| 查看: 489 | 回复: 1 | |||
| 本帖产生 1 个 翻译EPI ，点击这里进行查看 | |||
言论压力
|
[求助]
求助英译中
|
||
|
When pressure drops ratio (x=ΔP/P1) reaches some values close to 0.5 there will be sonic conditions with the associated vibration and noise, in gas or steam applications. In liquid service, when downstream pressure approaches vapour pressure at fluid temperature, cavitation will appear, with noise increase and damage to the valve components. This will happen whenever the cavitation index xF=(P1-P2)/ ΔP reaches the valve FL2 value. Our approach to both problems, either gases (sonic conditions) or liquids (cavitation), is based on the “source treatment”principle: this is to suppress the source of the problem, which is the high pressure drop. With our multicylinder cage the fluid goes through a stepped pressure reduction process, the number of steps being as large as necessary to keep pressure drop under critical values. We have the technology to calculate, design and manufacture the valve internals best suited for every set of conditions. We calculate, for every particular application, -the number of steps necessary to avoid critical conditions at any stage, -the partial pressure drops at every stage, -the Cv value of every cylinder to achieve a non critical pressure profile. This is equivalent to say that xT and Fl values of every valve will be as high as required by the given conditions. In small Cv, small size valves, the same results are obtained by our Multistep design. 阀门介绍，要求翻译准确点。 |
回复此楼» 猜你喜欢
291分调剂
已经有9人回复
-
调剂求收留
已经有34人回复
-
291 求调剂
已经有38人回复
-
22408 312求调剂
已经有17人回复
-
一志愿华中农业071010，320求调剂
已经有6人回复
-
290调剂生物0860
已经有41人回复
-
291求调剂
已经有3人回复
-
211本科材料化工求调剂
已经有23人回复
-
山东省基金2026
已经有9人回复
-
药学求调剂
已经有13人回复
【答案】应助回帖
★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ...
言论压力: 金币+100, 翻译EPI+1, ★★★★★最佳答案, 非常感谢 2013-10-25 14:58:09
言论压力: 金币+100, 翻译EPI+1, ★★★★★最佳答案, 非常感谢 2013-10-25 14:58:09
|
当压力下降率（ x = ΔP/P1）达到接近0.5的某个值时 ，气体或蒸汽应用中会有与振动和噪音相关的声波条件。在液体中，当下游压力接近流体温度的蒸气压时，会出现气穴现象，并伴有噪声的增加和阀门组件的损坏。当xF的气蚀指数= （P1-P2 ） / ΔP达到阀FL2的值时将发生这种情况。 无论是气体（音速条件）或液体（气蚀） ，我们解决两个问题的方法是基于“源治疗”的原则：即抑制问题的源头——压力降。 多筒穴中流体经过台阶减压过程，台阶数需要足够大以保持临界值下的压力降。 我们有方法来计算，设计和制造阀门内部以适合每一个条件。我们为每一个特定的应用计算 台阶的必需数量以避免危急的情况 在任何阶段的分压下降 每个筒的Cv值以·实现非关键压力分布。 这等于说XT的值和Fl值的每一个阀都与给定条件所要求的一样高。在小CV，小口径阀门的条件下，我们的多步设计得到了相同的结果。 |
2楼2013-10-17 17:03:44
