闭式回路柱塞泵产品样本--液压兔子请进
<P>你的那张照片上，主泵是个双向闭式回路柱塞泵，应该是vickers的，先附上三种规格的产品样本，希望能有你需要的。</P><P><FONT style="BACKGROUND-COLOR: #efefef">辅泵是给闭式回路补油的，同时还供压力油给主泵的控制回路，还对油品进行过滤。</FONT></P>
<P><FONT style="BACKGROUND-COLOR: #efefef">调压就在那一堆溢流阀处进行。</FONT></P>
<P><FONT style="BACKGROUND-COLOR: #efefef">但是parker的泵，冷却油不参与主泵的控制。</FONT></P>
Re: 闭式回路柱塞泵产品样本--液压兔子请进
现在的泵做的功能越来越强大，有点象小液压站，多看看，长长见识，泵是最重要的液压部件，多传些资料交流，对大家都有好处，我是大卫你能自我介绍一下吗，那种泵你那儿有吗？以后有不懂的还请多指教！不懂没关系，说出来让大家教，三个臭皮匠顶个诸葛亮，只要大家齐努力，中国一定会强大起来，不要老说中国与发达国家的差距，没用！要齐努力！加油啊！Re: 闭式回路柱塞泵产品样本--液压兔子请进
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">昨天很晚了才看到这个图，又忙乎下载泵的产品样本，没仔细分析回路。今天又看了一遍，发现一个问题，</SPAN><SPAN style="FONT-SIZE: 18pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">这个回路如果和实物完全一致</SPAN><SPAN style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">的话，可能会造成一个隐患，现说出我的</SPAN><SPAN style="FONT-SIZE: 22pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">推测</SPAN><SPAN style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">，仅供参考。</SPAN><SPAN lang=EN-US style="FONT-SIZE: 14pt"><?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" /><o:p></o:p></SPAN></P><P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">先说调压原理，主泵的排量是受先导伺服阀（也可能是比例阀）控制的，系统里应该有个压力传感器反馈给计算机，闭环控制设定系统压力，该压力应该是</SPAN><?xml:namespace prefix = st1 ns = "urn:schemas-microsoft-com:office:smarttags" /><st1:chmetcnv w:st="on" TCSC="0" NumberType="1" Negative="False" HasSpace="False" SourceValue="180" UnitName="公斤"><SPAN lang=EN-US style="FONT-SIZE: 14pt"><FONT face="Times New Roman">180</FONT></SPAN><SPAN style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">公斤</SPAN></st1:chmetcnv><SPAN style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">左右（或者系统压力设定成</SPAN><st1:chmetcnv w:st="on" TCSC="0" NumberType="1" Negative="False" HasSpace="False" SourceValue="200" UnitName="公斤"><SPAN lang=EN-US style="FONT-SIZE: 14pt"><FONT face="Times New Roman">200</FONT></SPAN><SPAN style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">公斤</SPAN></st1:chmetcnv><SPAN style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">，溢流阀组设定成</SPAN><st1:chmetcnv w:st="on" TCSC="0" NumberType="1" Negative="False" HasSpace="False" SourceValue="220" UnitName="公斤"><SPAN lang=EN-US style="FONT-SIZE: 14pt"><FONT face="Times New Roman">220</FONT></SPAN><SPAN style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">公斤</SPAN></st1:chmetcnv><SPAN style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">）。系统压力溢流阀组的作用是作为主泵的安全阀，否则高压溢流发热量会很大的。</SPAN><SPAN lang=EN-US style="FONT-SIZE: 14pt"><o:p></o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">溢流阀组的工作原理。如图所示，假定上回路高压，在压力没超过设定值的情况下，</SPAN><SPAN lang=EN-US style="FONT-SIZE: 14pt"><FONT face="Times New Roman">P1=P4=P5</FONT></SPAN><SPAN style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">，由于弹簧的作用，阀</SPAN><SPAN lang=EN-US style="FONT-SIZE: 14pt"><FONT face="Times New Roman">V1</FONT></SPAN><SPAN style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">处于关闭状态；当</SPAN><SPAN lang=EN-US style="FONT-SIZE: 14pt"><FONT face="Times New Roman">P5-P2>PV2</FONT></SPAN><SPAN style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">（阀</SPAN><SPAN lang=EN-US style="FONT-SIZE: 14pt"><FONT face="Times