【正文】 圖《彎曲疲勞壽命系數(shù)YNT》查得YNT1＝Y(jié)NT2＝1由式得故則齒根彎曲強(qiáng)度校核合格。確定有關(guān)系數(shù)與參數(shù)：（1）齒形系數(shù)YF由表《標(biāo)準(zhǔn)外齒輪的齒形系數(shù)YF》查得：YF1＝，YF2＝。mm（2）載荷系數(shù)，查表《載荷系數(shù)》表取K=（3）齒數(shù)z1和齒寬系數(shù)ψd小齒輪齒數(shù)z1取25，又傳動比為3..5，則大齒輪齒數(shù)z2≈88，因直齒圓柱齒輪傳動為對稱布置，而齒輪齒面又為軟齒面，由表《齒寬系數(shù)》取齒寬系數(shù)ψd =1（4）許用接觸應(yīng)力由《接觸疲勞強(qiáng)度極限》圖查得σHlim1＝560MPa，σHlim2＝530MPa由表《安全系數(shù)SH和SF》查得安全系數(shù)SH＝1N1＝60njLh＝6014401（85240）＝109N2＝N1/i＝108/＝108查圖《接觸疲勞壽命系數(shù)》得ZNT1＝1，ZNT2＝由式可得[σH] 1＝ZNT1σHlim1/ SH＝1560/1 MPa＝560 MPa[σH] 2＝ZNT2σHlim2/ SH＝530/1 MPa＝ MPa故由表《漸開線齒輪的模數(shù)》取標(biāo)準(zhǔn)模數(shù)m＝2主要尺寸計算（1）分度圓直徑dd1＝m z1＝225mm＝50mmd2＝m z2＝288mm＝176mm（2）齒寬bb2＝b＝ψd因為是普通減速器，查表《常見機(jī)器中齒輪的精度等級》得，直齒圓柱齒輪應(yīng)選擇8級精度。驗算齒輪的圓周速度v由表《常用精度等級齒輪的加工方法》可知選8級精度是適合的。（2）應(yīng)力修正系數(shù)YS由表《標(biāo)準(zhǔn)外齒輪的應(yīng)力修正系數(shù)YS》查得：YS1＝，YS2＝。d1＝175mm＝75mmb1＝b2＋5mm＝80mm（3）標(biāo)準(zhǔn)中心距a（4）齒頂圓直徑da（我國規(guī)定的標(biāo)準(zhǔn)值為h a＊＝1，c＊＝）齒頂高h(yuǎn) a＝h a＊m＝m＝3mmd a1＝d1＋2h a＝75＋23=81mmd a2＝d2＋2h a＝195＋23=201mm（5）齒根圓直徑df齒根高h(yuǎn) f＝（h a＊＋c＊）m＝ m＝d f1＝d1－2h f＝75－2=d f2＝d2－2h f＝195－2=按齒根彎曲疲勞強(qiáng)度校核根據(jù)式則校核合格。按齒輪面接觸疲勞強(qiáng)度設(shè)計因兩齒輪均為鋼質(zhì)齒輪，可由下式可求出d1值，先確定有關(guān)參數(shù)與系數(shù)：（1）轉(zhuǎn)矩T1 T1=105N（二）直齒圓柱齒輪Ⅱ的傳動設(shè)計選擇齒輪材料及精度等級小齒輪選用45鋼調(diào)質(zhì)，硬度為220250HBS；大齒輪選用45鋼正火，硬度為170210HBS。（3）許用彎曲應(yīng)力[σF]由圖《試驗齒輪的彎曲疲勞極限》查得σHlim1＝210MPa，σHlim2＝190MPa由表《安全系數(shù)SH和SF》查得SF＝，由圖《彎曲疲勞壽命系數(shù)YNT》查得YNT1＝Y(jié)NT2＝1由式[σF] ＝Y(jié)NTσHlim/SF得故所以，齒根彎曲強(qiáng)度校核合格。確定有關(guān)系數(shù)與參數(shù)：（1）齒形系數(shù)YF由表《標(biāo)準(zhǔn)外齒輪的齒形系數(shù)YF》查得：YF1＝，YF2＝。=70176。δf2＝δ2θf2＝74176。4176。=77176。δa2＝δ2+θa2＝74176。+3176。θf1＝θf2＝arctan(hf/R)=arctan()=4176。=74176。－δ1＝90176。時，齒面按接觸疲勞強(qiáng)度的校核公式為設(shè)計公式為可求出d1值，先確定有關(guān)參數(shù)與系數(shù)：（1）轉(zhuǎn)矩T1 T1=291N因為是減速器外的錐齒輪，并經(jīng)查表《常見機(jī)器中齒輪的精度等級》得，錐齒輪應(yīng)選擇8級精度。η4＝＝ kW各軸輸入轉(zhuǎn)矩Ⅰ軸Ⅱ軸Ⅲ軸主軸： 運(yùn)動和動力參數(shù) 軸名 參數(shù)Ⅰ軸Ⅱ軸Ⅲ軸主軸轉(zhuǎn)速n/（r/min）輸入功率P/kW輸入轉(zhuǎn)矩T/（Nη1η3η3η1取η1＝、η2＝、η3＝、η4＝。一般按由電動機(jī)至絞車機(jī)之間運(yùn)動傳遞的路線推算各軸的運(yùn)動和動力參數(shù)。（4）在兩級減速器中，高速級和低速級的大齒輪直徑應(yīng)盡量相近，以利于浸油潤滑。但兩級減速器的總中心距和總傳動比相同時，傳動比分配方案不同，減速器的外廓尺寸也不同。在分配兩級傳動比時主要應(yīng)考慮以下幾點(diǎn)：（1）兩級傳動的傳動比應(yīng)在推薦的范圍內(nèi)選取。因圓錐齒輪傳動比i3＝，所以兩級圓柱齒輪傳動比對于展開式兩級圓柱齒輪減速器，推薦高速級傳動比i2＝（～）i1，又i1按已知的工作要求和條件，選用Y型全封閉籠型三相異步電動機(jī)。交流電動機(jī)有異步電動機(jī)和同步電動機(jī)兩類，異步電動機(jī)又分為籠型和繞線型兩種，其中以普通籠型異步電動機(jī)應(yīng)用最多。應(yīng)按照工作機(jī)的要求，根據(jù)選擇的傳動方案選擇電動機(jī)的類型、容量和轉(zhuǎn)速，并在產(chǎn)品目錄中查出其型號和尺寸。 工作條件和技術(shù)資料：工作條件工作期限工作班制載荷性質(zhì)生產(chǎn)方式8年單班制輕微成批生產(chǎn)技術(shù)數(shù)據(jù)主軸轉(zhuǎn)速電動機(jī)功率電動機(jī)轉(zhuǎn)速圓錐齒輪傳動比n=45r/minP=n=1500r/mini=動力來源電動機(jī)，三相交流，電壓380/220V其它要求單向運(yùn)轉(zhuǎn)，總減速比允差177。采用兩級圓柱齒輪減速器，由于齒輪相對于軸承為不對稱布置，因而沿齒向載荷分布不均，要求軸有較大剛度，應(yīng)此選用展開式。 機(jī)械傳動The Design of The Plate Mill’s GearJia GenqinClass of 0601 Machinery ManufacturingAbstract：Wheel gear’s spreading to move is a the most wide kind of the application spreads to move a form in the modern main advantage BE:spreads to move to settle, work than in a moment steady, spread to move accurate credibility, can deliver space arbitrarily sport and the motive of the of two stalks；Power and speed scope；applies are wide；spreads to move an efficiency high；work is dependable, service