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 similar to hydrogen and LNG.
NSK has developed particular shaft bearings with a cage created from self-lubricating fluoroplastic for submersible pumps that deal with 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 number of initiatives promote the usage of hydrogen as an vitality supply. These initiatives typically use special submersible pumps that can 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 element. Corrosion resistance is essential, and no lubricant can be used other than the media washing around the bearing. However, เพชเชอร์เกจ for on the fabric pairing.
So NSK has developed a sequence of deep groove ball bearings specifically for these exceptional operating situations, and several key design options present differentiation from standard pump bearings. For instance, the internal and outer rings are made of a chrome steel adapted to the special necessities of rolling bearings.
A secure cage that occupies the entire inner quantity of the bearing provides guidance for the rolling elements (also made of stainless steel), while the cage material, a self-lubricating fluoroplastic, ensures low friction working 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 up to 3600 rpm. เกจวัดแรงดันco2 has a two-piece design, with the two 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 facilities and decentralised applications, corresponding to hydrogen filling stations.
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