Ducted propeller for ship - has pipe driven via duct-encircling toothed wheel and bearings carrying duct ends housed in pipes in bearing block

摘要

The ducted ship's propeller with suction- and pressure-pipes is driven by a toothed wheel encircling a duct-length running in two ball-bearings carried in a bearing block. The blades are fixed to the inside of this length, and to one another at its centre. The bearing inner races fit around the duct ends. The outer races are housed in enlarged end-portions of the suction- and pressure-pipe respectively. These portions are axially and radially fixed in the bearing block which extends around half the periphery, with a semicircular recess for the toothed wheel.