钢球自锁液压缸与平衡阀参数匹配问题研究

Research on Parameter Matching between Steel Ball Self-locking Hydraulic Cylinder and Balance Valve

平衡阀安装于液压缸无杆腔内,用于平衡活塞杆受到的外负载,静态时可短期保持液压缸长度,动态时防止液压缸失速。但由于液压缸存在内泄漏,在外负载作用下,普通液压缸并不能长期保持工作长度不变。钢球自锁液压缸作为一种自锁型液压缸,具备行程极限位置机械自锁功能,在驱动阵面起竖后,液压缸可以长期保持工作长度不变,从而保证阵面工作角度长期不变。钢球自锁液压缸安装平衡阀后具备防止失速和极限位置长期保持工作长度的双重优点,但是当参数不匹配时,会出现延时误动作。文中研究的问题是如何进行液压缸与平衡阀的参数匹配。

The balance valve is installed in the none-rod cavity of the hydraulic cylinder to balance the external load on the rod,which can keep the length of the cylinder constant at static state in a short time and avoid the hydraulic cylinder stall in dynamic condition.But because of the leakage between the two cavities of the cylinder,the conventional cylinder can not keep the operation length constant for a long time under external load.The steel ball self-locking hydraulic cylinder has mechanical self-locking function at travel limit position.So,after antanna array is erected,the cylinder can keep the operation length constant for a long time,so as to ensure that the operation angle of the antenna array remains unchanged for a long time.The balance valve combined with the self-locking cylinder has double advantages of anti-stall and keeping length constant for a long time at limit position,but it appears time-delay actions when their parameters do not match.This paper studies the problem of parameter matching between the balance valve and the cylinder.