Research on the Vibration Characteristics of High Pressure Drop sleeve Trap

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Journal of Vibration and Shock ›› 2018, Vol. 37 ›› Issue (4) : 147-152.

LI Shu-xun1,2, WANG Tian-long1,2,XU Xiao-gang1,2, MENG Ling-qi1,2, LOU Yan-peng1,2

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Abstract

Aiming at the problem of strong fluid vibration induced by improper design and selection of throttling element, high pressure drop multistage sleeve trap was taken as research object. Based on the theory of direct boundary element method, flow-induced vibration of traps of different pressure-drop stages and throttle hole diameter was simulated by numerical method. Thus, the vibration spectrum curves and total vibration level curves of Monitoring point at different openings were obtained. The results showed that flow-induced vibration spectrum characteristic is mainly affected by interval throttling elements but less affected by opening degree; Under constant rated flow and pressure, total vibration level reduces with the increase of pressure-drop stages, while the characteristics of vibration spectrum remains unchanged; With the decrease of throttle hole diameter, the total vibration level significantly reduces, and main ingredients of vibration concentrate in 50~500 Hz, which provide references for design and selection of throttling element. Considering the processing characteristics of the throttle sleeve, the throttle hole diameter should be 4~5 mm. In practical use, steam traps should better work under the middle opening degree in order to reduce vibration.

Key words

High pressure-drop / multi-level sleeve / throttle hole diameter / total vibration level / spectrum characteristic

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LI Shu-xun1,2, WANG Tian-long1,2,XU Xiao-gang1,2, MENG Ling-qi1,2, LOU Yan-peng1,2. Research on the Vibration Characteristics of High Pressure Drop sleeve Trap[J]. Journal of Vibration and Shock, 2018, 37(4): 147-152

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