Scroll Compressor Thrust Plate Peeling Prevention
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Solution Overview
Problem
In scroll compressors, the peeling of fluororesin coatings on thrust plates due to repetitive thrust loads leads to uneven adhesion and reduced durability, causing lubrication failures over time.
Innovation Solution
A peeling prevention part is introduced on the thrust plate edge, reducing sliding pressure through a slide prohibited area, flexible area, or curved beveled edge, which absorbs or redirects the sliding pressure, preventing peeling and allowing for a thinner, more uniform coating layer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a fluororesin coating is applied to the thrust plate to improve lubrication, then lubrication performance is improved, but coating peeling occurs at corner portions due to poor adhesion and repetitive thrust loads
Solution Approach 1:
The thrust plate is segmented into a sliding portion and a non-sliding portion, where the coating is applied only to the sliding portion. This segmentation prevents coating peeling by avoiding application to corner portions that experience poor adhesion and high stress concentration from repetitive thrust loads.
Solution Approach 2:
The coating is applied selectively only to the sliding portion of the thrust plate where lubrication is actually needed, rather than covering the entire surface. This local quality approach ensures coating adhesion is maintained in critical areas while avoiding problematic corner portions.
2Strength
If the coating layer is made thicker to prevent separation, then adhesion is improved, but the coating becomes too thick and may cause other issues
Solution Approach 1:
By segmenting the thrust plate into sliding and non-sliding portions, the invention allows the coating to be applied only where needed with controlled thickness, avoiding the need to increase overall coating thickness to compensate for poor adhesion at corner portions.
3Weight of moving object
If the thrust plate edge portion is designed to be thin to reduce weight, then weight is reduced, but coating formation becomes difficult and peeling occurs
Solution Approach 1:
The thrust plate is divided into a sliding portion with thin design for weight reduction and a non-sliding portion where coating is not applied. This segmentation allows the thin edge portions to maintain structural integrity without requiring uniform coating formation across the entire surface.
Solution Approach 2:
The coating is applied only to the sliding portion where it is functionally required, allowing the thin edge portions and corner areas to remain uncoated, thus avoiding coating formation difficulties while maintaining necessary 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 solution effectively prevents peeling of the coating layer, maintaining lubrication over a long period and enhancing the reliability and durability of the scroll compressor by reducing sliding pressure on the thrust plate edges.
Implementation Method 1
a peeling prevention part which reduces a sliding pressure acting on a thrust plate edge portion from the slide face
Implementation Method 2
a coating which is applied to a surface of the thrust plate... a coating layer 51b of fluororesin or the like is formed on the surface... with the aim of improving lubrication
Data Source
AI summary
There is provided a scroll compressor in which reliability and durability is increased by preventing peeling of a coating layer applied to a thrust plate, to maintain a desired level of lubrication for a long period of time. The scroll compressor has a thrust plate, a coating which is applied to a surface of the thrust plate, a housing having a thrust bearing face to which the thrust plate is attached, an orbiting scroll member having a slide face which is supported by the thrust plate and which orbits while sliding, and a peeling prevention part which reduces a sliding pressure acting on an edge portion of the thrust plate from the slide face.