单级离心泵设计论文
毕业设计 单级单吸离心泵水力及结构设计
目录摘要 (3)1 前言 (4)2 叶轮的水力设计 (5)2.1泵的主要设计参数和结构方案的确定 (5)2.2 叶轮主要参数的选择和计算 (7)2.3 叶轮的绘型 (12)2.4作叶轮进出口速度三角形 (25)3压水室的水力设计 (26)3.1 压水室的作用及螺旋型压水室作用的原理 (26)3.2压水室的设计和计算 (28)4结构设计 (33)4.1 主轴的结构设计 (33)4.2 装配图轮廓尺寸的初定 (33)5强度计算 (34)5.1泵轴的强度及临界转速计算 (34)5.2键的强度计算 (41)6 结论 (44)总结与体会 (44)谢辞 (44)参考文献 (45)摘要本设计是根据给定设计参数完成单级单吸离心泵IS125—100—200的水力及结构设计。
主要包括叶轮、压水室的水力设计和泵的结构设计。
确定出叶轮的几何参数，绘制并检查叶轮轴面投影图，采用方格网保角变换法完成扭曲形叶片绘形。
利用数字积分法，根据蜗壳内速度矩守恒，确定出蜗壳八个断面参数，并进行绘形。
最后对泵进行结构设计，绘制了装配图和部分零件图，并对轴进行了强度校核计算。
关键词：离心泵；叶轮；蜗壳；水力设计；结构设计AbstractAccording to the design parameters at the given point, this paper accomplished the design of the centrifugal pump. It mainly contained the hydraulic design of the impeller, volute casing and structural of pump, structural design of the pump. Based on the resolution method of design of the pump, author obtained the geometric parameters of the impeller. Then author projected and checked the cross-section of impeller, drew the cylindrical blade using methods of grid square conformal transformation. On the basis of constant velocity moment, author calculated parameters of cross-section of volute using digital integral method. Author also drew the spiral curve and diffuser of volute casing. Finally, the structural of the pump was designed and assembly drawing component graphics were drew. In addition, this program has been checked strength of the pump shaft.【Key words】：centrifugal pumps；impeller；volute casing；hydraulic design；structural design1前言水泵是一种应用广泛的水力通用机械，在航天、航空、发电、矿山、冶金、钢铁、机械、造纸、建筑以及农业和服务业等方面都有着广泛的应用。
离心泵设计论文解析
XXXXX 学院毕业设计(论文) 题目学生姓名年级专业学号指导教师起止日期20 年月日XXXXX学院毕业设计 (论文)任务书机电工程系班级（）姓名学号北海职业学院学生毕业设计（论文）成绩鉴定表综述离心泵的完好标准泵与风机、压缩机是流体机械的重要组成部分，一直是制冷与空调专业人士学习的基本科目。
泵是输送液体或使液体增压的机械。
它将原动机的机械能或其他外部能量传送给液体，使液体能量增加。
泵主要用来输送液体包括水、油、酸碱液、乳化液、悬乳液和液态金属等，也可输送液体、气体混合物以及含悬浮固体物的液体。
离心泵就是根据设计高速旋转的叶轮叶片带动水转动,将水甩出,从而达到输送的目的. 离心泵有好多种.从使用上可以分为民用与工业用泵,从输送介质上可以分为清水泵、杂质泵、耐腐蚀泵等。
一离心泵的分类方式类型特点一览表二、离心泵基本构造离心泵的基本构造是由六部分组成的，分别是：叶轮，泵体，泵轴，轴承，密封环，填料函。
1、叶轮是离心泵的核心部分，它转速高输出力大，叶轮上的叶片又起到主要作用，叶轮在装配前要通过静平衡实验。
叶轮上的内外表面要求光滑，以减少水流的摩擦损失。
2、泵体也称泵壳，它是水泵的主体。
起到支撑固定作用，并与安装轴承的托架相连接。
3、泵轴的作用是借联轴器和电动机相连接，将电动机的转距传给叶轮，所以它是传递机械能的主要部件。
4、轴承是套在泵轴上支撑泵轴的构件，有滚动轴承和滑动轴承两种。
滚动轴承使用牛油作为润滑剂加油要适当一般为2/3～3/4的体积太多会发热，太少又有响声并发热！滑动轴承使用的是透明油作润滑剂的,加油到油位线。
太多油要沿泵轴渗出并且漂*，太少轴承又要过热烧坏造成事故！在水泵运行过程中轴承的温度最高在85度一般运行在60度左右，如果高了就要查找原因（是否有杂质，油质是否发黑，是否进水）并及时处理！5、密封环又称减漏环。
叶轮进口与泵壳间的间隙过大会造成泵内高压区的水经此间隙流向低压区，影响泵的出水量，效率降低！间隙过小会造成叶轮与泵壳摩擦产生磨损。
离心泵毕业论文
离心泵毕业论文LT第一章泵的概述1.1 离心泵的基本结构离心泵的主要零件有叶轮、泵轴、泵体（泵壳）、泵盖、密封环、填料及填料压盖、托架等。
基本部件是高速旋转的叶轮和固定的蜗牛形泵壳。
图1、1 离心泵（1）通过泵体内高速旋转的叶轮对液体做功从而实现离心泵输送液体的目的，由此可知叶轮在离心泵内的重要地位。
叶轮需在装配前进行静平衡实验，并保持其内外表面光滑以水流的摩擦损失。
叶轮按其结构形式又可分为闭式叶轮、半开式叶轮及开式叶轮，且闭式叶轮适用于输送澄清的液体，半开式叶轮适用于输送粘稠及含有固体颗粒的液体，开式叶轮则适用于输送污水、含沙及含纤维的液体。
图1、2 叶轮结构形式叶轮按其吸液方式又可分为单吸式与双吸式两种，单吸式叶轮结构简单，液体只能从一侧吸入。
双吸式叶轮可同时从叶轮两侧对称地吸入液体，它不仅具有较大的吸液能力，而且基本上消除了轴向推力。
