| 摘要 |
A sealing assembly provides for rotatably coupling a rotary drum and a pipe at a trunnion on the drum that has a generally circular opening configured to rotate about the pipe. The sealing assembly includes a housing with a chamber configured to contain a pressurizable fluid. The housing is configured to be coupled to adjustment screws extending through a mounting plate on the pipe. The sealing assembly also includes a seal with a bearing surface coupled to a driven portion. The bearing surface generally defines a circular shape corresponding to the trunnion opening. The seal is coupled to the housing with the driven portion of the seal responsive to fluid pressure in the housing chamber. The seal is configured to be biased by the fluid, when pressurized, against the trunnion opening. The bearing surface is disposed at an oblique angle with respect to the plane of the trunnion opening. The trunnion includes an outer annular surface that is substantially in the plane defined by the trunnion opening, and the outer annular surface adjoins at a corner an inner cylindrical surface of the trunnion. The bearing surface of the seal substantially contacts only the corner of the trunnion opening.
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