Reciprocating Compressor Cylinder Block Weight Reduction
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Solution Overview
Problem
Existing reciprocating compressors face challenges in reducing weight and size due to the complex shape and increased weight of the cylinder block, which is often manufactured by casting and includes a fixing protrusion for stator attachment.
Innovation Solution
The reciprocating compressor design minimizes cast parts in the cylinder block, excludes the fixing protrusion from the block, and uses a support plate to stabilize the cylinder block, ensuring perpendicularity and roundness between the cylinder and bearing portions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the cylinder block includes a fixing protrusion for fastening to the stator, then the cylinder block can be securely attached, but the shape becomes complicated and weight increases
Solution Approach 1:
The fixing protrusion is extracted from the cylinder block and transferred to the stator as a fixing recess. This allows the cylinder block to be simplified in shape and reduced in weight, while the stator provides the attachment feature. The cylinder block and stator are separately manufactured with simpler geometries, then assembled together to achieve the same secure attachment function.
2Ease of manufacture
If the cylinder portion and bearing portion are post-assembled, then manufacturing flexibility increases, but perpendicularity and roundness cannot be secured
Solution Approach 1:
The cylinder portion and bearing portion are merged into a single integrated cylinder block manufactured by casting. This ensures perpendicularity and roundness are maintained through the casting process, while still allowing manufacturing flexibility by producing the entire block as one piece rather than requiring precise post-assembly of separate components.
3Manufacturing precision
If the cylinder block is made as a single body by casting, then perpendicularity and roundness are secured, but weight and complexity increase
Solution Approach 1:
The cylinder block is segmented into two parts: the main cylinder block containing the cylinder portion and bearing portion, and the fixing protrusion on the stator. The main block is manufactured by casting to ensure perpendicularity and roundness, while the fixing protrusion is provided separately on the stator. This segmentation allows the cylinder block itself to be lighter and simpler while maintaining manufacturing precision through the casting process.
Data Source
AI summary
A reciprocating compressor includes a shell, a driving motor, a drive shaft, a piston, a cylinder block, and a support plate disposed between the driving motor and the cylinder block to support the cylinder block with respect to the drive motor in an axial direction of the drive shaft. The support plate has one side surface coupled to the stator and another side surface coupled to the cylinder block. The reciprocating compressor is light-weighted and/or miniaturized by reducing a weight of the cylinder block, and perpendicularity and roundness with respect to the cylinder portion and the bearing portion is secured to improve reliability.