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 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 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 growing variety of initiatives promote the usage of hydrogen as an energy supply. These projects often use particular submersible pumps that can 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 crucial design component. Corrosion resistance is crucial, and no lubricant can be used apart from the media washing around the bearing. However, pressure gauge ออก หลัง on the fabric pairing.
So NSK has developed a collection of deep groove ball bearings specifically for these exceptional working circumstances, and several other key design options provide differentiation from conventional pump bearings. For example, the internal and outer rings are made of a stainless steel tailored to the particular requirements of rolling bearings.
A stable cage that occupies the complete internal volume of the bearing offers steerage for the rolling parts (also made of stainless steel), whereas the cage materials, a self-lubricating fluoroplastic, ensures low friction working 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 two halves joined by stainless steel rivets.
The NSK bearings can be found in numerous sizes (shaft diameter 30–100 mm) and are designed for use in both bigger hydrogen pumping facilities and decentralised purposes, such as hydrogen filling stations.

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