针对掘进机在煤矿井下工作时,由于巷道地质条件限制或者施工工序影响,当机器停机或者空载时,油液循环停止水冷却效果不好的问题。采用双联柱塞泵+齿轮泵结构设计,增加液压油冷却循环,有效降低油液温度,避免因冷却不足导致液压系统温度升高造成的元件频繁损坏故障。齿轮泵作为补油和油液循环装置使用时,有效解决井下传统补油方式效率低、易污染及冷却不足的问题。 For the boring machine working in the coal mine, due to the geological conditions of the roadway or the impact of the construction process, when the machine down or no load, the oil circulation to stop the problem of poor water cooling. Double piston pump + gear pump structure design, increase the hydraulic oil cooling cycle, effectively reduce the oil temperature, to avoid lack of cooling caused by the hydraulic system temperature caused by frequent damage to components failure. Gear pump as a fill oil and oil circulation device when used, effectively solve the traditional downhole underground oil inefficient, easy to pollution and lack of cooling problems.