CN112324745B - Portable hydraulic system leakage signal acquisition device and acquisition method thereof - Google Patents
Portable hydraulic system leakage signal acquisition device and acquisition method thereof Download PDFInfo
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- CN112324745B CN112324745B CN201910907022.9A CN201910907022A CN112324745B CN 112324745 B CN112324745 B CN 112324745B CN 201910907022 A CN201910907022 A CN 201910907022A CN 112324745 B CN112324745 B CN 112324745B
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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
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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
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/08—Servomotor systems incorporating electrically operated control means
- F15B21/087—Control strategy, e.g. with block diagram
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Abstract
The invention relates to a leakage signal acquisition device and an acquisition method for a hydraulic system, in particular to a portable leakage signal acquisition device for the hydraulic system and an acquisition method thereof. The human-computer interaction interface is electrically connected with the controller; the oil outlet of the quantitative hydraulic pump is respectively in hydraulic connection with the oil inlets of the temperature sensor and the flow sensor I; the temperature sensor electrical signal output port is electrically connected with the controller; an electric signal output port of the flow sensor I is electrically connected with a controller; the collector power oiling quick male joint is respectively in hydraulic connection with an oil inlet of a pressure gauge, an oil inlet of a pollution detector and an oil inlet of an overflow valve; the oil outlet of the pollution detection meter is hydraulically connected with an oil tank; the electric signal output port of the pollution detector is electrically connected with the controller; stopping the collected hydraulic system; the quantitative hydraulic pump outputs constant flow hydraulic oil according to the set flow; the flow output is set arbitrarily according to the requirement, and once the hydraulic oil with constant flow output is set, the hydraulic oil does not change along with the change of the acquisition environment temperature and the acquisition pressure.
Description
Technical Field
The invention relates to a leakage signal acquisition device and an acquisition method of a hydraulic system, in particular to a portable leakage signal acquisition device and an acquisition method of the hydraulic system.
Background
The leakage of the hydraulic system not only causes the flow parameter change of the hydraulic system, but also causes the parameters such as pressure, oil temperature, speed and efficiency of the executive component to change, and the complex hydraulic system fault is generated. Leakage from a hydraulic system includes both external leakage and internal leakage. External leakage not only causes the loss of hydraulic oil, but also causes environmental pollution and fire hazard; the internal leakage not only causes the power loss of the hydraulic system, but also causes a series of hidden troubles such as overheating of the hydraulic system, slow action of a hydraulic actuator, pressure reduction, low efficiency and the like.
The leakage signals of the existing hydraulic systems at home and abroad mainly comprise the following methods:
the pressure signal is collected, and the leakage test of the hydraulic system is realized by combining the technologies of wavelet transformation, BP neural network, pressure integration, fuzzy neural network, differential pressure analysis and the like.
A leakage testing and positioning method is carried out based on a time sequence analysis method, modeling simulation and the like.
And acquiring a signal of the oil level of the oil tank, and analyzing the external leakage of the hydraulic system through the dynamic change of the signal.
These methods are all in theoretical research and experimental stages, and all achieve certain research results, but do not meet the requirements of actual engineering for a wide variety of hydraulic systems.
Disclosure of Invention
The invention aims to solve the technical problem of providing a portable hydraulic system leakage signal collector and a collection method thereof, the device can meet the collection of all hydraulic systems or hydraulic elements (except flow control valves) and leakage signals, and has the characteristics of easy connection, accurate data collection, low cost, wide application and the like.
