Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Vibration testing device of damping mistuning blade-turbine disk with damping block structure

A technology of vibration testing and damping blocks, which is applied in the field of experimental devices, can solve the problems of insufficient research on mechanism and little understanding of performance, and achieve the effect of simple structure and convenient operation

Active Publication Date: 2016-09-07
XI AN JIAOTONG UNIV
View PDF6 Cites 16 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Based on the above reasons, the research on the relationship between damping mistuned blades and discs, especially the mechanism research, is still insufficient, and there is little understanding of the performance under actual operating conditions.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Vibration testing device of damping mistuning blade-turbine disk with damping block structure
  • Vibration testing device of damping mistuning blade-turbine disk with damping block structure
  • Vibration testing device of damping mistuning blade-turbine disk with damping block structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0030] The present invention will be further explained below in conjunction with the drawings.

[0031] See figure 1 , The present invention is a damping detuned blade-wheel vibration testing device with a damping block structure, which includes a base stand, a wheel disk fixing device, a blade root fixing device, a centrifugal force loading device, an exciting vibration generating device and a measuring device.

[0032] See figure 2 , First introduce the turbine blades in the experiment. The turbine blade is composed of a shroud 9, a damping block 10, a blade body 11 and a blade root 12. In the working state, due to the centrifugal force, on the one hand, the blade root 12 and the wheel disc 13 are in close contact with and pressed against the tooth surface of the corresponding wheel groove; on the other hand, the blade body 11 is twisted and restored, so that the adjacent blade shroud 9 Touch and press tightly. Under the action of the airflow excitation force, relative slippag...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a vibration testing device of a damping mistuning blade-turbine disk with a damping block structure. A turbine disk fixing device is fixed at the center of the bottom plate of a base frame; the pre-tightening force of a blade root fixing device can be increased by adjusting a nut, so that the blade root fixing device can be fixed between the edge of a turbine disk and the root of a blade; one end of a centrifugal force loading device is connected onto a damping block of a vane shroud ring, and the other end of the centrifugal force loading device winds around a slide rod and is vertically arranged; the centrifugal force loading device is used for controlling and making the centrifugal force of the blade damping block mistuned; an excitation generating device is fixed on an excitation plate of the base frame; and a measuring device is installed inside and outside the excitation plate and is fixed on the bottom plate of the base frame through bolts. The vibration testing device can be used for measuring the vibration feature of the damping mistuning blade-turbine disk system with the nonlinear dry friction damping block structure under an actual operating condition and can provide a reference basis for the design and failure analysis of the blade-turbine disks of high-performance engines, gas turbines and turbines.

Description

Technical field [0001] The invention relates to the technical field of experimental devices, in particular to a vibration testing device for a damping detuned blade-wheel disc with a damping block structure. Background technique [0002] As one of the most important parts of turbomachinery, the blade has a very complicated and harsh working environment. High cycle fatigue caused by huge vibration stress is the main reason for blade damage. In actual blades, due to manufacturing errors and wear during use, there are slight physical and geometric differences in the entire circle of blades, which are detuning blades. Detuning blade-wheel disc will produce vibration localization phenomenon, which makes the local blade vibration greatly increase compared with the time of resonance, and generally may reach 2-4 times. The detuning phenomenon poses a great threat to the blade vibration safety. [0003] Due to the loss of periodic symmetry due to detuning, the study of detuning blades must...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G01M7/02G01M13/00
CPCG01M7/02G01M13/00
Inventor 张荻赵伟刘天源谢永慧
Owner XI AN JIAOTONG UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com