Reliability Improvements To A High Pressure, High Temperature, Thirteen Stage Charge Pump
Abstract
Reliability of a high pressure charge pump has been a problem for over 20 years. Unplanned unit outages and sometimes fires accompany pump failures. This paper details the joint effort of the OEM and the user to resolve the problems associated with design and installation. The end result is a pump that has run for three years without incident, without performance decrease, and without vibration increase. OEM recommended hardware improvements include: *Metal to metal head to case fit *Larger diameter stepped shaft with split rings *Spiral groove wear rings and bushing *Remachine bearing housings *Interference fit bundle. User’s specified changes Include: *Metal bellow seal *Integral impeller wear rings *Hard coating wear rings and bushings *Provision for thermal growth control *Reduction of pipe strain. The lessons learned from this case history can be applied to pumps of any manufacture to resolve chronic reliability problems.
Description
Lecturepg. 69
Subject
Pumping machineryCollections
Citation
Johns, Dave A. (1994). Reliability Improvements To A High Pressure, High Temperature, Thirteen Stage Charge Pump. Turbomachinery Laboratories, Department of Mechanical Engineering, Texas A&M University. Available electronically from https : / /hdl .handle .net /1969 .1 /164195.