Abstract
The interconnected hydropneumatic suspension (ICHPS) has not only the nonlinear stiffness and damping of the independent hydropneumatic suspension (IDHPS) but also antiroll and antipitch functions. The existing analysis of hydropneumatic suspension damping mainly focuses on the orifice and check valve in the suspension cylinder. In this study, the calculation formula of the damping force of ICHPS is established, and the numerical simulation results show that the damping characteristics of the hydraulic hose cannot be ignored. The influence of check valve and hose on the damping characteristics is analyzed. Through the equivalent energy method, the equivalent compression damping ratio and the equivalent recovery damping ratio of the ICHPS are established. It is pointed out that when designing the damping characteristics of the ICHPS, it is necessary to select the orifices, check valves, and hose damping reasonably to make the damping characteristics get the best match.
Highlights
E main research object of this study is the damping characteristics of the interconnected hydropneumatic suspension (ICHPS)
E oil in chamber III enters chamber II through check valve 4 and orifice 5, but the oil in chamber II can only enter chamber III through orifice 5. e structure of this scheme is completely symmetrical on the left and right, which is consistent with the symmetry of the mass distribution of the vehicle
NCd 2pj/ρ where vymax is the maximum compression speed, the maximum recovery speed of 0.3 m/s when an all-terrain crane passes through a high bump on a class D road at 70 km/h; D is the piston diameter; d is the rod diameter; Cd is the flow coefficient of the check valve; pj is the static equilibrium pressure; ρ is the hydraulic oil density; n is the number of check valves, generally 2. e diameter of the check valve seat hole can be calculated by determining the maximum compression speed
Summary
E structure of this scheme is completely symmetrical on the left and right, which is consistent with the symmetry of the mass distribution of the vehicle. It can be regarded as composed of two identical cylinders with the reverse pressure chamber sharing the accumulator. Due to the communication of the oil circuit, the pressure in the small chamber of the oil cylinder on the other side will increase, forcing the body on the other side to have a downward trend. On the rising side, the pressure in the piston-side chamber of the oil cylinder decreases, and the body on the other side will move upward when the oil is inhaled. It can be seen that the communication between the left and right oil lines has an antiroll effect
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