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本科畢業(yè)論文-自動(dòng)洗衣機(jī)行星齒輪減速器的設(shè)計(jì)(存儲(chǔ)版)

2025-02-11 05:40上一頁面

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【正文】 n multiple names and titles for the same person. The first half hour must be a swamp to wade through, very much like my experience of getting through a Tolstoy tome with its endless inflections of names transliterated into lengthy Chinese. I see the choice of verbatim translation as an effort for conveying exotica. It is fairly petent, with no error that I could detect, but fails to rise above words or capture the essence of the language. A cultural product usually crosses over to a foreign territory first by an emphasis on the monalities. But whether inside or outside China, the temptation to sell it for the differences is just too great. Sure, the sumptuous sets and costumes are a big attraction, but the narrative technique has bee- how shall I put it?- a bit anglicized, which is necessary for cultural export. Judging by the responses, this legend, which, contrary to the claim of the English trailer, is totally fictitious, has departed from China but not yet landed on American shores. I am a big fan of Ralph Waldo Emerson39。t just about sharing art with nomadic families but also about gaining inspiration for the music and dance. Ulan Muqir literally translates as red burgeon, and today39。 同時(shí)由于本人能力和經(jīng)驗(yàn)有限,在設(shè)計(jì)過程中難免會(huì)犯很多錯(cuò)誤,也可能有許多不切實(shí)際的地方,還望 老師 能指出當(dāng)中的不足,把減速器做的更完美。又由式 14— 2得 d 3 39。又由式 14— 2得 d 3 /C P n? =(118~ 107) 3 ~ 3 10. 15 /16 00Cd? 取直徑 1d = 確定各軸段的直徑 軸段 1(外端 )直徑最少 1d = 7d , 考慮到軸在整個(gè)減速離合器中的安裝所必須滿足的條件,初定: 2d =, 3d =10mm, 4d =11mm, 5d =, 6d =12mm, 7d =, 8d =18mm。確定有關(guān)參數(shù)與系數(shù)。 (5)均載機(jī)構(gòu)應(yīng)具有一定的緩沖和減振性能;至少不應(yīng)增加行星齒輪傳動(dòng)的振動(dòng)和噪聲。后來通過實(shí)踐采取了對行星齒輪傳動(dòng)的基本構(gòu)件徑向不加限制的專門措施和其他可進(jìn)行自動(dòng)調(diào)位的方法,即采用各種機(jī) 械式的均載機(jī)構(gòu),以達(dá)到各行星輪間載荷分布均勻的目的。ad = 在內(nèi)齒輪 b上所受的 力矩為 bT = wn gbF 39。在此首先確定輸入件中心輪 a在每一套中(即在每個(gè)功率分流上)所承受的輸入轉(zhuǎn)矩為 1T =aT /wn =95491P /wn n=9549 1600=*m 可得 aT =1T *wn = N*m 式中 aT — 中心輪所傳遞的轉(zhuǎn)矩, N*m; 1P — 輸入件所傳遞的名義功率, kw; 圖 52傳動(dòng)簡圖 ( a)傳動(dòng)簡圖 (b)構(gòu)件的受力分析 按照上述提示進(jìn)行受力分析計(jì)算,則可得行星輪 g作用于中心輪 a的切向力為 gaF =20221T / 39。因此,為了簡便起見,本設(shè)計(jì)在行星齒輪傳動(dòng)的 受力分析圖中均未繪出各構(gòu)件的徑向力 rF ,且用一條垂直線表示一個(gè)構(gòu)件,同時(shí)用符號(hào) F代表切向力 rF 。 保證相鄰兩行星輪的齒頂不相碰 —— 鄰接條件 在行星傳動(dòng)中,為保證兩相鄰行星輪的齒頂不致相碰,相鄰兩行星輪的中心距應(yīng)大于兩輪齒頂圓半徑之和,如圖 1— 2 所示 圖 51 行星齒輪 可得 l=2 wa *sin(180 / )o wn > ()agd l=2*2/m*(az +gz )*sin60o =39 3 /2m ()agd =d+2ah =17m 滿足鄰接條件。輸入轉(zhuǎn)速不能太高。 減速器降速同時(shí)提高輸出扭矩,扭矩輸出比例按電機(jī)輸出乘減 速比,但要注意不能超出減速器額定扭矩。同時(shí)它的缺點(diǎn)是:材料優(yōu)質(zhì)、結(jié)構(gòu)復(fù)雜、制造精度要求較高、安裝較困難些、設(shè)計(jì)計(jì)算也較一般減速器復(fù)雜。在 自動(dòng) 洗衣機(jī)中使用行星輪系減速器 就 是利用了行星齒輪傳動(dòng) ,其主要 優(yōu)點(diǎn) 有: 1) 體積小,質(zhì)量小,結(jié)構(gòu)緊湊,承載能力大; 2) 傳動(dòng)效率高; 3) 傳動(dòng)比較大; 4) 運(yùn)動(dòng)平穩(wěn)、抗沖擊和震動(dòng)的能力較強(qiáng)、 噪聲低。 行星齒輪傳動(dòng)根據(jù)基本夠件的組成情況可分為: 2K— H、 3K、及 K— H— V三種。 按傳動(dòng)級數(shù)主要分為:單級、二級、多級;按傳動(dòng)件類型又可分為:齒輪、蝸桿、齒輪 蝸桿、蝸桿 齒輪等。例如圖 11所示為作者擬定的傳動(dòng)方案,適于在惡劣環(huán)境下長期連續(xù)工作。 ( 4)齒形系數(shù) FY 由《參考文獻(xiàn)二 》表 8— 12得 FaY =, FgY =, FbY =; ( 5)應(yīng)力修正系數(shù) sY 由《參考文獻(xiàn)二 》表 8— 13得 saY =, sgY =, sbY =; ( 6)許用彎曲應(yīng)力 ? ?F? 由《參考文獻(xiàn)二 》圖 8— 24得 lim1F? =180MPa, lim2F? =160 MPa ; 由表 8— 9得 Fs = 由圖 8— 25得 1NY = 2NY =1; 由《參考文獻(xiàn)二 》式 8— 14可得 ? ?1F? = 1NY * lim1F? /Fs =180/=138 MPa ? ?2F? = 2NY * lim2F? /Fs =160/= MPa 1F? =2K 1T /b 2m az * FaY saY =(2 15) = Mpa ? ?1F? =138 MPa 2F? = 1F? * FgY sgY / FaY saY = =? ?2F? = MPa 齒根彎曲疲勞強(qiáng)度校核合格。 ( 3) 為了求得構(gòu)件上兩個(gè)平行力的比值,則應(yīng)研究它們對第三個(gè)力的作用點(diǎn)的力矩。ad = 內(nèi)齒輪作用于行星輪 g的切向力為 bgF = agF =2022aT /wn 39。ad = *m 式中 39。 (2) 均載機(jī)構(gòu)的補(bǔ)償動(dòng)作要可靠、均載效果要好。 靜 不定系統(tǒng) 均載機(jī)構(gòu): 基本構(gòu)件浮動(dòng)的均載機(jī)構(gòu) (1) 中心輪 a浮動(dòng) ( 2)內(nèi)齒輪 b浮動(dòng) ( 3) 轉(zhuǎn)臂 H浮動(dòng) ( 4)中心輪 a與轉(zhuǎn)臂 H同時(shí)浮動(dòng) ( 5)中心輪 a與內(nèi)齒輪 b同時(shí)浮動(dòng) ( 6)組成靜定結(jié)構(gòu)的浮動(dòng) 杠桿聯(lián)動(dòng)均載機(jī)構(gòu) 本次所設(shè)計(jì)行星齒輪是靜定系統(tǒng),基本構(gòu)件中心輪 a浮動(dòng)的均載機(jī)構(gòu)。 4)許用接觸應(yīng)力 ? ?H? 由《參考文獻(xiàn)四》 圖 10— 24查得 lim1H? =560Mpa, lim2H? =530 Mpa 由《參考文獻(xiàn)四》表 10— 10查得 HS =1 1N =60nj hL =60 1600 1 (10 52 40)= 910 2N = 1N /i= 910 由《參考文獻(xiàn)四》圖 10— 27可得 1NTZ = 2NTZ =。tantFa= tan 020 = 法向力: nF = tF /cos39。 按設(shè)計(jì)結(jié)果畫出軸的結(jié)構(gòu)草圖:見圖 73 圖 73 輸出軸 校核軸: a、受力分析圖 見圖 圖 74 受力分析圖 (a)水平面內(nèi)彎矩圖 (b)垂直面內(nèi)的彎矩圖 (c)合成彎矩圖 (d)轉(zhuǎn)矩圖 圓周力: tF = 112/Td=2 徑向力: rF = 39。s Shaanxi province pass through a stop on the ancient Silk Road, Gansu39。s Poly Theater. Their show, titled Ulan Muqir on the Grassland, depicted the history and development of the art troupe. Being from the region allowed me to embrace the culture of Inner Mongolia and being a member of the troupe showed me where I belonged, Nasun, the art troupe39。s own path. He urges the reader to find rectitude and lead a moral life. He professes that, only by being self reliant, as opposed to relying on the government and being dictated to by society, can one begin leading a decent and purposeful life. He avers that such a life is the only life worth living. I agree with him. This essay was written during a time of social upheaval in America, and it is rather odd that Emerson authored it, as he was a part of the upper crust of society at the time. It just so happened that he looked around him, at the indolence and the wantonness of the people in his circle。s lost, I believe, are the interesting setups and pauses that illuminate the Chinese art of storytelling. Much of the plot is still there. It is the flavor that was sacrificed. The American edition uses the framework of the Empress Dowager in her senior years reminiscing at the beginning and the end of each episode, hinting at what39。t have a formal stage. The audience just sat on the grass. Usually, the performances became a big party with local people joining in. For him, the rewarding part about touring isn39。 第八章 結(jié)論 本文是關(guān)于 自動(dòng)洗衣機(jī)減速離合器內(nèi)部減速裝置,這種減速器對于體積和重量方面要求較高,在設(shè)計(jì)過程中不僅要注意這些,同時(shí)也要在精度上下些力氣,因?yàn)榫?不高,在洗衣機(jī)運(yùn)行中產(chǎn)生的震動(dòng)和噪音就越大, 隨著 人們對家電的要求逐漸提高和科技的日益發(fā)展 ,洗衣機(jī)是家用電器中常見的一種
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