In order to solve the technical problems, the invention adopts the following technical means:
a portable leakage signal acquisition device of a hydraulic system comprises a human-computer interaction interface, a controller, a motor driver, a direct-current brushless motor, a temperature sensor, a flow sensor, a proportional overflow valve, a pressure sensor, an electromagnetic directional valve, a quick connector and a pollution detector, wherein the human-computer interaction interface is electrically connected with the controller; the controller is electrically connected with the motor driver; the motor driver is electrically connected with the direct current brushless motor; the direct current brushless motor rotating shaft is mechanically connected with the quantitative hydraulic pump rotating shaft; the oil inlet of the quantitative hydraulic pump is hydraulically connected with the oil tank; the oil outlet of the quantitative hydraulic pump is respectively in hydraulic connection with the oil inlets of the temperature sensor and the flow sensor I; the temperature sensor electrical signal output port is electrically connected with the controller; an electric signal output port of the flow sensor I is electrically connected with a controller; the outlet of the flow sensor I is respectively connected with a pressure sensor, the inlet of the electromagnetic directional valve and the inlet of the proportional overflow valve in a hydraulic mode; the electromagnetic directional valve is hydraulically connected with the quick male joint of the collector; the quick male joint of the collector is hydraulically connected with the quick female joint; the quick female joint of the collector is hydraulically connected with the oil delivery hose; the oil delivery hose is hydraulically connected with a main pressure measuring point of the collected system; the outlet of the proportional overflow valve is hydraulically connected with the inlet of the flow sensor II; the outlet of the flow sensor II is hydraulically connected with an oil tank; the electric signal output port of the proportional overflow valve is electrically connected with the controller; an electric signal output port of the flow sensor II is electrically connected with the controller; the collector power oiling quick male joint is respectively in hydraulic connection with an oil inlet of a pressure gauge, an oil inlet of a pollution detector and an oil inlet of an overflow valve; the oil outlet of the pollution detection meter is hydraulically connected with an oil tank; the electric signal output port of the pollution detector is electrically connected with the controller; the oil outlet of the overflow valve is hydraulically connected with an oil tank.
Compared with the prior art, the method has the prominent characteristics that:
(1) the output flow of the scheme can be set arbitrarily according to requirements, and once the setting is finished, the scheme outputs the hydraulic oil with constant flow and does not change along with the change of the acquisition environment temperature and the acquisition pressure. The pressure measuring point of the collected hydraulic system is a leakage signal collecting input point, the hydraulic pump of the collected hydraulic system stops working, online leakage signals of the collected hydraulic system and the hydraulic element are collected, online signal collection of almost all hydraulic elements except the flow control valve can be met, and the device has the advantages of being easy to connect, accurate in test, low in cost, widely applicable and the like.
(2) The leakage information of the collected hydraulic system branch and the hydraulic component is sorted from large to small, and the spare parts are scientifically prepared according to the sorting result, so that data are provided for the maintenance of the equipment.
(3) The method is used for collecting leakage data of the hydraulic element before leaving factory, perfecting the leakage data of the hydraulic element before leaving factory and providing data for fault diagnosis of the hydraulic element.
The method comprises the steps of calibrating the pressure according to the factory leakage detection pressure of the hydraulic element, acquiring leakage signal data of the hydraulic element under the pressure, and compiling a product sample, so that accurate data support is provided for leakage performance detection of the hydraulic element in use, and data support is provided for maintenance and repair of the hydraulic element.
The acquisition method of the portable hydraulic system leakage signal acquisition device comprises the following steps:
1) by applying an oil delivery hose, the signal acquisition quick connector is connected with a pressure measurement point of an acquired hydraulic system or a pressure process hole of a hydraulic manifold block connected with an oil outlet of a hydraulic pump of the acquired hydraulic system;
2) the collected hydraulic system stops working, hydraulic oil is provided by the scheme, and leakage signals of all branches and leakage signal data of all hydraulic elements are collected by combining a process flow control program of the collected hydraulic system;
3) the constant-displacement hydraulic pump outputs constant-flow hydraulic oil according to the set flow
The flow of the scheme is set by a human-computer interaction interface, an electric signal of the flow is transmitted to a controller, the controller transmits the signal to a motor driver through operation, the motor driver drives a direct-current brushless motor to drive hydraulic oil output by a quantitative hydraulic pump, the flow signal is converted into an electric signal through a flow sensor I and is transmitted to the controller, and the controller realizes difference output of the two electric signals to the direct-current brushless motor, so that the flow of the oil output by the quantitative hydraulic pump is constant;
4) the set pressure of the proportional relief valve is set according to the percentage of the actual pressure of the hydraulic system of the acquired signal, and can also be set according to the pressure of a factory leakage test of a hydraulic element;
5) A flow sensor II acquires an oil return flow signal of the proportional overflow valve; the difference between the flow signals of the flow sensor I and the flow sensor II is a leakage signal of the collected hydraulic system or hydraulic element;
6) collected data of oil pollution state of hydraulic system and power oiling of oil tank of device
The power of the device refuels quick-operation joint through the oil hose with by gathering hydraulic system pressure measurement point hydraulic connection, by gathering hydraulic system's hydraulic pump start, fluid gets into the pollution detection meter all the way through collector power refuels quick-operation joint, accomplishes the collection by gathering hydraulic system's pollution state data, another way accomplishes refuelling of this case oil tank through the overflow valve.
