公开(公告)号：WO2017085356A1

公开(公告)日：2017-05-26

申请号：PCT/FI2015/050808

申请日：2015-11-20

Applicant: ROLLS-ROYCE OY AB

Inventor： RAMSTEDT, Karl Emil Arvid ,  WIHLMAN, Ilkka Erik

IPC: B63H5/125 ,  B63H20/04

CPC classification number: B63H5/125 ,  B63B2211/06 ,  B63H1/14 ,  B63H5/15 ,  B63H25/42 ,  B63H2005/1254 ,  B63H2025/425

Abstract: A retractable thruster for a swimming vessel, wherein the retractable thruster comprises a propeller and a lifting and lowering arrangement. The lifting and lowering arrangement is configured to vertically move the propeller between a retracted position and an ejected posi- tion. In the retracted position the pro- peller is substantially inside a bottom well of the swimming vessel and in the ejected position the propeller is sub- stantially outside the bottom well. The retractable thruster comprises a water- permeable protective element configured to be located inside the bottom well above the propeller and configured to vertically move with the propeller. In the ejected position the water-permeable protective element is configured to sub- stantially prevent loose ice from drift- ing inside the bottom well through the water-permeable protective element and when the propeller is moved from the re- tracted position to the ejected position, the water-permeable protective element is configured to push ice out of the bottom well. (Fig. 1A)

Abstract translation: 一种用于游泳船的可伸缩推进器，其中所述可伸缩推进器包括推进器和升降装置。 升降装置构造成使螺旋桨在缩回位置和弹出位置之间垂直移动。 在缩回位置，螺旋桨大体上位于游泳船的底部井中，并且在推出位置螺旋桨基本上位于底部井的外部。 可收缩式推进器包括渗水保护元件，该保护元件构造成位于螺旋桨上方的底部井的内部并且构造成与螺旋桨一起竖直移动。 在弹出位置，透水保护元件构造成大致防止松散的冰块通过透水保护元件漂浮在底部井中，并且当螺旋桨从撤回位置移动到弹出位置时 ，透水保护元件构造成将冰块推出底部井。 （图1A）