Design and Optimization of a Constant Pressure Hydraulic Accumulator Using a Cam Mechanism

Hydraulic accumulators are used widely in the industry field since been developed. Traditional hydraulic accumulators have two major deficiencies, one is that the fluid pressure decreases when supplying additional fluid power into the hydraulic system, and the other one is that the energy density is lower than fuels and lithium batteries. In this paper, we design a constant pressure hydraulic accumulator (CPHA) using a cam mechanism which can maintain pressure in a constant value and achieve a higher energy density. The structure design and mathematical models of the CPHA are presented. The eight design parameters of the CPHA are optimized using a genetic algorithm. Based on the optimized results, the energy density of the CPHA is analyzed and compared to a conventional accumulator.