Elevator Traction Measuring Device for Space-Constrained Testing
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Solution Overview
Problem
Existing systems for testing the traction ability of traction sheave elevator systems are cumbersome and require significant installation space, limiting their independence and efficiency.
Innovation Solution
A measuring device that can be attached to the traction sheave elevator system, featuring a fastening device for positioning on multiple carrying cables, a force transmission device to proportionally load one cable onto others, and a measuring device using various principles such as spring deflection or load cells to determine traction capacity, allowing for a reproducible and automated assessment of traction limits without modifying the existing system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If existing systems for testing traction ability are used, then traction capacity can be determined, but the systems require significant installation space and are cumbersome
Solution Approach 1:
The measuring device is divided into separate functional modules: a fastening device for positioning on cables, a force transmission device for applying load, and a measuring device for detecting traction. This segmentation allows each component to be optimized independently and reduces the overall space requirement compared to integrated systems.
Solution Approach 2:
The patent introduces an intermediary force transmission device that transfers the load from the measuring device onto the carrying cables. This intermediary mechanism enables traction measurement without requiring direct attachment to the entire elevator system, significantly reducing the installation space needed.
2Measurement precision
If existing testing systems are used, then traction ability can be assessed, but the systems require significant effort for installation and modification
Solution Approach 1:
The measuring device is designed with universal fastening mechanisms that can be attached to various carrying cables without modifying the elevator system. The force transmission device can be configured to work with different cable arrangements, making the system adaptable to multiple elevator configurations without requiring system modifications.
Solution Approach 2:
The fastening device incorporates self-aligning and self-securing mechanisms that automatically position themselves on the carrying cables during installation. This self-service capability eliminates the need for complex alignment procedures and reduces installation effort significantly.
3Ease of manufacture
If a measuring device is attached to the traction sheave elevator system, then traction measurement can be performed without dismantling or modifying the system, but the device must be securely positioned on multiple carrying cables
Solution Approach 1:
The fastening device combines multiple positioning functions into a single integrated mechanism that simultaneously secures the measuring device to multiple carrying cables. This merging of functions reduces the overall complexity compared to separate positioning mechanisms for each cable.
Solution Approach 2:
The force transmission device is designed to distribute load evenly across multiple carrying cables, ensuring that the measuring device experiences the same force conditions regardless of which specific cables are used for attachment. This equipotentiality simplifies the positioning requirements and reduces measurement variability.
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
Enables a safe, repeatable, and traceable measurement of traction capacity, allowing for universal application across different elevator systems without dismantling or modifying them, providing evidence of sufficient traction and facilitating efficient evaluation of the connection between suspension cables and the traction sheave.
Implementation Method 1
a force transmission device, by means of which at least a proportionate load of a total load on at least one carrying cable to be tested can be transferred to one or more neighboring carrying cables
Implementation Method 2
Measurement of the spring deflection of a mechanical compression or tension spring element
Implementation Method 3
measurement using a load cell
Implementation Method 4
measurement using a strain gauge
Data Source
Figure 1~2
Figure 3~5
Figure 6~7
AI summary
The measuring device (1) has a mounting device (4) for positioning multiple catenary wires (3). A fixing device for one of the catenary wire (2). A power transmission device (9) by which a proportionate load of a whole load is transferred to tested catenary wire (2) from one or more adjacent catenary wires (3). An independent claim is also included for the method for measurement of power transmission of catenary wire of traction sheave elevator system.