ns=48離心式鍋爐引風(fēng)機(jī)設(shè)計(jì)

機(jī)械設(shè)計(jì)制造及其自動(dòng)化論文，論文編號(hào):JX1450  論文字?jǐn)?shù):10146.頁(yè)數(shù):28  附CAD圖

摘       要

 離心風(fēng)機(jī)是依靠輸入的機(jī)械能，提高氣體壓力并排送氣體的機(jī)械，它是一種從動(dòng)的流體機(jī)械。從能量觀點(diǎn)來(lái)看，氣體輸送機(jī)械是把原動(dòng)機(jī)的機(jī)械能主要轉(zhuǎn)變?yōu)闅怏w的勢(shì)能的一種機(jī)械。
 離心式風(fēng)機(jī)是應(yīng)用最普遍的氣體輸送機(jī)械。可以輸送空氣、氧、氮、氫、乙烯和炳烯等各種氣體。ns=48離心式引風(fēng)機(jī)主要用于鍋爐的送風(fēng)，也可用于其他工業(yè)場(chǎng)合。ns=48離心式鍋爐引風(fēng)機(jī)是普通風(fēng)機(jī)系列產(chǎn)品中的一個(gè)常用規(guī)格。
 本設(shè)計(jì)的離心式鍋爐引風(fēng)機(jī)的技術(shù)指標(biāo)：流量qv=15m3/s；全壓p=5.5KPa(N/m2)；轉(zhuǎn)速 n=1450r/min；風(fēng)機(jī)效率 η=84%。
 通過(guò)查閱大量的資料，對(duì)離心式鍋爐引風(fēng)機(jī)有一個(gè)大致的認(rèn)識(shí)，了解其背景，然后制定設(shè)計(jì)方案。根據(jù)離心式通風(fēng)機(jī)的工作原理對(duì)其進(jìn)行結(jié)構(gòu)上的分析，確定該產(chǎn)品的結(jié)構(gòu)，以及所需要設(shè)計(jì)的零部件。根據(jù)已給的性能參數(shù)進(jìn)行大量的計(jì)算，主要是葉輪的空氣動(dòng)力學(xué)計(jì)算、軸功率的計(jì)算、機(jī)殼尺寸的計(jì)算、軸的尺寸計(jì)算等，通過(guò)計(jì)算得到葉輪的直徑、葉片數(shù)、葉片的出口角、軸的外徑等一系列重要數(shù)據(jù)，由軸的外徑確定需要使用的鍵的尺寸和軸承的尺寸，最后根據(jù)尺寸和強(qiáng)度要求進(jìn)行精度設(shè)計(jì)，給出其各部件材料的選擇，使其達(dá)到高效、節(jié)能、低噪音的目的。
關(guān)鍵詞：風(fēng)機(jī)  尺寸  結(jié)構(gòu)  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   錄
中文摘要 I
外文摘要 II
目錄 III
第一章    緒論 1
 1.1 概論 1
 1.2 設(shè)計(jì)背景 2
 1.3 設(shè)計(jì)方案 3
第二章    離心通風(fēng)機(jī)的工作原理及結(jié)構(gòu)分析 5
 1.1 工作原理 5
 1.2 結(jié)構(gòu)分析 6
第三章    離心式鍋爐引風(fēng)機(jī)設(shè)計(jì)計(jì)算及材料選用 9
 1.1 葉輪的氣動(dòng)力計(jì)算與強(qiáng)度校核 10
 1.2 機(jī)殼尺寸計(jì)算 16
 1.3 集風(fēng)器尺寸計(jì)算 18
 1.4 主軸與軸承部件的尺寸計(jì)算與校核 18
 1.5 鍵的選擇 20
 1.6 離心通風(fēng)機(jī)主要零件的材料選用 21
 1.7 動(dòng)平衡測(cè)試 22
第四章    總結(jié) 23
參考文獻(xiàn) 24
致謝 25