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彈性齒(chi)(chi)(chi)(chi)(chi)式(shi)聯(lian)軸(zhou)(zhou)器(qi)是由齒(chi)(chi)(chi)(chi)(chi)數相同的內齒(chi)(chi)(chi)(chi)(chi)圈和帶外齒(chi)(chi)(chi)(chi)(chi)的凸緣半聯(lian)軸(zhou)(zhou)器(qi)等零件(jian)組成。外齒(chi)(chi)(chi)(chi)(chi)分(fen)為直(zhi)齒(chi)(chi)(chi)(chi)(chi)和鼓形(xing)齒(chi)(chi)(chi)(chi)(chi)兩種齒(chi)(chi)(chi)(chi)(chi)形(xing)，所謂(wei)鼓形(xing)齒(chi)(chi)(chi)(chi)(chi)即為將外齒(chi)(chi)(chi)(chi)(chi)制(zhi)成球面(mian)，球面(mian)中心在齒(chi)(chi)(chi)(chi)(chi)輪(lun)軸(zhou)(zhou)線上(shang)，齒(chi)(chi)(chi)(chi)(chi)側間隙(xi)較(jiao)一般齒(chi)(chi)(chi)(chi)(chi)輪(lun)大(da)，鼓形(xing)齒(chi)(chi)(chi)(chi)(chi)聯(lian)軸(zhou)(zhou)器(qi)可允許較(jiao)大(da)的角(jiao)位移(相對(dui)于直(zhi)齒(chi)(chi)(chi)(chi)(chi)聯(lian)軸(zhou)(zhou)器(qi))，可改善齒(chi)(chi)(chi)(chi)(chi)的接觸條(tiao)件(jian)，提高傳遞轉(zhuan)矩的能力，延長使用壽命。

彈性齒(chi)(chi)(chi)式聯軸(zhou)器(qi)(qi)在工作時(shi)，兩軸(zhou)產生相對(dui)位(wei)移(yi)，內外齒(chi)(chi)(chi)的齒(chi)(chi)(chi)面周期性作軸(zhou)向相對(dui)滑動，必然(ran)形(xing)成齒(chi)(chi)(chi)面磨(mo)損(sun)和(he)功率損(sun)耗，因此齒(chi)(chi)(chi)式聯軸(zhou)器(qi)(qi)需在良(liang)好(hao)潤滑和(he)密封的狀態下工作。

彈性齒(chi)式聯(lian)軸(zhou)(zhou)器徑向(xiang)尺(chi)寸小，承載能力大，常用于(yu)(yu)低速(su)重載工況條(tiao)件的(de)軸(zhou)(zhou)系(xi)傳動(dong)，如冶金、礦山(shan)、起重運輸行(xing)業(ye)(ye)，也適用于(yu)(yu)石油、化工、通(tong)用機(ji)械等(deng)行(xing)業(ye)(ye)。高(gao)精(jing)度并(bing)經動(dong)平衡的(de)齒(chi)式聯(lian)軸(zhou)(zhou)器可用于(yu)(yu)高(gao)速(su)傳動(dong)，如燃(ran)汽輪(lun)機(ji)的(de)軸(zhou)(zhou)系(xi)傳動(dong)。由于(yu)(yu)鼓(gu)形齒(chi)式聯(lian)軸(zhou)(zhou)器的(de)角向(xiang)補償大于(yu)(yu)直齒(chi)式聯(lian)軸(zhou)(zhou)器，國內(nei)外均廣泛采(cai)用鼓(gu)形齒(chi)式聯(lian)軸(zhou)(zhou)器。