CN218564077U - Oil cylinder leakage detection device - Google Patents
Oil cylinder leakage detection device Download PDFInfo
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- CN218564077U CN218564077U CN202223036767.9U CN202223036767U CN218564077U CN 218564077 U CN218564077 U CN 218564077U CN 202223036767 U CN202223036767 U CN 202223036767U CN 218564077 U CN218564077 U CN 218564077U
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- 238000001514 detection method Methods 0.000 title claims description 21
- 238000006073 displacement reaction Methods 0.000 claims abstract description 47
- 238000012360 testing method Methods 0.000 claims abstract description 17
- 238000012545 processing Methods 0.000 claims description 10
- 238000005259 measurement Methods 0.000 abstract description 10
- 239000012530 fluid Substances 0.000 abstract description 3
- 239000003921 oil Substances 0.000 description 61
- 239000010720 hydraulic oil Substances 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
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- 239000002184 metal Substances 0.000 description 1
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Abstract
The utility model discloses a hydro-cylinder leak testing device, include by test hydro-cylinder, measurement hydro-cylinder, displacement sensor and hydraulic pump, it includes first chamber and second chamber to be tested the hydro-cylinder, hydraulic pump connection with by the test hydro-cylinder first chamber, the measurement hydro-cylinder includes third chamber and fourth chamber, the third chamber connect in by the test hydro-cylinder the second chamber, displacement sensor is used for detecting the displacement of the first piston rod of measurement hydro-cylinder. The utility model discloses an among the hydro-cylinder leak testing device, the structure is comparatively simple, and converts into the measurement hydro-cylinder through the fluid that will be leaked by the test hydro-cylinder, can sensitively sense what of leaking the leakage quantity, and it is higher to detect the precision.
Description
Technical Field
The utility model relates to the field of hydraulic techniques, especially, relate to a hydro-cylinder leak testing device.
Background
The oil cylinder is an important component part in a hydraulic system of engineering machinery such as an excavator, a concrete pump truck, a rotary drilling rig and the like, is also an energy conversion device, is an energy conversion equipment for converting hydraulic energy into linear motion mechanical work, and is widely applied to various industries. However, in practical applications, the oil cylinder is very susceptible to leakage, which is divided into internal and external leakage. The internal leakage in the actual working condition can affect the working efficiency and the performance of the hydraulic cylinder, and the normal work can not be carried out in serious conditions.
At present, the oil cylinder leakage amount is generally determined by directly measuring the internal leakage oil amount or measuring the pressure value of the oil cylinder. However, the minimum detection range of the current flow meter in the market is 2ml/min, the leakage rate of the double-acting oil cylinder is generally 0.03-1.10 ml/min, and the leakage rate of the single-acting oil cylinder is generally 0.06-1.80 ml/min, so the leakage rate in the oil cylinder cannot be accurately measured by directly measuring the leakage oil amount; the method for measuring the pressure value of the oil cylinder has the disadvantages of complex detection system structure and high cost.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a detect the higher, simple structure's of precision hydro-cylinder leak testing device.
The utility model provides a hydro-cylinder leak testing device, include by test hydro-cylinder, measurement hydro-cylinder, displacement sensor and hydraulic pump, it includes first chamber and second chamber to be tested the hydro-cylinder, hydraulic pump connection with by the test hydro-cylinder first chamber, the measurement hydro-cylinder includes third chamber and fourth chamber, the third chamber connect in by the test hydro-cylinder the second chamber, displacement sensor is used for detecting the displacement of the first piston rod of measurement hydro-cylinder.
In one embodiment, the fourth cavity of the metering cylinder is connected to an oil tank for returning oil.
In one embodiment, the volumes of the third chamber and the fourth chamber of the metering cylinder are smaller than the volumes of the first chamber and the second chamber of the tested cylinder.
In one embodiment, the displacement sensor is a non-contact displacement sensor.
