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 exterior lubrication for use in submersible pumps handling cryogenic gases such as hydrogen and LNG.
NSK has developed particular shaft bearings with a cage created 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 increasing adoption in submersible pumps as a growing number of tasks promote using hydrogen as an vitality source. These initiatives often use special submersible pumps that can reliably pump gaseous and liquid media in continuous or intermittent operation at low temperatures all the means down to round -200°C.
In such pumps, the double bearing of the pump shaft is a critical design element. Corrosion resistance is crucial, and no lubricant can be used apart from the media washing around the bearing. However, this locations powerful calls for on the fabric pairing.
So เกจวัดแรงดันต่ำ has developed a sequence of deep groove ball bearings particularly for these distinctive operating circumstances, and several other key design options provide differentiation from conventional pump bearings. For instance, the inside and outer rings are manufactured from a chrome steel adapted to the particular requirements of rolling bearings.
A stable cage that occupies the whole internal volume of the bearing provides steerage for the rolling parts (also made from stainless steel), while the cage materials, a self-lubricating fluoroplastic, ensures low friction operating of the bearing without external lubrication. In addition, the high-performance fluoroplastic is extremely wear-resistant and presents good low-temperature properties at speeds up to 3600 rpm. The cage has a two-piece design, with the 2 halves joined by chrome steel rivets.
The NSK bearings can be found in various sizes (shaft diameter 30–100 mm) and are designed to be used in each bigger hydrogen pumping services and decentralised functions, similar to hydrogen filling stations.

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