Dynamic pressure intelligent air bearing

A technology of air bearings and bearings, which is applied in the testing of measuring devices, instruments, and mechanical parts, and can solve the problems of small mechanical deformation and applying pre-pressure, so as to improve stiffness characteristics, stability, and signal detection accuracy Effect

Active Publication Date: 2022-03-04
HUNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the mechanical deformation of PZT is relatively small and the preload needs to be continuously applied during the working process, which has limitations in application.

Method used

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  • Dynamic pressure intelligent air bearing
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Embodiment Construction

[0020] The present invention will be further described below in conjunction with the accompanying drawings and specific examples. However, it will be appreciated that the following specific embodiments are merely preferred embodiments of the invention, and is not to be construed as limiting the invention.

[0021] Such as figure 1 and figure 2 As shown, a dynamic intelligent air floating bearing includes: a bearing right end cap (1), a bearing sleeve (2), a bearing left end cap (3), pressure sensor (4) (9), a three-level amplifying mechanism (5), Sensor protective layer (6), PZT (7), temperature sensor (8), vibration sensor (10) (11) (12), a top foil (13), and a holder (14).

[0022] Such as Figure 4 As shown, the dynamic pressure air floating intelligent bearing is in operation, the vibration signal is performed by the first stage triangle amplification, the second stage lever amplification, the third stage triangle amplification transmission to the pressure sensor (4) (4) 9), th...

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PUM

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Abstract

The invention discloses a dynamic pressure intelligent air bearing which comprises a bearing left end cover, a bearing sleeve, a bearing right end cover, piezoelectric ceramics (PZT), a pressure sensor, a vibration sensor, a temperature sensor, a sensor protection layer, a three-stage amplification mechanism, a retainer and a top foil. A pressure sensor and a vibration sensor are placed in a sensor protection layer at the bottom end of a three-stage amplification mechanism, a temperature sensor is placed on the back face of top foil, PZT is placed in symmetrical lever arm through grooves, the top foil is made of elastic materials and covers the three-stage amplification mechanism, and the three-stage amplification mechanism is fixed to a bearing sleeve through a retainer, a bearing left end cover and a bearing right end cover by bolts. A power supply signal coupling lever mechanism of a PZT is controlled through a sensor signal to amplify PZT deformation, a top foil is supported through a three-stage amplification mechanism, direct contact between a sensor and a rotating part is avoided, gas film pressure and vibration signals generated when an air bearing works are measured through the three-stage amplification mechanism, the measurement precision is improved, and the bearing characteristics are intelligently controlled.

Description

Technical field [0001] The present invention relates to a dynamic pressure intelligent air floating bearing, which belongs to the field of dynamic pressure gas floating bearing. Background technique [0002] The dynamic pressure gas floating bearing is composed of top foil, elastic structure, and bearing sleeve. It is a wedge-shaped space to generate a wedge-shaped space to generate a support for a gas having a certain viscous gas using a relative motion between the rotary rotor and the bearing. The air float bearing of the gas film supported, and its stiffness and damping are determined by the bearing structure and the lubricating gas film. [0003] Conventional dynamic pressure air flore bearing is through a wedge effect, and the rotor high-speed rotary extruded gas generates a motion pressure effect to support the load rotor, and its dynamic characteristics have a very significant effect on the overall dynamic characteristics of the rotating machine. Due to its complex working...

Claims

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Application Information

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IPC IPC(8): G01M13/045
CPCG01M13/045
Inventor 冯凯曹纪超张凯
Owner HUNAN UNIV
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