A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Excavator hydraulic control system and excavator
The invention relates to the field of excavators, and discloses an excavator hydraulic control system and an excavator. The excavator hydraulic control system comprises a main pump coaxially connected with a pilot pump, and the main pump and the pilot pump are both connected with an oil tank; the main valve is connected with the main pump through a main oil inlet path; the first electromagnetic valve and the second electromagnetic valve are connected with the pilot pump through a pilot main oil way, the first electromagnetic valve is connected to one end of the main valve through a first pilot oil way, and the second electromagnetic valve is connected to the other end of the main valve through a second pilot oil way; the back pressure valve is connected with the first electromagnetic valve through a first pilot oil way and connected with the oil tank through a pilot oil return way; the accessory oil cylinder and the rodless cavity are connected with the main valve through a first oil way, the rod cavity is connected with the back pressure valve and the main valve through a second oil way, the first oil way is provided with a first adjusting valve, and the second oil way is provided with a second adjusting valve. And after the return oil of the accessory oil cylinder passes through the second regulating valve, one path returns to the oil tank from the main valve, and the other path returns to the oil tank from the back pressure valve, so that the return oil back pressure of the accessory oil cylinder is greatly reduced.
本发明涉及挖掘机领域，公开了一种挖掘机液压控制系统及挖掘机。挖掘机液压控制系统包括：主泵，与先导泵同轴连接，主泵和先导泵均与油箱连接；主阀，通过主进油路与主泵连接；第一电磁阀和第二电磁阀，通过先导主油路与先导泵连接，且第一电磁阀通过第一先导油路连接至主阀的一端，第二电磁阀通过第二先导油路连接至主阀的另一端；背压阀，通过第一先导油路与第一电磁阀连接并通过先导回油路与油箱连接；属具油缸，无杆腔通过第一油路与主阀连接，有杆腔通过第二油路分别与背压阀、主阀连接，第一油路设有第一调节阀，第二油路设有第二调节阀。属具油缸的回油经第二调节阀后一路从主阀回油箱，一路从背压阀回油箱，两路同时回油大大减小了属具油缸的回油背压。
Excavator hydraulic control system and excavator
The invention relates to the field of excavators, and discloses an excavator hydraulic control system and an excavator. The excavator hydraulic control system comprises a main pump coaxially connected with a pilot pump, and the main pump and the pilot pump are both connected with an oil tank; the main valve is connected with the main pump through a main oil inlet path; the first electromagnetic valve and the second electromagnetic valve are connected with the pilot pump through a pilot main oil way, the first electromagnetic valve is connected to one end of the main valve through a first pilot oil way, and the second electromagnetic valve is connected to the other end of the main valve through a second pilot oil way; the back pressure valve is connected with the first electromagnetic valve through a first pilot oil way and connected with the oil tank through a pilot oil return way; the accessory oil cylinder and the rodless cavity are connected with the main valve through a first oil way, the rod cavity is connected with the back pressure valve and the main valve through a second oil way, the first oil way is provided with a first adjusting valve, and the second oil way is provided with a second adjusting valve. And after the return oil of the accessory oil cylinder passes through the second regulating valve, one path returns to the oil tank from the main valve, and the other path returns to the oil tank from the back pressure valve, so that the return oil back pressure of the accessory oil cylinder is greatly reduced.
本发明涉及挖掘机领域，公开了一种挖掘机液压控制系统及挖掘机。挖掘机液压控制系统包括：主泵，与先导泵同轴连接，主泵和先导泵均与油箱连接；主阀，通过主进油路与主泵连接；第一电磁阀和第二电磁阀，通过先导主油路与先导泵连接，且第一电磁阀通过第一先导油路连接至主阀的一端，第二电磁阀通过第二先导油路连接至主阀的另一端；背压阀，通过第一先导油路与第一电磁阀连接并通过先导回油路与油箱连接；属具油缸，无杆腔通过第一油路与主阀连接，有杆腔通过第二油路分别与背压阀、主阀连接，第一油路设有第一调节阀，第二油路设有第二调节阀。属具油缸的回油经第二调节阀后一路从主阀回油箱，一路从背压阀回油箱，两路同时回油大大减小了属具油缸的回油背压。
Excavator hydraulic control system and excavator
挖掘机液压控制系统及挖掘机
FANG XIBIN (author) / XUE XIAOXIN (author) / WANG YONGWEN (author)
2024-04-05
Patent
Electronic Resource
Chinese
IPC:
E02F
Baggern
,
DREDGING
| European Patent Office | 2022
Excavator accessory hydraulic control system and excavator
| European Patent Office | 2023