Scroll Compressor Orbiting Wrap Thickness Optimization
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Solution Overview
Problem
Scroll compressors with involute curve wraps face challenges in achieving high compression ratios due to limitations in size and wrap strength, leading to reduced reliability and efficiency.
Innovation Solution
The design incorporates an orbiting wrap with a thickness greater than the fixed wrap, increasing the wrap angle and maintaining a predetermined thickness ratio to enhance compression efficiency and reduce vibration, while optimizing the logarithmic spiral shape for improved strength and performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stress or pressure
If the winding number of the fixed wrap or the orbiting wrap is increased to obtain a high compression ratio, then the compression ratio is improved, but the scroll compressor increases in size
Solution Approach 1:
The patent changes the geometric parameters of the wrap by making the orbiting wrap thicker than the fixed wrap and increasing the wrap angle. This parameter modification allows achieving high compression ratios without increasing the number of windings, thereby avoiding an increase in compressor size while maintaining the required compression performance
2Productivity
If the fixed wrap or the orbiting wrap increases in height, then the compression capacity is improved, but the ratio of height to thickness of the wrap increases, reducing wrap strength
Solution Approach 1:
The patent optimizes the thickness parameter of the orbiting wrap, making it greater than that of the fixed wrap. This thickness increase allows the wrap to maintain sufficient strength even when the height increases for greater compression capacity, thereby resolving the contradiction between compression capacity and wrap strength
Solution Approach 2:
The patent employs different thicknesses for the orbiting wrap and fixed wrap, creating a composite structural configuration. The orbiting wrap with greater thickness provides enhanced strength where needed, while the overall structure maintains high compression capacity through optimized geometric parameters
Data Source
AI summary
A scroll compressor is provided that may include a casing including a rotational shaft, a first scroll rotated by rotation of the rotational shaft, the first scroll including a first head plate and a first wrap that extends from the first head plate in a first direction, and a second scroll that defines a plurality of compression chambers together with the first scroll, the second scroll including a second head plate and a second wrap that extends from the second head plate in a second direction. Each of the first and second wraps spirally may extend from an outer end toward an inner start end, and the first wrap may have a thickness greater than a thickness of the second wrap.