Novel roller bit sealing ring
A technology of roller cone bit and sealing ring, applied in the field of bearing sealing, can solve the problems of large frictional resistance, aging and wear, and achieve the effect of reducing wear and tear
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Embodiment 1
[0029] Such as Figure 1 to Figure 3 As shown, a new type of cone bit sealing ring is arranged in the sealing groove 3 between the cone shaft hole 1 and the cone shaft journal 2, and both ends of the sealing groove are respectively connected with the internal lubricating oil channel 4 and the external drilling fluid The channel 5 includes a metal skeleton 6 fixed in the sealing groove 3, and the metal skeleton 6 separates the sealing groove 3 into a lubricating oil sealing groove communicating with the internal lubricating oil channel 4 and drilling fluid communicating with the external drilling fluid channel 5 Sealing groove, the lubricating oil sealing groove is provided with a lubricating oil seal, which together with the metal skeleton 6 completely seals and isolates the internal lubricating oil passage 4, and the drilling fluid sealing groove is provided with a drilling fluid seal which is The metal framework 6 completely seals and isolates the external drilling fluid chann...
Embodiment 2
[0031] Such as Figure 4 As shown, in this embodiment, when the lubricating oil pressure is less than 1 MPa, the structure can be adjusted appropriately. The lubricating oil seal is composed of a radial dynamic seal 14 that dynamically seals the axial surface of the tooth palm journal 2 and It is composed of a fixed part fixed with the metal frame 6. The fixed part is composed of a metal fixing part 15 and a rubber gasket 16. The metal fixing part 15 is crimped by the metal frame 6 to press the radial movable seal 14 and the metal frame 6 is crimped At this time, the force is transmitted to the rubber gasket 16 through the metal fixed part 15 and the radial dynamic seal 14 to cause compression, which can seal the lubricating oil leaking between the metal fixed part 15 and the rubber gasket 16. The radial dynamic seal 14 is made of filled polytetrafluoroethylene. Similarly, the dynamic seal contact surface of the seal is provided with first and second spiral grooves 9, 12 respect...
Embodiment 3
[0033] Such as Figure 5 As shown, in this embodiment, when the lubricating oil pressure is less than 1 MPa, the structure can be adjusted appropriately. The lubricating oil seal is a conventional high-pressure rubber oil seal 17 made of rubber, and the others are the same as in embodiment 1. . The high pressure rubber oil seal 17 is a high pressure resistant oil seal structure, which has been widely used in other fields. The purpose mentioned here is to show that all combined sealing methods that adopt the principle of hydrodynamic sealing inside and outside and are similar to the present invention should be protected by patents.
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