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 similar to hydrogen and LNG.
NSK has developed particular shaft bearings with a cage produced 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 rising adoption in submersible pumps as a growing variety of initiatives promote using hydrogen as an energy supply. เกจ์แรงดัน use particular submersible pumps that can 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 element. ตัววัดแรงดันน้ำ is crucial, and no lubricant can be utilized aside from the media washing around the bearing. However, this places robust calls for on the material pairing.
So NSK has developed a series of deep groove ball bearings specifically for these exceptional working conditions, and several key design options provide differentiation from conventional pump bearings. For instance, the inside and outer rings are made of a chrome steel tailored to the special necessities of rolling bearings.
A secure cage that occupies the whole inside volume of the bearing offers steering for the rolling parts (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 provides good low-temperature properties at speeds up to 3600 rpm. The cage has a two-piece design, with the two halves joined by chrome steel rivets.
The NSK bearings can be found in varied sizes (shaft diameter 30–100 mm) and are designed for use in each larger hydrogen pumping amenities and decentralised functions, similar to hydrogen filling stations.
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