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Device for four-row cylindrical roller bearing in imported rolling mill bearing
Source: China Bearing Network Time: 2018-03-20
| /*250*250 was created on 2017/12/25*/ var cpro_id = 'u3171089'; |
The cooperation between the labyrinth ring and the roll neck is usually a tight dynamic cooperation; the device needs to be slammed with a copper rod. The two sides of the labyrinth ring need to be parallel and closely fit with the shaft shoulder and the inner ring of the bearing.
(2) The cooperation between the inner ring and the roll neck of the four-row cylindrical Zizi bearing in the inner ring of the device is an interference cooperation; the inner ring should be heated to 90-100 ° C first. Do not exceed 120 ° C; to avoid the inner ring after cooling Retraction is not complete. Heating method can be heated by oil tank or induction heating; surely stop heating with open flame.
The increase in the inner diameter when heating with the oil sump is calculated according to the following formula:
Δd=12. 5×10-6Δt. d
Where: â–³d--the inner ring inner diameter is increased after heating (mm)
△t--the difference between oil temperature and room temperature (°C); room temperature specification is 20 °C.
D--inner inner diameter (mm)
In the case of the FCD type and other double inner rings; in the process of cooling the inner ring, it is necessary to make the inner ring and the inner ring in the axial direction; the inner ring is attached to the end face of the labyrinth ring; and the feeler is used for inspection.
(3) The outer ring of the four-row cylindrical roller bearing of the outer ring of the device and the inner hole of the bearing seat are usually the transitional cooperation; for the smaller type of bearing; the outer ring and the whole of the roller and the bracket are slammed with copper rods. Into the bearing housing. For larger bearings; use the outer ring or the lifting holes provided on the bracket; lift the outer ring and outer ring assembly; straight down into the bearing box.
For FCDP type four-row cylindrical roller bearings with live ribs; side retaining ring, outer ring assembly, middle retaining ring; the same type of bearing should not be exchanged.
The I, II, III, and IV symbols on the end face of the outer ring are the marks of the load zone (see Figure 1). When the primary device is used; the direction of the rolling load should be aligned with the first symbol; Let the rolling load be sequentially aligned with other symbol marks; to extend the bearing life.
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