Mechanical emergency device for low-pressure oil engine of steam turbine

Abstract

The invention discloses a mechanical emergency device for a low-pressure oil engine of a steam turbine. In normal operation of the steam turbine, the opening degree of a rotating partition is controlled by the low-pressure oil engine, and the rotating partition comprises a partition body and a protruding arm fixed to the partition body. The opening degree of the rotating partition can be changed or adjusted by moving the protruding arm as needed. The mechanical emergency device comprises a supporting assembly, a fixing device, an adjusting bolt and a first adjusting nut, wherein the supportingassembly comprises a lateral supporting device and a vertical supporting device that are mutually perpendicular, and the lateral supporting device is provided with a threaded hole; the fixing deviceis fixedly connected to the protruding arm; one end of the adjusting bolt is connected to the fixing device and the other end of the adjusting bolt is connected to the threaded hole of the lateral supporting device; and the first adjusting nut is used for engaging with the adjusting bolt to adjust the fixing device to the appropriate position. The mechanical emergency device can realize manual intervention in the movement of the rotating partition and a sliding valve of the low-pressure oil engine in the event of failure of the low-pressure oil engine, a low-pressure CPC and a pilot valve, thereby preventing the rotating partition from moving with the increase of the steam pressure.

Description

technical field [0001] The invention relates to the technical field of steam turbines, in particular to a mechanical emergency device for a low-pressure oil motor of a steam turbine. Background technique [0002] Generally speaking, in a turbogenerator set consisting of a steam turbine and a generator, the steam turbine uses steam as the working medium to convert thermal energy into mechanical energy, which then drives the generator to generate electricity. In steam turbine equipment, the oil motor is an important hydraulic amplification and actuator. During the power generation process of the turbo-generator set, the low-pressure CPC (current to pressure converter, current to pressure converter) controls the action of the oil motor to realize the movement of the rotating diaphragm as a steam valve, thereby adjusting the steam extraction volume. The steam extraction system refers to the pipelines and equipment related to the steam extraction of the steam turbine. It adopts ...

AI Technical Summary

Problems solved by technology

However, when the low-pressure oil motor, low-pressure CPC and wrong throttle fail, as the amount of steam entering increases, when the low-pressure steam extraction system is not put into operation, the rotating baffle and the low-pressure oil motor operate automatically, causing the extraction safety valve to Action, and can not be adjusted, can only reduce the load, reduce the steam pressure in the unit

Therefore, the above-mentioned structure in the prior art can threaten the stable operation of the unit, and at present, there is no other effective solution except load reduction

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