【正文】 重慶大學(xué)本科學(xué)生畢業(yè)設(shè)計（論文） 離心式鼓風(fēng)機設(shè)計 學(xué) 生： *** 學(xué) 號： ****** 指導(dǎo)教師：劉玉東 校外指導(dǎo)教師：張雪琴 專 業(yè)：熱能與動力工程 重慶大學(xué)動力工程學(xué)院 二 O 一一 年六月 Graduation Design(Thesis) of Chongqing University Design of Centrifugal Blower Undergraduate:***** Supervisor at school: . Liu yudong Supervisor out of school :Zhang Xueqin Major:thermal and power engineering College of Power Engineering Chongqing University June 2021 重慶大學(xué)本科學(xué)生畢業(yè)設(shè)計（論文） 中文 摘要 I 摘 要 在設(shè)計條件下， 風(fēng)壓 為 30kPa~200KPa 或壓力比 e=~3 的 風(fēng)機 叫鼓風(fēng)機。 鼓風(fēng)機的用途非常廣泛， 根據(jù)其不同功效，鼓風(fēng)機應(yīng)用于生產(chǎn)、生活中多個環(huán)境中。它 大量運用于 冶金、化工、化肥、石化、食品、建材、 石油 、礦井、 紡織、 煤氣站 、氣力輸送、 污水處理 等各工業(yè)部門 。其中，在污水處理中，運用最多的鼓風(fēng)機有離心式鼓風(fēng)機和羅茨鼓風(fēng)機。 本文設(shè)計的離心式鼓風(fēng)機主要運用于污水處理，根據(jù)給定的的設(shè)計參數(shù) ： 進氣壓力 1 ㎏ f/㎡ (A)， 溫度 20℃ ， 相對濕度 80%， 進 氣流量 100m3/min， 排氣壓力 ㎏ f/㎡ (G)以及污水處理廠的實際情況，進行熱力計算及其結(jié)構(gòu)設(shè)計。首先確定壓力比，根據(jù)壓力比來確定所設(shè)計的鼓風(fēng)機的段數(shù)。當壓力比 3 時，其段數(shù)為 1。因為本次設(shè)計壓力比為 ，故鼓風(fēng)機的段數(shù)為 1。其次對氣體的物性參數(shù)進行計算，算出濕空氣的氣體常數(shù)和定熵指數(shù)。再次，運用效率疊加法，主要根據(jù)徐忠編寫的離心壓縮機原理一書，對吸氣室、葉輪、擴壓器和蝸殼進行詳細設(shè)計計算。最后，對葉輪輪盤和葉片進行強度校核，畫出葉輪、蝸殼結(jié)構(gòu)圖及鼓風(fēng)機總圖，并對鼓風(fēng)機的喘振和噪聲進行分析。 通過上述工作，最后得到了多變效率為 %，葉輪葉片為長短葉片的單級曝氣離心式鼓風(fēng)機。 關(guān)鍵詞 ： 離心式鼓風(fēng)機，污水處理， 設(shè)計計算， 噪聲，喘振 重慶大學(xué)本科學(xué)生畢業(yè)設(shè)計（論文） ABSTRACT II ABSTRACT In the design conditions, the wind pressure is 30kPa ~ 200KPa or pression ratio e = ~ 3 called the blower fan. The use of a wide range of blowers, according to its different effects, blowers used in all aspects of production and daily used a large number of metallurgical, chemical, fertilizer, petrochemical, food, building materials, petroleum, mines, textile, gas stations, pneumatic conveying, sewage treatment and other industrial ,in sewage treatment, the use of most of the blower is Roots blowers and centrifugal blowers. In the design, useing the given design parameters： Inlet pressure 1 kg f / m (A)，Temperature of 20176。 C， 80% relative humidity， Into the gas flow 100 m3/min， Discharge pressure (G) and the actual situation of sewage treatment plants to the thermodynamic calculation and structural determine the pressure ratio, according to the design pressure ratio to determine the number of segments of the blower. When the pressure ratio 3, the number of segments is 1. Because of this design pressure ratio of , so the number of segments is 1. Secondly, the physical parameters of the gas is calculated, calculate the gas constant of moist air and fixed entropy. Again, the use of efficient superposition method, mainly useing principles of centrifugal pressor which Xu Zhong written to the suction chamber, impeller, diffuser and volute detailed design calculations. Finally, the impeller wheel and blade strength check, draw the impeller, volute sThrough this worktructure and general layout blower, and blower surge and noise analysis. Through this work,finally,the singlestage aeration centrifugal blower which the Variable efficiency is % with long and short impeller blade e out. Key words： centrifugal blowers, sewage treatment, design calculations， noise, surge 重慶大學(xué)本科學(xué)生畢業(yè)設(shè)計（論文） 目錄 III 目 錄 中文摘要 ................................................................................................ Ⅰ ABSTRACT ........................................................................................... Ⅱ 1 緒論 ......................................................................................................1 離心式鼓風(fēng)機發(fā)展史 ..............................................................................1 離心式鼓風(fēng)機的研究現(xiàn)狀 ........................................................................1 課題研究的環(huán)境背景 ..............................................................................2 ...............................................................................3 2 離心式鼓風(fēng)機的基本原理 ..................................................................4 離心式鼓風(fēng)機原理及工作過程 ..................................................................4 ............................................................................5 轉(zhuǎn)子 .............................................................................................5 靜子 .............................................................................................5 離心式鼓風(fēng)機關(guān)鍵參數(shù) ...........................................................................6 離心式鼓風(fēng)機設(shè)計方法 ...........................................................................7 3 離心式鼓風(fēng)機具體設(shè)計計算 ...............................................................8 熱力計算及結(jié)構(gòu)參數(shù)設(shè)計 ........................................................................8 氣體的物理參數(shù) ..............................................................................8 流量計算 .......................................................................................8 壓力比的確定 .................................................................................8 葉輪設(shè)計 .............................................................................................9 葉輪主 要參數(shù)的設(shè)計計算 ..................................................................9 葉輪的詳細計算 ............................................................................ 10 進氣室設(shè)計 ........................................................................................ 14 擴壓器設(shè)計 ........................................................................................ 14 蝸殼設(shè)計 ........................................................................................... 17 軸耗功率計算 ..................................................................................... 18 多變效率校核 ..................................................................................... 19 葉片數(shù)校核 ..