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The Importance of Internal Clearances Dr. Barry Erickson Justin Bjork Flowserve Pump Division

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Page 1: Agenda - vibration.org 2006/Cent Pump Internal... · Agenda Purpose End Suction Pumps Double Suction Pumps Multi-Stage Pumps Wear Rings

The Importance of Internal Clearances

Dr. Barry EricksonJustin Bjork

Flowserve Pump Division

AgendaPurposeEnd Suction PumpsDouble Suction PumpsMulti-Stage PumpsWear Rings

Purpose

Suction vs. Discharge PressuresEfficiencyThrust Loads

Suction vs. Discharge Pressures

End Suction Pumps

Vanes to CasingVanes to CoverThermal Expansion

Double Suction Pumps

Offset Wear RingsShuttling Effect

Multi-Stage Pumps

Opposing ImpellersEqual Pressure Loss

A Gap B GapLoose A Gap Eddy Flows =Axial VibrationTight B Gap Vane Passing Cavitation

Page 8: Agenda - vibration.org 2006/Cent Pump Internal... · Agenda Purpose End Suction Pumps Double Suction Pumps Multi-Stage Pumps Wear Rings

Opposing Impellers

Page 9: Agenda - vibration.org 2006/Cent Pump Internal... · Agenda Purpose End Suction Pumps Double Suction Pumps Multi-Stage Pumps Wear Rings

A Gap B Gap

Page 10: Agenda - vibration.org 2006/Cent Pump Internal... · Agenda Purpose End Suction Pumps Double Suction Pumps Multi-Stage Pumps Wear Rings

Vane Passing Cavitation

Wear Rings

Lomakin EffectAlternate Materials

Discussion

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