CN105526210A - Method and device for measuring micro inner leakage amount of any stroke position of hydraulic cylinder - Google Patents
Method and device for measuring micro inner leakage amount of any stroke position of hydraulic cylinder Download PDFInfo
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- CN105526210A CN105526210A CN201610019569.1A CN201610019569A CN105526210A CN 105526210 A CN105526210 A CN 105526210A CN 201610019569 A CN201610019569 A CN 201610019569A CN 105526210 A CN105526210 A CN 105526210A
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B19/00—Testing; Calibrating; Fault detection or monitoring; Simulation or modelling of fluid-pressure systems or apparatus not otherwise provided for
- F15B19/005—Fault detection or monitoring
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/80—Other types of control related to particular problems or conditions
- F15B2211/87—Detection of failures
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- Fluid Mechanics (AREA)
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- General Engineering & Computer Science (AREA)
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Abstract
The invention discloses a method and device for measuring the micro inner leakage amount of any stroke position of a hydraulic cylinder. According to the method for measuring the micro inner leakage amount of any stroke position of the hydraulic cylinder, the liquid level changes of an oil return circuit of the tested hydraulic cylinder and displacement changes of a piston are detected through a method that a loading cylinder horizontal loading test device is combined with a liquid level sensor and a displacement sensor and are converted into the volume changes of hydraulic oil, and then the volume difference of the volume changes of the hydraulic oil is divided by the effective measurement time, so that the inner leakage amount value is obtained. The device for measuring the micro inner leakage amount of any stroke position of the hydraulic cylinder comprises the loading cylinder horizontal loading test device, the liquid level sensor, an oil collection container and the displacement sensor, wherein the liquid level sensor and the oil collection container are installed on the oil return circuit of the tested hydraulic cylinder, and the displacement sensor is connected with the piston rod of the tested hydraulic cylinder. By means of the method and device, the micro inner leakage amount of any stroke position of the hydraulic cylinder can be measured, the sensors are used for guaranteeing the measurement accuracy, and the method and device have the advantage of high measurement accuracy.
Description
Technical field
The present invention relates to the small internal leakage method of measurement in a kind of oil hydraulic cylinder arbitrary distance of run position and device, particularly relate to the hydraulic cylinder interior leakage leakage quantity detection that inner wall of cylinder exists local damage, belong to leak detection technology field.
Background technique
The modal fault of oil hydraulic cylinder is internal leakage, causes it to produce reason of internal leakage and mainly contains: the pulling of inner wall of cylinder, wear and tear and the damage of piston seal.According to the regulation of performance requirement in JB/T10205-2010 " oil hydraulic cylinder ", all need to measure its internal leakage when carrying out type inspection and factory inspection to oil hydraulic cylinder, method of measurement is set forth in GB GB/T15622-2005 " oil hydraulic cylinder test method ", the testing apparatus carrying out measuring has loading cylinder horizontal addload testing apparatus and weight analog loading test device, the method that in GB GB/T15622-2005 " oil hydraulic cylinder test method ", internal leakage is measured is described as " making tested hydraulic cylinder works chamber oil-feed, be forced into rated pressure or user's specified pressure, measure the leakage rate leaking to non-pressurizing chamber through piston ", and in the method, the position specifically how measuring stroke when piston leaks to the leakage rate of non-pressurizing chamber and measures is not described in detail.
Hydraulic cylinder interior leakage leaks current method of measurement and mainly contains: pressurize method, sedimentation, the direct method of measurement.Wherein, pressurize method cannot be quantitative measure internal leakage; Sedimentation measurement error more greatly cannot the small internal leakage of Measurement accuracy; The position that the direct method of measurement is measured can only be in the two ends of hydraulic cylinder travel, then cannot measure when oil hydraulic cylinder arbitrary distance of run position inner wall of cylinder is existed and pulls or wear and tear, the internal leakage of patent CN202441672U hydraulic jack detects in apparatus and refer to use lubricating cup, change by observing its liquid level scale and measure internal leakage, but this measuring device is only applicable to the internal leakage measuring hydraulic cylinder travel two ends.
