Counter weight method for hydro-generator rotor dynamic balancing test

• Main Authors: SHEN WEICHENG, ZENG XUYAO, ZHENG XIANGYU, GOU XIAOJUN, LIU XIULIANG, LI ZHEN, ZHANG JIANWEI, ZHEN WENXI, MA XIPING, WANG BIN, TONG HUANZHEN, DONG KAISONG, JIANG MEI, ZHAO YAO, ZHAO WEI, MIN ZHANKUI
• Format: Patent
• Language: Chinese; English
• Published: 15.06.2016
• Subjects: MEASURING; PHYSICS; TESTING; TESTING STATIC OR DYNAMIC BALANCE OF MACHINES ORSTRUCTURES; TESTING STRUCTURES OR APPARATUS NOT OTHERWISE PROVIDED FOR

The invention discloses a counter weight method for a hydro-generator rotor dynamic balancing test. The method comprises following steps: testing vibration parameters of a hydro-generator unit under conditions of different rotation speed and of different excitation current, and analyzing the vibration performance, evaluating the initial weight and position of tentative added weight; making multiple magnetic bases be absorbed at a certain position of an pre-determined generator rotor according to the weight and position of the estimated tentative added weight; starting up a machine again and performing a test with changed rotation speed and changed excitation current, and analyzing whether the tentative counter weight and position are suitable or not; manufacturing permanent counter weight blocks according to the calculation results and analyzing and evaluating the counter weight results. The main feature of the method is that the magnetic base counter weight blocks are not required welding so that it is conve