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Air bearing unit

An air bearing and air technology, applied in bearings, shafts and bearings, mechanical equipment, etc., can solve problems such as complex structures

Active Publication Date: 2014-05-28
OILES CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This complicates the structure

Method used

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Examples

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Embodiment Construction

[0029] Now, embodiments of the present invention will be described with reference to the accompanying drawings.

[0030] First, the structure of an air bearing unit 1 with pulleys according to the present embodiment will be described. Here, an example is given in which the air bearing unit 1 with a pulley rotatably supports a pulley 20 for carrying a wire such as an optical fiber.

[0031] figure 1 (A) and 1(B) are external views and side views showing the air bearing unit with pulleys according to the present embodiment. figure 2 is an exploded view of the air bearing unit 1 with pulleys.

[0032] As shown in the figure, the air bearing unit 1 with pulleys of this embodiment includes: a pulley 20 as an object to be supported; The pulley 20 is rotatably supported without contact; the thrust plate 11 which prevents the pulley 20 from coming off the air shaft 10 ; and the nut 12 which fixes the thrust plate 11 to the air shaft 10 . The pulley 20 is assembled to the air shaf...

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PUM

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Abstract

Provided is a structure for a compact air bearing unit which, with the use of a simple configuration, more stably supports without contact a part rotating at high speed. Fluid (t) is supplied to a radial bearing gap (60) from a porous sintered layer (102) to form a fluid film within the radial bearing gap (60), and the fluid (t) in the form of gas is discharged from the radial bearing gap (60) to thrust bearing gaps (61a, 61b) connecting to the radial bearing gap (60). The fluid film is formed within the thrust bearing gaps (61a, 61b) utilizing the discharged gas (t1). Since the fluid (t) in the form of gas discharged from the radial bearing gap (60) is supplied to the thrust bearing gaps (61a, 61b), it is not necessary to additionally provide the air bearing unit with a groove and a thrust bearing surface, the groove discharging the fluid (t) in the form of gas from the radial bearing gap (60), the thrust bearing surface ejecting the fluid (t) to the thrust bearing gaps (61a, 61b).

Description

technical field [0001] The present invention relates to a structure of an air bearing unit which more stably supports a high-speed rotating part such as a pulley in a non-contact state with a simple structure. Background technique [0002] Patent Document 1 describes an air bearing unit (aerostatic bearing unit) that supports a rotating shaft without contact. [0003] This air bearing unit has an air bearing (aerostatic bearing) of the porous throttle type (using a porous body such as porous graphite) to be composed of bearing surfaces (thrust bearing surface and Radial bearing surface) receives the thrust load and radial load of the shaft (rotating shaft), which is inserted into this cylindrical housing. Here, the radial bearing surface is opposed to the outer peripheral surface of the shaft, so that a radial bearing gap is formed between the radial bearing surface and the outer peripheral surface. The thrust bearing surface opposes a flange formed on the outer periphery ...

Claims

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Application Information

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IPC IPC(8): F16C32/06
CPCF16C32/0614
Inventor 上田智士武藤哲夫富田博嗣
Owner OILES CORP