亚洲国产精品久久久久秋霞_日韩精品一区二区三区影院_成人毛片无码一区二区三区_丰满少妇人妻hd高清大乳在线

混凝土泵

液壓系統的(de)(de)發(fa)熱按發(fa)熱原(yuan)因(yin)(yin)(yin)可分為兩大類：一(yi)類是(shi)由(you)于設計的(de)(de)原(yuan)因(yin)(yin)(yin)造成(cheng)的(de)(de)發(fa)熱；一(yi)類是(shi)由(you)于液壓元(yuan)件故障或使用不當的(de)(de)原(yuan)因(yin)(yin)(yin)，造成(cheng)的(de)(de)發(fa)熱。顯然，發(fa)熱原(yuan)因(yin)(yin)(yin)不同(tong)，其排除方法也不一(yi)樣。

1設(she)計不合理(li)，造成液壓系統的發熱及其(qi)排除(chu)

（1）液壓(ya)油(you)(you)(you)(you)的油(you)(you)(you)(you)號(hao)選(xuan)用不當，可能造成(cheng)液壓(ya)系(xi)(xi)統的發熱(re)所選(xuan)液壓(ya)油(you)(you)(you)(you)在油(you)(you)(you)(you)溫(wen)較低時，系(xi)(xi)統正常工(gong)作(zuo)，但系(xi)(xi)統工(gong)作(zuo)一段時間后，油(you)(you)(you)(you)溫(wen)升高，液壓(ya)油(you)(you)(you)(you)黏(nian)度下降，造成(cheng)系(xi)(xi)統內部泄漏(lou)增(zeng)加，伴(ban)隨泄漏(lou)的增(zeng)加更促使(shi)了油(you)(you)(you)(you)溫(wen)的上升，形成(cheng)油(you)(you)(you)(you)溫(wen)的惡性循環。解決(jue)的方法是：根據系(xi)(xi)統的負載及正常工(gong)作(zuo)溫(wen)度要求，選(xuan)擇合適黏(nian)度的液壓(ya)油(you)(you)(you)(you)。

（2）油(you)(you)(you)(you)(you)箱(xiang)(xiang)(xiang)(xiang)設(she)計(ji)(ji)不(bu)合(he)理(li)，使液壓系統散熱(re)效果(guo)降低系統發熱(re)油(you)(you)(you)(you)(you)箱(xiang)(xiang)(xiang)(xiang)的(de)主(zhu)要(yao)功能是儲存液壓油(you)(you)(you)(you)(you)，但它同時兼有散熱(re)、沉淀雜(za)質、分離(li)(li)水分的(de)作用。油(you)(you)(you)(you)(you)箱(xiang)(xiang)(xiang)(xiang)設(she)計(ji)(ji)不(bu)合(he)理(li)，主(zhu)要(yao)表(biao)現在兩個(ge)方面(mian)：一(yi)(yi)是油(you)(you)(you)(you)(you)箱(xiang)(xiang)(xiang)(xiang)體積(ji)(ji)設(she)計(ji)(ji)過小(xiao)，由于混凝土泵屬移動(dong)型液壓設(she)備，油(you)(you)(you)(you)(you)箱(xiang)(xiang)(xiang)(xiang)體積(ji)(ji)一(yi)(yi)般為液壓泵流量的(de)一(yi)(yi)倍左右，因此，油(you)(you)(you)(you)(you)箱(xiang)(xiang)(xiang)(xiang)散熱(re)面(mian)積(ji)(ji)及(ji)儲油(you)(you)(you)(you)(you)量均較小(xiao)；二是有些油(you)(you)(you)(you)(you)箱(xiang)(xiang)(xiang)(xiang)在結構上設(she)計(ji)(ji)不(bu)合(he)理(li)，吸油(you)(you)(you)(you)(you)管(guan)口(kou)(kou)和回(hui)油(you)(you)(you)(you)(you)管(guan)口(kou)(kou)較近(jin)，中間又不(bu)設(she)隔板，從而(er)縮(suo)短了油(you)(you)(you)(you)(you)液在油(you)(you)(you)(you)(you)箱(xiang)(xiang)(xiang)(xiang)內的(de)冷卻循環及(ji)沉淀雜(za)質的(de)路徑，甚至造成大(da)部分回(hui)油(you)(you)(you)(you)(you)直接進入吸油(you)(you)(you)(you)(you)管(guan)，使油(you)(you)(you)(you)(you)箱(xiang)(xiang)(xiang)(xiang)的(de)散熱(re)效果(guo)降低，油(you)(you)(you)(you)(you)溫升高。解決(jue)方法是：適當增加油(you)(you)(you)(you)(you)箱(xiang)(xiang)(xiang)(xiang)體積(ji)(ji)，使油(you)(you)(you)(you)(you)箱(xiang)(xiang)(xiang)(xiang)體積(ji)(ji)為（1125~115）Q，并盡量加大(da)吸油(you)(you)(you)(you)(you)管(guan)口(kou)(kou)與回(hui)油(you)(you)(you)(you)(you)管(guan)口(kou)(kou)之間的(de)距離(li)(li)，吸、回(hui)油(you)(you)(you)(you)(you)管(guan)之間應設(she)置隔板，以確保油(you)(you)(you)(you)(you)箱(xiang)(xiang)(xiang)(xiang)應有的(de)散熱(re)功率。

