Composite Sliding Layer for Torsional Coupling Friction
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Solution Overview
Problem
Conventional sliding bolts and bearings often fail to provide optimal sliding properties on their outer surfaces, particularly in applications where traditional bearing solutions are not feasible, such as in torsion plug-in couplings, leading to increased friction and potential detachment under load.
Innovation Solution
A sliding bolt design featuring a composite sliding layer embedded in a resin, incorporating polyester fibers or PTFE, with optional solid lubricants like graphite, applied around a core to enhance adhesion and reduce friction, and potentially including an intermediate layer for improved mechanical properties and stability, along with conductive inserts for electrical connectivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional sliding bolt or bearing is used, then the structure is simple and easy to manufacture, but the sliding properties on the outer surface are insufficient leading to increased friction
Solution Approach 1:
The patent applies composite materials by embedding polyester fibers and solid lubricants (PTFE, graphite) in a resin matrix to form a sliding layer on the outer surface of the sliding bolt. This composite structure combines the strength of fibers, the lubrication properties of solid lubricants, and the binding capability of resin, achieving low friction and high reliability without excessive structural complexity.
Solution Approach 2:
The patent implements local quality by applying the composite sliding layer only on the outer surface of the sliding bolt where friction occurs, while the core remains as a separate material. This allows the sliding surface to have optimized lubrication properties without changing the entire bolt structure, maintaining manufacturing simplicity while improving sliding performance.
2Reliability
If a sliding layer is applied to reduce friction, then friction is reduced, but the sliding layer may detach under torsional loads
Solution Approach 1:
The composite material structure with fibers embedded in resin provides both friction reduction and attachment strength. The polyester fibers reinforce the sliding layer to prevent detachment, while solid lubricants reduce friction. This dual-function composite material simultaneously addresses both requirements.
Solution Approach 2:
The patent changes the physical and chemical parameters of the sliding layer by selecting specific materials with appropriate properties: polyester fibers for tensile strength, PTFE/graphite for low friction coefficient, and resin for adhesion. These parameter selections ensure the sliding layer remains attached under torsional loads while maintaining low friction.
3Reliability
If solid lubricants are embedded in the sliding layer, then friction is reduced, but the manufacturing process becomes more complex
Solution Approach 1:
The solid lubricants (PTFE, graphite) are pre-mixed with polyester fibers and resin to form a ready-to-apply composite sliding layer material. This preliminary preparation allows the sliding layer to be manufactured as an integrated component rather than applying lubricants separately, simplifying the overall manufacturing process while ensuring consistent lubrication performance.
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 composite sliding layer provides reduced friction and increased stability, preventing detachment under torsional loads, while the conductive elements enable electrical connections, extending the service life of plug-in couplings by minimizing heat generation and maintaining low friction.
Implementation Method 1
a fiber composite material is always combined with a solid lubricant such as PTFE or graphite
Implementation Method 2
PTFE, which are embedded in the resin, are preferably provided in the sliding layer
Implementation Method 3
the sliding layer is designed as a composite sliding layer and embedded in a resin
Implementation Method 4
Provision is made for the core to be roughened before it is wound with a fiber material of a fiber composite material in order to increase adhesion between the core and the overlay
Data Source
Figure 1~2
Figure 3~4
Figure 5
AI summary
The invention relates to a sliding bolt having a core (4) to which a sliding layer (6) is applied, which is designed as a composite sliding layer containing a resin.