1、 1 毕业设计说明书 学 院: 机 电 工 程 学 院 专业年级: 2009 级热能与动力工程 学生姓名 : 学 号 : 设计 (论文 )题目 : C200-125-480 单级双吸中开式离心泵设计 起 迄 日 期 : 指 导 教 师 : 教研室负责 人 : 日期 : 2013 年 2 月 23 日 2 摘 要 本设计是根据给定设计参数完成 NSC125-200-480 双吸离心泵水力及结构设计。主要包括叶轮、蜗壳、吸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型 。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
2、数,并进行绘型。同样对吸水室进行水力设计计算并绘型。最后对双吸泵进行结构设计,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 : 双吸泵、叶轮、蜗壳、水力设计、结构设计 Abstract According to the design parameters at the given point, this paper accomplished the design of the double-suction pump. It mainly contained the hydraulic design of the impeller ,volute casing and struc
3、tural 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 transformati
4、on. 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 double-suction pump was designed and assembly drawing component graphics were drew. In addition, this program has been checked strength of the pump shaft. 【 Key words】 : double-suction pumps; impeller; volute casing;hydraulic design; structural design Title: NSC200-125-480 level in the open double suction pump