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试验研究航空发动机高压涡轮后支点轴承内环的装配工艺对转子支承系统振动特性的影响。改变转子轴承内环和内环衬套的配合公差与轴承内环锁紧螺母拧紧力矩,研究以上参数与转子支承系统振动响应的关系。结果表明:间隙配合和较小的锁紧螺母拧紧力矩给转子系统带来较强的非线性性,转子支承处出现丰富的分数倍频成分;过盈配合时转子振动对内环锁紧螺母拧紧力矩改变不敏感;间隙配合时,较大的锁紧螺母拧紧力矩可以抑制转子支承处的分数倍频成分。
Experimental Study on the Influence of Assembling Process of Backward Bearing Inner Ring on Vibration Characteristics of Rotor Support System of Aeroengine High Pressure Turbine. The relationship between the above parameters and the vibration response of the rotor support system was studied by changing the fitting tolerance of the inner ring and the inner ring of the rotor bearing and the tightening torque of the inner ring lock nut. The results show that the clearance fit and the smaller tightening torque of the lock nut bring more nonlinearity to the rotor system, and rich fractional frequency multiplication components appear on the rotor support. When the interference fit, the inner ring lock nut Tightening torque is not sensitive to change; With clearance fit, larger tightening torque of the lock nut can restrain the fractional frequency multiplication component at the rotor support.