Study on Vibration Control of Double Motor Refrigeration Unit in Nuclear Power Plant

¹ Suzhou Thermal Engineering Research Institute Co., Ltd Shenzhen, Guangdong Province, China
² Yangjiang Nuclear Power Co., Ltd, Yangjiang, Guangdong Province, China

^a email: yuanliang@cgnpc.com.cn
^b email: zhanshuwen@cgnpc.com.cn
^c email: chenheyang@cgnpc.com.cn
^d email: baijinchuan@cgnpc.com.cn
^e email: cairui@cgnpc.com.cn
^f email: kongxiangyong@cgnpc.com.cn
^g* Corresponding author: email: P196463@cgnpc.com.cn

Abstract

In order to solve the problem of excessive vibration during the operation of the refrigeration unit in nuclear power plant, taking the double motor refrigeration unit in operation as the research object, we studied the effective measures to reduce the vibration and improve the stiffness of the double motors in the near resonance region. On the basis of theoretical calculation, the weaknesses of the equipment stiffness were reinforced and reconstructed, and the secondary analysis and calculation of the stiffness and seismic performance of the reformed refrigeration unit were carried out to determine the feasibility of the optimization scheme. Based on the analysis, we optimized the equipment. After that, there was a significant decrease in the vibration of the refrigeration unit. The vibration measurement results indicated that the vibration value of the unit has dropped to the qualified range, effectively avoiding the equipment damage caused by excessive vibration. We provided a complete set of analysis ideas for the research and solution of vibration problems of rotating equipment in nuclear power plant.