A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Hydraulic quick-change device control loop for excavator
The invention discloses a hydraulic quick-change device control loop for an excavator, which comprises a quick-change oil cylinder comprising a rod cavity and a rodless cavity; the first reversing valve is used for switching oil feeding of the rod cavity and the rodless cavity, and the first reversing valve is connected with the rod cavity through a rod cavity oil way and connected with the rodless cavity through a rodless cavity oil way; the load-sensitive pump is used for providing a hydraulic source for the action of a movable arm of the excavator; the first hydraulic source is provided with hydraulic oil with stable pressure; two oil inlets of the shuttle valve are connected with an oil outlet of the load-sensitive pump and a first hydraulic source respectively, and an oil outlet of the shuttle valve is connected with an oil inlet of the first reversing valve through a first oil inlet path. By introducing the first hydraulic source and under the selection effect of the shuttle valve, it can be guaranteed that the first oil inlet way has the oil source pressure at least not lower than that of the first hydraulic source and outputs the oil source pressure to the quick-change oil cylinder, pressure maintaining of a rodless cavity of the quick-change oil cylinder is facilitated, and meanwhile compared with the prior art, continuous loading of the load-sensitive pump and the engine can be avoided.
本发明公开了一种挖掘机用液压快换装置控制回路，包括：快换油缸，其包括有杆腔和无杆腔；第一换向阀，其用于使有杆腔和无杆腔切换进油，第一换向阀通过有杆腔油路与有杆腔相连，并通过无杆腔油路与无杆腔相连；负载敏感泵，其用于对挖掘机的动臂动作提供液压源；第一液压源，其具有稳定压力的液压油；梭阀，其两个进油口分别与负载敏感泵的出油口和第一液压源相连，梭阀的出油口和第一换向阀的进油口通过第一进油路相连。通过引入第一液压源，并在梭阀的选择作用下，可以保证第一进油路具有至少不低于第一液压源的油源压力输出到快换油缸，有利于使快换油缸的无杆腔保压，同时相比于现有技术，可避免负载敏感泵及发动机持续带载。
Hydraulic quick-change device control loop for excavator
The invention discloses a hydraulic quick-change device control loop for an excavator, which comprises a quick-change oil cylinder comprising a rod cavity and a rodless cavity; the first reversing valve is used for switching oil feeding of the rod cavity and the rodless cavity, and the first reversing valve is connected with the rod cavity through a rod cavity oil way and connected with the rodless cavity through a rodless cavity oil way; the load-sensitive pump is used for providing a hydraulic source for the action of a movable arm of the excavator; the first hydraulic source is provided with hydraulic oil with stable pressure; two oil inlets of the shuttle valve are connected with an oil outlet of the load-sensitive pump and a first hydraulic source respectively, and an oil outlet of the shuttle valve is connected with an oil inlet of the first reversing valve through a first oil inlet path. By introducing the first hydraulic source and under the selection effect of the shuttle valve, it can be guaranteed that the first oil inlet way has the oil source pressure at least not lower than that of the first hydraulic source and outputs the oil source pressure to the quick-change oil cylinder, pressure maintaining of a rodless cavity of the quick-change oil cylinder is facilitated, and meanwhile compared with the prior art, continuous loading of the load-sensitive pump and the engine can be avoided.
本发明公开了一种挖掘机用液压快换装置控制回路，包括：快换油缸，其包括有杆腔和无杆腔；第一换向阀，其用于使有杆腔和无杆腔切换进油，第一换向阀通过有杆腔油路与有杆腔相连，并通过无杆腔油路与无杆腔相连；负载敏感泵，其用于对挖掘机的动臂动作提供液压源；第一液压源，其具有稳定压力的液压油；梭阀，其两个进油口分别与负载敏感泵的出油口和第一液压源相连，梭阀的出油口和第一换向阀的进油口通过第一进油路相连。通过引入第一液压源，并在梭阀的选择作用下，可以保证第一进油路具有至少不低于第一液压源的油源压力输出到快换油缸，有利于使快换油缸的无杆腔保压，同时相比于现有技术，可避免负载敏感泵及发动机持续带载。
Hydraulic quick-change device control loop for excavator
一种挖掘机用液压快换装置控制回路
GUAN WEI (author) / ZHANG HAO (author) / HUANG XING (author) / ZHANG XINHAI (author) / WANG GAOLONG (author)
2022-03-18
Patent
Electronic Resource
Chinese
IPC:
E02F
Baggern
,
DREDGING
HYDRAULIC EXCAVATOR ATTACHMENT QUICK COUPLER WITH SAFETY DEVICE
| European Patent Office | 2015