Anti-shake hydraulic circuit, cantilever crane anti-shake hydraulic circuit, engineering machinery and engineering vehicle

Abstract

The invention discloses an anti-shake hydraulic circuit which comprises an oil cylinder, a reversing valve, an oil pump and an oil tank. The oil inlet of the reversing valve is connected with the oil pump. The oil outlet of the reversing valve is connected with the oil tank. The first working oil port of the reversing valve is connected with a rodless cavity of the oil cylinder, the second working oil port of the reversing valve is connected with the rod cavity of the oil cylinder, and stretching reversing control of the oil cylinder can be achieved. The anti-shake hydraulic circuit further comprises a balance valve and a reducing valve. The balance valve is disposed on the first connecting pipeline. The control port of the balance valve is connected with a second connecting pipeline through the reducing valve. The invention further discloses a cantilever crane anti-shake hydraulic circuit, engineering machinery and an engineering vehicle. By the arrangement, the opening of the balance valve can be matched with the working flow under any working conditions, and fierce shaking of the cantilever crane during operation, especially when the cantilever crane affected by gravity or during descending of the cantilever crane, can be avoided.

Description

technical field [0001] The invention relates to engineering machinery, in particular to an anti-shake hydraulic circuit, a boom anti-shake hydraulic circuit, engineering machinery and engineering vehicles. Background technique [0002] For engineering vehicles with booms, the control cylinders of the booms (such as luffing cylinders, telescopic cylinders, etc.) are usually equipped with balance valves. Balancing valves include the functions of check valves and sequence valves , so as to play the role of locking the control cylinder and maintaining the smooth movement of the piston rod of the control cylinder, especially when the boom is lowered, the relatively smooth retraction of the piston rod can be maintained. [0003] At present, in construction machinery, whether it is the telescopic circuit or the luffing circuit that controls the movement of the boom, due to the comprehensive consideration of cost and installation controls, a large number of cartridge balance valves ...

AI Technical Summary

Problems solved by technology

In actual work, affected by factors such as load, environment, and action speed, the pressure at the control port of the balance valve will fluctuate during the retraction process of the oil cylinder, causing the opening size of the balance valve to fluctuate accordingly, resulting in The pressure shock causes the jib to vibrate violently

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