Mechanism of Acoustic Levitation and Reducing Fraction Analysis and Basic Experimental Study on the Ultrasonic Bearing
|Course||Mechanical Manufacturing and Automation|
|Keywords||Piezoelectric transducer Ultrasonic vibration Ultrasonic antifriction Ultrasonic levitation Ultrasonic bearing|
Bearings are important parts of the machinery and equipment , and its purpose is to support the shaft and shaft parts and transmit motion and power . Bearing performance will directly affect the performance of the entire rotation accuracy of the shafting and the whole machine . With the rapid development of modern manufacturing technology , the performance requirements of the bearing . The in -depth study of the piezoelectric science, ultrasonics , tribological and mechanical design theory and existing bearing performance analysis based on ultrasonic bearing first proposed the concept of this new technology has been applied for national invention patent new technologies . Departure from the basic theory of ultrasonic vibration suspension antifriction on the the ultrasonic vibration suspension and antifriction mechanism and the feasibility of supporting to ultrasonic vibration structure bearing suspended . The formation of ultrasonic vibration suspension with the the antifriction the key components - the performance of the piezoelectric transducer , a lot of theoretical analysis and experimental research . Transducers and vibration modes of the transducer vibration parameters such as impedance of the transducer , the resonant frequency of the test ; analysis by the finite element method , the transducer vibration mode , select suitable ultrasonic vibration suspension antifriction and transducer impedance matching calculation and testing to maximize the ultrasonic transducer ultrasonic power . Self-developed ultrasonic bearing with a piezoelectric transducer . The state of the ultrasonic vibration is tested transducer radiation end surface and the relationship between the levitation gap , the levitation gap and the load in the suspension between the parts as well as to form a friction pair with the other member when the friction coefficient ; summarizes the impact of the ultrasonic vibration suspension antifriction factor. Designed on this basis ultrasonic thrust bearing , and the basic performance of the ultrasonic thrust bearings designed experimental study ; the ultrasonic radial bearing envisaged . The results showed that ultrasonic bearings have excellent antifriction properties and suspending properties , the conditions are the same conditions , its friction-reducing properties superior to non - liquid friction sliding and rolling element bearings . Visible , ultrasonic bearing has a good prospect of application .