Oil Free Bearings for APUs
Small Business Information
437 New Karnr Rd, Niskayuna, NY, 12309
Dr Hooshang Heshmat
AbstractActive magnetic bearings (AMBs) make potentially reveolutionary Auxiliary and Integrated power Units (APU/IPU) designs possible. However, their ability to sustain and operate through transient events, while remaining both small and lightweight is restricted. Since APU/IPU size, weight and reliability are crucial flight worthy design issues, a durable compact backup bearing system is needed. Moawk Innovative Technology, Inc. (MiTI) proposes development of a lightweight Zero Clearance Auxiliary Bearing (ZCAB) suitable for high-speed high-temperature rotor systems. MiTi has already demonstrated the ZCAB at speeds to 10,000 rpm, under simulated shock, under simulated AMB failure and has a patent pending for this backup bearing. Under this proposed program, MiTi will 1) refine he ZCAB design for high speed IPU operation; 2) conduct design tradeoff studies to optimize the total bearing package size and weight for the advanced IPU under development by Sundstrand; 3) select the ZCAB tribomaterials system needed to assure adequate life; and 4) prepare a preliminary design of a high speed simulator test rig of the Sundstrand IPU to verify ZCAB operation throughout the required operating envelope. The support of Sundstrand Aerospace has been enlisted for Phase I to provide guidance and review the preliminary integrated ZCAB system design. Under Phase II a prototype integrated AMB/ZCAB system will be fabricated and tested under both steady state and transient conditions to verify the integrity of the design for ultimate demonstration in the Sundstrand IPU during a Phase III activity.
* information listed above is at the time of submission.