CN207921030U - A kind of oil cylinder internal leakage test system - Google Patents
A kind of oil cylinder internal leakage test system Download PDFInfo
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- CN207921030U CN207921030U CN201721896679.2U CN201721896679U CN207921030U CN 207921030 U CN207921030 U CN 207921030U CN 201721896679 U CN201721896679 U CN 201721896679U CN 207921030 U CN207921030 U CN 207921030U
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- oil
- cylinder
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- oil cylinder
- return pipe
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Abstract
The utility model discloses a kind of oil cylinder internal leakages to test system, including tested oil cylinder and pass through the load cylinder of sliding block and connection, magnetic displacement transducer is installed on sliding block, tested oil cylinder is connected with the first oil inlet and oil return pipe, first solenoid directional control valve is installed to control into, oil return on the first oil inlet and oil return pipe, hydraulic control one-way valve is installed on the first oil inlet and oil return pipe；Load cylinder is connected with the second oil inlet and oil return pipe, and the second solenoid directional control valve is equipped on the second oil inlet and oil return pipe and is controlled into, oil return.The oil cylinder internal leakage test system of the utility model is applied to oil cylinder internal leakage test, it can be achieved that Self-pressurizing agri, automatic measurement, measurement result are read automatically by equipment, and speed is fast, and precision is high.
Description
Technical field
The utility model is related to hydraulic test field, more particularly to system is tested in a kind of oil cylinder internal leakage.
Background technology
A small amount of hydraulic fluid leak is had during cylinder efficient and goes out cylinder body, and leakage divides internal leakage and external leakage.Internal leakage
Refer to leakage of the fluid from piston side by sealing element to the piston other side.Internal leakage can not be from oil cylinder external observation to oil cylinder
Manufacturing process needs to test internal leakage, ensures working performance.
Traditional internal leakage test mode is to fix piston, is forced into operating pressure to oil cylinder side is oil-filled, oil cylinder is another
Side oil outlet incoming stream gauge or measuring cup measure the fluid amount flowed out from oil outlet in certain time after pressurize.
Using traditional measurement mode, time-consuming, error is big.Due to general hydraulic cylinder interior leakage leakage quantity very little (about 0.1~20ml/
Min), common flow meters are not read substantially under this flow, using the counting cup meter single measurement time in 1min or more, and
Automation difficult to realize, is not suitable for the on-line testing of batch production.
Due to oil cylinder it is offline after it is internal can remain a certain amount of gas, a small amount of gas can pressurize in oil cylinder in test process
When no pressure side leaked to by piston seal, the gas after pressurization, can will part oil in the volume expansion of no pressure side
Liquid squeezes out oil outlet, causes measurement error.
Utility model content
Being applied to oil cylinder internal leakage test the technical problem to be solved by the present invention is to provide one kind, it can be achieved that automatic add
Pressure, automatic measurement, measurement result are read automatically by equipment, and speed is fast, and system is tested in oil cylinder internal leakage with high accuracy.
In order to solve the above-mentioned technical problem, the embodiment of the utility model is：
A kind of oil cylinder internal leakage test system, including be tested oil cylinder and added by what sliding block was connect with the tested oil cylinder
Oil cylinder is carried, magnetic displacement transducer is installed on the sliding block, two hydraulic fluid ports of the tested oil cylinder are connected with the first oil inlet and oil return pipe,
A pair of of solenoid directional control valve is installed to control into, oil return on the first oil inlet and oil return pipe, two oil ports of the tested oil cylinder are in institute
It states and the first hydraulic control one-way valve is installed on the first oil inlet and oil return pipe；Two hydraulic fluid ports of the load cylinder are connected with the second oil inlet and oil return pipe,
A pair of second solenoid directional control valve is installed to control into, oil return on the second oil inlet and oil return pipe.
Preferably, the tested oil cylinder, load cylinder are each attached on rack.
Preferably, the tested oil cylinder, load cylinder piston rod be oppositely arranged.
