【正文】 重慶大學(xué)本科學(xué)生畢業(yè)設(shè)計(jì)（論文） 離心式鼓風(fēng)機(jī)設(shè)計(jì) 學(xué) 生： *** 學(xué) 號(hào)： ****** 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(dòng)力工程 重慶大學(xué)動(dòng)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(jì)（論文） 中文 摘要 I 摘 要 在設(shè)計(jì)條件下， 風(fēng)壓 為 30kPa~200KPa 或壓力比 e=~3 的 風(fēng)機(jī) 叫鼓風(fēng)機(jī)。 鼓風(fēng)機(jī)的用途非常廣泛， 根據(jù)其不同功效，鼓風(fēng)機(jī)應(yīng)用于生產(chǎn)、生活中多個(gè)環(huán)境中。它 大量運(yùn)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(mén) 。其中，在污水處理中，運(yùn)用最多的鼓風(fēng)機(jī)有離心式鼓風(fēng)機(jī)和羅茨鼓風(fēng)機(jī)。 本文設(shè)計(jì)的離心式鼓風(fēng)機(jī)主要運(yùn)用于污水處理，根據(jù)給定的的設(shè)計(jì)參數(shù) ： 進(jìn)氣壓力 1 ㎏ f/㎡ (A)， 溫度 20℃ ， 相對(duì)濕度 80%， 進(jìn) 氣流量 100m3/min， 排氣壓力 ㎏ f/㎡ (G)以及污水處理廠的實(shí)際情況，進(jìn)行熱力計(jì)算及其結(jié)構(gòu)設(shè)計(jì)。首先確定壓力比，根據(jù)壓力比來(lái)確定所設(shè)計(jì)的鼓風(fēng)機(jī)的段數(shù)。當(dāng)壓力比 3 時(shí)，其段數(shù)為 1。因?yàn)楸敬卧O(shè)計(jì)壓力比為 ，故鼓風(fēng)機(jī)的段數(shù)為 1。其次對(duì)氣體的物性參數(shù)進(jìn)行計(jì)算，算出濕空氣的氣體常數(shù)和定熵指數(shù)。再次，運(yùn)用效率疊加法，主要根據(jù)徐忠編寫(xiě)的離心壓縮機(jī)原理一書(shū)，對(duì)吸氣室、葉輪、擴(kuò)壓器和蝸殼進(jìn)行詳細(xì)設(shè)計(jì)計(jì)算。最后，對(duì)葉輪輪盤(pán)和葉片進(jìn)行強(qiáng)度校核，畫(huà)出葉輪、蝸殼結(jié)構(gòu)圖及鼓風(fēng)機(jī)總圖，并對(duì)鼓風(fēng)機(jī)的喘振和噪聲進(jìn)行分析。 通過(guò)上述工作，最后得到了多變效率為 %，葉輪葉片為長(zhǎng)短葉片的單級(jí)曝氣離心式鼓風(fēng)機(jī)。 關(guān)鍵詞 ： 離心式鼓風(fēng)機(jī)，污水處理， 設(shè)計(jì)計(jì)算， 噪聲，喘振 重慶大學(xué)本科學(xué)生畢業(yè)設(shè)計(jì)（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(jì)（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(jī)發(fā)展史 ..............................................................................1 離心式鼓風(fēng)機(jī)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(jī)的基本原理 ..................................................................4 離心式鼓風(fēng)機(jī)原理及工作過(guò)程 ..................................................................4 ............................................................................5 轉(zhuǎn)子 .............................................................................................5 靜子 .............................................................................................5 離心式鼓風(fēng)機(jī)關(guān)鍵參數(shù) ...........................................................................6 離心式鼓風(fēng)機(jī)設(shè)計(jì)方法 ...........................................................................7 3 離心式鼓風(fēng)機(jī)具體設(shè)計(jì)計(jì)算 ...............................................................8 熱力計(jì)算及結(jié)構(gòu)參數(shù)設(shè)計(jì) ........................................................................8 氣體的物理參數(shù) ..............................................................................8 流量計(jì)算 .......................................................................................8 壓力比的確定 .................................................................................8 葉輪設(shè)計(jì) .............................................................................................9 葉輪主 要參數(shù)的設(shè)計(jì)計(jì)算 ..................................................................9 葉輪的詳細(xì)計(jì)算 ............................................................................ 10 進(jìn)氣室設(shè)計(jì) ........................................................................................ 14 擴(kuò)壓器設(shè)計(jì) ........................................................................................ 14 蝸殼設(shè)計(jì) ........................................................................................... 17 軸耗功率計(jì)算 ..................................................................................... 18 多變效率校核 ..................................................................................... 19 葉片數(shù)校核 ..