Elastic Spacer Guide Roller for Cable Stability
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Solution Overview
Problem
Existing spacer devices in cable transportation systems fail to prevent the pull cable from straddling the supporting cable, especially under strong crosswinds, due to inadequate support and oscillation damping, leading to instability in long-span cable configurations.
Innovation Solution
A spacer device with a frame, couplings, and guide rollers, where the top guide roller is elastically supported to press onto the pull cable and features a shock-absorber between the guide roller and the frame, ensuring stable engagement and damping of oscillations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the pull cable is guided by fixed guide rollers, then the cable path is stable, but the pull cable may straddle the supporting cable during crosswind conditions
Solution Approach 1:
The guide roller is made movable relative to the frame along the pull cable direction, allowing it to dynamically adjust its position. This dynamic capability enables the guide roller to maintain proper engagement with the pull cable while preventing straddling of the supporting cable during crosswind conditions, resolving the contradiction between path stability and prevention of harmful straddling.
Solution Approach 2:
The guide roller's position parameter along the pull cable is made variable rather than fixed. By changing the position parameter dynamically in response to wind forces and cable tension, the system maintains stable cable guidance while preventing the pull cable from straddling the supporting cable.
2Device complexity
If the guide roller is rigidly fixed to the frame, then the structure is simple, but vertical oscillations of the pull cable cannot be damped
Solution Approach 1:
The guide roller support structure incorporates local flexibility at the critical interface between the guide roller and the pull cable. The elastic support provides localized compliance that dampens vertical oscillations, while the overall frame structure remains relatively simple, resolving the contradiction between structural simplicity and oscillation damping capability.
Solution Approach 2:
The elastic support element is pre-installed to provide cushioning before oscillations occur. This beforehand cushioning capability allows the system to absorb and damp vertical oscillations of the pull cable, preventing them from propagating or causing straddling, while adding minimal complexity to the overall structure.
3Volume of moving object
If the distance between the running roller and clamp is reduced, then the transportation unit is more compact, but the pull cable is more prone to extraction from the groove
Solution Approach 1:
The guide roller's dynamic positioning capability allows it to compensate for the reduced distance between the running roller and clamp. By adjusting its position along the pull cable, the guide roller maintains reliable engagement even when the transportation unit is more compact, resolving the contradiction between compactness and engagement reliability.
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 prevents the pull cable from straddling the supporting cable, reducing vertical oscillations and enhancing stability during crosswind conditions, thereby ensuring reliable operation in cable transportation systems with long spans.
Implementation Method 1
by comprising a shock-absorber located between the second guide roller and the frame
Implementation Method 2
the second guide roller is supported elastically by the frame, so as to be pressed onto the pull cable and the first guide roller
Data Source
Figure 1~3
Figure 4~5
Figure 6~7
AI summary
A spacer device (4; 39), for a cable transportation system (1; 35) having at least one supporting cable (2; 36) and a pull cable (3; 37), has a frame (6; 41); couplings (7, 8; 44) connected to the frame (6; 41) and fixed to the supporting cable (2; 36); a first guide roller (9; 45) which supported in rotary manner by the frame (6; 41), is located beneath the pull cable (3; 37), and has a first groove (23; 57) engaged by the pull cable (3; 37); and a second guide roller (10; 46) which is located on top of the pull cable (3; 37), has a second groove (25; 59) engaged by the pull cable (3; 37), and is supported elastically by the frame (6; 41), so as to be pressed onto the pull cable (3; 37) and the first guide roller (9; 45).