VIRTUAL BALANCING EQUIPMENT FOR RIGID ROTORS BY: Ricardo Jaramillo M. Daniel Jaramillo J.

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Presentation transcript:

VIRTUAL BALANCING EQUIPMENT FOR RIGID ROTORS BY: Ricardo Jaramillo M. Daniel Jaramillo J.

BALANCING THEORY VIRTUAL BALANCER

BALANCING DEFINITION Balance: To change the mass distribution of a rotor in such way that the axis of rotation and the axis of inertia coincides. Inertia Axis Rotation Axis UNBALANCED ROTORBALANCED ROTOR Added Weights Rotation and Inertia Axes

SOME CAUSES OF UNBALANCE Excentricities during design or fabrication. Fabrication defects (porosities) Wear, corrosion or dirt. Distortion

HOW IT IS CORRECTED ADDING WEIGHT REMOVING WEIGHT

TYPES OF UNBALANCE STATIC UNBALANCE DYNAMIC UNBALANCE The axes of inertia and rotation are parallel CORRECTED BY ONE PLANE BALANCING PROCEDURE CORRECTED BY TWO PLANE BALANCING PROCEDURE The axes of inertia and rotation are skew W << D W is not << D

PARAMETERS TO MEASURE 1. Angular Velocity. 2. Vibration Amplitude at 1 x RPM. 3. Phase of Vibration at 1 x RPM relative to Rotor. 1 & 3  Strobe light or Photocell. 2 & 3  Acelerometers, sismic pickup and proximity probes

SYSTEM CONFIGURATION

MAIN MENU

ACQUISITION

TRIAL WEIGHTS CALCULATOR

CALCULATING MODULE

AXIAL TRANSLATION

Balance Quality of Rotating Rigid Bodies ISO 1940

PLATES & HOLES CALCULATION

DETAILED REPORT

SYSTEM FEATURES Operating System: Windows 9X Number of VIs : 127 ( 37 from LabVIEW ) Number of Front Panels: 19 Size after compilation: 3 MB LabVIEW Version: 5.1 PC Minimum Requirements: Pentium 100 MHz and 16 MB Ram.