Xuzhou Xcmg Excavator Machinery Co., Ltd

Inner Mongolia Yitai Coal-based New Materials Research Institute Co., Ltd.

Heng Miao

Jian Zhang

Yang Zhang

Juncheng Li

Zhen Qian

Yuzhong Dong

Jiawen Geng

Qinge Jian

Yuefeng Jin

Xinkui Zhang

Yunbo Xiao

Benqiang Sun

Jie Lu

Dongyang Du

Quan Yuan

Shangjun Nan

Jinhui Huang

Jishen Lin

Xiaodong Li

Yan Zhou

Lianglan Guo

Huiyue Zheng

Guoqing Ma

A hydraulic system for a rotary implement, including an oil tank, a main pump, a control valve, and a rotary motor is provided. The oil tank is connected to an oil suction port of the main pump; an oil outlet of the main pump is connected to a P port of the control valve; a T port of the control valve is interconnected with the oil tank; and A and B ports of the control valve are connected to both ends of the rotary motor. The control valve includes a compensation valve connected to the P port and the T port, an electric proportional valve connected to the P port and the compensation valve, and an electromagnetic reversing valve connected to the compensation valve, the T port and the B port.

Hydraulic system for rotary implement

Disclosed are a hydraulic control system for boom floating of an excavator and a control method thereof. In the hydraulic circuit, a main pump supplies oil to the boom cylinder through a boom reversing valve, and two working ports of the boom reversing valve are connected to a rod cavity and a rodless cavity of the boom cylinder respectively. A rod cavity floating valve and a rodless cavity floating valve are connected to an oil circuit between the rod cavity of the boom cylinder and the boom reversing valve and an oil circuit between the rodless cavity of the boom cylinder and the boom reversing valve respectively. A pilot oil pump and a handle pilot valve are arranged on the pilot oil circuit, an oil inlet of the handle pilot valve is connected to the pilot oil pump.

Hydraulic control system for boom floating of excavator and control method thereof

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Jiangsu, China

Heng Miao