大型タンカーのポンプ室用油圧エレベーターについて

抄録

With the recent tendency toward large sized tankers, the increased height of the cargo pump room on such tankers, sometimes close upon 30 meters or more, has compelled the crew to spend much labour for going up and down themselves or carrying machinery parts, and has consequently aroused the demands for the provision of an elevator in the pump room. The compartment, however, is a gas-dangerous space where the existing electric elevator as used in engine rooms cannot be applied as it is, and the fact has delayed the development of practical elevators for the pump room. Under such circumstances, an electric elevator of which hoisting machine and electric control equipment are installed in an isolated gastight room and remote-controlled from the cage by pulling wire ropes, has been developed. However even this type of elevator has still many problems such as the limitation of arrangement unreliability in control, gastightness at the penetration part of wire ropes, etc. For solving those problems, the authors have developed an oil hydraulic elevator for cargo pump room, which is driven by oil hydraulic power and controlled by a combined hydraulic and pneumatic system, and succeeded to achieve a good result on an 300,000 DWT tanker. This paper introduces the summary.