（3）散(san)(san)熱流量(liang)較(jiao)小，冷(leng)(leng)(leng)(leng)(leng)卻(que)器(qi)安(an)裝位(wei)置(zhi)不合理，使(shi)(shi)系(xi)統(tong)(tong)散(san)(san)熱能力(li)降低(di)(di)混凝土泵的(de)冷(leng)(leng)(leng)(leng)(leng)卻(que)方式有(you)風(feng)(feng)(feng)(feng)冷(leng)(leng)(leng)(leng)(leng)和水冷(leng)(leng)(leng)(leng)(leng)兩種，用戶可(ke)(ke)根據實際情(qing)況選用，但一般采(cai)(cai)用風(feng)(feng)(feng)(feng)冷(leng)(leng)(leng)(leng)(leng)較(jiao)多(duo)。有(you)些混凝土泵因考慮冷(leng)(leng)(leng)(leng)(leng)卻(que)器(qi)的(de)承(cheng)壓(ya)要求，將冷(leng)(leng)(leng)(leng)(leng)卻(que)器(qi)設置(zhi)在(zai)攪拌(ban)系(xi)統(tong)(tong)的(de)回油路(lu)上(shang)，僅對攪拌(ban)系(xi)統(tong)(tong)的(de)油液進行冷(leng)(leng)(leng)(leng)(leng)卻(que)，因攪拌(ban)系(xi)統(tong)(tong)流量(liang)較(jiao)小，因此整個(ge)(ge)系(xi)統(tong)(tong)冷(leng)(leng)(leng)(leng)(leng)卻(que)效果(guo)差，使(shi)(shi)系(xi)統(tong)(tong)發熱。解(jie)決的(de)方法：一是(shi)可(ke)(ke)采(cai)(cai)用獨立冷(leng)(leng)(leng)(leng)(leng)卻(que)回路(lu)，提(ti)高冷(leng)(leng)(leng)(leng)(leng)卻(que)效果(guo)。二(er)(er)是(shi)將冷(leng)(leng)(leng)(leng)(leng)卻(que)器(qi)設置(zhi)在(zai)系(xi)統(tong)(tong)總(zong)回油路(lu)上(shang)，以加大(da)散(san)(san)熱流量(liang)，提(ti)高冷(leng)(leng)(leng)(leng)(leng)卻(que)效果(guo)，但此時(shi)應注意(yi)兩個(ge)(ge)問(wen)題(ti)，個(ge)(ge)問(wen)題(ti)是(shi)冷(leng)(leng)(leng)(leng)(leng)卻(que)風(feng)(feng)(feng)(feng)扇(shan)(shan)的(de)轉(zhuan)速(su)，冷(leng)(leng)(leng)(leng)(leng)卻(que)風(feng)(feng)(feng)(feng)扇(shan)(shan)的(de)轉(zhuan)速(su)不能過低(di)(di)，否則將降低(di)(di)冷(leng)(leng)(leng)(leng)(leng)卻(que)效果(guo)，可(ke)(ke)采(cai)(cai)用電(dian)動(dong)機驅動(dong)風(feng)(feng)(feng)(feng)扇(shan)(shan)，或在(zai)總(zong)回油路(lu)上(shang)設置(zhi)一低(di)(di)壓(ya)驅動(dong)馬(ma)達(da)，使(shi)(shi)馬(ma)達(da)轉(zhuan)速(su)與散(san)(san)熱流量(liang)相匹配，同時(shi)還可(ke)(ke)解(jie)決主(zhu)回路(lu)壓(ya)力(li)沖擊(ji)對冷(leng)(leng)(leng)(leng)(leng)卻(que)器(qi)承(cheng)壓(ya)能力(li)的(de)影響；第二(er)(er)個(ge)(ge)問(wen)題(ti)是(shi)如采(cai)(cai)用電(dian)動(dong)機驅動(dong)風(feng)(feng)(feng)(feng)扇(shan)(shan)，主(zhu)系(xi)統(tong)(tong)的(de)壓(ya)力(li)沖擊(ji)對冷(leng)(leng)(leng)(leng)(leng)卻(que)器(qi)承(cheng)壓(ya)能力(li)的(de)影響，此時(shi)，可(ke)(ke)在(zai)回油路(lu)上(shang)與冷(leng)(leng)(leng)(leng)(leng)卻(que)器(qi)并(bing)裝一個(ge)(ge)低(di)(di)壓(ya)溢流保(bao)護閥或單(dan)向閥對冷(leng)(leng)(leng)(leng)(leng)卻(que)器(qi)進行高承(cheng)壓(ya)保(bao)護。