New Roman">V2</FONT></SPAN><SPAN style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">的设定值）（又及，</SPAN><SPAN lang=EN-US style="FONT-SIZE: 14pt"><FONT face="Times New Roman">V2</FONT></SPAN><SPAN style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">一般都选用直动式溢流阀，反应迅速，所以开启压力等于阀弹簧设定值</SPAN><SPAN lang=EN-US style="FONT-SIZE: 14pt"><FONT face="Times New Roman">+</FONT></SPAN><SPAN style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">背压值，背压</SPAN><SPAN lang=EN-US style="FONT-SIZE: 14pt"><FONT face="Times New Roman">P2</FONT></SPAN><SPAN style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">等于阀</SPAN><SPAN lang=EN-US style="FONT-SIZE: 14pt"><FONT face="Times New Roman">V3</FONT></SPAN><SPAN style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">的开启压力）时，溢流阀</SPAN><SPAN lang=EN-US style="FONT-SIZE: 14pt"><FONT face="Times New Roman">V2</FONT></SPAN><SPAN style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">打开，</SPAN><SPAN lang=EN-US style="FONT-SIZE: 14pt"><FONT face="Times New Roman">P5</FONT></SPAN><SPAN style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">变小（</SPAN><SPAN lang=EN-US style="FONT-SIZE: 14pt"><FONT face="Times New Roman">P1</FONT></SPAN><SPAN style="FONT-SIZE: 14pt; 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: 14pt"><FONT face="Times New Roman">P5</FONT></SPAN><SPAN style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">之间的节流阀导致在流动的状态下，</SPAN><SPAN lang=EN-US style="FONT-SIZE: 14pt"><FONT face="Times New Roman">P5<P1</FONT></SPAN><SPAN style="FONT-SIZE: 14pt; 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: 14pt"><FONT face="Times New Roman">P1=P4>P5</FONT></SPAN><SPAN style="FONT-SIZE: 14pt; 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: 14pt"><FONT face="Times New Roman">P4</FONT></SPAN><SPAN style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">驱动</SPAN><SPAN lang=EN-US style="FONT-SIZE: 14pt"><FONT face="Times New Roman">V1</FONT></SPAN><SPAN style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">换向到通路侧；同时，下面的阀</SPAN><SPAN lang=EN-US style="FONT-SIZE: 14pt"><FONT face="Times New Roman">V1</FONT></SPAN><SPAN style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">也打开，高压侧多余的高压油就溢流到吸油侧；当系统压力下降，</SPAN><SPAN lang=EN-US style="FONT-SIZE: 14pt"><FONT face="Times New Roman">P5-P</FONT></SPAN><SPAN lang=EN-US style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体">2</SPAN><SPAN style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体">≤</SPAN><SPAN lang=EN-US style="FONT-SIZE: 14pt"><FONT face="Times New Roman">PV2</FONT></SPAN><SPAN style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">时，</SPAN><SPAN lang=EN-US style="FONT-SIZE: 14pt"><FONT face="Times New Roman">V2</FONT></SPAN><SPAN style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">关闭，</SPAN><SPAN lang=EN-US style="FONT-SIZE: 14pt"><FONT face="Times New Roman">P5</FONT></SPAN><SPAN style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">重新等于</SPAN><SPAN lang=EN-US style="FONT-SIZE: 14pt"><FONT face="Times New Roman">P1</FONT></SPAN><SPAN style="FONT-SIZE: 14pt; 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: 14pt"><o:p></o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">隐患在哪里呢？