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 handling cryogenic gases such as hydrogen and LNG.
NSK has developed special shaft bearings with a cage produced from self-lubricating fluoroplastic for submersible pumps that handle 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 rising variety of tasks promote using hydrogen as an power supply. These projects 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 important design factor. Corrosion resistance is essential, and no lubricant can be used apart from the media washing across the bearing. However, this places powerful demands on the fabric pairing.
So NSK has developed a series of deep groove ball bearings specifically for these distinctive operating conditions, and a number of other key design features provide differentiation from typical pump bearings. For เกจวัดแรงดันปั๊มลมpuma , the inside and outer rings are manufactured from a stainless steel adapted to the particular requirements of rolling bearings.
A steady cage that occupies the whole internal quantity of the bearing offers steering for the rolling components (also made of stainless steel), while the cage material, a self-lubricating fluoroplastic, ensures low friction operating of the bearing with out external lubrication. In addition, 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 2 halves joined by stainless-steel rivets.
The NSK bearings are available in various sizes (shaft diameter 30–100 mm) and are designed to be used in each larger hydrogen pumping services and decentralised purposes, similar to hydrogen filling stations.

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