Introduction to the basic installation of roller bearings

1) Wash the bearing with kerosene, press it into the bearing seat, fill the rollers of the outer ring of the bearing with Shell No. 3 lithium base grease to two-thirds full, use clean hands to modify evenly, install the ntn bearing gland, and use The tightening bolt of the bolt anti-loosening glue presses the bearing gland;

2) The bearing is a cylindrical roller bearing with separable outer and inner sleeves, and the inner bearing should be sleeved on the rotating shaft and in place;

3) Install the bearing seat on the housing, if there is a grease injection hole, align the position. Tighten the bearing seat with fastening bolts coated with bolt anti-loosening glue;

4) Install the front and back side pain block on the shaft and place it in place. If there is a shaft key, install the shaft key into the keyway and then install the outer side pain block, and install the shaft retaining ring on the shaft;

5) Tighten the fastening bolts of the migraine block, rotate the adjustable migraine block to reach the position of the viewpoint before removal, and tighten the fastening bolts. After the above assembly is completed, the shaft should have a certain axial series movement;

6) The protective covers at both ends of the upper oscillating motor are fastened with screws.

The damage of the roller bearing can be said to be equal peeling, indentation, corrosion, cracks, wear, etc., which will be reflected in the vibration measurement of the roller bearing. Therefore, the roller bearing manufacturer can measure the size of the oscillation through the use of a special bearing oscillation measuring device, and the specific abnormal situation can be inferred through the frequency dispersion. The measured value is different due to the operating conditions of the roller bearing or the position of the sensor device, so it is necessary to analyze and compare the measured value of each machine in advance to determine the judgment standard.

Roller bearing maintenance: thin oil is smooth: the advantage is that the internal conflict coefficient is small, so it is less costly to overcome conflicts, the thin oil has good fluidity, it is easy to enter the conflict surface of each smooth point, has an outstanding cooling effect, and can adhere Impurities on the surface of the conflict and metal particles produced by grinding are carried away. The defect is that the oil film cannot withstand a large unit pressure and has high requirements for sealing. High-speed presses generally use large-flow thin oil for smoothness, which can take away the heat generated by the conflicting pairs.

　　 The correct use of roller bearings can achieve fatigue life. But if accidental early damage occurs, it can no longer be used. Different from exhausted lifespan, this early damage is called a fault or accident. It is mostly caused by inadequate consideration of equipment, operation, and smoothness, foreign matter intruding from the outside, or lack of research on shafts and bearing seats.

The damage state of the bearing, such as the abrasion of the ring rib of a roller bearing, may be caused by lack of smoothing agent, improper grade, defective oil supply and discharge structure, foreign matter intrusion, bearing device error or excessive shaft deflection. It may also be caused by a combination of the above-mentioned reasons.

　　 Therefore, it is difficult to know the cause of the damage only by querying the bearing damage. However, if we clarify the situation before and after the fault occurs on the basis of a full understanding of the machinery, working conditions and external structure of the bearing, and analyze the damage of the bearing and a variety of related reasons, we can prevent the same fault from happening again.

From the name of the roller bearing, you can guess what it looks like. The outer ring of the roller bearing adopts a full-complement cylindrical roller bearing with a thicker outer ring wall. The outer diameter of the roller has a cylindrical shape and an arc shape. According to the application, it is designed to cooperate with the raceway surface. With this outer ring, the roller can roll directly on the raceway and can withstand heavier loads and impact loads. Its advantage is that the internal conflict coefficient is small, so it costs less to overcome conflicts, the thin oil has good fluidity, and it is easy to enter the conflict surface of each smooth point. It has an outstanding effect and can remove the impurities adhering to the conflict surface and because of grinding. The produced metal particles are taken away.