Winch System Axial Drum Tension Control
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Solution Overview
Problem
Conventional winch systems for rotary-wing aircraft, such as helicopters, face challenges in ensuring safety, minimizing energy consumption, and reducing weight and complexity, particularly due to potential malfunctions, jamming, and limited space.
Innovation Solution
A winch system comprising a storage subsystem and a traction subsystem with interconnected drums, where the storage drum is axially movable via a diamond screw, maintaining constant tension in the connecting rope or cable portion, and utilizing a single drive motor with a control system to optimize winding and unwinding, and a torque limiter to prevent overload, thereby reducing energy consumption and weight.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single drum is used for storing and delivering the rope, then the device complexity is reduced, but the reliability decreases due to potential malfunctions and jamming
Solution Approach 1:
The winch system is divided into two separate drums: a storage drum for storing and delivering the rope, and a traction drum for extending and retracting the rope. This segmentation allows each drum to perform its specific function independently, reducing the risk of malfunction and jamming while maintaining system reliability.
2Reliability
If separate drums are used for storage and traction, then the reliability improves, but the device complexity increases
Solution Approach 1:
The storage drum and traction drum are integrated into a single winch system with a unified control mechanism. The storage drum and traction drum work together through a coordinated system, where the storage drum stores and delivers the rope while the traction drum extends and retracts it, achieving both functions within a single integrated unit.
3Reliability
If the storage drum is made axially moveable via diamond screw, then the tension control is improved, but the device complexity increases
Solution Approach 1:
The storage drum is designed with axial movability through a diamond screw mechanism, allowing it to adjust its position dynamically. This dynamic adjustment enables precise control of the rope tension by moving the storage drum axially, ensuring reliable tension control while adapting to varying operational conditions.
4Reliability
If constant tension is maintained in the connecting rope portion, then the reliability improves by preventing blocking and jamming, but the energy consumption increases
Solution Approach 1:
The winch system incorporates a feedback mechanism that monitors the tension in the connecting rope portion and adjusts the drum operation accordingly. This feedback control maintains constant tension by detecting variations and making real-time adjustments, preventing blocking and jamming while optimizing energy consumption through efficient tension management.
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 solution provides a safe, reliable, and compact winch system with reduced energy consumption and weight, preventing blocking and jamming, while maintaining constant tension, thus enhancing operational safety and efficiency.
Implementation Method 1
The storage drum (11) is axially moveable by means of a diamond screw (11b) in operation
Data Source
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AI summary
The invention is related to a winch system 3 with a traction subsystem 6 that comprises a traction drum 18 for extending or retracting an external load mass rope or cable 3b in operation, and a storage subsystem 5 that comprises a storage drum 11 for storing said external load mass rope or cable 3b that is fed in operation from said traction drum 18 or for delivering said external load mass rope or cable 3b in operation to said traction drum, wherein said storage drum 11 and said traction drum 18 are interconnected by means of a connecting portion 11d of said external load mass rope or cable 3b, and wherein said traction drum 18 and said storage drum 11 are adapted to be driven in operation such that a current rope or cable tension of said connecting portion 11 d is comprised in a predetermined interval of tension values.