| Rotating machinery has a wide range of applications used in industrial production. However, because of its long-term continuous operation at the high load environment and other reasons, such as installation and change of operation status, rotating parts would eventually have problems that could bring vibration and noise, reducing work efficiency, increasing security risks and even causing equipments to shutdown. Among these problems, rotor unbalance fault takes more than 60%. So in order to decreasing the vibration of the unit, avoiding accidents and preventing equipment faults, it is necessary to do dynamic balance tests.This paper took rotating machinery as an example, it analyzed the fault of unbalanced rotor. Firstly, monitor the condition of the fault. Through researching the common faults of rotating machinery, this paper described signal characteristics of the unbalanced rotor system, and diagnosed the causing of unbalanced rotor successfully by steady-state data analysis and transient-state data analysis, at the same time it proposed a reasonable scheme to solve the faults. Secondly, according to the different characteristics of the rotor system, the treatment measures were divided into three types:single, double and multi-faceted imbalance, then put forward to the corresponding measures. Thirdly, this paper analyzed the affecting factors in field balancing; including the choices of trial weighs, correction planes, influence coefficient and hysteresis phase lag, the proper parameters can improve the accuracy of field balancing tests. This paper also discusses both disassembling and not disassembling trial weight methods, analyzing their applicabilities. Finally, the paper raised a relatively complete error analysis method, through the analysis of on-site dynamic balancing which combined with engineering practice method, it proved the proper methods of checking the error, and the balance reached to the ideal effect. |
PDF Full Text Request