Features and scope of application of cylindrical roller bearings

Writer： admin Time：2022-06-28

The cylindrical roller is in line contact with the raceway and has a large radial load capacity. Suitable for both heavy loads and shock loads, as well as high-speed rotation. Cylindrical roller bearing raceways and rolling elements are geometric. After the improved design, it has higher bearing capacity. The new structural design of the rib and the roller end face not only improves the axial bearing capacity of the bearing, but also improves the lubrication conditions of the contact area between the roller end face and the rib. performance of bearings. So here are its five major advantages:

1. The roller and the raceway are in line contact or trimmed line contact, and the radial bearing capacity is large, which is suitable for bearing heavy loads and impact loads.

2. The friction coefficient is small, suitable for high speed, and the limit speed of precision bearings is close to that of deep groove ball bearings.

3. Type N and Type NU can move axially, and can adapt to changes in the relative position of the shaft and the housing caused by thermal expansion or installation errors, and can be used as free end support.

4. The processing requirements for the shaft or seat hole are relatively high. After the bearing is installed, the relative deflection of the outer ring axis should be strictly controlled to avoid contact stress concentration.

5. The inner ring or outer ring can be separated for easy installation and removal. Cylindrical roller bearings are also widely used, such as large and medium-sized motors, locomotives, machine tool spindles, internal combustion engines, generators, gas turbines, gearboxes, rolling mills, vibrating screens, and hoisting and transportation machinery.

Cylindrical roller bearings can be divided into different structures such as single-row, double-row and multi-row cylindrical roller bearings according to the number of rows of rolling elements installed. Different structural bearings are also reflected in the design of the position of the rib. Among them, the commonly used cylindrical roller bearings have the following forms:

Single-row cylindrical roller bearings: Single-row cylindrical roller bearings are separable bearings, which are easy to install and disassemble. Both rings can be tightly fitted, and the contact line between the rollers and the raceway is corrected to reduce stress concentration.