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當前位置:首頁技術文章REXROTH葉(xie)片(pian)泵和葉(xie)片(pian)馬達的結構(gou)區別是什么

REXROTH葉片泵和葉片馬達的結構區別是什么

更新時間:2022-11-14點擊次數:1132

REXROTH葉(xie)片泵和葉(xie)片馬(ma)達(da)的結構區別是什(shen)么

葉片泵是動力輸(shu)入裝置,

葉片馬達是動力輸出(chu)裝置(zhi)。

其(qi)結構及工作原(yuan)理基(ji)本(ben)相同,理論上(shang)可(ke)以通用。

1.結構(gou)上說(shuo),進(jin)出口對壓(ya)力的適(shi)應不同,泵出口是高(gao)壓(ya)區(qu),馬達入(ru)口是高(gao)壓(ya)區(qu),結構(gou)強度不同。

2.泵是(shi)轉速高(gao)扭矩小,馬達一般轉速低(di)扭矩大(da),潤滑方式不同,軸結構也有區(qu)別(bie)。

單(dan)作用葉片泵(beng)的工(gong)作原(yuan)理是什么

葉片(pian)(pian)(pian)泵轉(zhuan)子旋轉(zhuan)時,葉片(pian)(pian)(pian)在離心力(li)和壓力(li)油(you)的(de)作用下(xia),尖部緊貼(tie)在定子內表(biao)面(mian)上。這樣兩個葉片(pian)(pian)(pian)與(yu)轉(zhuan)子和定子內表(biao)面(mian)所構成的(de)工作容積,先(xian)由小到(dao)大吸油(you)后再(zai)由大到(dao)小排(pai)油(you),葉片(pian)(pian)(pian)旋轉(zhuan)一周時,完成一次吸油(you)與(yu)排(pai)油(you)。

不同(tong)之處(chu)只在(zai)于定子表面是由(you)兩段(duan)長半徑圓弧(hu)、兩段(duan)短半徑圓弧(hu)和(he)四段(duan)過渡曲線(xian)八個部分組成,且(qie)定子和(he)轉子是同(tong)心的。密封(feng)工作(zuo)腔(qiang)的容積在(zai)左(zuo)上角(jiao)和(he)右下角(jiao)處(chu)逐漸增大,為(wei)(wei)吸油(you)區(qu)(qu),在(zai)左(zuo)下角(jiao)和(he)右上角(jiao)處(chu)逐漸減小,為(wei)(wei)壓油(you)區(qu)(qu);吸油(you)區(qu)(qu)和(he)壓油(you)區(qu)(qu)之間有(you)一(yi)段(duan)封(feng)油(you)區(qu)(qu)把(ba)它們(men)隔開。

這(zhe)種(zhong)泵的(de)轉子每轉一(yi)轉,每個(ge)密封工作腔完成吸油和(he)壓(ya)油動作各兩(liang)次,所以(yi)稱為雙作用葉片泵。泵的(de)兩(liang)個(ge)吸油區和(he)兩(liang)個(ge)壓(ya)油區是徑(jing)向(xiang)對稱的(de),作用在轉子上的(de)液壓(ya)力徑(jing)向(xiang)平(ping)衡,所以(yi)又稱為平(ping)衡式葉片泵。

擴展資料:

泵轉(zhuan)(zhuan)(zhuan)向(xiang)改變(bian),則其吸(xi)排方向(xiang)也改變(bian)葉片(pian)泵都(dou)有(you)規定(ding)的轉(zhuan)(zhuan)(zhuan)向(xiang),不(bu)允(yun)許(xu)反。因為轉(zhuan)(zhuan)(zhuan)子(zi)葉槽(cao)有(you)傾(qing)斜,葉片(pian)有(you)倒(dao)角(jiao),葉片(pian)底部與排油腔通,配油盤上(shang)的節流槽(cao)和吸(xi)、排口是按既定(ding)轉(zhuan)(zhuan)(zhuan)向(xiang)設計(ji)。可(ke)逆(ni)轉(zhuan)(zhuan)(zhuan)的葉片(pian)泵必須專門設計(ji)。

葉片(pian)(pian)泵裝配(pei) 配(pei)油盤與定(ding)子用定(ding)位(wei)銷(xiao)正確定(ding)位(wei),葉片(pian)(pian)、轉子、配(pei)油盤都不得裝反,定(ding)子內表(biao)面吸(xi)入(ru)(ru)區(qu)部分最易磨損(sun),必要時可將其翻轉安裝,以(yi)使(shi)原吸(xi)入(ru)(ru)區(qu)變為排(pai)出區(qu)而繼(ji)續(xu)使(shi)用。