7) The quick female joint and the oil delivery hose are connected with the quick male joint of the collector when signals are collected; when the power is used for oiling, the power oiling quick male joint is connected with the collector power oiling quick male joint, and the position of the other end of the oil delivery hose is unchanged.
Drawings
Fig. 1 is a schematic structural view of the present invention.
FIG. 2 is a schematic diagram of a leak signal acquisition connection for a hydraulic system under test according to the present invention.
Description of reference numerals: 1-a motor driver; 2-a dc brushless motor; 3-a quantitative hydraulic pump; 4-a temperature sensor; 5-a flow sensor I; 6-a pressure sensor; 7-an electromagnetic directional valve; 8-collector quick male joint; 9-a pressure gauge; 10-proportional relief valve; 11-flow sensor II; 12-collector power refueling quick male joint; 13-relief valve; 14-a contamination detector; 15-oil tank; 16-oil hose; 17-a quick female joint; 18-human-computer interaction interface; 19-a controller; 20-main pressure measuring points of the acquired system; aa-electrical signal connection; bb-electrical signal connection; cc-electrical signal connection; d-controller 19 electrical signal backup port; e-controller 19 electrical signal backup port.
Detailed Description
The present invention will be further described with reference to the following examples.
Referring to fig. 1, a portable hydraulic system leakage signal collector is composed of main elements such as a motor driver 1, a direct current brushless motor 2, a quantitative hydraulic pump 3, a temperature sensor 4, a flow sensor I5, a pressure sensor 6, an electromagnetic directional valve 7, a collector quick male connector 8, a pressure gauge 9, a proportional overflow valve 10, a flow sensor II 11, a collector power refueling quick male connector 12, an overflow valve 13, a pollution detector 14, an oil tank 15, an oil delivery hose 16, a quick female connector 17, a human-computer interaction interface 18, a controller 19 and the like; the motor driver 1 is electrically connected with the direct current brushless motor; the rotating shaft of the direct current brushless motor 2 is mechanically connected with the rotating shaft of the quantitative hydraulic pump 3, and the direct current brushless motor 2 is electrically connected with the controller 19; an oil inlet of the quantitative hydraulic pump 3 is hydraulically connected with an oil tank 15; an oil outlet of the quantitative hydraulic pump 3 is respectively in hydraulic connection with oil inlets of the temperature sensor 4 and the flow sensor I5; the temperature sensor 4 is electrically connected with the controller 19; the flow sensor I5 is electrically connected with the controller 19; the outlet of the flow sensor (1)5 is respectively connected with a pressure sensor 6, an electromagnetic directional valve 7 and a proportional overflow valve 10 in a hydraulic mode; the electromagnetic directional valve 7 is hydraulically connected with the collector quick male joint 8; the collector quick male joint 8 is hydraulically connected with the female joint 17; the collector quick female joint 17 is hydraulically connected with an oil delivery hose 16; the oil delivery hose 16 is hydraulically connected with a main pressure measuring point 20 of the collected system (see fig. 2); the proportional overflow valve 10 is hydraulically connected with an inlet of a flow sensor II 11; an outlet of the flow sensor II 11 is hydraulically connected with an oil tank 15; the proportional overflow valve 10 is electrically connected with the controller 19; the flow sensor II 11 is electrically connected with the controller 19; the collector power oiling quick male joint 12 is respectively hydraulically connected with an oil inlet of a pressure gauge 9, an oil inlet of a pollution detector 14 and an oil inlet of an overflow valve 13; the oil outlet of the pollution detector 14 is hydraulically connected with an oil tank 15; the contamination detector 14 is electrically connected to the controller 19; the oil outlet of the overflow valve 13 is hydraulically connected with an oil tank 15.
The acquisition method of the leakage signal acquisition device of the portable hydraulic system comprises the following steps:
(1) by using the oil delivery hose 16, the signal acquisition quick connector (the combination of the acquisition quick male connector 8 and the quick female connector 17) of the signal acquisition device is connected with the pressure measurement point 20 of the acquired hydraulic system or the pressure process hole of the hydraulic manifold block connected with the oil outlet of the hydraulic pump of the acquired hydraulic system.
(2) The collected hydraulic system stops working, the signal collecting device provides hydraulic oil, and the collection of leakage signals of all branches and leakage signals of all hydraulic elements is completed by combining a process flow control program of the collected hydraulic system.
