Turbomachine Blade Tuning Element Guide Housing

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Solution Overview

Problem

Turbomachine blade or vane arrangements face challenges in maintaining the integrity and service life of tuning elements due to exposure to operating gases, particularly in gas turbines, where existing solutions fail to provide effective protection and long-term reliability.

Innovation Solution

The implementation of a blade or vane arrangement with multi-part tuning element guide housings that are welded or fastened using a locking plate, ensuring gas-tight cavities and secure attachment within the turbomachine blade or vane, utilizing materials like Haynes 230 or Hastelloy X, and employing form-fitting or friction-fitting mechanisms to prevent withdrawal and enhance service life.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If tuning elements are exposed to operating gases in the turbomachine, then the turbomachine can operate, but the service life and reliability of tuning elements deteriorate due to gas exposure

Engineering Contradiction:

Improveservice life of tuning elementsVSAvoidexposure to operating gases

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The guide housing is divided into multiple parts (first guide housing part and second guide housing part) that can be assembled together to form a complete protective enclosure. This segmentation allows for easier manufacturing, assembly, and maintenance while providing complete protection against gas exposure.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The tuning elements are designed as replaceable components with limited service life due to gas exposure. By placing them in protected cavities, they can be easily replaced when worn, similar to disposable components, while the protective guide housing structure remains reusable.

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

2Ease of manufacture

If the guide housing is made as a single piece, then manufacturing is simpler, but adaptability and ease of repair are reduced

Engineering Contradiction:

Improveguide housing manufacturingVSAvoidease of replacement

Core Design Contradiction:

Ease of manufactureVSAdaptability or versatility

Solution Approach 1:

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The modular design allows individual components to be discarded or recovered independently. The tuning elements can be replaced without removing the entire guide housing, and the guide housing parts can be recovered and reused, optimizing resource utilization.

Inventive Principle:

Principle #34Discarding and recovering

3Reliability

If the guide housing is securely fastened in the recess, then reliability improves, but ease of repair deteriorates due to permanent attachment

Engineering Contradiction:

Improvesecure fasteningVSAvoidreplacement difficulty

Core Design Contradiction:

ReliabilityVSEase of repair

Solution Approach 1:

The fastening system transitions from a static permanent attachment to a dynamic reversible connection. The reversible fastening mechanism allows the guide housing to be securely attached during operation for reliability, but easily removed when maintenance is needed, adapting to different operational states.

Inventive Principle:

Principle #15Dynamics

4Object-affected harmful factors

If all cavities are closed in a gas-tight manner, then protection against operating gases improves, but device complexity increases due to additional sealing requirements

Engineering Contradiction:

Improveprotection against operating gasesVSAvoidsealing structure complexity

Core Design Contradiction:

Object-affected harmful factorsVSDevice complexity

Solution Approach 1:

Inventive Principle:

Principle #1Segmentation

Data Source

PatentUS10247005B2Blade or vane arrangement for a turbomachine

Publication Date: 2019.04.02 MTU AERO ENGINES GMBH

AI summary

A blade or vane arrangement for a turbomachine includes a turbomachine blade or vane and at least one tuning element guide housing with at least one cavity, in which at least one tuning element, which is provided for impact contact with the tuning element guide housing is taken up, the tuning element guide housing being arranged in a recess of the turbomachine blade or vane, wherein the cavity of the tuning element guide housing in which the tuning element is taken up, is closed in a gas-tight manner.