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液(Ye)压(Ya)维(Wei)修(Xiu)

液(Ye)压(Ya)静(Jing)力(Li)压(Ya)桩(Zhuang)机(Ji)故(Gu)障(Zhang)的(De)分(Fen)析(Xi)与(Yu)排(Pai)除(Chu)

2017-10-12
次(Ci)

120t液(Ye)压(Ya)静(Jing)力(Li)压(Ya)桩(Zhuang)机(Ji)。(?)是(Shi)采(Cai)用(Yong)电(Dian)气(Qi)控(Kong)制(Zhi)、(?)液(Ye)压(Ya)操(Cao)纵(Zong)的(De)大(Da)型(Xing)桩(Zhuang)基(Ji)施(Shi)工(Gong)机(Ji)械(Xie)。(?)下(Xia)面(Mian)就(Jiu)该(Gai)机(Ji)在(Zai)使(Shi)用(Yong)过(Guo)程(Cheng)中(Zhong),(?)对(Dui)两(Liang)次(Ci)比(Bi)较(Jiao)典(Dian)型(Xing)故(Gu)障(Zhang)的(De)排(Pai)除(Chu)作(Zuo)一(Yi)分(Fen)析(Xi)。(?)

(一(Yi))液(Ye)压(Ya)系(Xi)统(Tong)有(You)低(Di)压(Ya)无(Wu)高(Gao)压(Ya)

现(Xian)象(Xiang):液(Ye)压(Ya)系(Xi)统(Tong)出(Chu)现(Xian)低(Di)压(Ya)区(Qu)压(Ya)力(Li)正(Zheng)常(Chang)。(?)高(Gao)压(Ya)民(Min)压(Ya)力(Li)上(Shang)不(Bu)去(Qu),(?)最(Zui)高(Gao)压(Ya)力(Li)只(Zhi)能(Neng)瞬(Shun)间(Jian)达(Da)到(Dao)11.76Mpa左(Zuo)右(You),(?)无(Wu)法(Fa)进(Jin)行(Xing)压(Ya)桩(Zhuang)。(?)故(Gu)障(Zhang)是(Shi)在(Zai)地(Di)层(Ceng)坚(Jian)硬(Ying)、(?)压(Ya)桩(Zhuang)机(Ji)常(Chang)处(Chu)在(Zai)满(Man)负(Fu)荷(He)及(Ji)超(Chao)负(Fu)荷(He)条(Tiao)件(Jian)下(Xia)工(Gong)作(Zuo)而(?)突(Tu)然(Ran)出(Chu)现(Xian)的(De)。(?)在(Zai)故(Gu)障(Zhang)发(Fa)生(Sheng)后(Hou),(?)曾(Zeng)对(Dui)整(Zheng)机(Ji)外(Wai)观(Guan)进(Jin)行(Xing)了(Liao)检(Jian)查(Cha),(?)未(Wei)发(Fa)现(Xian)有(You)漏(Lou)油(You)和(He)大(Da)量(Liang)渗(Shen)油(You)的(De)部(Bu)位(Wei)。(?)这(Zhe)说(Shuo)明(Ming)液(Ye)压(Ya)系(Xi)统(Tong)是(Shi)“(?)内(Nei)泄(Xie)”(?),(?)不(Bu)是(Shi)“(?)外(Wai)漏(Lou)”(?)。(?)

该(Gai)系(Xi)统(Tong)高(Gao)压(Ya)区(Qu)压(Ya)力(Li)上(Shang)不(Bu)去(Qu)的(De)因(Yin)素(Su)主(Zhu)要(Yao)有(You)四(Si)个(Ge):(?)