（4）液(ye)壓(ya)(ya)元(yuan)件(jian)(jian)(jian)選(xuan)型不當，造成系(xi)統(tong)(tong)發(fa)熱(re)混凝土泵液(ye)壓(ya)(ya)系(xi)統(tong)(tong)一(yi)般(ban)為(wei)高(gao)壓(ya)(ya)大流(liu)(liu)(liu)量(liang)系(xi)統(tong)(tong)，如(ru)果系(xi)統(tong)(tong)中的液(ye)壓(ya)(ya)元(yuan)件(jian)(jian)(jian)，主要是換向閥(fa)(fa)、溢流(liu)(liu)(liu)閥(fa)(fa)和順序閥(fa)(fa)規格選(xuan)用不合理，不能滿足(zu)大流(liu)(liu)(liu)量(liang)要求，從(cong)而(er)在(zai)使用中，使閥(fa)(fa)口液(ye)流(liu)(liu)(liu)流(liu)(liu)(liu)速過高(gao)，造成較大的壓(ya)(ya)力損(sun)失而(er)使油溫(wen)升高(gao)，因(yin)此，液(ye)壓(ya)(ya)系(xi)統(tong)(tong)設計中在(zai)進(jin)(jin)行(xing)液(ye)壓(ya)(ya)元(yuan)件(jian)(jian)(jian)選(xuan)型設計時，一(yi)定要根據液(ye)壓(ya)(ya)元(yuan)件(jian)(jian)(jian)所(suo)承(cheng)受(shou)的高(gao)工作壓(ya)(ya)力、所(suo)通過的大流(liu)(liu)(liu)量(liang)以及所(suo)要求的壓(ya)(ya)力和流(liu)(liu)(liu)量(liang)調(diao)整范圍進(jin)(jin)行(xing)元(yuan)件(jian)(jian)(jian)的選(xuan)擇(ze)，盡量(liang)減少(shao)閥(fa)(fa)口壓(ya)(ya)力損(sun)失，從(cong)而(er)減少(shao)由(you)于液(ye)壓(ya)(ya)元(yuan)件(jian)(jian)(jian)規格選(xuan)用不合理而(er)造成的系(xi)統(tong)(tong)發(fa)熱(re)。

（5）管(guan)路(lu)設(she)(she)(she)計、安裝(zhuang)不(bu)合理，造成(cheng)壓(ya)(ya)力損(sun)耗大，使(shi)壓(ya)(ya)力能轉(zhuan)換(huan)成(cheng)熱能在液壓(ya)(ya)系統設(she)(she)(she)計中(zhong)，管(guan)路(lu)的(de)設(she)(she)(she)計與安裝(zhuang)不(bu)能忽(hu)視，各管(guan)路(lu)管(guan)徑(jing)應(ying)嚴格按其工(gong)作壓(ya)(ya)力和通(tong)過(guo)流(liu)量進行(xing)設(she)(she)(she)計，避免管(guan)徑(jing)設(she)(she)(she)計過(guo)小，造成(cheng)流(liu)速過(guo)高，沿程(cheng)壓(ya)(ya)力損(sun)失(shi)(shi)過(guo)大，引起(qi)發熱。同時(shi)，還(huan)應(ying)注意管(guan)路(lu)的(de)安裝(zhuang)，既要(yao)做(zuo)到外(wai)觀整齊，又要(yao)避免管(guan)路(lu)集(ji)聚及管(guan)路(lu)的(de)急轉(zhuan)彎，影響管(guan)路(lu)的(de)自然散(san)熱或(huo)造成(cheng)局部壓(ya)(ya)力損(sun)失(shi)(shi)過(guo)大引起(qi)發熱。

