Integral structure type propeller hub for ship

Abstract

The invention discloses an integral structure type propeller hub for a ship. The integral structure type propeller hub mainly comprises hub body, a guide frame, a sliding block, a paddle base and a paddle shaft, wherein the hub body is integrated with an oil cylinder body into a whole, and the front end of the hub body is connected with the paddle shaft through a high-strength flange bolt; the hub body is internally provided with the movable guide frame which is integrated with a piston into a whole, the front end of the guide frame serves as an oil cylinder of one oil cavity, the rear end of the guide frame serves as a piston of the other oil cavity, and the inner diameter of the front end of the guide frame is equal to the outer diameter of the rear end of the guide frame so that consistent oil pressure is ensured for ahead and stern operation; the paddle shaft is arranged into the front end of the guide frame, the rear end of the guide frame, the rear end of the guide frame is arranged into the rear part of the hub body, a sliding chute for the arrangement of the sliding block is arranged on an outer wall in the middle of the guide frame, and the sliding block is sleeved on a crank pin arranged at a disc root part of the paddle base; and the sliding block is movably connected with the crank pin and the sliding chute. The integral structure type propeller hub has the characteristics of higher strength and rigidity, convenience for integral processing, better coaxiality, better stability and reliability in operation, good sealing property and the like.

Description

technical field [0001] The invention relates to a ship propeller hub with an integral structure that can be used for ship main propulsion, side thrust and full-turn propellers, and belongs to the technical field of ship propeller controllable pitch propellers. Background technique [0002] The propeller hub is one of the core components of the controllable pitch propeller device. It is not only the bearing part of the propulsion power, but also the final actuator of the pitch control. Therefore, the reliability of the propeller hub is very important. In the existing propeller hub, generally, the front end of the guide frame is inserted into the oil cylinder at the front end of the propeller hub, and its outer wall is slidingly connected with the closed-loop weir at the entrance of the oil cylinder, and the end of the stern shaft is inserted into the rear end of the guide frame, with bushings between them oil seal. The propeller hub with this structure has two more bushing o...

AI Technical Summary

Problems solved by technology

The propeller hub with this structure has two more bushing oil seals, and there are sealing problems between the bushing and propeller hub oil cylinder, bushing and guide frame. When working, the guide frame slides back and forth, and the oil pressure is high. , which can easily lead to leakage at the bushing

On the other hand, the hub body and the bushing belong to two parts and are processed separately, which will cause an eccentricity error between the guide frame and the bushing after assembly, causing the two parts to be stuck to each other and affecting the operation of the mechanism , it will also cause a large leakage phenomenon

[0003] In the existing propeller hub, the outer wall of the front end of the guide frame is different from the inner diameter of the rear end. This structure makes the force-bearing area of ​​the piston of the forward oil chamber smaller than that of the reverse oil chamber. The relative rotation angle remains unchanged, and the forces acting on the pistons of the two oil chambers must be kept in balance. Therefore, the working oil pressure of the forward oil chamber is much greater than the pressure of the reverse oil chamber; after the pressure is increased, not only the strength of the corresponding parts is raised requirements, and increases the risk of hydraulic system leakage

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