SWC型十字萬向軸的工作轉速高低和引起的離心力大小，對于高速傳動軸，應選用平衡的SWC型十字萬向聯軸器，不宜選用存在偏心的滑塊萬向節聯軸器等，所需傳遞的轉矩大小和性質以及對緩沖振動功能的要求。SWC型十字萬向聯軸器裝配完畢(bi)，花鍵副應(ying)(ying)滑(hua)動(dong)自如，關(guan)節應(ying)(ying)轉(zhuan)動(dong)靈活；SWC型(xing)十字萬(wan)向聯軸器(qi)內局部充滿工作液體，當(dang)泵輪在原動(dong)機帶動(dong)下旋轉(zhuan)時，工作液體便(bian)被泵輪葉片驅(qu)動(dong)。在離心力作用(yong)下，工作液體沿泵輪工作腔的曲(qu)面流向渦(wo)輪，同時產生切向力。

當(dang)泵(beng)輪(lun)(lun)(lun)(lun)內的(de)工(gong)作液體(ti)流到(dao)渦(wo)(wo)輪(lun)(lun)(lun)(lun)腔內時(shi)，由于切向力作用推動(dong)(dong)渦(wo)(wo)輪(lun)(lun)(lun)(lun)葉片(pian)，這樣渦(wo)(wo)輪(lun)(lun)(lun)(lun)轉(zhuan)(zhuan)(zhuan)矩(ju)(ju)。在(zai)剛啟動(dong)(dong)時(shi)，渦(wo)(wo)輪(lun)(lun)(lun)(lun)上(shang)受到(dao)的(de)轉(zhuan)(zhuan)(zhuan)矩(ju)(ju)不(bu)足以克(ke)服工(gong)作負(fu)荷，并不(bu)隨(sui)泵(beng)輪(lun)(lun)(lun)(lun)旋轉(zhuan)(zhuan)(zhuan)。轉(zhuan)(zhuan)(zhuan)矩(ju)(ju)克(ke)服負(fu)荷時(shi)，渦(wo)(wo)輪(lun)(lun)(lun)(lun)開(kai)始轉(zhuan)(zhuan)(zhuan)動(dong)(dong)，通過(guo)減速(su)器帶動(dong)(dong)輸(shu)送機運行。SWC型十字萬向聯(lian)軸(zhou)器在(zai)額定轉(zhuan)(zhuan)(zhuan)矩(ju)(ju)下的(de)滑差為3%~5%，渦(wo)(wo)輪(lun)(lun)(lun)(lun)上(shang)負(fu)荷增大，渦(wo)(wo)輪(lun)(lun)(lun)(lun)轉(zhuan)(zhuan)(zhuan)速(su)降低，在(zai)渦(wo)(wo)輪(lun)(lun)(lun)(lun)和泵(beng)輪(lun)(lun)(lun)(lun)內緣環(huan)形間隙處(chu)造成負(fu)壓，使(shi)后(hou)輔助室壓力降低。油(you)液就由泵(beng)輪(lun)(lun)(lun)(lun)上(shang)的(de)小孔倒(dao)流人后(hou)輔助室內，減小了(le)低速(su)時(shi)的(de)傳遞(di)轉(zhuan)(zhuan)(zhuan)矩(ju)(ju)，達到(dao)過(guo)載保護的(de)目(mu)的(de)。

