1 with high-speed bearings and the bearing clearance is necessary because high-speed precision bearings according to requirements, but also by high-temperature bearings Sufferings in the requirements, so consider the co-ordination and clearance, to take into account the following points:
(1) when the temperature rose to high temperature changes in the size and hardness changes;
(2) high speed centrifugal force caused by the force system changes and shape changes.
In short, high-speed, high temperature conditions, with and clearance from the choice should strive to maintain the accuracy and performance bearing, this is difficult.
In order to ensure the installation of roller bearing deformation is small, the interference with the amount of interference can not be made too large, and high speed centrifugal force and high temperature thermal expansion, or offset with the surface normal pressure. Or so with the surface relaxation, the amount 1 with high-speed bearings and the bearing clearance is necessary because high-speed precision bearings according to requirements, but also by high-temperature bearings Sufferings in the requirements, so consider the co-ordination and clearance, to take into account the following points:
(1) when the temperature rose to high temperature changes in the size and hardness changes;
(2) high speed centrifugal force caused by the force system changes and shape changes.
In short, high-speed, high temperature conditions, with and clearance from the choice should strive to maintain the accuracy and performance bearing, this is difficult.
In order to ensure the installation of roller bearing deformation is small, the interference with the amount of interference can not be made ??too large, and high speed centrifugal force and high temperature thermal expansion, or offset with the surface normal pressure. Or so with the surface relaxation, the amount of interference must be considered under the premise of these two factors should be carefully calculated, at room temperature under constant speed and effective amount of interference for high-speed bearings may be invalid.
If the calculation results of this conflict is too large (usually only in the ultra-high speed only in this case), only to take part under the lubrication and hydrostatic lubrication and lubrication with a double measure, and this program has the potential to break the bearing dmn value 3 million mark.
In considering the high speed when the bearing clearance to consider not only the above factors, but also to consider the thermal elongation axis of the impact of clearance, bearing in working condition requires that the operating temperature has the best clearance, which kinds of clearance is included, the outer ring ball groove precise alignment of the state center formed. As high-speed bearings for lower internal friction and relative sliding, best not to use the inner and outer rings relative axial dislocation along the way to adjust the ball bearing clearance. In considering the amount of interference with the bearings and clearance, to note that the material at high temperatures becomes soft and easily deformed features, and many times at room temperature to high temperature by the temperature change caused by the possibility of some permanent deformation’s of interference must be considered under the premise of these two factors should be carefully calculated, at room temperature under constant speed and effective amount of interference for high-speed bearings may be invalid.
If the calculation results of this conflict is too large (usually only in the ultra-high speed only in this case), only to take part under the lubrication and hydrostatic lubrication and lubrication with a double measure, and this program has the potential to break the bearing dmn value 3 million mark.
In considering the high speed when the bearing clearance to consider not only the above factors, but also to consider the thermal elongation axis of the impact of clearance, bearing in working condition requires that the operating temperature has the best clearance, which kinds of clearance is included, the outer ring ball groove precise alignment of the state center formed. As high-speed bearings for lower internal friction and relative sliding, best not to use the inner and outer rings relative axial dislocation along the way to adjust the ball bearing clearance. In considering the amount of interference with the bearings and clearance, to note that the material at high temperatures becomes soft and easily deformed features, and many times at room temperature to high temperature by the temperature change caused by the possibility of some permanent deformation.



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