Coordination is the base of bearing base: bearing hole system

Originated from the surface fatigue spalling reason, there are two situations: because of the raw materials in smelting and bearing parts forging, stamping, heat treatment and cold working process, the residue on the surface of non-metallic inclusion, rough granular carbides, pores, wrinkles, pit and metamorphic layer on the surface of the factors, such as in the process of bearing operation, due to the effect of contact stress, cause they take off, away from the mother or for plastic deformation caused by the microporous gathered an enlarged flake form. Do we have to take into account the shaft rotating at time of thermal material itself, so the greater the bearing, is a -, ~ clearance fit, big and not more than, clearance fit, the standard of GB/T to cooperate with rolling bearing journal provides common tolerance zone, common tolerance zone is defined for the shell hole, as shown in figure. A small amount of mud and powder leakage channels shall be removed at any time to work, rotor imbalance, Such as counterweight rotor screw off, make the eccentric block is not in the center of rotor shaft) 。 But why do people feel wool-like fabric? Because the surface has a lot of sweat, when after the fan works, indoor air is flowing, so it can promote the rapid evaporation of sweat, combined with the 'evaporation need to absorb a lot of heat, so people will feel cool. Thick wall bushing is commonly used in medium and small construction machinery, can be reduced by two brass gasket between the sectional plane or file on the surface of the convolution method to reduce the aperture, and then press journal scraping, to match the requirements. Rotary load relative to the ring spinning, the radial load and in turn in the ring groove on the entire circumference, ( b） And ( d） The outer ring have been a role position, in turn, change the effect of radial load F. So the inspection of this item, only for these type of motor in trial production or to individual by using for the first time found a serious impact on the bearing axis current of motor in improving design. That we need when choosing bearing lubricating oil and grease lubrication for understanding? Tell you, the first to know the bearing lubricant, what are you need the understanding lubricant performance options, and then to understand the principle of bearing lubricant use, after select lubricant. Larger shaft stiffness requirements, appropriate chooses double row ball bearing, roller bearing, or point contact ball bearings, heavy load, or a greater impact on the same protection when using double row or column roller bearings. Transmission bearing role will auto transmission is directly related to its function, auto transmission must meet the requirements of all kinds, including shift smoothly and high output power, compact structure, light weight, rate and low noise, etc. , and the demand is higher and higher. Because the roots blower adopts frequency conversion control, can to precise control of air volume, and compared with the control valve is more intuitive, convenient adjust air flow to meet production needs; The application of frequency conversion technology, make motor soft start, there is no starting current impact; Using frequency soft start, the starting current is not higher than the rated current. A, reduces the fan outlet pressure instantly improve the impact to the fan, so as to prolong the service life of the fan and other equipment. Small size motor adopts sealed bearing condition is more, its characteristic is no inner bearing cover and oil baffle heat sleeve on the shaft, the assembly is convenient; Saves bearing cover and end cover for the body, the cover and the cover screw, but the end cover processing cost is higher.