Pitot-Static Adapter Clamping Seal Mechanism
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Solution Overview
Problem
Existing pitot-static tube testing adapters face challenges with leaky dynamic seals and cumbersome seal replacement, particularly in aircraft pitot-static tube systems, which can lead to erroneous readings and safety risks due to the difficulty in achieving a reliable, leak-free connection without damaging the tube or ports.
Innovation Solution
A pitot-static testing adapter with an improved pitot seal featuring elongated body protrusions and a hemispherical groove for secure engagement with the pitot-static tube, along with a clamping mechanism that eliminates the need for adhesives, allowing for easy installation and replacement of seals, ensuring a leak-proof connection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a rubber seal is glued in place on both sides of the clamp, then the seal is retained securely, but the seal replacement becomes cumbersome and requires cutting and scraping
Solution Approach 1:
The seal retention system is segmented into modular components: the clamp assembly, the seal, and the seal grooves. This allows the seal to be independently replaced without removing or damaging the clamp structure, enabling easy maintenance while maintaining secure retention during operation.
Solution Approach 2:
The clamp acts as an intermediary mechanism between the seal and the adapter body. Instead of directly gluing the seal to the adapter, the clamp provides a removable mechanical fastening system that secures the seal during operation but allows easy removal for replacement.
2Reliability
If the top dynamic seal is made adhesive-bonded, then the seal is secured in place, but removal requires cutting and scraping which is difficult due to awkward access
Solution Approach 1:
The seal retention system transitions from a static adhesive bond to a dynamic mechanical fastening system using the clamp. This allows the seal to be securely retained during operation but easily removed when needed, transforming the retention method from permanent to temporarily fixed.
Solution Approach 2:
The seal removal process is simplified by extracting the seal from the adhesive-bonded state and placing it in a mechanically clamped state that allows easy extraction. The clamp design enables the seal to be quickly removed without cutting or scraping tools.
3Reliability
If a clamp with glued seals is used to attach the tester to the pitot-static tube, then the connection is secure, but the seal replacement is difficult and time-consuming
Solution Approach 1:
The connection system is segmented into the clamp mechanism and the seal component. This segmentation allows the seal to be independently accessed and replaced without affecting the clamp structure, significantly reducing replacement time while maintaining connection security during testing operations.
Solution Approach 2:
The seal is designed as a consumable component that can be quickly discarded when worn or damaged and replaced with a new seal. The clamp structure is recovered and reused, separating the disposable seal from the permanent fastening mechanism to minimize replacement time.
Data Source
AI summary
An adapter for isolating the at least one pressure port of a pitot-static tube from ambient conditions. The adapter can be used to perform aircraft anemometric testing and provides a replaceable, leak-proof seal for communicating pressures from the aircraft pitot-static system to testing equipment.