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分析了现有液压支架液压系统可靠性低的原因,提出在支架液压系统中使用一种新型的常闭式操纵阀组,可提高其可靠性的技术措施,并介绍了该常闭式操纵阀组的组成及工作原理。
The reason of the low reliability of the existing hydraulic support hydraulic system is analyzed. A new type of normally closed pilot control valve set is proposed in the support hydraulic system, and the technical measures to improve the reliability of the hydraulic support system are introduced. The normally closed control valve Group composition and working principle.