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/*728*90 created on 2018/5/16*/ var cpro_id = "u3440131"; Home>Bearing knowledge>FAG bearing equipment: fixed swimming support FAG bearing equipment: fixed swimming support
Because of the manufacturing error; the spacing between the shafts supported by the two radial bearings and the intermediate spacing of the bearing housings are generally not completely flat; the increase in operating temperature also causes this spacing to be changed; thus the swimming bearing is required to compensate for this error. /*250*250 was created on 2017/12/25*/ var cpro_id = 'u3171089';
N-type and NU-type cylindrical roller bearings are aspirational swimming bearings; the rollers and cages of such bearings can move in the raceway without the rim of the bearing.
Other types of bearings only work as a floating bearing when the ferrule is loosely engaged; for example, deep groove ball bearings and spherical roller bearings. Therefore, the bearing ferrules are generally loosely cooperative under the point load effect; Mostly the outer ring.
Conversely; fixed-end bearings have the effect of axial orientation of the fixed shaft and the ability to accept external axial forces. For rotating shafts with two bearings attached; only one bearing is used as a fixed-end bearing to prevent harmful preloads.
Which type of bearing is chosen as the fixed end bearing depends mainly on the size of the axial load and the unevenness of the axial positioning accuracy requirement.
For example, the choice of a double row angular contact ball bearing allows for tighter bearing positioning than the use of a deep groove ball bearing or a spherical roller bearing. When a symmetrically placed pair of angular contact ball bearings or cylindrical roller bearings are used as fixed bearings The axial positioning effect is the best.
The advantages of the universal layout angle touch ball bearing are even more outstanding; these bearings do not require the addition of a high-speed washer to be able to be combined into an O-shaped arrangement (back-to-back or narrow side of the inner ring) or X-shaped placement (face to face or inner ring wide side) Therefore, when a general layout angle touch ball bearing is combined into an O-type or an X-type arrangement, an axial small clearance (UA type), a zero clearance (UO type) or a small preload (UL type) can be obtained.
The general layout type spindle bearing (UL type) device also has a light preload when it is placed in an O type or an X type. (Please consult when the demand is large.)
When tapered roller bearings are used as fixed bearings (N11 type layout), they are also convenient to install. They are matched according to the corresponding axial clearance; no setting or adjustment is required during operation.
In the gearbox; in order to play the role of a fixed bearing; sometimes a four-point touch ball bearing is directly placed next to a cylindrical roller bearing. The four-point contact ball bearing without support in the outer ring is only required to bear the axial force; radial The force is taken up by cylindrical roller bearings.
When the axial load is small; NUP cylindrical roller bearings can also be used as a fixed bearing.
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FAG bearing equipment: fixed swimming support
Source: China Bearing Network Time: 2017-10-15