Conditioning Monitoring of Rotating Equipment
Program Goals
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Elimination of machine breakdowns.
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Able to anticipate and accurately plan for maintenance needs.
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To increase plant production readiness by significantly reducing the chance of a breakdown during operations
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Reduced expenditures for spare parts and labor. Machines that fail while in service often cost ten times as much to repair than if the repair were anticipated and scheduled.
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Predictive maintenance.
Pro-active Maintenance
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Major part of a pro-active program is root cause failure analysis, which is the determination of the mechanisms and causes of machine faults
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Some of the root cause is misalignment, unbalance, or bearing defect.
Vibration Measurement
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Vibration can be considered to be the oscillation or repetitive motion of an object around an equilibrium position.
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Vibration of an object is always caused by an excitation force. This force may be externally applied to the object, or it may originate inside the object.
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Rate (frequency) and magnitude of the vibration of a given object is completely determined by the excitation force, direction, and frequency
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Forces are dependent upon the machine condition, and knowledge of their characteristics and interactions allows one to diagnose a machine problem.
Some Common Machine Problems That Generate Mechanical Vibration Misalignment Unbalance
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Worn belts & pulleys Bearing Defects
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Hydraulic Forces Aerodynamic Forces
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Reaction Forces Reciprocating Forces
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Bent Shafts Rubbing
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Gear Problems Housing Distortion
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Certain Electrical Problems Frictional Forces
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