The installation of motor bearing and lubrication

Before the installation of bearings, must ensure that the installation surface and the environment clean. If bearing with iron filings, burr, dust and other foreign matter to enter, will make the bearing noise and vibration during operation, and even damage raceway and rolling body. Cleanliness of bearing life and the influence of vibration noise is very big. When installing the bearing, not directly hammer bearing end face and the bearing surface, should be to press, sleeve or other installation tools for uniform bearing force, not through the rolling element power installation. If the installation surface coated with lubricating oil, will make the installation more smoothly. If the interference fit is larger, should put the bearing into the mineral oil in installation as soon as possible after heating to 80 ~ 90 ℃, strictly control the oil temperature does not exceed 100 ℃, in order to prevent the effect of tempering hardness decrease and recovery effect size. Bearing radial clearance of the bearing radial clearance is not as small as possible, should choose the most appropriate clearance according to conditions. Not all require the smallest bearing clearance work, basic radial clearance group applicable to the general operation conditions, normal temperature and range of the commonly used; In the high temperature, high speed, low noise, low friction bearing special conditions such as work, appropriate chooses big radial clearance; For precision spindle, spindle bearing, and other appropriate chooses smaller radial clearance; For roller bearing clearance can keep a small amount of work. In addition, the separation type of bearing is not clearance; Bearing capacity after work clearance, than the original clearance before the installation is small, because bearings to withstand the load rotation, and bearing fit and load produced by the elastic deformation. Bearing lubrication of bearings and lubrication of work and life have very important influence. Grease made out of base oil, thickener and additive, different types and different type of same kind grease properties vary widely, allowing the rotation of the limit, when the choice is important to note. The performance of the grease is mainly composed of base oil, the basis of generally low viscosity oil is suitable for low temperature, high speed, high viscosity is suitable for high temperature, high load. Thickener and relationship with lubrication performance, thickening agent, water resistance to lubricating wax water resistance. In principle, different brand of grease can't mix, and even the same thickening agent of grease, will also bring bad influence each other on the basis of different additives. Lubricated bearing, a lot of people think that the more grease coating, the better, this is a common mistake concept. Bearing and bearing indoor excessive grease will cause excessive oil mixing, resulting in a high temperature. The number of bearing lubricant filling with full of bearing internal space 1/2 ~ 1/3 advisable, high speed should be reduced to one-third. Bearing installed the commonly used method of bearing, usually is the situation of the axis of rotation, so the inner ring and the shaft fits for interference fits, with the bearing outer ring and bearing chamber for clearance fit. Low pressure fit. Bearing inner ring and shaft tight fit, outer ring and bearing hole is a loose fit, press the bearing to be pressed on the shaft are available, and then put the shaft together with the bearing load bearing hole, when pressed on the bearing inner ring end face, cushion the assembling casing made of a soft metal materials ( Copper or mild steel) , the inner diameter of the casing assembly should be slightly larger than the diameter of a journal, outside diameter than the bearing inner ring guard slightly smaller, in order to avoid pressure in keeping the frame. Bearing outer ring and bearing hole tight fit, inner ring and the shaft is a loose fit, the bearing can be pressed into the bearing hole first, then assembling casing diameter should be slightly less than the diameter of a hole. If the bearing ring and shaft and hole is a tight fit, install indoor ring and outer ring to pressure into the shaft and hole, at the same time assembling casing structure should be able to at the same time, pressure bearing inner ring and outer ring end face. Cooperate with low heat. By heating bearing or bearing seat, by using thermal expansion will fit into a loose fit installation method. Installation method is a kind of common and energy saving. This method is suitable for interference quantity larger the installation of the bearing, the bearing before hot charging type or separable bearing ring into the fuel tank 80 - uniform heat 100 ℃, and then loaded on the shaft, as soon as possible out of the oil to prevent inner ring after cooling end face and shoulder joint is not tight, bearing axial fastening again after cooling. Bearing outer ring and light metal bearing seat tight fit, by heating the hot charging method of the bearing, can avoid the mating surface scratch. Heating tank with bearing and should be at a certain distance from the bottom of a mesh, or hanging hooks in the bearings, bearing on the bottom, to prevent impurities into the bearing or uneven heating, fuel tank must have a thermometer, strictly control the oil temperature shall not exceed 100 ℃, in order to prevent the tempering effect, reduce the hardness of the ring. The installation of low cone bearing. Cone hole can be directly installed in a shaft with taper bearing neck, or load set set of the cone, and the withdrawal of the tightness of cooperate bearing radial clearance reduction is available to measure, therefore, before installation should be measured bearing radial clearance, the installation process should often measure the clearance in order to meet the need of clearance reduction is, commonly used while installing lock nut installation, also can adopt the method of heating installation. The installation of low thrust bearing. Thrust bearing inner ring and the shaft with the general transition fit, seat and the bearing holes with the general for the clearance fit, so this kind of bearing is easy to install. 【 Warm prompt. 【 The bearing network] Some information from the Internet, and strive to secure timely, accurate, aims to deliver more information, does not represent our views to its approval or responsibility for their authenticity. If this net reprint information involves the issues such as copyright, please contact with this net. Tel: 0571 - 81630205. Tags: install and remove