Tapered Roller Bearings have tapered raceways in the inner and outer rings with conical rollers arranged between them.
Due to the contact angle, tapered roller bearings can absorb high radial and axial forces in one direction.
Tapered roller bearings are often combined in pairs to support axial forces in both directions.
Tapered roller bearings are radial thrust type rolling bearings with tapered rollers as the rolling body. There are small tapered angle and large tapered angle two kinds. Small taper angle mainly bear radial load mainly radial and axial combined load, often into double use, reverse installation, inside and outside the seat ring can be installed, in the installation and use of radial and axial clearance can be adjusted; large taper angle mainly bear axial load mainly axial and radial combined load, generally not used to bear pure axial load alone, when the pair configuration (the same name end relative installation) when available to bear pure radial load. When installed as a pair (the same name end relative) can be used to withstand pure radial load.
Types
Single row tapered roller bearings have an outer ring, its inner ring and a group of tapered rollers by the basket-shaped keep frame into an inner ring assembly. The outer ring can be separated from the inner ring assembly, in accordance with ISO tapered roller bearing size standard provisions, any a standard model of tapered roller bearing outer ring or inner ring assembly should be able to and the same model outer ring or inner ring assembly to achieve international interchangeability. That is, the same type of outer ring in addition to the external dimensions, tolerances need to comply with ISO492 (GB307), the inner ring components of the cone angle, components such as cone diameter must also comply with the relevant provisions of the interchange.
Usually, single tapered roller bearing outer ring raceway taper angle in 10 ° ~ 19 °, can simultaneously withstand the combined effect of axial load and radial load. The larger the cone angle, the greater the ability to withstand axial load. Large tapered angle bearing, rear code plus B, taper angle between 25 ° ~ 29 °, it can withstand the larger axial load. In addition, single row tapered roller bearings can be installed in the process of adjusting the size of the clearance.
The outer ring (or inner ring) of double row tapered roller bearing is a whole. Two inner ring (or outer ring) small end face is close to the middle of the spacer, clearance is to rely on the thickness of the spacer to adjust, also available spacer thickness to adjust the double row tapered roller bearing preload.
Four tapered roller bearings, the performance of such bearings and double row tapered roller bearings are basically the same, but than double row tapered roller bearings to bear the radial load is greater, the limit speed is slightly lower, mainly for heavy machinery.
Multi-sealed double and four row tapered roller bearings, ZWZ provides long life, multi-sealed double and four row tapered roller bearings. Personalized new design of bearings, change the traditional design method of fully sealed bearings, using a new type of seal structure type that combines sealing and dustproof, improve the sealing effect and improve the sealing performance. Multi-sealed double and four-row tapered roller bearings have 20% to 40% longer life compared with open structure bearings; the lubricant consumption is reduced by 80%.
Application
Tapered roller bearings mainly bear radially oriented combined radial and axial loads. Bearing bearing capacity depends on the outer ring of the raceway angle, the larger the angle bearing
The larger the angle, the greater the bearing capacity. The bearings are separated bearings, according to the number of rolling elements in the bearings are divided into single row, double row and four row tapered roller bearings. Single row tapered roller bearing clearance needs to be adjusted by the user during installation; double row and four row tapered roller bearing clearance has been given according to the user's requirements when the product is shipped, without user adjustment.
Tapered roller bearings have tapered inner ring and outer ring raceway, tapered roller arrangement in between. All tapered surface projection lines are in the same point of the bearing axis convergence. This design makes tapered roller bearings particularly suitable for carrying combined (radial and axial) loads. The axial load capacity of the bearing is mostly determined by the contact angle α; the larger the α angle, the higher the axial load capacity. The size of the angle is expressed by the calculation coefficient e; the larger the value of e, the larger the contact angle, the greater the suitability of the bearing to bear axial load.
Tapered roller bearings are usually separated, that is, the inner ring with rollers and cage assembly composed of tapered inner ring assembly can be installed separately with the tapered outer ring (outer ring).
Tapered roller bearings are widely used in automobile, rolling mill, mining, metallurgy, plastic machinery and other industries.
