关键词: 履带车辆, 行星式综合传动, 换挡过程, 冲击载荷

Abstract: The dynamic impacts generated during the transient shifting process of the planetary integrated transmission system of tracked vehicles seriously affect the service performance and reliability of the transmission system. For a certain planetary integrated transmission system, the torsional dynamics models of gear transmission components, clutches, brakes, etc. were established, and the dynamics model of the transmission system during the shifting process was constructed. The simulation and bench tests of the shifting process of the integrated transmission system were carried out. The changing trends of the simulation and test results are basically consistent, verifying the correctness of the dynamics model. The impact loads of typical components during the shifting process were further studied, and the influence laws of the throttle opening, the characteristics curve of oil charging and discharging, etc. on the dynamic torque of the operating components were revealed. The main conclusions are as follows: With the increase of the oil discharging delay, the reverse dynamic torque of the disengaging operating component gradually increases, and the maximum impact torque of the engaging operating component gradually increases; with the extension of the oil discharging time, the reverse dynamic torque of the disengaging operating component gradually increases, and the maximum impact torque of the engaging operating component first decreases and then increases; the faster the oil charging is in the fourth pressure increasing stage, the greater the maximum impact torque of the engaging operating component is, and the maximum value is 11% higher than the minimum value; with the increase of the throttle opening, the maximum dynamic torque of the operating component gradually increases, and the maximum value is 73.8% higher than the minimum value.

Key words: tracked vehicle, planetary power-shift steering transmission, shift process, impact torque