电气设计与机械计算的有关问题

liulian2001

<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt;"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman';">小弟是从事电气设计的，有几个问题要向各位请教：</span></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt 18pt; TEXT-INDENT: -18pt; mso-list: l0 level1 lfo1; tab-stops: list 18.0pt;"><span lang="EN-US"><font face="Times New Roman">1、<span style="FONT: 7pt 'Times New Roman';">&nbsp; </span></font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman';">驱动系统的功率分配问题：</span></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt 18pt;"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman';">是否在带式机的设计和驱动点布置时候就已经考虑好了功率分配问题，如果在调试时候发现有问题如何处理呢？例如：有一条输送机采用头部和尾部驱动形式，驱动采用变频器，但是在重载运行时候发现一台过载一台还没到满载，我想通过降低过载那台驱动的速度达到负荷重新分配，但速度调整就意味着头部和尾部驱动速度有一些差异，这在输送机的系统中会有什么不利的影响吗？</span></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt 18pt; TEXT-INDENT: -18pt; mso-list: l0 level1 lfo1; tab-stops: list 18.0pt;"><span lang="EN-US"><font face="Times New Roman">2、<span style="FONT: 7pt 'Times New Roman';">&nbsp; </span></font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman';">通常在电气设计前机械应该提供那些参数做电气的设计依据？</span></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt 18pt;"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman';">如：起，制动的最大加速度；驱动最大过载倍数和时间；驱动是工作在发电还是电动状态，有多大的发电功率；还有别的吗？</span></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt 18pt; TEXT-INDENT: -18pt; mso-list: l0 level1 lfo1; tab-stops: list 18.0pt;"><span lang="EN-US"><font face="Times New Roman">3、<span style="FONT: 7pt 'Times New Roman';">&nbsp; </span></font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman';">在大型皮带机系统中，各驱动的形式有明显的优势吗？</span></p><span style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-size: 12.0pt; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA;">&nbsp;&nbsp; 如：单电机驱动功率达到</span><span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: 'Times New Roman'; mso-bidi-font-size: 12.0pt; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-fareast-font-family: 宋体;">800KW</span><span style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-size: 12.0pt; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA;">甚至</span><span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: 'Times New Roman'; mso-bidi-font-size: 12.0pt; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-fareast-font-family: 宋体;">1800KW</span><span style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-size: 12.0pt; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA;">，这时采用变频器驱动就要采用</span><span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: 'Times New Roman'; mso-bidi-font-size: 12.0pt; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-fareast-font-family: 宋体;">6KV</span><span style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-size: 12.0pt; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA;">或</span><span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: 'Times New Roman'; mso-bidi-font-size: 12.0pt; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-fareast-font-family: 宋体;">10KV</span><span style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-size: 12.0pt; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA;">价格非常高，在这种情况下采用</span><span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: 'Times New Roman'; mso-bidi-font-size: 12.0pt; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-fareast-font-family: 宋体;">CST</span><span style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-size: 12.0pt; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA;">是否便宜些呢？</span>

long650101

<p>建议楼上的就事论事的讨论，一大堆问题（又不是同时出现）恐怕谁也不好回答。</p>

潇雨天

<p>用变频比CST好的多，因为CST只能短期内平衡功率，平衡功率就意味着有滑差，如果长期有滑差发热问题根本解决不了，这是我们从实践中得出的结果</p>

sunshine-315

请教楼主，你说的CST是什么？

liulian2001

<p>头尾变频调速的皮带机可以通过改变头尾驱动的速度达到负载的重新分配吗?</p><p>例如:头部49HZ,尾部50HZ,这样可能负荷就会趋向于尾部增加啊.</p>

liulian2001

<p>如果皮带机采用头,尾变频驱动(头尾各有一台变频电机),那么采取改变头尾速度的差值应该可以达到重新分配</p><p>负荷的目的.但是对皮带机会有影响吗?</p><p>我觉得头尾有速度的差值会产生头尾部线速度不一致,这样时间长了就会有积累位移,这样是皮带机不允许的.</p><p>&nbsp;</p>

zhangtsh1

没做过带式输送机

princeash44

问题太多了，建议慢慢来