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齒(chi)輪(lun)(lun)(lun)泵(beng)(beng)(beng)、葉片(pian)泵(beng)(beng)(beng)、柱(zhu)(zhu)塞泵(beng)(beng)(beng)最(zui)大(da)的(de)(de)區別是結(jie)(jie)構(gou)(gou)特點(dian)(dian)不一(yi)樣。齒(chi)輪(lun)(lun)(lun)泵(beng)(beng)(beng)的(de)(de)優(you)點(dian)(dian)結(jie)(jie)構(gou)(gou)簡單,維(wei)護方便,使用(yong)(yong)(yong)壽(shou)命長(chang),相對(dui)于(yu)其余兩(liang)種泵(beng)(beng)(beng)抗污染(ran)能力(li)強(qiang)。葉片(pian)泵(beng)(beng)(beng)的(de)(de)優(you)點(dian)(dian)結(jie)(jie)構(gou)(gou)緊湊,運動平(ping)穩,流量均勻,噪音(yin)小(xiao)。柱(zhu)(zhu)塞泵(beng)(beng)(beng)的(de)(de)優(you)點(dian)(dian)精度高(gao),密封(feng)性能好,工(gong)(gong)(gong)作(zuo)壓力(li)高(gao)。齒(chi)輪(lun)(lun)(lun)泵(beng)(beng)(beng)一(yi)般應用(yong)(yong)(yong)于(yu)工(gong)(gong)(gong)作(zuo)條件(jian)較惡(e)劣的(de)(de)工(gong)(gong)(gong)程機械、礦山機械、起重運輸機械、建(jian)筑機械、石油機械、農業(ye)機械以及其它壓力(li)加工(gong)(gong)(gong)設備(bei)中。葉片(pian)泵(beng)(beng)(beng)一(yi)本應用(yong)(yong)(yong)于(yu)機床設備(bei)比較廣泛。柱(zhu)(zhu)塞泵(beng)(beng)(beng)主要運用(yong)(yong)(yong)于(yu)高(gao)壓力(li)的(de)(de)機械及液壓傳動系(xi)統中。齒(chi)輪(lun)(lun)(lun)泵(beng)(beng)(beng)

體積較小(xiao),結(jie)構較簡單,對(dui)油的清(qing)潔度要求不嚴(yan),價格較便(bian)宜;但(dan)泵軸受不乎衡力,磨損(sun)嚴(yan)重,泄(xie)漏(lou)較大。

葉片泵

分(fen)為雙作用葉片泵(beng)和(he)單(dan)作用葉片泵(beng)。這種泵(beng)流量均勻、運轉(zhuan)平(ping)穩(wen)、噪(zao)聲(sheng)小工作壓力和(he)容(rong)積效率比齒(chi)輪泵(beng)高(gao)、結構(gou)比齒(chi)輪泵(beng)復雜。

柱塞泵

容積效率高(gao)、泄漏小,可在高(gao)壓下工作,大(da)多用于大(da)功率液壓系統;但結構復雜,材料(liao)和加(jia)工精度(du)(du)要求高(gao)、價格(ge)貴、對油的清潔度(du)(du)要求高(gao)。

一(yi)般在齒輪泵和葉片泵不能滿足要求時(shi)才用柱塞泵。還有(you)一(yi)些(xie)其他形式的液壓泵,如(ru)(ru)螺桿泵等,但應用不如(ru)(ru)上述(shu)3種普遍(bian)。

葉片泵的工作原理

葉片泵的結構較(jiao)齒輪泵復雜,其工作壓(ya)力較(jiao)大、流量(liang)脈動小、工作平穩、噪聲較(jiao)小、壽(shou)命較(jiao)長(chang),所以(yi)被廣(guang)泛應用(yong)于機械制造中(zhong)(zhong)(zhong)的專(zhuan)用(yong)機床、自動線等中(zhong)(zhong)(zhong)低壓(ya)液壓(ya)系統(tong)中(zhong)(zhong)(zhong)。