Compared with prior art, the beneficial effects of the utility model are：
The utility model proposes a kind of oil cylinder internal leakage test system, magnetic displacement transducer resolution is installed on sliding block
Rate is high, very high resolution ratio can be realized for typical hydraulic cylinder leakage rate, for the product of identical leakage rate, the oil cylinder internal leakage
Test system can measure leakage volume relative to flowmeter in the shorter time.Measurement result is read by sensor simultaneously
Go out, can easily be integrated into automated system, it can be achieved that Self-pressurizing agri, automatic measurement, measurement result are read automatically by equipment,
Speed is fast.
Systematic survey internal leakage is tested in the oil cylinder internal leakage, has stronger adaptation for minimum gas that may be present in oil cylinder
Property, the volume that gas can be compressed to very little in tested oil cylinder pressurization side by powerful oil pressure even liquefies, is not pressurized when leaking to
Behind side, gas volume increase will not influence the displacement of piston, therefore avoid measurement error factor that may be present, measure
Precision is high.
Description of the drawings
Fig. 1 is that the structural schematic diagram of system is tested in the oil cylinder internal leakage of the utility model embodiment.
Specific implementation mode
Specific embodiment of the present utility model is described further below in conjunction with the accompanying drawings.It should be noted that
The explanation of these embodiments is used to help to understand the utility model, but does not constitute the restriction to the utility model.This
Outside, technical characteristic involved in the various embodiments of the present invention described below is as long as they do not conflict with each other
It can be combined with each other.
Please refer to Fig. 1, system is tested in the oil cylinder internal leakage of the utility model, including tested oil cylinder 1 and by sliding block 3 with
The load cylinder 2 that tested oil cylinder 1 connects.Magnetic displacement transducer 4 is installed, tested 1 two hydraulic fluid ports of oil cylinder are connected on sliding block 3
First oil inlet and oil return pipe 5 is equipped with a pair of first solenoid directional control valve 11 on first oil inlet and oil return pipe 5 and controls into, oil return.Tested oil cylinder 1
Two oil ports are equipped with hydraulic control one-way valve 6 on the first oil inlet and oil return pipe 5.
2 two hydraulic fluid ports of load cylinder are connected with the second oil inlet and oil return pipe 8, and the second oil inlet and oil return pipe 8 is equipped with a pair of second electromagnetism
Reversal valve 9 is controlled into, oil return.
Tested oil cylinder 1 and the piston rod of load cylinder 2 are oppositely arranged, and are connected on sliding block 3, and magnetic is equipped on sliding block 3
The reading head of property displacement sensor 4.The magnetic grid of magnetic displacement transducer 4 is installed in the total travel of piston rod movement.Tested oil cylinder 1
It is fixed on rack with 2 both ends of load cylinder, is controlled into, oil return by the first solenoid directional control valve 11, the second solenoid directional control valve 9.
Tested 1 two hydraulic fluid ports of oil cylinder install hydraulic control one-way valve 6, ensure the leakproofness of test process oil circuit.
When system works, the second solenoid directional control valve first is moved to middle position, and hydraulic control one-way valve 6 is opened, the first electromagnetic switch
The control of valve 11 is tested oil cylinder 1 and is moved to stroke centre position, and subsequent first solenoid directional control valve 11 is placed in middle position, hydraulic control one-way valve 6
Locking is tested 1 oil circuit of oil cylinder and closes.The second solenoid directional control valve 9 is placed in right position, b mouthfuls of pressurizations at this time, and 2 rodless cavity of load cylinder adds
Pressure pushes and is tested oil cylinder 1.Since tested 1 oil circuit of oil cylinder is locked, piston rod will not move, but the rodless cavity of tested oil cylinder 1 can be
The lower squeeze cylinder inner fluid of piston thrust effect, makes rodless cavity pressure rise to operating pressure.At this point, rodless cavity fluid is made in pressure
It is leaked to rod chamber with lower, rodless cavity inner fluid is reduced, and piston can be moved to the left small distance.Magnetic displacement transducer 4 can
Accurately to measure the displacement distance of oil cylinder piston, the fluid volume of internal leakage is further calculated out by oil cylinder piston area.
Due to being equipped with 4 high resolution of magnetic displacement transducer on sliding block 3, typical hydraulic cylinder leakage rate can be realized very
High resolution ratio, for the product of identical leakage rate, which tests system can be shorter relative to flowmeter
Leakage volume is measured in time.Measurement result is read by sensor simultaneously, can be easily integrated into automated system, can be real
Existing Self-pressurizing agri, automatic measurement, measurement result are read automatically by equipment, and speed is fast.