(3) The constant-displacement hydraulic pump outputs constant-flow hydraulic oil according to the set flow
The flow of the device is set by the man-machine interaction interface 18, an electric signal of the flow is transmitted to the controller 19, the controller 19 carries the signal to the motor driver 1 through operation, the motor driver 1 drives the direct current brushless motor 2 to drive the hydraulic oil output by the quantitative hydraulic pump 3, the flow signal is converted into the electric signal through the flow sensor I5 to be transmitted to the controller 19, the controller 19 realizes that two electric signals are output to the direct current brushless motor 2, and therefore the constancy of the oil flow output by the quantitative hydraulic pump 3 is realized.
(4) The set pressure of the proportional relief valve 10 is set according to the percentage of the actual pressure of the hydraulic system of the collected signal, or may be set according to the pressure of the factory leakage test of the hydraulic component.
(5) A flow sensor II 11 acquires an oil return flow signal of the proportional overflow valve 10; and the difference between the flow signals of the flow sensor I and the flow sensor II is a leakage signal of the collected hydraulic system.
(6) Acquired data acquisition of oil pollution state of hydraulic system and dynamic refueling of oil tank
The power refueling quick connector (the collector power refueling quick male connector 12 and the quick female connector 17 are combined) is hydraulically connected with a pressure measuring point 20 of a collected hydraulic system through an oil delivery hose 16, the hydraulic pump of the collected hydraulic system is started, oil enters a pollution detector 14 through the collector power refueling quick connector, the collection of pollution state data of the collected hydraulic system is completed, and the refueling of an oil tank 15 of the scheme is completed through an overflow valve 13 on the other path.
The embodiment outputs quantitative oil, the pressure measuring point of the collected hydraulic system is a leakage signal collecting input point, the hydraulic pump of the collected hydraulic system stops working, the collected hydraulic system and the hydraulic element are subjected to leakage signal collection, the online leakage signal collection of almost all hydraulic elements except a flow control valve can be met, the leakage performance of the collected hydraulic system branch and the leakage performance of the hydraulic elements are rapidly sequenced, and a technical means is provided for scientific spare parts; the method has the characteristics of easy connection, accurate test, low cost, wide application and the like; the method is set according to the percentage of the actual pressure of the collected hydraulic system, and can also be set according to the pressure of a factory leakage test of the hydraulic element, and the change of parameters such as a leakage signal is collected; the remarkable effects are as follows: the method has the advantages that the collection of the hydraulic system parameters of the hydraulic equipment which leaves the factory newly is realized and used as the original data, so that accurate data support is provided for the maintenance of the leakage fault of the hydraulic equipment in use; the leakage data acquisition before the delivery of the hydraulic element is realized, and a basis is provided for repairing the hydraulic element.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, which is defined by the appended claims and their equivalents.
Claims (1)
1. A signal acquisition method of a portable hydraulic system leakage signal acquisition device comprises a human-computer interaction interface, a controller, a motor driver, a direct current brushless motor, a temperature sensor, a flow sensor, a proportional overflow valve, a pressure sensor, an electromagnetic directional valve, a quick connector and a pollution detector, and is characterized in that: the human-computer interaction interface is electrically connected with the controller; the controller is electrically connected with the motor driver; the motor driver is electrically connected with the direct current brushless motor; the direct current brushless motor rotating shaft is mechanically connected with the quantitative hydraulic pump rotating shaft; the oil inlet of the quantitative hydraulic pump is hydraulically connected with the oil tank; the oil outlet of the quantitative hydraulic pump is respectively in hydraulic connection with the oil inlets of the temperature sensor and the flow sensor I; the temperature sensor electrical signal output port is electrically connected with the controller; an electric signal output port of the flow sensor I is electrically connected with a controller; the outlet of the flow sensor I is respectively connected with a pressure sensor, the inlet of the electromagnetic directional valve and the inlet of the proportional overflow valve in a hydraulic mode; the electromagnetic directional valve is hydraulically connected with the quick male joint of the collector; the quick male joint of the collector is hydraulically connected with the quick female joint; the quick female joint of the collector is hydraulically connected with the oil delivery hose; the oil delivery hose is hydraulically connected with a main pressure measuring point of the collected system; the outlet of the proportional overflow valve is hydraulically connected with the inlet of the flow sensor II; the outlet of the flow sensor II is hydraulically connected with an oil tank; the electric signal output port of the proportional overflow valve is electrically connected with the controller; an electric signal output port of the flow sensor II is electrically connected with the controller; the collector power oiling quick male joint is respectively in hydraulic connection with an oil inlet of a pressure gauge, an oil inlet of a pollution detector and an oil inlet of an overflow valve; the oil outlet of the pollution detection meter is hydraulically connected with an oil tank; the electric signal output port of the pollution detector is electrically connected with the controller; the oil outlet of the overflow valve is hydraulically connected with an oil tank;
