振动测点位置对离心泵空化敏感性研究

张宇航1,董亮1,宋礼威2

振动与冲击 ›› 2022, Vol. 41 ›› Issue (19) : 90-97.

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振动与冲击 ›› 2022, Vol. 41 ›› Issue (19) : 90-97.
论文

振动测点位置对离心泵空化敏感性研究

  • 张宇航1,董亮1,宋礼威2
作者信息 +

Sensitivity of vibration measuring point location to cavitation of centrifugal pump

  • ZHANG Yuhang1, DONG Liang1, SONG Liwei2
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摘要

振动信号常用于对离心泵内空化现象的检测中。为了更加准确地捕捉离心泵内空化发展状态,并探究空化对离心泵不同位置振动信号的影响,以一台单级离心泵为例,对不同空化阶段的离心泵振动信号进行了研究。通过计算空化初生及离心泵扬程下降3%时各测点振动加速度级变化率,对各测点振动信号对空化的敏感性进行了分析;通过1/3倍频程将振动信号划分为多个频段,分析了不同频段振动信号对空化的敏感性。结果表明:隔舌测点与进口法兰Y测点对离心泵内初生空化及严重空化均表现出了较高的敏感性,可应用于对离心泵内空化现象的研究中;轴承座Z测点与进口法兰Z测点对泵内空化现象的敏感性较低,不适合应用于对空化现象进行研究。
关键词:离心泵;空化;振动分析

Abstract

Vibration signals are often used to detect cavitation in centrifugal pumps. In order to more accurately capture the development state of cavitation and explore the influence of cavitation on the vibration signals of the centrifugal pump at different positions, a single-stage centrifugal pump was used to study the vibration signals at different cavitation stages. The sensitivity of the vibration signal of each measuring point to cavitation is analyzed by calculating the total vibration level change rate of each measuring point at the incipient cavitation and when the head of the centrifugal pump drops by 3%. The vibration signal is divided into multiple frequency bands through the 1/3 octave spectrum, and the sensitivity of vibration signals in different frequency bands to cavitation is analyzed. The results show that the vibration signals of the casing tongue and the inlet flange Y shows a high sensitivity to the inception cavitation and severe cavitation in the centrifugal pump. These two measuring points are suitable for the study of cavitation in the centrifugal pump. The bearing seat Z measuring point and the inlet flange Z measuring point have the lowest sensitivity to cavitation and is not suitable for the study of cavitation.
Key words: centrifugal pump; cavitation; vibration analysis

关键词

离心泵 / 空化 / 振动分析

Key words

centrifugal pump / cavitation / vibration analysis

引用本文

导出引用
张宇航1,董亮1,宋礼威2. 振动测点位置对离心泵空化敏感性研究[J]. 振动与冲击, 2022, 41(19): 90-97
ZHANG Yuhang1, DONG Liang1, SONG Liwei2. Sensitivity of vibration measuring point location to cavitation of centrifugal pump[J]. Journal of Vibration and Shock, 2022, 41(19): 90-97

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