The marine cross rudder comprises a vertical rudder blade and horizontal side wings which are in bilateral symmetry, the horizontal side wings are installed on the two sides of the vertical rudder blade in a bilateral symmetry mode, and a certain attack angle is formed between the horizontal side wings and the center line of a propeller shafting. The invention discloses a marine cross-shaped rudder, and aims to provide a technical scheme which can effectively solve the problem of motion trim of a low-speed ship without ballasting, and is particularly effective for a low-speed small ship with an unfavorable proportional relation between the length of the ship and the wavelength of the low-speed small ship, and the principle of the marine cross-shaped rudder is as follows: horizontal side wings with wing-shaped cross sections are additionally arranged on two sides of a vertical rudder blade; a reasonable attack angle is kept between the horizontal side wing and the rotational flow of the propeller, and a local wake flow field which is formed by propelling of the propeller and is relatively high in speed relative to the ship flows through the upper surface and the lower surface of the horizontal side wing; when the speed of the ship is low, constant upward or downward lift force can still be generated, so that the aim of improving the longitudinal trim of the low-speed ship during movement is fulfilled.
本发明公开了一种船用十字舵,包括垂向舵叶以及左右对称的水平侧翼,所述水平侧翼左右对称安装于垂向舵叶的两侧,所述的水平侧翼与螺旋桨轴系中心线之间具有一定的攻角。旨在提供一种不用压载即可有效解决低速船运动纵倾的技术方案,尤其对于船长与波长成不利比例关系的低速小船十分有效,船用十字舵的原理是在所述垂向舵叶的两侧加装具有机翼型截面形状的水平侧翼,并让水平侧翼与螺旋桨旋流保持合理的攻角,利用螺旋桨推进形成的相对于船速较高的局部尾流场,流过水平侧翼的上下表面,通过设置水平侧翼与螺旋桨轴系中心线之间的合理攻角,在船舶速度较低时仍然可以产生一个恒定向上或向下的升力,进而达到改善低速船舶运动纵倾的目的。
Marine cross rudder
一种船用十字舵
2023-10-27
Patent
Elektronische Ressource
Chinesisch
IPC: | B63H Schiffsantrieb oder Steuerung der Schiffe , MARINE PROPULSION OR STEERING |