銅仁小挖掘機租賃有哪些品牌貴州裕鑫工程機械供應-b2b網(wǎng)站_b2b電子商務平臺【買產(chǎn)品】-上?？谄蚴称酚邢薰?/title><meta name="description" content=" 挖掘機故障排除：泵柱塞與缸體“咬死”。一臺HE-280型挖掘機，大修并更換液壓泵的缸體和柱塞后，液壓泵不工作并伴有異響。拆檢發(fā)現(xiàn)，柱塞與缸體黏在一起，呈“咬死”狀態(tài)。對缸體和柱塞進行金相分析后"><meta name="keywords" content="銅仁小挖掘機租賃有哪些品牌"><link rel="canonical" href="http://www.cdcfah.com/"/><meta name="applicable-device" content="pc"><link rel="shortcut icon" href="/static/new_net_01/images/favicon.ico"><link rel="stylesheet" href="/static/new_net_01/css/slick.css" /><link rel="stylesheet" href="/static/new_net_01/css/addnew.css"><link rel="stylesheet" href="/static/new_net_01/css/sidenav.css"><link rel="stylesheet" href="/static/new_net_01/css/style.css" /><link rel="stylesheet" href="/static/new_net_01/css/tab.css"><link rel="stylesheet" href="/static/new_net_01/css/404.css"> <meta name="baidu-site-verification" content="OBVzrC9aaQ" /> <meta http-equiv="Cache-Control" content="no-transform" /> <meta http-equiv="Cache-Control" content="no-siteapp" /> 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src="https://tyunfile.71360.com/UploadFile/bm03bazx/637243593687480468/5636811.jpg" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="rlivxkm" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/bm03bazx/637243593687480468/5636811.jpg" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="gvxuryq" class="content"><p><span>需求數(shù)量：</span>0</p><p><span>價格要求：</span>面議</p><p><span>所在地：</span>貴州省</p><p><span>包裝要求：</span><span style="color: #f30;"></span></p><p><span>產(chǎn)品關(guān)鍵詞：</span>銅仁小挖掘機租賃有哪些品牌</p><p><span>***更新：</span>2020-06-07 16:12:36</p><p><span id="click" >瀏覽次數(shù)：0次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="pzgifry" class="rightbox"><h3>公司基本資料信息</h3><p style="border:0;"><a rel="nofollow">貴州裕鑫工程機械有限公司</a></p><p><span>聯(lián)系人：</span>余濤</p><p><span>郵箱: </span>3623794418@qq.com</p><p><span>電話: </span>15692715256</p><p><span>傳真: </span>0851_</p><p><span>網(wǎng)址: </span></p><p><span>手機: </span>0851-85167915</p><p><span>地址: </span>貴州省貴安新區(qū)大學城（黨武鎮(zhèn)）貴安數(shù)字經(jīng)濟產(chǎn)業(yè)園7號樓409</p><p>[當前離線] <a rel="nofollow"> [加為商友] </a><a rel="nofollow"> [發(fā)送信件] </a></p></div></div><div id="mbyvnub" class="page-proshow02"><p class="title">詳細說明</p><div id="ixpro3h" class="box"><p><p> 挖掘機故障排除：泵柱塞與缸體“咬死”。一臺HE-280型挖掘機，大修并更換液壓泵的缸體和柱塞后，液壓泵不工作并伴有異響。拆檢發(fā)現(xiàn)，柱塞與缸體黏在一起，呈“咬死”狀態(tài)。