Load Equalizing Rope Termination Fitting
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Solution Overview
Problem
Load imbalances in redundant rope systems can cause uneven displacement and operational issues, particularly when high-stiffness ropes are used, leading to increased friction, wear, and energy losses.
Innovation Solution
A load equalizing rope termination system featuring a base support member and upstream load equalizing support members angled opposite to the load direction, which prevents rope slipping and ensures independent load support, maintaining redundancy in case of rope failure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a pair of ropes with respective rope ends is secured between the drum and the object to be lifted to provide redundancy, then reliability is improved, but load imbalance occurs causing the object to be skewed or unevenly displaced
Solution Approach 1:
A rope termination fitting with load equalizing support members is introduced as an intermediary device between the rope ends and the object. The support members receive and distribute the load from the rope ends, preventing direct transmission of imbalanced forces to the object, thereby maintaining both redundancy and load balance
2Strength
If high-stiffness ropes are used in the lifting system, then strength is improved, but friction and wear increase leading to energy losses
Solution Approach 1:
The rope termination fitting acts as a mediator that reduces friction and wear between the high-stiffness ropes and the object. By distributing loads through multiple support members, the fitting minimizes concentrated contact forces, thereby reducing friction and energy losses while allowing the use of strong, stiff ropes
3Device complexity
If rope ends are directly secured to the object without load equalizing support members, then device complexity is reduced, but load imbalance prevents proper operation
Solution Approach 1:
The rope termination fitting is designed as a relatively simple intermediary component that ensures proper operation by preventing load imbalance. While it adds some complexity, the fitting's straightforward structure with base and support members provides a practical solution that maintains ease of operation through reliable load distribution
Data Source
Figure 1
Figure 2~3
AI summary
A load equalizing rope termination serves to prevent a load imbalance between a pair of rope leads of a rope termination. The rope termination includes an end section such as an end loop and the pair of rope leads attached to a pair of rope ends. A rope termination fitting includes a base support member over which the end section is supported, and a pair of load equalizing support members disposed upstream of the base support member and over which the rope ends are supported. The engagement between the rope ends and the equalizing support members prevents a load imbalance of the rope leads.