Roller bit dumbbell type sealing structure
A technology of roller cone bit and sealing structure, which is applied in the direction of drill bit, drilling equipment, earthwork drilling and production, etc. It can solve problems such as sealing failure, achieve the effects of reducing friction, improving sealing reliability, and increasing contact area
Inactive Publication Date: 2019-07-09
SOUTHWEST PETROLEUM UNIV
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Problems solved by technology
[0004] The purpose of the present invention is to design a metal seal structure that can slow down the friction and aging of the rubber ring and prolong the service life of the bearing in order to overcome the problem that the existing metal seal device is prone to seal failure in the harsh working conditions of the mine
Method used
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Embodiment Construction
[0012] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.
[0013] Depend on Figure 1 ~ Figure 2 As shown, the dumbbell-type sealing structure of the cone bit is mainly composed of a dynamic seal ring 10, a static seal ring 8, a dumbbell-shaped rubber seal ring 9, a cone 1 and a tooth palm journal 12, wherein: the dynamic seal ring 10 is located The inner hole 11 of the cone and the groove of the tooth palm journal 12 where the static seal ring 8 is located form a seal cavity, and the metal seal structure 6 composed of the dynamic seal ring 10, the static seal ring 8 and the dumbbell-shaped rubber seal ring 9 is put into the seal chamber. In the cavity, the dynamic sealing ring 10 is in interference fit with the cone inner hole 11, the static sealing ring 8 is in interference fit with the tooth palm journal 12 groove, the dynamic sealing ring 10 rotates with the cone 1, and the dumbbell-shaped rubber s...
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The invention relates to a roller bit dumbbell-type sealing structure which is widely applied to the field of mines and drilling. The roller bit dumbbell-type sealing structure has the characteristicsof being simple and compact in structure, small in occupied space and the like and is mainly composed of a dynamic sealing ring, a static sealing ring, a dumbbell-type rubber sealing ring, a roller cone and a tooth palm shaft neck. According to the technical scheme of the roller bit dumbbell-type sealing structure, a roller cone inner hole where the dynamic sealing ring is located and a tooth palm shaft neck groove where the static sealing ring is located constitute a sealed cavity; a metal sealing device constituted by the dynamic sealing ring, the static sealing ring and the dumbbell-type rubber sealing ring is put into the sealed cavity; the dynamic sealing ring and the roller cone inner hole are in interference fit; the static sealing ring and the tooth palm shaft neck groove are in interference fit; the dynamic sealing ring rotates along with the roller cone; and the dumbbell-type rubber sealing ring is compressed between the dynamic sealing ring and the static sealing ring. Themetal sealing structure is improved, the sealing reliability is improved, and abrasion resistance and high-temperature-resisting performance are improved.
Description
technical field [0001] The invention relates to a metal sealing structure, in particular to a roller bit dumbbell-type sealing structure used in the rotary dynamic sealing of downhole power tools in the field of mines and drilling. Background technique [0002] As a rotary dynamic seal commonly used in downhole power tools, metal seals have the characteristics of simple structure, compactness and small footprint, and can work at high speeds, so they are widely used in mines and drilling fields. Lubricating oil leaks, preventing external mud from entering the inside of the bearing. The metal seal structure currently used is composed of O-shaped rubber ring, dynamic seal ring, static seal ring, cone and tooth palm journal. The metal sealing structure will not only be subjected to the elastic force of the O-ring, but also the pressure load of the inner lubricating oil and the outer drilling mud. The early failure is serious, and the service life of the bearing is short, result...
Claims
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IPC IPC(8): E21B10/25E21B10/24
CPCE21B10/24E21B10/25
Inventor 张杰胡洋张瀚谢经轩
Owner SOUTHWEST PETROLEUM UNIV