Wind power generation equipment

The contact strength monitoring device addresses the issue of varying contact strength in wind power generation devices by analyzing vibration and rotational speed data to determine contact strength, thereby enhancing operational reliability and extending bearing life.

JP7655119B2Active Publication Date: 2025-04-02NSK LTD
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Patent Information

Application Number
JP2021112987
Authority / Receiving Office
JP · JP
Patent Type
Patents
Current Assignee / Owner
Filing Date
2021-07-07
Publication Date
2025-04-02
Estimated Expiration
2041-07-07

AI Technical Summary

Technical Problem

In wind power generation devices, the intermittent fluctuations in rotational speed and load cause variations in the contact strength between rolling elements and other components of the rolling bearings, leading to potential operational defects and reduced bearing life.

Method used

A contact strength monitoring device that acquires vibration information and rotational speed data from rolling bearings during operation, sets vibration frequencies of interest based on rotational speed, derives vibration values, and determines contact strength by comparing these values with predetermined threshold values.

Benefits of technology

Enables real-time monitoring of contact strength between rolling bearing components, allowing for early detection of potential defects and improving the operational reliability and longevity of wind power generation devices.

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Abstract

To monitor a contact strength between components occurring inside a rolling bearing in rotation.SOLUTION: A monitoring device of a contact strength monitors a contact strength of components inside a rolling bearing. The monitoring device includes: first acquisition means configured to acquire vibration information of the rolling bearing in rotation; second acquisition means configured to acquire a rotation speed of the rolling bearing in rotation; setting means configured to set a vibration frequency to be focused according to the rotation speed; derivation means configured to use the vibration information to derive a vibration value of the vibration frequency set at the setting means; and determination means configured to determine a contact strength between the components inside the rolling bearing according to the vibration value derived at the derivation means and a prescribed threshold value.SELECTED DRAWING: Figure 6
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