Disc Spring Gasket Sealing Turbocharger Housings
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Solution Overview
Problem
Prior art turbochargers suffer from plastic deformation of gaskets between the turbine and bearing housings, leading to insufficient resilience and blowby, which impairs thermodynamic function, emission, and operational safety.
Innovation Solution
A resilient metal-to-metal disc spring gasket made of heat-resistant steel with a heat-resistant coating is used between the turbine and bearing housings, providing a flexible and efficient sealing solution that maintains sealing effectiveness under varying operational conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional gasket is used between the turbine housing and bearing housing, then the sealing function is initially provided, but the gasket deforms plastically upon assembly and loses resilience, causing blowby
Solution Approach 1:
The gasket material properties are changed from conventional elastic materials to disc spring elements made of elastic steel or superelastic materials. This parameter change in material composition and structural form enables the gasket to maintain resilient sealing capability throughout its service life without plastic deformation.
Solution Approach 2:
The gasket system uses composite construction by combining multiple disc spring elements with different properties (elastic steel and superelastic materials) to achieve both initial sealing and long-term durability. The composite material approach allows optimization of both immediate sealing reliability and sustained service life.
2Reliability
If multiple disc springs are installed radially spaced, then the sealing effectiveness is improved, but the device complexity increases
Solution Approach 1:
The gasket is segmented into multiple radially spaced disc spring elements distributed around the sealing surface. This segmentation allows each element to independently maintain sealing pressure in its zone, improving overall sealing effectiveness while the modular nature of individual disc springs keeps the complexity manageable.
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 disc spring gasket ensures operational safety and enhanced micro-sealing, preventing blowby and maintaining sealing integrity over the turbocharger's operational life, thereby improving thermodynamic performance and safety.
Implementation Method 1
a resilient gasket (6) is located in the gap between the bearing housing (3) and the turbine housing (2) resulting upon the assembly of the components
Implementation Method 2
the gasket can be provided with a heat-resistant coating on its contact surfaces
Data Source
AI summary
A charging device may include a turbine housing and a bearing housing. The bearing housing may have a bearing arrangement for a shaft carrying a turbine wheel and a compressor wheel. A gasket may be arranged by metal-to-metal connection between a radially orientated flat surface of the turbine housing and a radially orientated flat surface of the bearing housing. The gasket may be resilient.