Hydraulic control system for hydro-pneumatic suspension of five-axis dumper

Abstract

The invention discloses a hydraulic control system for a hydro-pneumatic suspension of a five-axis dumper, comprising a suspension base station, a gear oil pump, a hydraulic oil tank and an oil way connected with the hydraulic oil tank, and also comprising a cargo box / suspension changeover valve, a cargo box hoisting valve, a front suspension valve, a rear suspension valve, a gear oil pump, a three-bridge lifting valve, a plurality of oil cylinders, a pipeline filter and an oil inlet filter, wherein the hydraulic oil tank is connected with the oil inlet filter through the oil way, the oil inlet filter is connected with the cargo box / suspension changeover valve, and the cargo box / suspension changeover valve is used for controlling the changeover of a cargo box hoisting system and a suspension system. According to the invention, the technology of the hydro-pneumatic suspension is applied to the dumper, so that the smoothness of the dumper is improved, the service life of the dumper is prolonged, and the safety of the dumper during unloading at a cross slope is enhanced; the hydraulic control system and the existing system of the dumper share hydraulic elements, so that the space is saved, and the cost is reduced; by adopting the idea of a balanced suspension, the oil cylinders of the suspension are in grouped parallel connection; and the oil cylinders at two sides of the dumper are interconnected, so that the inclination angle of the dumper during turning is reduced, and the effect of a stabilizer bar of the dumper is achieved.

Description

technical field [0001] The invention relates to a hydraulic control system for an oil-gas suspension of a five-axis dump truck, belonging to the field of dump truck equipment. Background technique [0002] At present, the suspension system of road transport vehicles and off-road transport vehicles below 100 tons is mainly leaf spring type. The proportion of dump trucks used in engineering is relatively large. In order to reduce the weight of the whole vehicle, make the vehicle have better ride comfort, improve the safety performance of vehicle operation and unloading, etc., a five-axis automatic dump truck with oil-gas suspension as the core technology has been developed. unloading. [0003] Compared with the traditional leaf spring suspension, the hydropneumatic suspension system has the following advantages: [0004] 1) Nonlinear stiffness. The stiffness of the traditional suspension remains basically unchanged because the stiffness of the elastic elements is mostly lin...

AI Technical Summary

Problems solved by technology

[0009] However, compared with the traditional suspension, the development of the existing oil-pneumatic suspension has higher requirements for the performance matching of each component, and the investment in the product is relatively large; and for each vehicle type, it is necessary to do load-bearing and shock-absorbing aspects. Design calculations and a lot of experimental work, so the application of this technology is currently in the transition period from high-end technology to the commercial market, and is gradually being applied to commercial vehicle products

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