Roller bit two-way gear sealing structure

Abstract

The invention relates to a roller bit two-way gear sealing structure which comprises a cone, a bearing and a two-way gear sealing ring. A body of the two-way gear sealing ring is an annular sealing ring. A plurality of teeth identical in size are evenly distributed on the inner side and the outer side of the body. The two side faces of the teeth are both in an involute tooth shape, the top faces of the teeth are in an arc shape, and the teeth on the inner side and the teeth on the outer side are distributed in a staggered mode. Multi-stage sealing is achieved through the teeth, and when a certain tooth loses efficacy, other teeth can still achieve effective sealing. The two-way gear sealing ring rotates to drive lubricating grease to circulate, all the teeth can be well lubricated, and hydrodynamic sealing can be achieved easily. Meanwhile, the lubricating grease can be stored in multiple tooth grooves, and sealing lubricating performance is improved. The teeth on the inner side and the teeth on the outer side are distributed in the staggered mode, so that the situation that after the teeth on one side are damaged, the teeth on the other side are affected is prevented. The annular sealing ring of the body has certain thickness and certain height, effective strength and sealing performance are guaranteed, and the situation that work of the whole sealing ring is affected because the certain tooth is damaged is effectively prevented.

Description

technical field [0001] The invention relates to a bidirectional gear sealing structure of a roller cone bit, which is suitable for oil drilling and geological exploration, and belongs to the field of bearing sealing of the roller cone bit. Background technique [0002] The roller cone bit is the most widely used drilling tool in oil drilling and geological drilling. The roller cone bit has the functions of impacting, crushing and shearing the formation rock when it rotates, so the roller cone bit can adapt to various soft, medium and hard formations. Sealing is the most critical factor in determining the life of a roller cone bit, and it is also the most prone to failure. Metal floating seals have appeared in recent years. Although the metal ring has better high temperature resistance, the deformation of the metal ring after wear cannot be automatically compensated and cannot play an effective sealing role. The metal floating seal also uses O-shaped rubber rings, but The c...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problems of large contact area, large frictional force and frictional heat, and poor single-stage sealing performance of the existing roller cone bit sealing structure, and to provide a two-way gear sealing structure of the roller cone bit.

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