SKF New Bearings for Sub-sea Screw Pumps
SKF has announced the availability of its specialised bearings for sub-sea screw pumps, which help enable oil extraction as low as 3,000m in a single-step process.
Sub-sea screw pumps operate in extreme conditions that test the performance limits of standard steel, journal and magnetic bearings.
The SKF bearing arrangement for each rotor consists of two Carb bearings to accommodate shaft deflection and axial displacement.
A four-point angular contact ball bearing is also used to locate the shaft axially.
The bearings are constructed from a super-tough stainless steel, which features high amounts of nitrogen for superior fatigue and corrosion resistance.
Nowear-coated stainless-steel rolling elements and a specially designed cage contribute to the solution's robustness and reliability to accommodate a range of loads and speeds.
Additionally, this arrangement can be augmented with bearing design upgrades to meet specific application demands.
These include SKF hybrid bearings with ceramic rolling elements to reduce inertial forces and heat.
Special SKF cage designs offer further resistance to corrosive environments and SKF Nowear-coated rolling elements can help reduce friction, while SKF Insocoat offers protection from electric currents.
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