Multi-Scroll Turbine Valve Assembly With Spring Damping for Wear Control
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Solution Overview
Problem
Multi-scroll turbines experience performance degradation due to separation issues between spirals at certain operating states, leading to increased wear and noise in valve assemblies, which affects the reliability and efficiency of the system.
Innovation Solution
A valve assembly for multi-scroll turbines featuring a lever and a valve closing element with a spring element to dampen relative movements, reducing vibrations and wear, and incorporating a cylindrical projection and sliding contact surfaces for improved sealing and noise reduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a valve assembly is used to control overflow and bypass opening in multi-scroll turbines, then the performance degradation at certain operating states is addressed, but increased wear and noise occur in the valve assembly
Solution Approach 1:
The patent introduces a spring element that pre-biases the valve closing element against the lever to compensate for relative movements before they cause damage. This cushioning effect prevents direct metal-to-metal contact during vibrations, reducing wear on the valve closing element and valve seat area beforehand, while also dampening noise from the valve assembly during operation.
2Device complexity
If the valve closing element is directly connected to the lever, then the structure is simple, but vibrations and wear increase during operation
Solution Approach 1:
The spring element serves as an intermediary component between the lever and the valve closing element. It mediates the force transmission while allowing for relative movements and vibrations to be absorbed. This intermediary spring connection maintains structural simplicity while significantly improving component durability by preventing direct rigid contact during operational vibrations.
3Ease of manufacture
If the valve assembly operates without damping elements, then the structure is simpler and manufacturing is easier, but vibratory movements cause increased wear and noise
Solution Approach 1:
The spring element is pre-installed to provide cushioning against vibratory movements before they can cause harmful effects. This beforehand cushioning approach maintains ease of manufacture while effectively reducing vibrations and noise during valve assembly operation, as the spring absorbs energetic fluctuations in the exhaust gas flow.
Solution Approach 2:
The spring element converts the harmful vibratory movements and energetic fluctuations in exhaust gas flow into beneficial damping effects. By allowing controlled deformation of the spring, the harmful kinetic energy is transformed into elastic potential energy and then dissipated, reducing wear and noise while maintaining manufacturing simplicity.
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 solution effectively reduces wear on valve components and the turbine housing, enhances noise reduction, and increases the system's reliability and lifecycle by damping vibratory movements and optimizing the bypass or overflow function.
Implementation Method 1
a spring element (130) which is designed to pre-bias the valve closing element (120) against the lever (110) so that relative movements between the lever (110) and the valve closing element (120) may be compensated for or damped
Implementation Method 2
a spring element (130) which is designed to pre-bias the valve closing element (120) against the lever (110)
Data Source
AI summary
The invention relates to a valve assembly (100) for a multi-scroll turbine (10) for controlling an overflow of exhaust gases between a first spiral (36) and a second spiral (38) and for controlling a bypass opening (50). The valve assembly 100 comprises a lever (110) and a valve closing element (120) which is operatively connected to the lever (110). Furthermore, the valve assembly (100) comprises a spring element (130) which is designed to pre-bias the valve closing element (120) the against lever (110).