| 摘要 |
1,220,834. Constant tension winch control. HELSINBORGS VARFS A.B. 14 May, 1968 [23 May, 1967], No. 22840/68. Heading B8B. A mooring winch has its drive automatically controlled to maintain a preset tension in a mooring rope 11 by a moment balance mechanism comprising a planetary gear 4, 5, 12 which forms part of the drive to the winch drum and causes deflections of a spring balance 18, which in turn controls the power supply to the winch motor 1. A gear-wheel 8 fixed to the drum shaft 9 is driven by a gear-wheel 7 mounting a frame 6 for planet gears 5, the latter engaging both a sun-wheel 4 secured to the crank-shaft of the drive motor 1, and an annular gear 12. The latter is pivotally mounted on links 13, 14 which when the gear 12 rotatably deflects in proportion to the moment differential between the drive motor 1 and the tension in the rope 11, transmit this deflection through links 16, 17 to the balance 18. A cable 29 for transmitting deflection in the spring balance 18 to a control valve 2 of the motor 1, operates through a linkage 31, which is adjustable relative to the valve 2 to permit a setting corresponding to any desired tension in the rope 11. A lever 32 is provided in association with the linkage 31 to permit manual control of the winch motor which may be steam, hydraulic or electrically powered. |
