Clamp for high-temperature vibration test of ceramic matrix composite turbine guide vane

By designing a high-temperature vibration test fixture suitable for ceramic matrix composite turbine guide vanes, and adopting a multi-directional positioning and cooling design, the problem of unstable clamping and cooling of existing devices in high-temperature environments has been solved, thus achieving both accuracy and equipment safety in high-temperature vibration testing.

CN120886186APending Publication Date: 2025-11-04BEIHANG UNIV
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Patent Information

Application Number
CN202511026455.5
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-07-24
Publication Date
2025-11-04

AI Technical Summary

Technical Problem

Existing high-temperature vibration testing equipment is insufficient to meet the high-temperature performance requirements of ceramic matrix composites, and its cooling effect is limited, resulting in excessively high temperatures in the testing equipment and affecting its normal operation.

Method used

A high-temperature vibration test fixture for ceramic matrix composite turbine guide vanes was designed. It adopts a high-temperature clamping assembly and a water-cooled base, combined with a multi-directional positioning and cooling design. It includes a split cover plate, a lower edge plate positioning clamping block and an upper edge plate positioning clamping block. Multi-directional positioning is achieved through threaded parts, and a cooling channel is set in the water-cooled base for efficient heat dissipation.

Benefits of technology

It provides stable multi-directional clamping capability, effectively isolates high-temperature heat flow, ensures safe operation of the vibration test bench at room temperature, improves test accuracy and equipment flexibility, and reduces manufacturing costs.

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Abstract

The invention relates to a clamp for a high-temperature vibration test of a ceramic matrix composite turbine guide vane, and aims to solve the problems that the test requirement of the high-temperature vibration test and effective cooling cannot be met in the prior art. The device comprises a high-temperature clamping assembly and a water cooling base. In the aspect of high-temperature testing, the high-temperature clamping assembly is composed of a split-half cover plate, an upper edge plate split-half positioning clamping block and a lower edge plate positioning clamping block, the tightness degree of the clamp is adjusted by adjusting a puller bolt and a threaded piece, stable positioning of the guide vane can be achieved in the axial direction, the radial direction and the circumferential direction, mechanical interference is reduced, and the structure frequency is adjusted. In the aspect of cooling, a multi-channel cooling system is arranged in the water-cooling base, and a nano composite material heat insulation plate is combined, so that high temperature is effectively isolated, and normal operation of the vibration test bed under the high-temperature condition is protected. The device is suitable for testing the vibration performance of the turbine guide vane in an environment of 1100 DEG C, and has the characteristics of high-temperature clamping capability, efficient heat dissipation performance and the like.
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