但其結(jie)構復雜,吸油(you)特性不太(tai)好,對油(you)液(ye)(ye)的污染也比較敏感。根據各密封工作容積(ji)在轉子(zi)旋轉 周吸、排(pai)液(ye)(ye)次數的不同,葉(xie)(xie)片(pian)(pian)泵(beng)分為(wei)兩類,即(ji)完(wan)成一(yi)次吸、排(pai)油(you)液(ye)(ye)的單作用(yong)葉(xie)(xie)片(pian)(pian)泵(beng)和完(wan)成兩次吸、排(pai)油(you)液(ye)(ye)的雙作用(yong)葉(xie)(xie)片(pian)(pian)泵(beng),單作用(yong)葉(xie)(xie)片(pian)(pian)泵(beng)多用(yong)于(yu)變(bian)量泵(beng),工作壓(ya)(ya)力最(zui)大為(wei)7.0MPa,雙作用(yong)葉(xie)(xie)片(pian)(pian)泵(beng)均為(wei)定(ding)量泵(beng),一(yi)般最(zui)大工作壓(ya)(ya)力亦(yi)為(wei)7.0MPa,結(jie)構經改進的高壓(ya)(ya)葉(xie)(xie)片(pian)(pian)泵(beng)最(zui)大工作壓(ya)(ya)力可達16.0-21.0MPa。

葉(xie)(xie)(xie)片泵是(shi)這樣工(gong)作的(de),它由轉子(zi)1、定(ding)子(zi)2、葉(xie)(xie)(xie)片3和(he)端(duan)蓋等組成。定(ding)子(zi)具有(you)圓柱形(xing)(xing)內表面,定(ding)子(zi)和(he)轉子(zi)間(jian)有(you)偏(pian)心距e,葉(xie)(xie)(xie)片裝在轉子(zi)槽(cao)中,并可(ke)在槽(cao)內滑(hua)動(dong),當轉子(zi)回(hui)轉時,由于離心力作用,使(shi)葉(xie)(xie)(xie)片緊靠在定(ding)子(zi)內壁(bi),這樣在定(ding)子(zi)、轉子(zi)、葉(xie)(xie)(xie)片和(he)兩側配油盤間(jian)形(xing)(xing)成若干(gan)個密封的(de)工(gong)作空間(jian)。

當轉(zhuan)子(zi)按圖(tu)示的(de)(de)方向回(hui)轉(zhuan)時,在圖(tu)的(de)(de)右(you)部,葉(xie)(xie)片(pian)(pian)逐漸(jian)(jian)伸出,葉(xie)(xie)片(pian)(pian)間(jian)(jian)的(de)(de)工作空(kong)間(jian)(jian)逐漸(jian)(jian)增大,從吸(xi)油(you)(you)(you)(you)(you)口吸(xi)油(you)(you)(you)(you)(you),這是吸(xi)油(you)(you)(you)(you)(you)腔。在圖(tu)的(de)(de)左部,葉(xie)(xie)片(pian)(pian)被定子(zi)內壁逐漸(jian)(jian)壓(ya)進(jin)葉(xie)(xie)片(pian)(pian)槽內,工作空(kong)間(jian)(jian)逐漸(jian)(jian)縮小(xiao),將油(you)(you)(you)(you)(you)液從壓(ya)油(you)(you)(you)(you)(you)口壓(ya)出就(jiu)是壓(ya)油(you)(you)(you)(you)(you)腔。在吸(xi)油(you)(you)(you)(you)(you)腔和壓(ya)油(you)(you)(you)(you)(you)腔之間(jian)(jian)有一段(duan)封油(you)(you)(you)(you)(you)區,把吸(xi)油(you)(you)(you)(you)(you)腔和壓(ya)油(you)(you)(you)(you)(you)腔隔開。這種葉(xie)(xie)片(pian)(pian)泵轉(zhuan)子(zi)每(mei)轉(zhuan)一周,每(mei)個(ge)工作空(kong)間(jian)(jian)完成(cheng)一次吸(xi)油(you)(you)(you)(you)(you)和壓(ya)油(you)(you)(you)(you)(you),因此(ci)稱為單作用葉(xie)(xie)片(pian)(pian)泵。轉(zhuan)子(zi)不停地旋轉(zhuan),泵就(jiu)不斷地吸(xi)液和排(pai)液。

