Analysis of noise elimination and vibration damping in high temperature and pressure superheat steam trap

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Journal of Vibration and Shock ›› 2011, Vol. 30 ›› Issue (10) : 116-121.

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Analysis of noise elimination and vibration damping in high temperature and pressure superheat steam trap

LI Shu-xun1,2; ZHAO Zi-qin 1; ZHANG Yun-long3

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Abstract

Strong vibration and high noise were generated in high temperature and pressure superheat steam trap of domestic company. Numerical simulation with finite element method was used to analyze the unstationary characteristic of inner 2D field for the steam trap. Based on the two methods of time-average flow analysis and large eddy simulation(LES),it was found the main factors of vibration and noise in steam trap. According to the characteristic of the frequency spectrum of the noise signal, mechanism with the high acoustic level and principle of throttle step-down ,throttle injection muffler of low vibration and noise steam trap was designed, and the spec-trum analysis was implemented. The results of numerical analysis match with the theoretical analysis ,which pro-vides the reliable basis for the noise elimination vibration damping and capability choiceness.

Key words

superheat steam trap / numerical simulation / flow characteristics / throttle step-down / noise elimination and vibration damping

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LI Shu-xun;ZHAO Zi-qin;ZHANG Yun-long. Analysis of noise elimination and vibration damping in high temperature and pressure superheat steam trap [J]. Journal of Vibration and Shock, 2011, 30(10): 116-121