Floating Cable Guide Element for Drum Vibration Damping
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Solution Overview
Problem
Existing cable guide devices for drum conveyor systems in mining are complex, expensive, and require adjustments when changing cable layers, leading to vibrations that impair operational safety due to resonance with the natural frequency of the rope.
Innovation Solution
A cable guide device with a floating guide element and additional mass coupled radially to the rope, using guide rollers arranged without play to shift the natural frequency and prevent vibrations, eliminating the need for synchronization with the cable drum's rotation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a guide element with synchronous drive is used to dampen rope vibrations, then rope guidance and winding precision are improved, but device complexity and cost increase significantly
Solution Approach 1:
The patent extracts the synchronous drive mechanism from the guide element, eliminating the need for complex drives, chains, and control systems. The guide element is reduced to a simple floating structure with rollers that passively follow the rope's movement, thereby simplifying the device while maintaining its rope guidance function.
Solution Approach 2:
The guide element is designed to move autonomously without external power or control. It self-adjusts its position along the drum axis by floating on the rope tension and following the rope's natural path, eliminating the need for synchronous positioning mechanisms and reducing device complexity.
2Reliability
If a guide element with synchronous drive is used to prevent rope vibrations, then operational safety is improved, but adjustment work is required when changing cable layers
Solution Approach 1:
The guide element transitions from a fixed synchronous positioning system to a dynamic floating structure. It can freely move along the drum axis to adapt to different cable layers and winding positions automatically, eliminating the need for manual adjustment when changing cable layers while maintaining vibration dampening effectiveness.
3Object-affected harmful factors
If cable guide rollers are arranged to allow floating movement, then rope vibrations are dampened through mass coupling, but guidance precision may be compromised
Solution Approach 1:
The patent changes the mass parameter of the guide element by adding adjustable weights. This increases the inertial coupling between the guide element and the rope, enhancing vibration dampening effectiveness while the floating design maintains winding precision through passive following of the rope's natural path.
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 effectively dampens rope vibrations by aligning the guide element's mass with rope deflections, preventing resonance and ensuring safe, even winding without the need for complex synchronization or adjustments, making it simpler, robust, and adaptable to different operating conditions.
Implementation Method 1
a floating guide element and additional mass coupled radially to the rope, using guide rollers arranged without play to shift the natural frequency and prevent vibrations
Implementation Method 2
aligning the guide element's mass with rope deflections, preventing resonance and ensuring safe, even winding
Data Source
Figure 1a
Figure 1b~1c
Figure 2
AI summary
Cable-guiding device (11) for a cable winch having a cable drum (1), which can be rotated about an axis (9), for winding or unwinding a cable (4), wherein a guide element provided with a plurality of cable-guiding rollers (17a, b) can be moved parallel to the axis of the cable drum. This cable-guiding device is simple and robust in design, can be retrofitted to multi-layer cable winches, requires no adjustment work and nevertheless damps the vibrations in the cable. In the cable section situated in front of the cable drum, an additional mass is integrated in a play-free manner radially with respect to the cable in order to effectively suppress vibrations of the cable in the region of the natural frequency thereof. The integrated mass is formed by the mass of the floatingly guided guide element itself, with it being possible to change this mass, depending on the operating conditions, by means of additional weights which can be releaseably fastened to the guide element.