At present, measure the internal leakage of a certain position in hydraulic cylinder travel, method is that piston is parked in the position needing to measure internal leakage by the weight that loaded hydraulic cylinder is certain, as patent CN202690588U, internal leakage is calculated by the change in location measuring hydraulic cylinder piston rod when tested oil hydraulic cylinder produces and leaks, but this test method have ignored tested oil hydraulic cylinder due to fluid to be compressed, the piston position that Sealing extruding is leaked with hydraulic valve piece and caused changes, the Volume Changes that this change in location causes can have a strong impact on the degree of accuracy of small internal leakage test, time simultaneously for the internal leakage measured under different loads pressure, this device needs not stop to change load weight, thus, design a kind of device that accurately can be convenient for measuring oil hydraulic cylinder arbitrary distance of run position internal leakage to be extremely necessary.The present invention loads on cylinder horizontal addload testing apparatus basis in use GB GB/T15622-2005 " oil hydraulic cylinder test method " increases liquid level sensor, displacement transducer, fluid collecting container to carry out accurately measuring of arbitrary distance of run position internal leakage.
Summary of the invention
The present invention solves the technical problem existed in known technology to provide the small internal leakage method of measurement in a kind of oil hydraulic cylinder arbitrary distance of run position and device thereof.
The small internal leakage method of measurement in a kind of oil hydraulic cylinder arbitrary distance of run position, be characterized in: detecting method adopts the compound mode loading cylinder horizontal addload testing apparatus and liquid level sensor, displacement transducer, detect the liquid level variable signal of tested oil hydraulic cylinder oil circuit and the change in displacement signal of piston rod, two kinds of changing value indirect calculation are become the Volume Changes value of hydraulic oil, and both volume differences are internal leakage value divided by the working lipe of measuring.
Oil hydraulic cylinder arbitrary distance of run position of the present invention small internal leakage method of measurement can also take following technological scheme:
The described small internal leakage method of measurement in oil hydraulic cylinder arbitrary distance of run position, be characterized in: liquid level variable signal is obtained by the signal of data collecting card, process control machine collection liquid level sensor, in fluid collecting container, liquid level change obtains hydraulic oil Volume Changes with the product of useful area, this useful area is the difference of fluid collecting container sectional area and liquid level sensor probe head sectional area, and liquid level position when simultaneously starting to gather liquid level signal in fluid collecting container must flood the position that liquid level sensor can effectively be measured.
The described small internal leakage method of measurement in oil hydraulic cylinder arbitrary distance of run position, be characterized in: change in displacement signal is obtained by the signal of data collecting card, process control machine collection displacement transducer, the change in displacement of piston rod is multiplied by tested hydraulic cylinder cavity bulk area and obtains hydraulic oil volume changing value, the dead-center position of simultaneous displacement sensor and oil hydraulic cylinder zero stroke location matches.
The described small internal leakage method of measurement in oil hydraulic cylinder arbitrary distance of run position, is characterized in: record by liquid level sensor the moment that moment that liquid level rises suddenly and liquid level stop rising, the time lag between both moment is measures working lipe.
The described small internal leakage method of measurement in oil hydraulic cylinder arbitrary distance of run position, be characterized in: after the test pressure of tested hydraulic cylinder works chamber, the collection of start bit shifting signal and liquid level signal again, after terminating Deng displacement signal and liquid level signal collection, unload the test pressure of tested oil hydraulic cylinder again, to eliminate because fluid compression is extruded produced error with Sealing.
The small internal leakage measuring device in a kind of oil hydraulic cylinder arbitrary distance of run position, be characterized in: detection device comprises loading cylinder horizontal addload testing apparatus, liquid level sensor, fluid collecting container, displacement transducer, electromagnetic relief valve, liquid level sensor connects the oil return circuit of tested oil hydraulic cylinder, displacement transducer connects by hydraulic cylinder piston rod, and the oil circuit of loading hydraulic cylinder connects electromagnetic relief valve.
Oil hydraulic cylinder arbitrary distance of run position of the present invention small internal leakage measuring device can also take following technological scheme:
The described small internal leakage measuring device in oil hydraulic cylinder arbitrary distance of run position, be characterized in: liquid level sensor is fixed in fluid collecting container, the fluid collecting container the other end is connected with the return opening of tested oil hydraulic cylinder, and the probe head axis of liquid level sensor aligns with fluid collecting container center line and perpendicular to ground.
Advantage of the present invention and beneficial effect are:
Oil hydraulic cylinder arbitrary distance of run position small internal leakage method of measurement and device have employed new technological scheme, and compared with prior art, tool of the present invention has the following advantages: the internal leakage 1) measuring oil hydraulic cylinder arbitrary distance of run position; 2) can get rid of because fluid compression, Sealing extruding and hydraulic valve piece leak the impact of hydraulic cylinder interior leakage leakage quantity being measured to generation; 3) testing precision is high.The present invention can measure the internal leakage of oil hydraulic cylinder exactly, especially Barrel of Hydraulic Cylinders inwall is existed to the small internal leakage measurement of local damage generation.
