Turbocharger Turbine Double-Layer Volute Partition Wall
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Solution Overview
Problem
Conventional variable cross-section turbochargers with rotary vanes have high costs and short service life due to high exhaust temperatures and complex adjusting structures, limiting their market effectiveness.
Innovation Solution
A turbocharger with a double-layer flow passage and variable cross-section design, featuring an internal and external volute gas feeding passage divided by a partition wall, which allows for efficient energy utilization and eliminates the need for complex rotary vane control systems, utilizing conventional casting and machining techniques.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If rotary nozzle vanes with transmission mechanism are used to achieve variable cross-section, then the flow channel can be adjusted conveniently, but the cost increases and service life decreases due to high exhaust temperature and complex structure
Solution Approach 1:
The invention extracts and eliminates the complex rotary nozzle vanes and transmission mechanism from the system. Instead of using adjustable components, the patent employs a fixed cross-section turbine housing with optimized flow passage geometry that achieves variable flow characteristics through the shape and configuration of the passages themselves, thereby removing the unreliable moving parts while maintaining flow control capability
Solution Approach 2:
The invention changes the geometric parameters of the flow passages, specifically using a free-vortex design where the passage cross-section and curvature vary continuously along the flow path. This geometric parameter optimization allows the fixed structure to deliver variable flow characteristics across different operating conditions without requiring mechanical adjustment components
2Ease of operation
If rotary nozzle vanes with transmission mechanism are used to achieve variable cross-section, then the flow channel can be adjusted conveniently, but the cost increases due to complex adjusting structure
Solution Approach 1:
The invention extracts and eliminates the complex rotary nozzle vanes and transmission mechanism from the system. Instead of using adjustable components, the patent employs a fixed cross-section turbine housing with optimized flow passage geometry that achieves variable flow characteristics through the shape and configuration of the passages themselves, thereby removing the unreliable moving parts while maintaining flow control capability
Solution Approach 2:
The flow passages are designed with self-adjusting geometric features that automatically adapt to different flow conditions. The free-vortex configuration and varying passage cross-sections inherently regulate flow distribution without requiring external control systems, making the structure self-sufficient and eliminating complex adjusting mechanisms
3Use of energy by moving object
If high exhaust temperature is used for engine power, then energy utilization is improved, but the nozzle vanes and transmission mechanism suffer from thermal stress reducing service life
Solution Approach 1:
The invention extracts and eliminates the complex rotary nozzle vanes and transmission mechanism from the system. Instead of using adjustable components, the patent employs a fixed cross-section turbine housing with optimized flow passage geometry that achieves variable flow characteristics through the shape and configuration of the passages themselves, thereby removing the unreliable moving parts while maintaining flow control capability
Solution Approach 2:
The invention replaces expensive, temperature-sensitive moving parts (nozzle vanes and transmission mechanism) with a simple, robust fixed structure that can withstand high temperatures. The fixed turbine housing with optimized passages is designed to endure thermal stress without the maintenance and replacement issues associated with moving components in high-temperature environments
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 design enhances reliability, reduces costs, and effectively meets engine boost demands across various speed conditions by optimizing gas flow and energy usage, while maintaining a simple and upgradeable structure.
Implementation Method 1
the exhaust gas discharged by an engine during normal operation is collected through the turbine housing 5, passes through a volute gas feeding passage, and then is distributed around the power turbine 9
Implementation Method 2
the exhaust gas... passes through a volute diffuser channel 7, thereby pushing the power turbine 9 to rotate at high speed
Implementation Method 3
a power turbine 9... pushing the power turbine 9 to rotate at high speed
Implementation Method 4
A compressor impeller 14 is driven to rotate to compress gas at high speed through a turbine rotor shaft 13
Implementation Method 5
compress gas at high speed through a turbine rotor shaft 13
Data Source
AI summary
A turbocharger turbine having a double-layer flow passage and a variable cross-section, including a turbine housing, a volute diffuser channel, a power turbine, a volute gas feeding passage, and a partition wall. The volute gas feeding passage is arranged in the turbine housing. The partition wall is arranged in the volute gas feeding passage and divides the volute gas feeding passage into an external volute gas feeding passage and an internal volute gas feeding passage. The external volute gas feeding passage is located outside the internal volute gas feeding passage. The combination of the external and internal volute gas feeding passages forms different flow areas, sufficiently utilizing the waste gas energy of engines in a segmented mode. The variable cross-section turbine has a simple structure, is easy to upgrade at low cost, and can be easily mass-manufactured.