NSK Europe, the European arm of Japanese bearing producer 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.
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 from self-lubricating fluoroplastic are seeing growing adoption in submersible pumps as a growing variety of tasks promote the use of hydrogen as an power supply. These projects usually use particular submersible pumps that may reliably pump gaseous and liquid media in continuous or intermittent operation at low temperatures down to around -200°C.
In such pumps, the double bearing of the pump shaft is a critical design element. Corrosion resistance is essential, and no lubricant can be utilized apart from the media washing across the bearing. However, this locations powerful demands on the material pairing.
So NSK has developed a collection of deep groove ball bearings particularly for these exceptional operating conditions, and several key design options present differentiation from typical pump bearings. For instance, the inside and outer rings are made of a chrome steel tailored to the particular requirements of rolling bearings.
A secure cage that occupies the complete internal quantity of the bearing provides steering for the rolling elements (also manufactured from stainless steel), while the cage material, a self-lubricating fluoroplastic, ensures low friction running of the bearing with out external lubrication. In addition, the high-performance fluoroplastic is extremely wear-resistant and offers good low-temperature properties at speeds up to 3600 rpm. The cage has a two-piece design, with the 2 halves joined by chrome steel rivets.
เกจวัดแรงดันน้ำมันเบนซิน are available in varied sizes (shaft diameter 30–100 mm) and are designed to be used in each bigger hydrogen pumping amenities and decentralised functions, such as hydrogen filling stations.
Share