Compressor Housing Volute Angle Adjustment for Casting Precision
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Solution Overview
Problem
Current methods for manufacturing compressor housings, such as sand casting and pressure die casting, face issues with dimensional inconsistency, poor surface finish, and leakage/containment problems, particularly when trying to create a single piece volute with a cross-sectional shape that includes a radially outwardly protruding lip, which is essential for aligning circulating flow effectively.
Innovation Solution
A method involving casting the compressor housing around a core within a die, removing the core through an opening in the outlet volute, and applying a cut to increase the angle between the diffuser and outlet volute sections, allowing for pressure die casting to produce a single piece volute with improved flow alignment and surface finish.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If sand casting is used to manufacture compressor housing, then it can produce complex shapes, but dimensional consistency and surface finish are poor
Solution Approach 1:
The patent transitions from sand casting to pressure die casting, fundamentally changing the manufacturing parameters and process characteristics. This parameter change enables achieving both complex shapes and high dimensional consistency with excellent surface finish, resolving the contradiction between shape complexity and manufacturing precision
2Manufacturing precision
If pressure die casting is used to manufacture single piece volute with lip, then surface finish and dimensional consistency improve, but leakage and containment problems occur
Solution Approach 1:
The patent divides the volute into multiple separately cast sections that are subsequently joined together. This segmentation allows each section to be manufactured with high precision and proper containment features, while the assembly process enables leakage prevention through sealing between sections, resolving the contradiction between surface finish and reliability
3Ease of operation
If a single piece volute with radially outwardly protruding lip is created, then flow alignment is improved, but manufacturing complexity and difficulty increase
Solution Approach 1:
The patent segments the volute into multiple sections, with the lip feature incorporated into one of the sections. This allows the complex lip geometry for flow alignment to be manufactured separately with appropriate tools and processes, then assembled with other volute sections, reducing overall manufacturing difficulty while maintaining flow alignment benefits
4Adaptability or versatility
If multiple separate sections are assembled to form volute, then manufacturing flexibility increases, but leakage and containment problems arise
Solution Approach 1:
The patent incorporates preliminary sealing features and containment designs into each volute section during the casting process. These preliminary actions ensure that when sections are assembled, leakage is prevented and containment is maintained, resolving the contradiction between manufacturing flexibility and reliability
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
This approach enables the production of a single piece compressor housing with enhanced flow alignment and reduced losses, providing a better surface finish and increased dimensional consistency, while allowing for the use of pressure die casting to achieve these benefits.
Implementation Method 1
providing a molten metal within the mould cavity and solidifying the molten metal to form a compressor housing
Data Source
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AI summary
A method of manufacturing a compressor housing is provided including arranging a core with a die to define a mould cavity, solidifying a metal within the cavity to form a compressor housing having a diffuser first wall and an outlet volute first wall with an opening; the housing being formed such that a first angle is subtended between an outlet section of a surface of the diffuser first wall and a first section of a surface of the outlet volute first wall, wherein after the housing has been formed, the core is removed and a cut is applied, through the opening, to the first section of the surface of the outlet volute first wall to produce a cut section such that a second angle is subtended between the cut section and the outlet section of the surface of the diffuser first wall that is greater than the first angle.