NSK develops self-lubricating rolling bearings

NSK Europe, the European arm of Japanese bearing producer NSK, has developed deep groove ball bearings that don’t require exterior lubrication for use in submersible pumps dealing with cryogenic gases corresponding to hydrogen and LNG.
NSK has developed special shaft bearings with a cage made 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 increasing adoption in submersible pumps as a rising variety of tasks promote the use of hydrogen as an vitality source. These initiatives usually use particular submersible pumps that can reliably pump gaseous and liquid media in continuous or intermittent operation at low temperatures down to around -200°C.
In เกจวัดแรงดันลม10bar , the double bearing of the pump shaft is a crucial design component. Corrosion resistance is crucial, and no lubricant can be utilized other than the media washing around the bearing. However, this places tough calls for on the material pairing.
So NSK has developed a collection of deep groove ball bearings particularly for these exceptional operating circumstances, and several other key design options provide differentiation from typical pump bearings. For instance, the internal and outer rings are manufactured from a stainless steel tailored to the special necessities of rolling bearings.
A stable cage that occupies the whole internal quantity of the bearing offers steerage for the rolling elements (also manufactured from stainless steel), while the cage material, 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 provides good low-temperature properties at speeds up to 3600 rpm. The cage has a two-piece design, with the 2 halves joined by chrome steel rivets.
The NSK bearings are available in various sizes (shaft diameter 30–100 mm) and are designed for use in both larger hydrogen pumping amenities and decentralised functions, similar to hydrogen filling stations.

Leave a Comment