Online Dismantling and Installation of Unloading Valve for Hydraulic Servomotors in 1 036-MW Ultra-Supercritical Unit

doi:10.11930/j.issn.1004-9649.2013.5.6.2

Abstract

Abstract: It happened to a1 036-MW ultra-supercritical unit that the oil drainage plug at the bottom of the oil cylinder piston was fallen off, which caused the governor valve to operated abnormally. Online repairing was made for this issue. In order to ensure the security of unit operation, simulation was conduction a same type outage unit. The technical scheme of online dismantling and installation of the unloading valve for the hydraulic servomotor is presented, including the measures to maintain the normal operation of the unit and the issues which need to pay attentions in online repairing, as well as the process to restart the servomotor after the repairing. The result showed that the adopted technical measures are adequate and an unnecessary unit outage was avoided.

Key words: ultra-supercritical unit, steam turbine, hydraulic servomotor, unloading valve, oil drainage plug

CLC Number:

TM311

CHEN Fan-fu, ZHU De-yong, FENG Ting-You, ZHANG Ze-xiong. Online Dismantling and Installation of Unloading Valve for Hydraulic Servomotors in 1 036-MW Ultra-Supercritical Unit[J]. Electric Power, 2013, 46(5): 6-8.

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URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.1004-9649.2013.5.6.2

https://www.electricpower.com.cn/EN/Y2013/V46/I5/6

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Online Dismantling and Installation of Unloading Valve for Hydraulic Servomotors in 1 036-MW Ultra-Supercritical Unit

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