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/*728*90 created on 2018/5/16*/ var cpro_id = "u3440131"; Home>Bearing knowledge>Parameters for bearing bearing capacity Bearing bearing parameters
The bearing life is used to select the bearing; it is based on the bearing loadability parameters; the bearing operates at very low speed (n < 10 rev / min) under load; and only requires a very short life (in this case) For example, according to a given load equivalent P; then calculate a very low necessary extra dynamic load C according to the life cycle equation; so the bearing selected according to the life number will be seriously overloaded in practice;) In the transition; and in addition to the normal operating load; also have to accept heavy shock load. /*250*250 was created on 2017/12/25*/ var cpro_id = 'u3171089';
Equivalent static load: Static load is necessary according to its corresponding radial and axial load; the equivalent static load is calculated. The equivalent static load refers to the effect on the bearing (radial effect on the radial bearing; or axial effect on the thrust) On the bearing); will form the maximum roll load that has the same effect as the actual load.
The equivalent static load Po can be derived from the following general formula: Po=XoFr+YoFa
In the calculation of Po; should take the maximum load that can occur; substitute its corresponding radial and axial loads into the above formula. If the static load is in different directions on the bearing; its corresponding radial and axis The size of the load will be changed. In these cases; the corresponding radial and axial loads that will cause the maximum equivalent static load Po should be applied.
Po=equivalent static load; KN
Fr=practical radial load; KN
Fa=practice axial load; KN
Xo = radial load factor Yo = axial load factor low speed (usually n < 10 r / min) Slowly reciprocating rocking; insist on stopping under long-term effects of the load. The bearing receives the load together in a slow swing or centering transition,
Regarding the bearing in the transition (accepting dynamic stress) or in the stopped state; the effect load only in a short time; it is also necessary to check the associated safety factor; including the impact load or the maximum load.
Fundamental additional static load ISO 76:1981 specification; equivalent to the intermediate position of the heaviest roller and track touch; the calculated touch stress:
Active self-aligning ball bearing is 4600Mpa
All other ball bearings are 4200Mpa
All roller bearings are 4000Mpa
Under this stress, the eternal deformation of the rolling body and the raceway is formed; about the diameter of the rolling body is 0.000001. Regarding the radial bearing; the load is a pure radial load. . .
The allowable load of the bearing is not dependent on the fatigue of the data; rather, the degree of eternal deformation of the load on the bearing raceway. The effect of the load on the stopped bearing, perhaps the slowly swaying bearing, or the effect on the rotating bearing Impact load; the flattened appearance on the rolling body and the collapse of the raceway. How much damage these bearings can have on the function of the bearing depends on the need for the bearing in the detailed application. The spread of the depression on the raceway Can be irregular; can also be evenly distributed corresponding to the orientation of the roll body. If the load is adhered for several rotations; then the depression will spread evenly over the entire raceway. The permanent deformation of the bearing will cause oscillation and noise. And add conflicts. And can increase the internal clearance, perhaps change the cooperation between the components. Therefore; in order to satisfy any of the above requirements; it is necessary to ensure that the permanent deformation will not occur or may only reach a very limited extent, This; the selected bearings must have a high enough static load: high reliability; quiet operation (such as used in electric motors) Non-oscillating operation (such as used in machine tools); stable bearing conflict torque (such as used in measuring appearance and inspection equipment); low launch conflict under load (such as in cranes). When selecting bearing scales based on static load A given safety factor s0 is used. This safety factor represents the relationship between the fundamental additional static load C0 and the bearing equivalent static load P0.
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Bearing bearing parameters
Source: Bearing network time: 2014-03-06