Closed type walking hydraulic system and control method thereof, working machine
By adding pressure-limiting valves and control methods to the closed-loop hydraulic system, and calculating and correcting the maximum displacement of the travel pump based on operating parameters, the problem of the travel pump displacement exceeding the safety limit was solved, thus achieving safe and efficient operation of the equipment.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- ZOOMLION HEAVY MASCH CO LTD
- Filing Date
- 2026-04-30
- Publication Date
- 2026-07-17
AI Technical Summary
In existing closed-loop hydraulic systems, the displacement of the travel pump lacks an adaptive limiting mechanism based on operating conditions. This can lead to the pump exceeding its safety limit under different operating conditions, resulting in problems such as component damage or engine stalling.
By adding a pressure limiting valve to the displacement control oil circuit of the traveling pump, and combining the current operating parameters with the control method, the theoretical maximum allowable displacement of the traveling pump is calculated. The displacement is then limited by the pressure limiting valve, and closed-loop correction is performed in combination with preset evaluation parameters to ensure that the displacement is within the safety boundary.
This effectively avoids torque and power overload problems caused by excessive displacement of the mobile pump, ensuring safe and efficient operation of the equipment under different working conditions.
Smart Images
Figure CN122407648A_ABST