问题 问答题 简答题

简述齿轮传动件的装配要点。

答案

参考答案:

⑴装前准备:

①对零件清洗干净,去除毛刺,并按图纸各项指标检查是否符合要求;

②齿轮与轴的配合面在压入前应涂润滑油。配合面为锥面时,应用涂色法检查接触情况,对接触不良的应进行刮研处理;

③闭式传动的箱体轴心线的中心距和平行度在装配前应予以校验;

④选择合理的装配方法,并准备好共器具。

⑵安装程序:一是对装配式齿轮进行齿轮自身装配;二是齿轮装与轴上;三是齿轮轴装入箱体内;四是对安装后的齿轮啮合状况进行检查调整。

单项选择题
阅读理解

根据短文内容,从短文后的选项中选出能填入空白处的最佳选项。选项中有一项为多余选项。

       _____ 1. Smith is a professor who does research on ancient buildings. This month, his university gives

a reward to him for his great contributions. So now an idea of traveling to a new place to continue his study

has come into his mind.

       _____ 2. Though Lola is a woman reporter, she is brave enough to go deep into the places at war. Next

month, she will go to a place at war, she is confident to do her work well and give people the most brief and

real reports. 

       _____ 3. Alice and Simon are going to get married. They want to hold an underwater wedding in a

special place, which has beautiful scenery, silver sand and delicious seafood and luxurious hotels, where they

can enjoy themselves. 

       _____ 4. Jane is a modern girl, who is a crazy fan of rock music and films. She has a romantic dream,

that is, one day, she will go to a beautiful place to appreciate all the attractive music and films with a cup of

coffee in her hand.

        _____ 5. Tom is really depressed these days. Owing to his bad management, his company closed. He

wants to go to a place to try his fortune so that he can start his business again in the near future.

A. Mauritius, an island lying off the southeast Africa in the Indian Ocean, which is rich in history, natural

     beauty and culture. It is a wonderful place for swimming and diving. The large number of interesting fish 

     means it is also an exciting place for those who like to go fishing.

B. Las Vegas is really a fascinated city. The most attractive thing here is gambling (赌博). Maybe you will

    become a millionaire or lose all your money overnight. What's so clever about Las Vegas is that it makes

    absolutely certain that you have such a good time you don't mind losing a bit of money along the way;

    that's why they don't even call it "gambling" anymore, but "gaming".

C. Few cities leave the visitors with such vivid impressions, the whole city is something of a work of art, the

    quiet River Seine, the Eiffel Tower, Palais du Louvre and so on are really feast to your eyes. And annual

    film festival is held with a refreshing emphasis on art. Few cities can compete with the thousands. of cafés,

     bars and restaurants that line every Parisian street.

D. Kitzbuhel is a paradise for all the skiers. With fine weather and breath-taking scenery, it is a world-class

     ski resort. Every winter, thousands of people come from all parts of the world to challenge themselves.

     If you can't ski, don't worry. The town offers many shops, café and a variety of entertainment.

E. As the cultural centre and biggest centre and biggest city in the region, Jerusalem is regarded as a holy

     place by Jews, Muslims and Christians. However, since the war broke out, people there have suffered a

     lot, the situation has been tense, and peace is just a dream.

F. The old Nile brought about the civilization of Egypt; people there regard it as "the mother river" of them.

     On both sides of the Nile stand noble pyramids which were built as the tombs of the ancient pharaohs

     (法老). And the constructions are beyond people's imagination.