Aerodynamic Spacer Members for Turbocharger Guide Ring Structural Support
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Solution Overview
Problem
Spacer members in variable geometry turbine (VGT) turbochargers disrupt gas flow and reduce efficiency, while also compromising structural integrity.
Innovation Solution
Positioning aerodynamically shaped spacer members radially inwardly in the vaneless space between guide vane members and the turbine wheel to provide direct structural support and optimize gas flow, with the number, shape, and location of spacer members tailored for specific performance characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If spacer members are positioned in the vaneless space, then structural integrity is improved, but gas flow efficiency deteriorates
Solution Approach 1:
The spacer members are given an aerodynamic and curved shape rather than straight or angular forms. This curvature allows the spacers to blend more smoothly with the gas flow paths, reducing turbulence and flow disruption while maintaining their structural support function in the vaneless space.
Solution Approach 2:
The spacer members are positioned at specific locations and angled appropriately within the vaneless space to provide structural support where needed while minimizing interference with gas flow in critical areas. The local positioning and orientation are optimized to balance structural requirements with flow efficiency.
2Strength
If spacer members are positioned radially inwardly, then structural support is improved, but device complexity increases
Solution Approach 1:
The spacer members serve multiple functions simultaneously: they provide structural support to the guide ring, define the vaneless space geometry, and guide gas flow into the turbine wheel. This multi-functionality reduces the need for separate components and simplifies the overall device design despite the precise positioning requirements.
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
Enhances the structural integrity and efficiency of VGT turbochargers, reducing inefficiencies and costs by improving gas flow and durability.
Implementation Method 1
The spacer members preferably have an aerodynamic and/or curved shape and are positioned and angled to provide efficient gas flow to and through the turbine
Data Source
AI summary
A turbocharger comprising: a turbine wheel; a compressor wheel; a shaft member connecting the turbine wheel and the compressor wheel, the shaft member, turbine wheel, and compressor wheel being located along the same longitudinal axis; and a varying geometric technology system comprising a first guide ring member, a second guide ring member, a plurality of rotatable guide vane members positioned between the first and second guide ring members and in a substantially circular arrangement at a first radius from the longitudinal axis, and a plurality of spacer members also positioned between the first and second guide ring members, and located between the longitudinal axis and the circular arrangement of guide vane members.