In one embodiment, an oil outlet of the hydraulic pump is connected to the first cavity of the tested oil cylinder, the oil cylinder leakage detection device further comprises an oil tank and an engine, the oil tank is used for supplying oil to the hydraulic pump, and the engine is used for driving the hydraulic pump to work.
In one embodiment, the cylinder leakage detection device further comprises an oil filter connected with an oil inlet of the hydraulic pump; the oil cylinder leakage detection device further comprises an overflow valve, a control oil port and a first oil port of the overflow valve are connected to an oil outlet of the hydraulic pump, and a second oil port of the overflow valve is connected to the oil tank.
In one embodiment, the oil cylinder leakage detection device further comprises an amplifier, the amplifier is connected to the displacement sensor, and the amplifier is used for amplifying the electric signal output by the displacement sensor.
In one embodiment, the oil cylinder leakage detection device further comprises a processing module, the processing module is connected to the amplifier, and the processing module obtains the internal leakage amount of the tested oil cylinder according to the relation between the internal leakage amount of the oil cylinder and the displacement of the metering oil cylinder.
The utility model discloses an among the breaker unit, the structure is comparatively simple, and converts into the measurement hydro-cylinder through the fluid that will be leaked by the test hydro-cylinder, can sensitively sense what of leaking the leakage quantity, and it is higher to detect the precision.
Drawings
Fig. 1 is a schematic structural view of an oil cylinder leakage detection device according to an embodiment of the present invention.
Fig. 2 is a graph showing a relationship between an energy pulse intensity and a distance of a displacement sensor used in the cylinder leakage detecting apparatus shown in fig. 1.
Fig. 3 is a diagram showing a relationship between an amount of leakage in a cylinder and a position of a metering cylinder in the cylinder leakage detecting apparatus shown in fig. 1.
Detailed Description
To further illustrate the technical means and functions of the present invention for achieving the intended purpose, the following detailed description of the embodiments, structures, features and functions of the present invention will be given with reference to the accompanying drawings and examples.
As shown in fig. 1, the cylinder leakage detecting device according to an embodiment of the present invention includes a tested cylinder 11, a metering cylinder 13, a displacement sensor 15, and a hydraulic pump 17. The tested oil cylinder 11 comprises a first cavity 112 and a second cavity 114, and the hydraulic pump 17 is connected with the first cavity 112 of the tested oil cylinder 11. The metering cylinder 13 comprises a third chamber 132 and a fourth chamber 134, and the third chamber 132 is connected to the second chamber 114 of the cylinder 11 to be tested. The displacement sensor 15 is used for detecting the displacement of the first piston rod 136 of the metering cylinder 13.
Among the hydro-cylinder leakage detection device of this embodiment, the structure is comparatively simple, and converts the fluid that is leaked by the test hydro-cylinder into the measurement hydro-cylinder, can sensitively sense leak quantity what, and detection precision is higher.
In this embodiment, the tested oil cylinder 11 further includes a second piston rod 116, one end of the second piston rod 116 is provided with a piston, and the piston of the second piston rod 116 divides the tested oil cylinder 11 into a first chamber 112 and a second chamber 114. Specifically, the first chamber 112 is a rodless chamber and the second chamber 114 is a rod chamber. It will be appreciated that the first chamber 112 may be a rod chamber and the second chamber 114 may be a rodless chamber, i.e. the metering cylinder 13 may be connected to either a rod or a rodless chamber.
In this embodiment, the fourth chamber 134 of the metering cylinder 13 is connected to the oil tank for oil return. Specifically, the third chamber 132 is a rodless chamber and the fourth chamber 134 is a rod chamber. It is understood that the connection with the second chamber 114 of the tested cylinder 11 can be a rod chamber or a rodless chamber. Specifically, one end of the first piston rod 136 of the metering cylinder 13 is provided with a piston, and the piston of the first piston rod 136 divides the metering cylinder 13 into the third cavity 132 and the fourth cavity 134.
