无噪声螺旋面桨及其动力系统的理论分析

用燃气轮机、新型脉动无级变速器与外径、长度均大的螺旋面桨组成动力系统后,由于桨的单位负载大大下降,因此当桨的转速降到某临界值以下（即无噪声）时,可提高隐身性能.桨的转速与其所耗功率呈线性关系,为平衡大转矩,采用一对机组对称布置,并使两桨的旋向及转向相反.结果表明：用变速杆与换向手柄配合可使船的加速、刹车、倒行及零半径转弯均快,能提高船的驾驶和行驶性能,并能自己进出泊位;可恒动率无级变速,使桨一机配合达到理想状态,发动机无剩余功率;航程及平均航速均能达到最大;油耗达到最低,有利于环保.

The Theoretical Analysis of Noiseless Helicoid Blade and its Power System

When the gas turbine,new impulse Continuously Variable Transmission （CVT）,and helicoidblade with increased outside diameter and length are combined to make up a power system,the propellerunit load will decline significantly. As a result,if the propeller＇s speed drops below a critical value（zeronoise condition）,it could improve the overall stealth performance. Since the rotating speed of the propellerand its power consumption forms a linear relationship,one pair of units is required to be arranged symmetrically to balance the large torque,and two paddles are needed to turn in the opposite direction of rotation.The results show that the connection of reversing lever and the shift lever could increase the ship＇s acceleration,brake,reverse operation,and zero turning radius. Thus,the ship＇s steering performance is improved,where the ship is able to go in and out from the berth automatically,the constant CVT rate movingcan be achieved,and the propellers and the engines could coordinate perfectly with no engine power wasted. In brief,the system enables the ship to reach the maximum range and average speed with less powerconsumption,which is essentially environmentally friendly.