Cent pump internal clearances 05 2006

The Importance of Internal Clearances Dr Barry Erickson Justin Bjork Flowserve Pump Division Agenda Purpose End Suction Pumps Double Suction Pumps Multi-Stage Pumps Wear Rings Purpose Suction vs Discharge Pressures Efficiency Thrust Loads Suction vs Discharge Pressures End Suction Pumps Vanes to Casing Vanes to Cover Thermal Expansion Double Suction Pumps Offset Wear Rings Shuttling Effect Multi-Stage Pumps Opposing Impellers Equal Pressure Loss A Gap B Gap Loose A Gap Eddy Flows =Axial Vibration Tight B Gap Vane Passing Cavitation Opposing Impellers A Gap B Gap Vane Passing Cavitation Wear Rings Lomakin Effect Alternate Materials Discussion ... Purpose End Suction Pumps Double Suction Pumps Multi-Stage Pumps Wear Rings Purpose Suction vs Discharge Pressures Efficiency Thrust Loads Suction vs Discharge Pressures End Suction Pumps Vanes to... Pumps Vanes to Casing Vanes to Cover Thermal Expansion Double Suction Pumps Offset Wear Rings Shuttling Effect Multi-Stage Pumps Opposing Impellers Equal Pressure Loss A Gap B Gap Loose A Gap