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A platform for research: civil engineering, architecture and urbanism
Excavator hydraulic system and excavator
The invention discloses an excavator hydraulic system and an excavator. Hydraulic oil output by a variable pump enters a bucket rod link and a movable arm link through a P port of a main valve; the bucket rod joint is used for driving a bucket rod oil cylinder and comprises a bucket rod valve element, an inlet of the bucket rod valve element is communicated with a port P of the main valve, a first working oil port of the bucket rod valve element is connected with a small cavity of the bucket rod oil cylinder and an inlet of a first bucket rod overflow valve, and a second working oil port of the bucket rod valve element is connected with a large cavity of the bucket rod oil cylinder and an inlet of a second bucket rod overflow valve. Outlets of the bucket rod overflow valve I and the bucket rod overflow valve II are respectively connected with an oil return port of the main valve; a compensation oil port of the bucket rod valve core is connected with an inlet of the bucket rod compensator; a first control oil port of the bucket rod compensator is connected with an Ls port of the main valve, and a second control oil port of the bucket rod compensator is connected with an oil return port of the main valve through the two-position two-way electromagnetic valve and the stable overflow valve in sequence. And the stable overflow valve is used for keeping the excavator working in a set working limit state. The excavator can stably work according to the set load, and the problem that the whole excavator is unstable is avoided.
本发明公开一种挖掘机液压系统及挖掘机，变量泵输出的液压油通过主阀的P口进入斗杆联和动臂联；斗杆联用于驱动斗杆油缸，包括斗杆阀芯，斗杆阀芯的入口与主阀的P口连通，斗杆阀芯的工作油口一分别连接斗杆油缸的小腔、斗杆溢流阀一的入口，工作油口二分别连接斗杆油缸的大腔、斗杆溢流阀二的入口；斗杆溢流阀一、斗杆溢流阀二的出口分别与主阀的回油口连接；斗杆阀芯的补偿油口连接斗杆补偿器的入口；斗杆补偿器的控制油口一与主阀的Ls口连接，控制油口二依次通过两位两通电磁阀、稳定溢流阀与主阀回油口连接；稳定溢流阀用于保持挖掘机工作在设定的工作极限状态。本发明能够使挖掘机按照设定载荷稳定工作，避免出现整机不稳的问题。
Excavator hydraulic system and excavator
The invention discloses an excavator hydraulic system and an excavator. Hydraulic oil output by a variable pump enters a bucket rod link and a movable arm link through a P port of a main valve; the bucket rod joint is used for driving a bucket rod oil cylinder and comprises a bucket rod valve element, an inlet of the bucket rod valve element is communicated with a port P of the main valve, a first working oil port of the bucket rod valve element is connected with a small cavity of the bucket rod oil cylinder and an inlet of a first bucket rod overflow valve, and a second working oil port of the bucket rod valve element is connected with a large cavity of the bucket rod oil cylinder and an inlet of a second bucket rod overflow valve. Outlets of the bucket rod overflow valve I and the bucket rod overflow valve II are respectively connected with an oil return port of the main valve; a compensation oil port of the bucket rod valve core is connected with an inlet of the bucket rod compensator; a first control oil port of the bucket rod compensator is connected with an Ls port of the main valve, and a second control oil port of the bucket rod compensator is connected with an oil return port of the main valve through the two-position two-way electromagnetic valve and the stable overflow valve in sequence. And the stable overflow valve is used for keeping the excavator working in a set working limit state. The excavator can stably work according to the set load, and the problem that the whole excavator is unstable is avoided.
本发明公开一种挖掘机液压系统及挖掘机，变量泵输出的液压油通过主阀的P口进入斗杆联和动臂联；斗杆联用于驱动斗杆油缸，包括斗杆阀芯，斗杆阀芯的入口与主阀的P口连通，斗杆阀芯的工作油口一分别连接斗杆油缸的小腔、斗杆溢流阀一的入口，工作油口二分别连接斗杆油缸的大腔、斗杆溢流阀二的入口；斗杆溢流阀一、斗杆溢流阀二的出口分别与主阀的回油口连接；斗杆阀芯的补偿油口连接斗杆补偿器的入口；斗杆补偿器的控制油口一与主阀的Ls口连接，控制油口二依次通过两位两通电磁阀、稳定溢流阀与主阀回油口连接；稳定溢流阀用于保持挖掘机工作在设定的工作极限状态。本发明能够使挖掘机按照设定载荷稳定工作，避免出现整机不稳的问题。
Excavator hydraulic system and excavator
一种挖掘机液压系统及挖掘机
YUE SUHUA (author) / ZHAO PENGKUN (author) / ZHANG FEI (author)
2023-11-28
Patent
Electronic Resource
Chinese
IPC:
E02F
Baggern
,
DREDGING
Excavator main valve, excavator hydraulic system and excavator
| European Patent Office | 2023
| European Patent Office | 2022