Specifically, the volumes of the third chamber 132 and the fourth chamber 134 of the metering cylinder 13 are less than the volumes of the first chamber 112 and the second chamber 114 of the cylinder 11 under test.
In the present embodiment, the displacement sensor 15 is a non-contact displacement sensor. Specifically, the displacement sensor 15 may be a magnetic displacement sensor. Specifically, an alternating magnetic field is generated on the surface of the magnetic displacement sensor, when the first piston rod 136 of the metering cylinder 13 approaches the surface of the magnetic displacement sensor, eddy current is generated in metal, the energy of the vibrator is absorbed, and then the displacement change of the metering cylinder 13 is determined according to the attenuation change of the energy. Specifically, when the intensity of the energy pulse sensed by the magnetic displacement sensor changes, the displacement of the first piston rod 136 can be obtained according to the relationship between the intensity of the energy pulse and the distance shown in fig. 2. The relationship between the energy pulse intensity and the distance can be experimentally measured. It will be appreciated that the displacement sensor 15 may be an infrared displacement sensor or other type of sensor.
In this embodiment, an oil outlet of the hydraulic pump 17 is connected to the first cavity 112 of the tested cylinder 11, the cylinder leakage detecting apparatus further includes an oil tank 19 and an engine 21, the oil tank 19 is used for supplying oil to the hydraulic pump 17, and the engine 21 is used for driving the hydraulic pump 17 to operate, so that the hydraulic pump 17 supplies pressure oil to the tested cylinder 11.
In this embodiment, the cylinder leakage detecting apparatus further includes an oil filter 23 connected to an oil inlet of the hydraulic pump 17, for filtering hydraulic oil entering the hydraulic pump 17.
In this embodiment, the oil cylinder leakage detection device further includes an overflow valve 27, a control oil port and a first oil port of the overflow valve 27 are both connected to the oil outlet of the hydraulic pump 17, and a second oil port of the overflow valve 27 is connected to the oil tank 19. The relief valve 27 is used to relief a pressure oil path output from the hydraulic pump 17.
In this embodiment, the cylinder leakage detecting device further includes an amplifier 29, and the amplifier 29 is connected to the displacement sensor 15. The amplifier 29 is used to amplify the electric signal output from the displacement sensor 15. The amplifier 29 may include a cascode circuit, or a cascode circuit. By arranging the amplifier 29, the output signal can be effectively amplified and converted and output again in the hydraulic system as a signal amplifier, so that the displacement of the metering oil cylinder can be monitored in real time, the displacement is converted into the corresponding leakage amount, the measurement of the leakage amount is indirectly realized, and the accuracy of the leakage amount can be further improved.
In this embodiment, the apparatus for detecting cylinder leakage further includes a processing module 31, the processing module 31 is connected to the amplifier 29, and the processing module 31 obtains the internal leakage amount of the tested cylinder 11 according to the relationship diagram between the internal leakage amount of the cylinder and the displacement of the metering cylinder shown in fig. 3. The relation between the internal leakage of the oil cylinder and the displacement of the metering oil cylinder can be measured according to experiments, and the relation between the internal leakage of the oil cylinder and the displacement of the metering oil cylinder can be prestored in the processing module 31.
When the cylinder leakage detection device of the embodiment works, the second piston rod 116 of the tested cylinder 11 extends to the extreme position, an oil port on one side of the first cavity 112 of the tested cylinder 11 is continuously pressurized within a rated pressure range, when the tested cylinder 11 has internal leakage, hydraulic oil in the first cavity 112 of the tested cylinder 11 leaks to the second cavity 114 and then enters the third cavity 132 of the metering cylinder 13, the hydraulic oil in the third cavity 132 pushes the first piston rod 136 to move leftward, and at this time, the displacement sensor 15 can detect that the displacement of the first piston rod 136 of the metering cylinder 13 changes; when the tested oil cylinder 11 has no internal leakage, the first piston rod 136 does not move, and the displacement sensor 15 does not detect the displacement change of the first piston rod 136. It can be seen that the internal leakage amount of the tested oil cylinder 11 can be detected according to the displacement amount of the displacement sensor 15.
