Internal leakage analysis and experiment in hydraulic control system of steam turbine inlet valve

Author:

Liu Ying1ORCID,Wang Qimin2,Li Xiaoxiao3,Wang Liming4

Affiliation:

1. School of Foreign Languages, Shenyang Institute of Engineering, Shenyang, China

2. College of Energy and Power, Shenyang Institute of Engineering, Shenyang, China

3. Department of New Energy Development, Liaoning Energy Investment(Group) Co., Ltd., Shenyang, China

4. Science and Technology Department, Shenyang Institute of Engineering, Shenyang, China

Abstract

In this paper, the transformation of steam turbine regulating system from mechanical hydraulic regulation to electro-hydraulic regulation is realized. And the internal leakage mechanism of the hydraulic control switch valve and the electro-hydraulic proportional valve in the system is analyzed. With the use of hydraulic simulation software AMESim, the mathematical model of the electro-hydraulic control system after transforming is established. The parameters of the hydraulic control switch valve and the electro-hydraulic proportional valve in the hydraulic control system of steam turbine inlet valve are studied under different internal leakage locations and different leakage degree, such as piston regulating time, steady position of piston, oil pressure and leakage flow flux. The fault characteristic table of internal leakage is obtained. An experimental platform for simulating internal leakage is built. The experimental curves of several physical quantities under different internal leakage conditions are obtained. The experimental results prove that the internal leakage has a great impact on the performance of the electro-hydraulic control system. The results of internal leakage experiment are consistent with those of internal leakage simulation.

Funder

basic scientific research project of colleges and universities in Liaoning province

Liaoning BaiQianWan Talents Program

Publisher

SAGE Publications

Subject

Industrial and Manufacturing Engineering,Mechanical Engineering

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