Open AccessSuspending force modeling based on nonlinear acoustics and high-speed running experiments for an ultrasonic journal bearing
Author(s) -
He Li,
Yu Wang,
Deen Bai,
Lyu Fuyan,
Kuidong Gao,
Qingliang Zeng
Publication year - 2020
Publication title -
advances in mechanical engineering/advances in mechanical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.318
H-Index - 40
eISSN - 1687-8140
pISSN - 1687-8132
DOI - 10.1177/1687814020940470
Subject(s) - bearing (navigation) , ultrasonic sensor , acoustics , lead zirconate titanate , rotor (electric) , nonlinear system , helicopter rotor , air bearing , piezoelectricity , engineering , mechanical engineering , computer science , physics , electrical engineering , quantum mechanics , slider , artificial intelligence , dielectric , ferroelectricity
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.