The installation of tapered roller bearing

Tapered roller bearing is separable bearing, inside and outside the circle can be separated. So when installation, can keep the inner ring frame components being connected on the shaft, roller outer load bearing hole separately. When using the sleeve being connected, should be paid attention to, must make in the outer sleeve end face, shall not be placed in the tilt of the raceway surface. Tapered roller bearings are installed in pairs, in the installation should grasp three aspects mainly: choose to install with; Adjust the axial clearance; Commissioning and testing temperature. Choose to install with tapered roller bearing outer ring and bearing shell hole unfavorable use interference fit, and with the inner ring and shaft neck also shoulds not be too tight, requires adjusting nut is used during the installation should be able to make it more flexible axial displacement. Because if use interference fit tapered roller bearing, easy to change the contact Angle of the bearing, bearing load distribution, caused by high temperature. So, this kind of bearing inner and outer ring with the installation of the journal and bearing shell holes, should be generally by just push hands thumb to bearing shaft neck and shell holes for the best. Adjust the axial clearance for the installation of the tapered roller bearing axial clearance, available on the journal of adjusting nut, adjusting shim and bearing hole of the thread, or use the methods of preloaded spring to adjust. Axial clearance size, the layout of the bearing installation and, the distance between bearings, shaft and bearing material, can be determined according to the working conditions. For high load high speed circular cone roller bearings, adjust clearance, must consider the effect of temperature on the axial clearance, clearance reduction is estimated, will cause the temperature rise, that is to say, the axial clearance to properly adjust a bit bigger. For low speed and vibration of the bearing, no clearance should be taken to install, exerted load or the installation. Its purpose is to make the taper roller bearing roller and raceway produce good contact, uniform distribution load, to prevent damaged roller and raceway is impacted by the vibration. After adjustment, the axial clearance with the size of the dial gauge test. Method is first will dial gauge fixed on the fuselage or bearing seat, smooth surface of the dial gauge contact to resist axis, around along the axial shaft, whose hands of throwing is the largest axial clearance value. For commissioning and testing temperature for the tapered roller bearing roller and raceway contact is good, and obtain the appropriate axial clearance, the tapered roller bearing installation and after each adjustment windage, shall be for commissioning and testing temperature. Method is first speed 2 - 8 minutes, then speed running in 2 hours, and then step by step to high speed. Speed test run shall not be less than 30 minutes per level, the temperature rise rate per hour is no more than 5 ℃, the stability of the final temperature shall not exceed 70 ℃. In addition, in the installation of the tapered roller bearing and adjust the clearance, but should also note that must make big rim contact good tapered roller and inner circle.