| 摘要 |
For effecting control from one side of a wall of a member on the other side thereof, such as through the pressure hull of a submarine, an arrangement is provided wherein a rotary shaft passes through a bore in the wall and a separate housing mounted on the high pressure side about the axis of the bore, such that driver and driven members can be coupled to the ends of the shaft. The housing is formed with a cavity, and the shaft comprises first and second shaft elements axially separable but rotatably coupled with each other. The second shaft element extends from the housing cavity away from the wall and has a shoulder in the housing cavity facing toward the wall, and bearing rotatably against a thrust bearing disposed in the housing between the wall and the shoulder. The housing and the wall bore are sealed so as to be fluid tight. The housing, which comprises a housing body and a removable cap, is coupled to the high pressure side of the wall, such as by threaded rods, bolts, etc. The arrangement permits the opening in the wall to take the form of a simple smooth bore, with the necessary machining of shoulders and other arrangements for ensuring sealing and resisting pressure being done on the separate housing. The arrangement also limits the transmission of nonrotative stresses from the second shaft element on the high pressure side to the first shaft element, which extends into the low pressure area. The arrangement also facilitates repair after damage.
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