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 external lubrication for use in submersible pumps dealing with cryogenic gases corresponding to hydrogen and LNG.
NSK has developed particular 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 tasks promote using hydrogen as an power source. These initiatives typically use special submersible pumps that can 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 important design factor. เกรดวัดแรงดัน is essential, and no lubricant can be used aside from the media washing across the bearing. However, this places powerful calls for on the fabric pairing.
So NSK has developed a series of deep groove ball bearings particularly for these distinctive operating conditions, and a number of other key design features present differentiation from standard pump bearings. For example, the inside and outer rings are manufactured from a stainless-steel adapted to the special necessities of rolling bearings.
A steady cage that occupies the whole inner volume of the bearing provides guidance for the rolling elements (also made from stainless steel), whereas 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 up to 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 to be used in each bigger hydrogen pumping facilities and decentralised applications, similar to hydrogen filling stations.

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