Sintered metal bearing

A technology of sintered metal and bearings, which is applied in bearings, bearing components, liquid cushion bearings, etc., and can solve the problems of reduced lubricating oil passing through and easy crushing

Inactive Publication Date: 2014-12-10
NTN CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] That is, since copper is a relatively soft metal, when copper is used as the main component, the internal pores of the sintered metal bearing are easily crushed, and as a result, the oil permeability (under a specified pressure , the ease of passing the lubricating oil when the lubricating oil is transported from the inner diameter side to the outer diameter side of the sintered metal bearing) decreases

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0096] In order to verify the effect of the first invention of the present application, sintered metal bearings formed of raw material powders mainly composed of copper-based powder and iron-based powder containing fine copper powder at a certain ratio, and sintered metal bearings formed of raw material powders with a conventional composition For metal bearings, a wear test and an oil permeability measurement test were performed to compare and evaluate each characteristic.

[0097] Here, among the test materials, CE-15 manufactured by Fukuda Metal Foil Powder Co., Ltd. was used as the pure copper powder used as the copper-based powder, and Hegner was used as the pure iron powder used as the iron-based powder. NC100.24 manufactured by Sri Lanka Co., Ltd. and DAP410L manufactured by Daido Special Steel Co., Ltd. were used as the stainless steel powder. In addition, in this experiment, graphite powder, tin powder which is a low-melting-point metal, and phosphorus powder were used...

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Abstract

Provided is a sintered metal bearing formed from a starting material power of which a copper based powder and an iron based powder are principal components, and having a radial bearing surface on the inside periphery, wherein the copper based powder used is one in which an ultrafine copper powder of a particle size distribution in which the proportion of particles less than 45 µm in diameter is 80 wt% or more constitutes one-third or more, expressed as ratio by weight, of the total copper based powder; and the compact obtained by compaction molding of the starting material power is sintered at 900ºC to 1000ºC inclusive.

Description

technical field [0001] The present application (the first invention of the present application) relates to a sintered metal bearing, in particular to a copper-iron sintered metal bearing. In addition, the present application (the second invention of the present application) relates to a raw material for a fluid dynamic bearing device, a shaft member using the raw material, and a fluid dynamic bearing device using the shaft member. Background technique [0002] Sintered metal bearings are used by impregnating lubricating oil into the internal air pores. As the shaft inserted into the inner periphery rotates relative to the inside, the lubricating oil impregnated inside seeps out to the sliding part with the shaft to form an oil film. The shaft is rotatably supported. Such sintered metal bearings are used as bearings for motors mounted in various electrical equipment represented by information equipment because of their excellent rotational accuracy and quiet performance. Mor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16C33/14F16C17/02F16C33/10
CPCF16C17/026F16C33/104F16C33/145F16C2204/60F16C2204/10F16C33/128F16C2370/12F16C17/107F16C32/0629F16C32/0666
Inventor 堀政治赤井洋栗村哲弥伊藤冬木
Owner NTN CORP
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