Segmented Shrink Belts for Scroll Compressor Fixed Scroll Deformation
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Solution Overview
Problem
The adjustment of the shrink belt location in scroll compressors to accommodate additional fluid passages leads to increased deformation of the fixed scroll, reducing performance and reliability, and existing solutions to strengthen or enlarge the scroll compressor are costly or impractical.
Innovation Solution
The implementation of at least two annular shrink belts, a main and an assistant shrink belt, around the outer periphery of the fixed scroll, with the assistant belt located above or below the main belt, forming an annular space that can communicate externally, to maintain sealing and reduce deformation without increasing manufacturing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the location of the shrink belt is adjusted to accommodate additional fluid passages in the outer periphery of the fixed scroll, then the fluid passage can be added without interference, but the amount of deformation of the fixed scroll increases, resulting in reduced performance and reliability
Solution Approach 1:
The shrink belt is divided into multiple segments (first shrink belt and second shrink belt) positioned at different locations around the outer periphery of the fixed scroll. This segmentation allows each segment to independently provide restraint without interfering with fluid passages, while collectively maintaining overall structural stability and reducing deformation.
2Reliability
If the strength of the material of the fixed scroll is increased to suppress deformation, then the deformation amount is reduced, but the manufacturing cost significantly increases
Solution Approach 1:
The shrink belt acts as an intermediary component that provides the necessary restraint force to suppress deformation of the fixed scroll. Instead of increasing the strength and cost of the fixed scroll material itself, the shrink belt serves as a separate restraining element that achieves the same structural stability goal at lower manufacturing cost.
3Reliability
If the size of the fixed scroll is increased to suppress deformation, then the deformation amount is reduced, but the overall size of the scroll compressor increases
Solution Approach 1:
The shrink belt provides localized restraint at specific positions around the outer periphery of the fixed scroll where deformation is most critical. This localized reinforcement achieves effective deformation suppression without requiring a uniform increase in the size of the entire fixed scroll, thereby maintaining a compact overall compressor size.
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
This configuration effectively suppresses the deformation of the fixed scroll, enhancing the performance and reliability of the scroll compressor while allowing for additional fluid passages without significant cost or size increases.
Implementation Method 1
The at least two shrink belts are in interference fit between the outer periphery of the fixed scroll and the inner wall surface of the upper cap
Data Source
AI summary
The present invention discloses a scroll compressor. At least two shrink belts (23′, 23″, 26, 26′, 28, 28′) are provided around the outer periphery of said fixed scroll between the outer periphery of said fixed scroll (2) and the inner wall surface of the upper cap (1) of the scroll compressor. The at least two shrink belts are annular, and are in interference fit between the outer periphery of said fixed scroll and the inner wall surface of the upper cap. The at least two shrink belts include a main shrink belt (23′, 23″, 28) and an assistant shrink belt (26, 26′, 28′). The main shrink belt and the assistant shrink belt are arranged side by side in the axial direction, that is, in the vertical direction of the fixed scroll, and the main shrink belt and the assistant shrink belt are spaced apart from each other by a distance. In this way, it is allowed to add other special structure (e.g., an additional fluid passage) to the fixed scroll, reduce the deformation of the fixed scroll, and improve the performance and the reliability of the scroll compressor.