The above is only a preferred embodiment of the present invention, and the present invention is not limited to the above embodiments, and although the present invention has been disclosed with the above preferred embodiments, but the present invention is not limited to the above embodiments, and any skilled person in the art can make some changes or modifications to equivalent embodiments without departing from the technical scope of the present invention, but all simple modifications, equivalent changes and modifications made to the above embodiments according to the technical spirit of the present invention still belong to the technical scope of the present invention.
Claims (8)
1. The oil cylinder leakage detection device is characterized by comprising a tested oil cylinder (11), a metering oil cylinder (13), a displacement sensor (15) and a hydraulic pump (17), wherein the tested oil cylinder (11) comprises a first cavity (112) and a second cavity (114), the hydraulic pump (17) is connected with the first cavity (112) of the tested oil cylinder (11), the metering oil cylinder (13) comprises a third cavity (132) and a fourth cavity (134), the third cavity (132) is connected with the second cavity (114) of the tested oil cylinder (11), and the displacement sensor (15) is used for detecting the displacement of a first piston rod (136) of the metering oil cylinder (13).
2. The cylinder leak detector arrangement according to claim 1, characterized in that the fourth chamber (134) of the metering cylinder (13) is connected to a tank for return oil.
3. The cylinder leak detection apparatus according to claim 1, characterized in that the volumes of the third chamber (132) and the fourth chamber (134) of the metering cylinder (13) are smaller than the volumes of the first chamber (112) and the second chamber (114) of the cylinder under test (11).
4. The cylinder leak detecting apparatus according to claim 1, wherein the displacement sensor (15) is a non-contact type displacement sensor.
5. The cylinder leak detection apparatus according to claim 1, wherein an oil outlet of the hydraulic pump (17) is connected to the first chamber (112) of the cylinder (11) under test, the cylinder leak detection apparatus further comprises an oil tank (19) and an engine (21), the oil tank (19) is used for supplying oil to the hydraulic pump (17), and the engine (21) is used for driving the hydraulic pump (17) to operate.
6. The cylinder leak detection apparatus according to claim 5, further comprising an oil filter (23) connected to an oil inlet of the hydraulic pump (17); the oil cylinder leakage detection device further comprises an overflow valve (27), a control oil port and a first oil port of the overflow valve (27) are connected to an oil outlet of the hydraulic pump (17), and a second oil port of the overflow valve (27) is connected to the oil tank (19).
7. The cylinder leak detection apparatus according to claim 1, further comprising an amplifier (29), wherein the amplifier (29) is connected to the displacement sensor (15), and the amplifier (29) is configured to amplify the electrical signal output from the displacement sensor (15).
8. The cylinder leakage detecting device according to claim 7, characterized in that the cylinder leakage detecting device further comprises a processing module (31), the processing module (31) is connected to the amplifier (29), and the processing module (31) obtains the internal leakage amount of the tested cylinder (11) according to the relation between the cylinder internal leakage amount and the metering cylinder displacement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223036767.9U CN218564077U (en) | 2022-11-15 | 2022-11-15 | Oil cylinder leakage detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223036767.9U CN218564077U (en) | 2022-11-15 | 2022-11-15 | Oil cylinder leakage detection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218564077U true CN218564077U (en) | 2023-03-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223036767.9U Active CN218564077U (en) | 2022-11-15 | 2022-11-15 | Oil cylinder leakage detection device |
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| Country | Link |
|---|---|
| CN (1) | CN218564077U (en) |
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- 2022-11-15 CN CN202223036767.9U patent/CN218564077U/en active Active
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