问题 问答题 简答题

XHD720—190×2型脱碳泵如何测量调整止推轴承间隙?

答案

参考答案:止推轴承的间隙通常用推轴法测量。先将转子推到一侧极限位置,在转子轴头上或其他部位架上百分表,记录表针指示值。然后将转子推到另一侧极限位置,并记录百分表指示值,两次百分表读数之差,即为止推轴承间隙。注意要来回多推动几次转子,转子轴向移动要到位,并且几次测量的止推轴承间隙数据要一致。

对于新安装的止推轴承间隙调整,可用增厚或减薄止推轴承非工作侧调整垫片的方法来实现,这样既调整了止推轴承间隙,又不改变转子的轴向工作位置。注意测量止推轴承的间隙时,要扣上轴承箱上盖(端盖)并把紧剖分面的螺栓,否则测量误差较大。另外止推轴承工作和非工作面调整垫片只允许用一次,并且沿整周厚度要均匀。

单项选择题
完形填空
The requirements for high school graduation have just changed in my community. As a result, all students must   36   sixty hours of service learning,   37   they will not receive a diploma. Service learning is academic learning that also helps the community.    38    of service learning include cleaning up a polluted river, working in a soup kitchen, or tutoring a student.    39   a service experience, students must keep a journal(日志)and then write a   40   about what they have learned.
Supporters claim that there are many   41    of service learning. Perhaps most importantly, students are forced to think   42   their own interests and become   43   of the needs of others. Students are also able to learn real-life skills that   44    responsibility, problem-solving, and working as part of a team.   45  , students can explore possible careers   46   service learning.
For example, if a student wonders what teaching is like, he or she can choose to work in an elementary school classroom a few afternoons each month.  47   there are many benefits, opponents (反对者)   48   problems with the new requirement. First, they   49   that the main reason students go to school is to learn core subjects and skills. Because service learning is time-consuming, students spend   50   time studying the core subjects. Second, they believe that forcing students to work without   51   goes against the law. By requiring service, the school takes away an individual's freedom to choose.
In my view, service learning is a great way to   52   to the community, learn new skills, and explore different careers.   53   , I don' t believe you should force people to help others – the  54   to help must come from the heart. I think the best   55    is one that gives students choices: a student should be able to choose sixty hours of independent study or sixty hours of service. Choice encourages both freedom and responsibility, and as young adults, we must learn to handle both wisely.
小题1:
A.spendB.gainC.completeD.save
小题2:
A.andB.orC.butD.for
小题3:
A.SubjectsB.ideasC.ProceduresD.Examples
小题4:
A.WithB.BeforeC.DuringD.After
小题5:A. diary             B, report              C . note              D. notice
小题6:
A.coursesB.benefitsC.challengesD.features
小题7:
A.beyondB.aboutC.overD.in
小题8:
A.carefulB.proudC.tiredD.aware
小题9:
A.possessB.applyC.includeD.develop
小题10:
A.GraduallyB.FinallyC.LuckilyD.Hopefully
小题11:
A.throughB.acrossC.ofD.on
小题12:
A.SoB.ThusC.SinceD.While
小题13:
A.deal withB.look intoC.point outD.take down
小题14:
A.argueB.doubtC.overlookD.admit
小题15:
A.muchB.fullC.lessD.more
小题16:
A.costB.payC.care.D.praise
小题17:
A.contributeB.appealC.attendD.belong
小题18:
A.ThereforeB.OtherwiseC.BesidesD.However
小题19:
A.courageB.desireC.emotionD.spirit
小题20:
A.decisionB.purposeC.solutionD.result