1. Force 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,The outer diameter should be slightly smaller than the bearing inner ring to avoid pressing on the retainer.The outer ring of the bearing is tightly matched with the bearing seat hole. When the inner ring and the shaft are loosely matched, the bearing can be pressed into the bearing seat hole first. At this time, the outer diameter of the assembly sleeve should be slightly less than the diameter of the seat hole.If the bearing ring is tightly matched with the shaft and the seat hole, the inner ring and the outer ring should be pressed into the shaft and the seat hole at the same time, and the structure of the assembly sleeve should be able to tighten the end face of the inner and outer ring of the bearing at the same time.
2. Heating fit An installation method that converts tight fit into loose fit by heating the bearing or bearing seat and using thermal expansion.It is a common and labor-saving installation method.This method is suitable for the installation of bearings with large interference amount. Before hot loading, put the rings of bearings or separable bearings into the oil tank for uniform heating of 80-100℃, and then take them out of the oil and install them on the shaft as soon as possible. In order to prevent the end face of the inner ring and the shaft shoulder from fitting tightly after cooling, the bearings can be further axial fastening after cooling.When the outer ring of the bearing is tightly matched with the bearing seat made of light metal, the hot charging method of heating the bearing seat is adopted to avoid the scratch on the matching surface.Tank heating bearings, at a certain distance from the bottom should be a net bar, or hanging hooks in the bearings, bearing on the bottom, in case of heavy 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.
3. The installation of the 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 always measure the clearance in order to achieve the required clearance reduction is so far,Lock nut is generally used for installation, and heating can also be used for installation.
4. Installation of thrust bearing The balance between the thrust bearing and the shaft is generally the transition fit, and the match between the seat ring and the bearing seat hole is generally the clearance fit, so this kind of bearing is easier to install. The central shaft spring of the two-way thrust bearing should be fixed on the shaft to prevent rotation relative to the shaft.The installation method of bearings is generally shaft rotation, so the match between the inner ring and the shaft is overmatch, and the match between the outer ring and the bearing chamber is clearance match.