轴流送风机的设计

中国矿业大学徐海学院毕业设计任务书专业年级学号学生姓名任务下达日期：2014年12月20日毕业设计日期：2015年1月20日至2015年6月10日毕业设计题目：轴流送风机的设计毕业设计专题题目：毕业设计主要内容和要求：指导教师签字：郑重声明本人所呈交的毕业设计，是在导师的指导下，独立进行研究所取得的成果。所有数据、图片资料真实可靠。尽我所知，除文中已经注明引用的内容外，本毕业设计的研究成果不包含他人享有著作权的内容。对本论文所涉及的研究工作做出贡献的其他个人和集体，均已在文中以明确的方式标明。本论文属于原创。本毕业设计的知识产权归属于培养单位。本人签名：日期：中国矿业大学徐海学院毕业设计指导教师评阅书指导教师评语（①基础理论及基本技能的掌握；②独立解决实际问题的能力；③研究内容的理论依据和技术方法；④取得的主要成果及创新点；⑤工作态度及工作量；⑥总体评价及建议成绩；⑦存在问题；⑧是否同意答辩等）：成绩：指导教师签字：年月日中国矿业大学徐海学院毕业设计评阅教师评阅书评阅教师评语（①选题的意义；②基础理论及基本技能的掌握；③综合运用所学知识解决实际问题的能力；③工作量的大小；④取得的主要成果及创新点；⑤写作的规范程度；⑥总体评价及建议成绩；⑦存在问题；⑧是否同意答辩等）：成绩：评阅教师签字：年月日中国矿业大学徐海学院毕业设计答辩及综合成绩答辩情况提出问题回答问题正确基本正确有一般性错误有原则性错误没有回答答辩委员会评语及建议成绩：答辩委员会主任签字：年月日学院领导小组综合评定成绩：学院领导小组负责人：年月日摘要本次设计的任务是根据用户给定的流量、全压、转速、传动方式、气体密度、输送介质的具体要求，主要利用孤立叶型设计法，设计出一台符合用户要求的轴流式送风机，然后对设计的风机进行强度校核，并画出装配图及部分零件图。设计的主要内容包括轴流风机的气动设计、结构设计以及强度校核。其中采用孤立叶形法进行叶片的设计，采用平面叶栅法对后导叶进行设计；结构设计包括叶轮、叶柄、集流器、整流罩、扩散器、径向间隙、轴向间隙以及机壳的设计；校核主要是对轮毂、叶片、铆钉、键及效率的校核，既保证风机安全可靠地运行又保证设计的风机符合要求。在结构设计中，遵守的原则是：可靠性高，投资少，运行费用低，操作简单。经过校核，设计的轴流送风机既满足用户要求的同时又满足强度要求。关键词：轴流送风机；气动设计；结构设计；校核ABSTRACTThetaskofthisdesignisaccordingtotheuserofagivenflow,totalpressure,rotationspeed,transmissionmethods,gasdensity,thespecificrequirementsofthetransmissionmedium.Inthedesignofthemainuseofisolatedbladedesignmethod,designameettherequirementsoftheusersFlowblower.Thentointensitydesignofthefan,anddrawtheassemblydrawingandpartsdiagram.Themaincontentofthedesignincludingtheaxialflowfanpneumaticdesign,structuredesignandstrengthcheck.Theisolatedleafshapemethodforthedesignoftheblade,theplaneoftheguidevanecascademethodtocarryonthedesign.Structuredesignincludingimpeller,petiole,currentcollector,fairinganddiffuser,radialclearanceandaxialclearance,andthedesignofthechassis.Checkpartmainlyinhub,blade,rivets,keys,andtheefficiencyofthechecking.Ensurethefanrunningsafelyandreliablyandtoensurethatthedesignmeetstherequirementsoffan.Instructuredesign,highreliability,lowoperatingcost,simpleoperationaretokeeptheprincipleoflessinvestment,.Afterchecking,thedesignofaxialflowblowerwillnotonlysatisfytheuser'srequirementsatthesametimemeetthestrengthrequirement.Keywords:axialflowblower;Pneumaticdesign;Structuredesign;check目录1绪论································································································11.1通风机简介················································································11.1.1通风机行业现状··································································11.1.2我国通风机行业存在的差距···················································31.1.3通风机行业的发展趋势·························································41.1.4通风机设计研究概况····························································51.1.5通风机在电厂中的应用·························································51.1.6本文的主要工作··································································51.2轴流风机的基本理论···································································61.2.1工作原理···········································································61.2.2叶型及叶栅的几何参数·························································81.2.3流体在叶轮中的运动及速度三角形··········································91.2.4叶栅翼型的空气动力学特性··················································101.2.5孤立叶型设计法·································································131.2.6平面叶栅法·······································································201.2.7叶栅中的损失及效率···························································202风机设计部分··················································································232.1方案设计··················································································232.2轴流风机的气动设计··································································232.2.1结构选择··········································································232.2.2选择电机··········································································242.2.3确定叶轮外径及轮毂直径·····················································242.2.4圆周速度与压力系数···························································272.2.5轴向速度··········································································272.2.6中间截面的各参数······························································282.2.7选择叶片数·······································································282.2.8升力系数与相应的攻角························································292.2.9叶片宽度和栅距·································································292.2.10叶型安装角······································································292.2.11各截面参数计算结果··························································302.2.12绘制叶片线性···································································312.3后导叶参数选取·········································································322.3.1导叶的进出口气流角···························································332.3.2气流转折角与稠·································································332.3.3栅距与叶片宽度·································································342.3.4各截面参数·······································································343结构设计·················