Scroll Compressor Baseplate Double-Welded T-Joint Vibration Reduction
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Solution Overview
Problem
Conventional scroll compressors experience vibration and noise issues due to the small contact surface between the central cap and the mounting base, leading to rocking movements, and are costly to manufacture due to complex deep-drawing and stamping processes with tight tolerances.
Innovation Solution
A scroll compressor design featuring a baseplate with a cylindrical rim secured by a double-welded T-joint, reducing mechanical deformation and thickness variations, and enhancing the contact area for stable mounting, thus reducing noise and vibration while lowering manufacturing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the mounting base is secured to the central cap via an annular welding seam, then the manufacturing process is simplified, but vibration and noise problems occur due to small contact surface
Solution Approach 1:
The patent transitions from a single annular welding seam (one-dimensional connection) to a double-welded T-joint configuration with inner and outer welding seams (two-dimensional connection area). This dimensional expansion of the welding structure increases the contact surface between the mounting base and central cap, thereby reducing vibration and noise while maintaining manufacturing simplicity.
2Ease of manufacture
If the central cap is manufactured by deep-drawing and stamping, then the baseplate structure is achieved, but thickness variations occur requiring tight tolerances
Solution Approach 1:
The patent divides the baseplate into two separate components: a mounting base and a central cap, which are manufactured independently and then joined by welding. This segmentation allows each component to be manufactured with standard tolerances, avoiding the thickness variations and tight tolerance requirements associated with deep-drawing and stamping processes.
3Reliability
If the mounting base and central cap are welded with small tolerances, then proper sealing with the midshell is ensured, but manufacturing costs increase
Solution Approach 1:
The patent applies welding in a partial manner - using two welding seams at the T-joint rather than welding the entire perimeter. This partial welding approach provides sufficient sealing and structural integrity while significantly reducing manufacturing complexity and cost compared to full-perimeter welding with tight tolerances.
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 design effectively reduces vibration and noise by stabilizing the compressor and simplifying manufacturing, meeting high-pressure standards with lower production costs and reduced mechanical deformation.
Implementation Method 1
an inner welding seam connecting an inner surface of the cylindrical rim to the mounting base
Implementation Method 2
an outer welding seam connecting an outer surface of the cylindrical rim to the mounting base
Data Source
AI summary
The scroll compressor (2) including a hermetic enclosure (3), a compression unit (11) configured to compress refrigerant, and an electric motor (16) configured to drive the compression unit (11) via a drive shaft (15), the hermetic enclosure (3) including a midshell (4), an upper cap (5) and a baseplate (6), the baseplate (6) including a mounting base (24) having a plate shape and including a central portion, and a cylindrical rim surrounding the central portion and extending upwardly, the cylindrical rim (28) being secured to the mounting base (24) by a double-welded T-joint (29), the double-welded T-joint (29) including an inner welding seam connecting an inner surface of the cylindrical rim (28) to the mounting base (24), and an outer welding seam connecting an outer surface of the cylindrical rim (28) to the mounting base (24).