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首页> 外文会议>International Symposium on Stability Control of Rotating Machinery(ISCORMA-4); 20070827-31; Calgary(CA) >STABILITY ANALYSIS OF A HIGH-SPEED SEAL TEST ROTOR WITH MARGINAL AND EXTENDED SQUEEZE-FILM DAMPERS—THEORETICAL AND EXPERIMENTAL RESULTS
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STABILITY ANALYSIS OF A HIGH-SPEED SEAL TEST ROTOR WITH MARGINAL AND EXTENDED SQUEEZE-FILM DAMPERS—THEORETICAL AND EXPERIMENTAL RESULTS

机译：具有边际和延伸挤压膜阻尼器的高速密封试验转子的稳定性分析-理论和实验结果

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摘要

A case study of a high-speed seal test rotor shows how rotor dynamic analysis can be used to diagnose the source of high vibrations and evaluate a proposed remedy. Experimental results are compared with the synchronous and non-synchronous whirl response analysis of a double overhung, high-speed seal test rotor with ball bearings supported in 5.84- and 12.7-mm-long, un-centered squeeze-film oil dampers. Test performance with the original damper of length 5.84 mm was marginal. Non-synchronous whirling occurred at the overhung seal test disk and there was a high amplitude synchronous response near the drive spline above 32,000 rpm. Nonlinear synchronous unbalance and time transient whirl studies were conducted on the seal test rotor with the original and extended damper lengths. With the original damper design, the nonlinear synchronous response showed that unbalance could cause damper lockup at 33,000 rpm. Alford cross-coupling forces were also included at the overhung seal test disk for the whirl analysis. Sub-synchronous whirling at the seal test disk was observed in the nonlinear time transient analysis. With the extended damper length of 12.7 mm, the sub-synchronous motion was eliminated and the rotor unbalance response was acceptable to 45,000 rpm with moderate rotor unbalance. Seal test rotor orbits and vibration levels with the extended squeeze film dampers showed smooth operation to 40,444 rpm.
机译：高速密封测试转子的案例研究表明，如何使用转子动力学分析来诊断高振动源并评估建议的解决方案。将实验结果与双悬垂的高速密封测试转子的同步和非同步涡流响应分析进行了比较，该转子的滚珠轴承支撑在5.84和12.7 mm长的无心挤压膜油阻尼器中。长度为5.84毫米的原始减震器的测试性能很小。在悬臂密封测试盘上发生了非同步旋转，并且在高于32,000 rpm的驱动花键附近有高幅度的同步响应。在具有原始和扩展阻尼器长度的密封测试转子上进行了非线性同步不平衡和时间瞬态涡旋研究。对于原始的风门设计，非线性同步响应表明不平衡会导致风门在33,000 rpm时锁死。悬空密封测试盘上还包括Alford交叉耦合力，用于旋转分析。在非线性时间瞬态分析中，在密封测试盘处观察到次同步回旋。随着减震器长度的延长（12.7毫米），亚同步运动得以消除，转子不平衡响应在中等转子不平衡的情况下达到45,000 rpm是可接受的。密封测试转子的轨道和加长的挤压膜阻尼器的振动水平显示了40,444 rpm的平稳运行。

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