Publication: Effect of pressure, temperature and orifice sizing on the vibration and actuation speed of the transfer valve under different operating conditions Chin, Jun Hong
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Date
2023-07-07
Authors
Chin, Jun Hong
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Abstract
The transfer valve studied in this project is provided by VAT Manufacturing Malaysia Sdn Bhd. The condition that might affected the performance of transfer valve included the operating temperature, transfer valve's mounting orientation, setting pressure, gate size, and orifice size of the set screw mounted to the valve. Hence, this study investigates the effect of stated parameters on the vibration and actuation speed of the valve under all possible operating conditions. Experimental Modal Analysis (EMA) has been conducted to study the relationship between natural frequency and vibration of the valve gates. A custom made adapter and wireless accelerometer were used for the vibration measurements. The actuation speed of the transfer valve was recorded using a position indicator and customized NI software. The experiment covered all the possible combinations of operating conditions for the valve. This study successfully investigated the natural frequency of small-sized and large-sized gates in a valve system. The study also demonstrated that increasing the operating temperature will increase the vibration and actuation speed of the valve, while the influence of setting pressure on vibration was fluctuated. The opening operation of the valve took longer time than the closing operation due to the linear motion mechanism, and the actuation speed for closing operation increased with the temperature. The impact of setting pressure on actuation time was minimal, and an the increment of the orifice size led to the increased of vibration due to higher volume flow rates and impulsive forces. Future studies can involve Operation Deflection Shape (ODS) analysis to investigate the relationship between recorded vibration frequencies and operating conditions of the valve gates. Increasing the number of cycles, repeating experiments, and expanding the range of orifice sizes for the set screw would provide more comprehensive data for the analysis.