CN105697460A - High-precision hydraulic cylinder inner-leakage detection device - Google Patents
High-precision hydraulic cylinder inner-leakage detection device Download PDFInfo
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- CN105697460A CN105697460A CN201610260707.5A CN201610260707A CN105697460A CN 105697460 A CN105697460 A CN 105697460A CN 201610260707 A CN201610260707 A CN 201610260707A CN 105697460 A CN105697460 A CN 105697460A
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- hydraulic cylinder
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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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- General Engineering & Computer Science (AREA)
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Abstract
The invention discloses a high-precision hydraulic cylinder inner-leakage detection device which comprises a hydraulic cylinder inner-leakage detector, a pressure sensor A, a pressure sensor B, a displacement sensor and a hydraulic cylinder control loop, wherein the displacement sensor is connected between the hydraulic cylinder inner leakage detector and a to-be-detected hydraulic cylinder and is used for detecting a position signal of the to-be-detected hydraulic cylinder; the pressure sensor A is connected between the to-be-detected hydraulic cylinder and the hydraulic cylinder control loop and is used for acquiring pressure of one end of the hydraulic cylinder; the pressure sensor A is connected with the hydraulic cylinder inner-leakage detector; the pressure sensor B is connected between the to-be-detected hydraulic cylinder and the hydraulic cylinder control loop and is used for acquiring pressure of the other end of the hydraulic cylinder; the pressure sensor B is connected with the hydraulic cylinder inner-leakage detector. The high-precision hydraulic cylinder inner-leakage detection device disclosed by the invention can meet delivery test or various environments of use sites, is simple to operate, and needs no other hydraulic auxiliary loop in the detection process.
Description
Technical field
The invention belongs to technical field of hydraulic pressure, disclose a kind of high-precision hydraulic cylinder internal leakage detecting device, this device may be used for online that install or test bed testing hydraulic cylinder is carried out detection by quantitative and the analysis of internal leakage。
Background technology
Internal leakage, as hydraulic cylinder country and a quantitative target in industry standard, is for judging whether hydraulic cylinder meets the vaild evidence required when dispatching from the factory；In addition more situation is the hydraulic cylinder interior leakage leakage fault caused due to reasons such as abrasion, assemblings in on-the-spot online use procedure, it is necessary to qualitative analysis and quantitative index judge that hydraulic cylinder is the need of changing and maintenance。Owing to the detection of current testing stand needs additional a lot of other hydraulic circuit to carry out, and mostly taking the mode beginning to speak to drain the oil to test, this mode bothers and wastes hydraulic oil, contaminated environment。And the hydraulic cylinder that scene is online is detected, due to the restriction of condition, then it is more rely on the experience of individual or judge by simple and crude Pressure gauge, is difficult to detect quantitative data, also can not get convictive internal leakage evidence。Owing to hydraulic cylinder interior leakage leakage is relevant with the pressure differential at hydraulic cylinder two ends, can directly measure the interior discharge of hydraulic cylinder but without a instrument and device on the market at present and whether meet Standard。Additionally, due to the problem of the internal processing of hydraulic cylinder, can cause that hydraulic cylinder causes the leakage rate of diverse location is not of uniform size, currently also not have a instrument or device can measure the leakage rate of hydraulic cylinder total travel each point。
Summary of the invention
In view of this, it is an object of the invention to provide a kind of high-precision hydraulic cylinder internal leakage detecting device, the features such as this detecting device has measuring accuracy height, simple in construction, operation interface is easy to use, testing result is directly perceived, are suitably applied in hydraulic system to online that install or test bed testing hydraulic cylinder to carry out detection by quantitative and the analysis of internal leakage。
