How to keep the rolling bearing limit speed of longevity

Bearing in loaded on the rotor dynamic balance when it is easy to dynamic balance of iron into the bearing inside, so it is best to install bearing before do dynamic balance. There are some manufacturers in order to assemble ( 组装) When convenient, assembly in bearing indoor ( 室内) Apply some oil or grease lubrication effect, but usually operators can volume control ( 控制) Well, if oil or grease in the bearing interior storing up more, in the bearing rotates along axis to the rolling bearing inside easily. Bearing is best not to apply oil or grease, if must apply to control shall not be storing up in bearing interior. General bearing ( 轴承) Sound is equal to the raceway plus other sound. Ball bearing raceway is irregular, frequency above 1000 hz, its main frequency with engine speed ( 转速) Come and go, but its total sound pressure level increases with speed to speed up. Raceway large bearings, the rolling sound of sound pressure level decrease with the increase of the viscosity; The raceway small bearings, the sound pressure level in the viscosity increases to about 20 was/s above, from decreased to increase somewhat. And the rigidity of the bearing, the greater the raceway of the lower the total sound pressure level. Such as radial clearance is too small, the total sound pressure level and race will follow the decrease of radial clearance and main frequency increased dramatically. Method to control the raceway ring ( 方法) : choose low noise bearing is bearing waviness is very small, that is, deliberate choices ( 选择) To use ( 使用) The premise. Race often affect the mechanical noise, reduce the raceway can reduce the mechanical noise. The impact of the moving body sound and its control method for larger models of ball bearing ( 轴承) Or speed cylindrical roller bearing under pure radial load ( 旋转) , because of the centrifugal force of a moving body small, on the moving body will impact the load area or race and making noises. Bearing bearing lubrication method, divided into grease lubrication and oil lubrication. In order to make the bearing function well, first of all, to choose suitable for conditions of use, the purpose of lubrication method. If only consider lubrication and oil lubrication. However, grease lubrication can simplify the structure of bearing the surrounding of the special features, compare the pros and cons of grease lubrication and oil lubrication. But with the progress of speed, the noise will disappear. To move body impact noise control methods are: decrease the radial clearance, use a reasonable structure, 结构) The material has a mild nature bearing cage. Rolling bearing of rolling mill rolling mill and its control method is cylindrical roller bearing can occur on all occasions sharp metal friction sound when most needed is least heeded, mostly happens in large type bearing grease lubrication, and in the base function of oil degradation occurred more often in lubricating oil, almost does not occur when oil lubrication. Bearing the use of clean environment for bearing is very important. Such as cross section thin-walled bearing ring rotation surface and rough surface precision of the rolling element is about 1/10 microns, this smooth surface of the ball if polluted, its influence is very serious. In addition, more easily occur during the winter, when under pure radial load, the radial clearance of big occasions occur easily, and with different size, easily happen in a certain speed range, both continuous and intermittent flush. External ring raceway take special processing method can prevent roll ring flush, can choose this kind of bearing, if necessary or appropriate to reduce bearing radial clearance, good use function of grease and progress to suit the bearing parts of rigidity. Rust paint is characterized by multiple in sealing type motor, the motor sound is very good, when it is assembled but put some time in the warehouse, the motor sound is very big, remove the bearing ( 轴承) There are serious rust phenomenon. Many manufacturers will think is a problem of bearing before, after our continuous publicity, motor factory now has realized mainly insulating paint ( Explanation: the floorboard of the film-forming substances in solvent colloidal solution) The problem. The problem is mainly due to varnish volatile acidity ( 酸度) Material in a certain temperature ( 温度) Corrosion (humidity formation, Definition: refers to decay and disappear, erosion, etc. ) Sexual material, bearing the channel after corrosion result in bearing damage. The problem now is only to choose good insulating paint, after drying and ventilation assembly after a period of time. Rolling bearing design ( Design) : load, calculation, life limit speed ( 转速) Check, the limit of the bearing with angular contact ball bearing of the bearing rotational speed bearing limit of limit speed and basic knowledge of rolling bearing friction coefficient ( 058). Bearing the limit speed of rolling bearing under what circumstances can achieve maximum speed limit speed? To benchmark the threshold of the bearing rotating speed with the limit speed said how to understand the limit speed of the bearing? With seals of the ball BEARING limit speed NINGBO SUNTHAI BEARING F& An article on F: maintenance of importance of outer spherical bearing lubrication next article: how to deal with the spherical roller bearings use the matters needing attention of the grease