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

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vibration material for one and all: this is an useful information for those who needs this

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Page 1: Cent Pump Internal Clearances_050506

The Importance of Internal Clearances

Dr. Barry EricksonJustin Bjork

Flowserve Pump Division

Page 2: Cent Pump Internal Clearances_050506

AgendaPurposeEnd Suction PumpsDouble Suction PumpsMulti-Stage PumpsWear Rings

Page 3: Cent Pump Internal Clearances_050506

Purpose

Suction vs. Discharge PressuresEfficiencyThrust Loads

Page 4: Cent Pump Internal Clearances_050506

Suction vs. Discharge Pressures

Page 5: Cent Pump Internal Clearances_050506

End Suction Pumps

Vanes to CasingVanes to CoverThermal Expansion

Page 6: Cent Pump Internal Clearances_050506

Double Suction Pumps

Offset Wear RingsShuttling Effect

Page 7: Cent Pump Internal Clearances_050506

Multi-Stage Pumps

Opposing ImpellersEqual Pressure Loss

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

Page 8: Cent Pump Internal Clearances_050506

Opposing Impellers

Page 9: Cent Pump Internal Clearances_050506

A Gap B Gap

Page 10: Cent Pump Internal Clearances_050506

Vane Passing Cavitation

Page 11: Cent Pump Internal Clearances_050506

Wear Rings

Lomakin EffectAlternate Materials

Page 12: Cent Pump Internal Clearances_050506

Discussion


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