PRODUCTION • PROCESSING • HANDLING
Polymer bearings typically have a maximum operating temperature of 200°C (392°F); beyond this, polymer loses strength and therefore load capacity. An added benefit of polymer in applications involving electric motors and generators is its insulating property, which prevents stray shaft currents from transmitting through the bearing, eliminating the need for an insulating layer between the bearing and its housing.
HARSH ENVIRONMENTS
Te need for high bearing load capacity at still higher operating temperatures, as in steam-assisted gravity drainage (SAGD) applications, is met by the use of ceramic/cermet materials such as certain grades of silicon carbide and tungsten carbide. Tese materials retain high strength at temperatures of 300°C (572°F) and higher. Tey can also accommodate minor amounts of abrasives, such as sand, in the lubricating fluid without surface damage, thereby improving bearing reliability in such harsh environments. When there is a relatively large amount of
abrasives in the lubricant and/or when the lubricant is a multiphase fluid, a super-hard bearing material such as PCD provides a robust bearing surface for reliable operation. PCD bearings offer superior wear resistance when compared to ceramics. Because they can use the process fluid as a lubricant, they can
Moving Energy Forward Ideal solutions for off shore, upstream, midstream and downstream
As an expert manufacturer of downhole and surface pumps, we produce oilfi eld pump systems according to the highest quality standards. The viscosity of your crude oil or its percentage of gas or sand makes no diff erence to the NETZSCH progressing cavity pumps, our helical rotor system is unbeatable.
NEMO® High Flow Transfer Pump
potentially eliminate the need for shaft end seals and lubricating systems in certain applications. Te best material choice for fluid film bearings is application dependent, and material alone will not guarantee performance. Te selected material(s) must be paired with an appropriate and optimised bearing design to provide the longest life and optimal performance. l
For more information ✔ at
www.engineerlive.com/iog
Sriram Venkatesan is a senior development engineer at Waukesha Bearings.
www.waukeshabearings.com
Polycrystalline diamond (PCD) tilt pad thrust bearing and collar
NETZSCH Pumpen & Systeme GmbH
Business Field Oil & Gas Geretsrieder Str. 1 84478 Waldkraiburg, Germany Tel.: +49 8638 63-0 Fax: +49 8638 67981
info.nps@
netzsch.com www.netzsch.com
For more information ✔ at
www.engineerlive.com/iog
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