文章以二次进给出口调速换接回路为例,首先介绍了液压系统的工作原理,然后利用AMESim对回路进行仿真,获得液压缸活塞位移曲线、速度曲线。并分析比较了采用节流阀与采用调速阀的出口调速回路的速度和位移特性,反映了其实际的工作特性。液压系统的模拟试验可以代替部分实物试验的中间试验过程,辅助设计人员选择、优化设计方案。 Taking the secondary feed outlet speed change exchange circuit as an example, this paper firstly introduces the working principle of the hydraulic system, and then uses AMESim to simulate the loop to get the piston displacement curve and velocity curve of the hydraulic cylinder. The speed and displacement characteristics of throttle control circuit and outlet speed control circuit with speed control valve were analyzed and compared, which reflected the actual operating characteristics. Hydraulic system simulation test can replace part of the physical test of the intermediate test process, assist designers to choose, optimize the design.