Variable-pitch propeller for ship

Abstract

The invention relates to a propeller for a ship and discloses a variable-pitch propeller for a ship. The variable-pitch propeller comprises a ship shaft, a push-pull rod, racks, a propeller hub, a compensation duct, O-shaped sealing rings, first glands, second glands, blades, partial gears and shaft end retaining rings. When the propeller operates, the ship shaft drives the blades to rotate in the rotating direction of the propeller; a hydraulic variable-pitch piston in a ship power cabin drives the push-pull rod to move in the axial direction of the ship shaft, so that the racks move in the moving direction of the push-pull rod; and each rack is matched with the corresponding partial gears mutually to drive the blades to rotate around the root axes of the blades, so that the pitch angle and the pitch of the propeller are changed, accordingly the thrust of the propeller is changed. By changing the rotating direction of the blades, the direction of the pitch angle can be changed, and accordingly the thrust direction of the propeller is changed.

Description

technical field [0001] The invention relates to a variable-pitch marine propeller, which relates to a marine propeller, in particular to a variable-pitch marine propeller which adopts a compensation conduit at the front end of the root of the blade to guide water flow, adopts a pitch-variable mechanism inside a rack and pinion hub, and adopts a spherical seal at the root of the blade. Propeller from boat. Background technique [0002] There are many types of marine propellers. The common civil ship propellers mainly include ordinary propellers (or fixed-pitch propellers), ducted propellers (also called duct propellers, referred to as ducted propellers), and adjustable pitch propellers. [0003] Adjustable pitch propellers are also called variable pitch propellers, or variable pitch propellers for short. The adjustable pitch propeller can drive the blade to rotate around the axis of the blade root through the pitch variable mechanism in the hub under the condition that the s...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the problems that the root of the blade of the ordinary adjustable pitch propeller is prone to cavitation, the eccentric pin and the pitch change mechanism in the slider hub are prone to failure due to wear, and the sealing performance between the blade root bearing disc and the hub is poor. Disadvantages, provide a kind of compensation conduit at the front end of the root of the blade to guide the water flow, a pitch change mechanism in the rack and pinion hub, and a spherical seal at the root of the blade, which is not easy to cause cavitation at the root of the blade, and the pitch change mechanism in the hub is not easy A variable-pitch marine propeller with good wear and blade root sealing performance

Images