2因(yin)液壓(ya)系統使用不當或(huo)元件(jian)故障，造成液壓(ya)系統的發(fa)熱及其排除

（1）油(you)(you)(you)(you)箱(xiang)內(nei)(nei)(nei)液壓(ya)油(you)(you)(you)(you)油(you)(you)(you)(you)面(mian)(mian)低于(yu)低液面(mian)(mian)，使(shi)油(you)(you)(you)(you)箱(xiang)散熱(re)(re)功率降低混凝土泵在(zai)使(shi)用過程中(zhong)，要(yao)隨時(shi)觀察油(you)(you)(you)(you)箱(xiang)內(nei)(nei)(nei)液壓(ya)油(you)(you)(you)(you)的油(you)(you)(you)(you)面(mian)(mian)高(gao)度，始終保持液壓(ya)油(you)(you)(you)(you)油(you)(you)(you)(you)面(mian)(mian)高(gao)度在(zai)正常(chang)油(you)(you)(you)(you)位范(fan)圍(wei)內(nei)(nei)(nei)，從而保證油(you)(you)(you)(you)箱(xiang)的散熱(re)(re)效(xiao)果，當油(you)(you)(you)(you)箱(xiang)內(nei)(nei)(nei)液壓(ya)油(you)(you)(you)(you)油(you)(you)(you)(you)面(mian)(mian)低于(yu)低液面(mian)(mian)時(shi)，要(yao)及時(shi)向油(you)(you)(you)(you)箱(xiang)內(nei)(nei)(nei)注油(you)(you)(you)(you)。

（2）冷(leng)(leng)(leng)(leng)卻(que)(que)(que)器(qi)(qi)(qi)冷(leng)(leng)(leng)(leng)卻(que)(que)(que)效果降(jiang)低(di)，使(shi)油液溫升(sheng)，系(xi)統發熱冷(leng)(leng)(leng)(leng)卻(que)(que)(que)器(qi)(qi)(qi)冷(leng)(leng)(leng)(leng)卻(que)(que)(que)效果降(jiang)低(di)，可能由以(yi)下原因引起：a1冷(leng)(leng)(leng)(leng)卻(que)(que)(que)器(qi)(qi)(qi)內(nei)部(bu)堵(du)塞或表面(mian)污物較多，造(zao)成冷(leng)(leng)(leng)(leng)卻(que)(que)(que)器(qi)(qi)(qi)安(an)全裝置開啟，冷(leng)(leng)(leng)(leng)卻(que)(que)(que)器(qi)(qi)(qi)過流量(liang)降(jiang)低(di)，使(shi)散熱流量(liang)減少，或冷(leng)(leng)(leng)(leng)卻(que)(que)(que)器(qi)(qi)(qi)通(tong)風不良，使(shi)冷(leng)(leng)(leng)(leng)卻(que)(que)(que)器(qi)(qi)(qi)的(de)冷(leng)(leng)(leng)(leng)卻(que)(que)(que)傳熱系(xi)數(shu)降(jiang)低(di)，冷(leng)(leng)(leng)(leng)卻(que)(que)(que)效果降(jiang)低(di)，因此，混凝(ning)土泵在(zai)使(shi)用中一定要定期(qi)檢(jian)查，疏通(tong)冷(leng)(leng)(leng)(leng)卻(que)(que)(que)器(qi)(qi)(qi)，定期(qi)對冷(leng)(leng)(leng)(leng)卻(que)(que)(que)器(qi)(qi)(qi)表面(mian)污物進行清除，保證冷(leng)(leng)(leng)(leng)卻(que)(que)(que)器(qi)(qi)(qi)的(de)內(nei)部(bu)暢通(tong)和外(wai)部(bu)清潔，以(yi)保證冷(leng)(leng)(leng)(leng)卻(que)(que)(que)器(qi)(qi)(qi)的(de)冷(leng)(leng)(leng)(leng)

