CAJ | 학술논문

针对大型旋转机械通过临界转速时振动过大问题，搭建双跨转子实验台，模拟试车过程。不改变转子轴系原有支撑形式，在两根轴上分别安装一台自主设计的磁流变阻尼器，实验研究阻尼器对轴系各跨转子振动影响规律。结果表明，阻尼器可有效抑制所在轴临界转速附近的振动，而对相邻轴无影响。据实验结果提出由开关控制双跨转子轴系通过两阶临界转速过程中的振动。结果表明，开关控制可在线抑制转子轴系通过临界转速时振动，避免轴系因振动过大被迫停机。
침대대형선전궤계통과림계전속시진동과대문제，탑건쌍과전자실험태，모의시차과정。불개변전자축계원유지탱형식，재량근축상분별안장일태자주설계적자류변조니기，실험연구조니기대축계각과전자진동영향규률。결과표명，조니기가유효억제소재축림계전속부근적진동，이대상린축무영향。거실험결과제출유개관공제쌍과전자축계통과량계림계전속과정중적진동。결과표명，개관공제가재선억제전자축계통과림계전속시진동，피면축계인진동과대피박정궤。
In order to solve the problem that the vibration of rotating machinery is usually too large around the critical speed,a bench for two-span rotors system test was established to simulate the starting process.Without changing original supports of the rotors system,two self-designed magneto-rheological dampers were installed on each shaft. Different working conditions were set to study the influences of different mounting position and operating current of dampers.The results show that the damper can reduce the vibration of the shaft where the damper was installed near the critical speed.According to the test results,an on-off control method was proposed to control the two-span rotors'vibration.The results show that the on-off control method can reduce the vibration when the rotors went through the critical speed of first and second orders without stopping the machine.