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A Small Foil Gas Dynamic Pressure Bearing

A gas dynamic pressure bearing and foil technology, which is applied in the direction of sliding contact bearings, rotating bearings, bearings, etc., can solve problems such as difficult assembly to bearing seats, unstable dynamic characteristics of bearings, and difficult processing of continuous wave foils, etc., to achieve Improve installation, good stability and anti-interference ability, large damping effect

Inactive Publication Date: 2019-03-12
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a small foil gas dynamic pressure bearing, which solves the difficulty of continuous wave foil processing to a certain extent. Improve the stability and bearing capacity of existing small gas bearings

Method used

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  • A Small Foil Gas Dynamic Pressure Bearing
  • A Small Foil Gas Dynamic Pressure Bearing
  • A Small Foil Gas Dynamic Pressure Bearing

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Embodiment Construction

[0021] The present invention will be further described below in conjunction with the accompanying drawings.

[0022] Such as figure 1 As shown, a small foil gas dynamic pressure bearing includes a bearing housing 1 , a top layer of herringbone groove foil 2 and a double-layer elastic wave foil structure 3 . The bearing seat 1 is the main structure of the bearing, which plays the role of installation, fixing, protection and support; the top herringbone groove foil 2 is the inner surface of the bearing, see figure 2 , so that the bearing has a continuous and regular air pressure distribution; the double-layer elastic wave foil structure 3 provides certain damping and stiffness. Such as image 3 As shown, the double-layer elastic wave foil structure 3 is evenly distributed between the bearing body 1 and the top-layer herringbone groove foil 2, and there are N pieces in total.

[0023] Such as Figure 4 As shown, the double-layer elastic wave foil structure 3 is composed of a...

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Abstract

The invention discloses a small aerodynamic foil bearing. The small aerodynamic foil bearing comprises a bearing seat, wherein a double-layer elastic bump foil structure and a top-layer herringbone groove foil are sequentially arranged in the bearing seat; the double-layer elastic bump foil structure is subjected to circumferential location through a superposition arc connected with the top-layer herringbone groove foil; the elastic bump foil structure is composed of an outwards-bulged elastic bump foil and an inwards-sunken elastic bump foil; the inner-side concave surface of the double-layer elastic bump foil structure is connected with the outer surface of the top-layer herringbone groove foil in a fitting manner; the outer-side convex surface of the double-layer elastic bump foil structure contacts with the inner surface of the bearing seat; the bearing seat plays the roles of installation, fixation, protection and supporting; and a herringbone groove is formed in the inner surface of the top-layer herringbone groove foil and a matching surface of the bearing and a rotary shaft is formed. The bearing disclosed by the invention solves the problems of difficult machining for a continuous bump foil, high rigidity of a top-layer foil, difficult assembly for the top-layer foil onto the bearing seat, unstable dynamic characteristic of the bearing, and the like to a certain extent, and improves the stability and the bearing capacity of an existing small gas bearing.

Description

technical field [0001] The invention relates to the technical field of gas (air) bearings, in particular to a small foil gas dynamic pressure bearing. Background technique [0002] As an important part of high-speed gas-powered rotating machinery, gas bearings mainly operate in harsh environments, such as small gas turbines, turbochargers, gas circulators and backup power units. Not only can it provide power for mechanical systems, but it is also a very important actuator, such as small gas turbines for robot servo systems, artificial heart, propellers for drones, mechanical control systems for small robots and small satellites, etc. In recent years, with the development of laser processing, 3D printing, and other technologies, it has provided indispensable technical support and development opportunities for the development of small rotating machinery. However, as the basic core component in the mechanical control system, the bearing has been lagging behind the development ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16C17/00F16C33/04
CPCF16C17/00F16C33/04
Inventor 丁千王斌
Owner TIANJIN UNIV
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