摘要
针对2N和N+1支撑转子轴系通过临界转速时振动过大的问题,搭建了2N(三跨六支撑)和N+1支撑(三跨四支撑)轴系实验台,模拟开机启动过程,试验研究两实验台轴系分别使用刚性、膜片和弹性联轴器时的振动特性。结果表明,N+1支撑方式可降低原2N支撑轴系对应的临界转速,且N+1支撑轴系各转轴的耦合更为强烈,容易激起相邻转轴的振动。使用刚性较小的联轴器时,2N和N+1支撑轴系振动均趋于平稳,说明轴系的耦合减弱,如2N支撑轴系测点1使用弹性联轴器时相比于使用刚性联轴器时在临界转速附近振动幅值降幅达50%。
In order to solve the problem that 2 N-span ＆ 2N-support rotor system and a N-span ＆ （ N ＋ 1） -support one have too large vibrations when passing through their critical speeds, their test benches were established to simulate their operation process. The vibration characteristics of two rotor systems connected with three kinds of coupling were studied. The results showed that if the 2N-support mode is replaced by the （ N ＋ 1） -support one, the critical speeds of the rotor system can be reduced; the coupling among rotating shafts of the rotor system with （ N ＋1） -support mode is stronger to easily excite vibrations of adjacent shafts; the vibrations of the 2N-support rotor system and the （ N ＋ 1 ）-support one tend to be steady when connected with smaller stiffness couplings, so the coupling among rotating shafts tends to be weaker; for an example, the vibration amplitude of the measurement point 1 on the rotor system with 2N-support when connected with flexible couplings is reduced by 50% near the critical speeds of the system, compared with that when connected with rigid couplings.
出处
《振动与冲击》
EI
CSCD
北大核心
2017年第5期164-168,191,共6页
Journal of Vibration and Shock
基金
国家重点基础研究发展计划("973"计划)(2012CB026000)
教育部博士点基金(20110010110009)
