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 dealing with 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 deal with cryogenic gases and liquids.
The stainless-steel bearings with a cage made of self-lubricating fluoroplastic are seeing increasing adoption in submersible pumps as a growing number of projects promote the use of hydrogen as an vitality supply. These tasks often use special submersible pumps that may reliably pump gaseous and liquid media in steady or intermittent operation at low temperatures right down to around -200°C.
In such pumps, the double bearing of the pump shaft is a crucial design component. เกจวัดแรงดันน้ำ10บาร์ is crucial, and no lubricant can be used other than the media washing around the bearing. However, this locations robust calls for on the material pairing.
So NSK has developed a series of deep groove ball bearings particularly for these distinctive operating circumstances, and several other key design features 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 whole inner quantity of the bearing offers guidance for the rolling components (also made from stainless steel), whereas the cage material, a self-lubricating fluoroplastic, ensures low friction operating of the bearing with out exterior lubrication. In addition, the high-performance fluoroplastic is extremely wear-resistant and provides good low-temperature properties at speeds up to 3600 rpm. The cage has a two-piece design, with the two halves joined by chrome steel rivets.
The NSK bearings can be found in varied sizes (shaft diameter 30–100 mm) and are designed for use in both larger hydrogen pumping amenities and decentralised functions, similar to hydrogen filling stations.

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