Crank and slider hydraulic transmission type cycloidal propeller mechanism

Abstract

The invention aims to provide a crank and slider hydraulic transmission type cycloidal propeller mechanism. Blades of the mechanism are straight blades, all the blades are vertically distributed at the bottom of a ship body, and the blades swing around the axes of themselves while rotating around a spindle. A shaft of each blade is connected with a shaft of a corresponding swing hydraulic cylinder, two oil ports of each swing hydraulic cylinder are connected with two cavities of a corresponding double-rod linear hydraulic cylinder, and a piston rod of each linear hydraulic cylinder is fixedly connected with a slider of a crank and slider mechanism. The sliders and pistons of the linear hydraulic cylinders are driven to do reciprocating rectilinear movement through circumferential rotation of the cranks, power transmitted by oil of the linear hydraulic cylinders enables the swing hydraulic cylinders to swing in a reciprocating mode, and therefore the blades are driven to swing in a reciprocating mode, and the impelling action of a cycloidal propeller is achieved. The axial size of the cycloidal propeller is reduced, and the direction of force can be changed easily.

Description

technical field [0001] The invention relates to a marine cycloid propeller. Background technique [0002] In order to improve the maneuverability of surface ships and submarines and increase the propulsion efficiency of propellers, various propellers with special structures have emerged as the times require. As a marine propeller, the cycloidal propeller has attracted the attention of relevant scientific research institutions at home and abroad because of its high maneuverability, excellent acoustic characteristics, high propulsion efficiency and the ability to navigate in shallow water. [0003] The cycloid propeller is composed of a set of straight-wing blades perpendicular to the rotation plane and a control mechanism to control the deflection angle of the blades. Since the actual motion trajectory of the blades is a cycloid, it is called a cycloid propeller. The key to the design of the cycloid propeller lies in the control mechanism of the blade. In order to realize th...

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Problems solved by technology

[0004] For example, the application number is 85103046, and the patent document named "A Straight Wing Propeller" uses a cam mechanism to realize the cycloidal motion of the blade. A cam can only correspond to one contour curve, while different thrusts of cycloidal propellers correspond to The cam profile curve of the patent document is different, and the mechanism involved in this patent document cannot realize the adjustment of the propulsion force

Another example is the patent document whose application number is 200810062126.6 and whose name is "straight-wing cycloid propeller with stepping motor as control mechanism". Motor control takes extra power and has issues like wire tangles

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