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REXROTH柱(zhu)塞(sai)泵柱(zhu)塞(sai)往復(fu)運動總行(xing)(xing)(xing)程(cheng)L是不(bu)變(bian)的(de)(de)(de),由凸(tu)(tu)輪(lun)的(de)(de)(de)升程(cheng)決(jue)定。柱(zhu)塞(sai)每循(xun)環(huan)的(de)(de)(de)供(gong)油(you)(you)量(liang)大(da)小取決(jue)于供(gong)油(you)(you)行(xing)(xing)(xing)程(cheng),供(gong)油(you)(you)行(xing)(xing)(xing)程(cheng)不(bu)受凸(tu)(tu)輪(lun)軸控(kong)制是可(ke)變(bian)的(de)(de)(de)。供(gong)油(you)(you)開始(shi)時刻不(bu)隨(sui)供(gong)油(you)(you)行(xing)(xing)(xing)程(cheng)的(de)(de)(de)變(bian)化而變(bian)化。轉動柱(zhu)塞(sai)可(ke)改(gai)變(bian)供(gong)油(you)(you)終了時刻,從而改(gai)變(bian)供(gong)油(you)(you)量(liang)。REXROTH柱(zhu)塞(sai)泵工作(zuo)(zuo)時,在噴油(you)(you)泵凸(tu)(tu)輪(lun)軸上(shang)的(de)(de)(de)凸(tu)(tu)輪(lun)與(yu)柱(zhu)塞(sai)彈簧的(de)(de)(de)作(zuo)(zuo)用下,迫(po)使柱(zhu)塞(sai)作(zuo)(zuo)上(shang)、下往復(fu)運動,從而完成泵油(you)(you)任(ren)務,泵油(you)(you)過程(cheng)可(ke)分為以下兩(liang)個階段。
REXROTH柱塞泵缸體鑲裝銅套(tao)的,可以采用更換(huan)銅套(tao)的方法安裝。首先把(ba)一(yi)組柱塞桿外徑修整到(dao)統一(yi)尺寸,再用1000#以上的砂紙拋光外徑。
缸(gang)體(ti)(ti)安裝(zhuang)(zhuang)銅套的三種方法:(a)缸(gang)體(ti)(ti)加溫熱裝(zhuang)(zhuang)或銅套低溫冷凍擠壓,過盈(ying)裝(zhuang)(zhuang)配;(b)采有樂(le)泰膠(jiao)粘著裝(zhuang)(zhuang)配,這咱方法要求銅外(wai)套外(wai)徑表面有溝(gou)槽;(c)缸(gang)孔攻絲,銅套外(wai)徑加工螺紋,涂樂(le)泰膠(jiao)后,旋入裝(zhuang)(zhuang)配。
熔燒結合(he)方式的(de)缸體與銅套,安裝方法如下:
(a)采用(yong)(yong)研(yan)磨(mo)棒,手工(gong)或(huo)機械方法研(yan)磨(mo)修復(fu)(fu)缸孔(kong)(kong);(b)采用(yong)(yong)坐標鏜(tang)床,重新鏜(tang)缸體(ti)孔(kong)(kong);(c)采用(yong)(yong)鉸刀修復(fu)(fu)缸體(ti)孔(kong)(kong)。
采用“表(biao)(biao)面(mian)(mian)工(gong)程技(ji)(ji)術(shu)",方法(fa)如下:(a)電鍍(du)技(ji)(ji)術(shu):在(zai)(zai)柱(zhu)塞表(biao)(biao)面(mian)(mian)鍍(du)一層硬(ying)(ying)鉻;(b)電刷鍍(du)技(ji)(ji)術(shu):在(zai)(zai)柱(zhu)塞表(biao)(biao)面(mian)(mian)刷鍍(du)耐(nai)磨(mo)材(cai)料;(c)熱噴涂(tu)(tu)或(huo)電弧噴涂(tu)(tu)或(huo)電噴涂(tu)(tu):噴涂(tu)(tu)高碳馬(ma)氏(shi)體(ti)耐(nai)磨(mo)材(cai)料;(d)激光(guang)熔(rong)敷:在(zai)(zai)柱(zhu)塞表(biao)(biao)面(mian)(mian)熔(rong)敷高硬(ying)(ying)度耐(nai)磨(mo)合(he)金(jin)粉末(mo)。(4)缸體(ti)孔無銅(tong)套的(de)缸體(ti)材(cai)料大都是球(qiu)墨鑄鐵的(de),在(zai)(zai)缸體(ti)內壁上制(zhi)備非晶態(tai)薄膜或(huo)涂(tu)(tu)層。因為缸體(ti)孔內壁有了這種特殊物質,所以才能組成(cheng)硬(ying)(ying)—硬(ying)(ying)配對(dui)的(de)磨(mo)擦副。
特點:
1.閉式回路(lu)靜液壓傳動的斜(xie)盤式軸向柱塞(sai)變(bian)量(liang)泵;
2.流量(liang)與驅動速度和排量(liang)成正比(bi),并且(qie)可以(yi)是無級變量(liang);
3.隨著斜盤(pan)擺角的變化,流量由(you)0增大(da)到最大(da);
4.斜盤在(zai)中間位置上擺(bai)動(dong),可(ke)以平(ping)穩改變(bian)液(ye)流流動(dong)方(fang)向;
5.容易(yi)與(yu)不(bu)同的控制(zhi)與(yu)調(diao)節系統相配合的多種(zhong)變量方式;
6.力士樂泵具(ju)有兩個高壓油側的溢流閥(fa),以(yi)防止靜液(ye)壓傳動裝置超載;
7.高壓溢流閥還起(qi)到補(bu)油閥的作(zuo)用;
8.內(nei)置輔助泵(beng)既用(yong)作補油泵(beng)又可以用(yong)作控制泵(beng);
9.通過內(nei)置的補(bu)(bu)油溢流閥來(lai)限制高補(bu)(bu)油壓力。
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