Excavator bucket rod acceleration hydraulic system

Abstract

The invention belongs to the technical field of engineering machinery, and discloses an excavator bucket rod acceleration hydraulic system. The excavator bucket rod acceleration hydraulic system comprises a first main pump and a second main pump for providing working oil for the hydraulic system, a pilot pump for providing pilot oil for the hydraulic system, and a movable arm oil cylinder and a bucket rod oil cylinder which are used as actuators, the system further comprises a movable arm-to-bucket rod loop regeneration control valve arranged between the movable arm oil cylinder and a movable arm first control valve and a movable arm second control valve, wherein the movable arm-to-bucket rod loop regeneration control valve is used for controlling the switching between regeneration and non-regeneration between driving loops for regenerating the bucket rod oil cylinder from a rodless cavity or a rod cavity of the movable arm oil cylinder. The excavator bucket rod acceleration hydraulic system has the advantages that the driving loops for regeneration from the rodless cavity and the rod cavity of the movable arm oil cylinder to a bucket rod oil way is integrally designed, switching between regeneration and non-regeneration between loops can be achieved through the movable arm-to-bucket rod loop regeneration control valve, and flow regeneration switching between the loops under multiple working conditions can be achieved.

Description

technical field [0001] The invention belongs to the technical field of excavator hydraulic drive systems, and relates to an excavator arm speed-increasing hydraulic system. Background technique [0002] The excavator hydraulic drive system can carry out compound actions of multiple hydraulic cylinders to complete the excavator operation cycle. The compound action of the boom and stick involves multiple working conditions such as excavation, unloading, and leveling, which is important for the operating efficiency and energy consumption of the excavator. Influence. When the boom of the excavator is lowered and the arm is in compound action, a small part of the oil return flow from the rodless chamber of the boom cylinder is regenerated to the rod chamber of the boom cylinder to meet its own regeneration needs, and the rest of the flow is directly returned to the oil tank, which is not fully utilized; Under excavation conditions, the boom rises and the stick moves in combinati...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problems in the prior art that the regenerative control from the small cavity of the boom to the arm circuit cannot be realized, and the speed-up of the stick and the efficiency improvement capacity are limited, the present invention provides a hydraulic system for speed-up of the stick of an excavator. Arm cylinder rodless cavity, rod cavity to the stick oil circuit regeneration drive circuit, through the boom to the stick circuit regeneration control valve can realize the switching between regeneration and non-regeneration between circuits, and can realize the circuit between circuits under multiple working conditions Flow regeneration switch

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