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 for use in submersible pumps handling cryogenic gases similar to hydrogen and LNG.
NSK has developed particular shaft bearings with a cage created 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 rising adoption in submersible pumps as a rising variety of tasks promote the utilization of hydrogen as an vitality supply. These initiatives usually use particular submersible pumps that may reliably pump gaseous and liquid media in steady or intermittent operation at low temperatures all the means down to round -200°C.
In such pumps, the double bearing of the pump shaft is a crucial design element. Corrosion resistance is important, and no lubricant can be utilized apart from the media washing across the bearing. However, this places robust calls for on the material pairing.
So NSK has developed a sequence of deep groove ball bearings specifically for these exceptional working conditions, and several other key design features provide differentiation from standard pump bearings. For example, the internal and outer rings are manufactured from a stainless-steel tailored to the particular requirements of rolling bearings.
A stable cage that occupies the entire inside volume of the bearing supplies steerage for the rolling parts (also made from stainless steel), while the cage material, a self-lubricating fluoroplastic, ensures low friction operating of the bearing with out 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 2 halves joined by stainless steel rivets.
เกจวัดแรงดันสูง are available in numerous sizes (shaft diameter 30–100 mm) and are designed to be used in both bigger hydrogen pumping services and decentralised purposes, corresponding to hydrogen filling stations.

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