| 摘要 |
<p>A harsh environment swivel is disclosed. The swivel is of the type having first and second swivel heads 2,3 located at opposite ends of a generally hollow swivel body 4. A swivel shaft 6 is attached to the first swivel head 2 and secured within the hollow body 4 by a locking nut 8. The swivel shaft 6 rotates about tapered roller bearings 12,16 which transmit tensile loading from the swivel shaft 6 to the hollow body 4. A plurality of progressively more restrictive seals 17 restrict the passage of debris into the interior of the hollow body. In a further embodiment, a swivel having independently rotating swivel heads 33,34 at either end is disclosed. A method of flushing debris from the interior of a swivel is also disclosed. <IMAGE></p> |
