NSK develops self-lubricating rolling bearings

NSK Europe, the European arm of Japanese bearing manufacturer NSK, has developed deep groove ball bearings that do not require exterior lubrication for use in submersible pumps handling cryogenic gases similar to 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 manufactured from 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 projects often 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 critical design component. Corrosion resistance is important, and no lubricant can be utilized other than the media washing around the bearing. However, this locations powerful demands on the material pairing.
So NSK has developed a collection of deep groove ball bearings specifically for these exceptional working circumstances, and a quantity of other key design features provide differentiation from conventional pump bearings. For เกจวัดแรงดันแก๊สหุงต้ม , the inside and outer rings are made from a chrome steel adapted to the special necessities of rolling bearings.
A stable cage that occupies the whole inner volume of the bearing offers steering for the rolling parts (also made of stainless steel), while the cage materials, a self-lubricating fluoroplastic, ensures low friction working of the bearing without external lubrication. In addition, the high-performance fluoroplastic is extremely wear-resistant and offers 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 can be found in numerous sizes (shaft diameter 30–100 mm) and are designed to be used in both bigger hydrogen pumping amenities and decentralised applications, such as hydrogen filling stations.

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