中英文翻譯-- v帶傳動

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</b></p><p>　　摘要：v帶傳動被廣泛應用于各種機械中，因此去理解它并知道如何去設計它是十分必要的。V帶和帶輪是v帶傳動的兩個最重要的組成部分，中心距、帶輪直徑和轉速是v帶傳動中最基本的參數(shù)。V帶傳動包含一個主動輪和一個從動輪，我們根據(jù)傳動比來設計它們的直徑</p><p>　　關鍵詞：v帶傳動 中心距 帶輪 直徑 傳動比 </p

28、><p>　　v帶傳動裝置包括一個主動皮帶輪、一個從動皮帶輪和一個無接頭的繞兩帶輪旋轉的v形帶。這樣的v帶傳動裝置需要有一個扭矩測量裝置，為此要在主動輪和從動輪上都要裝有速度測量器，它能連續(xù)地、時時地檢測出皮帶輪的轉速。這兩個速度測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)帶輪轉速確定主、從動輪之間的傳動比，另外還有一個校準裝置，它能在限定的扭矩范圍內(nèi)幫助設定傳動比，它是與電子控制裝置連接在一起的。<

29、;/p><p>　　V帶設計還要牽涉到v帶傳動裝置的預防保護措施，即如何能方便地針對不同的傳動負載來確定最佳的扭矩，并能具有協(xié)調(diào)v帶傳動的功能。比如，協(xié)調(diào)控制主、從動輪和v帶之間的傳動。</p><p>　　V帶傳動及其設計是要得益于扭矩測量裝置，該裝置利用v帶在主、從動輪輪槽內(nèi)的置入深度去測量兩者之間的扭矩差，而這種差別通常被稱為滑差而忽略不計，就像齒輪的傳動比略有變化一樣。不過，與齒輪相比

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

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

32、可通過調(diào)節(jié)轉速和傳動比去適應扭矩，從而可使v帶傳動以最優(yōu)化運行。</p><p>　　以上具體的描述比較全面地展現(xiàn)了其他設計所具有的一般思路、性質，就是要充分地應用所學的知識去設計，并且要能隨時地調(diào)整和修改所設計的東西以滿足不同的需要。這些具體的設計當然也離不開一般的設計理念。因此，這些改進和修正應當在展現(xiàn)具體設計的意義和作用的前提下傾向于更加復雜化。由此不難明白我們所學的專業(yè)術語或專門用語是用于對設計進行描述的

33、，而不是用來限制的。</p><p>　　理解以上理論的目的是為了進行v帶傳動的設計?？偟脑O計要求是得到最優(yōu)中心距和最小直徑。當然，設計者在開始設計之前會有一些已知條件，比如小帶輪的轉速、傳東比（或從動輪的轉速）、所需傳遞的功率、v帶傳動的工作狀況。最終的目的是使v帶傳動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帶傳動的重要組成部分。因此，去理解v

34、帶的結構并選用它是十分重要的。人造纖維v帶和橡膠v帶是在動力傳遞中應用最廣泛的，這樣的帶有兩種系列：標準v帶和高性能v帶。這種帶在工作時要有一個較小的中心距，并且?guī)菬o接頭的。V帶的其中一個優(yōu)點是花費低，并且可以通過并行增加v帶的方法來增加傳遞功率，但是，所有參加傳動的v帶都應以同樣的頻率運行，以使載荷能在所有帶上平均分配；當其中一個帶損壞時，整個這組帶應當被換下來。該傳遞可以以任意角度傾斜，不論緊邊是在上還是在下。V帶傳動的另一個優(yōu)點

35、是帶槽的傾角是在34度~38度，帶的側面與槽內(nèi)側面之間的摩擦作用使帶所傳遞的力更大。</p><p>　　帶傳動的另外一個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，灰鑄鐵應用最廣。當帶速v<=25m/s時，應當采用HT150;當v=25—30m/s時，應當采用HT200；當v>=25—45m/s時，則應采用球墨鑄鐵、鑄鋼或鍛鋼，也可采用鋼板沖壓后焊接帶輪。小功率傳動時，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，傳動比的合理改變得到了保證。通常，小帶輪用作主動輪，大帶輪被用作從動輪。</p><p>　　了解了帶傳動的一般結構之后，還要對帶傳動進行受力分析，其中主要是帶的受力分析，帶的受力主要是拉力和應力兩種，其中應力又可以分為拉應力、彎曲應力和離心應力。在設計時，應當使拉力和應力之和均小于帶的極限