叶轮内部叶片的弯曲方向决定了扬程的大小，故而可根据叶轮上叶片的几何形状将叶片分为前弯、后弯与径向（出口）三种，又由于后弯叶片有利于液体的动能转换为静压能，故而在国民经济生产中得到了广泛的使用。
（2）泵轴利用联轴器和电动机相连接，将电动机的转矩传递给叶轮，是传递机械能的主要部件。
（3）泵体，即泵壳，是离心泵的主体，与离心泵的安装轴承托架相连接起支撑固定作用。
（4）密封环即减漏环，由于叶轮进口与泵壳间的间隙过大会造成泵内高压区的水从间隙处流向低压区，影响泵的出水量导致离心泵的效率降低；过小则造成叶轮与泵壳摩擦产生磨损。
故而为了延长叶轮与泵壳的使用寿命，需在泵壳内缘和叶轮外缘结合处装置密封环，且密封间隙保持在0.25~1.10mm之间最为恰当。
（5）填料函主要由填料、水封环、填料筒、填料压盖及水封管组成，其主要作用是为了封闭泵壳与泵轴之间的空隙，始终保持离心泵内的真空，不让水或空气由间隙流入泵内。
当泵轴与填料摩擦产生热量时就要通过水封管向水封圈内注水从而使填料冷却下来。
单级输油泵设计毕业论文
单级输油泵设计摘要：输油泵是用来将油从一个地方输送到另一个地方的设备，它主要用于油田和炼厂。
输油泵的种类很多，对于单级单吸离心泵存在四大难题：1，提高泵效；2，消除H—Q曲线驼峰问题；3，大流量、过载；4，提高汽蚀余量。
本文针对离心泵的难题，具体采用了如下措施：采用加大叶轮出口宽度b2，减小叶轮外径D2，增大叶轮出口角β2来提高效率；采用将叶轮进口边前移来减少汽蚀；同时采用将平衡孔位置移至叶轮叶片进水边境，且加大密封环直径的方法来平衡单级单吸离心泵轴向力；轴封采用机械密封，并且采用冷却系统，保证了降低密封腔介质温度及防止静环的强烈摩擦。
采用本文所设计的四种方法后，离心泵的工作性能有了很大改善，提高了它的稳定性和效率。
关键词：输油泵；泵效；平衡孔；机械密封；汽蚀The Desigin Of The Single Stage Oil Pump Abstract: The oil pump is an equipment that be used to transport the oil from one place to other.It is many used in oil field and oil refiner.The oil pumps can be divided into many types,For single-stage single-suction centrifugal pump four problems exist: 1,Improve the efficiency of the pump; 2,Elimination of H-Q curve hump problems; 3,Large flow、overload; 4,Improve the NPSH.For the problem of centrifugal pump,we specific use of the following measures in this paper:Increase the impeller outlet widthb2,reduced impeller diameter D2,increasing the impeller outlet angle β2to improve efficiency;Reduce cavitation by forward edge of the impeller inlet;At the same time, balanced single-stage single-suction centrifugal axial force by impeller balance hole location to the border water and increase the diameter of seal ringp;seal using the mechanical shaft seal,and using cooling system,Sealed chamber to ensure that the medium temperature to reduce and to prevent the stati cring’s strong friction.Designed in this paper is, after four methods, centrifugal pump performance has greatly improved,it also can improve its stability and efficiency.Key words: pump; pump efficiency; balance hole; mechanical seal; cavitation目录前言 (1)1 泵结构方案的选择 (2)1.1泵吸入口和排出口的确定 (2)1.2泵结构形式的确定 (2)1.2.1确定比转数ns: (2)1.2.2原动机的选择： (3)1.2.3确定泵的结构形式 (3)1.3最小轴颈的初步计算 (3)2 泵叶轮的设计 (5)2.1速度系数设计法 (5)2.1.1 速度系数设计法的计算步骤 (5)2.2 叶轮绘型 (9)3 压出室及吸入室的设计 (12)3.1 吸水室的结构设计 (12)3.2 压出室的结构设计 (13)3.2.1 压水室的作用和要求 (13)3.2.2 任意断面的螺旋压水室的设计 (13)4离心泵径向力、轴向力的平衡及平衡装置的设计 (19)4.1 离心泵径向力的平衡及平衡装置的设计计算 (19)4.1.1 径向力的平衡 (19)4.1.2 径向力的计算 (19)4.2 离心泵中轴向力的平衡及计算 (20)4.2.1 轴向力的计算 (20)4.2.2 轴向力的的平衡 (22)5 离心泵中主要零部件的设计 (24)5.1 轴的机构设计及校核 (24)5.1.1 轴的机构设计 (24)5.1.2 轴的校核 (25)5.2 转子临界转速的计算 (27)5.3 联轴器的选择与校核 (29)5.3.1 联轴器的选择 (29)5.3.2 联轴器的校核 (29)5.4 键的选择和校核 (30)5.4.1 键的选择 (30)5.4.2 键的校核 (30)5.5 轴承的选择及校核 (31)5.5.1 轴承的选择 (31)5.5.2 轴承的校核 (32)6 轴及叶轮密封结构的选择 (34)6.1 叶轮密封环的选择 (34)6.1.1 确定叶轮入口宽度b1 (34)6.1.2 叶片厚度 (35)6.2 轴端密封 (35)6.2.1 泵的轴封结构 (35)6.2.2 机械密封的结构、分类、工作原理及优点 (35)6.2.3 选择机械密封形式的依据 (36)6.2.4 机械密封的冷却及润滑 (37)6.2.5 抽空破坏及防抽空的方法............... 错误!未定义书签。
