Turbine Blade Retainer Sealing for Easier Assembly
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Solution Overview
Problem
Conventional methods for assembling and disassembling gas turbines are inefficient due to complex processes and require a large number of components, leading to low work efficiency, especially when replacing individual turbine blades.
Innovation Solution
A turbine design featuring a rotor disk with lower and disk hooks and turbine blades with blade hooks, supported by a retainer that includes a sealing plate, stopper plate, and fixture, allowing for easy assembly and disassembly by inserting the turbine blade into slots and using hooks to secure the retainer, facilitating the sealing of cooling passages.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional retainer is tightly fitted to the side of the blade or the rotor disk or fixed thereto by a fastening member, then sealing performance is improved, but assembly and disassembly processes become complicated and work efficiency decreases
Solution Approach 1:
The retainer is divided into multiple retainers that are respectively disposed at different locations along the turbine blade. Each retainer can be independently assembled and disassembled, simplifying the overall process while maintaining sealing effectiveness at each segment of the blade.
Solution Approach 2:
The fastening members are extracted from the retainer structure itself and integrated into the turbine blade and rotor disk components. The retainers utilize the existing hook structures on the blade and rotor disk for fixation, eliminating the need for separate fastening mechanisms on the retainers.
2Reliability
If a conventional retainer is fixed by a large number of members, then sealing performance is improved, but the number of components increases and work efficiency decreases
Solution Approach 1:
The hook structures formed on the turbine blade and rotor disk serve multiple functions: they provide attachment points for the retainers, structural reinforcement, and positioning features. This multi-functionality reduces the need for additional dedicated fastening components.
Solution Approach 2:
Multiple retaining functions are merged into a single retainer component that spans across the turbine blade. The retainer simultaneously seals cooling passages and provides structural support, consolidating what would traditionally require multiple separate components.
3Reliability
If conventional assembly methods are used, then stable sealing is achieved, but time consumption increases due to complicated processes
Solution Approach 1:
The hook structures are pre-formed on the turbine blade and rotor disk during manufacturing. These pre-prepared attachment features allow the retainers to be quickly installed without requiring complex assembly operations, significantly reducing assembly time while ensuring stable sealing.
Data Source
AI summary
A turbine, a gas turbine including the same, and a method of assembling and disassembling the same, capable of ensuring stable sealing performance as well as facilitating assembly and disassembly are provided. The turbine may include a rotor disk having a lower hook, a plurality of turbine blades installed on an outer peripheral surface of the rotor disk, each of the turbine blades having a blade hook located above the lower hook, and a retainer sealing a cooling passage defined between the turbine blade and the rotor disk and supported by the blade hook and the lower hook.