发明名称 |
TETNINGSRING |
摘要 |
A sliding seal ring for a drill bit comprising at least one cutter rotatably mounted on a journal forming part of the drill bit body. The seal ring is made of elastic metallic strip material and is of spiral configuration with the spirals in overlapping relation. The seal ring is mounted under axial tension between the pocket in an edge ring and the drill bit body and rotates with the cutter. In one form of the invention, the spirals are in abutting relation to provide a complete seal. In another form the spirals are open to define gaps permitting flow of flushing liquid to cool and lubricate the bearings supporting the cutter on the trunnion. |
申请公布号 |
SE7812691(A) |
申请公布日期 |
1979.06.22 |
申请号 |
SE19780012691 |
申请日期 |
1978.12.11 |
申请人 |
* SKF KUGELLAGERFABRIKEN GMBH |
发明人 |
A * OLSCHEWSKI;H * KUNKEL;M * BRANDENSTEIN;L * WALTER |
分类号 |
E21B10/22;E21B10/25;F16J15/34;(IPC1-7):F16J15/28 |
主分类号 |
E21B10/22 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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