基于UG 的燃气轮机起动离合器动力学仿真

为了解某燃气轮机起动离合器的工作过程,采用UG运动仿真技术对该离合器的起动和脱离过程进行了动力学仿真研究。根据离合器的结构建立了3维实体模型并设置了载荷输入,计算了在起动瞬间制动爪的受力情况和在脱离阶段各零件的运动状态。研究结果表明:在起动瞬间,棘轮和制动爪之间的空程导致了主动与从动部件之间有较大的冲击作用,可能引起零件失效;在脱开阶段,制动爪能与棘轮的棘齿平稳地脱离,没有因为起动电机的扭矩作用或燃机自身的加速而产生刮碰现象。分析了影响最大冲击力的主要因素,并通过仿真得出了空程距离与最大冲击力之间的关系,对离合器的设计和使用提出了建议。

Study on Dynamic Simulation of a Starting Clutch in Gas Turbin Based on UG

In order to understand the working process of a gas turbine starting clutch, a dynamic simulation study during starting and releasing was performed with the dynamic simulation technique of UG. According to the clutch structure, a 3D model was established and the loads input was made. Then the force conditions of brake ratchets at starting and the motion states of each part in the releasing process were calculated. The result shows that at starting, a heavy impact between driving and driven components caused by the back play between the brake ratchets and the ratchet wheel may lead to a part failure. In the releasing process, the brake ratchets can release the wheel teeth smoothly, and there is no scratch caused by the torque of the starting motor or by the acceleration of the gas turbine itself. The main factors that affect the maximum impact force are analyzed. The relationship between the idle distance and the maximum impact force are given by simulation. Some suggestions for the design and operation of the clutch are put forward