ns=48离心式锅炉引风机设计

机械设计制造及其自动化文档，文档编号:JX1450  文档字数:10146.页数:28  附CAD图

摘       要

 离心风机是依靠输入的机械能，提高气体压力并排送气体的机械，它是一种从动的流体机械。从能量观点来看，气体输送机械是把原动机的机械能主要转变为气体的势能的一种机械。
 离心式风机是应用最普遍的气体输送机械。可以输送空气、氧、氮、氢、乙烯和炳烯等各种气体。ns=48离心式引风机主要用于锅炉的送风，也可用于其他工业场合。ns=48离心式锅炉引风机是普通风机系列产品中的一个常用规格。
 本设计的离心式锅炉引风机的技术指标：流量qv=15m3/s；全压p=5.5KPa(N/m2)；转速 n=1450r/min；风机效率 η=84%。
 通过查阅大量的资料，对离心式锅炉引风机有一个大致的认识，了解其背景，然后制定设计方案。根据离心式通风机的工作原理对其进行结构上的分析，确定该产品的结构，以及所需要设计的零部件。根据已给的性能参数进行大量的计算，主要是叶轮的空气动力学计算、轴功率的计算、机壳尺寸的计算、轴的尺寸计算等，通过计算得到叶轮的直径、叶片数、叶片的出口角、轴的外径等一系列重要数据，由轴的外径确定需要使用的键的尺寸和轴承的尺寸，最后根据尺寸和强度要求进行精度设计，给出其各部件材料的选择，使其达到高效、节能、低噪音的目的。
关键词：风机  尺寸  结构  精度

Centrifugal fans is to rely on the input mechanical energy, improve the delivery side by side gas pressure of gas machinery, it is a follower of fluid machinery. From the energy point of view, the gas transport machinery is the main mover of the mechanical energy into potential energy of a mechanical gas.
 Centrifugal fan is the most common gas delivery machine. Can transmit air, oxygen, nitrogen, hydrogen, ethylene and ethylene and other gases Bing. ns = 48 Fan of the main air supply for the boiler can also be used in other industrial situations. ns = 48 Centrifugal Boiler Blower Fan is a common product in a common specification.
 The design of centrifugal induced draft fan boiler technical indicators: flow rate qv = 15m ³ / s; total pressure p = 5.5KPa (N/m2); speed n = 1450r/min; fan efficiency η = 84%.
 Through access to a lot of information on the boiler centrifugal induced draft fan to have a rough understanding about the background, and then to develop design. Centrifugal fan according to the work of the structural principle of its analysis to determine the product structure, and the need to design the components. According to the performance parameters have been a lot of calculations, mainly aerodynamic calculation of the impeller, shaft power calculation, the calculation of case size, shaft size calculation, obtained by calculating the impeller diameter, leaf number, leaf outlet angle, shaft diameter and a series of important data, from the axis of the outer diameter of the keys to use to determine the size and bearing size, the final size and strength according to the requirements of precision design, its various parts are given the choice of materials, so that its high efficiency and energy saving, low noise purposes.
 
Keywords: Fans   Size   Structure   Accuracy
 
目   录
中文摘要 I
外文摘要 II
目录 III
第一章    绪论 1
 1.1 概论 1
 1.2 设计背景 2
 1.3 设计方案 3
第二章    离心通风机的工作原理及结构分析 5
 1.1 工作原理 5
 1.2 结构分析 6
第三章    离心式锅炉引风机设计计算及材料选用 9
 1.1 叶轮的气动力计算与强度校核 10
 1.2 机壳尺寸计算 16
 1.3 集风器尺寸计算 18
 1.4 主轴与轴承部件的尺寸计算与校核 18
 1.5 键的选择 20
 1.6 离心通风机主要零件的材料选用 21
 1.7 动平衡测试 22
第四章    总结 23
参考文献 24
致谢 25

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