问题 问答题 论述题

WD-320动力稳定车有哪些传动轴?其结构特点是什么?

答案

参考答案:

动力稳定车的传动系统中,共有8根传动轴,分别用于柴油机与变矩器之间、变速箱与分动箱之间、走行液压马达与分动箱之间、分动箱与车轴齿轮箱之间、分动箱与中间支撑之间、中间支撑与车轴齿轮箱之间、振动液压马达与稳定装置之间和两个稳定装置之间的连接,传递柴油机的动力。其结构特点如下:

⑴传动轴一般都为空心轴,在传递同样大小的转矩时,空心轴具有更大的刚度,重量轻,节约钢材;

⑵传动轴转速高,为了避免离心力引起的剧烈振动,要求传动轴的质量沿圆周均匀分布,一般都由钢板卷制焊接而成;

⑶为了保证传动轴运转的平稳性和可靠性,传动轴和万向节组装后都必须进行动平衡试验,用焊接平衡片的办法使之平衡。平衡后应在叉和轴上刻上记号,以便拆装时确保原来的相对位置;

⑷花键传动轴在花键套中可以伸缩,但是伸缩量不能大于长度补偿量。必须保证传动轴在各种情况下,既不脱开又不顶死。

阅读理解

Is it difficult for you to get up in the morning? Hiroyuki’s bed will solve your problem! Here is how it works.

  The bed is connected to an alarm clock(闹钟). First, the alarm clock rings. You have a few minutes to wake up. Next, a tape recorder in the bed plays soft music. The tape recorder in Hiroyuki’s bed plays a recording of his girlfriend. She whispered in a soft voice, “Wake up, darling, please.” After minutes later, Hiroyuki hears a recording of his boss. His boss shouts, “Wake up at once, or you’ll be late!”

If you don’t get up after the second recording, a mechanical(机械的) “foot” in the bed will kick you in the head. The bed waits a few more minutes. What! You’re still in bed! Slowly the top of the bed rises higher and higher. The foot of the bed goes lower and lower. Finally you slide(滑落) off the bed and onto the floor. You are out of bed awake!

  Hiroyuki’s bed is not in stores. There is only one bed — the bed Hiroyuki made for a contest(比赛). Maybe someday a company will make Hiroyuki’s bed and sell it in stores. Maybe people will buy millions of beds. Then Hiroyuki will be rich. If the bed makes Hiroyuki rich, he won’t need to work, and he won’t need to get up early!

小题1: The bed is useful to the people ________.

A. who can’t sleep well      

B. who can’t get up early     

C. who go to bed late

小题2: The bed is not connected to ________.

A. an alarm clock             B. a tape recorder            C. a TV

小题3:What will finally happen to Hiroyuki if he doesn’t get up?

A. He will slide onto the floor.

B. A tape recorder will play a recording of his boss.

C. A mechanical “foot” will kick him in the head.

小题4: Which is TRUE of the following sentences?

A. Hiroyuki’s company has made many such beds.

B. Hiroyuki’s bed is the only one made for a contest.

C. Hiroyuki has made a lot of money.

小题5:The word “whisper” in the second paragraph means “________”.

A. speak loudly         

B. speak angrily         

C. speak quietly

问答题