Precision class of bearing
Precision class of bearing
PRODUCT
Bearing box floating labyrinth seal
by：Waxing
2020-09-10
Labyrinth seal is between the axis and shell, with several sequential small clearance of concave and convex tooth ring seal, the sealing between gear and shaft to form a series of throttling clearance and expansion of cavity, splash of lubricant every through a sealed teeth, will encounter a lot of resistance, resulting in a throttling effect, make the speed of the lubricant weakening, weakened after the lubricant flows along the seal the inner side of the tooth to the lower part of the ring cavity, and then, through to the lower part of the ring cavity oil return hole returned bearing indoors, to prevent the lubricant leakage.
Generally have common labyrinth seal axial and radial seal, seal, such as floating seal and composite seal type, this kind of structure is particularly suited to prevent the lubricant of high-speed shaft leakage.
Can imagine, if the seal number of teeth enough, so, no matter how fast the lubricant splash speed can be totally sealed effect, but in fact, increase sealing teeth purpose, makes the axial size increases, so too much additional sealing tooth on the device it is almost impossible.
In order to improve the sealing effect of labyrinth seal, in principle for the clearance between the shaft and sealing teeth as small as possible.
Oil leakage failure reasons: of labyrinth seal teeth badly worn or damaged;
The bearing chamber oil level on the high side;
The labyrinth seal and shaft clearance is big;
Oil seal and bearing chamber seal on the back of lax;
When installation, the position of the oil seal oil return hole is not correct or jam, etc.
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