Turbomachine Guide Vane Flange Bevel for Seal Stability
Solution Overview
Problem
Existing guiding beam elements and flow machines face challenges in maintaining high sealing efficiency, especially under strong stress conditions, which can lead to fluid leaks and reduced operational efficiency.
Innovation Solution
The introduction of a guiding element with a unique transition design from the flange to the positioning agent, where the partial area of the positioning agent is beveled at a different angle, prevents contact with the sealing carrier and enhances the sealing effect by increasing surface pressure and preventing tilting or lifting of the sealing carrier.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the positioning means is designed to engage with the seal carrier, then the positioning and centering function is improved, but the seal tightness deteriorates due to increased contact area reducing surface pressure
Solution Approach 1:
The positioning means is segmented into two distinct functional surfaces: a first surface (e.g., cylindrical surface) that engages with the seal carrier for positioning and centering, and a second surface (e.g., beveled surface) that borders the flange but does not contact the seal carrier. This segmentation allows each surface to perform its specific function without interfering with the other, resolving the contradiction between positioning precision and seal tightness.
Solution Approach 2:
Different surfaces of the positioning means are given different geometric properties: the first surface has a geometry optimized for engagement with the seal carrier (e.g., cylindrical for radial contact), while the second surface has a different geometry (e.g., beveled at an angle) that prevents contact with the seal carrier under load. This local differentiation of surface properties allows the positioning function to be maintained while preventing the seal carrier from tilting or lifting, thereby maintaining seal tightness.
2Stability of the object's composition
If the support surface area is increased, then the stability of the seal carrier is improved, but the sealing efficiency deteriorates due to reduced surface pressure
Solution Approach 1:
The positioning means is divided into two surfaces with distinct functions: the first surface provides stable engagement with the seal carrier, while the second surface acts as a限位 feature that prevents excessive movement or tilting. This segmentation allows the seal carrier to be stable without requiring an excessively large support surface area on the flange, thereby maintaining high surface pressure and sealing efficiency.
Solution Approach 2:
The positioning means combines different geometric features (e.g., cylindrical surface plus beveled surface) into a composite structure that provides both stability and限位 function. This composite design allows the seal carrier to be firmly positioned and stabilized without increasing the contact area between the flange and seal carrier, thus maintaining high surface pressure and effective sealing.
3Power
If the guide vane segment is subjected to high loads, then the driving force is improved, but the seal tightness deteriorates due to tilting and lifting of the seal carrier
Solution Approach 1:
The second surface of the positioning means is designed in advance to prevent the tilting and lifting of the seal carrier that would occur under high loads. By providing a限位 surface that the seal carrier cannot contact during normal operation, the design preemptively counteracts the harmful effects of high loads before they can compromise seal tightness, allowing the guide vane segment to operate at high power without seal degradation.
Data Source
Figure 1
Figure 2a~4b
AI summary
The invention relates to a guide vane segment (10) for a turbomachine, in particular for an aircraft engine, comprising: - at least one guide vane element (12), which includes at least one flange (14) formed in a radial extension direction (R) of the guide vane element (12) and at least one positioning means (18) projecting from the flange (14) in the radial extension direction (R), and - at least one sealing carrier (30), which is arranged on the flange (14) and is aligned relative to the guide vane element (12) by means of the positioning means (18), wherein the flange (14) has a support surface (16) on which the sealing carrier (30) is supported, wherein in a transition (19) from the flange (14) to the positioning means (18) a partial surface (20) of the positioning means (18) adjoins the flange (14) and respective surface normals (17,21) the support surface (16) and the partial surface (20) enclose an angle (α) other than zero. The invention further relates to a guide vane element (12) for a guide vane segment (10), a guide vane ring, and a turbomachine.