Optimization of a spool valve to reduce pressure ripple in a collaborative rectification pump

This paper presents structure optimization of a spool valve to reduce pressure ripple in a novel linear collaborative rectification pump (CRP). The CRP is with two units, which consists of a cylinder to compress fluid and a spool valve for rectification. The novel pump has the problem of kinematic flow pulsation and pressure ripple the same as conventional piston pump. For the objective of pressure ripple reduction, a differentiable function is constructed based on one fourth model of CRP. Simulation results show that amplitude of the pressure ripple is reduced effectively by adding notches on the spool. The pressure ripple reduction effect of notches in different shapes have been simulated and compared.