A gap-adjustable group-crowned blade vibration test experimental device

By designing an adjustable gap crown blade vibration testing device, the problem of the existing device's inability to adjust the gap was solved, enabling the study of the impact of adjacent crown gaps on the system's vibration characteristics, and improving measurement accuracy and blade lifespan.

CN224416394UActive Publication Date: 2026-06-26CHANGAN UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
CHANGAN UNIV
Filing Date
2025-09-15
Publication Date
2026-06-26

AI Technical Summary

Technical Problem

Existing experimental analysis devices for crowned blades cannot easily achieve adjustable gaps between groups of crowned blades, making it difficult to study the impact of the gaps between adjacent blades on the vibration characteristics of the system and affecting measurement accuracy.

Method used

An experimental device was designed, comprising a base, a vise body, a clamping plate, a vibrator, and a force sensor. The gap size between adjacent blades was determined by adjusting the clamping plate, gap plate, and vise body, and measured with a feeler gauge. The gap was adjusted by using gap plates of different thicknesses. The vibration response and vibration reduction characteristics were explored in conjunction with the vibrator and force sensor.

Benefits of technology

This technology enables adjustable gaps between adjacent blades, allowing for the study of their impact on system vibration characteristics, thus improving measurement accuracy and turbine blade lifespan.

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Abstract

The utility model discloses a kind of group crown blade vibration test experimental devices with adjustable gap, it is related to group crown blade vibration test technical field, including base, vice body and clamping plate.The utility model discloses group crown blade vibration test experimental devices with adjustable gap, by setting force sensor and exciting force of exciting rod main part is acted on crown blade main body, and then make crown blade be excited, the influence law of the vibration response and the vibration reduction characteristic of crown blade system under different gaps are discussed, and the optimal parameter is obtained according to its vibration law;The gap size between adjacent leaf crown is determined by the locking adjustment of clamping plate, gap piece and vice body, and then the gap size is measured by calipers, and gap piece of different thickness is matched, so that the gap between adjacent leaf crown can be adjusted, to ensure that staff can study the influence of the gap between adjacent leaf crown on system vibration characteristic.
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