Co-ordination of the installation of high-speed bearings and Adjustment

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A high-speed bearings with clearance due to the high-speed bearings only in accordance with high-precision bearing requirements, but also at high temperature bearing requirements, therefore in con sidering the coordination and clearance, to take into account the following two points:

(1) rose from room temperature to high temperature when the size change and hardness change;

(2) high speed centrifugal force caused by the force system change and shape change.

In short, high-speed, high temperature conditions, from the choice of co-ordination and clearance to strive to maintain the accuracy and performance bearing, this is difficult.

In order to ensure that the bearings installed raceway deformation is small, the interference fit amount of interference can not be made too large, high-speed centrifugal force and high temperature thermal expansion or offset with the surface of the pressure. With the surface relaxation, the amount of interference must be calculated carefully consider these two factors, the effective amount of interference in the normal temperature and speed may not be valid for high-speed bearings.

If the calculation results of this contradiction is too large (usually only in this case) only in the ultra-high-speed, only to take the ring lubrication and hydrostatic lubrication and dual lubrication measures, and this program may cause bearing dmn value of breakthrough 3 million mark.china ball bearing

High temperatures of thermal expansion, or offset with the surface of the normal pressure. With the surface relaxation, the amount of interference must be calculated carefully consider these two factors, the effective amount of interference in the normal temperature and speed may not be valid for high-speed bearings.

If the calculation results of this contradiction is too large (usually only in this case) only in the ultra-high-speed, only to take the ring lubrication and hydrostatic lubrication and dual lubrication measures, and this program may cause bearing dmn value of breakthrough 3 million mark.

Not only to consider the above factors when considering high-speed bearing clearance, but also to consider the thermal elongation of the axis of clearance required bearing in working condition, that have the best clearance in the working temperature, which kinds of clearance, including the outer ring ball groove center precise bits of state formation. Seeks to reduce the relative sliding and internal friction due to high-speed bearings, it is best not to use the clearance will be within the outer ring along the axial relative displacement method to adjust the ball bearings.

Consider the bearing with the amount of interference and clearance should be noted that the material under high temperature to become soft and easily deformed, and the temperature change caused some permanent deformation of the possibility of several times from room temperature to high temperature.ball bearing manufacturer

2 requirements of the relevant parts of the host

High-speed bearing requirements bearings where the rotation system, precision balancing, install the bearing parts of shaft and housing bore should be higher than the general requirements for dimensional accuracy and the shape and position accuracy, concentricity and shoulder block bore or journal verticality, and the time to consider these issues, the same must be noted that the high-speed bearing operation factors and high temperature factors.

Shaft bearing systems require both high rigidity, and quality requirements as light as possible, to overcome this contradiction can be taken such as to reduce the surface roughness and surface hardening measures to improve the bearing stiffness, the hollow shaft to reduce the quality of the system.ball bearing supplier