CN114017421A - System and method for monitoring oil leakage of speed regulator hydraulic system - Google Patents
System and method for monitoring oil leakage of speed regulator hydraulic system Download PDFInfo
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- CN114017421A CN114017421A CN202111371539.4A CN202111371539A CN114017421A CN 114017421 A CN114017421 A CN 114017421A CN 202111371539 A CN202111371539 A CN 202111371539A CN 114017421 A CN114017421 A CN 114017421A
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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
- F15B20/00—Safety arrangements for fluid actuator systems; Applications of safety devices in fluid actuator systems; Emergency measures for fluid actuator systems
- F15B20/005—Leakage; Spillage; Hose burst
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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
- F15B2211/86—Control during or prevention of abnormal conditions
- F15B2211/863—Control during or prevention of abnormal conditions the abnormal condition being a hydraulic or pneumatic failure
-
- 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
- F15B2211/86—Control during or prevention of abnormal conditions
- F15B2211/863—Control during or prevention of abnormal conditions the abnormal condition being a hydraulic or pneumatic failure
- F15B2211/8636—Circuit failure, e.g. valve or hose failure
-
- 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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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Examining Or Testing Airtightness (AREA)
Abstract
A speed regulator hydraulic system oil leakage monitoring system and method, the system includes pressing the oil tank, returning oil tank, pressing the oil tank level gauge, returning oil tank level gauge, PLC controller, man-machine interaction device, monitoring system; the pressure oil tank is used for providing a pressure oil source for the hydraulic system; the oil return tank is used for collecting non-pressure return oil of the hydraulic system. The pressure oil tank is internally provided with a pressure oil tank liquid level meter for measuring the liquid level of pressure oil in the pressure oil tank; an oil return tank liquid level meter is arranged in the oil return tank and used for measuring the liquid level of non-pressure oil in the oil return tank. The oil tank pressure liquid level meter and the oil return tank liquid level meter are connected with a PLC (programmable logic controller), and the PLC is respectively connected with a human-computer interaction device and a monitoring system. The invention can detect the oil leakage of the hydraulic system in real time and monitor the operation condition of the hydraulic system of the speed regulator; when the oil leakage problem of the hydraulic system occurs, the oil leakage alarm can diagnose and alarm in time, and operation and maintenance personnel can be reminded to deal with the oil leakage problem in time.
Description
Technical Field
The invention relates to the technical field of monitoring of a speed regulator hydraulic system, in particular to a system and a method for monitoring oil leakage of the speed regulator hydraulic system.
Background
The speed regulator of the hydroelectric generating set regulates the load and the rotating speed of the hydroelectric generating set by controlling the opening degree of the guide vane, and the hydraulic system of the speed regulator is required for providing power for operating the guide vane. Therefore, whether the speed regulator hydraulic system can safely and stably operate plays an important role in the power generation control process of the water turbine generator set. When the hydraulic system of the speed regulator operates, if oil leakage occurs, the safe and stable operation of the water-turbine generator set can be seriously threatened. At present, a perfect speed regulator hydraulic system oil leakage amount calculation method and a perfect speed regulator hydraulic system oil leakage amount monitoring system do not exist, when a hydraulic system of a hydraulic turbine speed regulator operates, oil leakage amount of the hydraulic system is detected in real time, and operation conditions of the hydraulic system of the speed regulator are monitored.
Disclosure of Invention
In order to diagnose and find the oil leakage problem of the hydraulic system of the speed governor in time, the invention provides a system and a method for monitoring the oil leakage of the hydraulic system of the speed governor, which can detect the oil leakage of the hydraulic system in real time and monitor the operation condition of the hydraulic system of the speed governor when the hydraulic system of the hydraulic turbine runs; when the oil leakage problem of the hydraulic system occurs, the oil leakage alarm can diagnose and alarm in time, and operation and maintenance personnel can be reminded to deal with the oil leakage problem in time.