The signal acquisition method is characterized by comprising the following steps:
1) an oil delivery hose is used, and a signal acquisition quick connector of a signal acquisition device is connected with a pressure measurement point of an acquired hydraulic system or a pressure process hole of a hydraulic manifold block connected with an oil outlet of a hydraulic pump of the acquired hydraulic system;
2) the collected hydraulic system stops working, the signal collecting device provides hydraulic oil, and leakage signals of all branches and leakage signal data collection of all hydraulic elements are completed by combining a process flow control program of the collected hydraulic system;
3) the constant-displacement hydraulic pump outputs constant-flow hydraulic oil according to the set flow
The flow of the signal acquisition device is set by the human-computer interaction interface, an electric signal of the flow is transmitted to the controller, the controller transmits the signal to the motor driver through operation, the motor driver drives the direct-current brushless motor to drive the hydraulic oil output by the quantitative hydraulic pump, the flow signal is converted into an electric signal through the flow sensor I and is transmitted to the controller, and the controller realizes the difference of the two electric signals and outputs the electric signal to the direct-current brushless motor, so that the flow of the oil output by the quantitative hydraulic pump is constant;
4) The set pressure of the proportional relief valve is set according to the percentage of the actual pressure of the hydraulic system of the acquired signal or the pressure of a factory leakage test of the hydraulic element;
5) the flow sensor II acquires an oil return flow signal of the proportional overflow valve; the difference between the flow signals of the flow sensor I and the flow sensor II is a leakage signal of the collected hydraulic system or hydraulic element;
6) collected oil pollution state data of hydraulic system and oil tank power refueling
The power refueling quick connector of the signal acquisition device is hydraulically connected with a pressure measuring point of an acquired hydraulic system through an oil delivery hose, a hydraulic pump of the acquired hydraulic system is started, one path of oil enters a pollution detector through the power refueling quick connector of the acquisition device to finish the acquisition of pollution state data of the acquired hydraulic system, and the other path of oil finishes the refueling of an oil tank through an overflow valve;
7) the quick female joint and the oil delivery hose are connected with the quick male joint of the collector when signals are collected; when the power is used for oiling, the power oiling quick male joint is connected with the collector power oiling quick male joint, and the position of the other end of the oil delivery hose is unchanged.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910907022.9A CN112324745B (en) | 2019-09-24 | 2019-09-24 | Portable hydraulic system leakage signal acquisition device and acquisition method thereof |
| PCT/CN2019/000201 WO2021056126A1 (en) | 2019-09-24 | 2019-10-25 | Portable hydraulic system leakage signal acquisition apparatus and acquisition method thereof |
| ZA2022/04377A ZA202204377B (en) | 2019-09-24 | 2022-04-19 | Portable hydraulic system leakage signal acquisition apparatus and acquisition method thereof |
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| CN201910907022.9A CN112324745B (en) | 2019-09-24 | 2019-09-24 | Portable hydraulic system leakage signal acquisition device and acquisition method thereof |
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| CN112324745B true CN112324745B (en) | 2022-06-10 |
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| WO (1) | WO2021056126A1 (en) |
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| CN113916430B (en) * | 2021-10-11 | 2024-08-02 | 芜湖哈特机器人产业技术研究院有限公司 | Hydraulic jack pressure detection device and hydraulic jack pressure detection method |
| CN114087259B (en) * | 2021-11-10 | 2024-04-12 | 中国航发沈阳黎明航空发动机有限责任公司 | Hydraulic test device and test method for checking and adjusting jet pipe of aero-engine |
| CN114109961B (en) * | 2021-11-12 | 2023-04-25 | 恒天九五重工有限公司 | Calibration method for motor variable starting point of power head of rotary drilling rig |
| CN114215826A (en) * | 2021-12-13 | 2022-03-22 | 中国铁道科学研究院集团有限公司 | Hydraulic system for oil maintenance and oil comprehensive maintenance device |
| CN115450990B (en) * | 2022-11-14 | 2023-02-03 | 山东天力润滑油有限公司 | Method and apparatus for detecting hydraulic oil leakage |
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| Publication number | Publication date |
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| ZA202204377B (en) | 2022-06-29 |
| CN112324745A (en) | 2021-02-05 |
| WO2021056126A1 (en) | 2021-04-01 |
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