Explanation of self-aligning ball bearings
1.What is a self-aligning ball bearing?
A self-aligning ball bearing is a FAG bearing with spherical balls installed between the outer ring of the inner ring box of the two raceways and the spherical surface of the raceway. The outer diameter of the self-aligning function bearing and the inner diameter of the bearing seat are spherical, and there is an active self-aligning function between the two, which can compensate for the misalignment of the axis caused by the device error and the deformation of the device bottom surface.
2. Two structures of self-aligning ball bearings
1) Cylindrical hole
①Because it has two rows of steel balls and a curved raceway in the outer ring, self-aligning ball bearings can be self-aligned.
② It can accept the point of view error between the shaft and the bearing seat, and is suitable for the working condition that simply presents the shaft deflection and misalignment caused by the misalignment of the shaft center.
③ Friction is the lowest among all rolling bearings.
④ Even at high speeds, there is still only a small temperature rise.
2) Conical hole
① Tapered hole self-aligning ball bearing has the characteristics of cylindrical hole self-aligning ball bearing.
②Because the clearance of the bearing can be fine-tuned, this type of bearing is mostly used on the double-supported shaft with large tortuous under the load effect and in the parts where the two support seat holes cannot ensure strict concentricity.
③ Mainly used to accept radial load, but also accept a small amount of axial load.
④ Generally, pure axial load cannot be accepted. The versatility of this type of bearing is second only to deep groove ball bearings.
⑤ Its limit speed is lower than that of deep groove ball bearings of the same standard, but its load capacity is higher than that of deep groove ball bearings.
3.The characteristics of self-aligning ball bearings
1) The outer ring raceway is spherical and has self-aligning properties.
Even if the inner ring, the steel ball and the cage are slightly skewed relative to the outer ring (but the relative inclination of the inner and outer rings should not exceed 3 degrees), they can still rotate; therefore the bearing is self-aligning, independent of the shaft relative to the bearing box Impact of misalignment
2) It can bear larger radial load and certain axial load.
The load capacity is great. Because the internal structure of the outer spherical ball bearing is the same as the 6200 and 6300 series of deep groove ball bearings, the IB seated outer spherical ball bearing can not only accept radial loads, but also accept larger axial loads. At the same time, bearing operation noise is low.
3) Long service life.
Long service life Spherical ball bearings with seat are generally used in harsh operating environments such as dirt, dust, humidity, and high temperature. The smooth grease inside the bearing will change in a short period of time. Therefore, it is necessary to grease the outer spherical ball bearing with a seat within a proper time and distance to make it smooth again, and replace the degenerated smooth grease with fresh smooth grease. IB cast iron outer spherical ball bearings are equipped with grease nipple, which can be smooth from the beginning to ensure perfect function and long service life in any operating environment.
4) Good sealing function.
The outer spherical ball bearing with excellent sealing function is equipped with heat-resistant, oil-proof rubber sealing ring and steel plate dust cover combined sealing on both sides. The dust cover is installed on the outer diameter of the inner ring of the bearing and rotates with the inner ring, which can effectively prevent foreign matter from entering the inside of the bearing, and can protect the bearing against external pressure. This combined seal composed of the sealing ring and the dust cover can hinder Dirt, dust, and water enter the bearing, and together can prevent the smooth grease inside the bearing from leaking. The bearing can adhere to the perfect operation function application field even in the harsh working environment.
5) Generally, pure axial load cannot be accepted
Suitable for those bearings that can cause considerable shaft deflection or misalignment, such as fine appearance, low-noise motors, automobiles, motorcycles, woodworking machinery, transmission shafts of textile machinery, mining machinery, electromechanical equipment, plastic machinery , Work equipment, medical equipment, fitness and sports equipment and general machinery.