Type and use of bearings
Angular contact bearing:
Angular contact ball bearings are divided into a variety of structures, single row angular contact ball bearings can withstand radial load and a single direction of the axial load.
The DB combination,DF combined intoFour-point contact,Double row angular contact ball bearings can withstand both radial and bidirectional axial loads.
Angular contact ball bearings are suitable for high speed and high precision rotation.
This type of bearing is mainly
Used for machine tool spindle, high frequency motor, oil pump, air compressor, printing press, etc.Four-point contact ball bearings are mostly used in the oil roller box of rolling mill to bear axial negative
Acknowledge.
Aligning roller bearing
The outer ring is a spherical surface with the bearing center as the center of the ball, which has the automatic centering property. The rolling body is in linear contact with the inner and outer ring raceway, which can bear large pressure
Radial load.Suitable for mining, metallurgy, papermaking, construction and other large mechanical equipment.
Tapered roller bearing
The metric cone (single column), metric cone (four columns), imperial cone (four columns), imperial cone (two columns), and imperial cone (single column) are mainly used to bear combined radial and axial loads, mainly radial loads.The outer ring is detachable and easy to assemble.Axial clearance and radial clearance can be adjusted in the process of installation and use.
Deep groove ball bearing
Features:
Deep groove ball bearing its inner and outer ring raceway are arc-shaped deep groove, can bear radial load, bidirectional axial load and its composite load, and is suitable for high
Rotate speed.When the speed is high and the thrust ball bearing is not suitable, it can also be used to bear the pure axial load.Compared with other types of bearings of the same size, this type of bearing friction system
Small number, high limit speed.However, it is not resistant to impact and is not suitable to bear heavy loads.The deep groove ball bearing cage is mostly made of steel plate, and the large bearing is mostly made of metal
Physical cage.After the deep groove ball bearing is mounted on the shaft, the axial displacement of the shaft or the housing in both directions can be limited within the axial clearance range of the bearing, so it can be axial in both directions
Positioning.In addition, the bearing also has a certain ability to adjust the center, when relative to the shell hole tilt
When 2 '~ 10', it can still work normally, but it has some influence on the bearing life.
USES:
Deep groove ball bearings are widely used in automobiles, tractors, machine tools, motors, water pumps, agricultural machinery, textile machinery, etc.
Types of deep groove ball bearings:
Bearing with sealing ring or dust cover
Dust cover: single or double iron dust cover.
Non - contact rubber seal ring: one - side or two - side non - contact seal ring.
Contact rubber sealing ring: one or two contact rubber sealing rings are in contact with the inner ring.
Outer ring with stop groove
N: there is a stop slot in the outer ring
NR: outer ring with stop slot and stop ring.
Aligning ball bearing
Features:
Aligning ball bearing is a double row ball bearing with outer ring raceway processed into a spherical shape and two deep raceway in the inner ring. The inner ring, ball and cage can rotate freely around the center of the bearing
Turn, have the function of adjusting the center.Its centering capability can compensate for the alignment error, shaft deformation and bearing block deformation.It is mainly used to bear radial load in bearing radial load
At the same time, it can also bear a small amount of axial load, but generally can not bear the pure axial load, its limit speed is lower than the deep groove ball bearing.This kind of bearing is often used under load
The relative inclination between the center line of the inner ring and the center line of the outer ring shall not exceed 3 degrees.The inner hole of the ball bearing can be cylindrical or conical, and the bearing cannot be separated.
Cylindrical roller bearing
USES:
Aligning ball bearing is suitable for shaft and upper housing to the center of the difficult, the shaft is prone to flexure of the transmission bearing.It is widely used in mechanical and electrical equipment, plastic machinery, office equipment, textile machinery shaft, medical equipment, fitness and sports equipment, etc.
The use of aligning ball bearings
Aligning ball bearings allow the shaft to weave 4 degrees around the bearing center, sealed aligning ball bearings can compensate up to 1.5 degrees.The relative inclination between the center line of the inner ring and the center line of the outer ring shall not exceed 3 degrees.The inner hole of the ball bearing can be cylindrical or conical, and the bearing cannot be separated.
Single row cylindrical roller bearing:
Features:
Single row cylindrical roller bearing roller and raceway line contact, radial load bearing capacity, from the structural point of view, is also suitable for high-speed rotation.Roller from inside or outside
Circle when the edge guides.Single row cylindrical roller bearings are separated, so it is easy to install, disassemble and clean.
USES:
The type (NU,N) of the inner ring or outer ring without guide guard cannot bear axial load and is suitable for free side bearing.The type (NJ,NUP,NH,NF type) of the inner and outer rings with side guard or side guard ring can withstand a certain degree of axial load, so it can be used as a fixed side bearing
Double row cylindrical roller bearings:
Features:
The double row cylindrical roller bearing belongs to the swimming bearing, and its separability makes it easy to install and disassemble.Both rings can be fitted tightly.Double row cylindrical roller bearings are almost not allowed to have an inclination Angle.Double row cylindrical roller bearings have NN type and NNU type, which have the advantages of compact structure, large rigidity, large bearing capacity, small deformation after loading, etc., the cage of this type of bearings is mostly made of solid brass.
Application: double row cylindrical roller bearings are generally used for spindle of machine tools requiring thin wall bearings, rollers of steel rolling machines and cylinders of printing machines.For the machine tool spindle, the bearing with cone hole in the inner ring is mostly used. It is installed on the cone shaft, and the radial clearance is adjusted by the amount of pressure in the inner ring.
Four row cylindrical roller bearings:
Features:
Four row cylindrical roller bearings have compact structure, good rigidity, high radial bearing capacity, but can not bear the axial force.This type of bearing structure is easy to install and use and maintenance, cleaning.