It is an object of the invention to be achieved through the following technical solutions, a kind of high-precision hydraulic cylinder internal leakage detecting device, leak detector 1, pressure transducer A6.1, pressure transducer B6.2, displacement transducer 4 and hydraulic control circuit including hydraulic cylinder interior leakage；Institute's displacement sensors is connected between hydraulic cylinder interior leakage leakage detector and detected hydraulic cylinder, for detecting the position signalling of hydraulic cylinder；Described pressure transducer A is connected to detected hydraulic cylinder and hydraulic cylinder controls between loop, and for obtaining the pressure of hydraulic cylinder one end, described pressure transducer A leaks detector with hydraulic cylinder interior leakage and is connected；Described pressure transducer B is connected to detected hydraulic cylinder and hydraulic cylinder controls between loop, and for obtaining the pressure of the hydraulic cylinder other end, described pressure transducer B leaks detector with hydraulic cylinder interior leakage and is connected。
Further, described pressure transducer A and hydraulic cylinder control to be connected to cut-out isolating valve A between loop。
Further, described pressure transducer B and hydraulic cylinder control to be connected to cut-out isolating valve B between loop。
Further, described hydraulic cylinder interior leakage leakage detector includes signal processing chip 13, A/D signal conversion module 12, interface circuit 11, digital display module 14 and data storage card 16, described A/D signal conversion module, digital display module, data storage card are connected with signal processing chip respectively, and described interface circuit is connected with A/D signal conversion module；Described power module is that power unit is powered。
Further, institute's displacement sensors is external displacement transducer。
Further, described external displacement transducer includes touch sensor and noncontacting proximity sensor。
Further, described touch sensor includes draw wire encoder。
Further, described noncontacting proximity sensor includes laser displacement sensor。
Owing to have employed technique scheme, present invention have the advantage that:
1. the hydraulic cylinder interior leakage device for detecting leakage that the present invention relates to, it is possible to meet and dispatch from the factory test or use on-the-spot various environment, simple to operate, detection process is without other hydraulic pressure subsidiary loops。
2. the hydraulic cylinder interior leakage device for detecting leakage that the present invention relates to, it does not have External leakage, does not waste hydraulic oil free from environmental pollution yet。
3. the hydraulic cylinder interior leakage device for detecting leakage that the present invention relates to, accuracy of detection is high, and detection data are simple and clear, it is possible to immediately arrive at testing result。
4. using after this invention, the demand according to detection work, detected data and conclusion can preserve in storage card, for work such as follow-up printing and analyses。
5. institute of the present invention with software consideration hydraulic cylinder two cavity pressure and the relation of leakage rate, have also contemplated that the oil compressibility impact for leakage rate simultaneously。
Accompanying drawing explanation
In order to make the object, technical solutions and advantages of the present invention clearly, below in conjunction with accompanying drawing, the present invention is described in further detail, wherein:
Fig. 1 is the structure principle chart of the present invention；
Fig. 2 is the schematic diagram of hydraulic cylinder interior leakage leakage detector in the present invention。
Detailed description of the invention
Below with reference to accompanying drawing, the preferred embodiments of the present invention are described in detail；Should be appreciated that preferred embodiment is only for illustrating the present invention, rather than in order to limit the scope of the invention。
