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

State monitoring system and wind power generation system provided with same

一种监视系统、状态的技术，应用在风能发电、风力发动机、风力电机组合等方向，能够解决大尺寸、不容易等问题

Inactive Publication Date: 2017-04-19
NTN CORP
View PDF7 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The yaw bearing is set high and generally has a larger size so it is not easy to replace it with another

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
  • State monitoring system and wind power generation system provided with same
  • State monitoring system and wind power generation system provided with same
  • State monitoring system and wind power generation system provided with same

Examples

Experimental program
Comparison scheme
Effect test

no. 2 example

[0111] In the first embodiment described above, the main shaft 20 (including the stopped main shaft 20 ) having the rotational angular velocity ωm within the specified range is defined as the yaw bearing diagnosis, operating state, and therefore, when the wind state (or wind speed) changes frequently , diagnostic parameters may not be adequately collected.

[0112] Therefore, in this second embodiment, the diagnostic parameters collected without imposing conditions on the rotational angular velocity of the main shaft 20 are corrected according to the rotational angular velocity ωm of the main shaft 20, and the failure of the yaw bearing 122 is diagnosed based on the diagnostic parameters. For diagnosis, the influence of the rotation of the main shaft 20 on the diagnosis parameters is suppressed.

[0113] The second embodiment provides a condition monitoring system with an overall configuration, a wind turbine 10 with a configuration, and with the same diagnostic parameters and...

no. 3 example

[0144] Although in the second embodiment, the diagnostic parameters of the yaw bearing 122 are corrected according to the rotational angular velocity ωm of the main shaft 20 , the diagnostic parameters may be corrected according to the amount of electric power generated by the generator 50 instead of the rotational angular velocity ωm of the main shaft 20 . In other words, the change in the amount of electric power generated is linked to the change in the transmission torque acting on the acceleration gear 40 , and also appears as a change in vibration near the yaw bearing 122 . Therefore, in the third embodiment, the diagnostic parameters of the yaw bearing 122 are corrected according to the amount of electric power generated by the generator 50 .

[0145] Correcting the diagnostic parameters of the yaw bearing 122 according to the amount of electric power generated by the generator 50 can be accomplished in a manner similar to that of the second embodiment. In other words, f...

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

A state monitoring system of a wind power generator (10) is provided with: a sensor that detects the state of a yaw bearing; a monitoring apparatus (80) that generates diagnostic parameters on the basis of the detection results from this sensor; a sensor that detects rotation angular velocities of a nacelle and a main shaft; and a data server (330) that diagnoses a fault in the yaw bearing on the basis of the diagnostic parameters. The data server (330) diagnoses whether or not there is a fault in the yaw bearing on the basis of changes in the diagnostic parameters from initial values thereof when the rotation angular velocity of the nacelle falls within a non-zero first predetermined range and the rotation angular velocity of the main shaft falls within a second predetermined range.

Description

technical field [0001] The present invention relates to a condition monitoring system and a wind power generation system comprising the same, and in particular to a condition monitoring system provided for a wind turbine comprising: rotatably supported on a tower The yaw bearing of the nacelle on the top of the frame. Background technique [0002] Japanese Patent Laid-Open No. 2013-185507 (Patent Document 1) discloses a condition monitoring system (CMS) that monitors the condition of mechanical elements of a wind turbine. This state monitoring system receives the signal of the vibration sensor provided on the mechanical element, records for a long time how the amount of the state (hereinafter referred to as the diagnostic parameter) representing the vibration condition in the rated operation changes with time, and based on the increase rate of the diagnostic parameter, Change characteristics, etc., to determine whether a mechanical element has a failure (see Patent Document...

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): F03D7/04F03D17/00
CPCF03D7/0204F05B2240/50F03D17/00F03D80/70Y02E10/72F03D7/042F05D2260/80F03D9/25G01M15/14
Inventor 坂口智也
Owner NTN CORP
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