傳(chuan)動系(xi)統(tong)的(de)(de)載荷(he)類(lei)別是選(xuan)(xuan)擇SWC型(xing)(xing)(xing)十(shi)(shi)字(zi)萬(wan)向(xiang)(xiang)聯(lian)軸(zhou)(zhou)器(qi)品(pin)種的(de)(de)基(ji)本依據，沖擊、振動和(he)轉矩變化較(jiao)大的(de)(de)工作(zuo)載荷(he)，應選(xuan)(xuan)擇具(ju)有彈(dan)性(xing)(xing)(xing)元件(jian)的(de)(de)撓(nao)性(xing)(xing)(xing)SWC型(xing)(xing)(xing)十(shi)(shi)字(zi)萬(wan)向(xiang)(xiang)聯(lian)軸(zhou)(zhou)器(qi)即彈(dan)性(xing)(xing)(xing)SWC型(xing)(xing)(xing)十(shi)(shi)字(zi)萬(wan)向(xiang)(xiang)聯(lian)軸(zhou)(zhou)器(qi)，以緩沖、減(jian)振、補(bu)償軸(zhou)(zhou)線偏移，傳(chuan)動系(xi)統(tong)工作(zuo)性(xing)(xing)(xing)能。載荷(he)變化較(jiao)大的(de)(de)并有沖擊、振動的(de)(de)軸(zhou)(zhou)系(xi)，宜選(xuan)(xuan)擇具(ju)有彈(dan)性(xing)(xing)(xing)元件(jian)且緩沖和(he)減(jian)振效果較(jiao)好(hao)的(de)(de)彈(dan)性(xing)(xing)(xing)SWC型(xing)(xing)(xing)十(shi)(shi)字(zi)萬(wan)向(xiang)(xiang)聯(lian)軸(zhou)(zhou)器(qi)。金屬彈(dan)性(xing)(xing)(xing)元件(jian)彈(dan)性(xing)(xing)(xing)SWC型(xing)(xing)(xing)十(shi)(shi)字(zi)萬(wan)向(xiang)(xiang)聯(lian)軸(zhou)(zhou)器(qi)承載能力高(gao)于非金屬彈(dan)性(xing)(xing)(xing)元件(jian)彈(dan)性(xing)(xing)(xing)SWC型(xing)(xing)(xing)十(shi)(shi)字(zi)萬(wan)向(xiang)(xiang)聯(lian)軸(zhou)(zhou)器(qi)，彈(dan)性(xing)(xing)(xing)元件(jian)受(shou)擠壓的(de)(de)彈(dan)性(xing)(xing)(xing)SWC型(xing)(xing)(xing)十(shi)(shi)字(zi)萬(wan)向(xiang)(xiang)聯(lian)軸(zhou)(zhou)器(qi)性(xing)(xing)(xing)高(gao)于彈(dan)性(xing)(xing)(xing)元件(jian)受(shou)剪切的(de)(de)彈(dan)性(xing)(xing)(xing)SWC型(xing)(xing)(xing)十(shi)(shi)字(zi)萬(wan)向(xiang)(xiang)聯(lian)軸(zhou)(zhou)器(qi)。

由于種(zhong)(zhong)種(zhong)(zhong)原因(yin)使(shi)其質(zhi)心或(huo)慣(guan)性(xing)主軸(zhou)(zhou)與其加轉軸(zhou)(zhou)線不重合，在運轉時將(jiang)產生不平(ping)衡(heng)(heng)離心慣(guan)性(xing)力(li)、離心慣(guan)性(xing)偶(ou)力(li)和動撓度的(de)(de)現(xian)(xian)象，稱為(wei)轉子的(de)(de)不平(ping)衡(heng)(heng)現(xian)(xian)象，這種(zhong)(zhong)不平(ping)衡(heng)(heng)現(xian)(xian)象必然引起軸(zhou)(zhou)系的(de)(de)振動，從(cong)而影響(xiang)機(ji)器(qi)(qi)的(de)(de)正常工作和使(shi)用壽命，因(yin)而對其加以重視。為(wei)了糾(jiu)正或(huo)大限度地減少(shao)SWC型(xing)十(shi)字萬(wan)向(xiang)聯(lian)軸(zhou)(zhou)器(qi)(qi)的(de)(de)不平(ping)衡(heng)(heng)量，應根據(ju)需要(yao)選擇(ze)適當的(de)(de)平(ping)衡(heng)(heng)等(deng)級(ji)，在機(ji)器(qi)(qi)上(shang)安裝完成(cheng)后，在SWC型(xing)十(shi)字萬(wan)向(xiang)聯(lian)軸(zhou)(zhou)器(qi)(qi)指定的(de)(de)平(ping)衡(heng)(heng)（校正）平(ping)面上(shang)，通過(guo)增加或(huo)減少(shao)適當質(zhi)量的(de)(de)方法，達到平(ping)衡(heng)(heng)等(deng)級(ji)要(yao)求。