Self aligning roller bearing has two rows of rollers, which mainly bear radial load and axial load in either direction. It has high radial load capacity, especially suitable for working under heavy load or vibration load, but can not bear pure axial load. The outer race of this kind of bearing is spherical, so its centering performance is good and can compensate the coaxiality error.

There are two rows of symmetrical spherical rollers, the outer ring has a common spherical raceway, and the inner ring has two raceways inclined at an angle to the bearing axis, which has good centering performance. When the shaft is bent or installed eccentrically, the bearing can still be used normally. The centering performance varies with the bearing size series. Generally, the allowable centering angle is 1 ~ 2.5 degrees, This type of bearing has large load capacity. In addition to bearing radial load, the bearing can also bear axial load with two-way action, and has good impact resistance. Generally speaking, the allowable working speed of self-aligning roller bearing is low.

Self aligning roller bearings are divided into symmetrical spherical roller and asymmetric spherical roller according to the cross-sectional shape of the roller. Asymmetric self-aligning roller bearings are early products. At present, they are mainly used for the maintenance of the main engine. Symmetrical self-aligning roller bearings are rarely used in the new design of the main engine. The internal structure has been comprehensively improved, designed and optimized, Compared with the self-aligning roller bearing produced in the early stage, it can bear greater axial load. The operating temperature of this kind of bearing is lower, so it can meet the requirements of higher speed. According to whether the inner ring has retaining edge and the cage used, it can be divided into type C and type ca. the characteristics of type C bearing are that the inner ring has no retaining edge and adopts steel plate stamping cage, CA Tyrion bearing is characterized by both sides of the inner ring with retaining edges and machined solid cages. In order to improve the lubrication of the bearing, users can be provided with self-aligning roller bearings with annular oil grooves and three oil holes on the outer ring, represented by the bearing rear code / W33. Self aligning roller bearings with oil holes on the inner ring can also be supplied according to users' requirements. In order to facilitate customers' loading, unloading and replacement of bearings, It can also provide self-aligning roller bearing with inner hole taper. The taper of the taper hole is 1:12, and the later code is K. in order to meet the requirements of special users, it can also provide bearing with inner hole taper of 1:30, and the later code is K30. The bearing with inner hole taper can be directly installed on the conical journal with lock nut, The bearing can also be installed on the cylindrical journal with the help of a tightening sleeve or a retracting sleeve. In order to prevent harmful slip between raceway and roller due to centrifugal action during high-speed operation of bearing, the bearing shall bear a certain minimum radial load, which can be estimated according to the following formula:

Self aligning roller bearing has two rows of rollers, which mainly bear radial load and axial load in either direction. It has high radial load capacity, especially suitable for working under heavy load or vibration load, but can not bear pure axial load. The outer race of this kind of bearing is spherical, so its centering performance is good and can compensate the coaxiality error.

Rear code of self-aligning roller bearing:

Install the tapered hole self-aligning roller bearings with rear codes K and K30 on the matching set sleeve to become rear codes K + H and K30 + H bearings. This kind of bearing can be installed on the optical shaft without shaft shoulder, and is suitable for occasions where the bearing needs to be installed and disassembled frequently. In order to improve the lubrication performance of the bearing, an annular oil groove is turned on the outer ring of the bearing and three evenly distributed oil holes are drilled, with the rear code of W33.

Specific classification and model comparison:

1. Self aligning roller bearing (20000 CC type)

2. Tapered hole self-aligning roller bearing (20000 CCK type)

3. Self aligning roller bearing (20000 CC / W33 type)

4. Tapered hole self-aligning roller bearing (20000 CCK / W33 type)

5. Hole self-aligning roller bearing installed on the tightening sleeve (20000 CCK + h0000 type)

6. Hole self-aligning roller bearing installed on the tightening sleeve (20000 CCK / W33 + h0000 type)

The application of self-aligning roller bearings is gradually increasing, especially the long-life bearings in high temperature environment. For different application environments, jXN engineers have developed stj2 steel, which can prolong the service life in a wide temperature range from room temperature to 250 ℃. This steel is the standard material of LH series self-aligning roller bearings. The characteristics of this bearing are as follows (compared with SUJ2). The long-life bearing with large temperature range is 3.5 times longer than that of ordinary materials at room temperature and 30 times longer than that of ordinary materials at high temperature (250 ℃). It can prevent surface damage, 7 times of anti peeling ability, 1.4 times of anti scratch ability, 2.5 times of anti-wear ability and dimensional stability under high temperature, There is almost no size change at 250 ℃, strengthen the strength of fracture fatigue, and double the anti fracture fatigue life under the condition of high temperature and tight fit. Double the anti cracking fatigue strength and simplify the parts storage management procedure. A single standard bearing model can be used from room temperature to 250 ℃, and the automatic self-aligning roller bearing will gradually turn into "LH series".

Automatic of jXN LH series