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北极星电力网技术频道 作者:佚名 2008/3/5 17:44:12
<p>由于WFGD工程的特点决定输送浆液的温度较高，富含气泡，并且含有大量固体颗粒。因此，由于浆液的蒸发和并发的气泡挤压破裂，造成特殊的振动和气体凝聚和疏散的压力波动，会影响泵的安全运行。需关照了以下两个方面：<br>
1.气体对流道的堵塞现象，会引起泵流量、扬程和效率的下降。<br>
2.汽泡在材料表面破裂引起的材料损失（汽蚀），要选择抗汽蚀能力强的材料。<br>
下面是一些材料的抗汽蚀特性。</p>
<p> </p>
<tableclass="MsoTableGrid"id="table1"style="BORDER-RIGHT:mediumnone;BORDER-TOP:mediumnone;BORDER-LEFT:mediumnone;BORDER-BOTTOM:mediumnone;BORDER-COLLAPSE:collapse"cellSpacing="0"cellPadding="0"border="1">
<tr>
<tdstyle="BORDER-RIGHT:windowtext1ptsolid;PADDING-RIGHT:5.4pt;BORDER-TOP:windowtext1ptsolid;PADDING-LEFT:5.4pt;PADDING-BOTTOM:0cm;BORDER-LEFT:windowtext1ptsolid;WIDTH:77.4pt;PADDING-TOP:0cm;BORDER-BOTTOM:windowtext1ptsolid"vAlign="top"width="103">
<pclass="MsoNormal"style="MARGIN-LEFT:15.75pt">Material</td>
<tdstyle="BORDER-RIGHT:windowtext1ptsolid;PADDING-RIGHT:5.4pt;BORDER-TOP:windowtext1ptsolid;PADDING-LEFT:5.4pt;PADDING-BOTTOM:0cm;BORDER-LEFT:mediumnone;WIDTH:99pt;PADDING-TOP:0cm;BORDER-BOTTOM:windowtext1ptsolid"vAlign="top"width="132">
<pclass="MsoNormal"style="MARGIN-LEFT:15.75pt">Designation</td>
<tdstyle="BORDER-RIGHT:windowtext1ptsolid;PADDING-RIGHT:5.4pt;BORDER-TOP:windowtext1ptsolid;PADDING-LEFT:5.4pt;PADDING-BOTTOM:0cm;BORDER-LEFT:mediumnone;WIDTH:63pt;PADDING-TOP:0cm;BORDER-BOTTOM:windowtext1ptsolid"vAlign="top"width="84">
<pclass="MsoNormal"style="MARGIN-LEFT:15.75pt">MaterialNo.</td>
<tdstyle="BORDER-RIGHT:windowtext1ptsolid;PADDING-RIGHT:5.4pt;BORDER-TOP:windowtext1ptsolid;PADDING-LEFT:5.4pt;PADDING-BOTTOM:0cm;BORDER-LEFT:mediumnone;WIDTH:90pt;PADDING-TOP:0cm;BORDER-BOTTOM:windowtext1ptsolid"vAlign="top"width="120">
<pclass="MsoNormal"style="MARGIN-LEFT:15.75pt">IndexWeightloss</td>
</tr>
<tr>
<tdstyle="BORDER-RIGHT:windowtext1ptsolid;PADDING-RIGHT:5.4pt;BORDER-TOP:mediumnone;PADDING-LEFT:5.4pt;PADDING-BOTTOM:0cm;BORDER-LEFT:windowtext1ptsolid;WIDTH:77.4pt;PADDING-TOP:0cm;BORDER-BOTTOM:windowtext1ptsolid"vAlign="top"width="103">
<pclass="MsoNormal"style="MARGIN-LEFT:15.75pt">Castiron</td>
<tdstyle="BORDER-RIGHT:windowtext1ptsolid;PADDING-RIGHT:5.4pt;BORDER-TOP:mediumnone;PADDING-LEFT:5.4pt;PADDING-BOTTOM:0cm;BORDER-LEFT:mediumnone;WIDTH:99pt;PADDING-TOP:0cm;BORDER-BOTTOM:windowtext1ptsolid"vAlign="top"width="132">
<pclass="MsoNormal"style="MARGIN-LEFT:15.75pt">GG25</td>
<tdstyle="BORDER-RIGHT:windowtext1ptsolid;PADDING-RIGHT:5.4pt;BORDER-TOP:mediumnone;PADDING-LEFT:5.4pt;PADDING-BOTTOM:0cm;BORDER-LEFT:mediumnone;WIDTH:63pt;PADDING-TOP:0cm;BORDER-BOTTOM:windowtext1ptsolid"vAlign="top"width="84">
<pclass="MsoNormal"style="MARGIN-LEFT:15.75pt">0.6025</td>
