Ultrahigh rotating speed oil bearing for powder metallurgy and manufacturing method thereof

A technology of powder metallurgy and manufacturing method, applied in the field of sintered oil-impregnated bearings and their manufacturing, can solve the problems of reduced air permeability of sintered oil-impregnated bearings, increased apparent viscosity of oil, deterioration of lubricating oil circulation, etc. The effect of uniform powder distribution and reduced frictional resistance

Inactive Publication Date: 2010-07-14
JIANGSU YINGQIU GRP CO LTD
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  • Abstract
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  • Claims
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Problems solved by technology

If a large amount of fine graphite powder is added as a solid lubricant, the air permeability of the sintered oil-impregnated bearing will be greatly reduced, thereby deteriorating the circulation of lubricating oil in the bearing
In addition, the graphite powder mixed in the lubricating oil may also incr

Method used

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  • Ultrahigh rotating speed oil bearing for powder metallurgy and manufacturing method thereof
  • Ultrahigh rotating speed oil bearing for powder metallurgy and manufacturing method thereof
  • Ultrahigh rotating speed oil bearing for powder metallurgy and manufacturing method thereof

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Embodiment Construction

[0018] The embodiments of the present invention will be described in further detail below in conjunction with the accompanying drawings. This embodiment is implemented on the premise of the technical solution of the present invention, and detailed implementation methods are provided, but the protection scope of the present invention is not limited to the following embodiments. .

[0019] The powder metallurgy ultra-high speed oil-impregnated bearing of the present invention contains Cu27-54% Sn3-6% MoS in composition by weight percentage 2 2-6% La or Ce 0.2-2% the rest Fe and unavoidable impurities.

[0020] Such as figure 1 , 2 Shown, the manufacturing method of powder metallurgy ultra-high speed oil-impregnated bearing of the present invention, it adopts adding MoS 2 powder as a solid lubricant and rare earth as an active catalyst and strengthening agent for Cu-Sn and Fe matrix, which makes Fe-Cu alloy distribution easier to combine at low temperature. After mixing or low...

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Abstract

The invention discloses an ultrahigh rotating speed oil bearing for powder metallurgy and a manufacturing method thereof. The bearing comprises the following components in percentage by weight: 27-54% of Cu, 3-6% of Sn, 2.2-6% of MoS, 0.2-2% of La or Ce and the balance of Fe and inevitable impurities. The bearing is manufactured by carrying out processes of mixing, low-temperature diffusion, press forming, sintering, reshaping and oil immersion treatment on mixture formed by proportionally mixing the powders. Solid lubricant and rare earth which are used as an active catalyst and an enhancer for a basis material of the bearing are added to the bearing, thereby being benefical to grain refinement; and weeny through holes are generated on a sintering body, and the connectivity rate is more than 95 percent. When the bearing rotates at a high speed, an oil film is formed on the inner wall of the bearing by the lubricating oil, and the bearing is applicable to an ultrahigh rotating speed motor with the rotating speed being more than 34000 rpm.

Description

technical field [0001] The invention relates to a sintered oil-impregnated bearing and a manufacturing method thereof, in particular to a powder metallurgy ultra-high-speed oil-impregnated bearing and a manufacturing method thereof. technical background [0002] The micro-motor bearings used in various machinery and equipment require good anti-friction performance, and require low mechanical sliding friction noise when the rotating shaft rotates at high speed in the bearing. At present, the oil-impregnated bearings are required to reach the specified PV value when the motors with ultra-high speeds (34,000 rpm or more) start running. Under the state of boundary lubrication, conventional bearings will produce a lot of wear when they start running. Matrix strengthening is often used to improve wear resistance, such as adding phosphorus and adding solid lubricants to improve boundary lubrication. If a large amount of fine graphite powder is added as a solid lubricant, the air p...

Claims

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Application Information

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IPC IPC(8): C22C9/00C22C38/60B22F3/16
Inventor 申承秀
Owner JIANGSU YINGQIU GRP CO LTD
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