Propeller hub

Abstract

The invention relates to a propeller hub, which comprises an oil cylinder body, a hub, a piston, a blade disc root, a sliding block, a guide frame, blade root bolts and a screw shaft provided with inner and outer oil pipes, wherein the oil cylinder body is connected with the hub; the piston is positioned in the oil cylinder body; the outer wall of the guide frame is in sliding connection with theinner edge of the central hole of the hub; and the hub is connected with the screw shaft through a flange blot. The propeller hub is characterized in that: the piston is arranged on the end of the guide frame inside the hub by a bolt; a chamber between the front end of the piston and the inner wall of the oil cylinder body is a front chamber; a chamber enclosed by the piston, the inner cavity of the guide frame and the end part of the screw shaft inserted into the inner cavity of the guide frame is a rear chamber; the sliding block is arranged in a chute arranged on the outer wall of the guide frame; the root part of the blade disk root is provided with a pin which is inserted into the sliding block and is in movable connection with the sliding block; the outer oil pipe in the screw shaftis communicated with the rear chamber; the inner oil pipe passes through the rear chamber and the piston to be communicated with the front chamber; and the blade disc root is provided with blade rootblots for fixing blade roots, the front ends of the blade root bolts incline toward blade axes, and the elongation lines of the front ends of the blade root bolts form 5 to 15 degree angle with the blade axes.

Description

technical field [0001] The invention relates to a ship propulsion propeller, in particular to a ship propeller hub which can be applied to main propulsion, side thrust and full rotation. Background technique [0002] The propeller hub is a key part of the propeller ship propulsion system. Once something goes wrong, it will cause huge losses to the ship. In the structure of the existing propeller hub, the blade root screws that fix the blade root are generally perpendicular to the blade axis. This structure The torque transmission is small, and often requires multiple blade root screws (7 in general, 4 on the blade surface, and 3 on the blade back) to withstand the huge torque and bending moment formed on the blade root during work. Too many blade screws Root screws are not only inconvenient to install, but also form too many mounting holes in the blade root of the blade, which affects the mechanical strength of the blade root. [0003] After the existing guide frame is conn...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a new screw for the current propeller hub in view of a series of problems such as small structural torsion transmission, large number of uses, inconvenient installation, and large difference in the force bearing area on the left and right sides of the piston. propeller hub

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