高效节能单级离心泵系列产品研制与开发
高效节能单级离心泵系列产品研制与开发摘要：根据通过优化水力模型设计，结合国内IS型单级单吸离心泵及国际ISO2858相关标准，研究农业水泵的叶轮和蜗壳复杂流道制造工艺，提高水泵过流部件表面粗糙度、减少水泵轴向力等技术问题，研发新型节能农业水泵，该系列农业水泵效率比IS型农业水泵高出2-8%。
关键词：高效；节能；单级离心泵；水力模型1 高效节能单级离心泵系列产品研制与开发的背景、所属产业在我省经济中的地位高效节能单级离心泵造业所属产业是高端装备制造业，是七大战略性新兴产业之一，属于我省优先支持的重点方向。
东部沿海先进制造业重要基地是国务院《关于支持福建省加快建设海峡西岸经济区的若干意见》确定的海峡西岸经济区的四个战略定位之一，是推进福建科学发展、跨越发展，加快增长方式转变的重要支撑。
而在泵类产品中，单级单吸离心泵属量大面广、品种繁多的产品。
据统计离心泵能耗约占泵产品能耗总量的1/3。
一般说世界各国泵消耗的电量约占总发电量的1/4，离心泵的耗电量为总发电量的1/12。
可见，开发高效节能单级离心泵系列产品，不仅是泵行业抓机遇，进行产品结构调整、升级换代的一项重要工作，同时也具有十分显著的社会与经济效益。
目前我国泵的总品种约为3000多种，而国外泵的品种在6000种以上，我国在泵的品种上仍有不少缺口，现有品种仅能基本适应国民经济发展的要求。
目前我国单级单吸单级离心泵现状及发展方向是IS型单级清水离心泵，现已占据我国单级泵主导位置30余年。
由于泵本身技术在进步，另一方面国民经济各部门对泵不断提出更多更高的要求，现有单级泵的性能难以满足国家的需要，尤其是泵的效率与现代的高效节能产品相比存在着很大的差距。
主要表现在：性能参数范围窄；效率和汽蚀指标偏低；叶轮进口堵塞，面积小，流速过高，影响汽蚀性能。
整体结构造型、零部件的结构有待改进。
据统计离心泵能耗约占泵产品能耗总量的1/3。
一般说世界各国泵消耗的电量约占总发电量的1/4，离心泵的耗电量为总发电量的1/12。
离心泵设计论文
XXXXX 学院毕业设计(论文) 题目学生姓名年级专业学号指导教师起止日期20 年月日XXXXX学院毕业设计 (论文)任务书机电工程系班级（）姓名学号北海职业学院学生毕业设计（论文）成绩鉴定表综述离心泵的完好标准泵与风机、压缩机是流体机械的重要组成部分，一直是制冷与空调专业人士学习的基本科目。
泵是输送液体或使液体增压的机械。
它将原动机的机械能或其他外部能量传送给液体，使液体能量增加。
泵主要用来输送液体包括水、油、酸碱液、乳化液、悬乳液和液态金属等，也可输送液体、气体混合物以及含悬浮固体物的液体。
离心泵就是根据设计高速旋转的叶轮叶片带动水转动,将水甩出,从而达到输送的目的. 离心泵有好多种.从使用上可以分为民用与工业用泵,从输送介质上可以分为清水泵、杂质泵、耐腐蚀泵等。
一离心泵的分类方式类型特点一览表二、离心泵基本构造离心泵的基本构造是由六部分组成的，分别是：叶轮，泵体，泵轴，轴承，密封环，填料函。
1、叶轮是离心泵的核心部分，它转速高输出力大，叶轮上的叶片又起到主要作用，叶轮在装配前要通过静平衡实验。
叶轮上的内外表面要求光滑，以减少水流的摩擦损失。
2、泵体也称泵壳，它是水泵的主体。
起到支撑固定作用，并与安装轴承的托架相连接。
3、泵轴的作用是借联轴器和电动机相连接，将电动机的转距传给叶轮，所以它是传递机械能的主要部件。
4、轴承是套在泵轴上支撑泵轴的构件，有滚动轴承和滑动轴承两种。
滚动轴承使用牛油作为润滑剂加油要适当一般为2/3～3/4的体积太多会发热，太少又有响声并发热！滑动轴承使用的是透明油作润滑剂的,加油到油位线。
太多油要沿泵轴渗出并且漂*，太少轴承又要过热烧坏造成事故！在水泵运行过程中轴承的温度最高在85度一般运行在60度左右，如果高了就要查找原因（是否有杂质，油质是否发黑，是否进水）并及时处理！5、密封环又称减漏环。
叶轮进口与泵壳间的间隙过大会造成泵内高压区的水经此间隙流向低压区，影响泵的出水量，效率降低！间隙过小会造成叶轮与泵壳摩擦产生磨损。
单级离心泵设计-翻译原文
CENTRIFUGAL PUMPS IN THE CHEMICAL INDUSTRYAbstract : A centrifugal pump converts the input power to kinetic energy in the liquid by accelerating the liquid by a revolving device - an impeller. The most common type is the volute pump. Fluid enters the pump through the eye of the impeller which rotates at high speed. The fluid is accelerated radially outward from the pump chasing. A vacuum is created at the impellers eye that continuously draws more fluid into the pump . This article stresses on a series of centrifugal pumps，From a brief introduction to the principles.Keywords : centrifugal pump ,Introduction ,Working principle , Cavitation ，Mechanism of Cavitation ，Solution and Remedies1. IntroductionPump ,device used to raise ,transfer ,or compress liquids and gases .Four general classes of pumps for liquids are described below .In all of them ,steps are taken to prevent cavitation (the formation of a vacuum) ,which would reduce the flow and damage the structure of the pump .Pumps used for gases and vapors are usually known as compressors .The study of fluids in motion is