NSK Europe, the European arm of Japanese bearing producer NSK, has developed deep groove ball bearings that don’t require external lubrication for use in submersible pumps handling cryogenic gases such as hydrogen and LNG.
เกจวัดแรงดันลมคือ has developed particular 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 made of self-lubricating fluoroplastic are seeing growing adoption in submersible pumps as a growing variety of tasks promote the use of hydrogen as an vitality supply. These initiatives typically use special submersible pumps that can reliably pump gaseous and liquid media in continuous 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 important design factor. Corrosion resistance is essential, and no lubricant can be used aside from the media washing across the bearing. However, this places powerful demands on the material pairing.
So NSK has developed a collection of deep groove ball bearings specifically for these exceptional working conditions, and a quantity of other key design features provide differentiation from standard pump bearings. For instance, the inside 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 steering for the rolling elements (also made from stainless steel), while 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 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 various sizes (shaft diameter 30–100 mm) and are designed for use in both larger hydrogen pumping services and decentralised applications, similar to hydrogen filling stations.
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