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<p class="MsoNormal" align="center" style="MARGIN: 0cm 0cm 0pt; LINE-HEIGHT: 150%; TEXT-ALIGN: center;"><b style="mso-bidi-font-weight: normal;"><span lang="EN-US" style="FONT-SIZE: 15pt; LINE-HEIGHT: 150%;"><p><font face="Times New Roman"> </font></p></span></b></p><p class="MsoNormal" align="center" style="MARGIN: 0cm 0cm 0pt; LINE-HEIGHT: 150%; TEXT-ALIGN: center;"><b style="mso-bidi-font-weight: normal;"><span style="FONT-SIZE: 15pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman';">伺服阀的故障、原因及排除</span></b><b style="mso-bidi-font-weight: normal;"><span lang="EN-US" style="FONT-SIZE: 15pt; LINE-HEIGHT: 150%;"><p></p></span></b></p><p class="MsoNormal" align="center" style="MARGIN: 0cm 0cm 0pt; LINE-HEIGHT: 150%; TEXT-ALIGN: center;"><b style="mso-bidi-font-weight: normal;"><span lang="EN-US" style="FONT-SIZE: 14pt; LINE-HEIGHT: 150%;"><p><font face="Times New Roman"> </font></p></span></b></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 150%; mso-char-indent-count: 2.0;"><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman";">伺服阀的故障常常在电液伺服系统调试或工作不正常情况下发现的。所以这里有时是系统问题包括放大器、反馈机构、执行机构等故障，有时确是伺服阀问题。所以首先要搞清楚是系统问题、还是伺服阀问题。解决这疑问的常用办法是：一、有条件的将阀卸下，上实验台复测一下即可。二、大多数情况无此</span><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%;"><font face="Times New Roman">
</font></span><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman";">条件，这时一个简单的办法是将系统开环，备用独立直流电源、经万用表再给伺服阀供正负不同量值电流，从阀的输出情况来判断阀是否有毛病，是什么毛病。阀问题不大，再找系统问题，例如：执行机构的内漏过大，会引起系统动作变慢，滞环严重、甚至不能工作；反馈信号断路或失常等等，放大器问题有输出信号畸变或不工作，系统问题这里不祥谈，下面主要谈谈阀的故障。</span><span lang="EN-US" style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%;"><p></p></span></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 150%; tab-stops: 356.25pt; mso-char-indent-count: 2.0;"><span lang="EN-US" style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%;"><font face="Times New Roman"><span style="mso-tab-count: 1;"> </span><p></p></font></span></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; LINE-HEIGHT: 150%;"><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman";">（</span><span lang="EN-US" style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%;"><font face="Times New Roman">1</font></span><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman";">）阀不工作</span><span lang="EN-US" style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%;"><p></p></span></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; LINE-HEIGHT: 150%;"><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman";">原因有：马达线圈断线，脱焊；还有进油或进出油口接反。再有可能是前置级堵塞，使得阀芯正好卡在中间死区位置，阀芯卡在中间位置当然这种几率较少。马达线圈串联或并联两线圈接反了，两线圈形成的磁作用力正好抵消。</span><span lang="EN-US" style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%;"><p></p></span></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; LINE-HEIGHT: 150%;"><span lang="EN-US" style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%;"><p><font face="Times New Roman"> </font></p></span></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; LINE-HEIGHT: 150%;"><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman";">（</span><span lang="EN-US" style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%;"><font face="Times New Roman">2</font></span><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman";">）阀有一固定输出，但已失控</span><span lang="EN-US" style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%;"><p></p></span></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; LINE-HEIGHT: 150%;"><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman";">原因：前置级喷嘴堵死，阀芯被赃物卡着及阀体变形引起阀芯卡死等，或内部保护滤器被赃物堵死。要更换滤芯，返厂清洗、修复。</span><span lang="EN-US" style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%;"><p></p></span></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; LINE-HEIGHT: 150%;"><span lang="EN-US" style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%;"><p><font face="Times New Roman"> </font></p></span></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; LINE-HEIGHT: 150%;"><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman";">（</span><span lang="EN-US" style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%;"><font face="Times New Roman">3</font></span><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman";">）阀反应迟钝、响应变慢等</span><span lang="EN-US" style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%;"><p></p></span></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; LINE-HEIGHT: 150%;"><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman";">原因：有系统供油压力降低，保护滤器局部堵塞，某些阀调零机构松动，及马达另部件松动，或动圈阀的动圈跟控制阀芯间松动。系统中执行动力元件内漏过大，又是一个原因。此外油液太脏，阀分辨率变差，滞环增宽也是原因之一。</span><span lang="EN-US" style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%;"><p></p></span></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; LINE-HEIGHT: 150%;"><span lang="EN-US" style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%;"><p><font face="Times New Roman"> </font></p></span></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; LINE-HEIGHT: 150%;"><span lang="EN-US" style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%;"><p><font face="Times New Roman"> </font></p></span></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; LINE-HEIGHT: 150%;"><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman";">（</span><span lang="EN-US" style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%;"><font face="Times New Roman">4</font></span><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman";">）系统出现频率较高的振动及噪声</span><span lang="EN-US" style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%;"><p></p></span></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; LINE-HEIGHT: 150%;"><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman";">原因：油液中混入空气量过大，油液过脏；系统增益调的过高，来自放大器方面的电源噪音，伺服阀线圈与阀外壳及地线绝缘不好，是通非通，颤振信号过大或与系统频率关系引起的谐振现象，再则相对低的系统而选了过高频率的伺服阀。