Systematic survey internal leakage is tested in the oil cylinder internal leakage, has stronger adaptation for minimum gas that may be present in oil cylinder
Property, the volume that gas can be compressed to very little in tested oil cylinder pressurization side by powerful oil pressure even liquefies, is not pressurized when leaking to
Behind side, gas volume increase will not influence the displacement of piston, therefore avoid measurement error factor that may be present, measure
Precision is high.
The embodiment of the utility model is explained in detail above in association with attached drawing, but the utility model is not limited to be retouched
The embodiment stated.For a person skilled in the art, right in the case where not departing from the utility model principle and spirit
These embodiments carry out a variety of change, modification, replacement and modification, still fall in the scope of protection of the utility model.
Claims (3)
1. system is tested in a kind of oil cylinder internal leakage, it is characterised in that：Including tested oil cylinder and pass through sliding block and the tested oil
The load cylinder of cylinder connection, is equipped with magnetic displacement transducer on the sliding block, and two hydraulic fluid ports of the tested oil cylinder are connected with the
One oil inlet and oil return pipe is equipped with a pair of first solenoid directional control valve on the first oil inlet and oil return pipe and controls into, oil return, the tested oil cylinder
Two oil ports are equipped with hydraulic control one-way valve on the first oil inlet and oil return pipe；Two hydraulic fluid ports of the load cylinder are connected with second
Oil inlet and oil return pipe is equipped with a pair of second solenoid directional control valve on the second oil inlet and oil return pipe and controls into, oil return.
2. system is tested in oil cylinder internal leakage according to claim 1, it is characterised in that：The tested oil cylinder, load cylinder
It is each attached on rack.
3. system is tested in oil cylinder internal leakage according to claim 1, it is characterised in that：The tested oil cylinder, load cylinder
Piston rod be oppositely arranged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721896679.2U CN207921030U (en) | 2017-12-29 | 2017-12-29 | A kind of oil cylinder internal leakage test system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721896679.2U CN207921030U (en) | 2017-12-29 | 2017-12-29 | A kind of oil cylinder internal leakage test system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207921030U true CN207921030U (en) | 2018-09-28 |
Family
ID=63615708
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721896679.2U Expired - Fee Related CN207921030U (en) | 2017-12-29 | 2017-12-29 | A kind of oil cylinder internal leakage test system |
Country Status (1)
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| CN (1) | CN207921030U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110702337A (en) * | 2019-09-20 | 2020-01-17 | 中联重科股份有限公司 | Leak test device and leak test method |
| CN111089724A (en) * | 2020-01-15 | 2020-05-01 | 阳泉煤业华鼎机械有限公司 | Sealing detection test bed |
| CN111217298A (en) * | 2018-11-26 | 2020-06-02 | 徐州徐工液压件有限公司 | Automatic attitude adjusting device and method based on intelligent sensor digital hydraulic cylinder |
| CN113029452A (en) * | 2021-04-12 | 2021-06-25 | 浙江银轮机械股份有限公司 | Leakage amount detection device |
-
2017
- 2017-12-29 CN CN201721896679.2U patent/CN207921030U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111217298A (en) * | 2018-11-26 | 2020-06-02 | 徐州徐工液压件有限公司 | Automatic attitude adjusting device and method based on intelligent sensor digital hydraulic cylinder |
| CN110702337A (en) * | 2019-09-20 | 2020-01-17 | 中联重科股份有限公司 | Leak test device and leak test method |
| CN111089724A (en) * | 2020-01-15 | 2020-05-01 | 阳泉煤业华鼎机械有限公司 | Sealing detection test bed |
| CN111089724B (en) * | 2020-01-15 | 2022-04-01 | 阳泉煤业华益机械有限公司 | Sealing detection test bed |
| CN113029452A (en) * | 2021-04-12 | 2021-06-25 | 浙江银轮机械股份有限公司 | Leakage amount detection device |
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180928 Termination date: 20181229 |
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| CF01 | Termination of patent right due to non-payment of annual fee |