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

Testing apparatus for steam turbine blade with shroud ring and boss lashing wire structures

A technology of steam turbine blades and testing devices, which is applied in the field of experimental devices, can solve the problems of insufficient research mechanism, little understanding of performance, and high difficulty of testing, and achieve the effects of simplifying experimental testing methods, convenient height adjustment, and cost saving

Active Publication Date: 2014-04-23
XI AN JIAOTONG UNIV
View PDF4 Cites 17 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main reasons are the following two aspects: on the one hand, the metal damping characteristics under the non-rotating system still need to be further clearly understood, and scholars mainly focus on studying the metal damping characteristics under this system; on the other hand, under the real rotating state Testing the damped vibration characteristics of blades is difficult and expensive
[0004] Based on the above reasons, although the damping shroud and boss pull gold structure have been widely used on blades, the relevant research, especially the mechanism research, is still insufficient, especially for its performance under actual operating conditions. Know little

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
  • Testing apparatus for steam turbine blade with shroud ring and boss lashing wire structures
  • Testing apparatus for steam turbine blade with shroud ring and boss lashing wire structures
  • Testing apparatus for steam turbine blade with shroud ring and boss lashing wire structures

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0032] The present invention will be further described below in conjunction with the accompanying drawings.

[0033] see figure 1 , The present invention has a test device for a steam turbine blade with a shroud and a boss pull gold structure, including a test bench, a blade root fixing device, two sets of loading devices, an exciting device and a measuring device.

[0034] see figure 2, firstly, the steam turbine blade in the test is introduced. The steam turbine blade is composed of a shroud 6 , a boss pull 7 , a blade body 8 and a blade root 9 . When working, under the action of centrifugal force, on the one hand, the blade root 9 and the rim tooth surfaces formed between the two wheel grooves 11 are closely contacted and pressed; The shrouds 6 between two adjacent steam turbine blades and the contact surfaces of the bosses 7 are in contact with each other and pressed tightly. Microscopic or macroscopic slip occurs between the surfaces, thereby dissipating energy and r...

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

Disclosed in the invention is a testing apparatus for steam turbine blade with shroud ring and boss lashing wire structures. The testing apparatus comprises a testing rack, a blade root fixing device, two sets of loading devices, a vibration excitation device, and a measurement device. The blade root fixing device is fixed at a base plate of the testing tack. The loading devices are fixed in groove holes of side plates by two loading plate support units; one set of the loading device is used for providing a circumferential torque for the shroud ring of the turbine blade; and the other set of loading device is used for providing a circumferential torque for the boss lashing wire of the turbine blade. The vibration excitation device is fixed at groove holes of the side plates by two exciter support standing plates. And the measurement device is fixed at the testing rack. According to the invention, the testing apparatus can be used for simulating measurement of steam turbine blades that have different lengths and have the shroud ring and boss lashing wire structures on the actual operation condition, thereby laying the foundation of further development of the steam turbine blade with the shroud ring and boss lashing wire structures.

Description

【Technical field】 [0001] The invention relates to the technical field of experimental devices, in particular to a test device for a steam turbine blade with a shroud and a gold-plated boss structure. 【Background technique】 [0002] As an important power device in the electric power industry, industrial driving force and ship drive, the safety and reliability of the steam turbine are crucial to the national economy and national security. Operating experience shows that blade damage is the main cause of steam turbine accidents, and most blade damage is caused by blade vibration fatigue. [0003] The commonly used method to ensure the safety of blade vibration is to avoid the natural vibration frequency of the blade or increase the vibration damping of the blade. It is an effective method to develop a damping blade with a damping shroud and a boss pull. Dry friction damping is highly nonlinear, and no model can accurately describe all damping characteristics, and little is kno...

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): G01M13/00
Inventor 谢永慧袁瑞山张荻
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