【正文】 技術(shù)，．[27] 許立寧．樹脂含量對濕式離合器碳質(zhì)磨擦材料摩損性能的影響，工藝材料設(shè)備，2001，2（3）：17～19致謝本文是在指導(dǎo)教師李學(xué)慧老師的悉心指導(dǎo)下完成的，李老師嚴謹?shù)闹螌W(xué)作風(fēng)和無私的敬業(yè)精神是我學(xué)習(xí)的典范。李老師循循善誘、誨人不倦的指導(dǎo)作風(fēng)，淵博的知識和敏捷的思維，使我受益匪淺。李老師在學(xué)術(shù)上高瞻遠矚，始終站在學(xué)科最前沿，總是給予恰如其分的指導(dǎo)，使我們能夠順利完成論文。在此，謹對李老師在學(xué)業(yè)上的指導(dǎo)表示崇高的敬意，對老師在工作及生活上的關(guān)心和幫助表示衷心的感謝！附錄Transmission designAs we all know automobile engine to a certain speed can be achieved under the best conditions, when pared issued by the power, fuel economy is relatively good. Therefore, we hope that the engine is always in the best of conditions to work under. However, the use of motor vehicles need to have different speeds, thus creating a conflict. Transmission through this conflict to resolve.Automotive Transmission role sum up in one sentence, called variable speed twisting, twisting or slow down the growth rate by increasing torsional. Why can slow down by twisting, and the growth rate but also by twisting? For the same engine power output, power can be expressed as N = WT, where w is the angular velocity of rotation. When N fixed, w and T is inversely proportional to the. Therefore, the growth rate will reduce twisting, twisting slowdown will increase. Automotive Transmission speed gear based on the principle of variable twisted into various stalls of different transmission ratio corresponding to adapt to different operational conditions. General to set up a manual gearbox input shaft, intermediate shaft and output shaft, also known as the threeaxis, as well as Daodang axis. Threeaxis is the main transmission structure, input shaft speed is the speed of the engine, the output shaft speed is the intermediate shaft and output shaft gear meshing between different from the speed. Different gears are different transmission ratio, and will have a different speed. For example Zhengzhou richan ZN6481W2G manual transmission carSUV, its transmission ratio are: 1 File :1。 stalls :1。 stalls :1。 stalls 1:1 5 stalls (speeding file) : 1. When drivers choose a launch vehicle stalls, Plectrum will be 1 / 2 file synchronization engagement with a back stall gear and output shaft lock it, the power input shaft, intermediate shaft and output shaft gear of a stall, a stall the output shaft gear driven, and the output shaft power will be transmitted to the drive shaft (red arrow). A typical stall Biansuchilun transmission ratio is 3:1, that is to say three laps to the input shaft and output shaft to a circle. When the growth rate of car drivers choose two stalls, Plectrum will be 1 / 2file synchronization and file a joint separation after 2 stall and lock the output shaft gear, power transmission line similar, the difference is that the output shaft gear of a stall 2 stall replaced by the output shaft gear driven. 2 stall Biansuchilun typical transmission ratio is :1, laps to the input shaft and output shaft to a circle than a stall speed increase, lower torque. When refueling vehicle drivers growth stalls option 3, Plectrum to 1 / 2 back to the free filesynchronization position, and also allows the 3 / 4 file synchronization Mobile stall until 3 in the output shaft gear lock, power can be into the shaft axis intermediate shaft the output shaft of the three stalls Biansuchilun, led through three stalls Biansuchilun output shaft. 3 stalls typical transmission ratio is :1, laps to the input shaft and output shaft to a circle is further growth. When car drivers Option 4 refueling growth stalls, Plectrum will be 3 / 4 from the 3file synchronization stall gear directly with the input shaft gear joint initiative, and power transmission directly from the input shaft to the output shaft, the transmission ratio at 1:1, that the input shaft and output shaft speed the same. The driving force without intermediate shaft, also known as direct file, the file transmission than the maximum transmission efficiency. Most cars runtime files are used directly to achieve the best fuel economy. Shift into the first interval when, in a free transmission when Biansuchilun output shaft is not locked in, they cannot rotate the output shaft driven, not power output. General automotive manual transmission than the main 14 stalls, usually the first designers to determine the minimum (one stall) and maximum (4 files) transmission ratio, the middle stall drive by geometric progression than the general distribution. In addition, there are stalls Daodang and speeding, speeding file is also known as the five stalls. When the car to accelerate to more than car drivers with the choice of five stalls, and a typical fivetransmission ratio is :1, which is driven by a pinion gear, the gear when the initiative to zone, passive gear have been transferred to a circle of the End. Dao Dang, the opposite direction to the output shaft rotation. If one pair of meshing gears when we reverse rotation, with a middle gear, it will bee the same to the rotation. Use of this principle, we should add a gear Daodang the media will be rotational direction reversed, it will have a Daodang axis. Daodang installed in the transmission shaft independent crust, and the intermediate shaft parallel axis gear with the intermediate shaft and output shaft gear meshing gears, will be contrary to the output shaft. Daodang usually used for the synchronization control also joins five stalls, stalls and Daodang 5 position in the same side. As a middle gear, the general transmission Daodang transmission ratio greater than 1 file transmission ratio, by twisting, steep slope with some vehicles encountered on the progress stalls falters with a Daodang boost. Ride from the driver of the considerations, better transmission stall, stall adjacent stall more than the transmission changes the ratio of small, and easy to shift smoothly. However, the short ings of the stalls is more transmission structure is plicated, bulky, light vehicle transmission is generally 45 stalls. At the same time, transmission ratio is not integral, but with all o