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液(ye)(ye)壓泵是液(ye)(ye)壓系統的動(dong)力元件(jian),是靠(kao)發動(dong)機或電動(dong)機驅動(dong),從液(ye)(ye)壓油(you)箱中吸入油(you)液(ye)(ye),形成壓力油(you)排出,送(song)到執行元件(jian)的一種元件(jian)。液(ye)(ye)壓泵按(an)結構分為齒(chi)輪泵、柱塞泵、葉片泵和螺桿泵。下面小編為大家介紹液壓泵的種類及液壓泵的工作原理。 液(ye)壓泵的種類: 1、齒(chi)輪泵:體積較(jiao)(jiao)小,結構較(jiao)(jiao)簡單,對油的清潔度要求不嚴(yan),價(jia)格較(jiao)(jiao)便(bian)宜;但泵軸(zhou)受不平衡力,磨損嚴(yan)重,泄漏較(jiao)(jiao)大。 2、葉(xie)片(pian)泵(beng):分(fen)為雙(shuang)作(zuo)(zuo)用葉(xie)片(pian)泵(beng)和單(dan)作(zuo)(zuo)用葉(xie)片(pian)泵(beng)。這種泵(beng)流量均(jun)勻、運轉平穩、噪音小、作(zuo)(zuo)壓(ya)力(li)和容積效率比(bi)(bi)齒(chi)(chi)輪(lun)泵(beng)高(gao)、結構(gou)比(bi)(bi)齒(chi)(chi)輪(lun)泵(beng)復雜。 3、柱塞泵:容積(ji)效率(lv)高(gao)、泄漏小、可(ke)在高(gao)壓(ya)下工(gong)作、大(da)多(duo)用於大(da)功(gong)率(lv)液壓(ya)系統;但(dan)結構復雜(za),材(cai)料和加工(gong)精度(du)要求(qiu)高(gao)、價格貴(gui)、對油的(de)清潔度(du)要求(qiu)高(gao)。 液壓(ya)泵的(de)工作原理(li) 泵是一種能量轉(zhuan)換裝置,把電(dian)動(dong)(dong)機的(de)(de)旋(xuan)(xuan)轉(zhuan)機械能轉(zhuan)換為液(ye)(ye)(ye)(ye)(ye)(ye)壓能輸(shu)出。液(ye)(ye)(ye)(ye)(ye)(ye)壓泵都是依靠密封容(rong)(rong)積(ji)變化的(de)(de)原(yuan)理(li)來(lai)進行工(gong)作的(de)(de),故一般稱為容(rong)(rong)積(ji)式液(ye)(ye)(ye)(ye)(ye)(ye)壓泵,圖2-l 所示(shi)的(de)(de)是一單柱塞(sai)液(ye)(ye)(ye)(ye)(ye)(ye)壓泵的(de)(de)工(gong)作原(yuan)理(li)圖.圖中(zhong)(zhong)柱塞(sai)2裝在(zai)缸體(ti)(ti)3中(zhong)(zhong)形成一個(ge)密封容(rong)(rong)積(ji)a,柱塞(sai)在(zai)彈(dan)簧(huang)4的(de)(de)作用下始終(zhong)壓緊在(zai)偏(pian)心(xin)(xin)輪(lun)1上。原(yuan)動(dong)(dong)機驅動(dong)(dong)偏(pian)心(xin)(xin)輪(lun)1旋(xuan)(xuan)轉(zhuan)使(shi)柱塞(sai)2作往復運動(dong)(dong),使(shi)密封容(rong)(rong)積(ji)a的(de)(de)大(da)小(xiao)發生周期性的(de)(de)交替變化。當(dang)a由小(xiao)變大(da)時就(jiu)形成部分真空,使(shi)油(you)(you)(you)(you)箱中(zhong)(zhong)油(you)(you)(you)(you)液(ye)(ye)(ye)(ye)(ye)(ye)在(zai)大(da)氣壓作用下,經吸(xi)油(you)(you)(you)(you)管頂開單向(xiang)閥6進入油(you)(you)(you)(you)腔 a而實現(xian)吸(xi)油(you)(you)(you)(you);反之,當(dang)a由大(da)變小(xiao)時,a腔中(zhong)(zhong)吸(xi)滿的(de)(de)油(you)(you)(you)(you)液(ye)(ye)(ye)(ye)(ye)(ye)將頂開單向(xiang)閥5流入系統而實現(xian)壓油(you)(you)(you)(you)。這樣液(ye)(ye)(ye)(ye)(ye)(ye)壓泵就(jiu)將原(yuan)動(dong)(dong)機輸(shu)入的(de)(de)機械能轉(zhuan)換成液(ye)(ye)(ye)(ye)(ye)(ye)體(ti)(ti)的(de)(de)壓力(li)能,原(yuan)動(dong)(dong)機驅動(dong)(dong)偏(pian)心(xin)(xin)輪(lun)不(bu)斷(duan)旋(xuan)(xuan)轉(zhuan),液(ye)(ye)(ye)(ye)(ye)(ye)壓泵就(jiu)不(bu)斷(duan)地吸(xi)油(you)(you)(you)(you)和壓油(you)(you)(you)(you)。