The technical scheme adopted by the invention is as follows:
a speed regulator hydraulic system oil leakage monitoring system, the system includes:
the system comprises an oil pressing tank, an oil return tank, an oil pressing tank liquid level meter, an oil return tank liquid level meter, a PLC (programmable logic controller), a human-computer interaction device and a monitoring system;
the oil pressing tank is used for providing a pressure oil source for the hydraulic system;
the oil return tank is used for collecting non-pressure return oil of the hydraulic system;
the pressure oil tank is internally provided with a pressure oil tank liquid level meter for measuring the liquid level of pressure oil in the pressure oil tank;
an oil return tank liquid level meter is arranged in the oil return tank and used for measuring the liquid level of non-pressure oil in the oil return tank;
the oil tank pressure liquid level meter and the oil return tank liquid level meter are connected with a PLC (programmable logic controller), and the PLC is respectively connected with a human-computer interaction device and a monitoring system.
The PLC collects liquid level signals of the oil tank and the oil return tank measured by the oil tank level meter and the oil return tank level meter and state information of the hydraulic system, and outputs oil leakage amount of the hydraulic system and oil leakage fault alarm information of the hydraulic system to the human-computer interaction device and the monitoring system through data processing and calculation.
The status information of the hydraulic system includes whether the hydraulic system isolation valve is closed. If the isolation valve is in a closed state, the hydraulic system of the speed regulator is in a shutdown state; if the isolating valve is in the open state, the speed regulatorThe hydraulic system is in operation. The man-machine interaction device displays the oil leakage amount of the hydraulic system and the oil leakage fault alarm information of the hydraulic system output by the PLC in real time, and the oil leakage amount criterion threshold value V of the oil leakage amount of the hydraulic system of the speed regulator set by a userThreshold valueAnd transmitting the data to the PLC in a communication mode.
A method for monitoring the oil leakage of a speed regulator hydraulic system comprises the following steps:
step 1): initializing, the PLC acquires a liquid level signal h1 of a pressure oil tank and a liquid level signal h2 of an oil return tank in real time, state information of a hydraulic system and a criterion threshold value V of oil leakage and oil leakage of a speed regulator hydraulic system output by a man-machine interaction device and set by a userThreshold value。
Step 2): when the speed regulator hydraulic system is in a shutdown state, the PLC calculates the initial value V of the oil volume of the speed regulator hydraulic systemInitial；
VInitial＝h1o*S1+h2o*S2；
Wherein: h1 when the governor hydraulic system is in the off stateoFor initial filling level of tank, h2oIs the initial liquid level of the return tank. S1 is the cross sectional area of the governor hydraulic system oil pressure tank, S2 is the cross sectional area of the governor hydraulic system oil return tank.
Step 3): when the hydraulic system of the speed regulator is in an operating state, the PLC calculates the volume value V of the oil of the hydraulic system of the speed regulator in real time;
V＝V1n+V2n＝h1n*S1+h2n*S2
wherein: when the governor hydraulic system is in operation, V1nVolume of oil in pressure oil tank of governor hydraulic system, V2nH1 volume of oil in governor hydraulic system return tanknFor pressing the real-time level of the tank 1, h2nAnd S1 is the real-time liquid level of the oil return tank, the cross sectional area of a pressure oil tank of the hydraulic system of the speed regulator is S8932, and the cross sectional area of the oil return tank of the hydraulic system of the speed regulator is S2.
Step 4): PLC controller calculates real-time oil leakage V of speed regulator hydraulic systemLeakage net＝|V-VInitial|。
Step 5): when V isLeakage net>VThreshold valueAnd meanwhile, the oil leakage of the speed regulator hydraulic system is alarmed.
Step 6): PLC controller output speed regulator hydraulic system oil leakage VLeakage netAnd oil leakage alarm information of the hydraulic system. The invention discloses a system and a method for monitoring the oil leakage of a speed regulator hydraulic system, which have the following technical effects:
1) by adopting the method for monitoring the oil leakage of the hydraulic system of the speed regulator, the oil leakage of the hydraulic system of the speed regulator can be accurately calculated in real time.
2) The speed regulator hydraulic system oil leakage monitoring system can monitor the operating condition of the speed regulator hydraulic system in real time, diagnose and alarm in time when the oil leakage problem of the hydraulic system occurs, and remind operation maintenance personnel to process in time.
Drawings
Fig. 1 is a schematic structural diagram of a governor hydraulic system oil leakage monitoring system of the present invention.
In fig. 1: 1-oil tank pressing 1, 2-oil return tank, 3-oil tank pressing liquid level meter, 4-oil return tank liquid level meter, 5-secondary electric loop, 6-PLC controller, 7-man-machine interaction device and 8-monitoring system.
