问题 问答题 简答题

填料的装配及检修应注意什么?

答案

参考答案:填料装配、研磨和调整不当时,很容易发生漏气现象。因此在装配时要做到:

(1)正确地装配和研磨填料函密封原件,使其与活塞杆表面接触紧密,并且各元件之间也要达到正确的配合。在安装金属填料函之前,应将其拆卸、清洗,并进行检查。按照制造记号组装,全部组合件(包括润滑油孔道)均须洗净,并按图检查各密封元件的加工质量。

(2)在活塞杆或与活塞杆尺寸相同的芯棒上涂抹红丹粉,将密封环和内夹环套在活塞杆或芯棒上,往复移动几次,然后取下检查接触情况,必要时应适当修刮研磨,使贴合面积不少于70%,并能达到不间断地沿圆周均匀接触。

(3)支承环端面与填料函壳内端面及各填料函室之间亦应进行检查,接触的印迹应沿圆周连续分布,而无径向间断印迹,必要时应加以研磨。

(4)各密封元件经过清洗之后,应检查各部件的间隙,必要时应修复调整。

(5)在安装填料函时必须检查该部件的中心是否与活塞杆的中心线重合一致。如果误差较大,活塞杆不在填料函的中心位置运行,会导致过热、磨损、漏气等一系列现象。

判断题
单项选择题

A narrowing of your work interests is implied in almost any transition from a study environment to managerial or professional work. In the humanities and social sciences you will at best reuse only a fraction of the material (1) in three or four years’ study. In most career paths academic knowledge only (2) a background to much more applied decision-making. Even with a " training " form of degree, (3) a few of the procedures or methods (4) in your studies are likely to be continuously relevant in your work. Partly this (5) the greater specialization of most work tasks compared (6) studying. Many graduates are not (7) with the variety involved in (8) from degree study in at least four or five subjects a year to very standardized job (9) . Academic work values (10) inventiveness, originality, and the cultivation of self-realization and self-development. Emphasis is placed (11) generating new ideas and knowledge, assembling (12) information to make a " rational " decision, appreciating basic (13) and theories, and getting involved in fundamental controversies and debates. The humanistic values of higher (14) encourages the feeling of being (15) in a process with a self-developmental rhythm. (16) , even if your employers pursue enlightened personnel development (17) and invest heavily in " human capital " —for example, by rotating graduate trainees to (18) their work experiences—you are still likely to notice and feel (19) about some major restrictions of your (20) and activities compared with a study environment.

(17)()

A.laws

B.rules

C.policies

D.studies