called fluid dynamics.Water pump ,device for moving water from one location to another ,using tubes or other machinery .Water pumps operate under pressures ranging from a fraction of a pound to more than 10,000 pounds per square inch .Everyday examples of water pumps range from small electric pumps that circulate and aerate water in aquariums and fountains to sump pumps that remove water from beneath the foundations of homes .One type of modern pumps used to move water is the centrifugal pump .Early version of the centrifugal pump ,the screw pump ,consists of a corkscrew-shaped mechanism in a pipe that ,when rotated ,pulls water upward .Screw pumps are often used in waste-water treatment plants because they can move large amounts of water without becoming clogged with debris .In the ancient Middle East the need for irrigation of farmland was a strong inducement to develop a water pump .Early pumps in this region were simple devices for lifting buckets of water from a source to a container or a trench .Greek mathematician and inventor Archimedes is thought to have devised the first screw pump in the third century BC .Later Greek inventor Ctesibius develop the first lift pump .During the late 17th and early 18th CenturiesAD ,British engineer Thomas Savery ,French physicist Denis Papin ,And British blacksmith and inventor Thomas Newcomen contributed to the development of a water pump that used steam to power the pump’ piston .The steam-powered water pump’s first wide use was in pumping water out of mines .Modern-day examples of centrifugal pumps are those used at the Grand Coulee Dam on the Columbia River .This pump system has the potential to irrigate over one million acres of land . Also known as rotary pumps ,centrifugal pumps have a rotating impeller ,also known as a blade ,that is immersed in the liquid .Liquid enters the pump near the axis of the impeller ,and the rotating impeller sweeps the liquid out toward the ends of the impeller blades at high pressure .The impeller also gives the liquid a relatively high velocity that can be converted into pressure in a stationary part of the pump ,known as the diffuser .In high-pressure pumps ,a number of impeller may be used in series ,and the diffusers following each impeller may contain guide vanes to gradually reduce the liquid velocity .For lower-pressure pumps ,the diffuser is generally a spiral passage ,known as a volute ,with its cross-sectional area increasing gradually to reduce the velocity efficiently .The impeller must be primed before it can begin operation ,that is ,the impeller must be surrounded by liquid when the pump is started .This can be done by placing a check valve in the suction line ,which holds the liquid in the pump when the impeller is not rotating .If this valve leaks ,the pump may need to be primed by the introduction of liquid from