Foil Bearing Bore Coating on Aluminum Support for Heat and Wear
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Solution Overview
Problem
Conventional film bearings with steel bearing sleeves are costly to manufacture due to complex machining, heavy, and have poor thermal conductivity, making heat dissipation difficult.
Innovation Solution
A foil bearing with a bearing holder made of aluminum or aluminum alloy, coated with a titanium nitrite hard material layer for wear resistance, allowing for integrated design within a compressor housing and improved thermal conductivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a steel bearing sleeve is used, then wear resistance is improved, but weight increases and thermal conductivity deteriorates
Solution Approach 1:
The patent applies composite materials by combining aluminum (lightweight, good thermal conductivity) with a titanium nitride coating (high wear resistance). This creates a composite bearing support that achieves both low weight and high wear resistance, resolving the contradiction between wear resistance and weight.
2Reliability
If a steel bearing sleeve is used, then wear resistance is improved, but thermal conductivity deteriorates
Solution Approach 1:
The aluminum-based composite material provides excellent thermal conductivity for heat dissipation while the titanium nitride coating layer provides wear resistance. This composite structure resolves the contradiction between wear resistance and thermal conductivity.
3Reliability
If a steel bearing sleeve is used, then wear resistance is improved, but manufacturing complexity and cost increase
Solution Approach 1:
The patent uses aluminum as the base material which is easier to machine than steel, and applies a titanium nitride coating to provide the required wear resistance. This composite approach reduces manufacturing complexity and cost while maintaining wear resistance.
4Weight of stationary object
If aluminum is used for the bearing support, then weight decreases and thermal conductivity improves, but wear resistance deteriorates
Solution Approach 1:
The patent combines aluminum (lightweight) with a titanium nitride coating (wear-resistant) to create a composite bearing support. The aluminum provides low weight and good thermal conductivity, while the coating provides the necessary wear resistance, thus resolving the contradiction between weight and wear resistance.
5Temperature
If aluminum is used for the bearing support, then thermal conductivity improves, but wear resistance deteriorates
Solution Approach 1:
The aluminum base material provides excellent thermal conductivity for heat dissipation, while the titanium nitride coating layer provides high wear resistance. This composite structure resolves the contradiction between thermal conductivity and wear resistance.
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 results in a lightweight, cost-effective foil bearing with enhanced heat dissipation and wear resistance, eliminating the need for a separate bearing sleeve and improving thermal management.
Implementation Method 1
the surface of the bearing bore (14) is provided with a hard material coating (26)... the hard material layer (26) is formed from titanium nitride
Implementation Method 2
The bearing support (12) is made of aluminum or an aluminum alloy... good thermal conductivity, so that the foil bearing can be manufactured cost-effectively
Data Source
Figure 1~2
Figure 3
AI summary
The invention relates to a foil bearing (10) having at least one foil (16, 18) which is arranged and fixed in place inside a bearing bore (14) of a bearing support (12). The bearing support (12) is made of aluminum or an aluminum alloy, wherein the surface of the bearing bore (14) is provided at least in one contact region (20) of the at least one foil (16, 18) with a hard material layer (26). The bearing support (12) can be produced in a simple and cost-effective manner, has a low weight and a good thermal conductivity.