Axial Form-Locking Noise Reflector for Turbocharger Compressor
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Solution Overview
Problem
Existing noise reflectors for turbomachine compressors, particularly exhaust gas turbochargers, face challenges in achieving a secure and stable fastening to the housing while maintaining low production and assembly costs, and ensuring resistance against rotational movements and heat-induced disconnection.
Innovation Solution
The noise reflector features a form-locking element with a convex shape that engages a concavely shaped recess on the housing, creating a snap-in connection with high axial pull-out force and torsion resistance, ensuring a tight, play-free fit and enhanced radial tension, thus preventing disconnection due to vibrations or heat.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a noise reflector is designed as a separate conductive element with traditional fastening methods, then production and assembly costs remain low, but the fastening tightness and stability are insufficient
Solution Approach 1:
The noise reflector is divided into multiple axial sections with different radial extensions, allowing each section to be optimized independently for both manufacturing simplicity and fastening performance
Solution Approach 2:
The form-locking element extends in the axial direction rather than radially, creating a snap-in connection that provides superior axial pull-out resistance and torsion resistance while maintaining cost-effectiveness
2Ease of operation
If the form-locking element extends radially, then assembly is simplified, but axial pull-out force and torsion resistance are insufficient
Solution Approach 1:
The form-locking element is reoriented to extend in the axial direction, transforming the locking mechanism from radial to axial engagement, thereby achieving high pull-out force and torsion resistance without complicating assembly
Solution Approach 2:
The form-locking element features a convex outer surface that engages with a corresponding concave recess, creating a snap-in connection that provides mechanical interlocking resistance against pull-out and rotational forces
3Ease of manufacture
If conventional fastening methods are used, then production costs remain low, but the noise reflector may disconnect due to heat influence and vibrations
Solution Approach 1:
The convex-concave form-locking interface creates a positive mechanical interlock that prevents disconnection under thermal expansion and vibrational conditions while maintaining cost-effective manufacturing
Solution Approach 2:
The form-locking element is designed as an integrated, simple geometric feature rather than a separate expensive fastening component, achieving reliable connection stability through clever geometry rather than costly materials or complex assembly
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 configuration results in a stable, secure fastening of the noise reflector to the compressor housing, reducing noise propagation and preventing rattling, while maintaining low production costs and ensuring the noise reflector remains firmly attached even under operational stress.
Implementation Method 1
the form-locking element is arranged in the first length section... a form-locking connection is a mechanical locking in the form of a snap-in connection
Implementation Method 2
The noise is reduced by the noise reflector in particular through reflection and interference of sound waves generated by a compressor wheel of the compressor
Implementation Method 3
The noise is reduced by the noise reflector in particular through reflection and interference of sound waves
Data Source
AI summary
A noise reflector for a compressor of a turbomachine, in particular an exhaust gas turbocharger, is provided. The noise reflector includes at least one form-locking element with a direction of longitudinal extension, by way of which the noise reflector can be fastened to a housing part of the compressor such that a form-locking connection is produced, and the direction of longitudinal extension of the form-locking element goes in the axial direction.