NSK develops self-lubricating rolling bearings

NSK Europe, the European arm of Japanese bearing manufacturer NSK, has developed deep groove ball bearings that don’t require external lubrication for use in submersible pumps handling cryogenic gases such as hydrogen and LNG.
NSK has developed particular shaft bearings with a cage made 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 growing variety of initiatives promote the utilization of hydrogen as an energy source. These initiatives often use special submersible pumps that may reliably pump gaseous and liquid media in continuous or intermittent operation at low temperatures all the way down to around -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 utilized aside from the media washing across the bearing. However, this places powerful calls for on the fabric pairing.
So NSK has developed a series of deep groove ball bearings specifically for these distinctive operating circumstances, and several key design features provide differentiation from typical pump bearings. For instance, the internal and outer rings are made of a stainless steel tailored to the special necessities of rolling bearings.
เกจวัดแก๊สหุงต้ม that occupies the complete inner volume of the bearing supplies steering 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 extremely wear-resistant and offers good low-temperature properties at speeds up to 3600 rpm. เกจวัดแรงดัน1บาร์ has a two-piece design, with the 2 halves joined by stainless-steel rivets.
The NSK bearings are available in numerous sizes (shaft diameter 30–100 mm) and are designed for use in both bigger hydrogen pumping facilities and decentralised applications, similar to hydrogen filling stations.

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