Fig. 2 is a flow chart of a method for monitoring the oil leakage of a hydraulic system of a speed regulator.
Detailed Description
A system for monitoring oil leakage of a hydraulic system of a speed regulator is shown in figure 1 and comprises:
the system comprises an oil pressing tank 1, an oil return tank 2, an oil pressing tank liquid level meter 3, an oil return tank liquid level meter 4, a PLC (programmable logic controller) 6, a human-computer interaction device 7 and a monitoring system 8;
the pressure oil tank 1 is a container for storing pressure oil in a hydraulic system of the speed regulator and is used for providing a pressure oil source for the hydraulic system;
the oil return tank 2 is a container for storing non-pressure oil in a speed regulator hydraulic system and is used for collecting non-pressure return oil of the hydraulic system;
the pressure oil tank 1 is internally provided with a pressure oil tank liquid level meter 3 for measuring the liquid level of the pressure oil in the pressure oil tank 1;
an oil return tank liquid level meter 4 is arranged in the oil return tank 2 and used for measuring the liquid level of non-pressure oil in the oil return tank 2;
and the secondary electric loop 5 transmits liquid level signals measured by the pressure oil tank liquid level meter 3 and the pressure oil tank liquid level meter 4 to a PLC (programmable logic controller) 6 of the speed regulator control cabinet.
The oil tank pressure liquid level meter 3 and the oil return tank liquid level meter 4 are connected with a PLC (programmable logic controller) 6, and the PLC 6 is respectively connected with a human-computer interaction device 7 and a monitoring system 8.
The PLC 6 collects liquid level signals of the oil tank 1 and the oil return tank 2 measured by the oil tank pressure level meter 3 and the oil return tank level meter 4 and state information of the hydraulic system, and outputs oil leakage amount of the hydraulic system and oil leakage fault alarm information of the hydraulic system to the human-computer interaction device 7 and the monitoring system 8 through data processing and calculation.
The status information of the hydraulic system includes whether the hydraulic system isolation valve is closed. If the isolation valve is in a closed state, the hydraulic system of the speed regulator is in a shutdown state; and if the isolation valve is in an open state, the hydraulic system of the speed regulator is in a running state. The man-machine interaction device 7 displays the oil leakage amount of the hydraulic system and the oil leakage fault alarm information of the hydraulic system output by the PLC 6 in real time, and determines the oil leakage amount criterion threshold V of the oil leakage amount of the hydraulic system of the speed regulator set by a userThreshold valueAnd the data is transmitted to the PLC controller 6 in a communication mode.
The pressure oil tank liquid level meter 3 adopts a liquid level sensor with the brand of KSR KEUBLER and the model of MG-AU-VK10-TS-L2350/M2200 (K).
The oil return tank liquid level meter 4 adopts a liquid level sensor with the brand of KSR KEUBLER and the model of MG-AU-VK10-TS-L1550/M1400 (K).
The secondary electric loop 5 adopts a universal national standard cable.
The PLC controller 6 adopts a PLC controller with the brand name of Schneider and the model number of 140CPU 67160.
The man-machine interaction device 7 adopts a touch screen with the brand name of Schneider and the model number of XBTGT 7340.
The monitoring system 8 is a monitoring system which is manufactured by a reclaimed water science and technology manufacturer and has the model of H9000.
The hydropower station main monitoring system is divided into a plant station layer and a local control unit layer on the whole level. The site control unit layer is connected with the power station control network, and the site monitoring task of the specified equipment is completed by adopting a field bus technology. The monitoring system is characterized in that the site control unit layer is distributed according to controlled object units and consists of site control units (LCU) of the whole plant, and the site control units comprise LCU of each unit, LCU of service power, public LCU, LCU of switch station and LCU of dam crest. Each Local Control Unit (LCU) includes a PLC, a touch screen, network equipment, a cabinet, etc., and is responsible for data acquisition and processing of equipment (including governor hydraulic system equipment), equipment status monitoring and process monitoring, equipment control and regulation, and equipment information communication.
