NSK develops self-lubricating rolling bearings

NSK Europe, the European arm of Japanese bearing producer NSK, has developed deep groove ball bearings that do not require exterior lubrication to be used in submersible pumps dealing with cryogenic gases corresponding to hydrogen and LNG.
pressure gauge วัด แรง ดัน น้ำ has developed special 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 rising number of projects promote using hydrogen as an power supply. These tasks typically use particular submersible pumps that may reliably pump gaseous and liquid media in steady or intermittent operation at low temperatures down to round -200°C.
In such pumps, the double bearing of the pump shaft is a critical design element. Corrosion resistance is important, and no lubricant can be used other than the media washing across the bearing. However, this places tough demands on the material pairing.
So NSK has developed a sequence of deep groove ball bearings specifically for these distinctive working situations, and a quantity of other key design features provide differentiation from typical pump bearings. For instance, the internal and outer rings are made of a chrome steel adapted to the particular requirements of rolling bearings.
A steady cage that occupies the complete inside volume of the bearing offers steering for the rolling elements (also made from stainless steel), whereas the cage materials, a self-lubricating fluoroplastic, ensures low friction working of the bearing without external lubrication. In addition, the high-performance fluoroplastic is extremely wear-resistant and offers good low-temperature properties at speeds up to 3600 rpm. The cage has a two-piece design, with the 2 halves joined by stainless steel rivets.
The NSK bearings are available in numerous sizes (shaft diameter 30–100 mm) and are designed to be used in both bigger hydrogen pumping facilities and decentralised purposes, corresponding to hydrogen filling stations.
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