Composite Rope Pulley Insert Ring Friction and Wear
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Solution Overview
Problem
Existing rope pulley insert rings face challenges in balancing sound and vibration damping, friction optimization, and wear resistance while maintaining durability and comfort, leading to high maintenance costs and operational inefficiencies due to wear and tear, especially under high loads and varying temperatures.
Innovation Solution
A composite material is used for the rope pulley insert ring, comprising an elastic carrier material like rubber or silicone rubber combined with hard, non-elastic composite elements such as metals or ceramics, arranged in a V-shaped running groove to minimize friction and wear, and embedded in the carrier material to ensure effective damping and reduced contact surfaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If rope pulley insert rings are made from elastomer or rubber to provide comfort, noise and vibration damping, then damping performance is improved, but friction losses and wear increase
Solution Approach 1:
The patent applies composite materials by combining elastomer or rubber with PTFE (polytetrafluoroethylene) coating or embedded PTFE elements. The elastomer base provides noise and vibration damping, while the PTFE component reduces friction losses. This composite structure resolves the contradiction by integrating two materials with complementary properties: the viscoelastic elastomer absorbs vibrations and dampens noise, while the low-friction PTFE surface minimizes energy loss through friction.
Solution Approach 2:
The patent changes the surface parameters of the elastomer material by applying PTFE coating or embedding PTFE elements. This modifies the surface friction characteristics without altering the bulk damping properties of the elastomer. The PTFE layer transforms the high-friction elastomer surface into a low-friction interface, thereby reducing energy losses while preserving the underlying material's vibration and noise damping capabilities.
2Object-affected harmful factors
If rope pulley insert rings are made from elastomer or rubber to provide comfort and damping, then damping performance is improved, but wear and tear increases leading to high maintenance costs
Solution Approach 1:
The patent uses a composite structure where elastomer provides damping and PTFE provides wear resistance. The PTFE coating or embedded elements create a protective low-friction layer that reduces wear on the elastomer, thereby extending service life and reducing maintenance costs while preserving the damping performance of the elastomer base material.
Solution Approach 2:
The PTFE coating or embedded PTFE elements act as a sacrificial protective layer that wears instead of the expensive elastomer insert ring. This allows the use of a softer, more damping-effective elastomer material while the durable PTFE layer protects it from wear, reducing the frequency of replacements and maintenance costs.
3Reliability
If rope pulley insert rings are made from polyurethane to increase wear resistance, then wear resistance is improved, but impact and vibration damping performance decreases
Solution Approach 1:
The patent creates a composite structure where the elastomer base provides impact and vibration damping, while the PTFE coating or embedded elements provide wear resistance. This resolves the contradiction by separating the damping function (handled by the viscoelastic elastomer) from the wear resistance function (handled by the low-friction PTFE layer), allowing both properties to coexist in a single insert ring component.
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 significantly reduces friction and wear, extends the service life of the pulley insert rings, decreases maintenance costs, and allows for higher load capacities and reduced temperature fluctuations, resulting in improved operational efficiency and sustainability.
Implementation Method 1
an elastomer in the form of rubber, the vulcanizates of natural or silicone rubber or in the form of elastic plastics
Implementation Method 2
comfort, noise, impact and vibration damping
Implementation Method 3
The friction between the rope and the rope pulley insert ring is significantly reduced
Data Source
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AI summary
The invention relates to a pulley insert ring (100) for insertion into a pulley of a cableway system with a rope (200) having at least one strand (7) made of a strand outer material (7), wherein the pulley insert ring (100) has a ring body (1) with an outer diameter (AD) and a receptacle arranged centrally in the ring body (1) with an inner diameter (ID), and wherein the ring body (1) forms a lateral surface (2) on which a running groove (4) for receiving and guiding the rope (200) is arranged between edge shoulders (3a, 3b), wherein the pulley insert ring (100) comprises a composite material, with a first component in the form of an elastic support material (1) having a Shore hardness A + D in a range of 20 to 110, which is preferably approximately 65.and at least a second component in the form of composite elements (5) each with a contact surface (6) to the rope (200) and wherein the composite elements (5) consist of a solid, inelastic material, with a Mohs hardness in the range of 2.5 to 10, which is preferably approximately 8, and with a coefficient of adhesion friction (µ1, µ2) to the strand outer material (7) in the range of 0.02 to 0.6, which is preferably approximately 0.2.