Device for targeted repair of micro-nano damage of inner ring of aeroengine bearing and method for targeted repair of micro-nano damage of aeroengine bearing based on electric-magnetic composite field

A device for targeted repair of micro-nano damage of an inner ring of an aeroengine bearing based on an electric-magnetic composite field, the device comprising a driving device, an ultrasonic shot peening device, a pulsed current generator and a magnet yoke-coil device, wherein:

• the driving device comprises a motor and a rotating shaft, the rotating shaft is configured for fixedly installing a bearing inner ring to be machined, and an output shaft of the motor is connected to the rotating shaft and drives the rotating shaft to drive the bearing inner ring to rotate synchronously;
• the ultrasonic shot peening device comprises an ultrasonic shot peening cavity, an ultrasonic probe and steel balls, openings are respectively formed in an upper end and a lower end of the ultrasonic shot peening cavity, the ultrasonic probe extends into the ultrasonic shot peening cavity from the opening in the lower end of the ultrasonic shot peening cavity, and the steel balls are placed on the ultrasonic probe and cover an upper surface of the ultrasonic probe;
• the opening in the upper end of the ultrasonic shot peening cavity is placed below and in clearance fit with the bearing inner ring to be machined;
• ultrasonic impact surface nanometer strengthening is able to be carried out on the bearing inner ring by separately starting the ultrasonic probe and the motor;
• an input-end contact and an output-end contact of the pulsed current generator are in contact with two ends of the bearing inner ring respectively and are configured for generating pulsed current on the bearing inner ring to excite an electric field;
• the magnet yoke-coil device comprises a magnet yoke plate and a current-carrying coil wound around the magnet yoke plate, the magnet yoke plate is installed on a side of the bearing inner ring, and the current-carrying coil is configured for being connected with the pulsed current so as to excite a magnetic field around the bearing inner ring,
• wherein a rotation axis of the bearing inner ring is perpendicular to a direction of the magnetic field and a direction of electric field.