Accompanying drawing explanation
Fig. 1 is the hydraulic system principle figure that the small internal leakage in oil hydraulic cylinder arbitrary distance of run position is measured.
Fig. 2 is the structural representation of the small internal leakage measuring device in oil hydraulic cylinder arbitrary distance of run position.
Fig. 3 is the flow chart of signal data acquisition.
Description of symbols in accompanying drawing: 1, tested circuit electromagnetic selector valve 2, stop valve 3, cylindrical tube 4, liquid level sensor 5, tested oil hydraulic cylinder 6, displacement transducer 7, loading hydraulic cylinder 8, one-way valve 9, loading circuit electromagnetic selector valve 10, electromagnetic relief valve 11, bed stand 12, hydraulic fitting 13, base for supporting 14, steel bar 15, adpting flange.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is elaborated.
Accompanying drawings 1, Fig. 2 and Fig. 3.
Embodiment 1
The small internal leakage method of measurement in a kind of oil hydraulic cylinder arbitrary distance of run position, adopt the compound mode loading cylinder horizontal addload testing apparatus and coordinate displacement transducer 6, liquid level sensor 4, loading hydraulic cylinder 7 and tested oil hydraulic cylinder 5 are fixed on bed stand 11, loading hydraulic cylinder 7 oil circuit connects electromagnetic relief valve 10 provides passive load, change by detecting liquid level in the change of tested oil hydraulic cylinder 5 piston rod position and cylindrical tube 3, indirect calculation obtains the internal leakage of tested oil hydraulic cylinder in a period of time.
Detecting liquid level change in cylindrical tube 3 is obtained by the signal of data collecting card, process control machine collection liquid level sensor 4, in cylindrical tube 3, liquid level change and the product of useful area are the overall product value that hydraulic oil in cylindrical tube 3 flows out, and this useful area is the difference of cylindrical tube 3 sectional area and liquid level sensor 4 probe head sectional area.
Detecting tested oil hydraulic cylinder 5 piston rod change in displacement is obtained by the signal of data collecting card, process control machine collection displacement transducer 6, and the change in displacement of piston rod is multiplied by the hydraulic oil volume changing value that tested oil hydraulic cylinder useful area obtains the generation of piston rod position minute movement.
Internal leakage is measured working lipe and is recorded by liquid level sensor 4 moment that moment that liquid level rises suddenly and liquid level stop rising, and the time lag between both moment is measurement working lipe.
Liquid level sensor 4 is measured total volume that in the cylindrical tube 3 that obtains, hydraulic oil flows out and is deducted displacement transducer 6 and measure hydraulic oil Volume Changes because piston rod position minute movement produces, the difference of two volumes with measure working lipe ratio and be the internal leakage value of measurement.
Embodiment 2
A kind of oil hydraulic cylinder arbitrary distance of run position small internal leakage measuring device comprises tested oil hydraulic cylinder 5, loading hydraulic cylinder 7, adpting flange 15, base for supporting 13, bed stand 11, displacement transducer 6, steel bar 14, cylindrical tube 3, liquid level sensor 4, hydraulic fitting 12, tested oil hydraulic cylinder 5, loading hydraulic cylinder 7 are fixed on bed stand 11 by supporting base 12, and tested oil hydraulic cylinder 5 piston rod head is connected with loading hydraulic cylinder 7 by adpting flange 15.
Base for supporting 13 vertically stands on bed stand 11, tested oil hydraulic cylinder 5 is fastened on base for supporting 13 with loading hydraulic cylinder 7 by adpting flange 15, tested oil hydraulic cylinder 5 piston club head is connected with loading hydraulic cylinder 7 by adpting flange 15, and tested oil hydraulic cylinder 5 is alignd with the central axis of loading hydraulic cylinder 7.
Displacement transducer 6 is fixed by screws on base for supporting 13, the joint of the bracing wire the other end is fixed by screws on steel bar 14, steel bar 14 the other end is holed and is used bolt and adpting flange 15 to be fixed on piston rod head, make displacement transducer 6 bracing wire, piston rod center line and steel bar 14 centerline at the same plane perpendicular to ground, and displacement transducer 6 bracing wire and piston rod center line are at this plane in parallel.
