Analysis on reasons of bearing vibration of 330MW steam turbine in changeover from single valve mode into sequence valve mode

Huadian Technology ›› 2011, Vol. 33 ›› Issue (2): 6-7.

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Analysis on reasons of bearing vibration of 330MW steam turbine in changeover from single valve mode into sequence valve mode

ZENG Qi

Urumqi Thermal Power Plant of Huadian Xinjiang Power Generation Corporation Limited ，Urumqi 830017, China

Received:1900-01-01 Revised:1900-01-01 Online:2011-02-25 Published:2011-02-25

Abstract

Abstract: In Urumqi Thermal Power Plant of Huadian Xinjiang Power Generation Corporation Limited, after the operation mode of steam turbine No.1 was changed over from single valve mode into sequence valve mode, the bearing vibration of turbine No.1 in X,Y direction increased to about 200μm, which has a strong impact on unit safety; so the turbine operation mode had to be changed over into single valve mode again. The single valve operation mode causes larger cutoff loss, and the steam rate of the unit will increase, the economical efficiency of the unit will reduce. The open sequence of single valve mode and sequence valve mode was regulated, the unit vibration had been controlled less than 70μm, and the desired effects were obtained. 

Key words: single valve operation, vibration, reason analysis, open sequence of single valve mode and sequence valve mode

ZENG Qi. Analysis on reasons of bearing vibration of 330MW steam turbine in changeover from single valve mode into sequence valve mode[J]. Huadian Technology, 2011, 33(2): 6-7.

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Analysis on reasons of bearing vibration of 330MW steam turbine in changeover from single valve mode into sequence valve mode

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