卻效果。

冷(leng)(leng)(leng)卻(que)器安全閥(fa)或單(dan)向閥(fa)的(de)開啟(qi)壓(ya)(ya)力(li)低于標準值，使(shi)(shi)(shi)冷(leng)(leng)(leng)卻(que)器安全保(bao)護裝(zhuang)置(zhi)在冷(leng)(leng)(leng)卻(que)器未堵塞時開啟(qi)，產生溢流(liu)(liu)分(fen)流(liu)(liu)，使(shi)(shi)(shi)冷(leng)(leng)(leng)卻(que)器散熱(re)流(liu)(liu)量減少，因此，冷(leng)(leng)(leng)卻(que)器在使(shi)(shi)(shi)用前，一(yi)定要(yao)正(zheng)確調整(zheng)安全保(bao)護裝(zhuang)置(zhi)的(de)開啟(qi)壓(ya)(ya)力(li)，在使(shi)(shi)(shi)用中要(yao)定期檢查、校(xiao)正(zheng)安全保(bao)護裝(zhuang)置(zhi)的(de)開啟(qi)壓(ya)(ya)力(li)值。

（3）液壓(ya)(ya)(ya)(ya)(ya)(ya)系(xi)(xi)(xi)統(tong)(tong)(tong)(tong)(tong)壓(ya)(ya)(ya)(ya)(ya)(ya)力(li)(li)調整(zheng)不當，造(zao)成(cheng)系(xi)(xi)(xi)統(tong)(tong)(tong)(tong)(tong)發(fa)熱(re)在混凝土(tu)泵(beng)液壓(ya)(ya)(ya)(ya)(ya)(ya)系(xi)(xi)(xi)統(tong)(tong)(tong)(tong)(tong)中，由(you)于(yu)(yu)性(xing)能要求(qiu)，系(xi)(xi)(xi)統(tong)(tong)(tong)(tong)(tong)中往(wang)(wang)往(wang)(wang)設(she)(she)(she)有安(an)(an)(an)全(quan)閥(fa)(fa)(fa)(fa)、溢流閥(fa)(fa)(fa)(fa)和(he)順(shun)序(xu)(xu)(xu)閥(fa)(fa)(fa)(fa)等。若(ruo)安(an)(an)(an)全(quan)閥(fa)(fa)(fa)(fa)的(de)(de)(de)(de)(de)壓(ya)(ya)(ya)(ya)(ya)(ya)力(li)(li)調的(de)(de)(de)(de)(de)過低(di)(di)，安(an)(an)(an)全(quan)閥(fa)(fa)(fa)(fa)將(jiang)頻繁開啟(qi)，產生溢流損(sun)失(shi)(shi)，造(zao)成(cheng)系(xi)(xi)(xi)統(tong)(tong)(tong)(tong)(tong)發(fa)熱(re)；若(ruo)壓(ya)(ya)(ya)(ya)(ya)(ya)力(li)(li)調整(zheng)過高(gao)(gao)(gao)，又會使系(xi)(xi)(xi)統(tong)(tong)(tong)(tong)(tong)內泄(xie)漏增加，使系(xi)(xi)(xi)統(tong)(tong)(tong)(tong)(tong)發(fa)熱(re)，因此(ci)(ci)，應(ying)按(an)液壓(ya)(ya)(ya)(ya)(ya)(ya)系(xi)(xi)(xi)統(tong)(tong)(tong)(tong)(tong)的(de)(de)(de)(de)(de)負載要求(qiu)，正(zheng)確計算和(he)調整(zheng)安(an)(an)(an)全(quan)閥(fa)(fa)(fa)(fa)和(he)壓(ya)(ya)(ya)(ya)(ya)(ya)力(li)(li)值(zhi)(zhi)，從而保證系(xi)(xi)(xi)統(tong)(tong)(tong)(tong)(tong)在規定(ding)(ding)的(de)(de)(de)(de)(de)壓(ya)(ya)(ya)(ya)(ya)(ya)力(li)(li)范圍內工(gong)(gong)(gong)作(zuo)(zuo)。當混凝土(tu)泵(beng)泵(beng)送系(xi)(xi)(xi)統(tong)(tong)(tong)(tong)(tong)主(zhu)回路為閉(bi)式(shi)系(xi)(xi)(xi)統(tong)(tong)(tong)(tong)(tong)時，泵(beng)送系(xi)(xi)(xi)統(tong)(tong)(tong)(tong)(tong)中必須(xu)設(she)(she)(she)熱(re)交(jiao)換回路，熱(re)交(jiao)換回路中溢流閥(fa)(fa)(fa)(fa)的(de)(de)(de)(de)(de)設(she)(she)(she)定(ding)(ding)壓(ya)(ya)(ya)(ya)(ya)(ya)力(li)(li)應(ying)引(yin)起重視(shi)，設(she)(she)(she)定(ding)(ding)壓(ya)(ya)(ya)(ya)(ya)(ya)力(li)(li)過低(di)(di)，會使泵(beng)送液壓(ya)(ya)(ya)(ya)(ya)(ya)缸(gang)(gang)換向沖擊增加，設(she)(she)(she)定(ding)(ding)壓(ya)(ya)(ya)(ya)(ya)(ya)力(li)(li)過高(gao)(gao)(gao)，會使溢流損(sun)失(shi)(shi)過大，系(xi)(xi)(xi)統(tong)(tong)(tong)(tong)(tong)溫升過高(gao)(gao)(gao)。