Friction-Increasing Coating for Corrosion-Protected Machine Joints
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Solution Overview
Problem
Existing methods for achieving high frictional connections between machine parts, particularly in high-load applications like wind turbine bearings, face challenges in maintaining mechanical stability and corrosion protection without complex surface preparation or risk of abrasive contamination.
Innovation Solution
A friction-increasing paint containing a binder and hard material particles, such as titanium-boron compounds, is applied to the contact surfaces, which are then pressed together to form form-fitting micro-connections, achieving a high coefficient of friction while providing corrosion protection without the need for surface blasting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If high contact pressure is used to achieve high frictional force, then the frictional force increases, but the tensile strength requirements of connecting means and pressure strength requirements of machine parts become increasingly difficult to meet
Solution Approach 1:
The invention changes the parameter of the contact surfaces by applying a coating that increases the coefficient of friction. This allows achieving high frictional force not through high contact pressure alone, but through the combination of moderate contact pressure and high coefficient of friction provided by the coating, thereby reducing the strength requirements of connecting means and machine parts.
Solution Approach 2:
The invention uses a composite coating material consisting of a binder and hard material particles (such as titanium diboride, aluminum oxide, or silicon carbide). This composite structure provides both the friction-increasing effect and the necessary mechanical properties, allowing the contact surfaces to withstand the required loads while maintaining high frictional force.
2Reliability
If surface blasting is performed to prepare contact surfaces, then the coating adhesion improves, but the risk of abrasive particle contamination increases and the process complexity increases
Solution Approach 1:
The invention uses a coating formulation that provides sufficient adhesion to lightly prepared surfaces without requiring expensive and time-consuming surface blasting. The coating acts as a disposable protective layer that achieves reliable bonding with minimal surface preparation, eliminating the need for aggressive abrasive blasting that would cause contamination.
Solution Approach 2:
The invention performs preliminary surface preparation by applying a primer or treating the surface with a mild method before coating application. This preliminary action creates sufficient surface energy for coating adhesion without requiring full surface blasting, thereby reducing the risk of abrasive particle contamination while maintaining reliable coating bonding.
3Force
If a friction-increasing coating is applied to contact surfaces, then the coefficient of friction increases, but the corrosion protection of the contact surfaces must be maintained
Solution Approach 1:
The invention uses a composite coating material that combines friction-increasing hard particles with a corrosion-protective binder matrix. The binder (such as epoxy resin, polyester resin, or zinc-rich primer) provides the corrosion protection function, while the hard material particles (such as titanium diboride, aluminum oxide, or silicon carbide) provide the friction-increasing function. This composite structure allows both functions to coexist without compromising either.
Solution Approach 2:
The invention merges two separate functions (friction increase and corrosion protection) into a single integrated coating layer. Instead of applying separate coatings for each function, the invention combines both functionalities in one coating application, simplifying the process while ensuring both friction increase and corrosion protection are achieved simultaneously.
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 increases the coefficient of friction and provides corrosion protection, ensuring mechanical stability and preventing abrasive contamination, while being cost-effective and easy to apply, even on non-blasted surfaces.
Implementation Method 1
The amount of frictional force depends on the contact pressure and the coefficient of friction of the contact surfaces
Implementation Method 2
The first contact surface or the second contact surface is coated with a friction-increasing paint containing a binder and hard material particles
Data Source
Figure 1
AI summary
The invention relates to a friction-increasing paint, which contains a binding agent (9) and hard material particles (6) as components, wherein the hard material particles (6) comprise a titanium-boron compound or consist of a titanium-boron compound.