Vibration characteristics analysis for a tri-eccentric butterfly valve

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Journal of Vibration and Shock ›› 2018, Vol. 37 ›› Issue (5) : 202-206.

WANG Haimin, KONG Xiangshuai, LIU Huan

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Abstract

Tri-eccentric butterfly valves are widely used in various industries, such as, water distribution, sewage, oil and gas plants. Butterfly disc and valve rod vibrations in tri-eccentric butterfly valveis play an important role in their structure design and application. Besides, there are few publications to study vibration characteristics of tri-eccentric butterfly disc and valve rod. If butterfly disc’s natural frequency is closed to Karman vortex’s shedding frequency, a resonance phenomenon occurs to destroy a tri-eccentric butterfly valve, and affect the whole machine’s normal operation. Here, to prevent a resonance phenomenon happening, a butterfly disc and a valve rod’s natural frequencies were calculated under high temperature and high pressure. For this purpose, the finite element software ANSYS and test verification were used. With an emprical formula, Karman vortex shedding frequency was calculated. The sufficient condition for no resonance was obtained. Moreover, the effects of butterfly disc and valve rod vibration on the tightness of a tri-eccentric butterfly valve were presented..

Key words

tri-eccentric butterfly valve / butterfly disc and valve rod / natural frequency / Karman vortex

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WANG Haimin, KONG Xiangshuai, LIU Huan. Vibration characteristics analysis for a tri-eccentric butterfly valve[J]. Journal of Vibration and Shock, 2018, 37(5): 202-206

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