<tdstyle="BORDER-RIGHT:windowtext1ptsolid;PADDING-RIGHT:5.4pt;BORDER-TOP:mediumnone;PADDING-LEFT:5.4pt;PADDING-BOTTOM:0cm;BORDER-LEFT:mediumnone;WIDTH:90pt;PADDING-TOP:0cm;BORDER-BOTTOM:windowtext1ptsolid"vAlign="top"width="120">
<pclass="MsoNormal"style="MARGIN-LEFT:15.75pt">1</td>
</tr>
<tr>
<tdstyle="BORDER-RIGHT:windowtext1ptsolid;PADDING-RIGHT:5.4pt;BORDER-TOP:mediumnone;PADDING-LEFT:5.4pt;PADDING-BOTTOM:0cm;BORDER-LEFT:windowtext1ptsolid;WIDTH:77.4pt;PADDING-TOP:0cm;BORDER-BOTTOM:windowtext1ptsolid"vAlign="top"width="103">
<pclass="MsoNormal"style="MARGIN-LEFT:15.75pt">Caststeel</td>
<tdstyle="BORDER-RIGHT:windowtext1ptsolid;PADDING-RIGHT:5.4pt;BORDER-TOP:mediumnone;PADDING-LEFT:5.4pt;PADDING-BOTTOM:0cm;BORDER-LEFT:mediumnone;WIDTH:99pt;PADDING-TOP:0cm;BORDER-BOTTOM:windowtext1ptsolid"vAlign="top"width="132">
<pclass="MsoNormal"style="MARGIN-LEFT:15.75pt">GS-C25</td>
<tdstyle="BORDER-RIGHT:windowtext1ptsolid;PADDING-RIGHT:5.4pt;BORDER-TOP:mediumnone;PADDING-LEFT:5.4pt;PADDING-BOTTOM:0cm;BORDER-LEFT:mediumnone;WIDTH:63pt;PADDING-TOP:0cm;BORDER-BOTTOM:windowtext1ptsolid"vAlign="top"width="84">
<pclass="MsoNormal"style="MARGIN-LEFT:15.75pt">1.0619</td>
<tdstyle="BORDER-RIGHT:windowtext1ptsolid;PADDING-RIGHT:5.4pt;BORDER-TOP:mediumnone;PADDING-LEFT:5.4pt;PADDING-BOTTOM:0cm;BORDER-LEFT:mediumnone;WIDTH:90pt;PADDING-TOP:0cm;BORDER-BOTTOM:windowtext1ptsolid"vAlign="top"width="120">
<pclass="MsoNormal"style="MARGIN-LEFT:15.75pt">0.8</td>
</tr>
<tr>
<tdstyle="BORDER-RIGHT:windowtext1ptsolid;PADDING-RIGHT:5.4pt;BORDER-TOP:mediumnone;PADDING-LEFT:5.4pt;PADDING-BOTTOM:0cm;BORDER-LEFT:windowtext1ptsolid;WIDTH:77.4pt;PADDING-TOP:0cm;BORDER-BOTTOM:windowtext1ptsolid"vAlign="top"width="103">
<pclass="MsoNormal"style="MARGIN-LEFT:15.75pt">Castchromium</p>
<pclass="MsoNormal"style="MARGIN-LEFT:15.75pt">Steel</td>
<tdstyle="BORDER-RIGHT:windowtext1ptsolid;PADDING-RIGHT:5.4pt;BORDER-TOP:mediumnone;PADDING-LEFT:5.4pt;PADDING-BOTTOM:0cm;BORDER-LEFT:mediumnone;WIDTH:99pt;PADDING-TOP:0cm;BORDER-BOTTOM:windowtext1ptsolid"vAlign="top"width="132">
<pclass="MsoNormal"style="MARGIN-LEFT:15.75pt">G-X20Cr14</td>
<tdstyle="BORDER-RIGHT:windowtext1ptsolid;PADDING-RIGHT:5.4pt;BORDER-TOP:mediumnone;PADDING-LEFT:5.4pt;PADDING-BOTTOM:0cm;BORDER-LEFT:mediumnone;WIDTH:63pt;PADDING-TOP:0cm;BORDER-BOTTOM:windowtext1ptsolid"vAlign="top"width="84">
<pclass="MsoNormal"style="MARGIN-LEFT:15.75pt">1.4027</td>
<tdstyle="BORDER-RIGHT:windowtext1ptsolid;PADDING-RIGHT:5.4pt;BORDER-TOP:mediumnone;PADDING-LEFT:5.4pt;PADDING-BOTTOM:0cm;BORDER-LEFT:mediumnone;WIDTH:90pt;PADDING-TOP:0cm;BORDER-BOTTOM:windowtext1ptsolid"vAlign="top"width="120">
