中英文翻譯-- v帶傳動(dòng)

1、<p>　　The V-belt Drive</p><p>　　Abstract: The v-belt drive are widely used in all kinds of machanics , So to understand and know how to design it is very necessary .The v-belt and the pulley are two mos

2、t important parts of v-belt drive ,the centre distance ,the diameter of the pulleys and the rpm of the pulleys are the most essential parameters of the v-belt drive . The v-belt drive has a drive pulley and a power take-

3、off pulley , we design their diameters in the basis of speed ratio .</p><p>　　Key words: v-belt drive centre distance pulley diameter speed ratio </p><p>　　The V-belt drive has a drive p

4、ulley and a power take-off pulley and an endless V-belt rotating around both pulleys. This V-belt drive is equipped with a torque measuring device in that an rpm sensor is assigned to both the drive pulley and the power

5、take-off pulley , which continuously detects the pulley rpm, the two rpm sensors are connected with an electronic control which determines the gear ratio between the drive and the power take-off pulleys from the detecte

6、d rpm, a calibration device, w</p><p>　　The invention relates to the provision of a V-belt drive, where it is possible to determine the torque existing at different drive loads by simple means and in an opti

7、mal manner, as a function of the cooperating parts of the V-belt drive, i.e. drive pulley, power take-off pulley and V-belt, and to control and adjust it in this way. </p><p>　　The V-belt drive in accordance

8、 with the invention is equipped with a torque measuring device, which uses the depth of penetration of the V-belt in the V-belt grooves of the drive and power take-off pulleys, which heretofore often had been considered

9、to be slippage and had not been taken into account, as well as the variable gear ratio caused thereby and compares this gear ratio, which continuously changes as a function of the load on the drive pulley, in an electron

10、ic device with a predetermined</p><p>　　By means of this it is possible in a simple and assured manner to control and adjust the torque; at the same time detect and immediately remedy developing troubles, ov

11、erloads, wear and the like in connection with the various machines and devices to be powered, such as agricultural machinery, industrial machinery and the like.</p><p>　　Differing rotational diameters of the

12、 belt are caused by these differing penetration depths of the V-belt and, because of that, different rpm of the two pulleys. The RPM or gear ratio of the two pulleys is changed by means of this action. To compensate for

13、this action, the RPM or gear ratio is changed by means of the rpm sensors, depending on the load on the drive pulley and the penetration depth into both pulleys of the V-belt . The rpm of both pulleys is continuously det

14、ected by means of the r</p><p>　　In the no-load condition or with a known load of the V-belt drive a calibration is performed in the calibration device by assigning the RPM or gear ratio to a set torque. <

15、;/p><p>　　The foregoing description of the specific embodiments will so fully reveal the general nature of the invention that others can, by applying current knowledge, readily modify and/or adapt for various a

16、pplications such specific embodiments without departing from the generic concept, and, therefore, such adaptations and modifications should and are intended to be comprehended within the meaning and range of equivalents

17、of the disclosed embodiments. It is to be understood that the phraseology or ter</p><p>　　The purpose of understanding the above theorys is to design the v-belt drive. The total design requirement is to get

18、the best distance between the centres of the two pulleys. Of course, the designer has a few known conditions before he/she start the design, such as the rpm of the drive pulley, the gear ratio between the drive pulley an

19、d the power take-off pulley(or the rpm of the power take-off pulley),the power to be transmitted and the work circumstances of the v-belt drive. The final purpose </p><p>　　As known to all,the v-belt is one

20、of the most important part of the v-belt drive. So it is important to comprehend the construction of the v-belt and to choose it .the rayon and rubber v-belt are widely used for power transmission .Such belts are made in

21、 two series: the standard v-belt and the high capacity v-belt .The belts can be used with short certre distances and are made endless .One of the virtues of the v-belt is that the costis low ,and power output may be incr

22、eased by operating several</p><p>　　Another important part of the v-belt drive is the pulley, it may be made of cast iron, sheet steel or die cast metal, gray cast-iron is widely used of all these materials.

