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Design of a noncontact spherical bearing based on near-field acoustic levitation

机译:基于近场声悬浮的非接触球面轴承设计

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摘要

Based on near-field acoustic levitation, a noncontact bearing with a spherical rotor was proposed to explore its potential application for novel supporting bearing of suspended gyro. The stator of the noncontact bearing has a hollow bowl-shaped configuration, in order to produce acoustic levitation force for a spherical object Two orthogonal flexural standing waves were piezoelectrically generated and led to a traveling wave in the stator, and then the induced high-intensity sound in the air gap between the stator and spherical rotor could apply levitation force and even driving force for the spherical rotor. In this article, finite element model of a bowl-shaped piezoelectric stator was built, and the dynamic analysis and parametric optimization for the stator have been conducted. The prototypes were manufactured and vibration parameters of the stators were experimentally obtained. The test system for the noncontact spherical bearing was built, and its levitation and driving characteristics were measured. The spherical rotor successfully achieved levitation and noncontact rotation based on near-field acoustic levitation and the experimental results preliminarily indicate the feasibility of near-field acoustic levitation for suspended gyro.
机译:基于近场声悬浮,提出了一种带球形转子的非接触轴承,以探讨其在新型悬浮陀螺支撑轴承中的潜在应用。非接触轴承的定子为空心碗形,以产生球形物体的声悬浮力。压电产生两个正交的弯曲驻波,并在定子中产生行波,然后感应出高强度。定子和球形转子之间的气隙中的声音可能会对球形转子施加悬浮力甚至驱动力。本文建立了碗形压电定子的有限元模型,并对定子进行了动力学分析和参数优化。制造了原型,并通过实验获得了定子的振动参数。建立了非接触球面轴承的测试系统,并测量了其悬浮和驱动特性。球形转子在近场声悬浮的基础上成功实现了悬浮和非接触旋转,实验结果初步表明了悬浮陀螺仪近场声悬浮的可行性。

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  • 作者单位

    State Key Laboratory of Mechanics and Control for Mechanical Structures, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China;

    State Key Laboratory of Mechanics and Control for Mechanical Structures, Nanjing University of Aeronautics and Astronautics, Nanjing, China;

    State Key Laboratory of Mechanics and Control for Mechanical Structures, Nanjing University of Aeronautics and Astronautics, Nanjing, China;

    State Key Laboratory of Mechanics and Control for Mechanical Structures, Nanjing University of Aeronautics and Astronautics, Nanjing, China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Ultrasonic motor; spherical bearing; acoustic levitation; suspended gyro;

    机译:超声波马达球面轴承声悬浮悬浮陀螺;

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