life long；Outline size outside the is small, structure tightly wheel gear constituted to；from wheel gear, stalk, bearings and box body decelerates a machine, useding for prime mover and work machine or performance organization of, have already matched to turn soon and deliver a function of turning , the application is extremely extensive in the modern machine. Local deceleration machine much with the wheel gear spread to move, the pole spread to move for lord, but widespread exist power and weight ratio small, or spread to move ratio big but the machine efficiency lead a low are also many weaknesses on material quality and craft level moreover, the especially large deceleration machine’s problem is more outstanding, the service life isn’t deceleration machine of abroad, with Germany, Denmark and Japan be placed in to lead a position, occupying advantage in the material and the manufacturing craft specially, decelerating the machine work credibility like, service life it spreads to move a form to still take settling stalk wheel gear to spread to move as lord, physical volume and weight problem, don’t also resolve likeThe direction which decelerates a machine to is the facing big power and spread to move ratio, small physical volume, high machine efficiency and service life to grow greatly nowadays the connecting of machine and electric motor body structure is also the form which expands strongly, and have already produced various structure forms and various products of power model close to ten several in the last yearses, control a technical development because of the modern calculator technique and the number, make the machine process accuracy, process an efficiency to raise consumedly, pushed a machine to spread the diversification of movable property article thus, the mold piece of the whole machine kit turns, standardizing, and shape design the art turn, making product more fine, the beauty turns.Bee a set a machine material in 21 centuries medium, the wheel gear is still a machine to spread a dynamic basic tool machine and the craft technical development, pushed a machine to spread to move structure to fly to develop spreading to move the electronics control, liquid in the system design to press to spread to move, wheel gear, take the mixture of chain to spread to move, will bee bee soon a box to design in excellent turn to spread to move a bination of academics that is in spread move the design crosses, will bee new spread a movable property article the important trend of the development.Key words： Reduction gear Bearing gear mechanical drive一、傳動裝置的總體設(shè)計 （一）傳動方案分析傳動裝置的布局要求：在分析盤磨機(jī)傳動裝置方案時，首先應(yīng)該滿足機(jī)械設(shè)計的基本要求，此外還要保證工作可靠，傳動效率高，結(jié)構(gòu)簡單，工藝性能好等，同時應(yīng)注意常用機(jī)械傳動方式的特點(diǎn)及在布局上的要求：（1）帶傳動平穩(wěn)性好，能緩沖吸振，但承載能力小，宜布置在高速級；（2）鏈傳動平穩(wěn)性差，且有沖擊、振動，宜布置在低速級；（3）蝸桿傳動放在高速級時蝸輪材料應(yīng)選用錫青銅，否則可選用鋁鐵青銅；（4）開式齒輪傳動的潤滑條件差，磨損嚴(yán)重，應(yīng)布置在低速級；（5）錐齒輪、斜齒輪宜放在高速級；根據(jù)工作需要，所以，盤磨機(jī)與減速器之間應(yīng)該選用錐齒輪進(jìn)行傳動。 軸承在傳動設(shè)計中的學(xué)科交叉,將成為新型傳動產(chǎn)品發(fā)展的重要趨勢。CNC機(jī)床和工藝技術(shù)的發(fā)展,推動了機(jī)械傳動結(jié)構(gòu)的飛速發(fā)展。近十幾年來,由于近代計算機(jī)技術(shù)與數(shù)控技術(shù)的發(fā)展，使得機(jī)械加工精度，加工效率大大提高，從而推動了