Liquid level sensor 4 is fixed in cylindrical tube 3, cylindrical tube 3 the other end and hydraulic fitting 12 are bound up, hydraulic fitting 12 the other end connects the oil outlet of tested oil hydraulic cylinder 5, ensure the center line alignment of cylindrical tube 3 center line, hydraulic fitting 12, the probe head axis of liquid level sensor 4 aligns with cylindrical tube 3 center line and perpendicular to ground.
The variable signal obtaining the displacement of tested oil hydraulic cylinder 5 piston rod measured by displacement transducer 6 by data collecting card, process control machine, liquid level sensor 4 measures the variable signal obtaining liquid level in cylindrical tube 3 by data collecting card, process control machine.
Loading hydraulic cylinder 7 oil circuit is installed electromagnetic relief valve 10 and is simulated the load of tested oil hydraulic cylinder 5 to carry out internal leakage measurement, by arranging the value of electromagnetic relief valve 10, makes the required power promoting loading hydraulic cylinder 7 be greater than the ouput force of tested oil hydraulic cylinder 5.
The concrete operation step of the present embodiment:
The first step: the stroke being regulated tested oil hydraulic cylinder 5 by displacement transducer 6, tested oil hydraulic cylinder 5 piston is parked in needs to measure the position of internal leakage, regulate the pressure of electromagnetic relief valve 10 on loading hydraulic cylinder 7 oil circuit, the passive load making it be formed is greater than the ouput force of tested oil hydraulic cylinder 5, make the initial level of measurement flood the probe head of liquid level sensor 4 to adding some hydraulic oil in cylindrical tube 3, starting pump group provides the pressure of design to tested oil hydraulic cylinder 5 rodless cavity and keeps.
Second step: actuating signal capture program, starts to gather displacement signal and liquid level signal, after arriving the measurement time of setting, and first shutdown signal capture program, and then give the pressure release of tested oil hydraulic cylinder 5 active chamber.
3rd step: the value H of record liquid level sensor 4 initial time
1, record liquid level sensor 4 signal stops the value H gathering the moment
2and the signals collecting time T of correspondence, the value S of recorded bit displacement sensor 6 initial time
1with the value S in displacement transducer 6 end moment
2.
4th step: the internal leakage that indirect calculation obtains tested oil hydraulic cylinder 5 is carried out to the signal collected.Calculate difference of liquid level Δ H=H
2-H
1, the Δ T=T and the displacement difference Δ S=S of piston rod movement working lipe of signals collecting
2-S
1, the diameter of setting cylindrical tube 3 is d
1, the diameter of liquid level sensor 4 probe head is d
2, calculate the hydraulic oil volume changes delta V because liquid level change produces
1:
Setting tested oil hydraulic cylinder 5 internal diameter of cylinder is D, and diameter of piston rod is d, calculates the hydraulic oil volume changes delta V because piston rod position change produces
2:
Convolution (1), formula (2) and measurement Δ T working lipe, obtain leakage rate Δ q by formula:
The present invention is not limited to above-mentioned two embodiments, also can have improvement or the change of other form, only otherwise exceed the protection domain of claim of the present invention, all belongs to protection scope of the present invention.
Claims (7)
1. the small internal leakage method of measurement in oil hydraulic cylinder arbitrary distance of run position, it is characterized in that: method of measurement adopts loading cylinder horizontal addload testing apparatus to make tested oil hydraulic cylinder rest on the arbitrary position of internal leakage detection, hydraulic oil liquid level variable signal is gathered by liquid level sensor, piston rod change in displacement signal is gathered by displacement transducer, the liquid level variable signal collected and change in displacement signal are converted into the Volume Changes value of hydraulic oil, calculate the convert bulking value that obtains of liquid level signal to deduct displacement signal and to convert the bulking value obtained, by this difference divided by measuring the internal leakage obtaining oil hydraulic cylinder working lipe.
2. the small internal leakage method of measurement in oil hydraulic cylinder arbitrary distance of run position according to claim 1, it is characterized in that: the Volume Changes value that change in displacement produces is the product of piston rod displacement signal variable quantity and hydraulic cylinder cavity bulk area, the Volume Changes value that liquid level change produces is the product of liquid level signal variable quantity and net sectional area.
3. the small internal leakage method of measurement in oil hydraulic cylinder arbitrary distance of run position according to claim 1, it is characterized in that: record by liquid level sensor the moment that moment that liquid level rises suddenly and liquid level stop rising, the time lag between both moment is measures working lipe.
