Controllable pitch propeller unidirectional locking arrangement

Abstract

A one-way locking device for a controllable pitch propeller mainly solves the technical problems of lowering the swinging frequency of the pitch angle under the aheading condition and the like. The technical proposal adopted is as follows: a check valve is arranged between the front side of an ahead oil hole which is connected with a double oil hole tube of an ahead cavity of an oil cylinder and the rear side of an ahead oil distributing groove of an oil distributor sleeve gasket, the check valve is arranged in the valve body, the rear end of the valve body is fixedly connected with an oil distributing stub, and the valve body is internally provided with a control piston for controlling the check valve. The device is applicable to various types of controllable pitch propellers which are arranged at a head end oil distributor of a gear box and have the design pitch angle not more than 30 degrees.

Description

Technical field: [0001] The invention relates to a propulsion device for changing the pitch of propeller blades, in particular to a reciprocating device through a control element acting on a control element coaxial with the propeller. Background technique: [0002] The propeller is one of the important components of the ship propulsion device. In order to meet the needs of various navigation states or functions of the ship, the industry adopts the technical scheme of turning the propeller to adjust the pitch angle of the propeller. Correspondingly, various types of propellers have appeared in this technical field There are various structural schemes for rotating propellers, among which the more common one is to set a hydraulic cylinder in the hub of the propeller, the reciprocating motion of the piston of the cylinder is the power to rotate the propellers, and the piston runs in the forward and reverse oil chambers of the cylinder , its motion direction corresponds to the di...

AI Technical Summary

Problems solved by technology

[0003] During the actual ship’s navigation or operation, the rotor blade torsion is mainly composed of hydrodynamic force, centrifugal force and friction torque. The friction torque is in the opposite direction to the synthetic torque of the two formers, and its amount is also small. Therefore, the adjustment The above synthetic torque always exists on the blade after the pitch ends; when the design pitch angle of the blade of the controllable pitch propeller is less than or equal to 30°, in the reverse position, the above synthetic torque will not affect the stability of the blade at the set pitch angle position ; while in the positive parking position, due to the large value of the above synthetic torque, the oil in the front cavity of the oil cylinder will leak from the matching gap between the oil distributor seal sleeve and the matching short column, and the synthetic torque will rotate the paddle and leave the set position. At this time, the electronic control system of the controllable pitch propeller detects the change of the pitch angle, opens the control valve, and pulls the blade back to the command (set) pitch angle position. The problem of high swing frequency of the pitch angle of the parking space will aggravate the wear and tear of the pitch adjustment mechanism and cause continuous failures. When the swing is too large, it will cause abnormal navigation performance of the ship, or even cause the danger of overloading the main engine

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