Elevator Governor Core Ring Assembly for Stable Rope Tension
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
High-speed elevator governors face issues with excessive tensile force on ropes due to varying heights, leading to stricter requirements on rope design and potential harmful force outputs during braking, which existing technologies struggle to address effectively.
Innovation Solution
A core ring assembly with axially arranged portions and a pressure generation mechanism that utilizes friction between conical contact surfaces to stabilize the tensile force exerted on the rope, allowing for consistent friction force and reduced excessive force output during braking, thereby maintaining consistent tensile force regardless of the elevator's height.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a traditional governor is used in high-speed elevators, then the governor can activate safety mechanisms, but excessive tensile force is exerted on the rope due to varying car heights
Solution Approach 1:
The core ring is divided into first and second portions that can rotate relative to each other, with the first portion receiving actuation torque and the second portion enabling the safety activating module through friction-based rotation. This segmentation allows the system to decouple the torque transmission from the safety activation, reducing excessive force transmission to the rope while maintaining reliable safety activation.
2Reliability
If the governor is actuated at different car heights, then safety activation is achieved, but the tensile force on the rope varies significantly
Solution Approach 1:
The core ring assembly incorporates dynamic elements where the first and second portions can rotate relative to each other, with friction between contact surfaces enabling controlled rotation. This dynamic structure allows the system to maintain consistent friction force and stabilize the tensile force on the rope regardless of car height variations, while still achieving reliable safety activation.
3Reliability
If the rope must withstand varying tensile forces at different heights, then safety is maintained, but the requirements on rope design become stricter
Solution Approach 1:
The core ring assembly extracts and isolates the friction-based force stabilization mechanism from the rope system. By incorporating the friction mechanism within the core ring (between the first and second portions), the system stabilizes tensile force internally, reducing the burden on rope design requirements while maintaining safety.
4Reliability
If the governor activates the safety mechanism, then the elevator stops, but excessive harmful force is output to the safety activating module
Solution Approach 1:
The friction mechanism between the first and second portions of the core ring acts as a cushioning element before excessive force reaches the safety activating module. The friction force limits and stabilizes the torque transmission, preventing excessive harmful force from being transmitted to the safety activating module while still enabling reliable elevator stopping.
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 core ring assembly reduces the variability in tensile force on the rope, lowering the requirements for rope design and preventing excessive force outputs to the safety activating module, ensuring consistent performance across different building heights and elevator speeds.
Implementation Method 1
the second portion of the core ring rotates with the first portion of the core ring by virtue of friction of the contact surfaces
Data Source
AI summary
The present invention provides a core ring assembly for an elevator governor, a governor and an elevator system, wherein the core ring assembly comprises: a first portion and a second portion of a core ring which are axially arranged, the first portion and the second portion of the core ring having contact surfaces therebetween; and a pressure generation mechanism for generating a pressure between the first portion and the second portion of the core ring, wherein the first portion of the core ring rotates by receiving an actuation torque from an over-speed actuating mechanism, and the second portion of the core ring rotates with the first portion of the core ring by virtue of friction of the contact surfaces and enables a safety activating module. The core ring assembly provided by the embodiment of the present invention has a peak torque limiting function and a compact structure.