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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?018-12-25</span></h3> <div class="con mt10 fs14"> <p><p style="color:#343434;font-family:"font-size:14px;background-color:#FFFFFF;"> <a href="http://www.tegoudian.com/" target="_blank">重庆挖掘机维ä¿?/a><span>发动机温度高和掉臂问é¢?/span><br /> <span>  则要查明故障问题来源。其中有两处™åÀL³¨æ„ï¼Œä¸€æ˜¯æ¶²åŽ‹æ܇åQ›æ¶²åŽ‹æ܇的金属屑可以在æÑa泵下面的¼‚é“æ”¾æÑa塞中扑ֈ°åQŒå¦‚有,则说明æ܇已磨损,必要时应拆卸修理。二是液压çŽ×½{’ï¼›¾~¸ç­’内壁和活塞杆头部常承受突然变化的冲击压力åQŒå‘动机高温修理故易出现问题。此机的故障ž®±æ˜¯ç”׃ºŽé“²æ–—¾~¸ç­’内壁被拉伤后åQŒå…¶ä¸Šå‰¥è½çš„金属屑卡在阀A中造成的。æ€ÖM¹‹åQŒè‹¥æ¶²åŽ‹¾pȝ»Ÿå‡ºçŽ°äº†é‡‘属屑或杂物,™åÀL‰¾å‡ºæ ¹æºä¹‹æ‰€åœ¨ã€?/span> </p> <p style="color:#343434;font-family:"font-size:14px;background-color:#FFFFFF;">   一般情况下åQŒç”±äºŽå›žè½¬ä¸»æŽ§åˆ¶é˜€çš„阀芯与阀孔间的配合极其精密,加上又有æ²ÒŽ¶¦æ»‘,一般不易äñ”生磨损情况,杂物隑֍¡åœ¨å…¶ä¸­ï¼Œå› è€Œåœ¨æœªç¡®å®šæ•…障点前,不要随便拆卸阀芯。因为阀芯与阀孔中存有油膜åQŒé˜€èŠ¯ä¸æ˜“拔出,此时往往误认ä¸ø™¢«æ‚物卡住了,因而采用了强制的方法,˜q™æ ·å®ÒŽ˜“损伤阀芯表面;再则åQŒç”±äºŽå¤šæ•°æƒ…冉|˜¯åœ¨æ–½å·¥çŽ°åœÞZ¿®ç†ï¼Œé‡æ–°è£…配旉™š¾ä»¥ä¿è¯é˜€å‘¨å›´çŽ¯å¢ƒçš„清‹zï¼Œå› è€Œæ˜“出现杂物卡在其中的现象。挖掘机无回转故障的原因分析及处理,发现回è{无动作,而其他动作均正常ã€?</p> <p style="color:#343434;font-family:"font-size:14px;background-color:#FFFFFF;">   发动机高温修理当操作手柄¾|®äºŽå›žè{位置æ—Óž¼ŒæŽ§åˆ¶æ²¹åˆ°è¾¾æŽ§åˆ‰™˜€åQŒæŽ¨åŠ¨å›žè½¬é˜€æ†ä‹É后工作æÑa泉|ä¾›çš„高压油进人回转马达;同时åQŒæŽ§åˆ¶æÑa回æÑa½ŽÞqš„æ²¹èµ\被切断,使制动松开阀的压力增加,推动光™˜€æ†ä‹É另一路辅助压力æÑa˜q›äh制动‹zÕd¡žåQŒæ‰“开回è{制动装置åQŒä‹É回è{马达动作åQ›å›žè½¬é©¬è¾ùN€šè¿‡å˜é€Ÿå™¨çš„小齿轮输出动力åQŒå°é½¿è½®ä¸Žå›žè½¬é‹É圈啮合而äñ”生回转动作ã€?</p> <p style="color:#343434;font-family:"font-size:14px;background-color:#FFFFFF;">   分析和检查从回è{机构的工作原理知åQŒäñ”生故障的原因有三个方面,即主工作油èµ\机械传动和控制æÑa路部分。主工作油èµ\的检查如果回转主油èµ\压力较低åQŒå‘动机高温修理ž®†ä¸èƒ½äñ”生回转动作。测量主工作油èµ\¾pȝ»Ÿçš„压力,在后工作æ²ÒŽÜ‡åŽ‹åŠ›å‡ºå£å¤„有一内六角æÑa堵,拆下后装上压力表åQŒæ“ä½œå›žè½¬æ‰‹æŸ„,ž®†æŸ´æ²ÒŽœºåŠ é€Ÿï¼Œ¾læµ‹é‡åŽ‹åŠ›è¾¾ã€‚MPaåQŒäؓ¾pȝ»Ÿçš„正常工作压力,说明ä¸Õd·¥ä½œæÑa路各液压元äšg均正常ã€?</p> <p style="color:#343434;font-family:"font-size:14px;background-color:#FFFFFF;text-align:center;"> <img src="http://www.tegoudian.com/uploads/image/20181023/20181023103558_4687.png" alt="挖掘机维ä¿? width="500" height="373" title="挖掘机维ä¿? align="" /> </p> <p style="color:#343434;font-family:"font-size:14px;background-color:#FFFFFF;">   传动部分的检查回转马辑ְ†åŠ¨åŠ›¾lå˜é€Ÿå™¨çš„小齿轮输出åQŒå°é½¿è½®¾l•å›žè½¬é‹É圈旋转,在这一动力输出的过½E‹ä¸­åQŒå¦‚果相互啮合的齿轮受卡åQŒä¹Ÿä¼šäñ”生无回è{动作。