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<li>¾|‘址åQ?a href="http://www.vsivva.tw" rel="nofollow">www.vsivva.tw</a></li> <li>厂址åQšé‡åº†å¸‚九龙坡区白市驿净龙工业园åŒ?/li> </ul> </div> </div> <div class="fr insRight"> <div class="crumb font_w fs14"> <b class="fl"><a href="/">首页</a> > <a href="/news/wxjswd/">¾l´ä¿®æŠ€æœ¯æ–‡æ¡?/a> > 详细内容</b> </div> <div class="insNewsArti clearfix pt10 font_w"> <h1 class="tac fs20">ž®æ¾PC200-3型挖掘机工作无力故障的排é™?/h1> <h3 class="tac"><span>来源åQ?script data-cfasync="false" src="/cdn-cgi/scripts/5c5dd728/cloudflare-static/email-decode.min.js"></script><script>document.write('<a href="' + window.location.href + '">'+ window.location.href + '</a>');</script></span><span>发布旉™—´åQ?020-04-02</span></h3> <div class="con mt10 fs14"> <p><span>    </span><strong><a target="_blank" >ž®æ¾PC200-3型挖掘机工作无力故障的排é™?/a></strong><br /> <span>    有一台小松PC200-3型挖掘机出现工作无力、动作缓慢及发动机声音不正常的故障症状ã€?/span><br /> <span>    下面介绍对该机液压系¾lŸåŠå‘动æœø™¿›è¡Œæ£€‹¹‹å’Œ¾l´ä¿®çš„过½E‹ã€?/span><br /> <span>    一、液压系¾lŸçš„‹‚€‹¹?/span><br /> <span>    1、用压力表检‹¹‹ä¸¤ä¸ÀL¶²åŽ‹æ܇的压åŠ?/span><br /> <span>    (1)‹¹‹åŽä¸ÀL܇压力。后ä¸ÀL܇ž®†æ¶²åŽ‹æÑa供给四联阀,该四联阀分别控制左行走、动臂、铲斗及斗杆臂的动作。利用铲斗çŽ×“憋油”测出后ä¸ÀL܇压力ä¸?6MPa。此时调整四联阀的主溢流阀,表压òq¶æ— å˜åŒ–。经分析,造成压力不èƒö(标准压力å€égؓ32MPa)的原因可能有:</span><br /> <span>    后主æ³üc€å››è”阀ä¸ÀLº¢‹¹é˜€ã€å››è”阀或铲斗çŽ×½{‰æœ‰æ•…障。按“先易后难、先½Ž€åŽç¹â€çš„原则,先拆‹‚€å››è”阀上的ä¸ÀLº¢‹¹é˜€,发现其上主阀心四周均已拉伤。用1000åïL ‚¾U¸æ‰“¼‚¨åŽ,清洗装复。再‹¹‹è¯•æ—?后主泵压力已升至31MPa,但比标准å€ÆD¿˜å·?MPa,为排除铲斗çŽ×内泄而造成压力å€ég¸å‡†çš„å› ç´ ,又对铲斗¾~¸è¿›è¡Œäº†å†…泄‹¹‹è¯•,卛_œ¨é“²æ–—¾~¸å…¨ä¼¸æˆ–全羃状态下,拆下油管回æÑa端èÊY½Ž?要堵住与回æÑa端èÊY½Ž¡ç›¸˜qžçš„另一ç«?。经观察未见有æÑa液流å‡?故可判定仅是后主泉|ˆ–四联阀有故障ã€?/span><br /> <p>     (2)‹¹‹å‰ä¸ÀL܇压力。前ä¸ÀL܇ž®†æ¶²åŽ‹æÑa供给五联阀,该五联阀分别控制回è{、动臂、斗杆及双™¡Œèµ°çš„动作。当用回转插销固定上èžR再操¾Uµå›žè½¬æ—¶,压力表显½Cºå€égؓ22MPa(标准å€égؓ32MPa,该五联阀的主溢流阀和四联阀的主溢流阀均已‹‚€ä¿®è¿‡äº?。造成前主泵压力低的原因可能是前主æ³?五联阀及回转马辄¡­‰æœ‰æ•…障。äؓ½Ž€åŒ–测è¯?