摘要
为解决某超高速转子系统的失稳碰摩问题,以干摩擦阻尼耗散转子涡动能量理论为依据,采用一种自由安装式干摩擦片减振结构(干摩擦阻尼器).该结构在转轴上安装波形弹性垫片及干摩擦片,通过螺母预紧力矩向波形弹性垫片及各干摩擦片提供轴向正压力.干摩擦片随转子振动并产生相对运动,从而耗散转子涡动能量,达到减振、增强转子稳定性的目的.通过实验不同数量的干摩擦片和不同预紧力矩的组合寻找满足工程稳定性的减振器结构参数.结果表明:干摩擦阻尼器适用于高速、轻载转子系统的减振、增稳,可以有效降低转子振动,控制转子涡动发散的趋势;所用实验方法有助于快速获得满足工程稳定性的减振结构参数.
A kind of freely assembled dry friction vibration absorber was presented to solve the problems of instability and rubbing faults for a super-high speed rotor system based on theory of dry friction dissipating energy from rotor vibration.In this structure,a wave-shaped elastic pad and some dry friction pads were freely assembled on shaft,and axial normal force was provided for elastic pad and dry friction pads by pre-loaded moment for nut.When friction pads moved with shaft,the relative movements between them could dissipate vibration energy from rotor system,absorb vibration and enhance system stability.The configuration format meeting the stability in engineering for the damper of the studied rotor system has been acquired by testing different groups of dry friction pads and pre-loaded moment.The results show that dry friction damper is suitable for high speed and light loaded rotor system to restrain vibration and enhance its stability.The testing routine is helpful to find a comfortable configuration format in engineering of dry friction damper.
出处
《航空动力学报》
EI
CAS
CSCD
北大核心
2011年第5期1135-1141,共7页
Journal of Aerospace Power
基金
国家985工程项目
关键词
超高速转子
减振结构
干摩擦阻尼器
稳定性
转子振动
super-high speed rotor
vibration absorber
dry friction damper
stability
rotor vibration
