FLOW VISUALIZATION AND NOISE MEASUREMENT IN HYDRAULIC RELIEF VALVE

摘要

Cavitation is a basic resource of noise in hydraulic relief valve. In order to reduce cavitation noise, cavitation flow visualization in two types of valves were experimentally conducted and compared. Furthermore, cavitation noises were measured and noise spectrums were analyzed. A new type of relief valve has been improved and its cavitation region and cavitation noise are reduced.