Installation of tapered bearing

——The problem of cage dryness

Content background: double row and four row tapered roller bearings, because they can bear large radial and axial combined load, and can operate stably with the shaft clearance, meet the requirements of rapid disassembly and assembly, and can be used independently (without auxiliary bearing), which can directly reduce the width of bearing box and roll length, etc., so this type of bearing is widely used by mechanical equipment manufacturers Home's favor, often selected for the mill's backup roll, intermediate roll use.

Due to the cage protruding from the height of the inner and outer rings, during the assembly process, due to the size matching problem of the matching parts, more or less interference will occur, which causes the bearing burning accident, cage wear failure, online shutdown and other faults. In this paper, the matching relationship between the main matching parts and the cage is specially listed, and the matching parts are not listed It's reasonable.

Symbol description:

D1: outer diameter of roll shoulder

D2: inner diameter of convex step in bearing box

D3: inner diameter of small end face of tapered bearing cage

D4: outer diameter of small end face of tapered bearing cage

D5: inner diameter of bearing box gland extension

1.The roller shoulder interferes with the bearing cage

D1 < D3 (normal operation without mutual interference)

D1 = D3 (potential interference)

D1 > D3 (abnormal operation due to interference)

2.The step of inner hole of bearing housing interferes with bearing cage

D2 > D4 (normal operation without mutual interference)

D2 = D4 (potential interference)

D2 < D4 (abnormal operation due to interference)

3.Interference between cover plate extension and bearing cage

D5 > D4 (normal operation without mutual interference)

D5 = D4 (potential interference)

D5 < D4 (abnormal operation due to interference)

4.Recommended size fit range of bearing cage

D1 < D3 (more than 5-10 mm is recommended)

D2 > D4 (more than 5-10 mm is recommended)

D5 > D4 (more than 5-10 mm is recommended)