動力頭轉動異常情況及處理方法

donglitoushixuanwazuanjidezhuyaogongzuojijian
，tasuoshoudaodefuzaijifuzaidebianhualiangdoujiaoda
，yinci，zaixuanwazuanjishigongguochengzhongdonglitoudeguzhangshifeichangduode，bingqiechuxianguzhanghouwangwangxuyaotingjijianxiu
，geijizhudailaihendadejingjisunshi。

動力頭轉動異常主要有以下3種情況。

一：主泵顯示壓力過低，動力頭轉動不正常

(1)動dong力li頭tou油you座zuo上shang的de溢yi流liu閥fa卡ka住zhu或huo者zhe損sun壞huai導dao致zhi溢yi流liu壓ya力li過guo低di。此ci種zhong情qing況kuang往wang往wang具ju有you空kong載zai轉zhuan動dong正zheng常chang，負fu載zai轉zhuan動dong無wu力li或huo者zhe轉zhuan不bu動dong的de特te征zheng
，往wang往wang是shi由you於yu機ji主zhu不bu注zhu重zhong機ji器qi的de平ping時shi保bao養yang，液ye壓ya油you長chang期qi不bu更geng換huan或huo者zhe過guo濾lv，導dao致zhi閥fa芯xin卡ka滯zhi。清qing洗xi溢yi流liu閥fa閥fa芯xin，重zhong新xin調tiao節jie溢yi流liu壓ya力li或huo者zhe更geng換huan溢yi流liu閥fa即ji可ke消xiao除chu此ci類lei故gu障zhang。

(2)zhufaanquanfayiliuyaliguodi。zaizhufashangyibanhuiyouyigezhuanquanfahedulidegefapiandeyiliufa。zhuanquanfaxieyahekongzhidonglitougefapiandeyiliufaxieyadouhuizaochengdonglitouzhuandongwuli。ruguoshizhuanquanfayiliu，namebujindonglitouhuizhuanwuli，xingzou、主卷揚、副卷揚、回轉都會表現為無力狀態。重新調節好主安全閥或者動力頭閥片溢流閥溢流壓力，即可消除此類故障。

(3)youyujixieshiyongshijianchang

，zhubengmosunliangguoda
，zhubenggaodiyaqiangcuanyou
，daozhixitongyaliguodi。zhezhongqingkuangxia
，zhengbujiqidesuoyoudongzuodouhuibiaoxianweiwuli，cishizhinengweixiuzhubenghuozhegenghuanzhubeng。

(4)動力頭馬達磨損量過大，高低壓腔竄油
，導致馬達進油口
、回油口相對壓力過低
，引起動力頭轉動不正常。此類情況隻能維修馬達或者更換馬達。

二：主泵顯示壓力正常，動力頭轉動不正常

(1)lianjielunguyuhuizhuanzhichengdeluoshuanbeiquanbujianduan。zhezhongqingkuangkecongxiangtichilunyouguanchakoukandachiquanshifounenggouzhuandongpanduanchulai
，yeketongguotingdonglitouxiangtilishifouyoujinshumocashengpanduan。chanshengcileiqingkuangdegenbenyuanyinzaiyuzhuangpeishi
，luoshuanmeiyoudadaoshejiyujinliju

(2)聯接馬達與減速器的花鍵套磨損嚴重或者斷裂。判斷這種情況的方法是：帶dai負fu載zai轉zhuan動dong動dong力li頭tou，其qi中zhong有you一yi個ge馬ma達da升sheng溫wen特te別bie快kuai。從cong液ye壓ya油you的de惰duo性xing來lai分fen析xi
，對dui應ying花hua鍵jian套tao磨mo損sun嚴yan重zhong或huo者zhe斷duan裂lie的de那na個ge馬ma達da在zai工gong作zuo時shi所suo受shou的de負fu載zai是shi非fei常chang小xiao的de
，而er另ling一yi個ge馬ma達da的de負fu載zai非fei常chang大da
，大da部bu分fen的de液ye壓ya油you從cong受shou負fu載zai較jiao小xiao的de馬ma達da通tong過guo，此ci馬ma達da的de轉zhuan速su是shi平ping時shi的de兩liang倍bei左zuo右you，發fa熱re也ye就jiu自zi然ran快kuai了le。更geng換huan花hua鍵jian套tao即ji可ke消xiao除chu此ci類lei故gu障zhang。

(3)減jian速su器qi內nei部bu齒chi輪lun損sun壞huai或huo者zhe傳chuan動dong軸zhou斷duan裂lie。這zhe種zhong情qing況kuang的de判pan斷duan方fang法fa與yu花hua鍵jian套tao磨mo損sun嚴yan重zhong或huo者zhe斷duan裂lie情qing況kuang類lei似si。出chu現xian此ci類lei故gu障zhang時shi需xu更geng換huan減jian速su器qi齒chi輪lun或huo者zhe傳chuan動dong軸zhou。

(4)ruguoshidaiyougaosushuaitugongnengdexuanwazuanji，kongzhishuaitudeshunxufakazhuhuozhesunhuai，daozhidakaimocapiandeyouluhuiyoubuchang，mocapianchuyubanjiehezhuangtai，yehuiyinqidonglitouzhuandongyichang，zhezhongqingkuangqingxishunxufahuozhegenghuanshunxufajike，yekechaichushunxufa，quxiaogaosushuaitugongneng，yibaozhengzhengchangshigong。youguandusaiyehuidaozhileisideguzhangxianxiang
，chulifangfajiushishutongyouguan。

(5)shoubingbilijianyafademosunyanzhong
，xielouguodadaozhidonglitouhuizhuanyichang。yinweibilijianyafadexielouguoliang

，daozhizhufaxinbunengwanquandakai，donglitoumadagongyoubuzu，yehuidaozhidonglitouzhuandongsuduman。cishixuyaogenghuanbilijianyafa。

(6)電磁閥芯卡滯或者開啟不完全、先導油路壓力不足都會造成動力頭回轉無力，但主泵顯示壓力正常，需按不同情況進行換件或調整。

三：主泵顯示壓力很大，動力頭轉動不正常

(1)動dong力li頭tou內nei部bu的de回hui轉zhuan支zhi承cheng或huo者zhe軸zhou承cheng損sun壞huai，導dao致zhi動dong力li頭tou轉zhuan動dong異yi常chang。此ci種zhong情qing況kuang常chang常chang伴ban隨sui動dong力li頭tou箱xiang體ti內nei部bu不bu明ming響xiang聲sheng。此ci時shi應ying更geng換huan回hui轉zhuan支zhi承cheng或huo者zhe軸zhou承cheng。

(2)隨動架回轉支承損壞
，更換回轉支承。