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Related knowledge of vortex flowmeter
2011-10-25 16:23:18

理论,利用了流体的自然振动原理,以压电晶体或 差动电容作为检测部件 制成的一种速度式流量仪表 这就产生了涡街流量计 According to Carmen's vortex street theory, the natural vibration principle of the fluid is used, and a piezoelectric crystal or a differential capacitor is used as a detection component to produce a velocity flow meter. This produces a vortex flowmeter .
     仪表采用 的是 先进的差动技术,配合隔离、屏蔽、滤波等措施,克服了同类产品抗震性差、小信号数据紊乱等 缺点 同时 采用了独特的传感器封装技术和防护措施,保证了 仪表 的可靠性。 The vortex flowmeter instrument uses advanced differential technology, and cooperates with isolation, shielding, filtering and other measures to overcome the shortcomings of similar products such as poor seismic resistance and small signal data disorder . At the same time , it adopts unique sensor packaging technology and protective measures to ensure The reliability of the instrument . 有基本型和复合型两种型式 基本型测量单一流量信号;复合型可同时实现温度、压力、流量的测量。 It generally has two types : basic type and composite type : the basic type measures a single flow signal; the composite type can simultaneously measure temperature, pressure and flow. 分体结构,以 便 适应不同的安装环境。 Each type has integral and split structures to suit different installation environments.
     仪表具有 以下一系列优点: 量程比宽 精度高 安装维护方便和介质适应性广等。 Vortex flowmeter instruments have the following series of advantages: Wide range ratio ; High accuracy ; Easy installation and maintenance and wide media adaptability. 广泛应用于石油、化工、冶金、机械、食品、造纸 行业 同时也适用于 城市管道供热、供水、煤气等行业 ,因为它可以对这些行业 的各种低黏度液体、气体、蒸汽等单相流体的工艺计量和节能管理。 Can be widely used in petroleum, chemical, metallurgy, machinery, food, papermaking industries , but also for urban pipeline heating, water supply, gas and other industries , because it can be used for various low viscosity liquids, gases, steam, etc. in these industries Process metering and energy-saving management of single-phase fluids.

是由流场中的旋涡发生体、检测探头 及相应的电子线路等组成 The vortex flowmeter is composed of a vortex generator, a detection probe and corresponding electronic circuits in the flow field . ,它的两侧就形成了交替变化的两排旋涡,这种旋涡被称为卡门涡街。 When the fluid flows through the vortex generator , two rows of vortices are formed on both sides of the vortex generator . This vortex is called Carmen vortex street. 又提出了卡门涡街的频率与流体的流速成正比, 同时 给出了频率与流速的关系式: Based on Carmen's vortex street theory, Strouhal also proposed that the frequency of Carmen's vortex street is proportional to the flow velocity of the fluid, and the relationship between frequency and flow velocity is also given:
f = St × V / d
                      式中:f 涡街发生频率 (Hz) In the formula : f is the frequency of vortex occurrence (Hz)
旋涡发生体两侧的平均流速(m/s ) V is the average flow velocity (m / s) on both sides of the vortex generator
                      St 斯特罗哈尔系数(常数) St Strouhal's coefficient (constant)