因此(ci)(ci)，應(ying)合理(li)確定(ding)(ding)熱(re)交(jiao)換回路溢流閥(fa)(fa)(fa)(fa)的(de)(de)(de)(de)(de)調整(zheng)壓(ya)(ya)(ya)(ya)(ya)(ya)力(li)(li)值(zhi)(zhi)，一般該溢流閥(fa)(fa)(fa)(fa)的(de)(de)(de)(de)(de)調整(zheng)值(zhi)(zhi)為（1~115）MPa，泵(beng)送系(xi)(xi)(xi)統(tong)(tong)(tong)(tong)(tong)補油(you)回路的(de)(de)(de)(de)(de)工(gong)(gong)(gong)作(zuo)(zuo)壓(ya)(ya)(ya)(ya)(ya)(ya)力(li)(li)為215MPa。當混凝土(tu)泵(beng)液壓(ya)(ya)(ya)(ya)(ya)(ya)系(xi)(xi)(xi)統(tong)(tong)(tong)(tong)(tong)中設(she)(she)(she)置順(shun)序(xu)(xu)(xu)閥(fa)(fa)(fa)(fa)時，一定(ding)(ding)要了解順(shun)序(xu)(xu)(xu)閥(fa)(fa)(fa)(fa)的(de)(de)(de)(de)(de)工(gong)(gong)(gong)作(zuo)(zuo)特點(dian)，正(zheng)確調整(zheng)順(shun)序(xu)(xu)(xu)閥(fa)(fa)(fa)(fa)的(de)(de)(de)(de)(de)工(gong)(gong)(gong)作(zuo)(zuo)壓(ya)(ya)(ya)(ya)(ya)(ya)力(li)(li)。如果內控式(shi)順(shun)序(xu)(xu)(xu)閥(fa)(fa)(fa)(fa)的(de)(de)(de)(de)(de)調整(zheng)壓(ya)(ya)(ya)(ya)(ya)(ya)力(li)(li)過高(gao)(gao)(gao)，當工(gong)(gong)(gong)作(zuo)(zuo)液壓(ya)(ya)(ya)(ya)(ya)(ya)缸(gang)(gang)的(de)(de)(de)(de)(de)工(gong)(gong)(gong)作(zuo)(zuo)壓(ya)(ya)(ya)(ya)(ya)(ya)力(li)(li)低(di)(di)于(yu)(yu)其調整(zheng)壓(ya)(ya)(ya)(ya)(ya)(ya)力(li)(li)時，順(shun)序(xu)(xu)(xu)閥(fa)(fa)(fa)(fa)閥(fa)(fa)(fa)(fa)口存在壓(ya)(ya)(ya)(ya)(ya)(ya)力(li)(li)損(sun)失(shi)(shi)，引(yin)起溫升，造(zao)成(cheng)系(xi)(xi)(xi)統(tong)(tong)(tong)(tong)(tong)發(fa)熱(re)，合理(li)確定(ding)(ding)內控式(shi)順(shun)序(xu)(xu)(xu)閥(fa)(fa)(fa)(fa)的(de)(de)(de)(de)(de)設(she)(she)(she)定(ding)(ding)壓(ya)(ya)(ya)(ya)(ya)(ya)力(li)(li)，可(ke)使工(gong)(gong)(gong)作(zuo)(zuo)缸(gang)(gang)的(de)(de)(de)(de)(de)工(gong)(gong)(gong)作(zuo)(zuo)壓(ya)(ya)(ya)(ya)(ya)(ya)力(li)(li)高(gao)(gao)(gao)于(yu)(yu)順(shun)序(xu)(xu)(xu)閥(fa)(fa)(fa)(fa)的(de)(de)(de)(de)(de)開啟(qi)壓(ya)(ya)(ya)(ya)(ya)(ya)力(li)(li)，順(shun)序(xu)(xu)(xu)閥(fa)(fa)(fa)(fa)工(gong)(gong)(gong)作(zuo)(zuo)時，閥(fa)(fa)(fa)(fa)口將(jiang)全(quan)開，閥(fa)(fa)(fa)(fa)口基本無壓(ya)(ya)(ya)(ya)(ya)(ya)力(li)(li)損(sun)失(shi)(shi)，從而避免(mian)了由(you)于(yu)(yu)順(shun)序(xu)(xu)(xu)閥(fa)(fa)(fa)(fa)設(she)(she)(she)定(ding)(ding)壓(ya)(ya)(ya)(ya)(ya)(ya)力(li)(li)不當而造(zao)成(cheng)的(de)(de)(de)(de)(de)系(xi)(xi)(xi)統(tong)(tong)(tong)(tong)(tong)發(fa)熱(re)。

