Hydraulic system for automatic leveling test bench

Abstract

The invention provides a hydraulic system for an automatic leveling test bench. A lower supporting frame is connected with four supporting hydraulic cylinders; piston rods of the supporting hydrauliccylinders are fixedly connected with bearing discs; four connecting steel pipes are hinged to the lower part of an upper supporting frame, every two connecting steel pipes are fixedly connected with the two ends of an upper transverse beam, and the ends of the upper transverse beams are fixedly connected with sliding shoes arranged on the bearing discs through supporting bolts; a horizontal dip angle sensor is mounted in the middle of an upper frame; a controller is connected with the four supporting hydraulic cylinders through four electromagnetic proportional reversing valves and further connected with leveling hydraulic cylinders through the four electromagnetic proportional reversing valves; displacement sensors are arranged on the supporting hydraulic cylinders, and hydraulic operatedreversing valves and variable throttle valves are arranged on oil circuit where rodless cavities of the supporting hydraulic cylinders are located; and the leveling hydraulic cylinders are provided with displacement sensors and speed sensors. According to the hydraulic system, multiple road surface roughness can be simulated, different traveling speeds of vehicles can be simulated, and the leveling effect can be verified in real time in the test process.

Description

technical field [0001] The invention belongs to the technical field of agricultural machinery test equipment, and in particular relates to a hydraulic system for automatic leveling test benches. Background technique [0002] In recent years, with the development of automatic leveling technology, it has been widely used in the fields of construction machinery and agricultural machinery, effectively improving the passability and driving comfort of the machine. In agricultural machinery, the automatic leveling function is often realized by installing a hydraulic suspension, so that the agricultural machinery can automatically level the frame on uneven roads, so as to be better suitable for hilly and mountainous terrain operations. [0003] Because the hydraulic suspension needs to be adjusted in real time, it is easy to cause a series of problems such as high heat generation and slow response of the hydraulic system, and may even cause the failure of the whole machine. There is...

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Problems solved by technology

[0003] Because the hydraulic suspension needs to be adjusted in real time, it is easy to cause a series of problems such as high heat generation and slow response of the hydraulic system, and may even cause the failure of the whole machine. There is an urgent need for a test bench to test and analyze the leveling system to improve research and development efficiency and reduce R&D cost

But at the same time, the automatic leveling system lacks effective test methods due to the difficulty of simulating the road spectrum and high test costs.

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