离心锤变桨距机构设计与优化研究

针对现有高空飞艇螺旋桨推进系统中,采用变桨距技术重量代价大、能源消耗多的问题,设计一种基于离心力的离心锤变桨距机构,分析该机构的工作原理,并利用ADAMS软件进行机构运动学和动力学仿真分析;对离心锤进行参数化建模,建立约束方程后,以桨距优化角为目标函数,对离心锤的空间位置进行优化.结果表明:当外界条件引起螺旋桨转速变化时,该机构可以很好地实现螺旋桨变桨距功能;在现有平台上,48°的离心锤安装角具有最优的变距效果.

Research on the design and optimization of Centrifugal hammer pitch-controlled system

In a high altitude airship propeller system, at present, adopting the technology of variable pitch increases the weight and consumes more energy, this paper designed a kind of centrifugal hammer pitch-controlled system based on the centrifugal force , analyzed the working principle of the mechanism, and Kinematics and dynamics simulation analysis are carried out using the ADAMS software. The simulation result shows that when the propeller speed was changed, this system can accomplish the functions of variable pitch propeller, and verify the feasibility of the mechanism. According to the simulation results, apply parametric modeling of centrifugal hammer, establish a constraint equation and make the pitch Angle of optimization as the objective function, optimize the space position of the centrifugal hammer, the optimization results show that 48 degrees of centrifugal hammer installation Angle has the best effect of variable pitch for this platforms.