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Insulated rolling bearing

A technology of rolling bearings and rolling elements, which is applied in the direction of ball bearings, shafts, bearings, bearing components, etc., can solve the problems of reduced reliability of refrigerant compressors, and achieve the effects of miniaturization, prevention of relative rotation, and prevention of vibration

Pending Publication Date: 2022-05-17
NTN CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This current causes the inner ring of the rolling bearing, the two raceways of the outer ring and the rolling surface of the rolling element to undergo corrosion called galvanic corrosion, which reduces the reliability of the refrigerant compressor.

Method used

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  • Insulated rolling bearing
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Examples

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Embodiment Construction

[0038] based on figure 1 A refrigerant compressor including the insulating rolling bearing of the present invention will be described. figure 1 is a sectional view of the refrigerant compressor. in addition, figure 1 In the above, as the refrigerant compressor, a volumetric scroll compressor is shown, but the refrigerant compressor to which the insulating rolling bearing of the present invention is applied is not limited to the scroll type, and can also be applied to the rotary type, reciprocating type, and screw type. Volumetric compressors such as other compression methods. In addition, both horizontal refrigerant compressors and vertical refrigerant compressors can be applied.

[0039] Such as figure 1 As shown, the compressor 1 is composed of a fixed scroll 2 , a center housing 3 and a motor housing 4 to form a housing. An iron shaft 5 serving as a rotating shaft is rotatably supported on the center housing 3 and the motor housing 4 via a main bearing 18 and a sub bea...

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Abstract

Provided is an insulated rolling bearing capable of preventing electrolytic corrosion and capable of preventing the generation of a gap between a shaft and a raceway ring. A sub-bearing (21) is provided with an inner ring (22) and an outer ring (23), a plurality of balls (24) interposed between the inner ring and the outer ring, and an insulating bush (28) fitted to the inner peripheral portion of the inner ring (22), the insulating bush (28) having a substantially cylindrical metal base material (28a) and a resin layer (28b) formed on the inner peripheral surface of the metal base material (28a), and the metal base material (28a) side and the inner peripheral portion of the inner ring (22) being brought into contact and fitted.

Description

technical field [0001] The invention relates to an insulating rolling bearing, in particular to an insulating rolling bearing used in a refrigerant compressor. Background technique [0002] Volumetric refrigerant compressors are widely used in various fields as compressors for refrigeration and air conditioning equipment. In recent years, interest in reduction of energy has increased, and improvement in efficiency has been demanded in various industries. Especially in air conditioners that are in close contact with the living environment, due to the high degree of public opinion, it is required to develop reliable products that can achieve lower costs and higher efficiency, and use inverters to drive variable-speed operation of motors Increased, compared with the conventional fixed-speed refrigerant compressor, it is developing higher efficiency. [0003] In the refrigerant compressor using the above-mentioned inverter, the drive current (input current from the inverter to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16C35/073F16C33/58F04C18/02F16C19/06F04C29/00
CPCF16C35/073F16C33/58F04C18/02F16C19/06F04C29/00F16C33/586F16C19/52F16C35/077F04C2240/50
Inventor 福泽觉下田正人
Owner NTN CORP