产品介绍

Conical roller bearings refer to radial thrust type rolling bearings with tapered rollers as the rolling element. There are two types: small cone angle and large cone angle. The small cone angle mainly bears radial and axial combined loads, which are mainly radial loads. It is often used in pairs and installed in reverse. The inner and outer race rings can be installed separately, and the radial and axial clearance can be adjusted during installation and use; The large cone angle mainly bears axial and radial combined loads, mainly axial loads, and is generally not used separately to bear pure axial loads. It can be used as a pair configuration (with the same end installed relative to each other) to bear pure radial loads.

definition

The ability of a single row tapered roller bearing to withstand axial loads depends on the contact angle, that is, the angle of the outer ring raceway. The larger the angle, the greater the axial load capacity. The most commonly used tapered roller bearing is a single row tapered roller bearing. In the front wheel hub of the sedan, small-sized double row tapered roller bearings are used. Four row tapered roller bearings are used in heavy-duty machines such as large cold and hot rolling mills.

Structural characteristics

The type code of tapered roller bearings is 30000, and tapered roller bearings are separable bearings. In general, especially within the size range mentioned in GB/T307.1-94 Rolling Bearings, the outer ring and inner components of tapered roller bearings can be interchanged 100% universally.

The angle of the outer ring and the diameter of the outer raceway have been standardized and specified to be the same as the external dimensions. Changes are not allowed during design and manufacturing. To enable universal interchangeability between the outer ring and inner components of tapered roller bearings worldwide.

Conical roller bearings are mainly used to withstand combined radial and axial loads, mainly radial loads. Compared with angular contact ball bearings, it has a larger load-bearing capacity and lower limit speed. Conical roller bearings can withstand axial loads in one direction and limit axial displacement of the shaft or casing in one direction.

classification

A single row tapered roller bearing has an outer ring, and its inner ring and a set of tapered rollers are enclosed by a basket shaped cage as an inner ring assembly. The outer ring can be separated from the inner ring component. According to the ISO tapered roller bearing outer dimension standard, any standard model of tapered roller bearing outer or inner ring component should be able to achieve international interchangeability with the same model of outer or inner ring component. The outer ring of the same model must comply with ISO492 (GB307) regulations for external dimensions and tolerances, and the cone angle and cone diameter of the inner ring components must also comply with relevant regulations for interchangeability.

Usually, the cone angle of the outer race of a single row tapered roller bearing is between 10 ° and 19 °, and it can withstand both axial and radial loads simultaneously. The larger the cone angle, the greater the ability to withstand axial loads. A bearing with a large cone angle, with a suffix B and a cone angle between 25 ° and 29 °, can withstand large axial loads. In addition, the clearance of single row tapered roller bearings can be adjusted during installation.

The outer ring (or inner ring) of the double row tapered roller bearing is a whole. The two inner (or outer) rings have similar small end faces and a spacer ring in the middle. The clearance is adjusted by the thickness of the spacer ring, or the pre interference of the double row tapered roller bearing can be adjusted by the thickness of the spacer ring.

3. Four row tapered roller bearings, this