<pclass="MsoNormal"style="MARGIN-LEFT:15.75pt">0.2</td>
</tr>
<tr>
<tdstyle="BORDER-RIGHT:windowtext1ptsolid;PADDING-RIGHT:5.4pt;BORDER-TOP:mediumnone;PADDING-LEFT:5.4pt;PADDING-BOTTOM:0cm;BORDER-LEFT:windowtext1ptsolid;WIDTH:77.4pt;PADDING-TOP:0cm;BORDER-BOTTOM:windowtext1ptsolid"vAlign="top"width="103">
<pclass="MsoNormal"style="MARGIN-LEFT:15.75pt">CastCrNisteel</td>
<tdstyle="BORDER-RIGHT:windowtext1ptsolid;PADDING-RIGHT:5.4pt;BORDER-TOP:mediumnone;PADDING-LEFT:5.4pt;PADDING-BOTTOM:0cm;BORDER-LEFT:mediumnone;WIDTH:99pt;PADDING-TOP:0cm;BORDER-BOTTOM:windowtext1ptsolid"vAlign="top"width="132">
<pclass="MsoNormal"style="MARGIN-LEFT:15.75pt">G-X6CrNi189</td>
<tdstyle="BORDER-RIGHT:windowtext1ptsolid;PADDING-RIGHT:5.4pt;BORDER-TOP:mediumnone;PADDING-LEFT:5.4pt;PADDING-BOTTOM:0cm;BORDER-LEFT:mediumnone;WIDTH:63pt;PADDING-TOP:0cm;BORDER-BOTTOM:windowtext1ptsolid"vAlign="top"width="84">
<pclass="MsoNormal"style="MARGIN-LEFT:15.75pt">1.4308</td>
<tdstyle="BORDER-RIGHT:windowtext1ptsolid;PADDING-RIGHT:5.4pt;BORDER-TOP:mediumnone;PADDING-LEFT:5.4pt;PADDING-BOTTOM:0cm;BORDER-LEFT:mediumnone;WIDTH:90pt;PADDING-TOP:0cm;BORDER-BOTTOM:windowtext1ptsolid"vAlign="top"width="120">
<pclass="MsoNormal"style="MARGIN-LEFT:15.75pt">0.05</td>
</tr>
<tr>
<tdstyle="BORDER-RIGHT:windowtext1ptsolid;PADDING-RIGHT:5.4pt;BORDER-TOP:mediumnone;PADDING-LEFT:5.4pt;PADDING-BOTTOM:0cm;BORDER-LEFT:windowtext1ptsolid;WIDTH:77.4pt;PADDING-TOP:0cm;BORDER-BOTTOM:windowtext1ptsolid"vAlign="top"width="103">
<pclass="MsoNormal"style="MARGIN-LEFT:15.75pt">NORIDUR</td>
<tdstyle="BORDER-RIGHT:windowtext1ptsolid;PADDING-RIGHT:5.4pt;BORDER-TOP:mediumnone;PADDING-LEFT:5.4pt;PADDING-BOTTOM:0cm;BORDER-LEFT:mediumnone;WIDTH:99pt;PADDING-TOP:0cm;BORDER-BOTTOM:windowtext1ptsolid"vAlign="top"width="132">
<pclass="MsoNormal"style="MARGIN-LEFT:15.75pt">G-X3CrNiMoCu246</td>
<tdstyle="BORDER-RIGHT:windowtext1ptsolid;PADDING-RIGHT:5.4pt;BORDER-TOP:mediumnone;PADDING-LEFT:5.4pt;PADDING-BOTTOM:0cm;BORDER-LEFT:mediumnone;WIDTH:63pt;PADDING-TOP:0cm;BORDER-BOTTOM:windowtext1ptsolid"vAlign="top"width="84">
<pclass="MsoNormal"style="MARGIN-LEFT:15.75pt">9.4460</td>
<tdstyle="BORDER-RIGHT:windowtext1ptsolid;PADDING-RIGHT:5.4pt;BORDER-TOP:mediumnone;PADDING-LEFT:5.4pt;PADDING-BOTTOM:0cm;BORDER-LEFT:mediumnone;WIDTH:90pt;PADDING-TOP:0cm;BORDER-BOTTOM:windowtext1ptsolid"vAlign="top"width="120">
<pclass="MsoNormal"style="MARGIN-LEFT:15.75pt">0.02</td>
</tr>
</table>
<br>
汽蚀会引起如下问题<br>
1.降低轴承寿命。<br>
2.造成叶轮进口区域材料损坏。<br>
3.泵轴损坏。<br>
4.机械密封接触面损坏，引起泄漏。<br>
5.噪音升高，似乎在输送圆形硬颗粒。 </P>
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