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某涡轮风扇发动机振动故障是台架试车及外场使用中频繁出现的主要故障之一,是影响我公司发动机生产交付的主要技术瓶颈。在发动机振动故障中,有前机匣振动,偶有后机匣和发附机匣出现振动的情况,尤以中介机匣振动故障为主。按照该型发动机结构及振动机理分析,中介机匣振动主要是由于转子不平衡,弹性支承挤压油膜失效等原因引起的。所以,对转子动平衡、弹性支承工作原理有必要进行深入的试验与分析,针对振动形式的不同,采用相应的更加有效的排故方式及控制措施,提高发动机的试车合格率,降低修理成本。
A turbofan engine vibration fault is one of the major faults frequently encountered in bench test and field operation. It is a major technical bottleneck affecting the delivery of engine production of our company. In the engine vibration failure, there is vibration of the front case, occasionally vibration of the case and the attachment case occur, especially the vibration of the case. According to this type of engine structure and vibration mechanism analysis, the vibration of the intermediate box is mainly caused by the unbalance of the rotor and the failure of the elastic supporting squeeze film. Therefore, it is necessary to carry out in-depth test and analysis on the working principle of dynamic balance and elastic support of the rotor. According to the different forms of vibration, the corresponding more effective troubleshooting methods and control measures are adopted to improve the test passing rate of the engine and reduce the repair cost.