本文所敘述的500kN 液壓拉力試驗(yàn)機(jī)是應(yīng)用于電力系統(tǒng)的輸變電建設(shè)中, 是一個(gè)典型的機(jī)電液一體化設(shè)備, 它包含了拉伸機(jī)構(gòu)、液壓系統(tǒng)、拉力傳感器及計(jì)算機(jī)控制系統(tǒng)。針對(duì)拉力試驗(yàn)機(jī)的特殊工況要求, 及原設(shè)備存在的缺點(diǎn)和不足, 重點(diǎn)對(duì)其液壓系統(tǒng)進(jìn)行了更新和改造, 同時(shí)對(duì)軟件的控制算法作了相應(yīng)的修改。改造后的拉力試驗(yàn)機(jī)具有操作方便、安全可靠的優(yōu)點(diǎn)。
關(guān)鍵詞: 拉力試驗(yàn)機(jī); 電液比例閥; 拉力傳感器; 保壓回路
Abstract : The 500kN hydraulic pulling force testing machine discussed in this paper is used in power transmisson constructions1It is a typical machine - electric - hydraulic equipment , containing drawing device , hydraulic system , pulling force sensor and computer control system1 In viewof the special operating mode and the shortcommings of the former equipment , emphasis is put on improvement of the hydraulic system , at the same2
time , relevant modifications are made in the control algorithm1 The improved pulling force test machine is convenient and safe to operate1
Keywords : Pulling force test machine ; Electric - hydraulic propotional valve ; Pulling force sensor ; Pressure maintaining system