機(jī)械設(shè)計(jì)帶輪大作業(yè)

1、設(shè)計(jì)題目 設(shè)計(jì)驅(qū)動(dòng)離心鼓風(fēng)機(jī)的V帶傳動(dòng) 機(jī)械 院（系） 車輛工程 專業(yè)班級(jí) 093 學(xué)號(hào) 設(shè)計(jì)人 指導(dǎo)教師 完成日期 2010 年 5 月 22 日目錄一設(shè)計(jì)任務(wù)書(shū)····································&#

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13、3;········································5四主動(dòng)帶輪裝配簡(jiǎn)圖設(shè)計(jì)·······

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20、···6五小帶輪裝配圖·············································

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23、3;·····················7設(shè) 計(jì) 計(jì) 算 及 說(shuō) 明結(jié) 果一、設(shè)計(jì)任務(wù)書(shū)1.總體布置主動(dòng)輪1裝在電動(dòng)機(jī)軸上，從動(dòng)輪2裝在鼓風(fēng)機(jī)軸上，兩帶輪中心的水平距離a等于大帶輪直徑的2倍。簡(jiǎn)圖如右圖所示2.原始數(shù)據(jù)電動(dòng)機(jī)型號(hào)：Y112M-4鼓風(fēng)機(jī)轉(zhuǎn)速n2(r/min): 1440一天工作時(shí)間（h）：163.設(shè)計(jì)要求（1）繪制小帶輪裝配圖一張（2）編寫設(shè)計(jì)計(jì)算說(shuō)明書(shū)一份4.設(shè)計(jì)內(nèi)

24、容（1）V帶傳動(dòng)的設(shè)計(jì)帶的型號(hào)、根數(shù)、長(zhǎng)度，帶輪尺寸，帶傳動(dòng)中心距，作用下周上的壓力（2）V帶輪的結(jié)構(gòu)設(shè)計(jì)帶輪的材料、結(jié)構(gòu)型式，計(jì)算基本結(jié)構(gòu)尺寸等。二、V帶傳動(dòng)的設(shè)計(jì)由已知的電動(dòng)機(jī)型號(hào)Y112M-4，查參,可得電動(dòng)機(jī)的額定功率P=4kw,滿載轉(zhuǎn)速=1440r/min，傳動(dòng)裝置應(yīng)有的傳動(dòng)比i=1.92，每天工作16小時(shí)1.確定計(jì)算功率Pc由參考表9-6（p230）查得工作情況系數(shù)KA=1.1，故2.選擇V帶的帶型根據(jù)Pc和小帶輪轉(zhuǎn)速由圖9-11（P229）選用A型。3.確定帶輪的基準(zhǔn)直徑并驗(yàn)算帶速v（1）初選小帶輪的基準(zhǔn)直徑dd1，由P230的表9-7，可取小帶輪的基準(zhǔn)直徑dd1=150mm。=

25、i×dd1=288mm再由表9-7基準(zhǔn)直徑系列選=280mm。取=0.015，則實(shí)際傳動(dòng)比i=1.90，傳動(dòng)比偏差為1.04%。（2）驗(yàn)算帶速v因?yàn)?m/s<v<25m/s，故帶速合適。4.確定V帶的中心距a和基礎(chǔ)長(zhǎng)度Ld初選中心距為0.7×（）2×（）。得301860.所以初選=550.由P219的表9-2選帶的基準(zhǔn)長(zhǎng)度Ld=1800mm則實(shí)際中心距中心距的變化范圍527.5608.5mm而題目要求所以取a=560mm，留出適當(dāng)?shù)闹行木嗾{(diào)整量。5.驗(yàn)算小帶輪上的包角1>符合包角要求6.計(jì)算帶的根數(shù)Z(1)計(jì)算單根V帶的額定功率由dd1=150m

26、m和=1440r/min，由 P226頁(yè)的表9-3得P0=2.5kw根據(jù)=1440r/min，i=1.92和A型帶，由 P227頁(yè)的表9-5得P0=0.15kw參考書(shū)目P227頁(yè)的表9-4得K=0.968，P219頁(yè)的表9-2得KL=1.01(2)計(jì)算V帶的根數(shù)z取3根7.計(jì)算單根V帶的初拉力的最小值（F0）min由參考書(shū)目表9-1得A型帶的單位長(zhǎng)度質(zhì)量q=0.1kg/m應(yīng)使帶的實(shí)際拉力F0>（F0）min8.計(jì)算壓軸力壓軸力的最小值為三、V帶輪的結(jié)構(gòu)設(shè)計(jì)1.帶輪的材料由于帶速v=11.3m/s<30 m/s，選擇HT1502.帶輪的結(jié)構(gòu)形式（1）小帶輪的結(jié)構(gòu)形式選擇小帶輪的基準(zhǔn)直

27、徑dd1=150mm，其軸孔直徑需根據(jù)電動(dòng)機(jī)的外伸軸尺寸決定，由機(jī)械設(shè)計(jì)手冊(cè)查的，安裝小帶輪軸直徑d=28mm，當(dāng)2.5d300mm時(shí)，帶輪常采用腹板式帶輪結(jié)構(gòu)。取d1=52mm，由參考書(shū)目P220頁(yè)的圖9-5查的選擇腹板式。（2）大帶輪的結(jié)構(gòu)形式選擇=280<300mm選擇腹板式3.帶輪的基本結(jié)構(gòu)尺寸（1）小帶輪的基本結(jié)構(gòu)尺寸由參考書(shū)目P220頁(yè)的圖 9-5和P218表9-1，得A型帶的輪槽尺寸：節(jié)寬、基準(zhǔn)線上的槽深、基準(zhǔn)線下的槽深、槽間距、第一槽對(duì)稱面至端面的距離輪緣厚、輪槽角帶輪寬B=（z-1）×e+2f取、取50mm外徑、基準(zhǔn)直徑帶輪孔、(2)大帶輪的基本結(jié)構(gòu)尺寸由參考書(shū)目P220頁(yè)的圖 9-5和P218表9-1，得A型帶的輪槽尺寸：節(jié)寬、基準(zhǔn)線上的槽深、基準(zhǔn)線下的槽深、槽間距、第一槽對(duì)稱面至端面的距離輪緣厚、輪槽角帶輪寬B取、外徑、基準(zhǔn)直徑取帶輪孔、四、主動(dòng)帶輪裝配簡(jiǎn)圖設(shè)計(jì)1. 圓頭普通平鍵設(shè)計(jì)由參考書(shū)目P277頁(yè)的表11-9電動(dòng)機(jī)直徑28mm，選擇公稱直徑，公稱尺寸，深度軸，轂，取60mm，檢驗(yàn)鍵連接強(qiáng)度：其中、取