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DESIGN OF 轴承内部结构 |
Housing
Bushes
The housing bore should have a chamfer fGx20°±5°,This
chamfer makes it easier to press the bushes into the
housing.
Housing
bore
diameter dG |
Chamfer
with fG |
| dG≤30 |
0.8±0.3 |
| 30<dG≤80 |
1.2±0.4 |
| 80<dG≤180 |
1.8±0.8 |
| 180<dG |
2.5±1.0 |
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Flange Bushes
The radius at the transition from the radial to the axial
component must be taken into consideration for flange
bushes. A sufficiently large chamfer must be provided on the
housing to prevent the flanged bushes fouling in the area of
the radius. Sufficient support must be provided for the
flange in applications with axial loading.
Housing
bore
diameter dG |
Chamfer
with fG |
| dG≤10 |
1.2±0.2 |
| 10<dG |
1.7±0.2 |
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Shaft
o make fitting easier, the shaft
ends should be chamfered. All sharp edges which could damage
the sliding layer must be broken. Higher surface qualities
will extend the service life only slightly whereas greater
roughness depths will reduce the service life considerably.
Ground or drawn surfaces are preferred. The surface finish
of the mating material should be between Ra 0.2- Ra0.8 um
obtained by grinding normally. |
incorrect
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correct
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Seals
If increased levels of contamination occur or the bearing is
used in an aggressive environment, the bearing position
should be protected. The usual solution is to design the
surrounding structure so that the contamination cannot reach
the bearing position. A collar of grease may also be used or
shaft seals if the level of contamination is particularly
high.
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