Excavator Hydraulic Pump Standby Flow for Hoisting Control
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Solution Overview
Problem
There is a need to improve the operability of shovels during hoisting work, as existing technologies do not adequately enhance this aspect.
Innovation Solution
A shovel system is designed with a control device that sets a higher standby flow rate for the hydraulic pump when a specific hoisting work mode is selected, improving the attachment's operability during hoisting operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a standard standby flow rate is used for the hydraulic pump, then energy consumption is reduced during normal operations, but the responsiveness and operability during hoisting work deteriorates
Solution Approach 1:
The hydraulic pump's standby flow rate is made dynamic rather than fixed. The control device automatically adjusts the standby flow rate based on the detected work mode: using a first (lower) standby flow rate for normal excavation work to save energy, and switching to a second (higher) standby flow rate when hoisting work mode is detected, thereby optimizing both energy efficiency and operational responsiveness
Solution Approach 2:
The patent changes the operational parameter (standby flow rate) of the hydraulic pump according to different work conditions. By detecting the work mode through the control device and adjusting the flow rate parameter accordingly, the system adapts to different operational requirements without manual intervention
2Speed
If a higher standby flow rate is always used for the hydraulic pump, then the responsiveness during hoisting work is improved, but energy consumption during normal operations increases
Solution Approach 1:
The system dynamically adjusts the hydraulic pump's standby flow rate based on real-time detection of work mode. During normal excavation operations, a lower first standby flow rate is maintained for energy efficiency. When hoisting work mode is detected by the control device, the system automatically switches to a higher second standby flow rate to ensure responsive and accurate attachment operation
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The increased standby flow rate enhances the responsiveness and accuracy of the shovel's attachment during hoisting work, making the operation more efficient and manageable for the operator.
Implementation Method 1
a hydraulic pump configured to supply hydraulic oil to the boom cylinder and the arm cylinder
Data Source
AI summary
A shovel includes a lower traveling body, an upper turning body turnably mounted on the lower traveling body, an attachment including a boom and an arm, a boom cylinder configured to drive the boom, an arm cylinder configured to drive the arm, a hydraulic pump configured to supply hydraulic oil to the boom cylinder and the arm cylinder, an input device configured to receive an input from a user, and a control device configured to control the hydraulic pump. The boom is attached to the upper turning body, and the arm is attached to a tip of the boom. When a predetermined work mode for performing hoisting work involving use of the attachment is selected in response to the input received by the input device, the control device sets a standby flow rate of the hydraulic pump to be greater than when the predetermined work mode is not selected.