ž®†å‰ä¸ÀL܇和后ä¸ÀL܇的出油管互换,卛_°†å‰ä¸»æ³ëŠš„油供¾l™å››è”阀,仍通过铲斗¾~¸æ¥‹‚€‹¹‹å‰ä¸ÀL܇压力,¾l“æžœ‹¹‹å¾—压力å€ég»ä¸?2MPa,由此可判定前ä¸ÀL܇有故障ã€?</p> <p> <img src="http://www.vsivva.tw/uploads/image/20200402/20200402095630_3798.png" alt="ž®æ¾PC200-3型挖掘机工作无力故障的排é™? width="342" height="262" title="ž®æ¾PC200-3型挖掘机工作无力故障的排é™? align="" /> </p> <span>    2、检‹¹‹æ–—杆çŽ×和动臂çŽ×的内æ³?/span><br /> <span>    工作机构无力的原因除ä¸ÀL܇压力不èƒöå¤?液压¾~¸å†…泄也会造成工作无力,故仍采用‹‚€‹¹‹é“²æ–—çŽ×内泄的方法分别对斗杆¾~¸å’ŒåŠ¨è‡‚¾~¸è¿›è¡Œäº†‹¹‹è¯•ã€‚结果发现斗杆çŽ×内泄严重ã€?/span><br /> <span>    通过以上å¯ÒŽ¶²åŽ‹ç³»¾lŸçš„‹‚€‹¹‹å‘çŽ?在相同的‹‚€‹¹‹æ¡ä»¶ä¸‹,前、后ä¸ÀL܇的压力值相差约30%,由此判定ä¸ÀL¶²åŽ‹æ܇有故障。解体前、后ä¸ÀL܇,发现前主泵配油盘与çŽ×体配合面¼‚¨æŸä¸¥é‡:斜盘与滑靴接触面圆周上以及后ä¸ÀL܇配æÑa盘与¾~怽“配合面也都有¼‚¨æŸã€?/span><br /> <span>    拆检斗杆¾~?发现‹zÕd¡žå¯†å°ä»¶å·²æŸåã€‚活塞头上装¾l„合密封的沟槽已开裂。于æ˜?更换了前ä¸ÀL܇配æÑa盘、柱塞、柱塞çŽ×和斜ç›?以及斗杆¾~¸çš„‹zÕd¡žåŠå¯†ž®äšg½{‰ã€?/span><br /> <span>    二、发动机的检æŸ?/span><br /> <span>    发动机的故障表现ä¸?挖掘机在无负载工况下无故障现è±?当略带负载时,发动æœø™{速立即下é™?此时在æÑaé—?,òq¶ä¸”排出‹¹“浓的黑çƒ?发动机的声音也变得发闗÷€‚此症状表明,该发动机功率不èƒö。鉴于该发动æœø™“v动正å¸?òq¶ä¸”烧机油和½Hœæ°”的现象åƈ不严é‡?因而判定该故障是因供气不èƒö或供油不­‘³é€ æˆçš„。于æ˜?æ ¡æ­£å–ähÑaæ³µåƈ拆检½Iºæ°”滤清å™?¾l“果发现滤心上积有大量灰ž®˜ã€‚决定换æ–îCšgã€?/span><br /> <span>    ¾læ£€ä¿®æ¶²åŽ‹ç³»¾lŸä¸Žå‘动机后,该挖掘机工作无力的故障即被排除ã€?/span></p><br /> </div> <div class="newArtiNext mt10"><div>上一æ?<a href="316.html"> 日立挖机出现无力、液压系¾lŸçš„时候你ž®Þp¦ž®å¿ƒäº†ï¼Ÿ</a></div> <div>下一æ?<a href="314.html">挖掘机维修_卡特挖掘机憋车故障诊断方法故障分析 </a></div> </div> <div class="tag">相关标签åQ?a href="/download/">挖掘机维ä¿?/a>,<a href="/news/wjjwx">挖掘æœÞZ¿®ç?/a>,<a href="/about/about5.html">挖掘机维修厂</a></div> <div class="crumb mt15"> <span class="fl font_w fb fs22">相关新闻<b class="fs14 fn font_i ml5">RELATED NEWS</b></span> </div> <div class="insNews1 clearfix pt10 fs14 font_w"> <ul> <li><a href="/news/326.html" rel="nofollow">挖掘机维修_æ³ëŠš„历史和分¾c Z€”—液压基¼‹€çŸ¥è¯†ä¹‹ä¸€</a><span>2020-07-20</span></li> <li><a href="/news/325.html" 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