Motor rolling bearing assembly requirements

2019 - motor rolling bearing assembly requirements 05 - 22 a, 1, the bearing of rolling bearing cleaning rust-proof oil and grease dug, and then on the hot melted the residual oil in the engine oil. 2, use kerosene wash and then rinse with gasoline, and to wipe them with a clean cloth. 3, also can use other detergent ( No abrasion) Cleaning, and bearing a cloth to wipe clean. 4, with dirty oil or dirty cloth, cotton yarn or dry cleaning. Second, check 1 of rolling bearing, the bearing body inside and outside is clean. 2, bearing inner and outer race, rolling element and cage ( Keep the frame) If there is a crack, burr, rust, bruised, appearance size, weight, etc. The phenomenon of appearance quality is bad. 3, bearing inner race can with shoulder closely rely on. 4, bearing clearance eligibility requirements. 5, the rotation bearing light, do you have any difficult to rotate or suddenly stuck phenomenon. Six, bearing accessories are complete. 7, check the defects found in the process, must have a method to eliminate; If you can't eliminate, you must replace new bearing. 3, rolling bearing assembly requirements 1, first choose qualified bearing quality, check and cooperate with trunnion or bearing body, and determine what kind of cooperation way, the main consideration of bearing working conditions ( Load, speed, temperature, etc. ) 。 General provisions: rotating seat USES the interference fit, not rotating seat with little interference fit; The higher the speed, the rotating seat with shaft with interference should be bigger. Smaller interference, light work load application load weight can use larger interference. The higher the working temperature, the inner race and the shaft with interference should be, the greater the bearing hole and the outside with the seat should be smaller. Often remove the bearing, the use of smaller interference fit. 2, it says on the bearing model of end face should be in a visible place, to facilitate replacement can identify the bearing type. 3, trunnion or shell hole shoulder radius, arc radius should be less than the bearing to ensure the assembly after the bearing and the shaft shoulder by shoulder and shell hole tightly. 4, bearing fixing device must be in good condition and reliable, and tightening process is moderate, reliable locking. 5, bearing assembly process, should strictly keep clean, prevent debris into the bearings. After 6, assembling, bearing should be flexible rotation, no noise, the general working temperature is less than 50 ℃. Four, the principle of rolling bearing assembly method of assembly: according to the bearing structure, size, working conditions, and cooperate with properties of bearing parts, assembly pressure should be directly on the ring width to stay fit, don't allow through the transfer roller pressure. 1, push the assembly method: using copper bar and tapping (hand ' Can also be based on the size of the shaft and hole do tooling is milled) , should be symmetrical to knock in a certain order, be sure to play on the seat with interference, and knock wants even, avoid the weak parts of the bearing inner and outer ring. Also can use the pressure into the press and the same with the above methods, but must pay attention to the uniform pressure, not skewed. 2, temperature difference assembly method: rolling bearing allows the oil heating, the oil temperature should be between 100 ~ 120 ℃ ( Plastic spacer must not exceed 100 ℃) , bearing should be oil into the cold, do not allow the bearing contact with heating and wall at the bottom of the container, the oil temperature rise gradually, to achieve temperature quickly, suit in put on the diameter of axle, natural cooling, check whether installed. 3, power frequency induction heater, commonly known as bearing heater, currently USES the assembly method is more advanced, and reduce pollution. Five, should pay attention to item 1, either way it should be paid attention to in accordance with the operating principles, requirements, must be in accordance with the procedures to do, and make records. 2, after the assembly, must according to the working conditions of the result in the process of reviewing and make clearance adjustment, ensure the bearing clearance, to meet the use requirements. 3, rolling bearing gap adjustment, general use: (1) gasket adjustment, by changing the thickness of the bearing cover gasket with pressure, such as lead, feeler, caliper measurement to measure average, choose suitable gasket requirements; (2) screw adjustment: through the screw to the axis of rotation, and then according to the need of clearance, return the screw to a certain distance, According to the distance and pitch calculation pour twist Angle) ； (3) feel adjustment: under the condition of low precision work, tighten with experience will be bearing, axis used for turning, elastic depend on experience, feeling the axial and radial clearance to adjust the thickness of the gasket.