(1)ZBD40型(Xing)高(Gao)压(Ya)泵(Beng)工(Gong)作(Zuo)不(Bu)良(Liang)。(?)该(Gai)泵(Beng)为(Wei)斜(Xie)盘(Pan)式(Shi)轴(Zhou)向(Xiang)柱(Zhu)塞(Sai)液(Ye)压(Ya)泵(Beng),(?)当(Dang)柱(Zhu)塞(Sai)与(Yu)泵(Beng)体(Ti)配(Pei)合(He)间(Jian)隙(Xi)超(Chao)差(Cha)、(?)滑(Hua)靴(Xue)损(Sun)坏(Huai)、(?)端(Duan)盖(Gai)松(Song)动(Dong)均(Jun)可(Ke)造(Zao)成(Cheng)泄(Xie)漏(Lou),(?)使(Shi)系(Xi)统(Tong)高(Gao)压(Ya)上(Shang)不(Bu)去(Qu)。(?)

(2)溢(Yi)流(Liu)阀(Fa)1s工(Gong)作(Zuo)不(Bu)良(Liang)。(?)该(Gai)机(Ji)采(Cai)用(Yong)的(De)是(Shi)先(Xian)导(Dao)式(Shi)溢(Yi)流(Liu)阀(Fa),(?)这(Zhe)种(Zhong)阀(Fa)是(Shi)由(You)先(Xian)导(Dao)阀(Fa)和(He)主(Zhu)阀(Fa)两(Liang)大(Da)部(Bu)气(Qi)分(Fen)组(Zu)成(Cheng),(?)先(Xian)导(Dao)阀(Fa)实(Shi)际(Ji)是(Shi)个(Ge)小(Xiao)流(Liu)量(Liang)直(Zhi)动(Dong)式(Shi)溢(Yi)流(Liu)阀(Fa),(?)其(Qi)锥(Zhui)形(Xing)阀(Fa)芯(Xin)在(Zai)调(Diao)压(Ya)弹(Dan)簧(Huang)的(De)作(Zuo)用(Yong)下(Xia)压(Ya)在(Zai)阀(Fa)座(Zuo)上(Shang),(?)拧(Ning)动(Dong)调(Diao)整(Zheng)螺(Luo)钉(Ding)可(Ke)以(Yi)调(Diao)整(Zheng)工(Gong)作(Zuo)压(Ya)力(Li)。(?)如(Ru)调(Diao)压(Ya)弹(Dan)簧(Huang)折(Zhe)断(Duan)、(?)阀(Fa)芯(Xin)磨(Mo)损(Sun)或(Huo)两(Liang)阀(Fa)体(Ti)联(Lian)接(Jie)不(Bu)牢(Lao)均(Jun)能(Neng)造(Zao)成(Cheng)内(Nei)泄(Xie)。(?)

液(Ye)压(Ya)维(Wei)修(Xiu)

(3)电(Dian)磁(Ci)阀(Fa)15工(Gong)作(Zuo)不(Bu)良(Liang)。(?)该(Gai)阀(Fa)是(Shi)二(?)位(Wei)四(Si)通(Tong)电(Dian)磁(Ci)阀(Fa),(?)如(Ru)电(Dian)磁(Ci)阀(Fa)线(Xian)圈(Quan)烧(Shao)损(Sun)、(?)断(Duan)路(Lu)、(?)外(Wai)接(Jie)线(Xian)接(Jie)触(Chu)不(Bu)良(Liang)以(Yi)及(Ji)控(Kong)制(Zhi)该(Gai)阀(Fa)的(De)压(Ya)力(Li)继(Ji)电(Dian)器(Qi)8ZJ损(Sun)坏(Huai),(?)液(Ye)压(Ya)维(Wei)修(Xiu)均(Jun)能(Neng)造(Zao)成(Cheng)线(Xian)路(Lu)不(Bu)通(Tong)、(?)无(Wu)磁(Ci)场(Chang)和(He)吸(Xi)力(Li)、(?)阀(Fa)芯(Xin)不(Bu)动(Dong)作(Zuo),(?)处(Chu)在(Zai)常(Chang)开(Kai)状(Zhuang)态(Tai)出(Chu)现(Xian)系(Xi)统(Tong)“(?)内(Nei)泄(Xie)”(?)。(?)