葉片泵的種類

葉(xie)(xie)(xie)(xie)片(pian)(pian)(pian)(pian)泵(beng)的(de)工(gong)作(zuo)原(yuan)理(li)和(he)(he)結構比齒輪泵(beng)更(geng)(geng)(geng)(geng)復雜,但它具有(you)工(gong)作(zuo)壓(ya)(ya)力(li)更(geng)(geng)(geng)(geng)高、流量脈動(dong)更(geng)(geng)(geng)(geng)小、運行穩定、噪音更(geng)(geng)(geng)(geng)低、使用壽命更(geng)(geng)(geng)(geng)長等優點,因此被廣泛應用于(yu)專業機床、自(zi)動(dong)線等中(zhong)(zhong)低壓(ya)(ya)液壓(ya)(ya)系統。葉(xie)(xie)(xie)(xie)片(pian)(pian)(pian)(pian)泵(beng)分為(wei)單作(zuo)用葉(xie)(xie)(xie)(xie)片(pian)(pian)(pian)(pian)泵(beng)(最(zui)大(da)工(gong)作(zuo)壓(ya)(ya)力(li)為(wei)7.0兆(zhao)帕的(de)變量泵(beng))和(he)(he)雙(shuang)作(zuo)用葉(xie)(xie)(xie)(xie)片(pian)(pian)(pian)(pian)泵(beng)(最(zui)大(da)工(gong)作(zuo)壓(ya)(ya)力(li)為(wei)7.0兆(zhao)帕的(de)固定泵(beng))。單作(zuo)用葉(xie)(xie)(xie)(xie)片(pian)(pian)(pian)(pian)泵(beng)的(de)結構和(he)(he)原(yuan)理(li)定子(zi)(zi)有(you)一(yi)個圓柱形(xing)內表面(mian),定子(zi)(zi)和(he)(he)轉(zhuan)子(zi)(zi)之間(jian)有(you)一(yi)個偏心距。葉(xie)(xie)(xie)(xie)片(pian)(pian)(pian)(pian)安裝(zhuang)在(zai)(zai)轉(zhuan)子(zi)(zi)槽(cao)(cao)中(zhong)(zhong),可以(yi)在(zai)(zai)槽(cao)(cao)中(zhong)(zhong)移動(dong)。當轉(zhuan)子(zi)(zi)旋轉(zhuan)時(shi)(shi),葉(xie)(xie)(xie)(xie)片(pian)(pian)(pian)(pian)由于(yu)離(li)心力(li)而(er)緊靠定子(zi)(zi)的(de)內壁(bi),從而(er)在(zai)(zai)定子(zi)(zi)、轉(zhuan)子(zi)(zi)、葉(xie)(xie)(xie)(xie)片(pian)(pian)(pian)(pian)和(he)(he)兩(liang)側的(de)配油(you)(you)(you)盤之間(jian)形(xing)成幾個密封(feng)的(de)工(gong)作(zuo)區(qu)域。當轉(zhuan)子(zi)(zi)以(yi)圖中(zhong)(zhong)所(suo)示的(de)方向(xiang)旋轉(zhuan)時(shi)(shi),葉(xie)(xie)(xie)(xie)片(pian)(pian)(pian)(pian)逐(zhu)漸(jian)向(xiang)外(wai)延伸,并在(zai)(zai)葉(xie)(xie)(xie)(xie)片(pian)(pian)(pian)(pian)之間(jian)形(xing)成工(gong)作(zuo)空(kong)(kong)間(jian)。在(zai)(zai)圖的(de)左邊部分,葉(xie)(xie)(xie)(xie)片(pian)(pian)(pian)(pian)逐(zhu)漸(jian)被定子(zi)(zi)內壁(bi)壓(ya)(ya)入槽(cao)(cao)內,工(gong)作(zuo)空(kong)(kong)間(jian)逐(zhu)漸(jian)縮小,油(you)(you)(you)從壓(ya)(ya)油(you)(you)(you)口壓(ya)(ya)出,即壓(ya)(ya)油(you)(you)(you)腔。吸油(you)(you)(you)室和(he)(he)油(you)(you)(you)壓(ya)(ya)室之間(jian)有(you)一(yi)個油(you)(you)(you)封(feng)區(qu),將吸油(you)(you)(you)室和(he)(he)油(you)(you)(you)壓(ya)(ya)室隔開。葉(xie)(xie)(xie)(xie)片(pian)(pian)(pian)(pian)泵(beng)轉(zhuan)子(zi)(zi)旋轉(zhuan)一(yi)周(zhou),每個工(gong)作(zuo)空(kong)(kong)間(jian)完成吸油(you)(you)(you)和(he)(he)加壓(ya)(ya),所(suo)以(yi)稱為(wei)單作(zuo)用葉(xie)(xie)(xie)(xie)片(pian)(pian)(pian)(pian)泵(beng)。