Heat storage device based on negative expansion material and self-adapting sealing structure and preparation method thereof

By employing negative expansion materials and adaptive sealing structures in high-temperature thermal storage devices, and utilizing a combination of solid waste-based negative expansion composite material layers and SMA-driven adaptive sealing components, the problem of unstable sealing at high temperatures was solved, enabling long-term stable operation of the high-temperature thermal storage devices.

CN122149236APending Publication Date: 2026-06-05XIAN THERMAL POWER RES INST CO LTD +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
XIAN THERMAL POWER RES INST CO LTD
Filing Date
2026-01-23
Publication Date
2026-06-05

AI Technical Summary

Technical Problem

Existing technologies lack sealing structures and high-performance composite sealing materials that can effectively adapt to high-temperature environments and have adaptive compensation capabilities in high-temperature thermal storage devices, resulting in unstable sealing performance and difficulty in maintaining good sealing performance under long-term high temperatures.

Method used

By employing negative expansion materials and an adaptive sealing structure, a solid waste-based negative expansion composite material layer is set on the inner wall of the thermal storage shell, and an SMA-driven adaptive sealing component is set at the end. The volume shrinkage characteristics of the negative expansion material and the thermoelastic martensitic phase transformation of the SMA alloy are utilized to achieve deformation compensation and improve sealing performance.

Benefits of technology

It achieves long-term stable operation of high-temperature thermal storage devices, improves sealing performance through a dual mechanism, adapts to shell deformation caused by temperature changes, and maintains stable sealing performance.

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Abstract

The present disclosure provides a heat storage device based on a negative expansion material and an adaptive sealing structure and a preparation method, comprising the following steps: S10: preparing a solid waste-based negative expansion composite material layer; S20: preparing an SMA-driven adaptive sealing assembly; S30: fixing the solid waste-based negative expansion composite material layer to the inner wall of the heat storage shell of the high-temperature heat storage device, and connecting the SMA-driven adaptive sealing assembly to the port of the heat storage shell. The preparation method of the present disclosure obtains a heat storage device based on a negative expansion material and an adaptive sealing structure, which realizes deformation compensation, improves the sealing performance of the high-temperature heat storage device, and realizes long-term stable operation of the high-temperature heat storage device through the dual effects of the solid waste-based negative expansion composite material layer in the heat storage shell and the SMA-driven adaptive sealing assembly at the end of the heat storage shell.
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