| 摘要 |
<p>PROBLEM TO BE SOLVED: To realize a pulsation prevention device capable of attaining a superior pulsation prevention effect in all ranges of flow velocity variation even in the case where the flow velocity variation is high while a pressure loss of fluid flowing in the pipe is being restricted.SOLUTION: A pulsation prevention device 24 is arranged at a discharging side pipe 22 of an electric oil pump in an oil-cooled circuit. The pulsation prevention device 24 is constituted by several pipes 26a to 26e having different diameters and each of their axial lengths is different from each other. An axial length of each of the pipes 26a to 26e is set to be longer than a half wave length of a pulsation (p) calculated by the product of a flow velocity of fluid flowing inside each of the pipes and a period of the pulsation (p) occurred inside each of the pipes, the pulsation of fluid having a shorter half wave length flowed inside each of the pipes is reflected within the pipes. With this action, the pulsation energy can be effectively decreased.</p> |
