Abstract: In the coal mine environments, it was required that the mechanical equipment should have dustproof, explosion-proof and high reliability performance. A soft start method for the driving systems of the passenger devices was proposed by adjusting the pilot-oil circuit of the variable pumps in the hydrostatic drive systems. The speed of the motor and the pilot-oil pressure could increase steadily by changing the parameters of the accumulators and the damping holes. The results show that the pilot-oil circuit with a single damping hole reduces the boost rate significantly in the late stages, and the drive-motor may not reach the expected speed within the rated time. In the later stages of boosting, increasing the charging flow of accumulator by parallel flow or switching oil circuit may shorten the boosting time significantly. Selecting the accumulator volume as 0.4 L, when the oil is switched from the oil path where the 1.1 mm damping orifice locates to the oil path where the 1.4 mm damping orifice locates in the 9th second of the boosting processes, the system may have the optimal boosting curve of pilot-oil pressure from 4×105 Pa to 16×105 Pa within 15 seconds. In the meantime，the system may get the optimal soft start performance.

Key words: passenger device； hydrostatic system, soft start, accumulator, damping orifice

摘要： 针对煤矿井下环境对机械设备的防尘防爆及高可靠性要求，为实现乘人装置驱动系统的软启动，提出在静液压驱动系统中设计变量泵的先导控制油路，通过改变蓄能器与阻尼孔参数的方式优化控制油升压过程，调节马达转速平稳增大。研究结果表明：采用单一阻尼孔的控制油路在升压后期升压速率明显减小，驱动马达在额定时间内无法达到预期转速；在控制油升压后期利用油路并流或切换的方式增大蓄能器充液流量可显著缩短控制油路的升压时间；选择蓄能器容积为0.4 L，在升压过程的第9 s将油液从1.1 mm通径阻尼孔所在油路切换至1.4 mm通径阻尼孔所在油路时，可获得控制油压在15 s内从4×105 Pa升至16×105 Pa的最优升压曲线，得到系统最佳软启动性能。

关键词: 乘人装置, 静液压系统, 软启动, 蓄能器, 阻尼孔