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 corresponding to hydrogen and LNG.
NSK has developed special shaft bearings with a cage produced 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 rising variety of initiatives promote the utilization of hydrogen as an energy supply. These initiatives often use special submersible pumps that can reliably pump gaseous and liquid media in steady 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 important design element. Corrosion resistance is crucial, and no lubricant can be utilized other than the media washing across the bearing. However, this places robust demands on the material pairing.
So NSK has developed a sequence of deep groove ball bearings specifically for these distinctive working situations, and various other key design features provide differentiation from typical pump bearings. For pressure gauge , the inner and outer rings are made from a stainless-steel adapted to the particular necessities of rolling bearings.
A stable cage that occupies the whole inner volume of the bearing supplies guidance for the rolling elements (also manufactured from stainless steel), while the cage material, a self-lubricating fluoroplastic, ensures low friction running of the bearing with out exterior lubrication. In หลักการทำงานของเกจ์วัดแก๊ส , the high-performance fluoroplastic is extremely wear-resistant and offers good low-temperature properties at speeds up to 3600 rpm. The cage has a two-piece design, with the two halves joined by stainless-steel rivets.
The NSK bearings are available in numerous sizes (shaft diameter 30–100 mm) and are designed to be used in both larger hydrogen pumping services and decentralised purposes, corresponding to hydrogen filling stations.

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