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class="tac"><span>来源åQ?script>document.write('<a href="' + window.location.href + '">'+ window.location.href + '</a>');</script></span><span>发布旉™—´åQ?022-09-10</span></h3> <div class="con mt10 fs14"> <p><strong><a target="_blank" ><a target="_blank">¼œžé’¢æ¶²åŽ‹æŒ–掘机回转无力故障的排除</a></a></strong><br /> 一、回转液压回路的特点<br /> 1.U型中位滑阀æœø™ƒ½<br /> 因回转机构的转动惯量较大åQŒäؓ防止回è{驱动油èµ\产生˜q‡é«˜å³°å€¼åŽ‹åŠ›ï¼Œå…¶æ¢å‘阀一般行使U型中位滑阀功能åQŒåœ¨å·¥ä½œçŠ¶æ€ä¸‹å½¢æˆä¸¤å¤„òq¶è”的密ž®å¸¦åQŒæ•…滑阀的磨损对泄漏的媄响比其他¾cÕdž‹çš„滑阀大ã€?br /> 2.M向补沚w™åŽ‹å›žè·?br /> <p> 为避免上车惯性回转时åQŒä½ŽåŽ‹ä¾§äº§ç”Ÿè¾ƒé«˜çœŸç©ºåº¦ï¼Œä»Žè€Œåœ¨æ¶²åŽ‹æ²¹ä¸­æžå‡ºæ°”体åQŒä¸¤å·¥ä½œæ²¹èµ\上均设有补æÑa阀åQŒä»¥ä¿è¯å›žèµ\工作½E›_®šåQŒå› ä¸¤å·¥ä½œæÑa路完全对¿UŽÍ¼Œæ•…设两个插装式先导限压阀以限制两支èµ\高工作压力ã€?</p> <p> <img src="/uploads/image/20220910/20220910181513_0777.jpg" alt="" /> </p> 二、回转无力的原因<br /> 液压故障发生的原因要从整个系¾lŸä¸­åŽÕdˆ†æžæ£€æŸ¥ï¼Œé€ æˆæŒ–掘机回转无力的原因可能有:<br /> R泵马辑֒Œæ¢å‘阀的磨损,回æÑaé˜ÕdŠ›˜q‡å¤§åQŒå›žè½¬æœºæž„运动阻力过大和伺服操纵压力˜q‡ä½Ž½{‰ï¼Œç„¶è€Œå¯èƒ½å‘生的原因却是如下两方面:<br /> 1.è¡¥æÑa阀¼‚¨æŸ<br /> è¡¥æÑa阀ç”׃ºŽ¾lå¸¸å¯é—­åQŒé˜€åº§é˜€å¿ƒä¹‹é—´ä¼šäº§ç”ŸæŒ¤åŽ‹å˜åŞ和磨损,其磨损åŞ态类ä¼égºŽå‘动机的气门锥面åQŒä¸”以阀心锥面的¼‚¨æŸä¸ÞZ¸»åQŒç£¨æŸåŽçš„阀心阀座会造成回èµ\非补油状态(即驱动状态)的密ž®æ€§ä¸‹é™ï¼Œå·¥ä½œåŽ‹åŠ›æ²¹ä»Žè¡¥æÑa阀泄漏åQŒä»Žè€Œå¯¼è‡´å›žè½¬æ— åŠ›ï¼Œç”šè‡³ä¸èƒ½å›žè{ã€?br /> 2.限压阀é˜Õd°¼å­”å µå¡?br /> <p> 一般回转æÑa路的调定压力较系¾lŸå…¶ä»–压力低åQŒä¸»è¦ä¸Žæ¶²åŽ‹é©¬è¾¾çš„额定压力有养I¼Œä¹Ÿè¿œä½ŽäºŽä¸ÀL܇额定压力åQŒæ‰€ä»¥å›žè½¬æÑa路的限压阀是经常开启的。限压阀的经常开启,一斚w¢ä¼šå¼•èµ·é˜€å¿ƒé˜€å¥—çš„¼‚¨æŸåQŒå¦ä¸€æ–šw¢æ²ÒŽ¶²ä¸­çš„杂质会造成阀心阻ž®¼å­”的堵塞。阻ž®¼å­”堵塞后,限压阀的开启压力完全由主阀心回位弹½§çš„预紧力所军_®šã€‚该预紧力的大小仅能满èƒö克服阀心的摩擦力和液动力,不能驱动回è{马达ã€?</p> <p> <img src="/uploads/image/20220910/20220910181532_4096.jpg" alt="" /> </p></p><br /> </div> <div class="newArtiNext mt10"><div>上一æ?<a href="421.html">¼œžé’¢æ¶²åŽ‹æ•…障的判断和排除</a></div> <div>下一æ?<a href="419.html">挖掘机动臂断¾l­ä¸‹é™çš„故障现象及原因分æž?/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> 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