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 for use in submersible pumps dealing with cryogenic gases such as hydrogen and LNG.
NSK has developed special 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 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 power source. These tasks typically use particular submersible pumps that can reliably pump gaseous and liquid media in steady or intermittent operation at low temperatures down to around -200°C.
In such pumps, the double bearing of the pump shaft is a important design element. Corrosion resistance is essential, and no lubricant can be utilized aside from the media washing around the bearing. However, digital pressure gauge ราคา places powerful demands on the fabric pairing.
So NSK has developed a sequence of deep groove ball bearings specifically for these distinctive working conditions, and several other key design features present differentiation from typical pump bearings. For example, the inner and outer rings are made of a stainless-steel adapted to the particular requirements of rolling bearings.
เกจวัดแรงดันถังออกซิเจน that occupies the complete internal volume of the bearing supplies guidance for the rolling elements (also made of stainless steel), whereas the cage material, a self-lubricating fluoroplastic, ensures low friction working of the bearing with out exterior lubrication. In addition, the high-performance fluoroplastic is extraordinarily wear-resistant and provides 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.
The NSK bearings are available in varied sizes (shaft diameter 30–100 mm) and are designed to be used in both larger hydrogen pumping amenities and decentralised functions, corresponding to hydrogen filling stations.

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