NCMS is assisting the US Navy to identify a partner with capabilities and experience customizing heating solutions for marine propulsion shafting.
Large propulsion shafts used in ships periodically require maintenance. These large shafts must be heated for straightening and stress relief. Currently this process is completed with the use of resistance power heaters. This process requires long set-up times and has many potential failure points. When a failure occurs, work must be stopped until the equipment has cooled and can be reset. This method results in increased downtime and cost, and it can create a backlog of shafts in line for maintenance.
The US Navy is seeking a partner with experience creating custom shaft heating systems. This partner must have the capabilities to develop all necessary tooling and processes. (e.g., induction heating)
Material: 4340 steel
Prop Taper: 26” to 20” diameter over a six-foot length
Straight Sections: 23” to 28.25” diameter
Fairwater Stocks: tapered 20” to 13” diameter over a length of 66”
Responses must be sent no later than COB on May 13, 2022.