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Radial foil bearing with sealing function

A technology of foil bearings and foils, applied in the field of radial foil bearings, can solve the problems of deformed top foils not acting as bearings, not trying foil bearings, etc.

Inactive Publication Date: 2010-09-01
科特博公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Moreover, no attempt has been made so far to simultaneously function as a seal with foil bearings. Although foil seals have been tried with seals in the form of foil bearings, the form of a deformed top foil has not played the role of a bearing.

Method used

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  • Radial foil bearing with sealing function
  • Radial foil bearing with sealing function
  • Radial foil bearing with sealing function

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0018] figure 1 Shown is a typical form of foil bearings used so far, figure 2 Shown is a version of the foil bearing with a thickened tip foil 3 . Since the surrounding gas acting as lubricating oil can flow to the place with the raised foil 2, it is difficult to add a seal, and the performance of the seal is greatly reduced due to the movement of the shaft 6.

[0019] Thus, the foil bearing can be made to seal with only a slight gap between the shaft 6 and the top foil 3 , thus giving it the function of a seal.

[0020] The present invention is to figure 2 The structure of the raised radial foil bearing shown is modified so that it functions as a seal. Such as image 3 , Figure 4 As shown, by using a lathe-machined top foil 3 of sufficient thickness and a plug 7 capable of covering the gap between the raised foils 2, only a tiny gap exists between the shaft 6 and the bearing and all others are removed. The flow gap can provide high performance sealing function.

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PUM

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Abstract

The present invention provides a radial foil bearing having a sealing function, comprising a top end foil (3) which has a thickness t of more than or equal to 0.1.D0.33, and a plug (7) which is capable of preventing a bearing component from falling off and shielding a space of the gas as a lubricating oil to pass through raised foils (2), wherein t is the thickness (mm), D is a shaft diameter (mm). According to the radial foil bearing, the plug (7) which is capable of shielding the space between the raised foils (2) is arranged so that a slight gap is kept between a shaft (6) and the top end foil (3), and a high-performance sealing function with a least gap is provided.

Description

technical field [0001] The invention relates to a radial foil bearing with sealing function. Background technique [0002] Bearings can be roughly divided into rolling bearings (using balls or rollers), oil-free bearings (using lubricating materials for friction and movement), sliding bearings (using oil), gas bearings, and magnetic bearings (using magnetic force for non-contact action) . Sliding bearings are further divided into hydrodynamic sliding bearings and static pressure sliding bearings. The dynamic pressure sliding bearings support the shaft by generating oil pressure through relative sliding motion; the hydrostatic sliding bearings support the shaft by supplying high-pressure oil from the outside of the bearing. Gas bearings use gas instead of oil, and their working principle is the same as that of sliding bearings. If pressurized gas is input from the outside, it is a static pressure gas bearing, and if pressure is generated by relative sliding motion, it is a ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16C27/02F16C33/74F16C33/10F16C17/02
CPCF16C17/024F16C2240/60
Inventor 李宪席
Owner 科特博公司
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