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丽江华德液压泵厂家分析其磨损的原因。北京华德北京北仪兴源涛机电设备有限公司，主要生产<A style="FONT-WEIGHT: 400; FONT-SIZE: 12px; WORD-SPACING: 0px; TEXT-TRANSFORM: none; COLOR: rgb(100,100,100); TEXT-INDENT: 0px; FONT-STYLE: normal; FONT-FAMILY: 宋体, verdana, arial, helvetica, sans-serif; WHITE-SPACE: normal; LETTER-SPACING: normal; BACKGROUND-COLOR: rgb(255,255,255); TEXT-DECORATION: none; WIDOWS: 2; ORPHANS: 2; font-variant-ligatures: normal; font-variant-caps: normal; webkit-text-stroke-width: 0px" href="http://m.859823.cn/index.html" target=_blank>华德</A><A style="FONT-WEIGHT: 400; FONT-SIZE: 12px; WORD-SPACING: 0px; TEXT-TRANSFORM: none; COLOR: rgb(100,100,100); TEXT-INDENT: 0px; FONT-STYLE: normal; FONT-FAMILY: 宋体, verdana, arial, helvetica, sans-serif; WHITE-SPACE: normal; LETTER-SPACING: normal; BACKGROUND-COLOR: rgb(255,255,255); TEXT-DECORATION: none; WIDOWS: 2; ORPHANS: 2; font-variant-ligatures: normal; font-variant-caps: normal; webkit-text-stroke-width: 0px" href="http://m.859823.cn/index.html" target=_blank>液压泵</A><SPAN style="DISPLAY: inline! 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一般来说，造成动臂带载不能提升的主要原因为： a.液压泵严重磨损。在低速运转时泵内泄漏严重；高速运转时，泵压力稍有提高，但由于泵的磨损及内泄，容积效率显著下降，很难达到额定压力。液压泵长时间工作又加剧了磨损，油温升高，由此造成液压元件磨损及密封件的老化、损坏，丧失密封能力，液压油变质，然后导致故障发生。 b．液压元件选型不合理。动臂油缸规格为70／40非标准系列，密封件亦为非标准件，制造成本高且密封件更换不便。动臂油缸缸径小，势必使系统调定压力高。 c．液压系统设计不合理。操纵阀与全液压转向器为单泵串联，安全阀调定压力分16MPa，而液压泵的额定工作压力也为16MPa。液压泵经常在满负载或长时间超负荷（高压）情况下工作，并且系统有液力冲击，长期不换油，液压油受污染，加剧液压泵磨损，以致液压泵泵壳炸裂（后曾发现此类故障）。 <A href="http://m.859823.cn/ghjyu/nfyjyu/index.html" target=_blank><IMG style="BORDER-RIGHT: #c8c8c8 1px solid; PADDING-RIGHT: 2px; BORDER-TOP: #c8c8c8 1px solid; PADDING-LEFT: 2px; PADDING-BOTTOM: 2px; BORDER-LEFT: #c8c8c8 1px solid; PADDING-TOP: 2px; BORDER-BOTTOM: #c8c8c8 1px solid" height=113 src="http://m.859823.cn/upfiles/proimages/202042116321598311.jpg" width=150 border=0></A>、
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