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A W-shaped sealing structure of a roller cone bit bearing

A technology of sealing structure and roller cone bit, which is applied in construction and other directions, can solve the problems of large contact area, large friction force, high temperature, etc., and achieve the effect of small contact area, good sealing performance and reduced failure

Active Publication Date: 2017-11-28
SOUTHWEST PETROLEUM UNIV
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem of large contact area of ​​the O-shaped rubber ring in the existing sealing structure of the roller cone bit bearing, resulting in large friction force and high temperature, and specially provides a W-shaped sealing structure of the roller cone bit bearing

Method used

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  • A W-shaped sealing structure of a roller cone bit bearing
  • A W-shaped sealing structure of a roller cone bit bearing

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Embodiment Construction

[0010] The present invention will be further described below in conjunction with accompanying drawing and embodiment;

[0011] Such as figure 1 As shown, a roller cone bit bearing W-shaped sealing structure is composed of a roller cone (2), a bearing (5), and a W-shaped sealing ring (6). The W-shaped sealing ring (6) is installed in the sealing chamber between the bearing (5) and the inner hole of the cone (2).

[0012] Such as figure 2 As shown, the W-shaped sealing ring (6) has two protrusions and one groove on the side close to the bearing (5), and there are three protrusions and two grooves on the side close to the inner hole of the cone (2); The shapes of the protrusions and grooves are arc-shaped, and the protrusions and grooves are evenly and alternately distributed in the axial direction. Through compression, the axial and radial seals are realized; the other sides of the W-shaped sealing ring are oblique lines.

[0013] With reference figure 1 , when this seal is...

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Abstract

The invention relates to a W-shaped sealing structure of a roller cone bit bearing, which is composed of a roller cone, a bearing and a W-shaped sealing ring. The W-shaped sealing ring has two protrusions and one groove on the side close to the bearing, and the W-shaped sealing ring has three protrusions and two grooves on the side close to the inner hole of the cone; the protrusions and grooves are arcs The protrusions and grooves are evenly and alternately distributed in the axial direction, and the axial and radial seals are realized through compression; the other sides of the W-shaped sealing ring are oblique lines. The W-shaped sealing structure reduces the contact area of ​​the sealing ring, reduces frictional heat, lowers the sealing temperature, and improves the service life of the sealing ring; the cross design of multiple protrusions realizes multi-stage sealing, which saves the cost of the drill bit The precious space improves the reliability of the seal; the W-shaped seal structure has a good self-sealing effect. Under pressure, the protrusion and the sealing surface cooperate more closely, and the sealing performance is better; when the groove has a certain volume, Grease can be stored and has good lubricating performance.

Description

technical field [0001] The invention relates to a W-shaped sealing structure of a roller cone bit bearing which is suitable for oil drilling and geological drilling, and belongs to the field of roller bit bearing sealing. Background technique [0002] One of the key factors affecting the service life of the roller cone bit is the quality of the bearing sealing performance. In roller cone bit drilling, the working temperature of the seal is very high due to the geothermal heat at the bottom of the well, the frictional heat between the cone and the bearing, and the heat generated by the rock crushed by the cone. In addition, the friction and wear between the sealing element and the bearing is aggravated, which makes the aging and failure of the rubber ring more serious. serious. The most critical factor in determining the rubber ring is temperature. High temperature will cause the rubber ring to age, the material will become hard and brittle, and the sealing effect will be lo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B10/25
Inventor 周已王林黄志强张富晓李刚张文琳张浩辰徐果晏瑀琪
Owner SOUTHWEST PETROLEUM UNIV
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