行业新闻

原文
Valve noise analysis Cavitation and noise control valve to control the fluid pressure differential in the two hazards. Noise on the control valve is in the petrochemical industry major source of pollution. In use in addition to the structure of selected low-noise control valve, the valve operating conditions change is to eliminate or reduce cavitation and noise of the fundamental ways. Control valve at work, it should be noted that the noise situation, analyzed and noise generation mechanism can better monitor the working status of valves and effective processing of the problem. (1) Mechanical vibration - such as when the spool is in the horizontal movement of the sleeve when the spool and the sleeve can make the gap as small as possible or use a hard surface of the sleeve. (2) the natural frequency of vibration - such as valve or other components, they have a natural vibration frequency, which can be cast or forged by a special process to change the valve characteristics and, if necessary, can also replace other type of valve. (3) spool instability - such as due to oscillation of the spool displacement fluid pressure fluctuations caused by noise generated, this is generally due to the actuator control loop such as the damping factors, which can re-adjust the damping factor or displacement direction with damping spool facility. (4) the mechanical mobility of the media - media in the pipeline or flow control valve, also the noise, in this case, where no specific elaboration (cavitation will generate noise).
原文来自http://www.tiaojiefa.org

是由上海一环流体控制设备有限公司提供的阀门新闻，中文译文仅供参考，以下提供站内导航搜索：

中国调节阀网调节阀产品调节阀知识调节阀厂商调节阀博客调节阀行业新闻

译文：

译文：
气蚀和噪音是调节阀在控制高压差流体中的两大公害。调节阀上的噪音更是石油化工生产中的主要污染源。在使用中除需选用低噪音结构的调节阀外，改变阀的操作条件更是消除或降低气蚀和噪音的根本方法。调节阀在工作时，应注意它的噪音情况，分析好噪音的产生机理可以更好地监视调节阀的工作状态和有效处理所发生的问题。（1）机械类振动——如当阀芯在套筒内水平运动时，可以使阀芯与套筒的间隙尽量小或者使用硬质表面的套筒。（2）固有频率振动——如阀芯或者其它的组件，它们都有一个固有振动频率，对此，可以通过专门的铸造或锻造处理来改变阀芯的特性，如有必要也可以更换其他类型的阀芯。（3）阀芯不稳定性——如由于阀芯振荡性位移引起流体的压力波动而产生的噪音，这种情况一般是由于调节回路执行器等的阻尼因素引起的，对此可以重新调节阻尼系数或者在阀芯位移方向上加上减振设施。（4）介质的力学流动性——介质在管道或者调节阀中流动时，也会发出噪音，对于这种情况，这里不作具体阐述（气蚀也会产生噪音）。

更多新闻：