an outside source such as the discharge reservoir .A centrifugal pump generally has a valve in the discharge line to control the flow and pressure .For low flows and high pressures ,the action of the impeller is largely radial .For higher flows and lower discharge pressure ,the direction of the flow within the pump is more nearly parallel to the axis of the shaft ,and the pump is said to have an axial flow .The impeller in this case acts as a propeller .The transition from one set of floe conditions to the other is gradual ,and for intermediate condition , the device is called a mixed-flow pump .2.The Centrifugal PumpThe centrifugal pump is by far the most widely used type in the chemical and petroleum industries .It will pump liquids with very wide ranging properties and suspensions with a high solids content including ,for example ,cement slurries ,and may be constructed from a very wide rang of corrosion resistant materials .The whole pump casing may be constructed from plastic such as polypropylene or it may be fitted with a corrosion-resistant lining .Because it operates at high speed ,it may bedirectly coupled to an electric motor and it will give a high flow rate for its size .In this type of pump ,the fluid is fed to the centre of a rotating impeller and is thrown outward by centrifugal action .As a result of the high speed of rotation the liquid acquires a high kinetic energy and the pressure difference between the suction and delivery sides arises from the conversion of kinetic energy into pressure energy . The impeller consists of a series of curved vanes so shaped that the flow within the pump is as smooth as possible .The greater the number of vanes on the impeller ,the greater is the control over the direction of the liquid and hence the smaller are the losses due to turbulence and circulation between the vanes .In the open impeller ,the vanes are fixed to a central hub ,whereas in the closed type the vanes are held between two supporting plates and leakage across the impeller is reduced .As will be seen later ,the angle of the tips of the blades very largely determines the operating characteristics of the pump .The liquid enters the casing of the pump，normally in an axial direction，and is picked up by the vanes of the impeller．In the simple type of centrifugal pump，the liquid discharges into a volute，a chamber of gradually increasing cross—section with a tangential outlet．A volute type of pump is shown in Fig.(a)．In the turbine pump[-Fig．(b)]the liquid flows from the moving vanes of the impeller through a series of fixed vanes forming a diffusion ring．This gives a more gradual change in direction to the fluid and more efficient conversion of kinetic energy into pressure energy than is obtained with the volute type．The angle of the leading edge of the fixed vanes should be such that the fluid is received without shock．