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The characteristics, differences and application of bearings

time:2023-05-31   pv:3

Bearings are crucial parts in mechanical equipment. Its main function is to support the mechanical rotating body to reduce the mechanical load friction coefficient of the equipment during the transmission process.

Bearings are divided into radial bearings and thrust bearings according to the bearing direction or nominal contact angle.

According to the type of rolling element, it is divided into: ball bearings, roller bearings.

According to the number of rows of rolling elements, it is divided into: single-row bearings, double-row bearings, and multi-row bearings.

1.Angular contact ball bearings.

There is a contact angle between the ferrule and the ball. The standard contact angle is 15°, 30° and 40°. The larger the contact angle is, the greater the axial load capacity is. The smaller the contact angle is, the more favorable it is for high-speed rotation. Single row bearings can Bear radial load and one-way axial load.

The main purpose:

Single column: machine tool spindle, high frequency motor, gas turbine, centrifugal separator, small car front wheel, differential pinion shaft.

Double row: oil pumps, air compressors, various transmissions, fuel injection pumps, printing machinery.

2.Thrust ball bearing.

It consists of a washer-shaped raceway ring with a raceway, a ball and a cage assembly. The raceway ring that matches the shaft is called the shaft ring, and the raceway ring that matches the housing is called the seat ring.

Main application: automobile steering pin, machine tool spindle.

3.Cylindrical Roller Bearings.

The rollers of cylindrical roller bearings are usually guided by two ribs of a bearing ring, and the cage roller and guide ring form an assembly that can be separated from the other bearing ring, which is a separable bearing.

This kind of bearing is easy to install and disassemble, especially when the inner and outer rings are required to be interference fit with the shaft and housing.

Main applications: large motors, machine tool spindles, axle boxes, diesel engine crankshafts, automobiles, gearboxes, etc.

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