Spring-Loaded Cableway Support Cable Contact for Stable Potential Equalization
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Solution Overview
Problem
Existing systems for electrical potential equalization of cable car suspension cables face challenges, particularly with moving haulage ropes, where wear and loss of contact due to lateral deflections compromise equipotential bonding.
Innovation Solution
A guide part with a plastic insert and an electrically conductive contact element, which is spring-loaded and movably arranged within an insert recess, ensures reliable electrical contact and potential equalization even during slight movements of the suspension cable.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a contact element is pressed against the rope with a spring to establish secure electrical contact, then electrical contact reliability is improved, but wear on the contact element increases significantly
Solution Approach 1:
The contact element is made movable within the insert recess instead of being fixed, allowing it to dynamically adjust its position. This dynamic arrangement reduces wear by accommodating cable movements without requiring constant spring pressure, while still maintaining reliable electrical contact through the spring element's pressing force.
Solution Approach 2:
The plastic insert with its recess acts as an intermediary structure that houses the contact element. This intermediary allows the contact element to move independently within the recess while remaining pressed against the cable, separating the functions of electrical contact and mechanical constraint.
2Reliability
If spring preload is applied to the contact element to improve electrical contact, then contact stability is improved, but the system becomes sensitive to lateral deflections caused by external influences
Solution Approach 1:
The contact element's movable arrangement within the insert recess allows it to adapt dynamically to lateral deflections. When the cable deflects laterally, the contact element can shift position within the recess while maintaining contact, preventing loss of electrical connection despite spring preload.
Solution Approach 2:
The insert recess provides a pre-configured space that accommodates potential lateral movements of the cable. This beforehand cushioning allows the system to absorb lateral deflections without compromising electrical contact, as the contact element can move within the recess boundaries.
3Duration of action of stationary object
If the suspension cable is embedded in a plastic insert to reduce mechanical stress and wear, then mechanical durability is improved, but electrical potential equalization is lost
Solution Approach 1:
The electrically conductive contact element acts as an intermediary that bridges the electrical connection through the plastic insert. The contact element is pressed against the cable within the insert recess, providing the electrical path while the plastic insert continues to provide mechanical support and wear reduction.
Solution Approach 2:
The system combines electrically conductive material (contact element) with electrically insulating material (plastic insert). This composite arrangement allows the plastic insert to provide mechanical durability while the conductive contact element ensures electrical potential equalization.
4Loss of substance
If relative movement between the contact element and moving haulage rope is minimized, then wear is reduced, but achieving reliable electrical contact becomes more difficult
Solution Approach 1:
The contact element is designed to move within the insert recess to follow the cable's movement. This dynamic adjustment minimizes relative movement and wear while maintaining continuous electrical contact, as the contact element can shift position without losing connection.
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 maintains electrical equipotential bonding during normal and expected movements of the suspension cable, minimizing wear on the contact element and ensuring safety and reliability.
Implementation Method 1
a spring element is also provided which presses the electrically conductive contact element against the support cable
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
In order to enable a more reliable electrical potential equalization of a supporting cable (4) of a cable car (1), which does not lose its effectiveness even in the event of possible slight movements of the supporting cable (4), it is provided that an insert recess (14) is provided on the plastic insert (11) of a guide part (6) for the supporting cable (4), through which insert recess an electrically conductive contact element (15) is pushed and the contact element (15) is movably arranged in the insert recess (14), wherein a spring element (20) is provided which presses the electrically conductive contact element (15) against the supporting cable (4) so that the electrically conductive contact element (15) contacts the supporting cable (4) guided on the plastic insert (11) with a contact surface (16), and wherein the electrically conductive contact element (15) is electrically connected to a potential equalization point (17) of the cable car (1).