Jiangsu Hengli Hydraulic Technology Co., Ltd.

Jiangsu Hengli Hydraulic Co., Ltd

Hongguang Liu

Liping Wang

Qiang Lu

Zhan Chen

Guoliang Zhang

Junxiang Han

Guohe Huang

Jing Jia

Liang Ha

Li Zhai

Caifu Yuan

Wangbo Yuan

Zhonghua Zhou

A hydraulic multi-way valve with independent oil-port control, includes a multi-way valve body, an A valve core and a B valve core. The multi-way valve body has an A oil port and a B oil port, and includes an A cavity and a B cavity independent from each other therein. The A oil port, a P high-pressure oil port and a T high-pressure oil port are all in communication with the A cavity, the B oil port, the P high-pressure oil port and the T high-pressure oil port are all in communication with the B cavity. The A valve core is arranged in the A cavity, and the B valve core is arranged in the B cavity.

Hydraulic multi-way valve with independent oil-port control, and control method therefor

A regeneration control hydraulic system for an excavator, including at least one hydraulic pump, an actuator, a regeneration oil path, and a regeneration cut-off oil path. The regeneration oil path is configured to send a return oil as a regeneration oil to a cavity having a negative pressure of the actuator. The regeneration oil path is provided with a regeneration valve and a first control valve. The first control valve is configured to control the regeneration oil to enter the cavity having the negative pressure of the actuator when a working device of the excavator retracts inwards, or to control the oil to be discharged from the actuator to the regeneration cut-off oil path when the working device swings outwards. The regeneration cut-off oil path is configured to send the regeneration oil passing through the regeneration valve or the oil discharged from the actuator to other destinations.

Regeneration control hydraulic system

Disclosed is an energy-recycling hydraulic control main valve, which is provided with end covers, a valve core, a left one-way valve and a right one-way valve; the left one-way valve is composed of a left valve seat, a left cone valve core and a left spring; a conical surface of the left cone valve core is closely attached to a left conical surface of the valve core by the spring force; the right one-way valve is composed of a right valve seat, a right cone valve core and a right spring; and a conical surface of the right cone valve core is closely attached to a right conical surface of the valve core by spring force. The hydraulic main control valve can not only limit the falling speed of a piston, but use the potential energy generated by the gravity action on the piston, thereby achieving energy recycling.

Energy-recycling hydraulic control main valve

A pressure compensation valve comprises a valve body, a valve sleeve fixedly mounted on the valve body, and a spool disposed in a valve hole of the valve body and capable of moving. The pressure compensation valve can change the pressure compensation characteristic, that is, the pressure compensation valve can change the difficult degree of the pressurized oil liquid flowing by changing an effective pressure acting surface of the pressure compensation valve The structure is simple, requires low cost, and increases the utilization rate of a product.

Pressure compensation valve

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Jiangsu, China

Hongguang Liu