（4）內泄(xie)(xie)(xie)增(zeng)加，可使油溫升高，系(xi)統(tong)(tong)發熱(re)混凝土(tu)泵(beng)液(ye)(ye)壓(ya)(ya)(ya)系(xi)統(tong)(tong)的(de)內泄(xie)(xie)(xie)，包(bao)括液(ye)(ye)壓(ya)(ya)(ya)泵(beng)、液(ye)(ye)壓(ya)(ya)(ya)缸、液(ye)(ye)壓(ya)(ya)(ya)馬達和液(ye)(ye)壓(ya)(ya)(ya)閥的(de)內泄(xie)(xie)(xie)，壓(ya)(ya)(ya)力(li)(li)油在泄(xie)(xie)(xie)漏過(guo)程中，壓(ya)(ya)(ya)力(li)(li)下(xia)降(jiang)，溫度升高。如果系(xi)統(tong)(tong)的(de)內泄(xie)(xie)(xie)增(zeng)加，會引(yin)起油溫升高，系(xi)統(tong)(tong)過(guo)熱(re)，嚴重時(shi)，會使系(xi)統(tong)(tong)壓(ya)(ya)(ya)力(li)(li)下(xia)降(jiang)，泵(beng)送(song)無(wu)力(li)(li)，泵(beng)送(song)排量降(jiang)低，攪拌無(wu)力(li)(li)，攪拌轉(zhuan)速下(xia)降(jiang)等。因此，要定(ding)期(qi)檢查這些元件，定(ding)期(qi)更(geng)換相應的(de)密封元件，及(ji)時(shi)對已損壞(huai)、拉傷的(de)零件進(jin)行更(geng)換或修理，甚至(zhi)更(geng)換相應的(de)液(ye)(ye)壓(ya)(ya)(ya)元件，從而(er)避免由于元件泄(xie)(xie)(xie)漏而(er)造(zao)成的(de)系(xi)統(tong)(tong)發熱(re)。

混凝土泵

液壓系統在使用過程中的發熱問題已成為不可忽視的問題之一，由于液壓系統的發熱，將導致混凝土泵許多故障的發生。對于混凝土泵生產廠家，應力求從設計入手，把其液壓系統的發熱降低至低值，這樣不僅可提高用戶混凝土泵的開機率和延長其使用壽命，而且可節能和降低維護費用；對于混凝土泵用戶，應力求從使用維護入手，嚴格按生產廠家的要求，正確使用、調試、檢查、維護混凝土泵，以減少故障率和減少因使用不當而引起的系統發熱。總之，對發熱產生的不同原因，采取一定措施后，可以控制或減輕液壓系統的發熱，提高

混凝土泵

的(de)開機率和(he)延(yan)長使用壽命。