An oil circuit control system for a door-adjusting oil motor

Abstract

The invention discloses an oil path control system of control valve hydraulic servo-motor. The oil path control system comprises a power supply end, an oil supply end, a hydraulic servo-motor, quick-closing valves and an operation valve, and further comprises a control device and a hydraulic detection device used for detecting the hydraulic pressure of the oil supply end. The control device can control a connector, communicating with the oil supply end, on the operation valve to be closed after judging the fact that the power supply end has power the detection value of the hydraulic detectiondevice is smaller than a preset hydraulic pressure value. In the oil path control system, whether the power supply end has power or not is judged through the control device so that whether the quick-closing valves are required to be powered on can be judged. According to the fact that the detection value of the hydraulic detection device is smaller than the preset value, it can be quickly judged that the quick-closing valves are powered off, accordingly, it can be effectively judged that power of the power supply end is not transmitted to the quick-closing valves, and the fact that a wire is broken can be judged. When it is judged that the wire is broken, the connector, communicating with the oil supply end, on the operation valve is controlled to be closed in time, tripping of a steam turbine is effectively avoided, and thus, the problem that a steam turbine unit is tripped when the quick-closing valves are powered off abnormally can be effectively solved.

Description

technical field [0001] The invention relates to the field of steam turbines, and more specifically relates to an oil circuit control system for a throttle-adjustable oil motor. Background technique [0002] Generally, there are two high-adjustment doors and two middle-adjustment doors on the steam turbine, and each adjustment door is equipped with an oil circuit control system. At present, the common oil circuit control system includes oil motor, quick closing valve, operation valve, oil supply terminal and power supply terminal. [0003] The oil motor is divided into a working chamber and an oil return chamber by a piston rod. The movement of the piston rod can push the opening and closing. When the working chamber is supplied with high-pressure oil, it will push the piston to move to compress the oil return chamber. At this time, the piston rod pushes the adjustment door to open. , the oil return chamber returns oil to the oil cylinder; when the working chamber stops supp...

AI Technical Summary

Problems solved by technology

[0008] In view of this, the purpose of the present invention is to provide an oil circuit control system for the valve-adjusting oil motor, which can effectively solve the problem of tripping of the steam turbine unit when the quick-closing valve is abnormally powered off

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