灰渣泵叶轮与前护板之间的间隙对灰渣泵的扬程有何影响？如何调整_爱下问搜题

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问题问答题简答题

灰渣泵叶轮与前护板之间的间隙对灰渣泵的扬程有何影响？如何调整？

答案

参考答案：

灰渣泵叶轮与前护板的间隙对灰渣泵的扬程有很大的影响，间隙过大，泄漏增加，会导致出口扬程降低。间隙过小，易引起动静部件间的摩擦。该间隙的调整应在安装和更换叶轮时进行。调整方法，一般以调整轴承箱外大轴承上的圆螺母作叶轮定位作粗调整，以轴封处两个圆螺母作细调整。

解答题

406000这个数读作______，是由4个______，6个______组成的．

完形填空

Four brothers left home for college, and they became successful doctors and lawyers. Some years later, they 16  after having dinner together. They discussed the 17  they gave their elderly mother who lived far away in another city. The first said, “I had a  18  house built for Mama.” The second said, “I had my Mercedes-Benz dealer（经销商）send a  19  to her.” The third said, “I built a beautiful   20  for Mama.” The fourth said, “You know   21  Mama loved reading poems and you know she can’t read anymore because she can’t   22  very well. I met a   23  who had a parrot（鹦鹉）that can recite many poems. It took him 12 years to   24  it to speak and he earns his living by renting it out. I had to pay him $100,000 a year for twenty years, 25  it is worth it.” On hearing that, the other brothers were   26  by his good thought.
After the holidays their mother   27  her thank-you notes, which read:
“Milton, the house you built is so huge. I only live in one room, but I have to 28 the whole house. It’s a tiring job. Thanks anyway.”
“Marvin, I am too old to   29 . I stay home and have my foods delivered, so I’ll 30 use the car. The   31  was good, although not practical. Thanks.”
“Michael, you gave me an expensive building for 50 people to  32  plays or watch movies in it, but all my friends are dead. I’ve almost   33  my hearing and I’m nearly blind. I won’t use it. Thank you all the same.”
“Dearest Melvin, you were the   34  son to have the good sense to give a little thought to your gift. The chicken tasted so   35 . I liked it very much. Thank you.”

C．businessman