NSK Europe, the European arm of Japanese bearing producer NSK, has developed deep groove ball bearings that do not require exterior lubrication for use in submersible pumps dealing with cryogenic gases such as hydrogen and LNG.
NSK has developed special 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 rising variety of initiatives promote using hydrogen as an vitality source. These initiatives typically use particular submersible pumps that can reliably pump gaseous and liquid media in continuous or intermittent operation at low temperatures all the method down to round -200°C.
In such pumps, the double bearing of the pump shaft is a crucial design factor. Corrosion resistance is essential, and no lubricant can be utilized aside from the media washing across the bearing. However, this places powerful calls for on the fabric pairing.
So NSK has developed a collection of deep groove ball bearings particularly for these distinctive working situations, and a quantity of other key design features provide differentiation from conventional pump bearings. For เกจ์วัดแก๊สหุงต้ม , the inner and outer rings are manufactured from a chrome steel tailored to the special necessities of rolling bearings.
A steady cage that occupies the whole inside quantity of the bearing supplies guidance for the rolling parts (also manufactured from stainless steel), whereas the cage materials, a self-lubricating fluoroplastic, ensures low friction operating of the bearing without exterior lubrication. In addition, the high-performance fluoroplastic is extraordinarily wear-resistant and presents good low-temperature properties at speeds as a lot 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 facilities and decentralised functions, similar to hydrogen filling stations.
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