(4)单(Dan)向(Xiang)阀(Fa)12损(Sun)坏(Huai)。(?)此(Ci)单(Dan)向(Xiang)阀(Fa)是(Shi)系(Xi)统(Tong)高(Gao)、(?)低(Di)压(Ya)力(Li)区(Qu)的(De)分(Fen)界(Jie)点(Dian),(?)当(Dang)系(Xi)统(Tong)压(Ya)力(Li)在(Zai)9.8MPa以(Yi)上(Shang)时(Shi).低(Di)压(Ya)区(Qu)形(Xing)成(Cheng)卸(Xie)荷(He)回(Hui)路(Lu)。(?)如(Ru)单(Dan)向(Xiang)阀(Fa)12损(Sun)坏(Huai),(?)液(Ye)压(Ya)维(Wei)修(Xiu)高(Gao)压(Ya)泵(Beng)输(Shu)出(Chu)的(De)油(You)也(Ye)沿(Yan)单(Dan)向(Xiang)阀(Fa)12一(Yi)溢(Yi)流(Liu)阀(Fa)10一(Yi)电(Dian)磁(Ci)阀(Fa)9返(Fan)回(Hui)油(You)箱(Xiang),(?)造(Zao)成(Cheng)系(Xi)统(Tong)能(Neng)量(Liang)损(Sun)失(Shi)。(?)

通(Tong)过(Guo)上(Shang)述(Shu)分(Fen)析(Xi),(?)对(Dui)液(Ye)压(Ya)、(?)电(Dian)气(Qi)元(Yuan)件(Jian)根(Gen)据(Ju)当(Dang)时(Shi)的(De)条(Tiao)件(Jian)分(Fen)别(Bie)解(Jie)体(Ti)检(Jian)查(Cha),(?)用(Yong)总(Zong)成(Cheng)件(Jian)替(Ti)换(Huan)法(Fa)进(Jin)行(Xing)鉴(Jian)定(Ding)和(He)诊(Zhen)断(Duan)。(?)首(Shou)先(Xian)更(Geng)换(Huan)高(Gao)压(Ya)泵(Beng)和(He)电(Dian)磁(Ci)阀(Fa)15,(?)然(Ran)后(Hou)调(Diao)整(Zheng)控(Kong)制(Zhi)系(Xi)统(Tong)高(Gao)压(Ya)区(Qu)工(Gong)作(Zuo)压(Ya)力(Li)的(De)溢(Yi)流(Liu)阀(Fa)但(Dan)压(Ya)力(Li)仍(Reng)不(Bu)正(Zheng)常(Chang),(?)这(Zhe)说(Shuo)明(Ming)故(Gu)障(Zhang)不(Bu)在(Zai)高(Gao)压(Ya)泵(Beng)和(He)电(Dian)磁(Ci)阀(Fa)上(Shang)。(?)其(Qi)次(Ci).又(You)对(Dui)单(Dan)向(Xiang)阀(Fa)和(He)溢(Yi)流(Liu)阀(Fa)进(Jin)行(Xing)解(Jie)体(Ti)检(Jian)查(Cha),(?)发(Fa)现(Xian)溢(Yi)流(Liu)阀(Fa)的(De)先(Xian)导(Dao)阀(Fa)体(Ti)与(Yu)主(Zhu)阀(Fa)体(Ti)的(De)联(Lian)接(Jie)螺(Luo)栓(Shuan)松(Song)动(Dong),(?)其(Qi)中(Zhong)一(Yi)条(Tiao)螺(Luo)栓(Shuan)已(Yi)被(Bei)剪(Jian)断(Duan)。(?)当(Dang)把(Ba)溢(Yi)流(Liu)阀(Fa)按(An)要(Yao)求(Qiu)安(An)装(Zhuang)好(Hao)之(Zhi)后(Hou),(?)调(Diao)整(Zheng)系(Xi)统(Tong)压(Ya)力(Li),(?)工(Gong)作(Zuo)压(Ya)力(Li)恢(Hui)复(Fu)正(Zheng)常(Chang)。(?)

