吊(diao)(diao)架(jia)(jia)一(yi)般(ban)用(yong)(yong)于管(guan)(guan)(guan)子(zi)的(de)承重(zhong)(zhong)。其(qi)剛度(du)較(jiao)(jiao)小(xiao)(xiao),與管(guan)(guan)(guan)子(zi)之間又不(bu)(bu)(bu)存在(zai)摩擦力(li),故它對管(guan)(guan)(guan)系的(de)柔性(xing)限制較(jiao)(jiao)小(xiao)(xiao)。正因為(wei)它的(de)剛度(du)較(jiao)(jiao)小(xiao)(xiao),降低了管(guan)(guan)(guan)系的(de)穩定(ding)性(xing),因此在(zai)一(yi)個管(guan)(guan)(guan)系中,不(bu)(bu)(bu)可全(quan)部用(yong)(yong)吊(diao)(diao)架(jia)(jia)承重(zhong)(zhong)。另外,當管(guan)(guan)(guan)子(zi)有較(jiao)(jiao)大的(de)橫(heng)向位移時(shi),也不(bu)(bu)(bu)能選用(yong)(yong)吊(diao)(diao)架(jia)(jia),一(yi)般(ban)規定(ding)吊(diao)(diao)架(jia)(jia)吊(diao)(diao)桿的(de)偏(pian)轉(zhuan)角不(bu)(bu)(bu)大于4°。何時(shi)選用(yong)(yong)吊(diao)(diao)架(jia)(jia),何時(shi)選用(yong)(yong)其(qi)他形(xing)式的(de)承重(zhong)(zhong)架(jia)(jia),往往取(qu)決(jue)于可用(yong)(yong)的(de)支(zhi)架(jia)(jia)生根條件。當生根點位于被支(zhi)承管(guan)(guan)(guan)子(zi)的(de)上面時(shi),可考慮用(yong)(yong)吊(diao)(diao)架(jia)(jia)。常用(yong)(yong)的(de)吊(diao)(diao)架(jia)(jia)形(xing)式如圖(tu)9-26所示。


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  圖中共(gong)給(gei)出了A、B、C三種生根(gen)(gen)形式(shi)和1、2、3、4、5、6六種吊裝形式(shi)。兩者組合共(gong)可(ke)得到(dao)18種吊架(jia)(jia)形式(shi)。在生根(gen)(gen)部(bu)件和附(fu)管部(bu)件之間(jian)還(huan)可(ke)根(gen)(gen)據需要(yao)添加(jia)其他中間(jian)連接件,如可(ke)調螺母(又稱(cheng)花籃螺母)、彈簧吊架(jia)(jia)等。





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