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

小型混凝土泵車尾端(duan)擺動大的影響因素主要有：

1.回轉軸(zhou)承游(you)隙(xi)(xi)及(ji)其他間隙(xi)(xi) 臂架(jia)(jia)尾端擺動大在結構方(fang)面的(de)主(zhu)要原因是回轉支(zhi)撐軸(zhou)承的(de)游(you)隙(xi)(xi)，齒輪(lun)副及(ji)花鍵嚙合側隙(xi)(xi)、安裝剛性(xing)、臂架(jia)(jia)剛性(xing)、臂架(jia)(jia)與臂架(jia)(jia)之間連接間隙(xi)(xi)等不(bu)符合標準(zhun)。

回(hui)轉支撐軸承游隙大的缺點：

(1)軸(zhou)承靈(ling)活，啟動力矩小(xiao)。如果平(ping)衡閥開啟壓(ya)力設定較高，平(ping)衡閥一旦打開，臂(bei)架會快(kuai)速旋轉。平(ping)衡閥開啟壓(ya)力不夠時立即關(guan)閉平(ping)衡閥，易(yi)使(shi)臂(bei)架運行產生蠕動現(xian)象。

(2)在得到停止旋轉(zhuan)命令后，臂(bei)(bei)架(jia)由于慣性將繼(ji)續旋轉(zhuan)，因軸承(cheng)靈活，繼(ji)續旋轉(zhuan)時間增長，使臂(bei)(bei)架(jia)擺幅(fu)大。

(3)回轉支撐軸承(cheng)(cheng)的徑向游隙大(da)，在臂架展開施工(gong)時，軸承(cheng)(cheng)對回轉減(jian)速機(ji)施加(jia)附加(jia)徑向力(li)，易造成減(jian)速機(ji)上部(bu)軸承(cheng)(cheng)及密封(feng)損壞(huai)、減(jian)速機(ji)安(an)裝螺栓松動(dong)。

目(mu)前國產(chan)小型混凝土泵(beng)車主要使(shi)用(yong)(yong)進(jin)口(kou)的回轉支撐軸承(cheng)。國產(chan)軸承(cheng)使(shi)用(yong)(yong)較(jiao)少，游(you)隙(xi)也各不相同。一般(ban)來講，徑向游(you)隙(xi)控(kong)制在150μm以內(軸向游(you)隙(xi)可以適當大(da)一點)，使(shi)用(yong)(yong)效果(guo)較(jiao)好。

國內(nei)外少(shao)數(shu)企業，為(wei)了(le)減(jian)少(shao)臂(bei)架展開(kai)施(shi)工時(shi)回(hui)轉軸(zhou)承對回(hui)轉減(jian)速(su)(su)(su)(su)機(ji)施(shi)加(jia)附加(jia)徑(jing)向力(li)，增(zeng)加(jia)了(le)過輪(lun)。減(jian)速(su)(su)(su)(su)機(ji)上的(de)(de)小齒輪(lun)與雙過輪(lun)嚙合，回(hui)轉支撐軸(zhou)承徑(jing)向力(li)施(shi)加(jia)在過輪(lun)的(de)(de)安裝(zhuang)軸(zhou)上。并且為(wei)了(le)達到回(hui)轉減(jian)速(su)(su)(su)(su)機(ji)增(zeng)速(su)(su)(su)(su)降扭矩的(de)(de)目的(de)(de)，過輪(lun)使用(yong)了(le)齒數(shu)不(bu)等的(de)(de)雙聯齒輪(lun)。小型混凝土泵車使用(yong)雙回(hui)轉減(jian)速(su)(su)(su)(su)機(ji)增(zeng)大了(le)扭矩，節約了(le)成本。但設計時(shi)需注意，兩(liang)過輪(lun)必須同(tong)時(shi)能裝(zhuang)入(ru)。

