Scroll Compressor Adjustment Portion Center-of-Gravity Noise Reduction
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Solution Overview
Problem
Existing scroll compressors face challenges in increasing fluid compression capacity while maintaining quiet operation and low production costs, as extending the spiral element to increase compression chamber size disrupts the center-of-gravity of the second scroll, leading to noise issues and manufacturing difficulties due to reduced fluidity of molten metal.
Innovation Solution
The scroll compressor design includes a second scroll with an end plate featuring a spiral element and adjustment portions that are recessed to adjust the center-of-gravity, with specific peripheral surface lengths and connection surfaces to enhance molten metal fluidity during casting, allowing for deeper recession of adjustment portions without compromising production efficiency or increasing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the length of the spiral element is increased in the driving axis direction to increase compression chamber size, then the fluid compression capacity is improved, but the center-of-gravity of the second scroll shifts from the driving axis causing increased noise
Solution Approach 1:
The invention changes the geometric parameters of the adjustment portions by making the first peripheral surface shorter than the second peripheral surface in the driving axis direction. This parameter modification allows the adjustment portions to be recessed deeper while maintaining proper center-of-gravity positioning, thereby enabling both increased compression capacity and reduced noise operation.
2Object-generated harmful factors
If the adjustment portions are recessed further deeply to maintain center-of-gravity alignment after increasing spiral element length, then noise is reduced, but the fluidity of molten metal is reduced making production difficult
Solution Approach 1:
The invention optimizes the geometric parameters of the adjustment portions by configuring the first peripheral surface to be shorter than the second peripheral surface in the driving axis direction. This specific parameter configuration allows deeper recession of adjustment portions for noise reduction while maintaining adequate molten metal fluidity during casting, thus resolving the manufacturing difficulty.
3Object-generated harmful factors
If the adjustment portions are recessed further deeply to maintain center-of-gravity alignment, then noise is reduced, but production cost increases
Solution Approach 1:
The invention changes the geometric parameters of the adjustment portions with the first peripheral surface being shorter than the second peripheral surface, enabling deeper recession that reduces noise while maintaining production efficiency and avoiding increased production costs.
Data Source
AI summary
A scroll compressor includes a housing, a first scroll, a second scroll being configured to rotate relative to the first scroll about a driving axis of the scroll compressor. The second scroll has an end plate, a spiral element, and an adjustment portion adjusting a center-of-gravity of the second scroll. The adjustment portion has a bottom surface, a peripheral surface enclosing the bottom surface, and a connection surface connecting the bottom surface to the peripheral surface. The peripheral surface has a first peripheral surface and a second peripheral surface. A length of the first peripheral surface in a direction in which the driving axis extends is shorter than a length of the second peripheral surface in the direction in which the driving axis extends.