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歷史記錄
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歷史記錄
由于(yu)制造、安(an)裝、受載變(bian)形和溫度(du)變(bian)化等原因,當安(an)裝調整后(hou),難以(yi)保持兩軸(zhou)(zhou)(zhou)(zhou)(zhou)嚴格(ge)精確對(dui)中(zhong)。存在(zai)一定(ding)程(cheng)度(du)的(de)x、Y方向位移(yi)和偏斜角CI。當徑(jing)(jing)向位移(yi)較(jiao)大(da)時,可選滑塊聯(lian)(lian)(lian)軸(zhou)(zhou)(zhou)(zhou)(zhou)器(qi)(qi)(qi)(qi),角位移(yi)較(jiao)大(da)或(huo)(huo)(huo)相交兩軸(zhou)(zhou)(zhou)(zhou)(zhou)的(de)聯(lian)(lian)(lian)接可選用(yong)萬向聯(lian)(lian)(lian)軸(zhou)(zhou)(zhou)(zhou)(zhou)器(qi)(qi)(qi)(qi)等。聯(lian)(lian)(lian)軸(zhou)(zhou)(zhou)(zhou)(zhou)器(qi)(qi)(qi)(qi)由于(yu)種種原因使其質(zhi)(zhi)心(xin)或(huo)(huo)(huo)慣性主軸(zhou)(zhou)(zhou)(zhou)(zhou)與其加轉(zhuan)(zhuan)軸(zhou)(zhou)(zhou)(zhou)(zhou)線不(bu)(bu)重(zhong)合(he),SWC萬向聯(lian)(lian)(lian)軸(zhou)(zhou)(zhou)(zhou)(zhou)器(qi)(qi)(qi)(qi)在(zai)運轉(zhuan)(zhuan)時將(jiang)產生不(bu)(bu)平(ping)(ping)(ping)衡(heng)離心(xin)慣性力、離心(xin)慣性偶(ou)力和動撓(nao)度(du)(振型(xing))的(de)現(xian)象(xiang),稱為(wei)(wei)轉(zhuan)(zhuan)子(zi)(zi)的(de)不(bu)(bu)平(ping)(ping)(ping)衡(heng)現(xian)象(xiang),這(zhe)種不(bu)(bu)平(ping)(ping)(ping)衡(heng)現(xian)象(xiang)必然引(yin)起(qi)軸(zhou)(zhou)(zhou)(zhou)(zhou)系的(de)振動,從而影響機(ji)器(qi)(qi)(qi)(qi)的(de)正(zheng)常工作和使用(yong)壽命,SWC萬向聯(lian)(lian)(lian)軸(zhou)(zhou)(zhou)(zhou)(zhou)器(qi)(qi)(qi)(qi)因而對(dui)其必須(xu)加以(yi)重(zhong)視。不(bu)(bu)平(ping)(ping)(ping)衡(heng)的(de)程(cheng)度(du)(不(bu)(bu)平(ping)(ping)(ping)衡(heng)量(liang)U)通常用(yong)轉(zhuan)(zhuan)子(zi)(zi)的(de)質(zhi)(zhi)量(liang)m和質(zhi)(zhi)心(xin)到(dao)轉(zhuan)(zhuan)子(zi)(zi)回(hui)轉(zhuan)(zhuan)軸(zhou)(zhou)(zhou)(zhou)(zhou)線距(ju)離r的(de)乘積mr來表達,稱為(wei)(wei)質(zhi)(zhi)徑(jing)(jing)積。也有用(yong)單位質(zhi)(zhi)量(liang)的(de)質(zhi)(zhi)徑(jing)(jing)積來表達的(de),稱為(wei)(wei)偏心(xin)距(ju)e(不(bu)(bu)是(shi)幾(ji)何意(yi)義(yi)上的(de)偏心(xin)。)SWC萬向聯(lian)(lian)(lian)軸(zhou)(zhou)(zhou)(zhou)(zhou)器(qi)(qi)(qi)(qi)質(zhi)(zhi)徑(jing)(jing)積mr是(shi)一個與轉(zhuan)(zhuan)子(zi)(zi)質(zhi)(zhi)量(liang)有關(guan)的(de)相對(dui)量(liang),而偏心(xin)距(ju)e是(shi)一個與轉(zhuan)(zhuan)子(zi)(zi)質(zhi)(zhi)量(liang)無關(guan)的(de)***量(liang)。前者(zhe)比較(jiao)直觀(guan),SWC萬向聯(lian)(lian)(lian)軸(zhou)(zhou)(zhou)(zhou)(zhou)器(qi)(qi)(qi)(qi)常用(yong)于(yu)具體給定(ding)轉(zhuan)(zhuan)子(zi)(zi)的(de)平(ping)(ping)(ping)衡(heng)操作,后(hou)者(zhe)用(yong)于(yu)衡(heng)量(liang)轉(zhuan)(zhuan)子(zi)(zi)平(ping)(ping)(ping)衡(heng)的(de)優劣或(huo)(huo)(huo)檢(jian)測平(ping)(ping)(ping)衡(heng)精度(du),聯(lian)(lian)(lian)軸(zhou)(zhou)(zhou)(zhou)(zhou)器(qi)(qi)(qi)(qi)的(de)平(ping)(ping)(ping)衡(heng)等級標準即(ji)按e來評定(ding)。對(dui)于(yu)撓(nao)性轉(zhuan)(zhuan)子(zi)(zi)則(ze)用(yong)振型(xing)偏心(xin)距(ju)(第(di)n階(jie)(jie)振型(xing))en=Un/mn,Un、mn分別(bie)為(wei)(wei)第(di)n階(jie)(jie)振型(xing)和階(jie)(jie)模態質(zhi)(zhi)量(liang)。
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