</span><span lang="EN-US" style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%;"><p></p></span></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; LINE-HEIGHT: 150%;"><span lang="EN-US" style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%;"><p><font face="Times New Roman"> </font></p></span></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; LINE-HEIGHT: 150%;"><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman";">（</span><span lang="EN-US" style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%;"><font face="Times New Roman">5</font></span><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman";">）阀输出忽正忽负，不能连续控制，成“开关”控制。</span><span lang="EN-US" style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%;"><p></p></span></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; LINE-HEIGHT: 150%;"><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman";">原因：伺服阀内反馈机构失效，或系统反馈断开，不然是出现某种正反馈现象。</span><span lang="EN-US" style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%;"><p></p></span></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; LINE-HEIGHT: 150%;"><span lang="EN-US" style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%;"><p><font face="Times New Roman"> </font></p></span></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; LINE-HEIGHT: 150%;"><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman";">（</span><span lang="EN-US" style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%;"><font face="Times New Roman">6</font></span><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman";">）漏油</span><span lang="EN-US" style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%;"><p></p></span></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; LINE-HEIGHT: 150%;"><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman";">原因：安装座表面加工质量不好、密封不住。阀口密封圈质量问题，阀上堵头等处密封圈损坏。马达盖与阀体之间漏油的话，可能是弹簧管破裂、内部油管破裂等。</span><span lang="EN-US" style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%;"><p></p></span></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18pt; LINE-HEIGHT: 150%; mso-char-indent-count: 1.5;"><span lang="EN-US" style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%;"><p><font face="Times New Roman"> </font></p></span></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18pt; LINE-HEIGHT: 150%; mso-char-indent-count: 1.5;"><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman";">伺服阀故障排除，有的可自己排除，但许多故障要将阀送到生产厂，放到实验台上返修调试，再强调一遍：不要自己拆阀，那是很容易损坏伺服阀零部件的。</span><span lang="EN-US" style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%;"><p></p></span></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; LINE-HEIGHT: 150%;"><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman";">用伺服阀较多的单位可以自己装一个简易实验台来判断是系统问题还是阀的问题，阀有什么问题，可否再使用。</span><span lang="EN-US" style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%;"><p></p></span></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt;"><span lang="EN-US"><p><font face="Times New Roman"> </font></p></span></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt;"><span lang="EN-US"><p><font face="Times New Roman"> </font></p></span></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt;"><span lang="EN-US"><p><font face="Times New Roman"> </font></p></span></p><p class="MsoNormal" align="right" style="MARGIN: 0cm 0cm 0pt; WORD-BREAK: break-all; TEXT-ALIGN: right;"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman";">联系电话：</span><span lang="EN-US"><font face="Times New Roman">021-56656744</font></span></p><p class="MsoNormal" align="right" style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: right;"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman";">传真：</span><span lang="EN-US"><font face="Times New Roman">021-64677999</font></span></p><p class="MsoNormal" align="right" style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: right;"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman";">地址：上海闸北永和路</span><span lang="EN-US"><font face="Times New Roman">90</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman";">号伺服阀部</span></p><p class="MsoNormal" align="right" style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: right;"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman";">联系人：李博</span></p><p class="MsoNormal" align="right" style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: right;"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman";">联系电话：</span><span lang="EN-US"><font face="Times New Roman">13818018452</font></span></p><p class="MsoNormal" align="right" style="MARGIN: 0cm 5.25pt 0pt 0cm; TEXT-ALIGN: right;"><span lang="EN-US"><span style="mso-spacerun: yes;"><font face="Times New Roman"> </font></span></span></p><p></p> |
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