Fixed form of hydraulic servomotor in electro-hydraulic control system

Abstract

The invention provides a fixed form of a hydraulic servomotor in an electro-hydraulic control system. The fixed form solves the problems of quick ageing and invalidation of a guide sleeve and a pipe joint sealing element of the hydraulic servomotor because the hydraulic servomotor close to an oil cylinder works under a high-temperature environment for a long term. The fixed form is characterized in that: a hydraulic servomotor bracket is fixed on a table top at one end of an inverse T-shaped transition plate, the hydraulic servomotor is fixed on the hydraulic servomotor bracket in an inverse mode, and one end of the transition plate is fixed on a bent plate; and a lever is provided by using an upright post of the T-shaped transition plate as a pivot (C), one end of the lever is hinged (A) with a hydraulic servomotor piston rod, the other end of the lever is hinged (B) with a driving high-pressure adjusting valve lever mechanism, and two sides of the pivot (C) are provided with equal arms. The fixed form has the advantage that the hydraulic servomotor is integrally moved outside to keep away from the oil cylinder serving as a heat source.

Description

technical field [0001] The invention relates to a fixed form of an oil motor in an electro-hydraulic control system of a steam turbine. Background technique [0002] The fixed form of the oil motor of the electro-hydraulic control system of the steam turbine is that the oil motor is fixed on the curved plate close to the high-pressure cylinder block of the steam turbine through the transition plate, and the piston rod of the oil motor drives the high-pressure regulating valve through the lever mechanism. Since the oil motor is rooted on the bent plate, and the bent plate is close to the high-pressure cylinder block, the oil motor is directly subjected to the radiation heat of the high-pressure cylinder block and the conduction heat of the bent plate, causing the temperature at the piston rod of the oil motor to reach as high as 180°C to 200°C ℃, working in a high temperature environment for a long time will lead to the rapid aging and failure of the guide sleeve of the oil m...

AI Technical Summary

Problems solved by technology

Since the oil motor is rooted on the bent plate, and the bent plate is close to the high-pressure cylinder block, the oil motor is directly subjected to the radiation heat of the high-pressure cylinder block and the conduction heat of the bent plate, causing the temperature at the piston rod of the oil motor to reach as high as 180°C to 200°C ℃, working in a high temperature environment for a long time will lead to the rapid aging and failure of the oil motor guide sleeve and the pipe joint seal, losing the sealing effect and causing oil leakage

Affect the safe and reliable operation of the unit

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