NSK develops self-lubricating rolling bearings

NSK Europe, the European arm of Japanese bearing manufacturer NSK, has developed deep groove ball bearings that don’t require external lubrication to be used in submersible pumps dealing with cryogenic gases similar to hydrogen and LNG.
NSK has developed particular shaft bearings with a cage made from self-lubricating fluoroplastic for submersible pumps that handle cryogenic gases and liquids.
The stainless-steel bearings with a cage made of self-lubricating fluoroplastic are seeing rising adoption in submersible pumps as a growing number of initiatives promote the use of hydrogen as an energy source. These tasks usually use particular submersible pumps that can reliably pump gaseous and liquid media in continuous or intermittent operation at low temperatures down to round -200°C.
In such pumps, the double bearing of the pump shaft is a crucial design component. Corrosion resistance is important, and no lubricant can be used aside from the media washing across the bearing. However, this locations powerful demands on the material pairing.
So NSK has developed a series of deep groove ball bearings specifically for these exceptional working circumstances, and several key design features provide differentiation from typical pump bearings. For example, the inner and outer rings are made of a stainless-steel adapted to the special requirements of rolling bearings.
A stable cage that occupies the entire inner quantity of the bearing supplies steering for the rolling elements (also made of stainless steel), whereas the cage materials, a self-lubricating fluoroplastic, ensures low friction running of the bearing with out exterior lubrication. In เกจวัดความดันน้ำ , the high-performance fluoroplastic is extraordinarily wear-resistant and provides good low-temperature properties at speeds as much as 3600 rpm. The cage has a two-piece design, with the two halves joined by stainless-steel rivets.
The NSK bearings can be found in varied sizes (shaft diameter 30–100 mm) and are designed to be used in each larger hydrogen pumping amenities and decentralised purposes, similar to hydrogen filling stations.

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