Novel steam turbine servo redundancy control system
A technology of redundant control and control system, applied in the direction of servo motor, servo motor assembly, fluid pressure actuation system safety, etc., can solve problems such as inability to work, easy failure of MOOG, economic loss of users, etc.
Active Publication Date: 2021-04-30
浙江汽轮成套技术开发有限公司
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Problems solved by technology
[0010] The disadvantage of the above servo control system is that the MOOG is prone to failure and cannot work, and the MOOG must be shut down before maintenance and replacement
[0011] The disadvantage of the above servo control system is: the servo card and the MOOG servo valve are both one. When the MOOG valve and the servo card fail, they must be shut down to repair, which will give users bring economic loss
Method used
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[0037] Further description will be given below in conjunction with the embodiments shown in the accompanying drawings.
[0038] The new steam turbine servo redundant control system shown in the attached figure, including oil circuit system and control system;
[0039] The oil system includes:
[0040] 1) The oil inlet of the control oil is connected to the cut-off valve 1 and the filter element through the oil pipe, and then divided into two circuits, one of which is connected to the stop valve 4, the MOOG valve 2 (the first port of the MOOG valve 2, the second port of the MOOG valve 2), and the cut-off valve in turn. Valve 10 and cartridge valve 1 (the first port, the other way is connected to stop valve 6, MOOG valve 1 (first port of MOOG valve 1, second port of MOOG valve 1), stop valve 11 and cartridge valve 2 3 interface;
[0041]The second port of cartridge valve 1 is connected in parallel with the second port of cartridge valve 2, and then connected to the upper chamb...
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The invention relates to a steam turbine control system. According to the technical scheme, the novel steam turbine servo redundancy control system is characterized by comprising an oil way system and a control system; according to the oil way system, a control oil inlet is divided into two ways after communicating with a filter element through an oil pipe, one way communicates with a first connector of a second MOOG valve and a second connector of the second MOOG valve and then communicates with a first connector of a first cartridge valve, and the other way communicates with the first connector of the first MOOG valve and a second connector of the first MOOG valve and then communicates with a third connector of a second cartridge valve; a second interface of the first cartridge valve and a second interface of the second cartridge valve are connected in parallel and respectively communicate with an upper cavity of a hydraulic servo-motor and a second interface of a third cartridge valve through oil pipes; and two branches are led out of the oil pipe between a first stop valve and the filter element. According to the servo redundancy control system, when the MOOG valve or a servo card breaks down, it can still be guaranteed that the servo control system is controlled to operate normally, so that the normal production order of an enterprise is maintained, and unnecessary losses are avoided.
Description
technical field [0001] The invention relates to a steam turbine control system, especially a servo redundant control system. Background technique [0002] The structure of the oil pressure control system of a conventional steam turbine is (see figure 2 ): [0003] According to the oil inlet direction of the hydraulic oil, the oil pipe is connected to the cut-off valve 1 and then divided into two routes. One route is connected to the filter element and the MOOG valve in turn, and then connected to the second port of the upper chamber of the oil motor and the cartridge valve respectively; the other route is connected to the electromagnetic valve. The first port of valve 1; the second port of solenoid valve 1 is connected to the first port of solenoid valve 2, and the second port of solenoid valve 2 is connected to the fourth port of the cartridge valve; the fourth port of solenoid valve 1 and The fourth port of solenoid valve 2 is connected in parallel and then connected to ...
Claims
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IPC IPC(8): F15B11/08F15B13/04F15B20/00F15B21/02F01D17/26
CPCF15B11/08F15B13/04F15B20/008F15B21/02F01D17/26Y02P90/02
Inventor 沈方华胡晓江何捷
Owner 浙江汽轮成套技术开发有限公司