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Sealing device

A technology of sealing device and sealing lip, which is applied in the directions of engine sealing, bearing assembly, transportation and packaging, etc., which can solve the problems such as the bad influence of the sealing lip sealing device, the effect of not showing the effect of reducing the rotational torque, etc., and achieve low fuel consumption The effect of realizing long life and realizing the heating temperature

Active Publication Date: 2010-03-03
UCHIYAMA MFG
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] However, depending on the degree of roughening of the sliding contact surface, the friction of the seal lip may be promoted or the sealing performance of the sealing device may be adversely affected.
In addition, it is also known that there are cases where the reduction effect of the rotation torque is not exhibited

Method used

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Examples

Experimental program
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Effect test

experiment example

[0080] The metal material of SUS430 was used to prepare the hanging rings which form sample A - sample H.

[0081] Sample A is a suspension ring formed by rolling a steel plate, and is a sample without surface processing. Sample B is a sample obtained by cutting the metal material described above to form a suspension ring. Sample C is a sample in which a suspending ring is formed of the above-mentioned metal material, and the sliding contact surface with the seal lip is subjected to surface processing by the above-mentioned concave-convex transfer processing. Samples D to H are samples in which the surface of the sliding contact surface with the seal lip was subjected to surface processing by shot peening. The shot peening treatment of sample D to sample H is performed by spraying and colliding tiny rigid particles of steel balls with a diameter of 40 to 200 μm at a jet velocity of 100 m / sec or more as described above. The tiny rigid particles on the surface are removed and ...

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PUM

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Abstract

A sealing device for sealing space between two members concentrically and relatively rotating comprising a core member fixedly fitted into one of the two members, a metal slinger fixedly fitted into the other of the two members, and an elastic seal member fixedly attached to the core member and having a seal lip which elastically and slidably contacts the slinger. The slinger has a slidably contacting treated surface for the seal lip as is processed such a surface-treatment as defined by the following parameters: arithmetic mean roughness Ra in the range from 0.5 [mu]m to 1.5 [mu]m, root-mean-square roughness Rq in the range from 0.6 [mu]m to 2.0 [mu]m, mean surface irregularity interval Sm in the range from 0.05 mm to 0.17 mm and peak count Pc (50%) in the range from 20 to 60.

Description

technical field [0001] The present invention relates to a core bone that is fitted and fixed on one of two parts that rotate relatively concentrically, a metal lifting ring that is fitted and fixed on the other part, and a sealing lip that is provided with elastic sliding contact on the lifting ring and is fixed. The elastic sealing parts on the above-mentioned mandrel form, and they are combined to form a sealing device for sealing between the above-mentioned two parts. Background technique [0002] Conventionally, there is known a sealing device interposed between a fixed-side member such as a bearing unit of a wheel suspension portion of a vehicle and a rotating-side member to prevent the intrusion of water and dust. Recently, various measures have been taken to achieve lower fuel consumption of vehicles, and reduction in rotational torque is required also in the bearing unit portion. The sealing lip is arranged so that it elastically slides on the lifting ring fitted an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16J15/32F16C33/78F16C41/00F16J15/3232F16J15/328
CPCF16C41/007F16C2326/02F16J15/324F16J15/326F16J15/3264F16C33/7883F16C19/186
Inventor 石田浩规
Owner UCHIYAMA MFG
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