The liquids flows along the surface of the impeller vane with a certain velocity whilst the tip of the vane is moving relative to the casing of the pump．The direction of motion of the liquid relative to the pump casing--and the required angle of the fixed vanes—is found by compounding these two velocities．In Fig．c，c.v u is the velocity of the liquid relative to the vane and t u is the tangential velocity of the tip of the vane ；compounding these two velocities gives the resultant velocity 2u of the liquid ．It is apparent ，therefore ，that the required vane angle in the diffuser is dependent on the throughput ，the speed of rotation ，and the angle of the impeller blades ．The pump will therefore operate at maximum efficiency only over a narrow range of conditions ．Virtual head of a centrifugal pumpThe maximum pressure is developed when the whole of the excess kinetic energy of the fluid is converted into pressure energy. As indicated below ．the head is proportional to the square of the radius and to the speed ，and is of the order of 60m for a single —stage centrifugal pump ；for higher pressures ，multistage pumps must be used ．Consider the liquid which is rotating at a distance of between r and r+dr from the centre of the pump(Fig ．d)．dThe mass of this element of fluid dm is given by 2πrdrdρ，where ρ is the density of the fluid and 6 is the width of the element of fluid 。
毕业设计(论文)-离心泵的设计及其密封(含图纸) 1模板
题目离心泵的设计及其密封摘要：在当今社会离心泵的应用是很广泛的,在国民经济的许多部门要用到它。
在供给系统中几乎是不可缺少的一种设备。
在泵的实际应用中损耗严重，特别是化工用泵在实际应用中损耗，主要是轴封部分，在输送过程中由于密封不当而出现泄漏造成重大损失和事故。
轴封有填料密封和机械密封。
填料密封使用周期短，损耗高，效率低。
本设计使用机械密封。
主要以自己设计的离心泵为基础，对泵的密封进行改进，以减少损耗，提高离心泵寿命。
本设计其主要工作内容如下，自己设计一台扬程为40m，流量为100m3/h的离心泵。
电机功率为7.5kw，转速为2900r/min，.在0—800C工作环境下输送带杂质液体的离心泵的机械密封。
关键词：泵填料密封离心泵机械密封Centrifugal pump design and sealingAbstract: In today's society, the centrifugal pump is applied widely in the national economy, many departments should use it. In the supply system is almost an indispensable equipment. The practical application in pump industry, especially with serious loss in actual application of pump shaft seals, mainly is loss in the process of conveying, due to improper seal leakage caused heavy losses and accidents. Shaft seals have packing seal and mechanical seal. Packing seal use short cycle, the loss is high. Efficiency is low. This design USES mechanical seal. Mainly in their design based on centrifugal pump, and the improved seal pump, in order to reduce loss, improve the centrifugal pump life. This design is the main content of work, design a head for 40 MB, flow 100m/h of centrifugal pump. Electric power is 7.5 kw, speed for 2900r/min, the 0-80 C work environment impurity liquid conveyer belt of centrifugal pump mechanical seal.Keywords: pump packing seal centrifugal pump mechanical seal二离心泵的工作原理以及方案选择2.1 离心泵的工作原理离心泵工作前，先将泵内充满液体，然后启动离心泵，叶轮快速转动，叶轮的叶片驱使液体转动，液体转动时依靠惯性向叶轮外缘流去，同时叶轮从吸入室吸进液体，在这一过程中，叶轮中的液体绕流叶片，在绕流运动中液体作用一升力于叶片，反过来叶片以一个与此升力大小相等、方向相反的力作用于液体，这个力对液体做功，使液体得到能量而流出叶轮，这时候液体的动能与压能均增大。
