Sliding Block Hard Surface Inserts for Torsional Damper Wear
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Solution Overview
Problem
Existing torsional vibration dampers experience high wear on sliding blocks, leading to lubricant contamination due to friction, which compromises their effectiveness in reducing torsional vibrations in internal combustion engines.
Innovation Solution
A sliding block design with a harder first surface section for radial and axial support, potentially coated or reinforced with metal inserts, to reduce wear and abrasion, and a method for producing such sliding blocks using fiber-reinforced plastic with embedded harder inserts or coatings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If sliding blocks are used in torsional vibration dampers, then spring elements can be supported and connected, but high wear and abrasion occur on the sliding surfaces
Solution Approach 1:
The sliding block is designed with different surface properties in different regions. The first surface section that contacts the spring element has enhanced hardness through metal inserts or coatings, while other sections maintain the base plastic material properties. This local differentiation reduces wear at the critical contact zone without compromising overall functionality.
Solution Approach 2:
The sliding block combines plastic base material with harder metal inserts or coatings on the first surface section. This composite structure provides both the flexibility and self-lubricating properties of plastic and the wear resistance of metal, resolving the contradiction between support reliability and wear prevention.
2Object-generated harmful factors
If sliding blocks are hardened to reduce wear, then abrasion decreases, but manufacturing complexity increases
Solution Approach 1:
Instead of hardening the entire sliding block, only the first surface section contacting the spring element is hardened through inserts or coatings. This localized approach reduces abrasion where needed while keeping the manufacturing process simpler than complete hardening would require.
Solution Approach 2:
The sliding block combines plastic base material with harder metal inserts or coatings on the first surface section. This composite structure provides both the flexibility and self-lubricating properties of plastic and the wear resistance of metal, resolving the contradiction between support reliability and wear prevention.
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 design significantly reduces wear on the sliding blocks, minimizing lubricant contamination and maintaining effective vibration damping, while simplifying production and ensuring reliable support of spring elements at various rotational speeds.
Implementation Method 1
Since such friction between the sliding block and the wall causes increased wear on the sliding block, while the abrasion which occurs leads to a contamination of the lubricant
Implementation Method 2
a sliding block design with a harder first surface section for radial and axial support, potentially coated or reinforced with metal inserts
Data Source
AI summary
A torsional vibration damper includes at least one spring element and a sliding block. The sliding block includes a first surface section that operatively faces an adjacent spring element, is harder than another surface section of the sliding block, has first and/or second supporting surfaces for radial support of the spring element, and has first and/or second supporting surfaces for axial support of the spring element. A second surface section has a sliding surface for sliding support of the sliding block, and a basic body includes plastic. The first and/or second surface section(s) is/are formed by at least one first insert that is harder than the plastic. The first surface section is formed by at least two elongate second inserts that are spaced apart from one another and projected and on which the spring element can be supported in a centering manner in a radial direction.