Adjustable Mixing Housing for Gas Turbine Combustor Alignment
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The assembly of mixing housings in gas turbines is hindered by significant dimensional, shape, and positional variances between the mixing housing and the inner housing of the skeleton turbine, necessitating the production of specific combustors and complex alignment processes.
Innovation Solution
An adjustable mixing housing arrangement with a bolt, pressure plate, and wedge washer adjustment device, allowing for spherical movement and maintaining concentric position with the flame tube, enables alignment with the inner housing without individual template transfer, facilitating the use of standardized combustors and retrofitting existing machines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a specific combustor is manufactured for each gas turbine to accommodate dimensional and positional variances, then alignment precision is improved, but device complexity and manufacturing cost increase
Solution Approach 1:
The mixing housing is designed with adjustable positioning relative to the outer housing, allowing dynamic adaptation to different inner housing positions. The adjustment device enables the mixing housing to be shifted radially by approximately 4 mm to compensate for production variances, eliminating the need for individual template transfer and custom combustor manufacturing for each gas turbine.
2Manufacturing precision
If individual template transfer is used to adapt mixing housing to inner housing position, then alignment accuracy is improved, but loss of time and productivity decrease
Solution Approach 1:
The adjustment device is pre-installed on the mixing housing, allowing for quick and easy positioning adjustments during assembly. This eliminates the time-consuming process of individual template transfer and manual alignment, while still achieving the required alignment accuracy between the mixing housing and inner housing.
3Ease of manufacture
If standardized combustors are used without adjustment capability, then ease of manufacture is improved, but adaptability to positional variances worsens
Solution Approach 1:
The mixing housing incorporates an adjustment device that enables standardized combustors to adapt to positional variances in the inner housing. The adjustable positioning mechanism allows the mixing housing to be shifted radially to accommodate production tolerances, maintaining both standardization benefits and adaptability to individual gas turbine configurations.
Data Source
Figure 1
Figure 2
Figure 3
AI summary
Disclosed is a method for mounting a mixing housing in a gas turbine comprising a flame tube (2), an interior housing (8), and a mixing housing (4) which is disposed between the flame tube (2) and the interior housing (8). In said method, the mixing housing (4) is adjusted relative to the flame tube (2) and the interior housing (8) by means of an adjusting device (8) that is provided for said purpose.