Several types of bearings
Deep groove ball bearings, angular contact ball bearing, four-point contact ball bearing, self-aligning ball bearings, tapered roller bearings, cylindrical roller bearing, spherical roller bearing of this a few kinds of bearing are compared in, use common, model ten thousand kinds, below we briefly introduce you, this a few kinds of bearing structure, advantages and using industries limited.
Deep groove ball bearing
The most representative rolling bearings, widely used.Accept radial load and bidirectional axial load.It is used for high speed torsion and low noise and vibration.Sealed bearings with steel plate dust cover or rubber seal ring are pre-filled with excessive smooth grease, outer ring with a stop ring or flange bearing, which is easy to axial positioning, and convenient for the device in the shell.The size of the maximum load bearing is the same as that of the standard bearing, but there is a filling groove in the inner and outer ring, and the number of balls is added, which improves the maintenance frame and steel plate stamping maintenance frame (waveform, crown...Single row;S form...Double row)
Copper alloy or phenolic resin cutting frame, the composition of resin forming frame.
Automotive: rear wheel, transmission, electrical installation parts
Electrical: general electric, household appliances
Others: instruments, internal combustion engine, construction machinery, railway rolling stock, loading, unloading and handling machinery, agricultural machinery, all kinds of property machinery
Angular contact ball bearing
The contact Angle between the ring and the ball is 15°, 30° and 40°. The larger the contact Angle, the greater the axial load, and the smaller the contact Angle, the better the high-speed torsion.Single row bearing can accept radial load and one-way axial load, DB combination, DF combination and double row bearing can accept radial load and two-way axial load, DT group is suitable for the use of one-way axial load is large, the additional load of a single bearing is insufficient.High speed ACH bearing ball diameter is small, ball number is large, mostly used for machine tool spindle;Angular contact ball bearings are used for high speed and high precision torsion. The two single row angular contact ball bearings with reverse configuration share inner ring and outer ring. They can accept radial load and two-way axial load.
The first used to adhere to the frame: steel plate stamping adhere to the frame (bowl shape...Single row;S, crown...Double row), copper alloy or phenolic resin cutting frame, the composition of resin forming frame.
Single column: machine tool spindle, high frequency motor, gas turbine, centrifugal separator, small car front wheel, differential pinion shaft.
Double column: oil pump, roots blower, air compressor, all kinds of transmission, fuel pump, printing machinery.
Four point contact ball bearing
Accept radial load and bidirectional axial load.Single bearing can replace the angular contact ball bearing with front or back combination.It is used to accept the pure axial load or the component load with a large axial load. When the bearing receives any biased axial load, it can form a contact Angle () among them, so that the contact between the ring and the ball is always positive and negative on any contact line.
The first suitable frame: copper alloy cutting frame.
Primary use: aircraft jet engine, gas turbine.
Aligning ball bearing
Because the raceway surface of the outer ring is spherical and has the centering function, it can actively adjust the axis deviation caused by the deflection of the shaft or the shell or the diverging center. The tapered hole bearing can be conveniently installed on the shaft through the use of fasteners.
Steel stamping stand: chrysanthemum...12, 13, 22...2 rs, 23...2RS, kwai...22, 23
Use: carpenter machinery, textile machinery transmission shaft, vertical seat adjustable center bearing
Cylindrical roller bearing
Cylindrical roller and race is line contact, radial load can be big, that is applicable to accept heavy load and shock load, also used for high speed reverse N type and NU type axial move, can adapt to or device error provoked by thermal expansion shaft and shell the change of relative position, the adaptation is used as the free end bearing NJ type and NF type acceptable level inevitably axial load in one direction, NH and NUP acceptable levels of necessarily bidirectional axial load, inner ring or outer ring do not facilitate installation NNU model and NN model of radial load resistance strong rigidity, mostly used for machine tool spindle.
The first application of the support frame: steel stamping support frame (Z shape), copper alloy cutting support frame, pin type support frame, resin forming support frame.
Primary use: medium and large electrical, generator, internal combustion engine, steam turbine, machine tool spindle, deceleration installation, loading, unloading and handling machinery, all kinds of property machinery.
Solid type needle roller bearing
The basic structure of the bearing with inner ring is the same as that of the NU cylindrical roller bearing, but because of the needle rolling, the volume can be reduced, and can accept a large radial load without inner ring bearing, the shaft with appropriate precision and hardness of the device surface as raceway surface to use.
The first used to adhere to the frame: steel plate stamping adhere to the frame.
Primary USES: car starter, gearbox, pump, excavator crawler, elevator, bridge crane, winch.
Tapered roller bearing
This type of bearing is equipped with round - table roller, which is guided by the inner ring.In the design, the inner ring raceway surface, outer ring raceway surface and the cone surface of the roller rolling surface are arranged at a point on the bearing center line.
Single row bearing can accept radial load and one-way axial load, double row bearing can accept radial load and two-way axial load.
It is used to accept heavy load and impact load. According to the divergence of contact chest (), it is divided into three types: small cone Angle, middle cone Angle and large cone Angle. The larger the contact Angle, the greater the axial load.The outer ring and the inner assembly (the inner ring and the roller and the holding frame assembly) can be separated, easy to assemble and disassemble, the rear auxiliary code "J" or "JR" bearing has international exchange.This kind of bearing still USES British system series product more.
The first used to adhere to the frame: steel stamping adhere to the frame, the composition of resin forming adhere to the frame, pin type adhere to the frame.
Primary use: automotive: front wheel, rear wheel, transmission, differential pinion shaft.Machine tool spindle, construction machinery, large agricultural machinery, railway vehicle gear reduction installation, rolling mill roll neck and reduction installation.
Aligning roller bearing
In these bearings are of spherical raceway outer ring and double groove between the inner ring is equipped with spherical roller, according to the differences of internal structure, divided into R, RH, RHA and SR four type, because of the outer ring raceway arc among middle and bearing are consistent, with the heart function, and thus can be adjusted because of the shaft or shell buckling or divided heart provoked axis is not straight.Accept radial load and bidirectional axial load.Especially, radial load can be large, used to accept heavy load and impact load
Tapered bore bearings can be mounted and dismounted on the shaft by means of fasteners or unmount sleeves.
Tapered holes are of the following two types (taper) :
1:30 (assistant code: K30)......Used for 240, 241 series.
1:12 (assistant code: K)......Used in other series.
Oil hole, oil groove and positioning pin hole (one) can be arranged on the outer ring.Oil hole and oil groove can also be opened on the inner ring.
The first application of the support frame: copper alloy cutting support frame, steel plate stamping support frame, pin type support frame, resin forming support frame.
Primary USES: papermaking machinery, reduction installation, railway rolling stock axle, rolling mill gear box seat, rolling mill roller table, cracking machine, vibrating screen, printing machinery, carpenter machinery, all kinds of property reducer, vertical belt seat centering bearing.