CAJ | 학술논문

基于气体轴承-转子结构的轴系,选择同一透平膨胀机转子分别进行典型动压、静压、动静压气体轴承升速振动特性对比试验,分析转子低频涡动和振荡性能特征,同时结合不同气体轴承结构的作用机制,给出抑制或消除轴承低频振动措施及方法.结果表明:动压轴承通过改变内表面槽型线,静压轴承通过改变供气压力可以推迟或抑制低频振动发生;动静压轴承结合了动压和静压轴承的优点,能在较高转速下无低频运行.
기우기체축승-전자결구적축계,선택동일투평팽창궤전자분별진행전형동압、정압、동정압기체축승승속진동특성대비시험,분석전자저빈와동화진탕성능특정,동시결합불동기체축승결구적작용궤제,급출억제혹소제축승저빈진동조시급방법.결과표명:동압축승통과개변내표면조형선,정압축승통과개변공기압력가이추지혹억제저빈진동발생;동정압축승결합료동압화정압축승적우점,능재교고전속하무저빈운행.
Experimental studies of speed-up vibration characteristics were carried out on turbo-expander supported by hydrodynamic,hydrostatic and hybrid gas bearing. The low-frequency whirl and whip characteristics of rotors were ana-lyzed. Based on the working mechanisms of different bearings,the methods to improving low-frequency were brought up. The results show that changing the groove structure of dynamic bearings and changing the supply pressure of hydrostatic bearings can postpone or inhibit the low frequency vibration. Combining the advantages of dynamic and hydrostatic bear-ings,hybrid bearing can work at high speed without low frequency vibration.