Hydraulic system of aerial operation truck with two folding booms

Abstract

The invention relates to a hydraulic system of an aerial operation truck with two folding booms. The hydraulic system is provided with an oil cylinder I, an oil cylinder II and a rotary motor, wherein the oil cylinder I is a lower boom variable-amplitude oil cylinder, the oil cylinder II is an upper boom variable-amplitude oil cylinder, and the rotary motor is a cycloid hydraulic motor. The hydraulic system is characterized in that the oil cylinder I is connected with a reversing valve I-A through a flow valve I, the oil cylinder II is connected with a reversing valve I-B through a flow valve II, the rotary motor is connected with a reversing valve III, the reversing valve II is simultaneously communicated with the reversing valve I-A, the reversing valve I-B and the reversing valve III, and is communicated with a hydraulic valve, the hydraulic pump is communicated with an oil tank, the oil tank is communicated with the hydraulic pump through an oil absorbing filter, the oil tank is communicated with the reversing valve III through an oil return filter, the oil cylinder I and the oil cylinder II are respectively communicated with atmosphere through pipelines, and a damping throttling plug is arranged between the reversing valve III and the rotary valve. The hydraulic system has the advantages that under the condition of low cost, the hydraulic system of a boom frame is stably and reliably controlled, and the problems of shaking, instability and large impact when the aerial working truck operates and controls the boom frame to lift are solved.

Description

technical field [0001] The invention relates to a hydraulic system, in particular to a hydraulic system of a two-section folding arm high-altitude operation vehicle, which belongs to the field of hydraulic control. Background technique [0002] Hydraulic transmission uses liquid as the working medium to transmit power. Hydraulic transmission uses the pressure of liquid to transmit power. Almost all modern construction machinery adopts hydraulic system, which is combined with electronic system and computer control technology to become an important part of modern construction machinery. The performance of the hydraulic system, in addition to meeting the functional requirements, should be determined from the efficiency of the hydraulic system, power utilization, speed range, fine-tuning characteristics, vibration, noise, and the convenience of system installation and debugging. The traditional high-altitude vehicle jib oil cylinder is equipped with a balance valve and adopts ...

AI Technical Summary

Problems solved by technology

It is inconvenient to adjust the pressure of the balance valve frequently, especially when the boom is lifted to a certain height, it cannot be adjusted at all, and there is also a certain degree of safety hazard - if the pressure is not adjusted properly, the boom will stall and fall, causing danger

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