Simulation of the testing process of reciprocating hydraulic cylinders with energy recovery

Abstract

One of the most important problems of modern mechanical engineering is the energy efficiency of technological equipment and manufactured products. A separate issue in this series is the technology and means of testing finished product samples, including hydraulic cylinders, which can be carried out with passive or active energy recovery. The purpose of the work is to develop a test bench for piston hydraulic cylinders that provides recovery of part of the energy during the test, and at the same time the tests would take place in a mode as close as possible to the real conditions of their operation during their tests, as well as solving the problem of its modeling and calculation of the main functional parameters. In this article, a design scheme of a test bench for reciprocating hydraulic cylinders with active energy recovery and a method for mathematical modeling of the process of its functioning based on the application of the "theory of volumetric rigidity of hydraulic systems" is proposed, which makes it possible to describe with a high degree of accuracy and reliability the processes occurring in the test system during its operation. A scheme of a test bench for piston hydraulic cylinders with energy recovery is proposed. A mathematical model of the stand has been developed and an example of a preliminary calculation of its functioning is given. The proposed modeling method simplifies the modeling process and allows the use of numerical integration methods in calculations. The resulting mathematical model makes it possible to obtain rational parameters of the stand already at the design stage, without resorting to the need for expensive and labor-intensive field studies.

Improving the Efficiency of the Drive of the Test Bench of Rotary Hydraulic Machines

“…As part of the solution of the issue, a theoretical analysis of the regenerative stand was carried out, and a drive of the test bench for a rotary hydraulic machines was proposed [12].…”

“…Therefore, the research, design and calculation of regenerative drive systems for test benches of volumetric hydraulic machines are still relevant and important [12,13].…”