伺服閥R901066145 4WS2EM10-5X/75B11ET315K8DV
R901066145 4WS2EM10-5X/75B11ET315K8DV
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R900961252 4WS2EM10-4X/10B3T315K8DV-24停產(chǎn),升級(jí)5X
R900378570 4WS2EM10-4X/20B2ET315Z8DM由下述型號(hào)組合替代: 4WS2EM10-5X/20B11ET315K8DV+Z8
R900772317 4WS2EM10-5X/60B11T315K31CV-114
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R901020256 4WS2EM10-5X/60B11ET315K8DV
R900750593 4WS2EM10-5X/10B11ET315K8BV
伺服閥的故障常常在電液伺服系統(tǒng)調(diào)試或工作不正常情況下發(fā)現(xiàn)的。所以這里有時(shí)是系統(tǒng)問(wèn)題包括放大器、反饋機(jī)構(gòu)、執(zhí)行機(jī)構(gòu)等故障,有時(shí)確是伺服閥問(wèn)題。所以首先要搞清楚是系統(tǒng)問(wèn)題、還是伺服閥問(wèn)題。解決這疑問(wèn)的常用辦法是:
一、有條件的將閥卸下,上實(shí)驗(yàn)臺(tái)復(fù)測(cè)一下即可。
二、大多數(shù)情況無(wú)此條件,這時(shí)一個(gè)簡(jiǎn)單的辦法是將系統(tǒng)開(kāi)環(huán),備用獨(dú)立直流電源、經(jīng)萬(wàn)用表再給伺服閥供正負(fù)不同量值電流,從閥的輸出情況來(lái)判斷閥是否有毛病,是什么毛病。伐問(wèn)題不大,再找系統(tǒng)問(wèn)題,例如:執(zhí)行機(jī)構(gòu)的內(nèi)漏過(guò)大,會(huì)引起系統(tǒng)動(dòng)作變慢,滯環(huán)嚴(yán)重、甚至不能工作;反饋信號(hào)斷路或失常等等,放大器問(wèn)題有輸出信號(hào)畸變或不工作,系統(tǒng)問(wèn)題這里不祥談,