23、 When the speed of the V-belt is not more than 25 m/s, we should adopt HT150 as the materials of the pulleys; When the speed is between 25 to 30 m/s, we should use HT200; When the speed is between 25 to 45 , then we can

24、employ nodular cast iron, cast steel or forged steel, we also can weld the punched steel plate to use as the </p><p>　　After we understand the usual structure of the V-belt Drive , we should analyse the forc

25、e of the V-belt , the analysis of the V-belt is more important, the main forces are pulling force and stress, and the stress include pulling stress, bending stress and centrifugal stress. The designer must make the pulli

26、ng force and the stress are not more than the permanent values. In order to avoid the slip slide, we also should make the transmitted power, the pulling force and the speed of V-belt to satisf</p><p><b&g

27、t;　　V帶傳動(dòng)</b></p><p>　　摘要：v帶傳動(dòng)被廣泛應(yīng)用于各種機(jī)械中，因此去理解它并知道如何去設(shè)計(jì)它是十分必要的。V帶和帶輪是v帶傳動(dòng)的兩個(gè)最重要的組成部分，中心距、帶輪直徑和轉(zhuǎn)速是v帶傳動(dòng)中最基本的參數(shù)。V帶傳動(dòng)包含一個(gè)主動(dòng)輪和一個(gè)從動(dòng)輪，我們根據(jù)傳動(dòng)比來設(shè)計(jì)它們的直徑</p><p>　　關(guān)鍵詞：v帶傳動(dòng) 中心距 帶輪 直徑 傳動(dòng)比 </p

28、><p>　　v帶傳動(dòng)裝置包括一個(gè)主動(dòng)皮帶輪、一個(gè)從動(dòng)皮帶輪和一個(gè)無接頭的繞兩帶輪旋轉(zhuǎn)的v形帶。這樣的v帶傳動(dòng)裝置需要有一個(gè)扭矩測(cè)量裝置，為此要在主動(dòng)輪和從動(dòng)輪上都要裝有速度測(cè)量器，它能連續(xù)地、時(shí)時(shí)地檢測(cè)出皮帶輪的轉(zhuǎn)速。這兩個(gè)速度測(cè)量器是用一電子控制裝置相連接的，這種電子控制裝置能根據(jù)帶輪轉(zhuǎn)速確定主、從動(dòng)輪之間的傳動(dòng)比，另外還有一個(gè)校準(zhǔn)裝置，它能在限定的扭矩范圍內(nèi)幫助設(shè)定傳動(dòng)比，它是與電子控制裝置連接在一起的。<

29、;/p><p>　　V帶設(shè)計(jì)還要牽涉到v帶傳動(dòng)裝置的預(yù)防保護(hù)措施，即如何能方便地針對(duì)不同的傳動(dòng)負(fù)載來確定最佳的扭矩，并能具有協(xié)調(diào)v帶傳動(dòng)的功能。比如，協(xié)調(diào)控制主、從動(dòng)輪和v帶之間的傳動(dòng)。</p><p>　　V帶傳動(dòng)及其設(shè)計(jì)是要得益于扭矩測(cè)量裝置，該裝置利用v帶在主、從動(dòng)輪輪槽內(nèi)的置入深度去測(cè)量?jī)烧咧g的扭矩差，而這種差別通常被稱為滑差而忽略不計(jì)，就像齒輪的傳動(dòng)比略有變化一樣。不過，與齒輪相比

30、，帶輪的傳動(dòng)比更容易隨帶輪所傳遞載荷的變化而變化，這種電子測(cè)量裝置中有預(yù)先設(shè)定好的扭矩，它能在扭矩不斷變化的情況下估算出差值，并可由它去進(jìn)行調(diào)節(jié)以得到合適的扭矩。</p><p>　　以這種簡(jiǎn)單而有效的方式不僅可以控制和調(diào)節(jié)扭矩，而且還可以檢測(cè)并及時(shí)消除一些差錯(cuò)、過載、疲勞，在和其他設(shè)備和機(jī)械連接使用時(shí)同樣可以具有這樣的功能，比如在農(nóng)業(yè)機(jī)械和工業(yè)機(jī)械中均有應(yīng)用。</p><p>　　V帶在

31、輪槽中的不同置入深度會(huì)引起v帶有不同的旋轉(zhuǎn)直徑，因此，也會(huì)造成兩帶輪的轉(zhuǎn)速不同，而且?guī)У霓D(zhuǎn)速和傳動(dòng)比也因此而變化。要致力于解決這個(gè)問題，就要明白帶速或傳動(dòng)比是由速度測(cè)量裝置依據(jù)主動(dòng)帶輪的載荷和兩帶輪在輪槽中的置入深度而影響和控制的。兩帶輪的轉(zhuǎn)速是通過測(cè)速器不停地檢測(cè)而得到的，這些數(shù)據(jù)被傳入電子控制裝置，它將依據(jù)此進(jìn)行調(diào)節(jié)而得到一個(gè)新的傳動(dòng)比。</p><p>　　在無載荷或有一已知載荷的v帶傳動(dòng)的情況下，校檢裝置

