NSK Europe, the European arm of Japanese bearing producer NSK, has developed deep groove ball bearings that don’t require exterior lubrication for use in submersible pumps handling cryogenic gases corresponding to hydrogen and LNG.
NSK has developed special shaft bearings with a cage produced 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 rising adoption in submersible pumps as a rising number of tasks promote the utilization of hydrogen as an power supply. These initiatives often 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 important design factor. Corrosion resistance is important, and no lubricant can be used aside from the media washing across the bearing. However, this places robust calls for on the material pairing.
So NSK has developed a collection of deep groove ball bearings particularly for these distinctive operating situations, and a quantity of other key design features present differentiation from typical pump bearings. For instance, the inside and outer rings are made of a chrome steel adapted to the special requirements of rolling bearings.
A steady cage that occupies the whole inside volume of the bearing provides guidance for the rolling components (also made of stainless steel), whereas the cage material, a self-lubricating fluoroplastic, ensures low friction operating of the bearing without exterior lubrication. In addition, the high-performance fluoroplastic is extraordinarily 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 stainless steel rivets.
weksler pressure gauge ราคา are available in numerous sizes (shaft diameter 30–100 mm) and are designed for use in both larger hydrogen pumping facilities and decentralised applications, such as hydrogen filling stations.