2.液(ye)壓平(ping)衡閥調(diao)整不當 從液(ye)壓系統考慮，控制臂架擺幅與平(ping)衡閥參數調(diao)節有較大(da)關系。

啟(qi)動(dong)時(shi)(shi)進油(you)(you)側V口(kou)(kou)高壓(ya)(ya)油(you)(you)經單向(xiang)閥(fa)至C口(kou)(kou)驅動(dong)回轉液壓(ya)(ya)馬達，同時(shi)(shi)經內部油(you)(you)道(dao)e作(zuo)用于(yu)進油(you)(you)側壓(ya)(ya)力(li)(li)閥(fa)芯A的(de)先(xian)導活(huo)塞B克服2號彈簧(huang)力(li)(li)PS2，此時(shi)(shi)進油(you)(you)側壓(ya)(ya)力(li)(li)閥(fa)芯A只受1號彈簧(huang)力(li)(li)PS1作(zuo)用，因此，啟(qi)動(dong)時(shi)(shi)進油(you)(you)側壓(ya)(ya)力(li)(li)閥(fa)芯A的(de)壓(ya)(ya)力(li)(li)設定值PS應(ying)為(wei)：PS=PS1。啟(qi)動(dong)時(shi)(shi)進油(you)(you)側壓(ya)(ya)力(li)(li)閥(fa)芯A為(wei)高壓(ya)(ya)狀態，調(diao)(diao)整1號彈簧(huang)力(li)(li)PS1即可(ke)調(diao)(diao)整啟(qi)動(dong)壓(ya)(ya)力(li)(li)。

同時(shi)回油(you)(you)(you)側(ce)(ce)(ce)(ce)V口為(wei)低壓(ya)(ya)油(you)(you)(you)，經(jing)內(nei)部油(you)(you)(you)道e作(zuo)(zuo)用(yong)(yong)于回油(you)(you)(you)側(ce)(ce)(ce)(ce)壓(ya)(ya)力(li)閥(fa)(fa)芯A的(de)先導活塞B的(de)壓(ya)(ya)力(li)消失(shi)，彈(dan)簧力(li)PS2也作(zuo)(zuo)用(yong)(yong)于回油(you)(you)(you)側(ce)(ce)(ce)(ce)壓(ya)(ya)力(li)閥(fa)(fa)芯A，此時(shi)回油(you)(you)(you)側(ce)(ce)(ce)(ce)壓(ya)(ya)力(li)閥(fa)(fa)芯A同時(shi)受1號(hao)和2號(hao)兩側(ce)(ce)(ce)(ce)彈(dan)簧力(li)PS1和PS2作(zuo)(zuo)用(yong)(yong)，因(yin)此，停(ting)止(zhi)時(shi)回油(you)(you)(you)側(ce)(ce)(ce)(ce)壓(ya)(ya)力(li)閥(fa)(fa)芯A的(de)壓(ya)(ya)力(li)設定值PS應(ying)為(wei)：PS=PS1-PS2。停(ting)止(zhi)時(shi)回油(you)(you)(you)側(ce)(ce)(ce)(ce)壓(ya)(ya)力(li)閥(fa)(fa)芯A為(wei)低壓(ya)(ya)狀態(tai)，調整2號(hao)彈(dan)簧力(li)PS2即可調整停(ting)止(zhi)時(shi)緩沖壓(ya)(ya)力(li)。

啟動(dong)(dong)(dong)壓(ya)力(li)的調節(jie)：模擬工(gong)況下，先向外(wai)旋動(dong)(dong)(dong)1號(hao)(hao)彈(dan)簧(huang)(huang)使得臂架剛好不能正常旋轉工(gong)作，再(zai)回調1號(hao)(hao)彈(dan)簧(huang)(huang)半(ban)圈左右(you)，這樣啟動(dong)(dong)(dong)壓(ya)力(li)正好能使動(dong)(dong)(dong)臂架轉動(dong)(dong)(dong)又不致(zhi)過(guo)大(da)(da)。反向旋轉時(shi)，用同樣方法調節(jie)另外(wai)一個1號(hao)(hao)彈(dan)簧(huang)(huang)。緩沖壓(ya)力(li)的調節(jie)：旋動(dong)(dong)(dong)2號(hao)(hao)彈(dan)簧(huang)(huang)調整緩沖壓(ya)力(li)，使得PS=PS1-PS2略(lve)大(da)(da)于(yu)回轉減速機(ji)上(shang)的制動(dong)(dong)(dong)器(qi)開(kai)啟壓(ya)力(li)即(ji)可。通過(guo)以(yi)上(shang)調整，臂架旋轉平穩(wen)，不會產生蠕動(dong)(dong)(dong)現象。目前制動(dong)(dong)(dong)器(qi)開(kai)啟壓(ya)力(li)有(you)1.5?MPa、2.0?MPa、3.6?MPa等(deng)幾種(zhong)，陸地(di)風力(li)小的地(di)方應盡量選擇(ze)1.5?MPa的，海(hai)上(shang)施(shi)工(gong)時(shi)選擇(ze)較大(da)(da)的制動(dong)(dong)(dong)器(qi)開(kai)啟壓(ya)力(li)。

