橋式起重機的控制形勢和各種控制手段【靖起】
橋式起重機作業(ye)過程中,它(ta)的(de)控制(zhi)(zhi)(zhi)系統起到(dao)了(le)至(zhi)關重要的(de)作用,除了(le)比較常見的(de)凸(tu)輪控制(zhi)(zhi)(zhi)器(qi)(qi)控制(zhi)(zhi)(zhi)和主(zhu)令控制(zhi)(zhi)(zhi)器(qi)(qi)控制(zhi)(zhi)(zhi)這(zhe)兩種控制(zhi)(zhi)(zhi)形式之外,橋(qiao)式起重機還成功實現(xian)了(le)自動(dong)控制(zhi)(zhi)(zhi),從而提高了(le)每個動(dong)作的(de)性(xing)。
橋(qiao)式(shi)起重機的自(zi)動控制(zhi)系(xi)統中包括(kuo)了可編(bian)程序控制(zhi)器自(zi)動控制(zhi)、自(zi)動定位裝(zhuang)置控制(zhi)、大車運行(xing)機構的糾偏和電(dian)氣同步、電(dian)磁鐵及其(qi)控制(zhi)電(dian)路以及地(di)面(mian)控制(zhi)等幾個(ge)方面(mian)。
橋(qiao)式起重(zhong)機各(ge)(ge)機構的(de)(de)(de)(de)運(yun)行要(yao)依靠(kao)程序(xu)控制裝置來實現;而它的(de)(de)(de)(de)自動(dong)定(ding)(ding)位(wei),一般是根據被控對象的(de)(de)(de)(de)使(shi)用環(huan)境、精度(du)要(yao)求來確定(ding)(ding)裝置的(de)(de)(de)(de)機構形式,自動(dong)定(ding)(ding)位(wei)裝置通常(chang)使(shi)用各(ge)(ge)種檢測元件與繼電器、接(jie)觸(chu)器或可編(bian)程序(xu)控制器相(xiang)互配合,以(yi)達到自動(dong)定(ding)(ding)位(wei)的(de)(de)(de)(de)目的(de)(de)(de)(de)。
橋式起重機中(zhong)大(da)車運行(xing)機(ji)構的糾(jiu)(jiu)(jiu)偏(pian)(pian)(pian)和電(dian)氣同步分為(wei)(wei)人為(wei)(wei)糾(jiu)(jiu)(jiu)偏(pian)(pian)(pian)和自動(dong)(dong)(dong)糾(jiu)(jiu)(jiu)偏(pian)(pian)(pian),人為(wei)(wei)糾(jiu)(jiu)(jiu)偏(pian)(pian)(pian)是當糾(jiu)(jiu)(jiu)偏(pian)(pian)(pian)超(chao)過一定值后,糾(jiu)(jiu)(jiu)偏(pian)(pian)(pian)信號發(fa)(fa)生(sheng)器(qi)發(fa)(fa)出信號,司機(ji)斷開(kai)超(chao)前支腿側的電(dian)動(dong)(dong)(dong)機(ji),接通滯后支腿偏(pian)(pian)(pian)的電(dian)動(dong)(dong)(dong)機(ji)進行(xing)調整。而自動(dong)(dong)(dong)糾(jiu)(jiu)(jiu)偏(pian)(pian)(pian)是當偏(pian)(pian)(pian)斜超(chao)過一定值時(shi),糾(jiu)(jiu)(jiu)偏(pian)(pian)(pian)指令發(fa)(fa)生(sheng)器(qi)發(fa)(fa)出指令,系(xi)統進行(xing)自動(dong)(dong)(dong)糾(jiu)(jiu)(jiu)偏(pian)(pian)(pian)。電(dian)氣同步是在交流傳動(dong)(dong)(dong)中(zhong),常用帶(dai)有均(jun)衡電(dian)動(dong)(dong)(dong)機(ji)的電(dian)軸系(xi)統來(lai)實(shi)現電(dian)氣同步。
有(you)的(de)起重機會(hui)采(cai)用(yong)(yong)地面控(kong)(kong)制(zhi),其(qi)關鍵部件(jian)是(shi)手動(dong)按鈕(niu)開(kai)關,其(qi)中有(you)線遙控(kong)(kong)是(shi)通(tong)(tong)過專(zhuan)用(yong)(yong)電纜或動(dong)力線作為載波體,對信號用(yong)(yong)調(diao)制(zhi)解(jie)調(diao)器傳(chuan)輸(shu)方(fang)式(shi),達(da)到只用(yong)(yong)少量(liang)通(tong)(tong)道即可實現控(kong)(kong)制(zhi)的(de)方(fang)法。無(wu)線遙控(kong)(kong)利用(yong)(yong)當代電子技術(shu),將信息以電波或光波為通(tong)(tong)道形式(shi)傳(chuan)輸(shu),達(da)到控(kong)(kong)制(zhi)的(de)目的(de)。
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