问题 问答题 简答题

简述用压铅丝法测量圆筒形和椭圆形轴瓦顶部间隙的方法?

答案

参考答案:

将两根长50-80mm,直径比顶部间隙约大0.5mm左右的铅丝,横放在轴颈上方的前后部位,注意避开上轴瓦中间的油槽,然后组合上轴瓦,紧好结合面螺栓,使结合面压靠后,再分解取出铅丝,用千分尺测出等于轴瓦顶部间隙的铅丝厚度。若在轴瓦结合面上,也放上铅丝,则轴颈上所放铅丝的直径,应再增加结合面上的铅丝直径数,最后用千分尺测两处铅丝,取厚度差值即为轴瓦顶部间隙值。应注意轴瓦结合面螺栓不要紧偏。

改错题

短文改错。

     下面短文中有10处语言错误。请在有错误的地方增加、删除或修改某个单词。

     增加:在缺词处加一个漏字符号(∧),并在其下面写上该加的词。

     删除:把多余的词用斜线(\)划掉。

     修改:在错的词下划一横线,并在该词下面写上修改后的词。

     注意:1. 每处错误及其修改均仅限一词。

                 2. 只允许修改10处,多者(从第11除起)不计分。

     Thomas Edison, a famous American scientist and inventor, had more than 1000 inventions. As we

know, one of his inventions is bulb and they changed the world very greatly that the lights in America

were off for three minutes in the memory of him at his death.

     I admire him because his great contribution to the world. Though not blessed with much gift and even

thinking to be foolish in teachers' eyes, but he never discouraged himself by difficulties in life, which

instead motivated him to pursue his dream. Beside, in his spare time, he was always eager to know what

things worked, which made him full of wisdom and paved the way for his final success.

     Just as he says, genius is one percent inspiration and ninety-nine percent perspiration. From him, I

realize the secret to success is not when and where you were born, but what you are doing and how

you do it in your lives.

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