Detection for hydraulic cylinder interior leakage leakage, test when no matter being dispatch from the factory, or the detection after in-site installation use, it is substantially consistent that it detects control principle substantially, as shown in Figure 1, the internal leakage detection work of hydraulic cylinder, need the hydraulic control circuit of hydraulic cylinder, cut-off loop is needed between hydraulic cylinder and hydraulic control circuit, additionally, in order to there is certain pressure reduction in hydraulic cylinder two chamber, in addition it is also necessary to hydraulic cylinder is with certain load, if load is little or non-loaded certainly, it is possible to allow hydraulic cylinder two chamber have certain pressure differential by other ways。
The present invention provides a kind of high-precision hydraulic cylinder internal leakage detecting device, leaks detector 1, pressure transducer A6.1, pressure transducer B6.2, displacement transducer 4 and hydraulic control circuit including hydraulic cylinder interior leakage；Institute's displacement sensors is connected between hydraulic cylinder interior leakage leakage detector and detected hydraulic cylinder, for detecting the position signalling of hydraulic cylinder；Described pressure transducer A is connected to detected hydraulic cylinder and hydraulic cylinder controls between loop, and for obtaining the pressure of hydraulic cylinder one end, described pressure transducer A leaks detector with hydraulic cylinder interior leakage and is connected；Described pressure transducer B is connected to detected hydraulic cylinder and hydraulic cylinder controls between loop, and for obtaining the pressure of the hydraulic cylinder other end, described pressure transducer B leaks detector with hydraulic cylinder interior leakage and is connected。
Described hydraulic cylinder interior leakage leakage detector includes signal processing chip 13, A/D signal conversion module 12, interface circuit 11, digital display module 14 and data storage card 16, described A/D signal conversion module, digital display module, data storage card are connected with signal processing chip respectively, and described interface circuit is connected with A/D signal conversion module；Described power module is that power unit is powered。
For the hydraulic cylinder interior leakage device for detecting leakage schematic diagram shown in Fig. 1, its specific implementation process is as follows: first ensure that before applying this detecting device detected hydraulic cylinder is in slave mode, such as the driving pressure of hydraulic cylinder, control speed, pipeline connection status etc.。Afterwards by pressure transducer wiring A2.1 cut-in pressure sensors A 6.1 and hydraulic cylinder interior leakage leakage detector 1, wherein pressure transducer A6.1 accesses one of them pressure oil cavity of detected oil cylinder 5；Equally, by pressure transducer wiring B2.2 cut-in pressure sensor B6.2 and hydraulic cylinder interior leakage leakage detector 1, wherein pressure transducer B6.2 accesses the another one pressure oil cavity of detected oil cylinder 5。High accuracy displacement sensor 4 and hydraulic cylinder interior leakage test leakage instrument 1 is connected by displacement transducer wiring 3, the displacement transducer actual condition according to detection scene, suitable position can be selectively mounted to, as in cylinder body, accessory device or interim mounting bracket, purpose is not have vibration influence, can be accurately detected Position of Hydraulic Cylinder signal；If having vibrations and install inconvenience, it is possible to use the measurement carrying out position of laser type sensor non-contact formula。Pressure transducer and displacement transducer have respective interface on hydraulic cylinder interior leakage test leakage instrument 1。Confirm that sensor is installed and each circuit is connected with pipeline under errorless premise, hydraulic cylinder interior leakage test leakage instrument 1 and pressure transducer A, pressure transducer B can be powered on displacement transducer, owing to the driving capacity of sensor is few, can be leaked, by hydraulic cylinder interior leakage, the power module 15 that detector 1 is with completely to power, it is not necessary to individually power again。Afterwards, it is possible to controlling loop 8 by hydraulic cylinder and drive detected oil cylinder 5 to move, hydraulic cylinder heavy burden simultaneously or stress 9 have also accessed in hydraulic cylinder system。Determine the position of hydraulic cylinder stop motion as required, after stop motion, by cutting off isolating valve 7.1A, cut off isolating valve 7.2B and cut off detected oil cylinder 5 and hydraulic cylinder control loop 8, then leak operation on detector 1 at hydraulic cylinder interior leakage to start to detect button, hydraulic cylinder interior leakage work formally starts, detector starts to process the data that analyte sensors gathers, the numerical value such as the size being calculated the internal leakage of this position by mathematical model also form numerical value form and curve, automatically about the index of hydraulic cylinder leakage rate in contrast GB, judge whether hydraulic cylinder leakage rate meets requirement, ultimately form an examining report, in the data storage card being saved in detector that examining report and its data can select, these data can be analyzed display on computers and print。
