摘要
某电厂安装4台50MW混流式水轮发电机组,其导轴承均为抗重螺钉调整的分块巴氏合金瓦结构。该结构在机组检修后,根据各轴瓦间隙设计值调整抗重螺钉位置并用螺母锁紧,但机组运行一段时间后多次出现轴瓦间隙变化的现象,造成机组轴线摆度超标、瓦温升高,影响机组的安全稳定运行。为解决此问题,将原抗重螺钉调整轴瓦结构改为楔形板调整。改造完成后,再未发生轴瓦松动及轴瓦间隙变化的情况,提高了机组运行的稳定性。
A power plant is equipped with four 50 MW fC-turbine generators whose guide bearings are all block Babbitt tile structures with anti-screw adjustment.After the maintenance of the unit,the structure adjusts the position of the anti-weight screw and locks it with nuts according to the design value of the clearance of each bearing bush.However,after the unit runs for a period of time,the phenomenon of the clearance of the bearing bush changes for many times,resulting in the excessive pendulum of the unit axis and the high temperature of the tile,which affects the safe and stable operation of the unit.In order to solve this problem,the structure of the bearing bush adjusted by counterweight screw is changed to wedge plate adjustment.After the transformation is completed,the bearing bush looseness and clearance change do not occur,which improves the stability of unit operation.
作者
王佩
WANG Pei(Hunan Wuling Ha Electric Energy Efficiency Technology Co.,Ltd.,Changsha 410004)
出处
《现代制造技术与装备》
2023年第5期168-170,共3页
Modern Manufacturing Technology and Equipment
关键词
混流式机组
导轴承
轴瓦间隙
mixed-flow unit
guide bearing
bushing clearance