故(Gu)障(Zhang)就(Jiu)出(Chu)在(Zai)先(Xian)导(Dao)阀(Fa)和(He)主(Zhu)阀(Fa)联(Lian)接(Jie)不(Bu)紧(Jin),(?)产(Chan)生(Sheng)泄(Xie)油(You)口(Kou)根(Gen)据(Ju)其(Qi)工(Gong)作(Zuo)原(Yuan)理(Li)(参(Can)看(Kan)图(Tu)2-9),(?)压(Ya)力(Li)油(You)首(Shou)先(Xian)进(Jin)入(Ru)阀(Fa)体(Ti)的(De)下(Xia)腔(Qiang),(?)并(Bing)通(Tong)过(Guo)小(Xiao)孔(Kong)F到(Dao)阀(Fa)芯(Xin)的(De)上(Shang)腔(Qiang),(?)再(Zai)过(Guo)小(Xiao)孔(Kong)C到(Dao)先(Xian)导(Dao)阀(Fa)前(Qian)腔(Qiang),(?)当(Dang)下(Xia)睦(Mu)的(De)压(Ya)力(Li)高(Gao)于(Yu)上(Shang)腔(Qiang)和(He)前(Qian)腔(Qiang)压(Ya)力(Li)时(Shi),(?)产(Chan)生(Sheng)漏(Lou)油(You),(?)因(Yin)此(Ci)阀(Fa)芯(Xin)不(Bu)下(Xia)移(Yi);在(Zai)下(Xia)腔(Qiang)和(He)上(Shang)腔(Qiang)、(?)前(Qian)腔(Qiang)压(Ya)力(Li)趋(Qu)于(Yu)相(Xiang)等(Deng)或(Huo)前(Qian)腔(Qiang)压(Ya)力(Li)高(Gao)于(Yu)下(Xia)腔(Qiang)时(Shi),(?)阀(Fa)芯(Xin)开(Kai)始(Shi)下(Xia)移(Yi)直(Zhi)到(Dao)压(Ya)至(Zhi)芯(Xin)座(Zuo)上(Shang),(?)使(Shi)系(Xi)统(Tong)压(Ya)力(Li)不(Bu)断(Duan)上(Shang)升(Sheng),(?)至(Zhi)达(Da)到(Dao)控(Kong)制(Zhi)压(Ya)力(Li)。(?)由(You)于(Yu)先(Xian)导(Dao)阀(Fa)和(He)阀(Fa)体(Ti)联(Lian)接(Jie)不(Bu)牢(Lao)固(Gu),(?)阀(Fa)体(Ti)上(Shang)腔(Qiang)产(Chan)生(Sheng)泄(Xie)漏(Lou),(?)使(Shi)小(Xiao)孔(Kong)C无(Wu)作(Zuo)用(Yong),(?)前(Qian)腔(Qiang)压(Ya)力(Li)不(Bu)随(Sui)系(Xi)统(Tong)压(Ya)力(Li)而(?)变(Bian)化(Hua),(?)锥(Zhui)形(Xing)阀(Fa)芯(Xin)打(Da)不(Bu)开(Kai),(?)作(Zuo)用(Yong)在(Zai)主(Zhu)阀(Fa)芯(Xin)上(Shang)部(Bu)的(De)压(Ya)力(Li)低(Di)于(Yu)下(Xia)部(Bu)压(Ya)力(Li),(?)使(Shi)主(Zhu)阀(Fa)芯(Xin)不(Bu)能(Neng)下(Xia)移(Yi)。(?)溢(Yi)流(Liu)阀(Fa)处(Chu)干(Gan)常(Chang)开(Kai)状(Zhuang)态(Tai),(?)所(Suo)以(Yi)整(Zheng)个(Ge)系(Xi)统(Tong)工(Gong)作(Zuo)压(Ya)力(Li)上(Shang)不(Bu)去(Qu)。(?)

