帮忙翻译文献 出自 建筑类专业外语暖通与燃气第一册

来源:百度知道 编辑:UC知道 时间:2024/06/24 07:32:14
第八页 A very common perssure measuring device is the Bourdon-tube type of

pressure gage.Fundamentally,this gage consists of a coiled elliptical

tube that is fixed at one end and free to move at the other end.the

pressure to be measured is transmitted to the inside of the inside of

the tube there will be movement of the free end of the tube when the

pressure within the tube differsfrom that outside the tube.the movemet

of the tube is transimtted to the needle of the gage.becausethe

pressure on the outside of the tubr is atmospspheric,the reading on

the gage is the perssure above of below that of the atmosphere .in

general,then,gage pressure is defined as the oressure above that of

the atmosphspher
another type of pressure device is the manometer.the U-tube type of

manometer is illustrared in Fig.1-2.Here the fluid pressure to be

measured is

一种很常见的测压设备称为波登管式压力计。这种压力计的基本构造是一条圈状椭圆形管,其一端固定,另一端可自由移动。要测量的压力被传导到管的内侧。当管内外的压力出现差异时,自由端会移动。管的移动传导到压力计的指针。由于管外侧的压力就是大气压力,压力计的读数就是高于或低于大气压力的值。但一般情况下,压力计测量的压力定义为高于大气压力的压力。
另一种测压设备为压力计。图1-2所示为U形管式压力计。这里要测量的液体压力与液柱的重量相平衡。用于测压的液体通常为水、水银和一种特殊的压力计油。由于已知与压力取得平衡的液体的具体重量或每单位液柱的重量,以及液柱的高度,因此可确定压力大小。这样,具体重量(单位为磅/立方英寸)与液柱的高度(单位为英寸)的乘积就等于压力(单位为磅/平方英寸)。大体上,由于因液体产生的力...(句子不完整)