Auxiliary control device for hydraulic system of excavator: Fid-Bau Portal

Auxiliary control device for hydraulic system of excavator

FU WENBO / ZENG DAXING / LU WENJUAN / LIU HAITAO

The invention discloses an auxiliary control device for a hydraulic system of an excavator, which relates to the field of control of the hydraulic system of the excavator and comprises three control sub-modules and a controller, the first control submodule is arranged between the bucket rod main valve and the bucket rod hydraulic cylinder; the second control submodule is arranged between the movable arm main valve and the movable arm hydraulic cylinder; the third control submodule is arranged between the rotary main valve and the rotary motor; the controller adjusts the flow between the bucket rod main valve and the bucket rod hydraulic cylinder and the flow between the two working cavities of the bucket rod hydraulic cylinder through the first control sub-module, and adjusts the flow between the movable arm main valve and the movable arm hydraulic cylinder and the flow between the two working cavities of the movable arm hydraulic cylinder through the second control sub-module. And the flow between the rotary main valve and the rotary motor and the flow between the two working cavities of the rotary motor are adjusted through the third control sub-module. The system flow distribution characteristic can be improved, the controllability of the regeneration flow of the movable arm/bucket rod hydraulic cylinder is improved, and the braking stability of an actuator is improved.

本发明公开一种挖掘机液压系统辅助控制装置，涉及挖掘机液压系统控制领域，该辅助控制装置包括：三个控制子模块和一个控制器；第一控制子模块设置在斗杆主阀与斗杆液压缸之间；第二控制子模块设置在动臂主阀与动臂液压缸之间；第三控制子模块设置在回转主阀和回转马达之间；控制器通过第一控制子模块调节斗杆主阀与斗杆液压缸之间及斗杆液压缸两工作腔之间的流量，通过第二控制子模块调节动臂主阀与动臂液压缸之间及动臂液压缸两工作腔之间的流量，通过第三控制子模块调节回转主阀和回转马达之间及回转马达两工作腔之间的流量。本发明能够改善系统流量分配特性、增加动臂/斗杆液压缸再生流量的可控性、提高执行器制动平稳性。

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