单向节流阀

使用变频调速电机代替原有的电磁调速电机，对液压系统进行重新设计，添加电液比例阀以及单向节流阀，保证自动控制的精度以及实验安全。

Use the variable frequency motor instead of the original electromagnetic speed-adjustable motor . Redesign of the hydraulic system , add electro-hydraulic proportional valve and one-way throttle valve to ensure the accuracy of automatic control and experimental safety .

单向节流阀，其中一个方向的流量是自由的，而另一个方向的流量却受到可调节的限制。

One-way Restrictor valve with free flow in one direction and variable restriction of flow in the other .

通过分析起升油缸回路的工作特点，提出采用换向阀节流限速、单向节流阀限速及平衡阀限速3种方式，可有效地防止重力超速现象的发生。

By analyzing the working features of the hydraulic circuit of the hoisting cylinder , the measures for preventing gravity overspeed are put forward , i.e. adopting circuit change valve or choke check or balance valve for speed control .

为了提高系统工作效率，系统采用了两级调压回路，同时综合比较各种平衡回路，选用采用液控单向阀和单向节流阀的平衡回路。

Two adjustable pressure circuits were used to enhance the system efficiency , and balanced circuit adopting Hydraulic Control One-way Valve and One-way Restrictive Valve was also used after compare all kinds of balanced circuit comprehensively .