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NSK Europe, the European arm of Japanese bearing manufacturer NSK, has developed deep groove ball bearings that don’t require exterior lubrication to be used in submersible pumps handling cryogenic gases corresponding to hydrogen and LNG.
NSK has developed special shaft bearings with a cage created from self-lubricating fluoroplastic for submersible pumps that deal with cryogenic gases and liquids.
The stainless-steel bearings with a cage made from self-lubricating fluoroplastic are seeing growing adoption in submersible pumps as a growing number of initiatives promote the use of hydrogen as an energy source. These initiatives often use special submersible pumps that may reliably pump gaseous and liquid media in continuous or intermittent operation at low temperatures right down to round -200°C.
In such pumps, the double bearing of the pump shaft is a crucial design component. Corrosion resistance is crucial, and no lubricant can be used aside from the media washing across the bearing. However, this places robust calls for on the fabric pairing.
So NSK has developed a series of deep groove ball bearings particularly for these distinctive working situations, and a variety of other key design options provide differentiation from typical pump bearings. For example, the inside and outer rings are manufactured from a chrome steel tailored to the particular necessities of rolling bearings.
A steady cage that occupies the complete inside volume of the bearing supplies guidance for the rolling elements (also made from stainless steel), while the cage materials, a self-lubricating fluoroplastic, ensures low friction running of the bearing without external lubrication. In addition, the high-performance fluoroplastic is extraordinarily wear-resistant and presents good low-temperature properties at speeds as a lot as 3600 rpm. pressure gauge ดิจิตอล has a two-piece design, with the 2 halves joined by stainless steel rivets.
The NSK bearings are available in various sizes (shaft diameter 30–100 mm) and are designed for use in both larger hydrogen pumping facilities and decentralised functions, such as hydrogen filling stations.
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