Design and research of two-point contact type stacked roller support two-dimensional piston pump

Abstract

To address the effect of clearance on the efficiency of two-dimensional piston pumps, this paper proposes a novel two-point contact type stacked roller support two-dimensional piston pump that eliminates the effect of guide rail and cone roller clearance on mechanical efficiency and volumetric efficiency in the inertia force-balance two-dimensions piston pump. It achieves two-way force balance support for the hydraulic static pressure and inertia force of the cone rollers through the overlapping mutual support and friction transmission of the double-layered cone rollers, which can effectively compensate for the gap between the rollers and the guide rail. The structure and operating principle of a two-dimensional piston pump are described first in this study, establish the mechanical efficiency model and volumetric efficiency model. Building an experimental bench for testing, the outcome is consistent with the theoretical analysis, and the difference is within 6%, demonstrating that the theoretical analysis is correct.