對缸體和柱塞進行金相分析后，確認是殘余奧氏體轉(zhuǎn)變成馬氏體，溫度越低，轉(zhuǎn)變量越大。在寒冷季節(jié)，殘余轉(zhuǎn)變在很短的時間內(nèi)即完成，致使柱塞因其體積瞬間增大而出現(xiàn)“咬死”現(xiàn)象。為此，可用**量具測量出液壓泵缸體和柱塞在室溫下的配合間隙；將缸體和柱塞分別進行冷處理，即放在-50～-60℃的地方，30min后取出；用磨床對柱塞進行磨削加工至室溫時的配合尺寸；對柱塞表面進行激光淬火；用金屬**拋光膏對柱塞表面再進行拋光處理，裝復后故障排除。貴州裕鑫工程機械有限公司是具有完善的施工隊及專業(yè)的維修隊伍。主營：挖掘機的整機租賃、土石方工程，銅仁小挖掘機租賃有哪些品牌，等業(yè)務。常年對外出租，價格公道，銅仁小挖掘機租賃有哪些品牌，誠實守信，合作共贏；租用方式靈活、包月，銅仁小挖掘機租賃有哪些品牌、計時、按臺班均可。承接：大小土石方工程，歡迎咨詢洽談。<span style="display:none;"></span> </p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="銅仁小挖掘機租賃有哪些品牌" src="https://tyunfile.71360.com/UploadFile/bm03bazx/637243593687480468/5636811.jpg"></div><p style="text-indent:25px">挖掘機故障排除：不能回轉(zhuǎn)及回轉(zhuǎn)角度偏大。貴州挖掘機除回轉(zhuǎn)外其他部件運轉(zhuǎn)正常，因為主泵和自壓減壓閥為挖掘機液壓部分的共用元件，故說明主泵和自壓減壓閥不存在故障。在回轉(zhuǎn)電磁閥控制油路的出口處，接一個三通接頭并連接一只量程4MPa的壓力表，操作挖掘機進行回轉(zhuǎn)，結(jié)果發(fā)現(xiàn)此處的壓力*為O.1MPa，說明解除制動的油壓太低，無法解除制動，從而使挖掘機不能回轉(zhuǎn)。在拆卸回轉(zhuǎn)鎖定電磁閥時發(fā)現(xiàn)，閥芯已被卡住，取出閥芯時看見里面有一小段破損的O形密封圈。清洗各元件，重新安裝后試機，回轉(zhuǎn)動作恢復正常，故障排除。挖掘機回轉(zhuǎn)操作結(jié)束，操作手柄已處于中位時，挖掘機在慣性力的作用下回轉(zhuǎn)角偏大，無法停在預定位置。據(jù)分析，這種象是由于回轉(zhuǎn)制動不及時或制動力不足造成的，它與解除制動的油壓大小及回轉(zhuǎn)鎖定磁閥、回轉(zhuǎn)制動片和制動密封等零部件有關(guān)。在檢查制動回油路時發(fā)現(xiàn)，在回油路的節(jié)流孔處有一膠質(zhì)顆粒物，節(jié)流孔雖沒有完全被堵死，但已導致回油過慢，使得制動部分起作用的時間推遲，因此使上部回轉(zhuǎn)停止時滑移量（即回轉(zhuǎn)角度）過大。清洗各元件特別是節(jié)流孔及細小油道。安裝各元件后試機時，回轉(zhuǎn)滑移量已在規(guī)定的范圍內(nèi)，故障排除。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="銅仁小挖掘機租賃有哪些品牌" src="https://tyunfile.71360.com/UploadFile/bm03bazx/637243593666777343/5620861.jpg"></div><p> 引起挖掘機輸入油缸的功率減小的原因有：1油泵的影響根據(jù)油缸內(nèi)的活塞移動速度與進入油缸油液的工作流量成正比關(guān)系，如果液壓油泵輸出的流量減少，必然會使大臂油缸舉升緩慢。進而分析，油泵的實際流量等于油泵的理論流量與總效率的乘積（油泵容積效率與機械效率之和）如果油泵的總效率減小，則油泵實際流量也必然在減小。使油泵總效率減小的主要原因是:油泵泄漏量增大和機械摩擦損失增大。2油缸的影響液壓油缸活塞密封圈損壞、油缸拉傷、油缸蓋密封圈損壞而引起油液竄腔或漏油，使油缸內(nèi)的容積效率減小，即油缸本身效率減小，故輸出的功率減小，其表現(xiàn)為動臂舉升速度緩慢。3油路泄漏的影響油泵的吸程段（油泵至油箱）管路密封不良而吸入空氣，影響泵油效率；油泵至油缸的壓程段向系統(tǒng)外漏油或通過操縱閥漏回油箱，均會使進入油缸的油液流量減小，壓力降低，導致動臂舉升緩慢。4油路堵塞的影響液壓系統(tǒng)的工作油液一般會有機械雜質(zhì)，這些雜質(zhì)在油路中的流油載面小的部位堵塞，使進入油缸油液流量減小，同時還會引起壓力降低。因此，致使油缸輸出功率減小而使大臂舉升緩慢。貴州裕鑫工程機械有限公司是具有完善的施工隊及專業(yè)的維修隊伍，歡迎咨詢洽談。 </p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="銅仁小挖掘機租賃有哪些品牌" src="https://tyunfile.71360.com/UploadFile/bm03bazx/637243593665361328/1936687.jpg"></div></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/181040.html</p></div></div></div></div></div><div id="z8zgn7v" 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