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Sealing device

A sealing device and sealing lip technology, applied in the directions of engine sealing, transportation and packaging, bearings, etc., can solve problems such as deterioration of sealing performance and promotion of sliding wear of sealing lip 51

Inactive Publication Date: 2018-07-17
NOK CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, when the unevenness 54 is provided on the lip sliding contact surface 53 in this way, since the sealing lip 51 made of a rubber-like elastic body slides against the unevenness 54, the sliding wear of the sealing lip 51 is promoted, which may lead to deterioration of the sealing performance. The problem

Method used

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Experimental program
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Embodiment

[0055] Embodiments of the present invention will be described below with reference to the drawings.

[0056] figure 1 A main part cross section of the sealing device according to the embodiment of the present invention is shown.

[0057] figure 1 The sealing device is used as a bearing lubricating oil seal in the automotive related field, and is composed of an oil flinger 11 and a sealing lip part 21, wherein the oil flinger 11 is installed on the inner ring of the bearing (not shown), and is connected with the inner ring of the bearing. The ring rotates at the same time, and the seal lip member 21 is attached to a bearing outer ring (not shown), and is slidably in close contact with the oil flinger 11a. Furthermore, as an invention, the bearing inner ring may be replaced by a shaft, sleeve, etc. of a rotary machine, and the bearing outer ring may be replaced by a housing of a rotary machine, etc.

[0058] The flinger 11 is made of a metal material, and a flange portion (...

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PUM

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Abstract

The invention provides a sealing device which has a sealing lip that tightly contacts the other member so as to be able to slide freely, and in which the reduction of friction that accompanies the sliding can be achieved, and lip abrasion can be suppressed. The sealing device having the sealing lip that tightly contacts the other member so as to be able to slide freely is characterized in that unevenness is added to a sliding surface of the sealing lip and grease with low base oil viscosity is supplied on the sliding surface of the sealing lip, for simultaneously achieving a smaller frictionalforce during sliding and suppressed lip abrasion. The unevenness has a size of 1.0 to 3.0 [mu]mRa and the grease with low base oil viscosity is preferably grease having dynamic base oil viscosity of10 to 40 mm / s at 40 DEG C.

Description

[0001] This application is a divisional application with the application number 201280013437.8 submitted on January 19, 2012, and the title of the invention is "sealing device". technical field [0002] The present invention relates to a sealing device, and more specifically relates to a sealing device having a sealing lip which is slidably and tightly connected to a matching component. The sealing device of the present invention can be used, for example, as a bearing lubricating oil seal in the field of automobiles. Background technique [0003] For example, in a bearing unit of an automobile, a sealing device (hereinafter also referred to as a “seal”) is used for the purpose of preventing muddy water from entering from the outside and sealing bearing lubricating oil. [0004] In recent years, as a measure to improve the fuel efficiency of automobiles, low friction (low torque) has been sought in the target seal, and the following countermeasures have been proposed: for exa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16J15/324F16J15/3264F16C33/78C10M171/02C10N20/02C10N30/06C10N40/02C10N50/10F16J15/3232F16J15/3256
CPCC10M171/02C10N2020/02C10N2030/06C10N2040/02C10N2050/10F16C33/7823F16C33/7883F16C2240/54F16C2326/20F16J15/324F16J15/3264
Inventor 渡部光雄铃木望神前刚加藤拓也
Owner NOK CORP