Linear-Pivot Closure Mechanism for Electromagnetic Seals
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Solution Overview
Problem
Conventional electromagnetically sealed measuring stations experience premature wear and failure of sealing materials due to excessive stress when using a normal rotational hinge for door opening, leading to a compromised electromagnetic seal.
Innovation Solution
A closure mechanism that initially moves the door linearly away from the door frame perpendicular to its plane and then pivots open, reducing stress on the sealing material and ensuring electromagnetic contact only after the door is removed from the seal, utilizing a guide system with guide pins and a diagonal slot to facilitate easy door withdrawal with minimal energy expenditure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a normal rotational hinge is used for door opening, then the door can be opened easily, but the sealing material experiences excessive stress and wears out rapidly
Solution Approach 1:
The door is first moved linearly away from the door frame in a direction perpendicular to its plane before being pivoted open. This preliminary linear movement separates the door from the sealing material, preventing the sealing material from experiencing stress during the subsequent rotational opening motion, thereby resolving the contradiction between ease of operation and sealing durability
Solution Approach 2:
The door opening motion is divided into two distinct phases: a linear withdrawal phase and a rotational opening phase. This segmentation allows the door to be opened easily while protecting the sealing material, as the linear movement handles the separation and the rotational movement handles the final opening without stress on the seal
2Reliability
If sealing pins are provided on the door edges to ensure electromagnetic seal, then the electromagnetic seal is improved, but the sealing material deforms and wears out due to stress concentration
Solution Approach 1:
The linear movement of the door away from the door frame occurs before the rotational opening, which preliminarily separates the sealing pins from the sealing material. This prevents stress concentration on the sealing material while maintaining the electromagnetic seal quality through the rebate-groove engagement
3Reliability
If the door is moved linearly away from the door frame before pivoting open, then the sealing material stress is reduced, but the door mechanism becomes more complex
Solution Approach 1:
The linear movement and rotational opening motions are combined into a single integrated closure mechanism. The guide pins moving through diagonal slots and the hinge system work together to automatically produce the linear-withdrawal-then-rotate sequence, protecting the sealing material without requiring a separately controlled complex mechanism
Data Source
AI summary
A closure mechanism for an electromagnetically sealed measuring station, which comprises a test chamber, a door for closing the test chamber, and an electromagnetic seal, which is fitted to a door frame of the test chamber. The door is moved initially in a linear manner away from the test chamber and after that pivoted in a rotating movement. The closure mechanism according to the invention then seals a measuring station electromagnetically if an electromagnetic seal is fitted in a peripheral groove in the doorframe of the test chamber, and the door provides a peripheral rebate, which engages in the groove in the doorframe.