摘要
车用球轴承涡轮增压器气流激振力包括密封流体激振力和叶顶间隙气流激振力。针对某型号车用球轴承涡轮增压器，分别应用Black模型和Alford模型，计算得到密封流体激振力和叶顶间隙气流激振力。将计算结果代入模型进行仿真计算，得到密封流体激振力和叶顶间隙气流激振力对增压器转子系统临界转速、稳定性、不平衡响应的影响规律。分别与临界转速实验结果、与未添加叶顶间隙气流激振力模型计算结果、未添加密封流体激振力和叶顶间隙气流激振力的计算结果进行对比分析，结果表明：密封流体激振力增加系统阻尼，降低球轴承涡轮增压器转子系统的振幅，提升系统的稳定性；气流激振增加系统交叉刚度，降低系统稳态响应振幅。
Abstract
The gas excitation force on vehicular ball bearing turbocharger consists of sealing fluid excitation force and tip clearance gas excitation force. Therefore, sealing fluid excitation force and tip clearance gas excitation force in a certain vehicular turbocharger can be calculated with the application of Black model and Alford model. The model was simulated with the calculation results so that the influence of sealing fluid excitation force and tip clearance gas excitation force on the critical speed, stability and instability response of the rotor system can be concluded. After that, the simulation was compared with the outcome of critical speed experiment, model without tip clearance gas excitation force solely and model without sealing fluid excitation force and tip clearance gas excitation force jointly. The final result shows that: the sealing fluid excitation force has a damping matrix, which decreases the amplitude and improves the stability of ball bearing-rotor system in turbocharger; gas excitation increases the cross-coupled stiffness and lowers the amplitude in steady system.
关键词
涡轮增压器 /
转子动力学 /
密封流体激振力 /
叶顶间隙气流激振力
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Key words
turbocharger /
rotor dynamics /
sealing fluid excitation force /
tip clearance gas excitation force
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黄若;张威力;邢卫东;张烨.
气流激振对球轴承涡轮增压器转子动力学特性的影响[J]. 振动与冲击, 2014, 33(19): 140-146
HUANG Ruo ZHANG Wei-li XING Wei-dong ZHANG Ye .
Gas excitation’s influence on ball bearing turbocharger rotor dynamics[J]. Journal of Vibration and Shock, 2014, 33(19): 140-146
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脚注
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