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Pre load fault method for spherical roller bearing
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| Time：2017.11.21 News Sources：Shandong Xinkaite bearing Co.,Ltd. Views：
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Because of the clearance of spherical roller bearings, the inner and outer rings will move relative to each other under the action of load, which will reduce the stiffness of the bearing, cause the radial and axial vibration of the shaft, and make the working accuracy and life of the machine be affected. In order to reduce the vibration, for high precision and high speed mechanical equipment, technical personnel often use the method of pre tightening in the installation of spherical roller bearings, which is installed in a given load bearing (radial or axial), eliminating the original clearance and the bearing body and the outer ring can generate elastic deformation, thus preventing work when the relative shift between the inner and outer rings.
First, the purpose of pre load
The spindle bearing preload, the ball and raceway to eliminate the original clearance and the formation of a certain elastic deformation when subjected to external loads, the bearing has a certain rigidity, bearing for load stress in the opposite direction with the outside installation, not because of external load and make the ball and raceway gap, thus to improve the rotation accuracy of the spindle, the spindle stiffness to strengthen and improve the service life, but also can reduce the noise.
Two, the principle of pre load
The magnitude of preload is generally determined by the magnitude of the load, the spindle rotation accuracy and the speed of the spindle.
1, the spindle load is small, high rotation accuracy and low speed, it is advisable to pre load larger.
2, because of the high working load and high speed, it is advisable to take smaller preload when it is easy to generate heat and expand.
Hot lights or other heating facilities can be used. Even without gloves or wet chemical contact of the hand cover shelter can lead to large or small seal is once waters, this can cause the bearing fatigue. With respect to the center of the bearing which is closely attached or locked, or has been locked in the axis, the bearing puller cannot be removed by the machine, and the inner ring of the bearing can be heated so as to aggravate the relocation. If the torch is used once, it will change the function of the bearing steel and the bearing must be discarded.
Any spherical roller bearings are largely using his origin for the protection and maintenance it absorbed. Spherical roller bearings are equipped with special anti erosion coating bearings for choice, but most of the bearings do not have anti erosion data to build. Bearing performance can lead to noble downtime, facility protection and defects. This includes bearing storage, clear, cleaned up, and test device. The idea of anti collision bearing applied in all cases.
Bearings here are not subject to high humidity or abrupt and violent changes, which can lead to condensation of the sea. No bearing type tube, bearing should not be cut off accidentally especially indirect storage is lime, is there to condensed water collecting and bearing.
Accurate solutions must be followed in order to achieve the high functioning of facilities and the minimum protection profits. Bearings that are being solved and stored must be careless to make sure they dont rust or corrode.
The formation and reform of spherical roller bearings have protective insulation delivery, usually covering cover paper or other packaging at one time, and it is shipped in one case or wooden box. Always take the bamboo or Xu, if not, is the roller and the tapered roller bearing cup plastic cloth. The store shelf tray or bearing spherical roller bearing is mainly composed of a secondary body once light industrial facilities.
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