 25 and the oil inlet of water cooler 27.The oil outlet connection fuel tank of water cooler 27
28.The 5th pressure gauge 26 is equipped 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 utility model 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 outlet.Tested gearbox is reversely transported
When turning, the B of motor 1 is oil inlet, and A is oil outlet.Fluid is by repairing unit by the second check valve 15, the 3rd check valve 16
To system repairing.Just start when, 11 input current of proportional pressure control valve 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 pass through proportional pressure control valve 11
Oil return opening enters the oil inlet of high-pressure plate type cooler 8, and entering bridge-type by the oil outlet of high-pressure plate type cooler 8 selects circuit
The oil inlet of mechanism, realizes that oil circulation uses, while repairing unit starting, and the first overflow valve 7 sets up oil compensation pressure, mends in time
Filling liquid 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 is sensed more than second pressure
During the set pressure of 13 or the 4th pressure sensor 19 of device, system-down is to protect system safe.
The oil inlet pipeline of high-pressure plate type cooler 8 is equipped 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, leads to fuel tank, the heat dissipation of secondary load proportional unit by the deep fat in AB pipelines in time.
When carrying out load test, while start the second motor 24, the second oil pump 22 goes out from 28 oil suction of fuel tank, the second oil pump 22
Mouth connects the oil inlet of the 3rd overflow valve 25 and the oil inlet of water cooler 27 at the same time.The oil outlet 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, above-described embodiment of the utility model is only intended to clearly illustrate the utility model example, and
It is not the restriction to the embodiment of the utility model, for those of ordinary skill in the field, in described above
On the basis of can also make other variations or changes in different ways, all embodiments can not be exhaustive here,
It is every to belong to obvious changes or variations that the technical solution of the utility model is extended out still in the utility model
The row of protection domain.
Claims (10)
1. a kind of hydraulic system for load test, it is characterised in that the hydraulic system includes motor, repairing unit, adds
Carry proportional unit and fuel tank；
The motor has two oil inlet and outlets, tested component 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 outlet connecting line filter；The outlet of in-line filter connects
The oil outlet 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 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 outlet 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 equipped between two oil inlets that two oil inlet and outlets are connected and rinses overflow valve system, including hydraulic directional valve and the second overflow
Valve, for the fluid of system pipeline is discharged to 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 outlet connect the oil inlet and water of the 3rd overflow valve
The oil inlet of cooler；The oil outlet 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 of four check valves, has three oil inlets, an oil outlet, 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 outlet and proportional pressure control valve
Connection；The oil outlet 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 outlet, two oil inlet and outlets are respectively communicated with two of motor
Oil inlet and outlet, oil outlet 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 a 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 equipped 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 equipped 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 equipped with pressure gauge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721334477.9U CN207297498U (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 |
|---|---|---|---|
| CN201721334477.9U CN207297498U (en) | 2017-10-17 | 2017-10-17 | A kind of hydraulic system for load test |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207297498U true CN207297498U (en) | 2018-05-01 |
Family
ID=62272015
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721334477.9U Active CN207297498U (en) | 2017-10-17 | 2017-10-17 | A kind of hydraulic system for load test |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207297498U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109869362A (en) * | 2019-01-31 | 2019-06-11 | 中国铁建重工集团有限公司 | For simulating the hydraulic system of rock drilling load and the analog detection method of rock drilling load |
| CN109883744A (en) * | 2019-02-22 | 2019-06-14 | 柳州北斗星液压科技有限公司 | A kind of device and method for excavator thermal equilibrium analysis |
-
2017
- 2017-10-17 CN CN201721334477.9U patent/CN207297498U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109869362A (en) * | 2019-01-31 | 2019-06-11 | 中国铁建重工集团有限公司 | For simulating the hydraulic system of rock drilling load and the analog detection method of rock drilling load |
| CN109883744A (en) * | 2019-02-22 | 2019-06-14 | 柳州北斗星液压科技有限公司 | A kind of device and method for excavator thermal equilibrium analysis |
| CN109883744B (en) * | 2019-02-22 | 2021-05-07 | 柳州北斗星液压科技有限公司 | Device and method for analyzing thermal balance of excavator |
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