Simulation of Hydraulic Cylinder Cushioning

Author:

Algar AntonioORCID,Freire JavierORCID,Castilla RobertORCID,Codina EstebanORCID

Abstract

The internal cushioning systems of hydraulic linear actuators avoid mechanical shocks at the end of their stroke. The design where the piston with perimeter grooves regulates the flow by standing in front of the outlet port has been investigated. First, a bond graph dynamic model has been developed, including the flow throughout the internal cushion design, characterized in detail by computational fluid-dynamic simulation. Following this, the radial movement of the piston and the fluid-dynamic coefficients, experimentally validated, are integrated into the dynamic model. The registered radial movement is in coherence with the significant drag force estimated in the CFD simulation, generated by the flow through the grooves, where the laminar flow regime predominates. Ultimately, the model aims to predict the behavior of the cushioning during the movement of the arm of an excavator. The analytical model developed predicts the performance of the cushioning system, in coherence with empirical results. There is an optimal behavior, highly influenced by the mechanical stress conditions of the system, subject to a compromise between an increasing section of the grooves and an optimization of the radial gap.

Publisher

MDPI AG

Subject

Management, Monitoring, Policy and Law,Renewable Energy, Sustainability and the Environment,Geography, Planning and Development

Cited by 4 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

1. Research on Pressure Buffer Structure of Swash Plate Plunger Hydraulic Transformer;International Journal of Precision Engineering and Manufacturing;2024-08-07

2. Procedure to Determine the Hydraulic Resistance Force in a Shock Absorber;Springer Proceedings in Materials;2024

3. Modeling and development of a liquid piston hydrogen compressor with a double buffer structure: A new insight;International Journal of Hydrogen Energy;2023-04

4. Aspects Regarding the Dynamic Behavior of a Hydraulic Cylinder;Bulletin of the Polytechnic Institute of Iași. Machine constructions Section;2021-03-01

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