Experimental validation of a thermal model of a LOx flooded ball bearing

Development of a Cryogenic Tester with Air Bearing to Test Sliding-Rolling Contact Friction

“…Therefore, the tester developed in this study can almost complete the friction coefficient test of cryogenic solid lubricants. Considering the actual working environment of cryogenic bearings, the tester developed in this study meets the following technical requirements for low-temperature solid friction wear testing under different working conditions: (1) The range of rolling velocity is 1-50 m/s, and the velocities can be changed stepless; (2) The slide-to-roll ratio was in the range of 0-0.35; (3) The loading range was 0-1500 N; (4) The maximum Hertzian contact pressure was 0-3.5 GPa; (5) The ambient temperature range of the contact area of the specimen is from −175 °C to room temperature. The above performance requirements can almost meet the working environment requirements of cryogenic bearing lubricants.…”

“…As an important basic component, the failure of a rolling bearing can lead to catastrophic consequences [1]. Bearings used in the aerospace industry usually operate under extremely harsh conditions such as cryogenic temperatures, heavy loads, and high rotational speeds [2]. In cryogenic environments, oil and grease lubrication for bearings is not possible owing to the extreme temperature conditions.…”

An accurate calculation method for heat generation rate in grease-lubricated spherical roller bearings

“…The term V lj in equation (13) represents the sliding velocity at the lth lamina of the roller-raceway contact due to rolling surface deformation, which can be expressed as 21…”

“…Babu et al 12 experimentally studied the contact heat resistance and heat flow between balls and raceways in a polished ball bearing, and analyzed the influences of contact surface roughness, interface temperature, and medium on contact heat resistance in the thermal steady state of the bearing. Servais et al 13 conducted experiments to study the thermal behaviors of a ball bearing working in the atmosphere of liquid oxygen. The testing results show that there is a critical load for the bearing working in liquid oxygen.…”