Installation and adjustment of the high-speed bearings

   When fit and clearance high speed bearing both due to the high-speed precision bearings according to the requirements, but also by high-temperature bearing requirements, so considering its fit and clearance, to take into account the following points:
  (1) a dimensional change and hardness change from normal temperature was raised at a high temperature;
  (2) due to the centrifugal force at high speed, and change in shape.
In short, high-speed, high-temperature conditions, and clearance from the mating choice should strive to maintain the accuracy and performance of the bearing, which is difficult.
 In order to ensure the bearing raceway deformation after installation, angular contact ball bearings over the amount of interference can not get too much interference fit, while the heat under the centrifugal force and high temperature under high-speed expansion, or offset the mating surfaces of the normal pressure. Or the mating surface relaxation, and therefore the amount of interference must be calculated carefully consider the above two factors in the premise, at room temperature constant speed under effective amount of interference for high-speed bearings may be invalid.
   If the result of this contradiction is too large (usually only in the ultra-high speed only in this case), only to take measures to double the lubrication ring lubrication method and hydrostatic lubrication and use, and this program has the potential to break through the miniature ball bearings dmn value 3 million mark. Thermal expansion at high temperatures, or the mating surfaces to offset the normal pressure. Or the mating surface relaxation, and therefore the amount of interference must be calculated carefully consider the above two factors in the premise, at room temperature constant speed under effective amount of interference for high-speed bearings may be invalid.
   If the result of this contradiction is too large (usually only in the ultra-high speed only in this case), only to take measures to double the lubrication ring lubrication method and hydrostatic lubrication and use, and this program has the potential to break through the bearing dmn value 3 million mark. When considering the high speed bearing clearance only to consider the above factors, but also to consider the impact of thermal elongation axis clearance required bearing in working condition, that have the best clearance at operating temperature, and this species clearance is included,the exact center of the outer ring ball groove to the next state formation. Since the high-speed bearings reduce strive relative sliding and internal friction, angular contact ball bearings best not to use the inner and outer rings relative axial displacement method to adjust ball bearing clearance.
   In considering the amount of interference with the flanged ball bearing and the clearance, to be noted that the material becomes soft and easily deformable features, and many times from room temperature to high temperature changes caused by the possibility of a certain permanent

deformation at high temperatures.