Abstract
The high load capacity and the harsh working environment of mining dump trucks require suspension structures with good damping properties and simple structures. Hydro-pneumatic suspensions are widely used due to their non-linear stiffness and damping characteristics, which allow them to adapt to changes in external load excitation. To solve the problem of the high stiffness of the vehicle under loading impact conditions, which leads to easy damage to the suspension and tire components, a two-stage pressure hydro-pneumatic suspension system is designed to meet the needs of the new vehicle based on the single-chamber hydro-pneumatic suspension. The 1/4 hydro-pneumatic suspension of a mining dump truck is applied as the research object. By comparing the pressure, dynamic deflection, and acceleration of the two types of suspension cylinders through simulation and experiment, respectively, the damping characteristics of the two-stage pressure hydro-pneumatic suspension system during the loading process are obtained.
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