Motor bearing run laps problem analysis - bearing knowledge

Friend speak some enterprise, a group of motor bearing system failure happens, bearing chamber has obvious real clean, bearing indoor waveform spring leaf has obvious scratch. From the fault surface, belongs to the typical bearing outer ring. Today we will talk about motor bearing run laps. The mutual relationship between bearing and shaft end cover most of the motor adopts rolling bearing, roller bearing with inner and outer ring friction into rolling friction, the friction surfaces in is very small. Bearing and shaft, bearing and end cover with general for surplus to cooperate, a few conditions for transition fit. Each other mutual extrusion is opposite bigger, so it creates a static friction, bearing and shaft, bearing and end cover remained relatively static, and on the roller and inner circle ( Or outer ring) Rotating transfer between mechanical energy. Run laps if bearing and shaft bearing, with the bearing housing is clearance fit, the torsion sliding would ruin the relatively static state, the so-called 'circle', sliding bearing inner ring and shaft takes place is called the laps, sliding bearing outer ring and bearing chamber takes place is called outer ring. Bearing run laps of the appearance of bearing run laps and harm if happen, bearing parts will be high temperature, vibration will be big. Dismantling check will find axis ( Bearing chamber) Surface scratches, even groove of the shaft or the bearing chamber surface grinding. From this kind of situation can be concluded that for bearings run laps. Bearing outer ring of the negative effects on the equipment run very big, will intensify cooperation parts wear and tear, or destroyed, and even affect the accuracy of form a complete set of equipment; In addition, because of the increased friction, will take a lot of energy into heat and noise, greatly reduce the efficiency of motor. The cause of bearing run laps, 1) Fit tolerance: bearing and shaft ( Or bearing chamber) The fit tolerance have strict requirements, different specifications, precision, force, operating conditions such as different to fit tolerance requirement. Once the tolerance matching problems, motor bearing run laps problem will be the quality problem of the mass. ( 2) Fabrication and installation accuracy: refers to the shaft, bearing, bearing chamber machining tolerance, surface roughness and assembly accuracy and other technical parameters. If can not meet the requirements, will affect the fit tolerance, lead to bearing run laps. ( 3) The material of shaft, bearings is critical. Different kinds of bearings should be compatible with the bearing steel manufacturing, strength, stiffness, better wear resistance, the friction coefficient of bearing alloy, to guarantee the normal use of bearings, reducing the possibility of a run laps. Bearing run laps common repair measures at present domestic repair bearing run laps common method for set set, pitting, welding, brush plating, thermal spraying, laser cladding, etc. Surfacing: surfacing welding was conducted on the edge of the workpiece surface or deposited a layer of abrasion resistant, corrosion resistant, heat resistant performance of metal layer welding process. Thermal spraying: thermal spraying molten state of the spraying material, by high-speed airflow makes its atomized spray on parts surface, forming a metal surface spray coating processing method. Brush brush plating: plating is electricity solution method on the workpiece surface coating process. Pieces of laser cladding, laser cladding which is also called laser cladding or laser deposition, is a new surface modification technology. Repair is a kind of helpless choice, run laps is motor bearing manufacturer of choice.