NSK Europe, the European arm of Japanese bearing producer NSK, has developed deep groove ball bearings that don’t require external 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 handle cryogenic gases and liquids.
The stainless-steel bearings with a cage made of self-lubricating fluoroplastic are seeing growing adoption in submersible pumps as a rising variety of projects promote the utilization of hydrogen as an energy supply. These initiatives usually 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 crucial design factor. Corrosion resistance is crucial, and no lubricant can be used other than the media washing across the bearing. However, เกจวัดแรงดันออกซิเจน for on the material pairing.
So NSK has developed a series of deep groove ball bearings specifically for these exceptional operating circumstances, and a quantity of other key design options provide differentiation from standard pump bearings. For instance, the inside and outer rings are made from a stainless-steel adapted to the particular requirements of rolling bearings.
A secure cage that occupies the entire inner quantity of the bearing offers steering for the rolling components (also made from stainless steel), while the cage material, a self-lubricating fluoroplastic, ensures low friction running of the bearing without external lubrication. In addition, the high-performance fluoroplastic is extraordinarily wear-resistant and presents 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 can be found in various sizes (shaft diameter 30–100 mm) and are designed for use in both bigger hydrogen pumping services and decentralised purposes, corresponding to hydrogen filling stations.
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