| 摘要 |
PURPOSE:To have a small-sized refueling device by excavating a through hold in the center of the vertical shaft for driving propeller and by forming two refueling passages. CONSTITUTION:A through hole 18b is excavated in the center of vertical shaft 18, and in this hole 18b an oil-hydraulically refueling pipe 28 for changing the joint in a double construction is inserted rotatably and vertical movably. To the top of this pipe 28 a refueling cylinder 35 with rotary seal is connected so as to admit rotation of the pipe 28 while feeding and taking back the pressure oil to/form the pipe, and an oil-hydraulic cylinder 23 for changing the joint is supplied with fuel by this refueling cylinder 35 and the pipe 28. Accordingly the refueling cylinder 35 with rotary seal can be made in a small size as well as designing of the same carried through without restriction by dimensions and location of the revolving cylinder part. Thus there are no difficulties in designing as well as works for maintenance and inspection will by much facilitated. |
