《集控值班员》理论题

<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt;"><span lang="EN-US"><font face="Times New Roman">66</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">．高、中压缸同时启动和中压缸进汽启动各有什么优缺点？</span></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt;"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">答：（</span><span lang="EN-US"><font face="Times New Roman">1</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">）高、中压缸同时启动有如下特点：</span></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt;"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">蒸汽同时进入高、中压缸冲转转子，这种方法可使高、中压缸的级组分缸加热均匀，减少热应力，并能缩短启动时间。缺点是汽缸转子膨胀情况较负责，差胀较难控制。</span></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt;"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">（</span><span lang="EN-US"><font face="Times New Roman">2</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">）中压缸启动有如下特点：</span></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt;"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">冲转时高压缸不进汽，而是待转速升到</span><span lang="EN-US"><font face="Times New Roman">2000</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">～</span><span lang="EN-US"><font face="Times New Roman">2500r/min</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">后才逐步向高压缸进汽，这种启动方式对控制差胀有利，可以不考虑高压缸差胀问题，以达到安全启动的目的。但启动时间较长，转速也较难控制。采用中压缸进汽启动，高压缸无蒸汽进入，鼓风作用产生的热量使高压缸内部温度升高，因此还需引少量冷却蒸汽。</span></p>

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<p>感谢楼主的发帖，辛苦了，谢谢分享。</p>