Spherical Roller Bearings Introduction
Spherical roller bearings with two rollers, mainly bear radial load, but also can withstand axial load in either direction . A high radial load capacity, especially suitable for heavy work loads or vibration , but can not afford pure axial load . This kind of bearing outer ring raceway is spherical shape, so aligning its good performance, can compensate concentricity error .
There are two symmetrical spherical roller , there is a common spherical outer ring raceway , and the bearing inner ring with two axis tilt angle of the raceway, aligning with good performance , when the axial force bent or install a different heart while still bearing the normal use , transfer concentric with the bearing dimension series varies , generally allow aligning angle is 1 to 2.5 degrees , the larger the load bearing capacity of this type , in addition to radial load bearing can withstand two-way axial load acting , with good impact resistance , self-aligning roller bearings in general allowed operating speed is low.
Spherical roller bearings divided by roller -sectional shape of the spherical roller symmetrical and non- symmetrical spherical roller two different structures , asymmetric spherical roller bearings are early products , the key is for the host service , new design when the host is rarely chosen symmetrical spherical roller bearings, internal structure has been completely improved design and parameter optimization, and early -aligning roller bearings produced compared to withstand greater axial loads , these bearings run lower temperature , it can be adapted to the requirements of high speed , can be divided into two kinds of type C and CA inner cage wall and used according to the presence or absence
Spherical Roller Bearings Type:
Spherical roller bearings divided into: cylindrical bore , tapered bore.
Tapered bore taper 1:12, respectively, after the code for the K -aligning roller bearings ( 153000 or 113000 Type type ) and 1:30 post code for the K30-aligning roller bearings. Such bearings and shaft with a conical inner ring can be adjusted along the axial movement of the bearing radial clearance .
Spherical roller bearings post code :
The post code for K, K30 tapered bore spherical roller bearings , mounted on an adapter sleeve to match , then a post code for the K + H type and K30 + H bearing . Such bearings can be mounted on the optical axis of the shaft shoulder does not apply to the need for frequent mounting and dismounting of bearings occasions. In order to improve the lubricity of the bearing, the bearing outer ring tank car and three drill hole evenly distributed , then set code of W33.
Specific categories and Designation :
1 , spherical roller bearings (20000 CC type )
2 , tapered bore spherical roller bearings (20000 CCK type )
3 , self-aligning roller bearings (20000 CC/W33 type )
4 , tapered bore spherical roller bearings (20000 CCK/W33 type )
5 , mounted on an adapter sleeve hole Spherical Roller Bearing (20000 CCK + H0000 model )
6 , mounted on an adapter sleeve hole Spherical Roller Bearing (20000 CCK/W33 + H0000 model )
Spherical roller bearings installed
Spherical roller bearings have two raceways between the inner and outer ring raceway is spherical , equipped with a drum -shaped roller bearings. Outer ring raceway curvature center and bearing center line, so has the same self-aligning ball bearing self-aligning feature. When the shaft , casing deflection occurs , you can automatically adjust load and axial load in two directions . Radial load capacity, suitable for a heavy shock load conditions . Inner diameter is tapered bore bearings can be installed directly . Or use an adapter sleeve , remove tube installed in the cylinder axis. Cage with steel stamping cage, forming polyamide cage and copper alloy machined cage .
For the self-aligning bearing, when the bearing into the housing bore with the shaft intermediate the outer mounting ring prevents the tilt and rotation. It should be remembered that some dimensions of self-aligning ball bearing ball protruding from the side of the bearing, so the middle of the ring should be installed recessed to prevent damage to the ball . Generally a large number of bearings pressed into mechanical or hydraulic installation method .
For separable bearing inner ring and outer ring can be installed separately , thus simplifying the installation process , especially when the inner and outer rings are especially required interference fit . In the inner ring has been installed in place of the shaft into the outer ring of the bearing box included , must pay attention to see whether the right of the inner and outer rings in order to avoid scratching the bearing raceways and rolling elements . If the cylindrical and needle roller bearings without inner flange or side wall of the inner flange edge has recommended installation sleeve . The outer diameter of the sleeve should be equal to the diameter of the inner ring raceway F, machining tolerances should d10. Needle roller bearings is best to use a mandrel installation.
Spherical roller bearing cage and its use
Mainly used to maintain frame: sheet steel cage ( suffix E), glass fiber reinforced polyamide 66 cage ( suffix TVPB), machined solid brass cage ( suffix M), vibration occasions stamping steel cage ( suffix JPA )
Main purpose : paper machinery , deceleration devices , railway vehicle axles, gear box bearing rolling mill , rolling mill rolls , crusher, vibrating screen, printing machinery , woodworking machinery, all kinds of industrial gear , vertical seat belt aligning bearings