ABNORMALITY DIAGNOSTIC DEVICE FOR ROLLING BEARING, WIND TURBINE GENERATION APPARATUS AND ABNORMALITY DIAGNOSTIC SYSTEM
First Claim
1. An abnormality diagnostic device for a rolling bearing, comprising:
- a vibration sensor for measuring a vibration waveform of the rolling bearing; and
a processing unit for diagnosing an abnormality of said rolling bearing,said processing unit includinga first operation unit calculating an effective value of said vibration waveform measured by using said vibration sensor,an envelope processing unit generating an envelope waveform of said vibration waveform by performing envelope processing on said vibration waveform measured by using said vibration sensor,a second operation unit calculating an effective value of an AC component of said envelope waveform generated by said envelope processing unit, anda diagnostic unit diagnosing the abnormality of said rolling bearing based on the effective value of said vibration waveform calculated by said first operation unit and the effective value of the AC component of said envelope waveform calculated by said second operation unit.
1 Assignment
0 Petitions
Accused Products
Abstract
An effective value operation unit calculates an effective value of a vibration waveform of a hearing, the vibration waveform being measured by using a vibration sensor. An envelope processing unit performs envelope processing on the vibration waveform measured by using the vibration sensor, thereby generating an envelope waveform of the vibration waveform. An effective value operation unit calculates an effective value of an AC component of the envelope waveform generated by the envelope processing unit. A diagnostic unit diagnoses an abnormality of the bearing based on the effective value of the vibration waveform calculated by the effective value operation unit and the effective value of the AC component of the envelope waveform calculated by the effective value operation unit.
-
Citations
15 Claims
-
1. An abnormality diagnostic device for a rolling bearing, comprising:
-
a vibration sensor for measuring a vibration waveform of the rolling bearing; and a processing unit for diagnosing an abnormality of said rolling bearing, said processing unit including a first operation unit calculating an effective value of said vibration waveform measured by using said vibration sensor, an envelope processing unit generating an envelope waveform of said vibration waveform by performing envelope processing on said vibration waveform measured by using said vibration sensor, a second operation unit calculating an effective value of an AC component of said envelope waveform generated by said envelope processing unit, and a diagnostic unit diagnosing the abnormality of said rolling bearing based on the effective value of said vibration waveform calculated by said first operation unit and the effective value of the AC component of said envelope waveform calculated by said second operation unit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
-
-
14. A wind turbine generation apparatus comprising:
-
a blade receiving wind force; a main shaft connected to said blade; a generator connected to one of said main shaft and a gearbox for accelerating rotation of said main shaft; a plurality of rolling bearings provided in said main shaft, said gearbox and said generator; and an abnormality diagnostic device diagnosing an abnormality of at least one of said plurality of rolling bearings, said abnormality diagnostic device including a vibration sensor for measuring a vibration waveform of a rolling bearing to be diagnosed, and a processing unit for diagnosing an abnormality of the rolling bearing to be diagnosed, said processing unit including a first operation unit calculating an effective value of said vibration waveform measured by using said vibration sensor, an envelope processing unit generating an envelope waveform of said vibration waveform by performing envelope processing on said vibration waveform measured by using said vibration sensor, a second operation unit calculating an effective value of an AC component of said envelope waveform generated by said envelope processing unit, and a diagnostic unit diagnosing the abnormality of said rolling bearing based on the effective value of said vibration waveform calculated by said first operation unit and the effective value of the AC component of said envelope waveform calculated by said second operation unit.
-
-
15. An abnormality diagnostic system comprising:
-
a wind turbine generation apparatus; an abnormality diagnostic device provided at a different position from said wind turbine generation apparatus; and a communications device for establishing communications between said wind turbine generation apparatus and said abnormality diagnostic device, said wind turbine generation apparatus including a blade receiving wind force, a main shaft connected to said blade, a generator connected to one of said main shaft and a gearbox for accelerating rotation of said main shaft, a plurality of rolling bearings provided in said main shaft, said gearbox and said generator, a vibration sensor for measuring a vibration waveform of at least one of said plurality of rolling bearings, and a data processing unit performing primary processing on the vibration waveform measured by using said vibration sensor, said data processing unit including a first operation unit calculating an effective value of said vibration waveform measured by using said vibration sensor, an envelope processing unit generating an envelope waveform of said vibration waveform by performing envelope processing on said vibration waveform measured by using said vibration sensor, and a second operation unit calculating an effective value of an AC component of said envelope waveform generated by said envelope processing unit, said abnormality diagnostic device diagnosing an abnormality of a rolling bearing to be diagnosed based on the effective value of said vibration waveform and the effective value of the AC component of said envelope waveform received from said data processing unit of said wind turbine generation apparatus through said communications device.
-
Specification