3.遙(yao)(yao)控器(qi)調整不(bu)當 泵車施工時(shi)，一般用(yong)遙(yao)(yao)控器(qi)操作臂架旋轉。德國HBC遙(yao)(yao)控接收器(qi)性能(neng)如(ru)下：遙(yao)(yao)控器(qi)搖桿(gan)從起始位置(zhi)到大位置(zhi)標準產品的(de)PWM通道輸出，快速擋時(shi)電(dian)流值(zhi)為200～500?mA。

在(zai)(zai)沒有(you)進(jin)行任何(he)調節的情況下，遙(yao)(yao)控發射(she)器搖(yao)桿(gan)(gan)可(ke)能(neng)在(zai)(zai)扳(ban)(ban)動(dong)(dong)(dong)(dong)(dong)一段空行程后，臂(bei)(bei)(bei)(bei)架(jia)(jia)才開始(shi)轉(zhuan)動(dong)(dong)(dong)(dong)(dong)，這時(shi)(shi)需(xu)要通過調節搖(yao)桿(gan)(gan)啟(qi)動(dong)(dong)(dong)(dong)(dong)時(shi)(shi)電(dian)(dian)流(liu)大小(xiao)(xiao)，使得(de)搖(yao)桿(gan)(gan)扳(ban)(ban)動(dong)(dong)(dong)(dong)(dong)小(xiao)(xiao)角(jiao)度臂(bei)(bei)(bei)(bei)架(jia)(jia)就有(you)動(dong)(dong)(dong)(dong)(dong)作(zuo)(L1指示燈閃(shan)爍，將搖(yao)桿(gan)(gan)扳(ban)(ban)動(dong)(dong)(dong)(dong)(dong)很小(xiao)(xiao)角(jiao)度，增(zeng)(zeng)加啟(qi)動(dong)(dong)(dong)(dong)(dong)電(dian)(dian)流(liu)，具(ju)體操作(zuo)見遙(yao)(yao)控器使用(yong)(yong)說明(ming))。同理調節遙(yao)(yao)桿(gan)(gan)在(zai)(zai)大位(wei)置時(shi)(shi)對應的電(dian)(dian)流(liu)值，能(neng)達(da)到(dao)臂(bei)(bei)(bei)(bei)架(jia)(jia)所需(xu)旋轉(zhuan)速度。另(ling)外，還得(de)調整臂(bei)(bei)(bei)(bei)架(jia)(jia)上升、下降線(xian)性(xing)(xing)狀態(tai)。通過線(xian)性(xing)(xing)狀態(tai)的調整改變搖(yao)桿(gan)(gan)動(dong)(dong)(dong)(dong)(dong)作(zuo)后臂(bei)(bei)(bei)(bei)架(jia)(jia)動(dong)(dong)(dong)(dong)(dong)作(zuo)的響應性(xing)(xing)(L2/L3指示燈閃(shan)爍，對應有(you)0～25%，25%～50%，50%～75%，75%～幾種(zhong)線(xian)性(xing)(xing)比(bi)例(li)。具(ju)體操作(zuo)見遙(yao)(yao)控器使用(yong)(yong)說明(ming)，總線(xian)控制遙(yao)(yao)控器可(ke)以直接設定線(xian)性(xing)(xing)延(yan)時(shi)(shi)時(shi)(shi)間，一般設定在(zai)(zai)500ms左右(you))。實際(ji)使用(yong)(yong)時(shi)(shi)，若(ruo)遇到(dao)搖(yao)桿(gan)(gan)輕動(dong)(dong)(dong)(dong)(dong)一小(xiao)(xiao)角(jiao)度臂(bei)(bei)(bei)(bei)架(jia)(jia)迅速轉(zhuan)動(dong)(dong)(dong)(dong)(dong)響應，而不能(neng)使臂(bei)(bei)(bei)(bei)架(jia)(jia)微動(dong)(dong)(dong)(dong)(dong)旋轉(zhuan)時(shi)(shi)，將啟(qi)動(dong)(dong)(dong)(dong)(dong)電(dian)(dian)流(liu)降低，增(zeng)(zeng)大線(xian)性(xing)(xing)比(bi)例(li)即可(ke)。