256 results about "Wear particle" patented technology

The invention discloses an electrostatic induction and optical imaging principle-fused online monitoring device and method for wear particles of a water-lubricated bearing, and belongs to the field of state monitoring of mechanical equipment. The device comprises a square insulation detection cavity, a detection electrode array, an electromagnetic shielding shell, a high-speed optical imaging module and a signal processing unit, the square insulation detection cavity is installed in a bearing lubrication water loop. The detection electrode array is fixed to the outer wall of the cavity and used for capturing electrostatic signals generated when the abrasion particles pass through. The electromagnetic shielding shell wraps the detection cavity and is grounded through a wire to eliminate environmental electromagnetic interference. The high-speed optical imaging module integrates a high-magnification microscope lens and a CMOS sensor, is coaxially mounted with the detection cavity, and obtains the morphology characteristics of the wear particles in real time; and the signal processing unit performs multi-modal data fusion analysis on the electrostatic signal and the optical image. Through cooperative detection of electrostatic induction and optical imaging, the monitoring precision and reliability of the wear particles of the water-lubricated bearing are remarkably improved.

The invention belongs to the technical field of metal part surface modification, and relates to a composite strengthening method for a carburized surface of a high-bearing gear of an aero-engine. According to the method, high-hardness and high-density ceramic shots are adopted as media for high-energy mechanical shot peening strengthening, the advantage that the subsurface strain hardening effect of the contact strengthening technology is good and the barb-shaped distribution characteristic of mechanical shot peening residual compressive stress are utilized, extremely high residual compressive stress is introduced to the subsurface position, and the contact fatigue performance of the tooth surface of the gear is improved. High-frequency laser shot peening strengthening is used for secondary treatment, so that the surface layer of the material is subjected to plastic deformation, high-amplitude residual compressive stress is introduced into the surface layer of the material within the depth range of more than 500 microns by utilizing the advantage of large influence depth of laser-induced shock waves, and the residual compressive stress can inhibit fatigue crack initiation, has a certain depth and inhibits fatigue crack propagation; and the bending fatigue resistance of the root of the gear can be effectively improved. And an abrasive flow process is adopted, so that the roughness is reduced to be more than 0.4 mu m.

The invention relates to the technical field of grinding machining, and particularly discloses a four-row cylindrical bearing raceway grinding machining device and method.The four-row cylindrical bearing raceway grinding machining device comprises a loading unit, a grinding unit and a grinding unit, the loading unit comprises a rotary table, a flexible clamping piece matched with a bearing outer ring is arranged on the rotary table, and a concave part is arranged in the flexible clamping piece; the grinding unit comprises a grinding motor, the output end of the grinding motor is connected with a rotating shaft, a grinding disc is arranged at the lower end of the rotating shaft, and a multidirectional dynamic cooling piece is arranged on the lower end face of the lifting air cylinder. Uniform clamping force is applied to the outer wall of the bearing outer ring through the flexible clamping piece, clamping stress is restrained, clamping deformation is small, and microscopic cracks caused by stress concentration are avoided. The multidirectional dynamic cooling piece integrates axial injection and radial injection, thermal damage is blocked, the temperature rise of a grinding area is effectively reduced, and the risk of surface burn is eliminated; the high-pressure cooling liquid scours a grinding interface in a turbulent flow mode, and microscopic cracks caused by secondary extrusion of abrasive particles are avoided.