Низкий уровень шума подшипник двигателя цилиндрический роликовый NJ208

1. Cylindrical roller and raceway are in line contact or trimmed line contact, with large radial bearing capacity, suitable for bearing heavy load and impact load.

2. N type and NU type can move axially, which can adapt to the change of the relative position of the shaft and the shell caused by thermal expansion or installation error, and can be used as free end support.

3. The processing requirements for parts such as shafts or seat holes are relatively high. After the bearing is installed, the axis of the outer ring is relatively skewed, which should be strictly controlled to avoid contact stress concentration.

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

5. Cylindrical roller bearings are separable bearings, the inner ring or outer ring can be separated for easy installation and disassembly.

China bearing cylindrical roller bearing single row

There are two common ways of correct installation of cylindrical roller bearings: one is cold installation and the other is hot installation.

1. Cold installation

When installing a small bearing that is not too tight, you can use a sleeve and hammer the sleeve to lightly tap the sleeve to install the bearing in a proper position. When knocking, it should act on the cylindrical roller bearing ring as evenly as possible to prevent the bearing from tilting or skewing. Most cylindrical roller bearings are mounted using the press-fit method. If the inner and outer rings of the cylindrical roller bearing are to be installed on the shaft and the housing at the same time, it must be ensured that the same pressure acts on the inner and outer rings at the same time, and must be on the same plane as the contact surface of the installation tool.

2. Hot installation

Typically, installation of larger bearings is not possible without heating the bearing or housing, because as size increases, more force is required to install. The temperature difference between the cylindrical roller bearing ring and the shaft or housing required for hot mounting depends primarily on the interference and the diameter of the bearing fit. The heating temperature of the open bearing shall not exceed 120℃. It is not recommended to heat cylindrical roller bearings with seals and dust caps above 80°C (make sure that the temperature does not exceed the temperature allowed by the seals and grease). When heating the cylindrical roller bearing, it should be heated evenly, and there must be no local overheating.

Uses of cylindrical roller bearings: 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.