Control device and method for deflector of impulse water turbine
A technology of control devices and deflectors, which is applied in safety devices, machines/engines, hydroelectric power generation, etc., can solve the problems of deflection devices out of control, and achieve high safe operation, good practical reliability, and good maintainability
Pending Publication Date: 2017-05-17
武汉长江控制设备研究所有限公司 +1
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Problems solved by technology
However, when the pilot valve itself fails, the deflector will lose control
Method used
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Embodiment Construction
[0013] The present invention will be further described below in conjunction with accompanying drawing:
[0014] A deflector control device for an impact turbine, including a pilot valve 4 and a main control valve 6, wherein: the deflector control device for an impact turbine also includes a purely mechanical overspeed protection valve 1, an emergency solenoid valve 2, and an emergency pressure distribution valve 3. Shuttle valve 5; the main control valve 6 adopts a pilot-operated hydraulic control valve, and the emergency pressure distribution valve 3 adopts a spring return hydraulic control valve;
[0015] The pressure oil port P4 of the pilot valve 4 of the main control valve 6 is connected to the control port A3 of the emergency pressure distribution valve 3; the control port A1 of the purely mechanical overspeed protection valve 1 is connected in series with the control port A2 of the emergency solenoid valve 2 to The hydraulic control end of the accident pressure distribu...
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The invention provides a control device and method for a deflector of an impulse water turbine. The control device for the deflector of the impulse water turbine comprises a pilot valve and a main control valve. The control device for the deflector of the impulse water turbine is characterized in that the control device further comprises a purely-mechanical overspeed protection valve, an accident electromagnetic valve, an accident distributing valve and a shuttle valve; a pilot valve pressure oil port P4 of the main control valve is connected with a control port A3 of the accident distributing valve; a control port A1 of the purely-mechanical overspeed protection valve acts on the hydraulic control end of the accident distributing valve after being connected with a control port of A2 of the accident electromagnetic valve in series, and the hydraulic control end of the accident distributing valve communicates with an pressure oil port P1 through the control port A2 of the accident electromagnetic valve and the control port A1 of the purely-mechanical overspeed protection valve; and a first input port A5 of the shuttle valve communicates with drain oil through the pilot valve, a second input port B5 of the shuttle valve is connected with a control port B3 of the accident distributing valve, and a port C5 of the shuttle valve is connected with the hydraulic control end of the main control valve. By adoption of the control device for the deflector of the impulse water turbine, the common problem that the deflector is out of control due to malfunction of the pilot valve is solved, and safe operation of a unit is better guaranteed; and the control device is practical, reliable and good in maintainability.
Description
technical field [0001] The invention relates to a control device for a deflector of a hydraulic turbine, in particular to a control device for a deflector of an impact type hydraulic turbine and a control method thereof. Background technique [0002] The deflection device is an important part of the impact turbine unit, which cooperates with the nozzle to control the size and direction of the water flow entering the runner of the unit. When the deflector is opened, the water flow through the nozzle impacts the runner to provide kinetic energy; when the deflector is closed, the water flow from the nozzle is cut off. When the nozzle control part fails, the deflector must be closed quickly and reliably in order to prevent the unit speed from continuing to rise. [0003] The working principle of the early impact turbine units is generally: the deflector and the nozzle act in conjunction, the deflector acts as the main control stage, and the nozzle follows the opening of the def...
Claims
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IPC IPC(8): F03B15/22
CPCF03B15/22Y02E10/20
Inventor 王爱生潘熙和黄业华方斌臣
Owner 武汉长江控制设备研究所有限公司