Scroll Compressor Barrel Casing Welding Deformation Control
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Solution Overview
Problem
The barrel casing in scroll compressors can deform during manufacturing, leading to defective products.
Innovation Solution
The solution involves forming first welds with high rigidity that effectively act on repeatedly welded portions, reducing deformation of the barrel casing. This is achieved through a specific welding process that aligns the repeatedly welded portions and first welds along the axial direction of the barrel casing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the barrel casing is welded during manufacturing, then the housing can be assembled, but the barrel casing deforms due to welding heat
Solution Approach 1:
The patent applies preliminary action by performing the first welding operation to create high-rigidity structures (array structures) before performing subsequent welding operations. These pre-formed rigid structures act as reinforcement that prevents deformation during later welding steps, thereby solving the contradiction between ease of manufacture and manufacturing precision.
2Ease of manufacture
If multiple welding operations are performed on the barrel casing, then complete assembly is achieved, but deformation increases at repeatedly welded portions
Solution Approach 1:
The patent performs the first welding operation to create array structures at strategically positioned repeatedly welded portions before performing subsequent welding operations. These pre-formed high-rigidity array structures prevent deformation during later welding steps, allowing complete assembly while maintaining precision at repeatedly welded portions.
3Strength
If welding is performed to join housing and barrel casing, then structural integrity is improved, but relative displacement occurs between components
Solution Approach 1:
The patent performs preliminary welding to create array structures that serve as rigid positioning features before final assembly welding. These pre-formed structures maintain precise relative positioning between the housing and barrel casing during the welding process, preventing relative displacement while ensuring structural integrity.
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 approach significantly reduces deformation of the barrel casing, ensuring consistent clearance between the fixed scroll and the barrel casing, thereby improving the sealing performance and reducing noise generation.
Implementation Method 1
The housing is tack-welded to the barrel casing
Data Source
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AI summary
A compressor (10) includes: a casing (20) including a tubular barrel casing (21) and an end casing (22); a housing (50); a first weld (Ma) formed by welding the barrel casing (21) and the housing (50) together; and a second weld (N) formed by welding the barrel casing (21) and the end casing (22) together. The second weld (N) includes a repeatedly welded portion (NB). The repeatedly welded portion (NB) and the first weld (Ma) are aligned along an axial direction (Z) of the barrel casing (21).