虑及多转速的核心机转子高速动平衡试验

为满足航空发动机整机动平衡对转子不平衡振动精稳抑制的需求，采用虑及多转速状态的转子高速动平衡优化配平方 法，开展了核心机转子动平衡试验。以核心机转子系统为对象，研究在高压压气机转子第4、9级盘上配重抑制高压涡轮振动的可 行性。综合考虑核心机转子在多转速下的振动状态，以残余振动平方和及残余振动最大值为目标函数，采用优化算法对配平方案 进行优化，制定了核心机转子高速动平衡方案。在核心机转子系统试验台上分别进行了单平面-单转速、单平面-多转速、双平面- 单转速以及双平面-多转速动平衡的试验。结果表明：采用虑及多转速状态的转子高速动平衡优化配平方法能使因不平衡引起的 核心机转子振动在工作转速区间内均有所减小。

Study on High-Speed Dynamic Balance Test of Core Engine Rotor Considering Multi-Speed State

In order to meet the demand for precise suppression of rotor unbalance-induced vibration of the whole engine dynamic bal? ance, an optimized balancing method for high-speed dynamic balance considering the multi-speed state was adopted to carry out the dy? namic balance test of the core engine rotor. Taking the core engine rotor system as the object of study, the feasibility of suppressing high pressure turbine vibration by adding counterweights on the 4th-stage disc and 9th-stage disc of high-pressure compressor rotor was stud? ied. Considering the vibration state of the core engine rotor at multiple speeds, taking the sum of squares of residual vibration and the maxi? mum residual vibration as the objective function, an optimization algorithm was used to optimize the balancing scheme, and the scheme of high-speed dynamic balance of the core engine rotor was formulated. Dynamic balance tests of single-plane single-speed, single-plane multi-speed, double-plane single-speed, and double-plane multi-speed were carried out respectively on the core engine rotor system test bed. The results show the optimized balancing method for high-speed dynamic balance considering multi-speed state can reduce the rotor vibration of the core engine caused by unbalance in the working speed range.