Novel gas suspension bearing

A gas suspension and bearing technology, applied in the direction of bearings, shafts and bearings, mechanical equipment, etc., can solve the problem of small bearing capacity and achieve the effect of large and stable suspension force

Pending Publication Date: 2022-04-29
HUNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the problem that the squeezed gas and the synthetic jet gas are applied to the gas bearing, each of which has a small load-carrying capacity, the present invention proposes a new type of gas suspension bearing

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] figure 1 It is the appearance diagram of Embodiment 1 of the present invention, figure 2 It is a schematic diagram of the overall structure of Embodiment 1 of the present invention. In the present invention, by controlling the input signals of the upper and lower excitation units (5) and (7), the upper and lower metal thin films (2) and (4) generate vertical vibrations in opposite directions.

[0026] Cylinder top cover (1) is fixed during work.

[0027] When the upper metal film (2) vibrates upward, a positive force of squeezing and suspension is generated, and the volume of the cavity (3) is increased at the same time, at this time, the lower metal film (4) vibrates downward, and the volume of the cavity (3) increases , the cavity (3) inhales more gas, extrudes the positive force to compensate the suction of the synthetic jet, and produces a suspension force to carry the object (9); when the upper metal film (2) vibrates downward, a negative extrusion force is gene...

Embodiment 2

[0029] Figure 4 It is a schematic diagram of the overall structure of this embodiment. The basic structure of this embodiment is the same as that of Embodiment 1, and the upper structure remains unchanged. The difference is that the lower metal film (4) in this embodiment only serves as a seal. And the cylinder casing (3) is changed into a stacked annular piezoelectric sheet, and after the excitation signal is input, the cylinder casing (3) is made to do the vibration form of stretching up and down.

[0030] Cylinder top cover (1) is fixed during work.

[0031] The top metal film (2) still vibrates up and down. When it vibrates upwards, it produces a positive force of extruding and suspending, and at the same time increases the volume of the cavity (6). (6) Inhale more gas, squeeze the positive force to compensate the suction of the synthetic jet, and generate a suspension force to carry the object (7); when the metal film (2) vibrates downward, a negative extrusion force ...

Embodiment 3

[0033] Figure 5 It is a schematic diagram of the overall structure of this embodiment. In this embodiment, the vibration of the metal film on the upper part of the cylinder and the bottom of the cylinder is canceled, and the cylinder head (1) is enlarged. A stacked annular piezoelectric sheet is selected as the cylinder shell (3), so that the cylinder shell (3) vibrates up and down.

[0034] The cylinder bottom (5) is sealed during work.

[0035] When the whole component is working, only the cylinder wall (3) is energized to vibrate. When the cylinder wall (3) is elongated, it drives the top cylinder head (1) to squeeze air upwards, generating a positive extrusion force, and at the same time, the volume of the cavity (4) will also increase, and the cavity (4) will inhale air, generating The suction of the synthetic jet, at this time, the positive force is squeezed to compensate the synthetic jet suction of the cavity (4), and the levitation force is generated to carry the ...

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Abstract

The invention discloses a novel gas suspension bearing. The bearing supports an object through the coupling effect of extrusion gas and synthetic jet gas. The device has the specific effects that firstly, the metal film (2) at the upper end vibrates at high frequency to extrude a gas film between the metal film (2) and a bearing object (9), a high-pressure gas film is formed when the metal film (2) vibrates upwards and is in positive extrusion, and the pressure intensity of the gas film is reduced when the metal film (2) vibrates downwards and is in negative extrusion; the alternate extrusion process acts on the gas to increase the energy of the gas and generate suspension force. And 2, when the metal film (4) at the lower end vibrates at high frequency and upwards vibrates, the volume of the cavity is reduced, air is blown out, thrust is generated on a supporting object (9), and when the metal film (4) vibrates downwards, air around the hole (8) is sucked into the cavity, suction force is generated, but the average force of the whole period is still positive thrust. And 3, controlling an excitation signal to enable the metal films (2) and (4) to compensate the negative effects of each other by using respective positive effects, so that the bearing continuously has positive suspension force in the whole period, and the average suspension force of the whole bearing is obviously higher than that of a single suspension mode.

Description

technical field [0001] The invention relates to the active flow control technology and the gas suspension effect of near-field ultrasonic extrusion, and specifically relates to a new type of gas suspension bearing. The method obtains a larger stable suspension force. Background technique [0002] As a new type of non-contact technology, near-field ultrasonic extrusion levitation technology has the advantages of compact structure, strong controllability and no limitation of suspended object materials. Its application fields include biology, chemistry, rotating machinery and micro-electromechanical systems, etc. , has been studied by more and more scholars. Its levitation force is obtained by averaging the positive extrusion force and negative extrusion force generated by the vibration of the vibrator up and down within a cycle. Since the negative extrusion force has a weakening effect on the positive extrusion force, its overall average suspension force is small, which limi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16C32/06
CPCF16C32/0611
Inventor 李文俊蔡深岭冯凯雷新沛
Owner HUNAN UNIV
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