〔(?)二(?))液(Ye)压(Ya)系(Xi)统(Tong)有(You)高(Gao)压(Ya)无(Wu)低(Di)压(Ya)

现(Xian)象(Xiang):接(Jie)通(Tong)电(Dian)饭(Fan)后(Hou),(?)起(Qi)动(Dong)电(Dian)动(Dong)机(Ji),(?)低(Di)压(Ya)区(Qu)的(De)压(Ya)力(Li)表(Biao)P1不(Bu)显(Xian)示(Shi),(?)液(Ye)压(Ya)维(Wei)修(Xiu)高(Gao)压(Ya)区(Qu)的(De)压(Ya)力(Li)表(Biao)P2达(Da)到(Dao)16.66Mpa限(Xian)定(Ding)值(Zhi),(?)而(?)需(Xu)要(Yao)的(De)时(Shi)间(Jian)比(Bi)原(Yuan)正(Zheng)常(Chang)达(Da)到(Dao)此(Ci)值(Zhi)的(De)时(Shi)间(Jian)多(Duo)2.5倍(Bei),(?)整(Zheng)机(Ji)的(De)其(Qi)他(Ta)动(Dong)作(Zuo)和(He)性(Xing)能(Neng)均(Jun)为(Wei)正(Zheng)常(Chang),(?)只(Zhi)是(Shi)时(Shi)间(Jian)为(Wei)正(Zheng)常(Chang)情(Qing)况(Kuang)的(De)2-3倍(Bei)。(?)系(Xi)统(Tong)中(Zhong)低(Di)压(Ya)区(Qu)无(Wu)压(Ya)力(Li),(?)整(Zheng)机(Ji)工(Gong)作(Zuo)速(Su)度(Du)放(Fang)慢(Man),(?)时(Shi)间(Jian)增(Zeng)加(Jia),(?)这(Zhe)说(Shuo)明(Ming)系(Xi)统(Tong)的(De)工(Gong)作(Zuo)油(You)供(Gong)应(Ying)放(Fang)慢(Man).根(Gen)据(Ju)液(Ye)压(Ya)原(Yuan)理(Li)图(Tu)分(Fen)析(Xi)可(Ke)知(Zhi),(?)低(Di)压(Ya)区(Qu)工(Gong)作(Zuo)不(Bu)良(Liang),(?)高(Gao)压(Ya)区(Qu)工(Gong)作(Zuo)正(Zheng)常(Chang).故(Gu)障(Zhang)可(Ke)能(Neng)出(Chu)现(Xian)在(Zai)下(Xia)列(Lie)元(Yuan)件(Jian)上(Shang)。(?)

(1)压(Ya)力(Li)表(Biao)P,损(Sun)坏(Huai)。(?)

(2)CBN-E680型(Xing)低(Di)压(Ya)泵(Beng)工(Gong)作(Zuo)不(Bu)良(Liang)。(?)

①(?)该(Gai)泵(Beng)与(Yu)电(Dian)动(Dong)机(Ji)联(Lian)接(Jie)不(Bu)牢(Lao)或(Huo)脱(Tuo)节(Jie);

②(?)泵(Beng)体(Ti)因(Yin)磨(Mo)损(Sun)造(Zao)成(Cheng)径(Jing)向(Xiang)或(Huo)轴(Zhou)向(Xiang)泄(Xie)漏(Lou);

③(?)泵(Beng)的(De)前(Qian)、(?)后(Hou)端(Duan)盖(Gai)松(Song)动(Dong)造(Zao)成(Cheng)泄(Xie)漏(Lou)。(?)

(3)溢(Yi)流(Liu)阀(Fa)10工(Gong)作(Zuo)不(Bu)良(Liang)。(?)溢(Yi)流(Liu)阀(Fa)主(Zhu)体(Ti)和(He)先(Xian)导(Dao)阀(Fa)体(Ti)联(Lian)接(Jie)不(Bu)牢(Lao)。(?)或(Huo)油(You)脏(Zang)造(Zao)成(Cheng)阀(Fa)芯(Xin)活(Huo)动(Dong)受(Shou)阻(Zu)而(?)泄(Xie)油(You)。(?)

