Hydraulic control method and control system for excavator

• Main Authors: BI JINMIN, DONG BICHENG, LIANG MINGKONG, WANG QIEREN, LIU JIAN, LI WENXIN
• Format: Patent
• Language: Chinese; English
• Published: 06.04.2018
• Subjects: DREDGING; FIXED CONSTRUCTIONS; FOUNDATIONS; HYDRAULIC ENGINEERING; SOIL SHIFTING

The invention relates to a hydraulic system of an excavator. In order to solve the problem that an existing excavator has a nodding phenomenon during working on a flat ground, the invention provides ahydraulic control method for the excavator. A bucket rod regeneration control valve is arranged on an oil return oil path of a bucket rod control valve of the excavator; and when the excavator is ina state of working on the flat ground, the opening degree of a valve port of the bucket rod regeneration control valve is controlled to meet the requirement that the opening degree of the valve port of the bucket rod regeneration control valve at the initial stage of bucket rod recycling is greater than that of the valve port of the bucket rod regeneration control valve at the later stage of bucket rod recycling. According to the hydraulic control method for the excavator, when the excavator is in the state of working on the flat ground, the opening degree of the valve port of the bucket rod regeneration control valve