As a kind of promising noncontact bearings, ultrasonic bearings actuated by smart materials such as lead zirconate titanate ceramics show a good application prospect in high-speed machines and precision-measuring devices. The suspending force is one of the most important parameters that play a dominated role on the bearing’s static and dynamic performance. A suspending force model based on acoustic radiation theory for cylindrical object near sound source is built to predict the radial carrying capacity of an ultrasonic bearing actuated by three piezoelectric transducers. To validate the model, an ultrasonic bearing prototype is developed and a testing system is established. For observing the bearing’s dynamic running performance at high speeds, the bearing’s running experiment is carried out and the rotor center’s trajectory data and frequency spectrum are acquired to analyze the bearing’s dynamic characteristics at high speeds. The suspending force model and running performance experiments will contribute to the design, detection, and test of this type of bearings.

作为一种很有前途的非接触轴承，由锆钛酸铅陶瓷等智能材料驱动的超声波轴承在高速机械和精密测量设备中具有良好的应用前景。悬挂力是最重要的参数之一，对轴承的静态和动态性能起着主导作用。建立了基于声辐射理论的圆柱形物体靠近声源的悬浮力模型，以预测由三个压电换能器驱动的超声轴承的径向承载能力。为了验证模型，开发了超声波轴承原型并建立了测试系统。为了观察轴承在高速下的动态运行性能，进行了轴承的运行实验，并获得了转子中心的轨迹数据和频谱，以分析轴承的高速动态特性。悬挂力模型和运行性能实验将有助于此类轴承的设计，检测和测试。