For the past 20 years, the industry has steadily improved its predictive processes and methods and the tools used to do them. Especially, the vibration analysis technology that we’ve been talking about since last week is way beyond what we expected. But more often than you think, we don’t know this technology very well. So I’m going to sort out the ABCs of vibration analysis.
Disability detected by vibration analysis technology
From a theoretical point of view, vibration analysis technology can detect almost any failure that may occur on the device or facility under monitoring. It’s a theoretical point of view.^^). Therefore, it is often necessary to supplement the diagnosis using vibration analysis technology. However, it is known that the following items of failure can be pinpointed by vibration analysis without any other supplementary means.
1. Device imbalance
2. Bearing Failure
3. Poor tightening and loose device
5. Resonance and Natural Frequency
6. Motor electrical failure
7. Shaft bent
8. Gearbox failure
9. Cavitation in pumps
10. Critical Speeds
Fundamentals of Vibration Analysis
Vibration analysis has a great advantage in maintaining business continuity because the target device does not need to be dismantled or stopped. It’s easy to understand if you estimate the cost of loss that can happen when you stop the production process even for a moment. A key principle of vibration analysis is that the sensor transforms the movement of the device into an electrical signal. The Vibration Analyzer then calculates all predefined parameters and stores them as signals.
Vibration Analysis Sensor
The most commonly used sensor for vibration analysis is the Accelerometer, but speed transducers and displacement sensors are also frequently used. In fact, the accelerometers provide a voltage output that is proportional to the acceleration of the oscillation. The vibration analyser then incorporates signals together to obtain speed data and displacement data that greatly widens accelerometer applications.
What is Vibration?
Rotation devices produce vibration under normal operating conditions due to rotating parts, bearing friction and centrifugal force. Of course, the vibrations that occur are measured and recorded, and the patterns are recognizable. And you can hear it in many cases. So, vibration can be defined as a repetitive motion around the equilibrium, characterized by amplitude and frequency changing. And two factors, amplitude and frequency, are used in numerous calculations for fault diagnosis.
waveform image (모빌리오)
진폭은 진동이 생기는 최대 범위를 의미하죠. 그리고 파형(Waveform)의 최저점부터 최고점까지의 범위를 측정합니다. 사실 진폭은 이동 범위와 밀접하게 연계되어 있습니다. 반면, RMS(Root Mean Square)값은 이 진동에 포함된 에너지의 양을 의미합니다. RMS는 진동의 강도를 측정하는 데 가장 많이 사용되는 매개 변수입니다.
Amplitude image (모빌리오)
다음 포스트에서는 진동 분석 기술과 관련된 Frequency, FFT (Fast Fourier Transform) 및 진동 측정의 매개 변수 (parameter) 등을 정리해보겠습니다.
(주)모빌리오는 예지보전솔루션 전문 기업입니다.
Mobilio is an engineering company for the Predictive Maintenance Solution(주)모빌리오는 스마트 팩토리와 스마트 빌딩의 최적화된 운영.관리를 위한 예지보전 솔루션을 제공해 드립니다. Mobilio is an engineering company providing solutions and services for the predictive maintenance.www.mobilio.io