Dynamic Crane Counterweight Positioning for Stability
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Solution Overview
Problem
Current crane systems maximize counterweight extension for lifting capacity but lack flexibility to adjust position based on load changes, leading to potential instability and uneven ground pressure, which can compromise safety and increase wear.
Innovation Solution
A method and system that determine boom orientation and adjust counterweight position between maximum and minimum extension positions based on load percentage, using sensors and actuators to maintain optimal crane capacity and stability, ensuring safety and even ground pressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the counterweight is extended as far as possible to maximize lifting capacity, then the crane capacity is improved, but the crane stability deteriorates when the load changes or the crane needs to move
Solution Approach 1:
The counterweight position is made dynamic rather than fixed. The system automatically adjusts the counterweight position along the boom based on real-time load conditions, enabling the crane to maintain optimal stability while maximizing lifting capacity under varying operational conditions
Solution Approach 2:
The system implements a feedback control mechanism where load sensors continuously monitor the actual load, and the control system automatically adjusts the counterweight position in response to load changes. This closed-loop control ensures the crane maintains proper balance and stability while operating at maximum capacity
2Power
If the counterweight is positioned at maximum extension for maximum capacity, then the lifting capacity is improved, but the ground pressure distribution deteriorates causing uneven pressure and increased wear
Solution Approach 1:
The counterweight position is dynamically adjusted based on actual load conditions rather than maintained at maximum extension. This dynamic repositioning optimizes the weight distribution on the ground, ensuring even pressure distribution and reducing wear on specific ground contact points while maintaining maximum lifting capacity
3Power
If the counterweight position is fixed at maximum extension, then the lifting capacity is maximized, but the adaptability to different load conditions deteriorates
Solution Approach 1:
The system transforms the fixed counterweight position into a dynamic, adjustable position. The counterweight can be repositioned along the boom to adapt to different load conditions, maintaining maximum lifting capacity while providing versatility for various operational scenarios
Solution Approach 2:
The system changes the position parameter of the counterweight based on load conditions. By adjusting this key parameter, the crane adapts to different loading scenarios while maintaining optimal performance and maximum capacity utilization
Data Source
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AI summary
A system and method for positioning a movable crane counterweight (35) is disclosed. In the method, a boom (22) orientation is determined, a first counterweight position is determined, a first crane capacity at the first counterweight position is determined, a second counterweight position is determined corresponding to a second rearward stability associated with the boom orientation. A second crane capacity at the second counterweight position. A load on the crane is determined and the counterweight is positioned at a third position between the first counterweight position and the second counterweight position dependent on the boom load, and the first crane capacity.