械機(jī)課程設(shè)計(jì)帶式運(yùn)輸機(jī)傳動(dòng)裝置2747

河北聯(lián)合大學(xué)輕工學(xué)院QINGGONGCOLLEGE,HEBEIUNITEDUNIVERSITY 4 8d 8 8 8 1 9 0F………………….10Q 27 28 28 45本設(shè)計(jì)中，原動(dòng)機(jī)為電動(dòng)機(jī)，工作機(jī)為皮帶輸送機(jī)。較(1)電動(dòng)機(jī)類(lèi)型的選擇(2)電動(dòng)機(jī)功率的選擇為了計(jì)算電動(dòng)機(jī)所需功率Pd，需確定傳動(dòng)裝置總效率η總。要求總效率，必須先確定各傳動(dòng)環(huán)節(jié)的效率。由教材查得：ηV帶軸承齒輪=0.99，η=0.96；則傳動(dòng)裝置的總效率為：聯(lián)軸器滾筒電動(dòng)機(jī)所需功率為：Pd=Pw/η總=2.17/0.85=2.55KW對(duì)于載荷比較穩(wěn)定，長(zhǎng)期連續(xù)運(yùn)行的機(jī)械，只要所選電動(dòng)機(jī)的額機(jī)的額定功率為3KW。(3)電動(dòng)機(jī)轉(zhuǎn)速的選擇PKWwη0.85總=總d6(4)確定電動(dòng)機(jī)型號(hào)總總方電機(jī)型額定同步轉(zhuǎn)滿載轉(zhuǎn)堵轉(zhuǎn)最大轉(zhuǎn)矩案號(hào)功率速/速/轉(zhuǎn)矩///KW(r/min(r/min轉(zhuǎn)矩額定轉(zhuǎn)矩L4可以發(fā)現(xiàn)以上兩種電動(dòng)機(jī)都符合要求,都可選取,若工作環(huán)境對(duì)傳動(dòng)裝置的外廓尺寸要求不大,則可選取方案2若工作環(huán)境希望V帶傳動(dòng)的傳動(dòng)比常用范圍為iv帶=2~4，這里取iV帶=2則i齒輪=i總/iV帶=8.10/2=4.05(單級(jí)圓柱齒輪傳動(dòng)的傳動(dòng)比常用范圍為i=3~5)齒輪V帶iV帶i=4.05齒輪7m0dnn=960r/minP=2.55KW0=m0n960r/min0000=01001V帶n=n/i=960/2=480r/minP=2.45KW1001帶1n=480r/min111112112軸承齒輪n=n/i=480/4.05=118.52r/minP=2.33KW2mn=118.52222r/min28率率效η3n=n=118.52r/minn=118.52323mr/min3333.3648.70(r/mi0251ddAdAAd0d=125mm。d101000)=6.28m/sdd型 d=250mm9d201d1 d00ad1d20d1d200a0Ldd00d1d2d1d2：0=1847.34mmdLdLddd0dd0mindmaxd 11d2d1100Ld0d00L×1.01)=2.12Z=2F0Q01Qd1d=250d2mmdmm0QHlim1aσ=180×0.87+380=536.6MPHlim2a[σ]=700MPH1aH1Hlim1Ha[σ]=σ/S=540/1=536.6MPH2Hlim2Ha[σ]=536.6H2MPa13(536.6)1(4.05)3(536.6)1(4.05)1212Δi=|i-i’|/i=|4.05-101/2/4.05=|4.05-4.04|112211a22a11a22a1121212121212h.5mmS4mm12δ=(3~4)m=6~8(mm)取δ=80022022D=0.5(D+D)=0.5(67+180)=118(mm)012d=0.25(D-D)=0.25(181-67)0210Flim1aFlim2aFF1Flim1Fa[σ]=σ/S=401/1.4=286.43MPF2Flim2FaY=4.21FS1Y=3.96F11FS11aF1σ=σ×(Y/Y)=×(3.96/4.21)=92.58MP<[σ]FF1FS2FS1aF2[σMPa[σF2]=286.43MPaF1aF2a111000)=1.26m/s σ=640MPa。b2.45/480)=19.55mm1n=n=480r/min1d=22mm。d=22mm11111223737 64L4=L6=10mm1a1f11511223737464651l。11lmm trQTtrttrAYAZBYBZF、F、F、F。AYAZBYBZBAYrQYBYQAYrF=938.66NYF=-873.52NBAZtF=-974NZF+F+F=0AZtBZ-974+1948+F=0F=-974NZF-1948=-974NBZXZXYXZ-1WMM12132mm，LT6J111m112=20+33=53mm。22m2333m34456664455661l。111 trtrttrAYAZBYBZF、F、F、F。AYAZBYBZAYBYYF+F+F=0rAYBYF=F=-F/2=AYBYrFAYBYAYAZFAZBZZF+F+F=0F=-935.9NtAZBZAZF=F=-F/2=-935.9NF=-935.9NAZBZtBZc)作出合成彎矩圖M=√M2+M2XYXZdd)作出扭矩圖-1W1MM2F=938.66NF=-974NAYAZA=1352.68NF=-873.52NF=-974NBYBZF=√873.522+9742=1308.32NBABNtprhtrp/(1.1×1352.68)]3/(60×480)=78237.61h>38400hL=78237.61hh>F=-336.92NF=-935.9NAYAZABABAtprC=17000Nrhtrp/(1.1×994.70)]3/(60×118.52)=527411h>38400hp1p