Non-contact ultrasonic motor of bowl-type traveling wave mode ball rotors

A non-contact, ultrasonic motor technology, applied in the direction of generator/motor, piezoelectric effect/electrostrictive or magnetostrictive motor, electrical components, etc., can solve the problem of non-contact transmission of spherical bearing mechanism, etc., Achieve compact structure, high processing and assembly, easy installation and application

Inactive Publication Date: 2011-08-17
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current non-contact ultrasonic motors are mostly disc or cylindrical rotors, which cannot realize non-contact transmission of spherical bearing mechanisms

Method used

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  • Non-contact ultrasonic motor of bowl-type traveling wave mode ball rotors
  • Non-contact ultrasonic motor of bowl-type traveling wave mode ball rotors
  • Non-contact ultrasonic motor of bowl-type traveling wave mode ball rotors

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Experimental program
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Embodiment Construction

[0014] The structure and working principle of the present invention will be described in detail below with reference to the drawings and specific embodiments.

[0015] A bowl type traveling wave type ball rotor non-contact ultrasonic motor, characterized in that it includes a spherical rotor 1, a bowl type stator 2, an annular piezoelectric ceramic 3, an elastic pad 4 and a support device 5, wherein the spherical rotor 2 is located in the bowl type In the cavity of the stator 2; the annular piezoelectric ceramic 3 is located on the lower end surface of the bowl-shaped stator 2; the elastic pad 4 is located on the lower end surface of the bowl-shaped stator 2; the supporting device 5 is located on the bottom surface of the elastic pad 4. The annular piezoelectric ceramic 3 adopts the method of equal division and division;

[0016] The driving end face of the stator is a bowl-shaped cavity, which is used to drive a spherical rotor with the same radius;

[0017] The bowl-type st...

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Abstract

The invention discloses a non-contact ultrasonic motor of bowl-type traveling wave mode ball rotors, belonging to the field of micromotors. The non-contact ultrasonic motor mainly comprises ball rotors, bowl type stators, annular piezoelectric ceramics, elastic cushions and supporting devices. When the piezoelectric ceramics are electrified with a specific alternating-current voltage in an ultrasonic frequency domain, the parts that the bowl type stators are matched with the ball rotors form travelling waves so as to induce travelling wave sound fields between the rotors and the stators. Acoustic radiation pressures in the travelling wave sound fields are utilized to suspend the ball rotors, thus the generated acoustic viscous forces are used to drive the rotors to rotate. The ultrasonic motor is the non-contact ultrasonic motor, is simple and compact in structure and low in cost, is easy to process and assemble and the like.

Description

[0001] technical field [0002] The bowl type traveling wave ball rotor non-contact ultrasonic motor of the present invention belongs to the non-contact ultrasonic motor in the field of micro motors. Background technique [0003] Ultrasonic motor is a new type of micro motor using the inverse piezoelectric effect of piezoelectric ceramics and ultrasonic vibration. Among them, the bowl-type traveling wave ball rotor non-contact ultrasonic motor is a kind of traveling wave non-contact ultrasonic motor. The stator and rotor are not directly contacted to drive the speed to increase the speed and avoid friction loss. It is easy to achieve high speed of the motor. It has broad application prospects in the field of aerospace, non-contact bearing transmission, non-contact material transmission, etc. The current non-contact ultrasonic motors are mostly disc or cylindrical rotors, which cannot realize the non-contact transmission of the spherical bearing mechanism. The inventi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02N2/10H02N2/16
Inventor 陈超李繁贾兵
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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