INVESTIGATION OF TILT-ANGLED DELIVERY VALVE IN HYDRAULIC RAM - EXPERIMENT RESULTS

Abstract

This paper presents the experiment results of the cycle work and overall performance of a new design of delivery valve in hydraulic ram. A hydraulic ram comprises of two non-return valves. They are well known as waste and delivery valves. Both mechanism propagate water hammer in cycle work of the hydraulic ram. In early designs, the water flow phenomenon occurring in the hydraulic ram operating process must be fully recognized for further analysis. Therefore, a transparent acrylic material of a hydraulic ram model was utilized to simulate the flow pattern within the hydraulic ram. In this study, the water flow phenomenon was visualized experimentally using dyes injection method. Then, videos and pictures recorded using slow motion video camera for investigating the hydraulic ram working cycle. The transparent hydraulic ram model was the first time introduced. The results show that the delivery valve with tilt-angled of 60 was the best design to produce the optimal performance of the pump system. The most stagnation point of the flow directed through the delivery valve orifice. The total efficiency of the hydraulic ram theoretically improved up to 24% by using the new model instead of the old one.