虚拟样机技术在摆动液压缸中的应用

R&D on hydraulic rotary actuator based on virtual prototype technology

虚拟样机技术是一项新兴的产品开发技术,可以有效增强产品品质、缩短产品开发周期、降低产品生产成本。设计好摆动液压缸的虚拟样机,根据摆动液压缸的关键部件"双级渐开线螺旋副",研究了螺旋角β、输入液压力P和输出扭矩T三者之间的关系。通过比对虚拟样机仿真和物理样机实验,得出输入液压力P和输出扭矩T为线性正比关系,提高系统液压力P,相应得到增大的扭矩T;通过比较3个螺旋角系列螺旋齿轮组成的渐开线螺旋副输出扭矩T与导程l之间的关系,在没有齿轮变位的情况下,螺旋齿轮的螺旋角β应尽可能的设计在45°附近,在输入液压力P一定的情况下,优先考虑增大径向尺寸,以增大输出扭矩T。

Virtual prototype technology is a new method in R＆D ,w hich can effectively improve the product quality ,decrease the new product developing time and reduce the production cost .A virtual prototype of rotary actuator is built up for simulation .According to double involute-spiral-pairs ,w hich are the key parts of the hydraulic rotary actuator ,a research is done on the relationship between input pressure and output torque .After simulation and experiment ,it’s found that system pressure and output torque is in a positive linear programming . And another experiment is carried out on the relationship between different helix angles and output torques under same pressure .Through three series simulations within helix angles of 30° ,45° and 60° ,it’s found that we’d better design a helix gear in around 45° helix angle without any gear modification ,so that we can get a optimized output torque .If a bigger output torque is wanted without higher pressure ,the initial way is to increase the gear radial dimension .