China Ningbo Bearings Manufacturer

How to install high speed ball bearing?

02.22.2012 in Blog by admin

With high-speed ball bearing installation and adjustment:

1 high-speed ball bearings with ball bearings and clearance because both high-speed high-precision ball bearing according to requirements, but also by high temperature ball bearing requirements, taking into account their co-ordination and clearance, to take into account the following two 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 of ball bearings to strive to maintain the accuracy and performance, it is difficult.

In order to ensure the installation of roller ball 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 ball bearing 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 ball bearing dmn value 3 million mark.

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 ball bearing 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 ball bearing dmn value 3 million mark.

In considering the high-speed ball bearing clearance, not only to consider the above factors, but also to consider the axis of elongation of the thermal clearance, and called ball bearings in working condition, that is the best operating temperature of clearance, and this clearance is included, the outer ring ball groove to precisely position the center of state formation. As high-speed ball 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 ball bearing clearance.

In considering the amount of interference with ball 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.

(2) the relevant parts of the requirements of the host

Where high-speed ball bearing ball bearing rotary system is required precision dynamic balancing, shaft and ball bearing seat hole installation site should be higher than the general requirements of dimensional accuracy and geometric accuracy, concentricity, and especially the shoulder of the bore or block journal of verticality, and in considering these questions, the same must be noted that the high-speed ball bearing running temperature factors and factors.

Shaft bearing systems require both high rigidity and light requirements of quality as much as possible, in order to overcome this contradiction can be taken such as reducing surface roughness and improve the surface hardening measures to improve the supporting rigidity, the use of hollow shaft to reduce the system quality.

Tags: Ball Bearing, high speed ball bearing