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 dealing with cryogenic gases corresponding to hydrogen and LNG.
NSK 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 using hydrogen as an energy supply. These tasks often use special submersible pumps that can reliably pump gaseous and liquid media in continuous or intermittent operation at low temperatures all the method down to round -200°C.
In such pumps, the double bearing of the pump shaft is a important design factor. ตัววัดแรงดันน้ำมัน is essential, and no lubricant can be utilized other than the media washing around the bearing. However, this locations powerful calls for on the material pairing.
So NSK has developed a series of deep groove ball bearings particularly for these exceptional working conditions, and several key design features present differentiation from conventional pump bearings. For example, the inner and outer rings are made of a stainless-steel adapted to the particular requirements of rolling bearings.
A stable cage that occupies the whole inner volume of the bearing provides guidance for the rolling components (also made from stainless steel), whereas the cage material, a self-lubricating fluoroplastic, ensures low friction running of the bearing without external lubrication. In addition, the high-performance fluoroplastic is extraordinarily wear-resistant and presents 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 can be found in numerous sizes (shaft diameter 30–100 mm) and are designed to be used in each bigger hydrogen pumping amenities and decentralised functions, corresponding to hydrogen filling stations.
Share