Elevator Sheave Liner Geometry for Anti-Slip Groove Mounting
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Solution Overview
Problem
Elevator sheave liners in existing systems require improvements in structure, performance, installation, replacement, and maintenance, as well as higher manufacturing costs.
Innovation Solution
The elevator sheave liner is designed with specific angles and gaps to enhance friction and prevent slipping, featuring a first section with an angle not exceeding arctan(μ1) and a second section with an angle greater than or equal to arctan(μ1), along with optional planar or arched surfaces, to ensure stable mounting and reduce wear.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the elevator sheave liner uses a traditional structure without specific angle design, then the structure is simple, but the liner slips and loosens during operation, reducing reliability
Solution Approach 1:
The patent applies local quality by designing different sections of the liner with different angles relative to the longitudinal centerline. The first section has an angle not greater than arctan(μ1) to prevent slipping, while the second section has a different angle configuration. This localized variation in geometric properties optimizes friction and prevents loosening without requiring complete structural redesign.
Solution Approach 2:
The patent changes geometric parameters by specifying precise angular relationships between liner sections and the longitudinal centerline. The first angle (≤arctan(μ1)) and second angle (≥arctan(μ1)) are controlled parameters that directly affect the friction characteristics and anti-slip performance, transforming a simple liner into a performance-optimized component through parameter control.
2Reliability
If the elevator sheave liner is designed with optimized angles and gaps to prevent slipping, then reliability improves, but manufacturing precision requirements increase
Solution Approach 1:
The patent defines specific parameter ranges for the first angle (not greater than arctan(μ1)) and second angle (not less than the first angle) to achieve reliable mounting stability. These parameter specifications provide clear manufacturing targets while maintaining reliability through controlled geometric variations.
3Duration of action of stationary object
If the elevator sheave liner uses increased friction design, then wear between components is reduced, but the complexity of the liner structure increases
Solution Approach 1:
The patent applies local quality by creating different surface characteristics in different sections of the liner. The first section with angle ≤arctan(μ1) provides enhanced friction for wear prevention, while the second section with larger angle serves different functional requirements. This localized differentiation extends component lifespan without requiring complete structural complexity.
Solution Approach 2:
The patent segments the liner into multiple sections with distinct angular characteristics. The first section and second section are differentiated by their angles relative to the longitudinal centerline, allowing each segment to perform its specific function optimally while contributing to overall wear reduction and extended component life.
4Reliability
If the elevator sheave liner is designed with multiple sections and gaps, then performance improves, but installation and replacement time increases
Solution Approach 1:
The patent segments the liner into a first section, second section, and optional third section with specific gap configurations. This segmentation allows for improved operational stability through controlled friction and positioning, while the modular nature may facilitate standardized installation procedures despite the increased structural detail.
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 slipping and wear, improves safety, and reduces manufacturing and installation time, lowering overall costs while ensuring stable operation.
Implementation Method 1
a first angle is formed between the first section and a longitudinal centerline of the elevator sheave liner and the first angle is set to be not greater than arctan (μ1), wherein μ1 is a coefficient of friction between the elevator sheave liner and the groove
Data Source
AI summary
An elevator sheave liner, an elevator sheave assembly and an elevator system are disclosed. The elevator sheave liner is mounted in a groove of the elevator sheave and has a first end and a second end opposite to each other, the first end is provided with an engagement portion for engagement with an elevator tension member, and the elevator sheave liner includes a first section provided on at least one side of the elevator sheave liner and abutting against a surface of the groove after the elevator sheave liner is mounted in place, a first angle is formed between the first section and a longitudinal centerline of the elevator sheave liner and the first angle is set to be not greater than arctan (μ1), μ1 is a coefficient of friction between the elevator sheave liner and the groove.