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山东科技大学学士学位论文I摘要本次论文设计是基于煤矿流体机械选型设计，完成煤矿主排水设备水泵的型及设计，通风机选型与设计和4-72-11No.20B离心风机房的降噪设计三大任务旨在提高设备利用效率，降低风机房的噪声，实现最大经济效益。本文根据安全和工作能力的要求，选取相应的水泵，离心风机以及对应的电动机。并且根据煤矿需要，计算年耗电量，进行基本的生产成本算。降噪设计通过对噪声原理设计计算，设计选择合适的消声器，对风机出进行合理的设计，安装一定的扩散型消声器，同时解决风机出口消声器的气流再生噪声及高频失效问题。本文主要是煤矿用排水设备的选型、矿用风机的选型，以及风机扩散器出口噪声综合治理。通过对以上设备的合理选型及设计，使工人的工作条件得到一定的改善，实现最大的经济效益。关键词：水泵；通风机；4-72No.20B离心风机；隔声；风机房山东科技大学学士学位论文IIABSTRACTThisdesignisbaseonthecoalminefluidmachinerychoosestypeanddesign,tocompletthreemaintask:coal-mastercatchmentequipmentchosendesign,ventilatorbloserchosendesignand4-72-11No.20Bcentrifugalfanvibrationrdductiondesign.Thelastpurposeistoimprovethefacilityefficiency,reducecentrifugalfanvibration,sowecancarryoutthebiggesteconomicbenefit.Inthispapper,accordingtotherequstofthesaftyandtheworkingability,wechoosethecorrespondingwaterpump,centrifugalfanandthenecessaryelectromotor.What’smore,basedontherequstofthecoal-mine,calculatethewholeyearofelectricityconsumption,andfinishthebasicproductioncostaccounting.Therefore,thewindwardengineroomcarriesonthereasonabledesign,thearrangementcertainamountsoundproofinggate,thesoundproofingwindow,thewindengineroomarrangesthesoundabsorptionbodythenoisereductiondirttodye;Meanwhilecarriesonthevibrationisolationplaceprincipletotheairblowerelectricalmachinerytwomainnoisesources!Thisarticleismainlycoalpumpequipmentselection，thecoalminewiththehostfanpassairblowerequipmentshaping,thewindengineroom'ssoundinsulation,thesoundabsorptionaswellastheairblowerandelectricmotor'svibrationisolationplaceprinciple.Sowecancarryoutthebiggesteconomicbenefit.Keywords:Pump；Fan；4-72-11No.20BCentrifugalfan；Noise；Fanroom；山东科技大学学士学位论文III目录摘要....................................................IABSTRACT..............................................................................................II1绪论..................................................11.1国内外通风机的研究现状......................................11.1.1中国通风机的发展现状...................................11.1.2国外通风机的发展现状...................................21.1.3国内外通风机的发展比较.................................21.1.4离心风机的噪声控制.....................................31.2离心风机行业未来发展趋势.....................................41.3本课题的研究目的和意义.......................................42水泵设备选型与设计....................................52.1煤矿对排水设备的要求........................................52.2确定泵的型号、台数..........................................62.2.1排水设备最小能力计算...................................62.2.2水泵扬程估算...........................................62.2.3预选水泵的形式.........................................72.2.4确定水泵的级数.........................................72.2.5选定水泵的有关参数.....................................72.2.6校验水泵稳定性.........................................82.2.7确定水泵的台数.........................................82.3选择排水、吸水管的规格、趟数................................82.4确定水泵工况点.............................................112.5验算稳定性，排水时间，计算年电耗...........................122.5.1验算排水时间..........................................122.5.2计算水泵安装高度......................................132.5.3验算电机容量..........................................132.5.4计算耗电量............................................14山东科技大学学士学位论文IV2.6水泵房的草绘绘制及计算机制图...............................153通风机设备选择与设计..................................163.1通风机选型的要求和原则.....................................163.1.1矿山风机设备的选型要求................................163.1.2矿山风机设备的选型原则................................163.2.1选择设计的任务........................................173.2.2设计参数..............................................173.3选择风机类型和型号.........................................173.3选配辅助装置...............................................183.3确定设备组合方案...........................................193.4提出经济核算结果...........................................213.5风机房的草绘及计算机制图...................................2244-72No.20B离心风机隔声设计...........................224.1噪声机理...................................................224.1.1风机噪声产生机理......................................224.1.2风机噪声控制的方法....................................234.2消声器.....................................................234.3离心风机扩散器出口噪声综合治理.............................254.3.1设计原始资料..........................................254.3.2设计应解决下列主要问题................................254.3.3确定消声器的消声量....................................264.3.4确定消声器的结构......................................264.3.5选择吸声材料及吸声层..................................274.3.6设计消声器长度........................................284.3.7验算消声器长度是否符合要求............................294.3.8计算高频失效的影响....................................304.3.9验算气流再生噪声......................................30参考文献...............................................32山东科技大学学士学位论文V致谢...................................................33附录...................................................34英文文献原文...........................................34山东科技大学学士学位论文11绪论在煤矿流体机械中，矿山排水设备与矿山通风设备是其必备的重要设施。矿井通风系统是由向井下各作业地点供给新鲜空气、排出污浊空气的通风网路和通风动力以及通风控制设施等构成的工程体系。矿井通风系统与井下各作业地点相联系，对矿井通风安全状况具有全局性影响，是搞好矿井通风系统防尘的基础工程。而无论是水泵房还是风机房都会产生噪声，噪声主要是电动机、水泵、通风机工作产生的。噪声过大不仅会给工