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Self-lubricating angle contact ball bearing

An angular contact ball bearing and self-lubricating technology, which is applied to bearing components, shafts and bearings, mechanical equipment, etc., can solve the problems of corrosion resistance and high temperature resistance, high temperature resistance and corrosion resistance, and failure to pass the bearing salt spray test. Solve the problem of dust prevention, the friction coefficient is small, and it is beneficial to the effect of heavy load

Inactive Publication Date: 2004-11-24
上海市轴承技术研究所有限公司
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Problems solved by technology

The stainless steel materials of the inner and outer rings of the existing alternative bearings, some are resistant to high temperature and corrosion, and some are resistant to corrosion and high temperature, such as commonly used bearing steel (ZGCr15 Group A bearing steel containing 1.5% chromium) and stainless steel (9Cr18Mo Carbon content 0.9%, chromium 18%, molybdenum 1%) all failed the bearing salt spray test

Method used

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  • Self-lubricating angle contact ball bearing
  • Self-lubricating angle contact ball bearing

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Embodiment Construction

[0011] see figure 1 , a self-lubricating angular contact ball bearing, comprising a rolling body 3, a bearing inner ring 2, and a bearing outer ring 1. The rolling element 3 is a silicon nitride (Si3N4) ceramic ball, and the silicon nitride (Si3N4) ceramic ball is subjected to high temperature and high pressure (2000°C, 2000kg / cm 2 ) post-treatment to improve the easily corroded grain boundary phase and improve the stability of the ceramic ball. Bearing inner ring 2 and bearing outer ring 1 are made of 940 stainless steel. The 940 steel has undergone special heat treatment, and its hardness can reach HRC50, which meets flight requirements and meets the life index of nearly 10,000 swings under heavy load conditions, and reaches temperature shock (-70 ℃450℃) test and salt spray test. The silicon nitride (Si3N4) rolling element 3 cooperates with the 940 stainless steel bearing inner ring 2 and the bearing outer ring 1, the friction coefficient is small, self-lubrication is real...

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Abstract

The present invention relates to angular contact bearing, and is one self-lubricating angular contact ball bearing for application in high temperature, heavy load and corrosive condition. The bearing includes rolling body, inner bearing ring and outer bearing ring, the rolling body is made of silicon nitride ceramic balls, and the inner bearing ring and the outer bearing ring are made of stainless steel. The rolling body is fully filled with balls with contact angle greater than 36 deg, and double-side dust cap is mounted between the inner bearing ring and the outer bearing ring. The present invention is self-lubricated, has high hardness, no holder and good dust preventing performance. The present invention is used mainly in butterfly valve of absolute pressure regulator in aeronautic and astronautic fields, and may be also used in field with corrosive medium, such as in chemical industry, navigation, etc.

Description

technical field [0001] The invention relates to an angular contact bearing, in particular to an angular contact ball bearing used under the conditions of high temperature, heavy load and corrosion resistance. The invention is mainly used in butterfly valves of aviation and aerospace absolute pressure regulators, and can also be used in mediums with strong corrosion resistance, such as chemical industry, navigation and other fields. Background technique [0002] The existing high-temperature, heavy-duty, corrosion-resistant angular contact ball bearings use stainless steel as the material of the inner and outer rings of the bearing. The rolling elements are generally made of stainless steel, with cages, and the contact angle is small. The distance between the rolling elements and the inner and outer rings of the bearing needs Add lubricating grease; there are also mixed ceramic (Si3N4) ball bearings for the rolling elements, which do not need to add lubricating grease. For t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16C33/32F16C33/58
Inventor 陈有光潘建明丁春英张培志王东辉
Owner 上海市轴承技术研究所有限公司
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