32、可通過調(diào)節(jié)轉(zhuǎn)速和傳動(dòng)比去適應(yīng)扭矩，從而可使v帶傳動(dòng)以最優(yōu)化運(yùn)行。</p><p>　　以上具體的描述比較全面地展現(xiàn)了其他設(shè)計(jì)所具有的一般思路、性質(zhì)，就是要充分地應(yīng)用所學(xué)的知識(shí)去設(shè)計(jì)，并且要能隨時(shí)地調(diào)整和修改所設(shè)計(jì)的東西以滿足不同的需要。這些具體的設(shè)計(jì)當(dāng)然也離不開一般的設(shè)計(jì)理念。因此，這些改進(jìn)和修正應(yīng)當(dāng)在展現(xiàn)具體設(shè)計(jì)的意義和作用的前提下傾向于更加復(fù)雜化。由此不難明白我們所學(xué)的專業(yè)術(shù)語或?qū)ｉT用語是用于對(duì)設(shè)計(jì)進(jìn)行描述的

33、，而不是用來限制的。</p><p>　　理解以上理論的目的是為了進(jìn)行v帶傳動(dòng)的設(shè)計(jì)?？偟脑O(shè)計(jì)要求是得到最優(yōu)中心距和最小直徑。當(dāng)然，設(shè)計(jì)者在開始設(shè)計(jì)之前會(huì)有一些已知條件，比如小帶輪的轉(zhuǎn)速、傳東比（或從動(dòng)輪的轉(zhuǎn)速）、所需傳遞的功率、v帶傳動(dòng)的工作狀況。最終的目的是使v帶傳動(dòng)在滿足各種工作情況的條件下具有最小的體積。</p><p>　　眾所周知，v帶也是v帶傳動(dòng)的重要組成部分。因此，去理解v

34、帶的結(jié)構(gòu)并選用它是十分重要的。人造纖維v帶和橡膠v帶是在動(dòng)力傳遞中應(yīng)用最廣泛的，這樣的帶有兩種系列：標(biāo)準(zhǔn)v帶和高性能v帶。這種帶在工作時(shí)要有一個(gè)較小的中心距，并且?guī)菬o接頭的。V帶的其中一個(gè)優(yōu)點(diǎn)是花費(fèi)低，并且可以通過并行增加v帶的方法來增加傳遞功率，但是，所有參加傳動(dòng)的v帶都應(yīng)以同樣的頻率運(yùn)行，以使載荷能在所有帶上平均分配；當(dāng)其中一個(gè)帶損壞時(shí)，整個(gè)這組帶應(yīng)當(dāng)被換下來。該傳遞可以以任意角度傾斜，不論緊邊是在上還是在下。V帶傳動(dòng)的另一個(gè)優(yōu)點(diǎn)

35、是帶槽的傾角是在34度~38度，帶的側(cè)面與槽內(nèi)側(cè)面之間的摩擦作用使帶所傳遞的力更大。</p><p>　　帶傳動(dòng)的另外一個(gè)重要組成部分是帶輪，帶輪通常用鑄鐵、薄鋼板或者壓鑄金屬等制成，其中，灰鑄鐵應(yīng)用最廣。當(dāng)帶速v<=25m/s時(shí)，應(yīng)當(dāng)采用HT150;當(dāng)v=25—30m/s時(shí)，應(yīng)當(dāng)采用HT200；當(dāng)v>=25—45m/s時(shí)，則應(yīng)采用球墨鑄鐵、鑄鋼或鍛鋼，也可采用鋼板沖壓后焊接帶輪。小功率傳動(dòng)時(shí)，帶輪可

36、以采用鑄鋁或塑料等材料。帶輪由輪緣、腹板和輪轂三部分組成。市場(chǎng)上帶輪的槽寬是變化不定的，帶輪的有效直徑也是變化不定的，因此，傳動(dòng)比的合理改變得到了保證。通常，小帶輪用作主動(dòng)輪，大帶輪被用作從動(dòng)輪。</p><p>　　了解了帶傳動(dòng)的一般結(jié)構(gòu)之后，還要對(duì)帶傳動(dòng)進(jìn)行受力分析，其中主要是帶的受力分析，帶的受力主要是拉力和應(yīng)力兩種，其中應(yīng)力又可以分為拉應(yīng)力、彎曲應(yīng)力和離心應(yīng)力。在設(shè)計(jì)時(shí)，應(yīng)當(dāng)使拉力和應(yīng)力之和均小于帶的極限