GMA可控油膜轴承的静态试验研究

Static Testing Investigation of Controllable Hydrodynamic Bearing with Gaint Magnitostrictive Actuator

介绍了GMA可控油膜轴承试验台的结构和工作原理,在调整好的试验台上,在不同载荷和转速下完成了GMA可控油膜轴承的定心试验。结果表明,通过改变GMA的控制电流或者磁场,该可控油膜轴承能够把不同工况下的转子的静平衡位置调整到同一位置,证明该轴承具有很高的位置精度和定心精度,克服了传统油膜轴承定心精度差的不足,可用于支承位置精度要求较高的场合。

The structure and the principle of the testing rig supported by the controllable journal bearing with gaint mag- nitostrictive actuator（GMA） were introduced. The testing rig was built up, and auto -alignment tests of the controllable bearing with GMA were completed on the rig under different loads and rotary speeds. The results show that, for the control- lable bearing - rotor system, the static equilibrium position of the rotor center can be adjusted to the same position under different working conditions through setting GMA＇ s magnetic field or current. It is proved that the controllable hydrody- namic bearing has outstanding position and alignment precise, it overcomes the shortcomings of traditional hydrodynamic bearings and can be used in such fields that have higher requirement of locational precise to the bearings.