NSK Europe, the European arm of Japanese bearing manufacturer NSK, has developed deep groove ball bearings that do not require external lubrication to be used in submersible pumps dealing with 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.
เกจวัดแรงดัน -steel bearings with a cage manufactured from self-lubricating fluoroplastic are seeing growing adoption in submersible pumps as a rising number of tasks promote using hydrogen as an power source. These projects typically use particular submersible pumps that may reliably pump gaseous and liquid media in steady or intermittent operation at low temperatures right down to around -200°C.
In pressure gauge 10 bar , the double bearing of the pump shaft is a important design component. Corrosion resistance is crucial, and no lubricant can be utilized apart from the media washing across the bearing. However, this places powerful calls for on the fabric pairing.
So NSK has developed a sequence of deep groove ball bearings particularly for these distinctive working conditions, and several key design features provide differentiation from conventional pump bearings. For instance, the inside and outer rings are made of a chrome steel tailored to the particular requirements of rolling bearings.
A stable cage that occupies the whole internal quantity of the bearing offers steering for the rolling parts (also made from 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 extremely wear-resistant and provides 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 are available in various sizes (shaft diameter 30–100 mm) and are designed to be used in both larger hydrogen pumping facilities and decentralised applications, such as hydrogen filling stations.
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