Novel method for supporting high-speed motor rotor

Abstract

The invention discloses a non-contact method for supporting a high-speed motor rotor by using ultrasonic vibration. A bearing bush 2 with a conical surface is sleeved at each of the left end and the right end of the motor rotor 3; the bearing bushes 2 are respectively connected with an ultrasonic transducer 1; the inner conical surfaces of the bearing bushes 2 are matched with the outer conical surfaces of the ultrasonic transducers 1; when the ultrasonic transducers 1 are in an ultrasonic vibration states, the outer conical surfaces have suspension capacity; under the mutual action of the outer conical surfaces of the ultrasonic transducers 1 and the inner conical surfaces of the bearing bushes 2, suspension force is transmitted to the motor rotor 3, and motor rotor 3 is suspended under the extrusion action of the suspension force on two sides, so that an aim of supporting the motor rotor 3 without any contact is fulfilled; and moreover, the motor rotor 3 and a stator 4 are in a clearance non-friction state, so that high-rotating-speed rotation can be realized. The method has the advantages that an ultrasonic suspension supporting system is simple in structure, easy to control and high in stability; electromagnetic coupling does not exist between an ultrasonic suspension process and a motor, so that any influence on a rotating magnetic field of the motor can be avoided; and besides the conventional air floating, liquid floating or magnetic suspension, the invention provides another novel non-contact method for supporting the high-speed motor rotor.

Description

technical field [0001] The invention belongs to a suspension support method for a motor rotor, in particular to a non-contact support method for a motor rotor using ultrasonic vibration. Background technique [0002] High-speed motors are widely used in industrial fields such as high-speed machine tools, turbomolecular pumps, high-speed centrifuges, precision gyroscopes, and flywheel energy storage. Important and broad application prospects. The rotor of a traditional high-speed motor is supported by two mechanical bearings, which have high friction and wear, low life, poor reliability, and severe mechanical vibration and noise. The current solution to these problems is to use non-contact air bearings, liquid bearings or magnetic suspension bearings, which can basically achieve low-friction or friction-free operation, and increase the motor speed to a level above 50,000r / min. However, it also brings problems such as complex system structure, high energy consumption, low ef...

AI Technical Summary

Problems solved by technology

[0004] The present invention provides a non-contact support method for a motor rotor using ultrasonic vibrations, thereby solving the problems of large friction and wear, serious vibration and noise in existing contact friction bearings, and the problems of large volume, low efficiency, and low efficiency in non-contact bearings. Find an alternative solution to problems such as structural complexity

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