A, the service life of rolling mill bearing installation of rolling mill bearing, not only related to the quality of the bearing, and install and use the situation there is a close relationship.
Therefore should pay attention to technical requirements of bearing installation, comply with the relevant procedures.
Preparation of 1, before installation,
1)
Before the installation, should the cooperation, including roll neck, bearing housing and bearing ring and bearing box cover plate with surface such as a review, check their size, shape, position precision and cooperate with the public cover is in line with the design of technical requirements.
(
2)
To match the bearing surface, roll neck, bearing box and oil hole edge and burrs must be removed, and clean with lubricating oil.
2, the installation of four row cylindrical roller bearings (
1)
Install the labyrinth ring (
Waterproof set)
The labyrinth ring and roll neck with movable fit for tighter, installation time need copper bar into lightly.
Labyrinth ring two red surface must be parallel with the shaft shoulder and bearing inner ring fit closely.
(
2)
Install the inner ring of four row cylindrical zi child bearing inner ring and roll neck fits for interference fits, when installation should be heated to 90 - the inner circle
100℃。
Do not exceed 120 ℃, in order to prevent the inner ring retraction is not completely after cooling.
Heating oil available heating can also be used in induction heating method, absolutely forbidden to use open flame heating.
With oil tank heating inner diameter increased a lot in the following formula: delta d = 12.
5×10-
6△t。
The d type: delta d - the inner ring diameter after heating of the (
mm)
Delta t - the difference between the oil temperature and room temperature (
℃)
And the standard for the room temperature 20 ℃.
D - the inner ring diameter (
mm)
In the installation of FCD type double inner ring, inside is in the process of cooling must be along the axial inner ring and the inner ring, inner ring and labyrinth ring end face by post, with a feeler.
(
3)
Install the outer ring of four row cylindrical roller bearing outer ring and bearing inner hole for transition fit, for smaller bearing outer ring and roller and cage can be overall knock gently with the rod into the bearing seat.
Available for larger bearings, outer ring or keep the rack with a hole for hoist, hoist, outer ring and outer ring components straight down into the bearing housing.
For with movable guard FCDP type four row cylindrical roller bearings, while retaining ring, outer ring components, retaining ring, in the same type of bearing is unfavorable exchange.
On the outer end face Ⅰ, Ⅱ, Ⅲ, Ⅳ mark is a mark in load.
When first installation use, to make the rolling load direction on the first Ⅰ mark mark, after washing the reload lets rolling load on the rest of the tags in turn, to prolong the service life of bearing.
3, thrust (
Positioning)
The installation of the bearing thrust bearing four corners bearing, double row (
Single row)
Corner corner bearing, two-way thrust taper and cylindrical roller bearing, recently the company has also developed brake roll bearing force bearing.
Four corners bearing, double (
Single)
Row angular contact ball bearing is used as the thrust bearing, are not allowed to be in the radial direction load, so the bearing inner hole corresponding to the bearing assembly parts, its diameter must be bigger than bearing outside diameter 0.
About 5 mm.
Or roller diameter smaller than the bearing inner diameter 0.
About 5 mm.
The four-point contact ball bearing, installation