4. the small internal leakage method of measurement in oil hydraulic cylinder arbitrary distance of run position according to claim 1, it is characterized in that: first to tested hydraulic cylinder works cavity pressure, start the collection of sensor signal again, after terminating Deng collecting sensor signal, unload tested hydraulic cylinder works cavity pressure again, to eliminate because fluid compression is extruded caused measurement error with Sealing.
5. the small internal leakage method of measurement in oil hydraulic cylinder arbitrary distance of run position according to claim 1, is characterized in that: measure initial time, must flood the position that liquid level sensor can effectively be measured in fluid trap during liquid level position.
6. the small internal leakage measuring device in oil hydraulic cylinder arbitrary distance of run position, it is characterized in that: measuring device comprises loading cylinder horizontal addload testing apparatus, fluid collecting container, liquid level sensor, displacement transducer, and liquid level sensor and fluid collecting container are arranged on the oil return circuit of tested oil hydraulic cylinder.
7. the small internal leakage measuring device in oil hydraulic cylinder arbitrary distance of run position according to claim 6, it is characterized in that: liquid level sensor one end connects fluid collecting container, the tested oil hydraulic cylinder return opening of another termination of fluid collecting container, and fluid collecting container center line is alignd and perpendicular to ground with the probe head center line of liquid level sensor.
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106762947A (en) * | 2016-12-30 | 2017-05-31 | 河海大学常州校区 | A kind of single-action hydraulic cylinder shown with internal leakage |
| CN106762946A (en) * | 2016-12-30 | 2017-05-31 | 河海大学常州校区 | A kind of single-action hydraulic cylinder shown with internal leakage |
| CN106837932A (en) * | 2017-03-06 | 2017-06-13 | 山东钢铁股份有限公司 | Detection means and detection method are let out in a kind of conticaster crystallizer vibrating servoBcylinder |
| CN107642518A (en) * | 2017-10-19 | 2018-01-30 | 无锡必克液压股份有限公司 | The flow regeneration test device and method of testing of a kind of engineering machinery operating cylinder |
| CN109026903A (en) * | 2018-08-17 | 2018-12-18 | 张晓腾 | Engineering machinery hydraulic cylinder dynamic performance integrated test platform |
| CN109282953A (en) * | 2018-11-09 | 2019-01-29 | 成都珂睿科技有限公司 | It is a kind of for detecting the device and its test method of the interior breakthrough rate of check valve |
| CN110552933A (en) * | 2019-08-30 | 2019-12-10 | 徐州徐工液压件有限公司 | Device and method for monitoring leakage rate in hydraulic cylinder in real time |
| 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 |
| CN110748531A (en) * | 2019-10-12 | 2020-02-04 | 王勐 | Device for testing liquid leakage amount |
| CN111075794A (en) * | 2020-01-10 | 2020-04-28 | 上海振华重工(集团)股份有限公司 | Method and device for monitoring leakage of hydraulic system |
| CN114136680A (en) * | 2021-11-29 | 2022-03-04 | 中铁隧道局集团有限公司 | Laser type shield/TBM grease real-time measuring device and measuring method |
| CN114483712A (en) * | 2022-02-04 | 2022-05-13 | 浙江大学 | Hydraulic cylinder micro-internal leakage detection test bed and detection method thereof |
| CN114483711A (en) * | 2022-02-04 | 2022-05-13 | 浙江大学 | Constant parameter method for detecting and evaluating leakage in hydraulic cylinder and detection device thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1682648A1 (en) * | 1988-03-02 | 1991-10-07 | Подмосковный Филиал Государственного Союзного Научно-Исследовательского Тракторного Института Нати | Method of measuring of rate of leakage of working fluid over piston and rod of hydraulic cylinder and device for performing such measurements |
| CN101929490A (en) * | 2009-06-22 | 2010-12-29 | 西门子公司 | Leak detection system in the wind turbine |
| CN102252007A (en) * | 2010-05-18 | 2011-11-23 | 南京梅山冶金发展有限公司 | Hydraulic cylinder test device and method under simulated working condition |
| CN203412845U (en) * | 2013-06-25 | 2014-01-29 | 南京梅山冶金发展有限公司 | Portable online oil cylinder internal leakage detecting device |
