What are the basic conditions to be fulfilled are normal operation of high-speed bearing
by:Waxing2020-11-13
For some high speed movement of the equipment, the need to match with corresponding high-speed bearing.
In order to ensure the normal running of equipment, the high-speed bearing in rotary system should be based on the precise dynamic balance test, at the same time shaft and hole bearing installation of the parts shall be higher than the general requirements of dimensional accuracy, form and position accuracy.
Especially considering the coaxial degree of hole or shaft neck and shoulder verticality.
In addition to the above requirements, also need to consider to the high-speed bearing in the process of operation, need to bear the high speed and high temperature factors.
This is because the high-speed bearing should not only meet the need of high precision requirements, at the same time also need to ensure that its heat resistance performance standards.
In considering the high-speed bearing installation coordination and clearance need to grasp the following two points: one, when high-speed bearing from room temperature rise to a high temperature state, after the change of the size and the hardness change shall be within the scope of the permit;
Another requirement is that under the high speed centrifugal force caused by the force system and shape changes within the scope of the permit.
Second, considering the characteristics of high speed, so the bearings after installation, the roll deformation must be as small as possible, amount of interference and the interference fit to achieve is not too large.
In the process of high speed running, it will be at the same time by the centrifugal force and high temperature conditions must be under the influence of thermal expansion, or on the surface of the offset with the normal pressure.
So, under the normal temperature constant velocity, the effective amount of interference for high-speed bearing may be invalid.
At the same time also need to consider to ensure these requirements at the same time, bearing the characteristics of material itself under the condition of high temperature.
All in all, under the condition of high speed, high temperature, from the choice of coordination and clearance to strive to maintain the accuracy and working performance of the bearing is has the certain difficulty.