Tapered Roller Bearings Introduction

Tapered roller bearings in the largest amount of single row tapered roller bearings. In front of the car's wheel hub, in recent years also used a small size double row tapered roller bearings. Four rows of tapered roller bearings used in large cold, hot rolling mill and other heavy machinery. Single row tapered roller bearings have an outer ring, the inner ring and a group of tapered rollers from the cage-shaped cage into an inner ring assembly. The outer ring can be separated from the inner ring assembly. According to the standard of ISO tapered roller bearing, the outer ring or inner ring assembly of any standard type of tapered roller bearing should be able to achieve the international exchange. That is the same type of outer ring in addition to external dimensions, tolerances to comply with the provisions of ISO492 (GB307), the cone angle of the inner components, component cone diameter must also comply with the relevant provisions of the exchange. Usually, single-row tapered roller bearing outer ring raceway cone angle in the 10 ° ~ 19 ° before, can bear the combined effect of bearing load and radial load. The larger the cone angle, the greater the ability to withstand axial loads. Large cone angle bearing, post code plus B, taper angle between 25 ° ~ 29 °, it can withstand greater axial load. In addition, single row tapered roller bearings can be adjusted during the installation of the size of clearance. Tapered roller bearings are mainly subjected to radial-based diameter, axial joint load. Bearing capacity depends on the raceway angle of the outer ring, the greater the angle the greater the carrying capacity. This type of bearing is a separate bearing, according to the number of rolling bearings in the column is divided into single row, double row and four row tapered roller bearings. Single row tapered roller bearing clearance users need to be adjusted during installation; double row and four row tapered roller bearing clearance has been given in the factory according to user requirements, without user adjustment. Tapered roller bearings have a tapered inner ring and outer raceway, tapered roller arranged in between. The projection lines of all conical surfaces meet at the same point on the axis of the bearing. This design makes tapered roller bearings are particularly suitable for composite (radial and axial) load. Axial load bearing capacity is mostly determined by the contact angle α; α angle, the higher the axial load capacity. The magnitude of the angle is expressed by the coefficient of calculation e; the larger the value of e, the larger the contact angle, the greater the applicability of the bearing to axial loads. Tapered roller bearings are usually separable, that is, a tapered inner ring assembly consisting of an inner ring with a roller and a cage assembly can be installed separately from the outer cone (outer ring). Tapered roller bearings are widely used in automobiles, rolling mills, mining, metallurgy, plastic machinery and other industries.