Eureka AIR delivers breakthrough ideas for toughest innovation challenges, trusted by R&D personnel around the world.

Unit top cover bolt online monitoring method and system

A monitoring system and bolt technology, which is applied in the testing of mechanical components, testing of machine/structural components, force measurement, etc., can solve the problem of no foreign matter on the head of the bolt, no bonding on the surface of the bolt, and monitoring the stress of the bolt on the roof of the turbine unit Difficulty and other issues

Active Publication Date: 2021-03-19
DADU RIVER HYDROPOWER DEV +1
View PDF20 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The main purpose of this application is to provide a method and system for on-line monitoring of unit top cover bolts to solve the problem that in the related art, during the installation process of the unit top cover bolts, there must be no foreign matter on the bolt heads, so the surface of the bolts cannot be bonded to the sensor during installation, resulting in It is difficult to monitor the stress of the top cover bolts of the turbine unit

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
  • Unit top cover bolt online monitoring method and system
  • Unit top cover bolt online monitoring method and system
  • Unit top cover bolt online monitoring method and system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0022] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiment of the application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiment of the application. Obviously, the described embodiment is only It is an embodiment of a part of the application, but not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the scope of protection of this application.

[0023] It should be noted that the terms "first" and "second" in the description and claims of the present application and the above drawings are used to distinguish similar objects, but not necessarily used to describe a specific sequence or sequence. It should be understood that the data so used may be interchanged under appropriate circumstances for...

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 unit top cover bolt online monitoring method and system, wherein the unit top cover bolt online monitoring method comprises the steps: enabling the initial stress of a to-be-measured bolt after installation to be unified as a benchmark reference value; monitoring a stress change value of the to-be-measured bolt in real time by adopting an ultrasonic stress monitoring system; when the stress change value is increased, calculating the ratio of the stress change value to the benchmark reference value in real time, and when the ratio exceeds a set bearing threshold value,carrying out overload alarm; and when the stress change value is reduced, calculating the ratio of the stress change value to the benchmark reference value in real time, and when the ratio is lower than a set relaxation early warning threshold value, carrying out relaxation alarm. The problem that in the prior art, foreign matter cannot exist at the head of a bolt in the unit top cover bolt installation process, so that a sensor cannot be bonded to the surface of the bolt in the installation process, and stress of the water turbine unit top cover bolt is difficult to monitor is solved.

Description

technical field [0001] The present application relates to the field of roof bolt monitoring, in particular to a method and system for on-line monitoring of unit roof bolts. Background technique [0002] Compared with the steam turbine, the working fluid density of the hydraulic turbine is higher, and the flow field is more complex. Therefore, the force of the runner chamber of the hydraulic turbine is extremely complicated. The top cover is an important part of the turbine. It is fixed on the upper end of the turbine unit by multiple bolts, mainly to fix the water guiding mechanism and bear the axial load. After long-term use, the bolts of the top cover may become loose or the pre-tightening force is too large, which may cause safety accidents, so the stress of the bolts needs to be monitored. [0003] In the related technology, the online stress monitoring of ordinary bolts, the test result is the absolute value of the load. Since the load distribution of the bolt section ...

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): G01M13/00G01L1/25G01N29/04
CPCG01L1/255G01M13/00G01N29/04G01N2291/02827G01N2291/2691
Inventor 涂扬举李林侯远航钱冰马越梅燕
Owner DADU RIVER HYDROPOWER DEV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
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