</SPAN><SPAN lang=EN-US style="FONT-SIZE: 14pt"><FONT face="Times New Roman">P4</FONT></SPAN><SPAN style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">和</SPAN><SPAN lang=EN-US style="FONT-SIZE: 14pt"><FONT face="Times New Roman">P1</FONT></SPAN><SPAN style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">之间是单向阀，一旦超压，</SPAN><SPAN lang=EN-US style="FONT-SIZE: 14pt"><FONT face="Times New Roman">P1</FONT></SPAN><SPAN style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">的高压油可以溢流走掉，但是</SPAN><SPAN lang=EN-US style="FONT-SIZE: 14pt"><FONT face="Times New Roman">P4</FONT></SPAN><SPAN style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">的油没办法排掉，所以</SPAN><SPAN lang=EN-US style="FONT-SIZE: 14pt"><FONT face="Times New Roman">V1</FONT></SPAN><SPAN style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">就一直常开，泵就开始逐渐泄荷到压力为零。</SPAN><SPAN lang=EN-US style="FONT-SIZE: 14pt"><o:p></o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">你的泵一个多月一直工作正常，那应该是因为闭环控制做得好，一直没有超压。当然也有可能</SPAN><SPAN lang=EN-US style="FONT-SIZE: 14pt"><FONT face="Times New Roman">P4</FONT></SPAN><SPAN style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">处内泄漏量比较大。</SPAN><SPAN lang=EN-US style="FONT-SIZE: 14pt"><o:p></o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">建议你在</SPAN><SPAN lang=EN-US style="FONT-SIZE: 14pt"><FONT face="Times New Roman">P4</FONT></SPAN><SPAN style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">位置的工艺孔处加装测压接头，一旦出现上述情况，排出</SPAN><SPAN lang=EN-US style="FONT-SIZE: 14pt"><FONT face="Times New Roman">P4</FONT></SPAN><SPAN style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">处的压力油就能恢复正常。</SPAN><SPAN lang=EN-US style="FONT-SIZE: 14pt"><o:p></o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">这个溢流阀组应该是供货商自己加的，不是</SPAN><SPAN lang=EN-US style="FONT-SIZE: 14pt"><FONT face="Times New Roman">vickers</FONT></SPAN><SPAN style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">的设计。</SPAN><SPAN lang=EN-US style="FONT-SIZE: 14pt"><o:p></o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">我所有的推测都是建立在回路如果和实物完全一致的基础上的，实物如何，不得而知。</SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">如果你还要请教其他人，也可以单独再发一个帖子。</SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'"></SPAN> </P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'"></SPAN> </P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN style="FONT-SIZE: 14pt; 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: 14pt"><o:p></o:p></SPAN> </P>
Re: 闭式回路柱塞泵产品样本--液压兔子请进
该泵德国产，图纸原厂配来的，液压站给我留下深刻印象，管道走的整整齐齐，每个液压零件都有标牌，哪怕是测压接头，比例阀控制换向和流量，运行10年，故障率极低！是我见过的液压设备中最低的，德国专家也给我留下了深刻印象！一个人紧螺丝，同样一个人调试电气设备，最后还是他调试计算机，翻译说他一天工资800多美元，看看他想想我自己，差距太大，他们知识太全面，人高马大，干活还有力气..........我真的佩服德国同行！我从没怀疑过他们的设计！Re: 闭式回路柱塞泵产品样本--液压兔子请进
<P><FONT style="BACKGROUND-COLOR: #efefef">是人就可能犯错误，老外设计失误的我见多了。</FONT></P>Re: 闭式回路柱塞泵产品样本--液压兔子请进
你精神可嘉，你干啥的？能简单介绍一下吗？Re: 闭式回路柱塞泵产品样本--液压兔子请进
vickers阀是英国产，泵美国产，为何这样做？Re: 闭式回路柱塞泵产品样本--液压兔子请进
请看自我介绍---每人跟一贴 第43页Re: 闭式回路柱塞泵产品样本--液压兔子请进
你能给我介绍一下vickers公司吗？vickers阀是英国产，泵美国产，为何这样做？Re: 闭式回路柱塞泵产品样本--液压兔子请进
大卫说的老外常犯错误，我也遇过，是意大利的。和他合作设计及布置高压管路，他能一天犯上好几个错误。但德国专家一般是没得说，我觉得他们很严谨.液压站我觉得德国是最牛的；德国专家好设计得很紧凑，零部件材料选的也很好。
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