Slewing rings calculation method

[Slewing rings calculation method:

 The same dimensions of slewing backing bearings  single-row cross roller bearing capacity than type and double-row ball.
In overturning moment load 160 t m or less, use a single-row ball slewing bearing its price higher than the three-row slewing pillar, as the preferred form. When the overturning moment above 160 tons of rice should be given precedence optional three-row slewing column.

Static selection:

Static reference load Fa 'and M' is calculated
 Single-row four point contact ball
Single-row four-point contact ball slewing bearing selection calculation according to the bearing angle of 45 ° and 60 ° two cases.
I, a = 45 ° Ⅱ, a = 60 °
Fa '= (1.225 · Fa +2.676 · Fr) · fs Fa' = (Fa +5.046 · Fr) · fs
M '= 1.225 · M · fs M' = M · fS
Then on the graph to identify the above two points, one point below the curve.
 Single-row cross roller
Fa '= (Fa +2.05 · Fr) · fs
M '= M · fs
Reducing double ball
For double Reducing ball slewing bearing selection calculation, when Fr ≤ 10% Fa when, Fr negligible. When Fr> 10% Fa must be considered when the pressure inside the raceway angle changes, the calculation please contact us.
Fa '= Fa · fs
M = M · fs
 three-row roller
Three-row roller slewing bearing selection, only the axial load and overturning moment raceway role in the calculation.
Fa '= Fa · fs
M '= M · fs