Research on Pressure Buffer Structure of Swash Plate Plunger Hydraulic Transformer

Abstract

The phenomenon of pressure shock is experienced in the operation of hydraulic transformers. A valve plate featuring a triangular groove buffer structure is designed in this paper to mitigate this phenomenon. The differential equation of oil pressure in the plunger cavity with buffer structure is established and transformed into the pressure increment equation of the plunger cavity, thereby obtaining the relation curves between the size of the buffer structure and the pressure change of the plunger cavity, as well as the influence law of the buffer structure on the pressure change of the plunger cavity. The optimal size of the triangular groove buffer structure for each distribution window is determined. The fluid model with the above buffer structure is subjected to a transient simulation using ANSYS, and the pressure distribution cloud diagram of the plunger is obtained. The simulation results show that the cushioning structure can effectively realize the pressure buffering effect.