一般é‹É轮啮合不正常都会有异响äñ”生,现驾驶员在操作中没有听到回è{有异响,所以机æ¢îC¼ åŠ¨æ•…障可以暂且排除在外ã€?</p> <p style="color:#343434;font-family:"font-size:14px;background-color:#FFFFFF;">   控制油èµ\的检查由于该挖掘机其他动作均正常åQŒè¯´æ˜Žæä¾›æŽ§åˆ¶æÑa压的辅助æ²ÒŽÜ‡å·¥ä½œæ­£å¸¸ã€‚回转动作的控制油èµ\有条åQŒå³æŽ§åˆ¶å›žè{阀杆制动松开阀和进人停车制动活塞的油èµ\。具体分析如下,操作回è{手柄æ—Óž¼Œè§¦æ‘¸å›žè{马达压力油管时有较强的æÑa‹¹æ„ŸåQŒè¯´æ˜Žä¸»å·¥ä½œåŽ‹åŠ›æ²¹å·²åˆ°è¾¾å›žè{马达åQŒæŽ§åˆ‰™˜€çš„回转阀杆能正常打开åQŒæŽ§åˆ¶æÑa路工作正常。测量至停èžR制动‹zÕd¡žçš„æÑa压ã€?</p> <span style="color:#343434;font-family:"font-size:14px;background-color:#FFFFFF;">发动机水½Ž×ƒ¸²æ²?/span><br /> <span style="color:#343434;font-family:"font-size:14px;background-color:#FFFFFF;">  因喷æ²ÒŽÜ‡çš„供油电¼‚é˜€æœ‰æ¯›ç—?而è“v动不了柴æ²ÒŽœº.后来更换了一个新的供油电¼‚é˜€å?柴æÑaæœø™ƒ½™åºç•…起动着火作ä¸?但不久发现速度昄¡€ä¸‹é™.停机‹‚€æŸ?向增æ²ÒŽ–¹å‘渐渐扳动喷æ²ÒŽÜ‡ä¸Šçš„操作è‡?柴æÑaæœø™{速能够åã^½EŒ™¿›æ­?但是当柴æ²ÒŽœºè½¬é€Ÿå¢žè‡Œ™¿‘1600r/minæ—?再向增æÑa方向持箋扛_Š¨æ“ä½œè‡‚æ—¶,柴æÑaæœø™{速不但不˜q›æ­¥,反而有所下降.òq‰™šä¹‹å‘ˆçŽîCº†æŸ´æÑaæœø™{速不½E?忽高忽低,柴æÑa机排气管也跟着转速的动摇向外排黑çƒ?当急速扳动喷æ²ÒŽÜ‡ä¸Šçš„操作臂时,柴æÑaæœø™{速只能到è¾?500r/min,不再上升.且è{速依然忽高忽ä½?排气½Ž¡ä¾ç„¶å‘外冒黑烟.通过屡次试验,均是如此表象.</span><br /> <span style="color:#343434;font-family:"font-size:14px;background-color:#FFFFFF;">  拆检柴æÑa机时创é€?½W¬â…¡¾~¸å’Œ½W¬â…¤¾~¸çš„å–ähÑa器附˜q‘有很多砂眼,因äؓ发动æœÞZ½œä¸šæ—¶æŸ´æÑa压力大于水的压力,水不能往å–ähÑa器附˜q‘的柴æÑa道中‹¹?因而柴油就˜q›è¿›äº†æ°´½Ž?ⅡçŽ×å–ähÑa器推杆的™å‰™ƒ¨¼„Žäº†å’ŒV¾~¸å–·æ²¹å™¨çš„推杆弯äº?致ä‹ÉⅡ、Ⅴ¾~¸å–·æ²¹å™¨æŽ¨æ†çš„升½E‹æ”¹å?不能准确åœîC¾›æ²?致ä‹É柴æÑa不能完好焚烧而流到æÑa底壳ä¸?别的,ž®†PT泉|–­æ²šw˜€ä¸Šçš„出æÑa½Ž¡æ‹†ä¸‹åŽ,创造仍有柴油从断æÑa阀口流å‡?清洁阀芯后柴æÑa不再渗出;一èµ?调换了新的çŽ×盖和推杆å?毛病表象打消.</span><br /> <span style="color:#343434;font-family:"font-size:14px;background-color:#FFFFFF;">  柴æÑa仍可循着下列道èµ\˜q›è¿›æ²¹åº•å£?油箱→æÑa½Ž¡â†’PT齿轮泵→断æÑa阀→æÑa½Ž¡â†’å–ähÑa器→焚烧室→油底å£?å–ähÑa器孔˜q‡å¤§ã€æŸä¼¤æˆ–å–ähÑa器凹å‡æ€¸¤é“O形密ž®åœˆæŸåæ—?柴æÑa都会˜q›è¿›ç„šçƒ§å®?¾l§è€Œæ¸—˜q›æÑa底壳;PT燃æÑa体系的回æ²ÒŽ­§½Ž¡ä¸Šçš„单向阀失效æ—?柴æÑa会通过它流到喷油器后渗˜q›æÑa底壳òq?柴æÑa½Ž±å‡ºå£å¤„安有一个手动截止阀,假设阀芯损坏、关闭不ä¸?柴æÑa也会‹¹è¿›ç„šçƒ§å®?˜q›è¿›æ²¹åº•å£?某个气çŽ×压力太低,形成该çŽ×不作ä¸?使柴æ²ÒŽµ˜q›æÑa底壳;柴æÑaæœø™¿›æ°”缺ä¹?焚烧不安å…?柴æÑa会沿着¾~¸å£‹¹è¿›æ²¹åº•å£Ÿë€?/span><br /> <div 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