A method for monitoring the oil leakage of a hydraulic system of a speed regulator is shown in figure 2 and comprises the following steps:
step 1): initializing, the PLC 6 collects a liquid level signal h1 of the pressure oil tank 1 and a liquid level signal h2 of the oil return tank 2 in real time, state information of a hydraulic system and a criterion threshold value V of oil leakage and oil leakage of the hydraulic system of the speed regulator output by the man-machine interaction device 7 and set by a userThreshold value。
The status information of the hydraulic system includes whether the hydraulic system isolation valve is closed. If the isolation valve is in a closed state, the hydraulic system of the speed regulator is in a shutdown state; and if the isolation valve is in an open state, the hydraulic system of the speed regulator is in a running state.
Step 2): when the speed regulator hydraulic system is in the off state, the PLC 6 calculates the initial value V of the oil volume of the speed regulator hydraulic systemInitial，VInitial＝h1o*S1+h2o*S2；
Wherein: h1 when the governor hydraulic system is in the off stateoInitial level of pressure tank 1 for governor hydraulic system, h2oThe initial liquid level of the return oil tank 2 of the hydraulic system of the speed regulator.
S1 is the cross sectional area of the governor hydraulic system oil pressure tank 1, and S2 is the cross sectional area of the governor hydraulic system oil return tank 2.
Step 3): when the governor hydraulic system is in operationIn the state, the PLC 6 calculates the oil volume value V of the hydraulic system of the speed regulator in real time, and the V is h1n*S1+h2n*S2；
V＝V1n+V2n＝h1n*S1+h2n*S2
Wherein: when the governor hydraulic system is in operation, V1nVolume of oil in the tank 1 for governor hydraulics V2nH1 for the volume of oil in the governor hydraulic system return tank 2nFor pressing the real-time level of the tank 1, h2nAnd S1 is the real-time liquid level of the oil return tank 2, the cross sectional area of the pressure oil tank 1 of the hydraulic system of the speed governor is S2 is the cross sectional area of the oil return tank 2 of the hydraulic system of the speed governor.
Step 4): PLC 6 calculates real-time oil leakage V of speed regulator hydraulic systemLeakage net＝|V-VInitial|。
Step 5): when V isLeakage net>VThreshold valueAnd meanwhile, the oil leakage of the speed regulator hydraulic system is alarmed.
Step 6): PLC 6 output speed regulator hydraulic system oil leakage VLeakage netAnd oil leakage alarm information of the hydraulic system.
Claims (4)
1. A speed regulator hydraulic system oil leakage monitoring system is characterized in that the system comprises:
the system comprises an oil pressing tank (1), an oil return tank (2), an oil pressing tank liquid level meter (3), an oil return tank liquid level meter (4), a PLC (programmable logic controller) controller (6), a man-machine interaction device (7) and a monitoring system (8);
the oil pressing tank (1) is used for providing a pressure oil source for the hydraulic system;
the oil return tank (2) is used for collecting non-pressure return oil of the hydraulic system;
the pressure oil tank (1) is internally provided with a pressure oil tank liquid level meter (3) for measuring the liquid level of the pressure oil in the pressure oil tank (1);
an oil return tank liquid level meter (4) is arranged in the oil return tank (2) and is used for measuring the liquid level of non-pressure oil in the oil return tank (2);
the oil tank pressure liquid level meter (3) and the oil return tank liquid level meter (4) are connected with a PLC (programmable logic controller) (6), and the PLC (6) is respectively connected with a human-computer interaction device (7) and a monitoring system (8).
2. The governor hydraulic system oil leakage monitoring system of claim 1, wherein: the PLC (6) collects liquid level signals of the pressure oil tank (1) and the oil return tank (2) measured by the pressure oil tank liquid level meter (3) and the oil return tank liquid level meter (4) and state information of the hydraulic system, and outputs oil leakage amount of the hydraulic system and oil leakage fault alarm information of the hydraulic system to the human-computer interaction device (7) and the monitoring system (8) through data processing and calculation.
3. A governor hydraulic system oil leakage monitoring system according to claim 1 or 2, characterized in that: the man-machine interaction device (7) displays the oil leakage amount of the hydraulic system and the oil leakage fault alarm information of the hydraulic system output by the PLC (6) in real time, and the oil leakage amount criterion threshold value V of the oil leakage amount of the hydraulic system of the speed regulator set by a userThreshold valueAnd the data is transmitted to a PLC (6) in a communication mode.
