118

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Vibration is a key characteristic of machinery condition. Vibration Monitoring Programs use this relationship to determine when a machine’s condition is “Normal” or “Not Normal”.
Therefore, each point of vibration data requires an accurate alarm level.
How is the correct vibration alarm level determined and which type of alarm should you use?

· fixed alarms based on standards like ISO, NEMA, API or ANSI
· percentage change alarms
· trends
· narrow band alarms
· statistical by point, bearing, machine, direction or machine family

291

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Understanding the basics and fundamentals of vibration analysis are very important in forming a solid background to analyze problems on rotating machinery.

117

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ถึงแม้ Spectrum Analyzer จะมีความสามารถแสดงรูปคลื่นออกทางหน้าจอ เหมือนกับ oscilloscope แต่การทางานที่ความถี่ต่ามากๆ หรือ single shot ดูเหมือนว่า Analyzer จะทางานได้ดีกว่า storage oscilloscope ทั่วไป นอกจากนี้ Analyzer ยังมีฟังก์ชั่นการทางานกับรูปคลื่นที่น่าสนใจ ที่เรียกว่า Correlation ต่อไปนี้จะกล่าวถึงวิธีการว่าเป็นอย่างไร และมีประโยชน์อย่างไรกับการนาไปใช้ในการวิเคราะห์การสั่นสะเทือน

206

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The purpose of this book is to serve as a reference text for the maintenance engineer and technician who are working with state of the art machinery maintenance technology.

147

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For successful diagnostics and trouble shooting of rotating machinery, the Vibration Analyst must ensure accurate and repeatable quality data collection, and have a detailed understanding of the machinery design and operating dynamics to accurately interpret typical fault patterns and symptoms.

173

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This booklet answers some of the basic questions asked by the newcomer to vibration easurement. It gives a brief explanation to the following:
See Page Why do we measure vibration?
Where does it come from?
What is vibration?
How to quantify the vibration level

79

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What Is ODS? •ODS stands for operating deflection shape. •ODS analysis generates a computer model of your machinery that depicts its motion while running at operating speed & load.

107

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Using SPM to trend lubrication condition in rolling element bearings

106

• 18 days ago
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Transient Speed Vibration Analysis Acquisition & analysis of data taken during startup and shut down Provides significant insight into the rotor and structural dynamics that cannot be had with only steady state analysis

81

• 2 months ago
• Size: 1.19 MB
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Our customers often seek help achieving precision alignment of their critical machinery when standard alignment techniques do not provide satisfactory operation. While helping them achieve the simple goal of good hot alignment, we ve identified many mechanical issues using Optical Alignment ( OA ) that were not intuitive to those involved, and were not previously solved using vibration analysis or other techniques.

87

• 3 months ago
• Size: 1.19 MB
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Some of today’s subject items: What kind of monitoring system do we need? What options are available for monitoring systems? Do we need protection? Or do we need only monitoring? What kind of failure modes do we need to monitor? Would it be appropriate to reference any industry standards? What type of monitoring/diagnostic software are we or would we be using? What do we need in a specification to get what we want?

106

• 3 months ago
• Size: 7 MB
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Setting Up A Program

Set Goals
Equipment Survey
Set Up Equipment Specific Analysis Programs
Train Personnel in Sampling Techniques & Report Interpretation
Monitor Results & Progress