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1 of the requirements of the relevant parts of the host
High-speed bearings require bearings where the rotation system precision dynamic balance shaft bearing seat hole installation site should be higher than the general requirements of dimensional accuracy and geometrical accuracy, Wuhan SKF bearings, especially concentricity and retaining shoulder seat hole or The verticality of the journal when considering these issues, the same must be noted that high-speed bearing operation factors and high temperature factors.
The shaft bearing system requires both a high rigidity, and the quality requirements to be as light as possible, To overcome this contradiction, can take measures such as reducing the surface roughness and improve surface hardening to improve the supporting rigidity of the hollow shaft in order to reduce the quality of the system, etc..
2 high-speed bearings with clearance due to the high-speed bearings, both according to the high-precision bearing requirements, but also the requirements for high temperature bearings, so consider fit and clearance to take into account the following two points:
(1) a high speed centrifugal force caused by the force system change and shape change;
(2) raised from room temperature to the high temperature dimensional change and hardness change.
In short, high-speed, high-temperature conditions, from the choice of co-ordination and clearance to strive to maintain the accuracy and performance of the bearing, which is difficult.
In order to ensure the bearing after installation of the raceway small deformation, the amount of interference of the interference fit can not be made too large, and under high speed centrifugal force and under the high temperature thermal expansion, or the offset of the method to the pressure of the mating surfaces. Or the mating surface relaxation, and therefore the amount of interference must be calculated carefully considered the above two factors, the effective amount of interference for high-speed bearings may be ineffective in normal temperature and velocity.
If the calculation results of this contradiction is too large (usually only in the ultra-high speed makes this case), only to take the ring under lubrication method and hydrostatic lubrication with double lubrication, and this program has the potential to bearing dmn value breakthrough 3 million mark.
The high temperature thermal expansion, or the offset of the method to the pressure of the mating surfaces. Mating surface relaxation or so, so the amount of interference must be calculated carefully considered the above two factors, Wuhan skf bearing constant velocity at room temperature under effective amount of interference for high-speed bearings may be invalid.
If the calculation results of this contradiction is too large (usually only in the ultra-high speed makes this case), only to take the ring under lubrication method and hydrostatic lubrication with double lubrication, and this program has the potential to bearing dmn value breakthrough 3 million mark.
Considering the high speed bearing clearance should not only consider the above factors, but also to consider the axis the thermal elongation clearance, bearing in working condition, that have the best clearance in the working temperature, which The kinds clearance the inner and outer race ball groove centers formed accurately the state of the bit. High speed bearing and strive to reduce the relative sliding and internal friction, it is best not to adjust the clearance of the ball bearings on the inner and outer ring relative axial dislocation.
Consider the bearing with the amount of interference and clearance, to note that the material becomes soft and easily deformed features, as well as several high temperature from room temperature to the temperature change caused by the possibility of certain permanent deformation at high temperatures.
| Product Model | Inside Diameter | Outside Diameter | Thickness |
| 7222CTYNP5 NSK | 110 | 200 | 38 |
| 7221ATYNP5 NSK | 105 | 190 | 36 |