(4)电(Dian)磁(Ci)阀(Fa)9工(Gong)作(Zuo)不(Bu)良(Liang)。(?)控(Kong)制(Zhi)线(Xian)路(Lu)断(Duan)路(Lu),(?)线(Xian)圈(Quan)烧(Shao)坏(Huai),(?)造(Zao)成(Cheng)阀(Fa)芯(Xin)不(Bu)动(Dong)作(Zuo)而(?)泄(Xie)油(You)。(?)

(5)控(Kong)制(Zhi)电(Dian)磁(Ci)阀(Fa)9的(De)压(Ya)力(Li)继(Ji)电(Dian)器(Qi)9ZJ工(Gong)作(Zuo)不(Bu)良(Liang).

通(Tong)过(Guo)对(Dui)上(Shang)述(Shu)元(Yuan)件(Jian)的(De)检(Jian)查(Cha),(?)发(Fa)现(Xian)电(Dian)磁(Ci)阀(Fa)5F不(Bu)动(Dong)作(Zuo),(?)并(Bing)用(Yong)总(Zong)成(Cheng)替(Ti)换(Huan)法(Fa)做(Zuo)试(Shi)验(Yan),(?)其(Qi)阀(Fa)仍(Reng)不(Bu)动(Dong)作(Zuo)。(?)这(Zhe)说(Shuo)明(Ming)故(Gu)障(Zhang)不(Bu)在(Zai)电(Dian)磁(Ci)阀(Fa)5F,(?)而(?)是(Shi)出(Chu)在(Zai)控(Kong)制(Zhi)该(Gai)阀(Fa)的(De)电(Dian)路(Lu)上(Shang)。(?)从(Cong)电(Dian)气(Qi)原(Yuan)理(Li)图(Tu)可(Ke)知(Zhi)。(?)当(Dang)电(Dian)动(Dong)机(Ji)正(Zheng)常(Chang)运(Yun)转(Zhuan)后(Hou),(?)按(An)下(Xia)QA8,使(Shi)8ZJ, 9ZJ接(Jie)通(Tong)电(Dian)源(Yuan),(?)同(Tong)时(Shi)5F , 8F电(Dian)磁(Ci)阀(Fa)通(Tong)电(Dian),(?)系(Xi)统(Tong)背(Bei)压(Ya)上(Shang)升(Sheng)。(?)当(Dang)油(You)压(Ya)达(Da)到(Dao)9.81MPa时(Shi),(?)电(Dian)接(Jie)点(Dian)压(Ya)力(Li)表(Biao)p.的(De)触(Chu)点(Dian)通(Tong)电(Dian),(?)继(Ji)电(Dian)器(Qi)J1,吸(Xi)合(He),(?)J1-1常(Chang)闭(Bi)触(Chu)点(Dian)断(Duan)开(Kai),(?)使(Shi)9ZJ和(He)5F断(Duan)电(Dian),(?)5F恢(Hui)复(Fu)到(Dao)常(Chang)开(Kai)状(Zhuang)态(Tai),(?)1D为(Wei)无(Wu)负(Fu)荷(He)回(Hui)油(You)。(?)

当(Dang)时(Shi)按(An)下(Xia)QA8,(?)处(Chu)于(Yu)完(Wan)好(Hao)状(Zhuang)态(Tai)的(De)5F不(Bu)动(Dong)作(Zuo),(?)故(Gu)障(Zhang)一(Yi)定(Ding)出(Chu)在(Zai)控(Kong)制(Zhi)5F动(Dong)作(Zuo)的(De)压(Ya)力(Li)继(Ji)电(Dian)器(Qi)9ZJ元(Yuan)件(Jian)上(Shang)。(?)通(Tong)过(Guo)进(Jin)一(Yi)步(Bu)检(Jian)查(Cha),(?)发(Fa)现(Xian)9ZJ的(De)线(Xian)圈(Quan)烧(Shao)毁(Hui)。(?)将(Jiang)线(Xian)圈(Quan)更(Geng)换(Huan)后(Hou),(?)进(Jin)行(Xing)整(Zheng)机(Ji)试(Shi)验(Yan),(?)一(Yi)切(Qie)恢(Hui)复(Fu)正(Zheng)常(Chang)。(?)


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