问题 问答题 简答题

试述筒式导轴承的安装调整工序。

答案

参考答案:

(1)机组轴线及中心调整已经合格,机组转动部分处于自由垂直状态。

(2)按90°方向在水导轴颈处装设两块百分表,且指针调零。

(3)轴承吊入:

1)在轴承的组合面上涂以漆片酒精溶液,然后组合起来;

2)将下油箱盖板组合在轴承上,组合面也应涂漆片酒精溶液;

3)将轴承体徐徐下落,当下油槽盖板与下油槽面相结合后,将下油槽盖板与下油槽组装打入销钉,拧紧螺栓并锁住;

4)落下轴承体。

(4)轴承调整:

1)根据机组的轴线位置,考虑水导处的摆度值,确定轴承各向的间隙,各向的间隙可先用塞尺测量,并用平移轴承体的方法调整;

2)轴瓦面必须保持垂直,不垂直时可在轴承体安装面上加金属垫调整,但垫片最多不能超过三层;

3)调整合格后,将轴承体的固定螺钉拧紧。

(5)间隙测量:

1)方法:以千斤顶顶轴、百分表测量的方法测量轴承的间隙。

2)要求:两侧轴承间隙之和应符合图纸规定,轴瓦间隙允许的偏差,应在分配间隙值的±20%以内。

(6)检查轴承间隙等符合要求后,将轴承体定位,如果原销钉孔有错位,则应扩孔或重新钻铣销钉孔,配制销钉。

(7)将上油槽、温度计、油位计、管路等附件复装,封闭油槽盖板,充油至规定的高度。

单项选择题
完形填空
完形填空。
     I live in a big city with a lot of homeless people. Luckily there're some ways of helping
them and you needn't have a lot of ___1__. One way to help is to buy their monthly magazine.
___2___doing this one day, I got to __3__a young homeless man. He was often__4__the
magazine at the train station.
     He was a poor farmer from another country. After a while, I discovered that his__5__
was close to mine. It__6__that we were born in the same month.
     I met him last year__7__after his birthday, and after congratulating him without__8__,
I asked if he had had a good day. He__9__ and said that he hadn't really celebrated. I felt
so__10__.
     I just couldn't bear the thought of (不敢想)this nice, young man being__11__on his 25th
birthday with no presents, no cake, nothing! So I went home and looked in my yarn(纱线)
basket.__12__for me, I had enough yarn __13__ . I set to work and knitted(编织) a__14__
for the young man. The yarn had become a little dirty__15__ I didn't knit very often. Then
I washed the yarn so the scarf would be__16__when he got it.
     I met him on my own birthday as I was going shopping. I had__17__ to meet him so I
had__18__the scarf and a piece of my own birthday__19__ around with me. He was very
happy with these gifts and so was I. The__20__ in his eyes was the best present he could
have given me!
( )1.A. work
( )2.A. On
( )3.A. know
( )4.A. selling
( )5.A. house
( )6.A. said
( )7.A. long
( )8.A. stopping
( )9.A. looked up
( )10A. foolish
( )11.A. calm
( )12.A. Suddenly
( )13.A. used
( )14.A. scarf
( )15.A. when
( )16.A. different
( )17.A. liked
( )18. A. made
( )19.A. cake
( )20.A. light

B. energy
B. In
B. realize
B. reading
B. birthday
B. found
B. shortly
B. helping
B. turned up
B. excited
B. happy
B. Luckily
B. done
B. cap
B. because
B. dry
B. hoped
B. thrown
B. present
B. pain

C. experience
C. By
C. ignore
C. covering
C. height
C. guessed
C. ever
C. praising
C. looked down
C. clever
C. alone
C. Badly
C. left
C. sock
C. so
C. wet
C. promised
C. received
C. song
C. sight

D. money
D. Besides
D. recognize
D. buying
D. hobby
D. meant
D. even
D. thinking
D. got down
D. worried
D. hungry
D. However
D. produced
D. glove
D. and
D. clean
D. agreed
D. carried
D. party
D. tear