Gas medium sealed cavity volume compensation device and method

Abstract

This invention discloses a gas medium sealed cavity volume compensation device and method, belonging to the field of sealed cavity pressure balance technology. The device includes a sealed rigid cavity and a flexible elastic component. The flexible elastic component is an independent, closed elastic body pre-encapsulated with gas, forming a completely sealed structure arranged within the gas medium inside the cavity. The device employs an asymmetric design system: negative pressure with positive parameter determination and positive pressure with reverse verification. It uses low-temperature negative pressure conditions as the design benchmark, quantifies the gasbag parameters using thermodynamic formulas to eliminate cavity negative pressure, and uses a 20% volume fluctuation rate as the rigid cavity sealing safety threshold. Under high-temperature conditions, reverse verification is performed by comparing the actual pressure fluctuation with the gasbag with the theoretical natural rise without the gasbag. The compensation component is made of highly elastic material, allowing for a large proportion of reversible deformation. This device is suitable for high-protection-level fully sealed equipment.

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