The operation principle of hydraulic cylinder interior leakage leakage detector is as follows: the analog value of pressure transducer and displacement transducer accesses A/D signal conversion module 12 by the interface circuit 11 in hydraulic cylinder interior leakage leakage detector, A/D signal conversion module transforms into digital quantity signal the signal of analog quantity and is transferred in signal processing chip 13, in signal processing chip 13, storage has the mathematics computing model of internal leakage, this model is by calculating the pressure differential at hydraulic cylinder two ends, again through gathering the position sensor data of returning, mathematical model further contemplates the oil compressibility impact for leaking rate formulas simultaneously, the data detected contrast with the GB data being stored in detector automatically, thus drawing more intuitively with reference to conclusion。Detector detects that data and result are omnidistance and shows in the digital display screen of digital display module 14, what detection data and result can pass through the operation interface selective of hydraulic cylinder interior leakage leakage detector 1 simultaneously is saved in data storage card 16, can be analyzed as required working with the post processing such as printing in computer。Additionally, power module 15 does not only have external power source interface, also there is jumbo battery to provide power supply to detector with each sensor simultaneously。
The total travel of hydraulic cylinder takes different stop positions, and detects the leakage rate situation of each position, it is possible to draw the internal leakage curve of each position of hydraulic cylinder total travel。
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, it is clear that the present invention can be carried out various change and modification without deviating from the spirit and scope of the present invention by those skilled in the art。So, if these amendments of the present invention and modification belong within the scope of the claims in the present invention and equivalent technologies thereof, then the present invention is also intended to comprise these change and modification。
Claims (8)
1. a high-precision hydraulic cylinder internal leakage detecting device, it is characterised in that: include hydraulic cylinder interior leakage leakage detector (1), pressure transducer A (6.1), pressure transducer B (6.2), displacement transducer (4) and hydraulic control circuit (8)；Institute's displacement sensors is connected between hydraulic cylinder interior leakage leakage detector and detected hydraulic cylinder, for detecting the position signalling of hydraulic cylinder；Described pressure transducer A is connected to detected hydraulic cylinder and hydraulic cylinder controls between loop, and for obtaining the pressure of hydraulic cylinder one end, described pressure transducer A leaks detector with hydraulic cylinder interior leakage and is connected；Described pressure transducer B is connected to detected hydraulic cylinder and hydraulic cylinder controls between loop, and for obtaining the pressure of the hydraulic cylinder other end, described pressure transducer B leaks detector with hydraulic cylinder interior leakage and is connected。
2. high-precision hydraulic cylinder internal leakage detecting device according to claim 1, it is characterised in that: described pressure transducer A and hydraulic cylinder control to be connected between loop cut-out isolating valve A (7.1)。
3. high-precision hydraulic cylinder internal leakage detecting device according to claim 1 and 2, it is characterised in that: described pressure transducer B and hydraulic cylinder control to be connected between loop cut-out isolating valve B (7.2)。
