Xcmg Excavator Machinery Co., Ltd

Xuzhou Xugong Excavator Machinery Co., Ltd

Zong Li

Jiasheng Qin

Hong Zhang

Kai Liu

Yong Wang

Shengxia Zhang

Jian Zhang

Mingjun Liao

Yufeng Yang

Zhipeng Li

Shuhui Fei

Yang Zheng

Zhenxing Wang

Jijiang Shi

Jianchang Gao

Benqiang Sun

A rotatory energy recycling control device for a hydraulic excavator, comprising: an oil line selector valve (), a direction selector valve (), a sequencing valve (), a one-way valve () and an overflow valve (); two oil inlets of the oil line selector valve () are respectively connected to an opening A and an opening B of a rotary motor; an oil outlet of the oil line selector valve () is connected to an inlet of the direction selector valve (); an outlet of the direction selector valve () is connected to an net of the sequencing valve (); a drainage port of the sequencing valve () is connected to an oil tank; an outlet of the sequencing valve () and an net of the one-way valve () communicate with the overflow valve (): the outlet of the one-way valve () is connected to an energy storage and utilization device; and an outlet of the overflow valve () is connected to the oil tank. One device can simultaneously achieve energy recycling from rotatory start and deceleration braking with fewer components and simplified piping designs.

Rotatory energy recycling control device for hydraulic excavator

Disclosed is an apparatus for improving excavating operation characteristic and grading operation characteristic of an excavator. The apparatus includes a solenoid valve group and a hydraulically controlled selector valve. An oil controlling output Aof the solenoid valve group is configured in series with oil controlling input aof the hydraulic control valve. An oil controlling output Aof the solenoid valve group is configured in series with a pilot control end XBaof a multi-port valve group. An oil return port Tof the solenoid valve group is connected to the hydraulic oil tank. An oil controlling output bof the hydraulically controlled selector valve is connected to a pilot control end XAbof the multiplexer valve group, and an oil return port Tof the hydraulically controlled selector valve is connected with the hydraulic oil tank. The apparatus improves operational efficiency and control comfortability.

Apparatus for improving excavating operation characteristic and grading operation characteristic of excavator

A method for improving excavating operation characteristic and grading operation characteristic of an excavator is disclosed. A hydraulically controlled selector valve is added in a boom confluence control circuit of a hydraulic excavator, and a solenoid valve group is added in the boom confluence control circuit and the bucket/stick confluence control circuit. A controller sends a control signal to switch the solenoid valve group between a disconnected mode and a connected mode. The controller may send out a signal to disconnect the solenoid valve group, to restore a valve spool to a middle position, to restore a boom lifting confluence circuit, and to disconnect a bucket/stick swinging confluence circuit to perform a standard excavation mode. The controller may send out a signal to connect the solenoid valve group to disconnect a boom lifting confluence circuit and to increase a bucket/stick swinging confluence circuit to achieve a grading operation mode.

Method for improving excavating operation characteristic and grading operation characteristic of excavator

Growing community of inventors

Xuzhou, China

Zong Li