| CN205047582U (en) * | 2015-10-22 | 2016-02-24 | 山东科技大学 | Leak testing system in compound pneumatic cylinder |
-
2016
- 2016-01-13 CN CN201610019569.1A patent/CN105526210B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1682648A1 (en) * | 1988-03-02 | 1991-10-07 | Подмосковный Филиал Государственного Союзного Научно-Исследовательского Тракторного Института Нати | Method of measuring of rate of leakage of working fluid over piston and rod of hydraulic cylinder and device for performing such measurements |
| CN101929490A (en) * | 2009-06-22 | 2010-12-29 | 西门子公司 | Leak detection system in the wind turbine |
| CN102252007A (en) * | 2010-05-18 | 2011-11-23 | 南京梅山冶金发展有限公司 | Hydraulic cylinder test device and method under simulated working condition |
| CN203412845U (en) * | 2013-06-25 | 2014-01-29 | 南京梅山冶金发展有限公司 | Portable online oil cylinder internal leakage detecting device |
| CN205047582U (en) * | 2015-10-22 | 2016-02-24 | 山东科技大学 | Leak testing system in compound pneumatic cylinder |
Non-Patent Citations (1)
| Title |
|---|
| 李阳等: "工程机械液压缸内外泄漏模拟实验(英文)", 《机床与液压》 * |
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| CN106762946A (en) * | 2016-12-30 | 2017-05-31 | 河海大学常州校区 | A kind of single-action hydraulic cylinder shown with internal leakage |
| CN106762947B (en) * | 2016-12-30 | 2018-05-18 | 河海大学常州校区 | A kind of single-action hydraulic cylinder shown with internal leakage |
| CN106762946B (en) * | 2016-12-30 | 2018-05-18 | 河海大学常州校区 | A kind of single-action hydraulic cylinder shown with internal leakage |
| CN106762947A (en) * | 2016-12-30 | 2017-05-31 | 河海大学常州校区 | A kind of single-action hydraulic cylinder shown with internal leakage |
| CN106837932A (en) * | 2017-03-06 | 2017-06-13 | 山东钢铁股份有限公司 | Detection means and detection method are let out in a kind of conticaster crystallizer vibrating servoBcylinder |
| CN107642518A (en) * | 2017-10-19 | 2018-01-30 | 无锡必克液压股份有限公司 | The flow regeneration test device and method of testing of a kind of engineering machinery operating cylinder |
| CN107642518B (en) * | 2017-10-19 | 2024-02-02 | 无锡必克液压股份有限公司 | Flow regeneration testing device and testing method for working cylinder of engineering machinery |
| CN109026903A (en) * | 2018-08-17 | 2018-12-18 | 张晓腾 | Engineering machinery hydraulic cylinder dynamic performance integrated test platform |
| CN109282953B (en) * | 2018-11-09 | 2023-10-27 | 成都珂睿科技有限公司 | Device for detecting internal leakage rate of one-way valve and testing method thereof |
| CN109282953A (en) * | 2018-11-09 | 2019-01-29 | 成都珂睿科技有限公司 | It is a kind of for detecting the device and its test method of the interior breakthrough rate of check valve |
| CN110552933A (en) * | 2019-08-30 | 2019-12-10 | 徐州徐工液压件有限公司 | Device and method for monitoring leakage rate in hydraulic cylinder in real time |
| 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 |
| CN110748531A (en) * | 2019-10-12 | 2020-02-04 | 王勐 | Device for testing liquid leakage amount |
| CN111075794B (en) * | 2020-01-10 | 2022-06-14 | 上海振华重工(集团)股份有限公司 | Method and device for monitoring leakage of hydraulic system |
| CN111075794A (en) * | 2020-01-10 | 2020-04-28 | 上海振华重工(集团)股份有限公司 | Method and device for monitoring leakage of hydraulic system |
| CN114136680A (en) * | 2021-11-29 | 2022-03-04 | 中铁隧道局集团有限公司 | Laser type shield/TBM grease real-time measuring device and measuring method |
| CN114136680B (en) * | 2021-11-29 | 2024-03-19 | 中铁隧道局集团有限公司 | Laser type shield/TBM grease real-time measurement device and measurement method |
| CN114483712A (en) * | 2022-02-04 | 2022-05-13 | 浙江大学 | Hydraulic cylinder micro-internal leakage detection test bed and detection method thereof |
| CN114483711A (en) * | 2022-02-04 | 2022-05-13 | 浙江大学 | Constant parameter method for detecting and evaluating leakage in hydraulic cylinder and detection device thereof |
| CN114483711B (en) * | 2022-02-04 | 2022-11-29 | 浙江大学 | Constant parameter method for detecting and evaluating leakage in hydraulic cylinder and detection device thereof |
| WO2023147740A1 (en) * | 2022-02-04 | 2023-08-10 | 浙江大学 | Constant value parameter method for detecting and evaluating leakage in hydraulic cylinder and detection device thereof |
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