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 to be used in submersible pumps handling cryogenic gases such as hydrogen and LNG.
NSK has developed particular shaft bearings with a cage produced from self-lubricating fluoroplastic for submersible pumps that deal with 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 rising number of initiatives promote the use of hydrogen as an vitality source. These projects typically use special submersible pumps that can reliably pump gaseous and liquid media in steady or intermittent operation at low temperatures all the way down to round -200°C.
In such pumps, the double bearing of the pump shaft is a important design component. Corrosion resistance is important, and no lubricant can be utilized aside from the media washing across the bearing. However, this places tough calls for on the material pairing.
So NSK has developed a sequence of deep groove ball bearings specifically for these exceptional working situations, and several key design options present differentiation from conventional pump bearings. For เกจวัดแรงลม , the inner and outer rings are made from a stainless-steel tailored to the special necessities of rolling bearings.
A stable cage that occupies the entire internal volume of the bearing provides steerage for the rolling elements (also manufactured from stainless steel), while the cage materials, a self-lubricating fluoroplastic, ensures low friction operating of the bearing without external lubrication. In addition, the high-performance fluoroplastic is extraordinarily wear-resistant and presents good low-temperature properties at speeds as much as 3600 rpm. The cage has a two-piece design, with the two halves joined by chrome steel rivets.
The NSK bearings are available in numerous sizes (shaft diameter 30–100 mm) and are designed to be used in both bigger hydrogen pumping services and decentralised functions, similar to hydrogen filling stations.

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