Vibration Institute Mini-Conference Agenda

Time Period

Presentation

8:00 am – 9:00 am

 

“Case Studies: Vibration Analysis of Vertical Pumps in the Municipal Wastewater Industry”, Robert J. Sayer, PE Applied Structural Dynamics

Abstract: Sludge pumps used for the transportation of raw sewage at wastewater treatment plants or for booster applications along a wastewater distribution system typically are designed with a small number of vanes and operate at a relatively low speed.  Vertically mounted single-stage centrifugal pumps are the most common type used for this application.  These pumps are usually supported on a foundation in a dry well and driven by a motor located at an elevation significantly higher than the pump (10 – 20 meters).  A drive shaft is supplied between the motor and the pump and typically coupled thereto using universal joints or other flexible methods.  The combination of lower speeds with lower vane count results in vane-pass pulsation frequencies that can potentially align with natural frequencies of the motor pedestal, drive shaft and/or pump foundation.  Two separate cases will be used to demonstrate potential resonance issues with these types of pumps and will include the discussion of corrective action plans developed to minimize resonance issues. 

9:15 am – 10:15 am

 

"Understanding Balancing Specifications ISO 21940-1", Jack Peters, Accelent Technology, LLC

Abstract: We are often presented with well-intended specifications and standards that can be difficult to interpret or understand. This presentation will attempt to unravel some of the mysteries of ISO 21940-11 for balancing rigid rotors. Both American Customary units (inch, pound, second) and Scientific International units (millimeter, gram, second) will be discussed. Eccentricity of the gravitational center, permissible unbalance and permissible vibration will be explained relative to the standard. This presentation will try to provide the user with a better overall understanding of the charts, specifications and calculations to assist them in meeting customer expectations relative to balancing.

10:30 am – Noon

 

"Introduction to Vibration Video Amplification with Case Studies", Charles Scott, Vice President, Visual Inspection Systems, LLC 

Abstract: See how Motion Amplification helped the VIS team identify some difficult issues and problems for their clients. We will explore structural as well as reciprocating assets from actual jobs to learn how Motion Amplification was used to identify the root cause and facilitate recommended action.

Noon – 1 pm

Lunch (Provided)

1:00 pm – 2:00 pm

 

‘Principles of Vibration Isolation”, Shannon Sweeney, Penn State Behrend Campus

Abstract: For much of the constituency of The Vibration Institute, the overarching goal is to eliminate unwanted vibration at the source. The goal of this presentation is to concisely present the theory and practice of vibration suppression for unwanted vibration that cannot be eliminated at the source (i.e., engines). The theory of suppression by isolation, damping and absorption will be discussed. The practice of suppression with elastomeric and hydraulic products will be discussed. Time permitting, vibration from common engine configurations will be discussed along with an introduction to torsional vibration.

2:15 pm – 3:15 pm

 

"Window Filter Effects and Calculating the RMS Energy of the FFT ", Jack Peters, Accelent Technology, LLC

Abstract: The Fast Fourier Transform (FFT) is used in vibration analysis. It is well known that Window Filters (Hanning, Flat Top, etc.) can be applied to the time waveform during the batch processing of the FFT, and as a result, decrease the resolution of the FFT. The resolution is decreased by a numerical Window Factor based on the applied filter. It is not well known that the Window Factor (WF) can also be described as the Equivalent Noise Bandwidth (ENBW) or Noise Power Bandwidth. This presentation will explain how to calculate the RMS Energy of the FFT when the WF or ENBW used to process the FFT has a numerical value greater than one.

3:30 pm – 5 pm

 

“How Much Vibration is Too Much; The Relationship Between Vibration and Fatigue”, Robert J. Sayer, PE, Applied Structural Dynamics

Abstract: It has long been recognized that vibration can adversely affect the reliability of mechanical equipment.  Increased vibration typically results in increased stresses which can lead to fatigue failures.  This presentation will track the evolution of severity criteria for rotating equipment and fixed assets (piping, structures and ducts).   

Total Number of CEUs: 0.8

Member Pricing: $150.00

Non Member Pricing: $250.00

Course Attendees registered for CAT I - Intro to Machinery Vibrations or Vibration Diagnostics Using Case Studies may attend for FREE

Peek'n Peak Resort - Clymer, NY

Online Registration has closed at this time to book your room.  Please call the resort and mention you are with the Vibration Institute when booking: 1-866-377-5274 option 2

Vibration Institute Fall Mini-Conference

  • September 27, 2021
  • 1405 Olde Road
    Clymer, New York
    United States
    14724