NSK develops self-lubricating rolling bearings

NSK Europe, the European arm of Japanese bearing manufacturer NSK, has developed deep groove ball bearings that do not require external lubrication for use in submersible pumps dealing with cryogenic gases such as 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 manufactured from self-lubricating fluoroplastic are seeing growing adoption in submersible pumps as a growing variety of initiatives promote using hydrogen as an energy supply. These tasks often use special submersible pumps that may 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 critical design element. Corrosion resistance is essential, and no lubricant can be used aside from the media washing around the bearing. However, this locations tough calls for on the fabric pairing.
So NSK has developed a collection of deep groove ball bearings specifically for these distinctive operating circumstances, and various other key design options provide differentiation from standard pump bearings. For example, the inner and outer rings are made from a stainless-steel adapted to the particular necessities of rolling bearings.
A secure cage that occupies the entire inside quantity of the bearing supplies steerage for the rolling components (also manufactured from stainless steel), while the cage materials, a self-lubricating fluoroplastic, ensures low friction running of the bearing without exterior lubrication. In addition, the high-performance fluoroplastic is extraordinarily wear-resistant and presents good low-temperature properties at speeds as much as 3600 rpm. The cage has a two-piece design, with the 2 halves joined by chrome steel rivets.
Illegal are available in numerous sizes (shaft diameter 30–100 mm) and are designed for use in each bigger hydrogen pumping facilities and decentralised purposes, corresponding to hydrogen filling stations.
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