管道振动对涡街流量计测量影响的试验研究

邢娟 张涛 郝松

振动与冲击 ›› 2009, Vol. 28 ›› Issue (3) : 112-115.

PDF(1373 KB)
PDF(1373 KB)
振动与冲击 ›› 2009, Vol. 28 ›› Issue (3) : 112-115.
论文

管道振动对涡街流量计测量影响的试验研究

  • 邢娟 张涛 郝松
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EXPERIMENTAL RESEARCH ON MEASURING ACCURACY OF VORTEX FLOWMETER UNDER PIPE VIBRATIONS

  • XING Juan ZHANG Tao HAO Song
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摘要

为研究管道振动对涡街流量计测量的影响,以国内普遍使用的应力式涡街流量计为研究对象,在气体流量管道振动试验装置上,流量范围35m3/h~145 m3/h内,分别在不同管道振动加速度(0.05g、0.1g、0.2g、0.5g、1g)、频率(40Hz、100 Hz、200 Hz)、垂直和水平方向上进行了一系列管道振动试验。通过对不同管道振动情况下的涡街流量计仪表系数误差分析发现,涡街仪表系数误差随管道振动加速度的增加而变大,抗振性能较差;相同振动加速度下,仪表系数误差随流量增大有减小趋势,小流量下对管道振动尤为敏感;同一振动加速度下,仪表系数误差随管道振动频率增大而减小;水平方向管道振动较之垂直方向仪表系数误差更小,抗振性能更好。

Abstract

It is well known that the vortex flowmeter based on piezoelectric effect widely used in flow measuring applications is sensitive to the vibration of the pipeline where it locates, which brings detection errors. In order to study the pipeline vibration influence on the measuring accuracy of the vortex flowmeter, a number of experiments under the gas flow rate in the rang from 35m3/h to 145 m3/h have been carried out on the application-specific pipe vibrating facility, where the vibration parameters can be configured ( vibrating acceleration:0.05g, 0.1g, 0.2g, 0.5g, 1g; vibrating frequency: 40Hz, 100 Hz, 200 Hz; vibrating direction: vertical and horizontal ). The pipeline vibration influence and the anti-vibration performance of the vortex flowmeter are evaluated in terms of its meter coefficient. The results show that with an increase in vibrating acceleration, there is an increase in the meter coefficient error; with an increase either in vibrating frequency or flow rate at the same vibrating acceleration, there is a decrease in the meter coefficient error; and smaller influence on the measuring accuracy is caused by the horizontal-oriented pipeline vibration compared with the vertical-oriented one.

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邢娟 张涛 郝松. 管道振动对涡街流量计测量影响的试验研究[J]. 振动与冲击, 2009, 28(3): 112-115
XING Juan ZHANG Tao HAO Song. EXPERIMENTAL RESEARCH ON MEASURING ACCURACY OF VORTEX FLOWMETER UNDER PIPE VIBRATIONS[J]. Journal of Vibration and Shock, 2009, 28(3): 112-115

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