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基于泵内液体流动的复杂性，至今还不能用理论计算的方法准确地获得泵的性能曲线，因此，通过试验手段开展对泵性能的研究，或对已有的产品确定其实际的工作性能就显得极为重要。根据试验条件和目的的不同，性能试验可分为试验台试验和现场式试验两种。试验台试验是指，将泵安装在制造厂或使用单位的泵性能试验装置上而进行的试验。其主要目的是：确定泵的工作性能曲线，确定它的工作范围，可以更好的向用户提供经济、合理地使用和选择的可靠数据；通过实验得到的性能曲线来校核设计参数，检验是否达到了设计所要求的技术指标，以便修改设计或改进制造质量。现场试验是指，泵安装到使用单位后，在实际的使用条件下进行的试验，其主要目的是为泵的安全、经济运行提供可靠的依据。例如，通过试验了解整个泵装置及管路系统的实际性能，据此来考察其选型是否合理，并以此为依据，制定经济运行方案，使其在负荷变动时也能随之按最经济合理的方式进行。在泵改造前进行试验，以便鉴定改进效果。通过试验测得的效率下降和出力变化的情况，来估计泵在长期运行中因汽化、磨损和内部不正常的泄露等因素所造成的内部损坏程度，以便及时检测并合理确定检修期限。
Keyword:Centrifugal pumpworking principle;Hydraulic design;Component design
of the impeller and the overcurrent;Strengthcheck;Seal design;The choice of keyand bearing
关键词：离心泵工作原理；水力方案设计；叶轮和过流部件设计；强度校核；密封设计；键、轴承的选择
Centrifugal Pump Design Manual
Abstract:This design starting from the basic working principle of the centrifugal pump,conducted a series of design calculations.consider the basic centrifugal pump performance,flowin a widerange,lift varies with the flow,the flow can only supply some lift (single-stage lift is generally 10~80m).The design head is50m,the design of the pumphydraulic scheme by calculating the number of revolutions(n=67.5)to determine thesingle-stage single-suction structure;choice of motor shaft power calculation;design parameters to determine the pump suction outlet diameter;determine the structure of the impeller and the impeller of the drawing of the hydraulic design of the impeller;flow parts of the design of centrifugal pump suction chamber for straight conical suction chamber,pressed out of the spiral-shaped pressure chamber;the structure and strength check of theaxisdesign;determine the impeller centrifugal pump seal design,pumpclosed form and washing, lubrication,cooling hod; determined by checking the standard bearings,and coupling to ensure that the standard connection.Departure from the economic viability of the rational design of centrifugal pump components,select the standard connector,to ensure the water using a centrifugal pump design safety,practicality,economy.
单级离心泵设计论文
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单级离心泵设计
摘要：本设计从离心泵的基本工作原理出发，进行了一系列的设计计算。考虑离心泵基本工作性能，流量范围大，扬程随流量而变化，在一定流量下只能供给一定扬程（单级扬程一般10～80m）。本设计扬程为50m，泵水力方案通过计算比转数（n=67.5）确定采用单级单吸结构；通过泵轴功率的计算确定选择三相异步电动机；由设计参数确定泵的吸入、压出口直径；通过叶轮的水力设计确定叶轮的结构以及叶轮的绘型；设计离心泵的过流部件，确定吸入室为直锥形吸入室，压出室为螺旋形压出室；设计轴的结构及进行强度校核；确定叶轮，泵体的密封形式及冲洗，润滑和冷却方式；通过查标准确定轴承，键以及联轴器，保证连接件的标准性。从经济可靠性出发，合理设计离心泵部件，选择标准连接件，保证清水离心泵设计的安全性，实用性，经济性。
1绪论
泵是一种将原动机的机械能转变为输送流体能量的机械。在任何工矿企业中，用不到离心泵的部门是没有的.在农业生产中，泵是主要的排灌机械。我国农用泵占泵总量的一半以上。在矿业和冶金工业中，泵也是使用得最多的设备。矿井下需要用泵排水；在选矿、冶炼和轧制过程中，需要用泵来供水等。另外，在国防建设、船舶制造、城市的给排水、蒸汽机车的用水、机床的润滑和冷却、纺织工业中输送漂液和染料、造纸工业中输送纸浆，以及食品工业中输送牛奶和糖类食品等，都需要大量的泵。