Theoretical investigation of vibration attenuation mechanism of a adaptive squeeze film damper
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摘要: 研究了带金属橡胶环自适应挤压油膜阻尼器ASFD/MRR(Adaptive Squeeze Film Damper with Metal Rubber outer-Ring)的减振机理,以ASFD/MRR和转子轴颈的受力分析和运动分析为基础,从N-S方程、流体连续方程出发,推导了ASFD/MRR的雷诺方程并求解了油膜压力场.对比ASFD/MRR和挤压油膜阻尼器SFD减振机理的特点,指出SFD仅是ASFD/MRR的特殊形式,ASFD/MRR具有抑制双稳态跳跃等非线性振动的能力,适用于更大的不平衡量范围.Abstract: Vibration attenuation mechanism of an adaptive squeeze film damper with metal rubber outer-ring(ASFD/MRR) was investigated. Based on static strength analysis and motional analysis of an ASFD/MRR and an axes-s neck of rotor, Reynold equations were deduced from Nevier-Stockes equation and liquid continuous equation,and pressure field of squeeze film was solved. Comparing vibration attenuation mechanism of ASFD/MRR with a squeeze film damper(SFD), the result indicates that SFD is a special form of ASFD/MRR. ASFD/MRR can markedly restrain the occurrence of nonlinear vibration phenomenon such as bistable characteristic and it can be suitable for wider range of unbalance level.
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Key words:
- dampers /
- rotors /
- vibration attenuation /
- metal rubber
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