NSK Europe, the European arm of Japanese bearing manufacturer NSK, has developed deep groove ball bearings that do not require external lubrication for use in submersible pumps dealing with cryogenic gases such as hydrogen and LNG.
เกจวัดแรงดันออกซิเจนราคา has developed particular shaft bearings with a cage made 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 increasing adoption in submersible pumps as a growing number of tasks promote the usage of hydrogen as an energy source. These projects typically use particular submersible pumps that may 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 critical design component. Corrosion resistance is important, and no lubricant can be used other than the media washing around the bearing. However, this locations powerful calls for on the fabric pairing.
So NSK has developed a sequence of deep groove ball bearings specifically for these distinctive operating circumstances, and several key design features provide differentiation from standard pump bearings. For example, the inner and outer rings are manufactured from a chrome steel tailored to the special necessities of rolling bearings.
A secure cage that occupies the complete inner volume of the bearing offers steering for the rolling components (also made of stainless steel), whereas the cage materials, a self-lubricating fluoroplastic, ensures low friction operating of the bearing without exterior lubrication. In addition, the high-performance fluoroplastic is extremely 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 chrome steel rivets.
The NSK bearings can be found in numerous sizes (shaft diameter 30–100 mm) and are designed for use in each bigger hydrogen pumping facilities and decentralised purposes, such as hydrogen filling stations.
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