1.前言油轮的抽吸系统与营运的经济性有密切的关系。近年来,以油轮的巨型化和陆用设备的引入为背景,使貨油泵显著地趋向大型化,其容量与油轮的大型化成此例地增大。另一方面,尽管船巨型化了,但因安装貨油泵的泵室需要佈置在靠近船尾处,因此在结构上受到一定的限制,若要成比例地扩大泵室的占地空间,仍是困难的,所以要求泵必须相对小型化。使泵小型化,只用提高转速的方法也能达到,佈置上的问題也能解决,但是,这样会使泵的 1. Introduction Tanker suction systems are closely related to the economics of operation. In recent years, with the huge oil tanker and the introduction of land-based equipment as background, cargo oil pumps have become significantly larger in size and larger in capacity and tankers. On the other hand, although the size of the ship is huge, since the pump room where the cargo pump is installed needs to be arranged close to the stern, it is structurally limited, and it is still difficult to expand the space occupied by the pump room proportionally Therefore, the pump must be relatively small. Pump miniaturization, only by increasing the speed of the method can also be achieved, the layout of the problem can be solved, but this will make the pump