Blade damping test bench

A test bench and blade technology, used in vibration testing, mechanical component testing, machine/structural component testing, etc., can solve the influence of blade damping characteristics, the study of frictional motion laws, and changes in blade damping characteristics are not considered. and other issues to achieve the effect of improving the technical level

Pending Publication Date: 2021-02-12
XIAN THERMAL POWER RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The current test platform for blade damping mainly focuses on the research on the law of frictional motion between a single blade and the disc, and most of them do not consider the influence of simultaneous excitation of blades at different positions on the blade damping characteristics.
The law of frictional motion between the double blades and the disc has not been studied, and the change of the damping characteristics of the blades under the condition of multiple excitations has not been considered

Method used

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  • Blade damping test bench
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Embodiment Construction

[0025] It should be noted that: any technical feature and any technical solution in this embodiment are one or more of a variety of optional technical features or optional technical solutions. All the alternative technical features and alternative technical solutions of the present invention are cited, and it is not convenient for the implementation of each technical feature to emphasize that it is one of the optional multiple implementation modes, so those skilled in the art should know: Any technical features and any technical solutions in the embodiments do not limit the protection scope of the present invention, and the protection scope of the present invention should include any alternative technical solutions that those skilled in the art can think of without creative efforts.

[0026] see figure 1 , a blade damping test bench provided by the present invention includes a base frame, a blade wheel disk fixing device, a blade shroud fixing device, an excitation loading dev...

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Abstract

The invention discloses a blade damping test bench. The blade damping test bench comprises a base rack, a blade wheel disc fixing device, a blade shroud ring fixing device, an excitation loading device and a vibration measuring device. A blade wheel disc is fixed on the basic rack through the blade wheel disc fixing device and the blade shroud ring fixing device, and multi-part multi-angle synchronous excitation and multi-part multi-angle synchronous vibration response measurement are carried out on the blade through the excitation loading device and the vibration measurement device. A test research basis is provided for a modern blade damping test.

Description

technical field [0001] The invention belongs to the technical field of test devices, in particular to a blade damping test bench. Background technique [0002] Blades are one of the important components of modern rotating machinery. In the working state, the blade bears the joint action of steady-state airflow force and unsteady-state airflow force. Under variable working conditions, the blades are also subjected to alternating stress. Therefore, blade vibration faults often occur, which poses a greater threat to the safe operation of rotating machinery. In order to suppress the occurrence of blade vibration failures, blade manufacturers and designers often use blade shrouds and various pull gold structures to reduce blade vibration. [0003] Due to the non-linear characteristics of collision or friction motion between blade dampers, it is difficult to use numerical simulation methods to study blade damping, and a general calculation and evaluation model has not yet been ...

Claims

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Application Information

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IPC IPC(8): G01M7/02G01M13/00
CPCG01M7/00G01M13/00
Inventor 闫安肖俊峰高松上官博张蒙
Owner XIAN THERMAL POWER RES INST CO LTD
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