4. A method for monitoring the oil leakage of a speed regulator hydraulic system is characterized by comprising the following steps:
step 1): initializing, collecting a liquid level signal h1 of a pressure oil tank (1) and a liquid level signal h2 of an oil return tank (2) in real time, state information of a hydraulic system and a speed regulator hydraulic system oil leakage and oil leakage criterion threshold value V output by a man-machine interaction device (7) and set by a userThreshold value；
Step 2): when the speed regulator hydraulic system is in a shutdown state, calculating an initial value V of the oil volume of the speed regulator hydraulic systemInitial，VInitial＝h1o*S1+h2o*S2；
Wherein: h1 when the governor hydraulic system is in the off stateoInitial level of pressure tank (1) for governor hydraulic system, h2oThe initial liquid level of an oil return tank (2) of a hydraulic system of the speed regulator; s1 is the cross sectional area of the oil pressure tank (1) of the speed governor hydraulic system, and S2 is the cross sectional area of the oil return tank (2) of the speed governor hydraulic system;
step 3): when the governor hydraulic system is in operationIn the running state, the oil volume value V of the hydraulic system of the speed regulator is calculated in real time, and V is V1n+V2n＝h1n*S1+h2n*S2；
Wherein: when the governor hydraulic system is in operation, V1nVolume of oil in the tank (1) for governor hydraulics V2nH1 is the volume of oil in the oil return tank (2) of the hydraulic system of the speed regulatornFor pressing the real-time level of the tank (1), h2nThe real-time liquid level of the oil return tank (2) is shown in S1, the cross sectional area of a pressure oil tank (1) of a hydraulic system of the speed regulator is shown in S2, and the cross sectional area of the oil return tank (2) of the hydraulic system of the speed regulator is shown in S2;
step 4): real-time oil leakage V of hydraulic system of calculating speed regulatorLeakage net＝|V-VInitial|；
Step 5): when V isLeakage net>VThreshold valueWhen the oil leakage of the speed regulator hydraulic system is detected, the oil leakage alarm is given out;
step 6): oil leakage V of hydraulic system of output speed regulatorLeakage netAnd oil leakage alarm information of the hydraulic system.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111371539.4A CN114017421A (en) | 2021-11-18 | 2021-11-18 | System and method for monitoring oil leakage of speed regulator hydraulic system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111371539.4A CN114017421A (en) | 2021-11-18 | 2021-11-18 | System and method for monitoring oil leakage of speed regulator hydraulic system |
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Citations (10)
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| CN110300857A (en) * | 2017-02-24 | 2019-10-01 | 西门子歌美飒可再生能源公司 | Method and arrangement for detecting oil leakage between sections of a hydraulic cylinder |
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| 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 |
| CN214404144U (en) * | 2021-03-11 | 2021-10-15 | 四川华能太平驿水电有限责任公司 | Speed regulation oil system of water turbine |
-
2021
- 2021-11-18 CN CN202111371539.4A patent/CN114017421A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06207608A (en) * | 1993-01-12 | 1994-07-26 | Toshiba Mach Co Ltd | Detecting method for oil leakage of oil pressure device |
| JPH0735331A (en) * | 1993-07-26 | 1995-02-07 | Matsushita Electric Ind Co Ltd | Fuel leakage sensing device |
| JP2004347013A (en) * | 2003-05-21 | 2004-12-09 | Sumitomo Metal Ind Ltd | Trouble determination method for hydraulic equipment and hydraulic equipment |
| US20130199619A1 (en) * | 2012-01-13 | 2013-08-08 | Gulfstream Services, Inc. | Method and apparatus for deactivating a hydraulic device that is leaking hydraulic oil |
| CN104047926A (en) * | 2014-06-20 | 2014-09-17 | 济钢集团有限公司 | Pump station oil leakage prevention and control method and system of hydraulic system and lubrication system |
| CN110300857A (en) * | 2017-02-24 | 2019-10-01 | 西门子歌美飒可再生能源公司 | Method and arrangement for detecting oil leakage between sections of a hydraulic cylinder |
| CN108131353A (en) * | 2018-01-17 | 2018-06-08 | 宣化钢铁集团有限责任公司 | A kind of hydraulic pressure leak-proof control device |
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