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<table border="0" cellpadding="3" cellspacing="1" width="100%" class="forumline"> <tr> <th class="thCornerL" width="22%">Autor</th> <th class="thCornerR">Wiadomość</th> </tr> <tr> <td width="22%" align="left" valign="top" class="row1"><span class="name"><a name=""></a><b>px477801</b></span></td> <td class="row1" valign="top"><table width="100%" border="0" cellspacing="0" cellpadding="0"> <tr> <td width="100%"><img src="http://picsrv.fora.pl/Elveron/images/icon_minipost.gif" width="12" height="9" alt="Post" title="Post" border="0" /><span class="postdetails">Wysłany: Sob 11:46, 06 Lis 2010<span class="gen"> </span> Temat postu: ugg boots sale Mine centrifugal pump based on the</span></td> </tr> <tr> <td colspan="2"><hr /></td> </tr> <tr> <td colspan="2"><span class="postbody">Mine centrifugal pump based on the conditions of cavitation <br /> <br /> <br />11) 7 to (11) Substituting (5) have △ = AH at one hundred and eleven: eleven hHx-Ahy so. Cavitation does not occur in the water height: one by one at Canton 【△ △] (12) V actual water height is smaller than this value, in order to ensure that cavitation does not occur. 4 to improve performance of anti-cavitation pump centrifugal pump manufacture and installation of measures to complete. The cavitation performance that is determined. To improve the drainage system of anti-cavitation capability. First, increase the pressure at the entrance to the impeller blades to consider. Second, you can also reduce the water pipeline from the resistance loss and optimization of water flow velocity in the pipeline general considerations. During the centrifugal pump design. In addition to accurately calculate the pump should be cavitation performance. To ensure that within the scope of its work outside do not produce cavitation. On the structure and process can take some measures to improve the delay performance of the centrifugal pump cavitation. Commonly used methods are: (1) the installation of the centrifugal pump into the water jet pump or the composition of the jet pump to improve the suction performance of units: (2) in front of the main pump pre-set low speed booster pump to the main pump to provide the required suction pressure: (3) using a good static and dynamic seal structure. To improve the suction line and to prevent inhalation of air tightness: ass fever fever reducing inhalation flow pulsation: (5) with good resistance to corrosion and erosion performance of materials. To increase the anti-cavitation impeller: (6) increase over current entrance to the impeller surface accuracy and surface roughness. To reduce the flow of imports of energy loss: (7) proper design of water lines and tapered tubes (90. Elbow) to reduce the resistance loss of flow of imports: (8) set in front of centrifugal screw impeller inducer to increase from 6,, i-round entrance to the liquid pressure in the above method. Import only in the impeller inducer way home plus the most effective and most reliable 5 Conclusion in the mine drainage system. The maximum suction centrifugal pumps should always be greater than the geometric height of mounting height. Otherwise, the pump will be in the process of opening surge cavitation in the pump cavitation greater impact on the drainage system. Therefore, the design must draw attention to manufacturers and managers. Only solve the pump cavitation. In order to improve the efficiency of the drainage pump. Reduce water costs,<a href="http://www.uggboots-onsale.org" target="_blank" class="postlink">ugg boots sale</a>, extend the pump life. Improve the economic efficiency of mine References: [1] Sun Shangyong. Fluid Dynamics and Fluid Machinery [M]. Beijing: Coal Industry Press D, 1991. [2] Ming-white students. Mine Fluid Mechanics [M]. Beijing: Coal Industry Press, 1985. [3] Miao Guoliang Xie pole,<a href="http://www.uk-cheapuggbootssale.com" target="_blank" class="postlink">boots uk</a>, Wang tied. Fan and water pump energy-saving guidelines [M]. Beijing: Coal Industry Press, lT. 1996. [4] Gao Chuan-chang, Zhang Changfu, weeks soldier. Cavitation in centrifugal pumps and adjust the status of theory T [J]. Fluid Machinery, 2001,29 (5) :16-19. Author: Ma Xianting (1961 a), Shandong Yuncheng, associate professor, senior engineer, graduated from Shandong Institute of Mining Mining Machinery former professional, now engaged in teaching and research, e-mail: mxtyin @ 163. coin. Received date :2009-05-2O journal statement \Founded in 1980, has been 29 years, each designated as Volume 1, Volume 2009, for the first 3O. 1 ~ 2, 1980 Volume 1 for the l ~ 6 1981, volume 2, a period of 1 to 6 in 1982, a period of 1-6 in 1983, Volume 3, Volume 4 of the 1 ~ 6 of 1984 as Volume 5 l ~ 6 1985 Volume 6 period in 1986,<a href="http://www.uggboots-onsale.org" target="_blank" class="postlink">ugg boots sale</a>, l ~ 6 period 1-6, 1987 Volume 7 Volume 8 of the period of 1988 Vol 9, 1-6, 1989 l ~ 12 lO period of the first volume 1990 112 1991 for the first 16 volumes l1 to l6 1992 Volume 12 Volume 13 of the period of 1993 1-6 1994 1-6 Volume 14, No. 15 of 1995 for the period 1-6 16 t996 for the first 1-6 years of volume in 1997 for the first l7 l6 l8 for the first volume of 1998 1l2 for the first 19 of 1999 1 ~ l2 for the first 20 volumes of l ~ 12 2000, Volume 21 period 2001 1 ~ l2 for the first 22 volumes of a 2002 ~ 7O 112 20o3 for the first 23 volumes of 112 to 24 a l2 Volume 1, 2004 Volume 25 of the l-l2, 2005 to Volume 26 of 2006 27 of 112 for the first volume 20HD7 on 112 for the first 28 volumes of l-l2, 2008 Vol 29,<a href="http://www.ugg-uggbootssale.com" target="_blank" class="postlink">ugg boots sale</a>, 2009 for the period of 30 1l2 references to articles published in volume,<a href="http://www.ugg-bootsguenstig.com" target="_blank" class="postlink">ugg boots günstig</a>, the volume of the article referenced page numbers <br /> More articles related to topics： <br /> <br /> <br /> <a href="http://www.ecid.fora.pl/ogolne,1/ugg-schuhe-times-take-the-road-of-independent-scho,1307.html#1433" target="_blank" class="postlink">ugg schuhe Times take the road of independent scho</a> <br /> <br /> <a href="http://www.hardtechnoaddict.fora.pl/benur,35/ugg-boots-deutschland-the-relationship-between-met,8664.html#13844" target="_blank" class="postlink">ugg boots deutschland The relationship between met</a> <br /> <br /> <a href="http://www.transfer-land.com/viewtopic.php?p=32560#32560" target="_blank" class="postlink">ugg boots günstig Hydraulic support structure wel</a></span></td> </tr> </table></td> </tr> <tr> <td colspan="2" height="1" class="spaceRow"><img src="http://picsrv.fora.pl/Elveron/images/spacer.gif" alt="" width="1" height="1" /></td> </tr> </table>
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