Ultrasonic near-field suspension driving system

Abstract

The invention discloses an ultrasonic near-field suspension driving system. The system is based on a piezoelectric driving principle and an ultrasonic near-field suspension theory. Ultrasonic frequency bending vibration of a lower bending vibration piezoelectric transducer can generate an extrusion air film on the upper surface of a radiation disc, then a suspension force is generated to suspend arotor, the rotor can be kept in the center of the radiation disc by means of the texture structure of the lower surface of the rotor, and the suspension stability is improved. An upper longitudinal vibration piezoelectric transducer generates a longitudinal vibration sound field, and the rotor can be driven to rotate in a fixed direction by means of a texture structure on the upper surface of therotor. The rotating direction of the rotor can be changed by changing the texture direction of the upper surface of the rotor. Stable suspension and directional driving of the rotor are realized by adopting sound fields generated by the two piezoelectric transducers. The system is used for various non-contact operation or driving occasions, and can also be applied to a micro gyroscope system.

Description

technical field [0001] The invention belongs to the technical field of levitation drive, in particular to an ultrasonic near-field levitation drive system. Background technique [0002] With the development of the times, many materials have higher and higher requirements for surface precision. The traditional contact operation method has many disadvantages, such as the tiny particles generated during the contact process will scratch the surface of the material, and the contact parts will cause pollution. The material has defects such as wear and deformation. The use of non-contact operations to process materials can reduce mechanical wear, reduce local deformation, avoid contamination of materials during contact, and reduce defective rate to improve processing efficiency. Non-contact operation technologies include magnetic levitation, optical levitation, electrostatic levitation, pneumatic levitation, ultrasonic levitation, etc. However, magnetic levitation requires magnet...

AI Technical Summary

Problems solved by technology

However, magnetic levitation requires magnetically conductive materials and the system is relatively complex. The levitation force generated by optical levitation is very small, electrostatic levitation is only suitable for low temperature environments, and air levitation requires an external air supply filter device with a complex structure.

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