門(men)式起(qi)(qi)(qi)重(zhong)(zhong)(zhong)機(ji)(ji)(又(you)稱(cheng)龍門(men)起(qi)(qi)(qi)重(zhong)(zhong)(zhong)機(ji)(ji))是(shi)橋架(jia)通過(guo)兩側(ce)支腿(tui)支撐在(zai)地面軌道上的(de)橋架(jia)型起(qi)(qi)(qi)重(zhong)(zhong)(zhong)機(ji)(ji)。在(zai)結構(gou)(gou)上由門(men)架(jia)、大(da)車(che)(che)運(yun)行機(ji)(ji)構(gou)(gou)、起(qi)(qi)(qi)重(zhong)(zhong)(zhong)小車(che)(che)和(he)電氣部分等(deng)組成(cheng)。有的(de)門(men)式起(qi)(qi)(qi)重(zhong)(zhong)(zhong)機(ji)(ji)只在(zai)一側(ce)有支腿(tui),另(ling)一側(ce)支撐在(zai)廠房或(huo)棧橋上運(yun)行,稱(cheng)作(zuo)(zuo)半門(men)式起(qi)(qi)(qi)重(zhong)(zhong)(zhong)機(ji)(ji)。門(men)式起(qi)(qi)(qi)重(zhong)(zhong)(zhong)機(ji)(ji)的(de)門(men)架(jia)上部橋架(jia)(含主梁和(he)端(duan)梁)、支腿(tui)、下橫梁等(deng)部分構(gou)(gou)成(cheng)。為了擴大(da)起(qi)(qi)(qi)重(zhong)(zhong)(zhong)機(ji)(ji)作(zuo)(zuo)業(ye)范圍,主梁可以向一側(ce)或(huo)兩側(ce)伸(shen)出支腿(tui)以外(wai),形成(cheng)懸(xuan)臂(bei)。也可采用帶臂(bei)架(jia)的(de)起(qi)(qi)(qi)重(zhong)(zhong)(zhong)小車(che)(che),通過(guo)臂(bei)架(jia)的(de)俯仰和(he)旋轉擴大(da)起(qi)(qi)(qi)重(zhong)(zhong)(zhong)機(ji)(ji)作(zuo)(zuo)業(ye)范圍。
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