4. high-precision hydraulic cylinder internal leakage detecting device according to claim 1, it is characterized in that: described hydraulic cylinder interior leakage leakage detector includes signal processing chip (13), A/D signal conversion module (12), interface circuit (11), digital display module (14) and data storage card (16), described A/D signal conversion module, digital display module, data storage card are connected with signal processing chip respectively, and described interface circuit is connected with A/D signal conversion module；Described power module is that power unit is powered。
5. high-precision hydraulic cylinder internal leakage detecting device according to claim 1, it is characterised in that: institute's displacement sensors is external displacement transducer。
6. high-precision hydraulic cylinder internal leakage detecting device according to claim 5, it is characterised in that: described external displacement transducer includes touch sensor and noncontacting proximity sensor。
7. high-precision hydraulic cylinder internal leakage detecting device according to claim 6, it is characterised in that: described touch sensor includes draw wire encoder。
8. high-precision hydraulic cylinder internal leakage detecting device according to claim 6, it is characterised in that: described noncontacting proximity sensor includes laser displacement sensor。
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| CN201610260707.5A CN105697460A (en) | 2016-04-25 | 2016-04-25 | High-precision hydraulic cylinder inner-leakage detection device |
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| CN201610260707.5A CN105697460A (en) | 2016-04-25 | 2016-04-25 | High-precision hydraulic cylinder inner-leakage detection device |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106592676A (en) * | 2016-12-06 | 2017-04-26 | 泸州长江液压密封件有限公司 | Supporting leg hydraulic cylinder suitable for engineering machine |
| CN107725535A (en) * | 2017-11-20 | 2018-02-23 | 上海交通大学 | A kind of excavator hydraulic cylinder leakage detection method and device |
| CN108361242A (en) * | 2018-01-29 | 2018-08-03 | 中国第汽车股份有限公司 | Hydraulic cylinder sealing detection device |
| CN108361243A (en) * | 2018-02-27 | 2018-08-03 | 龙工(福建)液压有限公司 | A kind of hydraulic cylinder detection method |
| CN108386417A (en) * | 2018-02-08 | 2018-08-10 | 宁波德昂纳机械有限公司 | A kind of multistation testing stand and its detection method |
| WO2020007208A1 (en) * | 2018-07-02 | 2020-01-09 | 尹财富 | Hydraulic circulation system |
| CN111247347A (en) * | 2018-08-10 | 2020-06-05 | Ｋｙｂ株式会社 | Fluid leak detection system |
| CN112855651A (en) * | 2019-11-12 | 2021-05-28 | 上海朝田实业股份有限公司 | High-precision hydraulic cylinder |
| CN113358300A (en) * | 2021-05-27 | 2021-09-07 | 中冶赛迪工程技术股份有限公司 | Hydraulic system pipeline leakage state detection system |
| CN113969918A (en) * | 2021-10-25 | 2022-01-25 | 珠海格力智能装备有限公司 | Hydraulic cylinder test method and hydraulic cylinder test system |
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| CN101061320A (en) * | 2004-11-19 | 2007-10-24 | 费斯托合资公司 | Diagnosis device for at least one pneumatic valve actuator arrangement |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106592676A (en) * | 2016-12-06 | 2017-04-26 | 泸州长江液压密封件有限公司 | Supporting leg hydraulic cylinder suitable for engineering machine |
| CN107725535A (en) * | 2017-11-20 | 2018-02-23 | 上海交通大学 | A kind of excavator hydraulic cylinder leakage detection method and device |
| CN108361242A (en) * | 2018-01-29 | 2018-08-03 | 中国第汽车股份有限公司 | Hydraulic cylinder sealing detection device |
| CN108386417A (en) * | 2018-02-08 | 2018-08-10 | 宁波德昂纳机械有限公司 | A kind of multistation testing stand and its detection method |
| CN108386417B (en) * | 2018-02-08 | 2023-12-29 | 宁波德昂纳机械有限公司 | Multi-station test bed and detection method thereof |
| CN108361243A (en) * | 2018-02-27 | 2018-08-03 | 龙工(福建)液压有限公司 | A kind of hydraulic cylinder detection method |
| WO2020007208A1 (en) * | 2018-07-02 | 2020-01-09 | 尹财富 | Hydraulic circulation system |
| CN111247347A (en) * | 2018-08-10 | 2020-06-05 | Ｋｙｂ株式会社 | Fluid leak detection system |
| CN111247347B (en) * | 2018-08-10 | 2022-03-22 | Ｋｙｂ株式会社 | Fluid leak detection system |
| CN112855651A (en) * | 2019-11-12 | 2021-05-28 | 上海朝田实业股份有限公司 | High-precision hydraulic cylinder |
| CN113358300A (en) * | 2021-05-27 | 2021-09-07 | 中冶赛迪工程技术股份有限公司 | Hydraulic system pipeline leakage state detection system |
| CN113969918A (en) * | 2021-10-25 | 2022-01-25 | 珠海格力智能装备有限公司 | Hydraulic cylinder test method and hydraulic cylinder test system |
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Application publication date: 20160622 |