NSK Europe, the European arm of Japanese bearing manufacturer NSK, has developed deep groove ball bearings that do not require exterior lubrication to be used in submersible pumps handling cryogenic gases such as hydrogen and LNG.
จำหน่ายเกจวัดแรงดัน has developed special shaft bearings with a cage created 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 growing adoption in submersible pumps as a rising number of initiatives promote the use of hydrogen as an energy source. These projects usually use particular submersible pumps that can reliably pump gaseous and liquid media in steady or intermittent operation at low temperatures down to around -200°C.
In such pumps, the double bearing of the pump shaft is a important design factor. Corrosion resistance is essential, and no lubricant can be used other than the media washing around the bearing. However, this places powerful calls for on the material pairing.
So NSK has developed a series of deep groove ball bearings particularly for these exceptional operating conditions, and several key design features provide differentiation from typical pump bearings. For instance, the inside and outer rings are made from a stainless-steel tailored to the particular necessities of rolling bearings.
A steady cage that occupies the entire inner quantity of the bearing supplies guidance for the rolling elements (also manufactured from stainless steel), while 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 provides good low-temperature properties at speeds as much as 3600 rpm. The cage has a two-piece design, with the two halves joined by stainless steel rivets.
The NSK bearings are available in varied sizes (shaft diameter 30–100 mm) and are designed for use in both bigger hydrogen pumping amenities and decentralised purposes, such as hydrogen filling stations.
Share