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Principle of self aligning ball bearing and principle of load preload
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Compared with plain bearings, self aligning ball bearing has obvious advantages not only in material, but also in principle and technology, and the accuracy control is much more strict than that of common bearings. In the working process, stainless steel bearings are stable, small noise, corrosion resistant, and widely used. The Yiyang Longma Bearing Co., small to give details about its principle.
The principle of self aligning ball bearing
Self aligning ball bearing is mainly subjected to radial load, and can also bear radial load and axial load at the same time. When it only bears the radial load, the contact angle is zero. When self aligning ball bearing has large radial clearance, it has the performance of angular contact bearing and can bear large axial load. The friction coefficient of self aligning ball bearing is very small, and the limit speed is very high. Especially under the condition of high axial load, self aligning ball bearing is superior to thrust ball bearing.
Self aligning ball bearing construction
Self aligning ball bearing has simple structure. It is easy to achieve high manufacturing accuracy compared with other types, so it is convenient for mass production and low manufacturing cost, and is widely used. Self aligning ball bearing in addition to the basic type, there are a variety of variant structure, such as: self aligning ball with dustproof cover bearing, with a rubber sealing ring self aligning ball bearing, a self aligning ball stop groove bearing, ball filling gap is big load capacity of the self aligning ball bearing self aligning ball bearing, double row.
Self aligning ball bearing type
Single column self aligning ball bearing
Single column self aligning ball bearing with dust cover
Single column self aligning ball bearing with dustproof cover and seal ring
Single column self aligning ball bearing with stop grooves and stop rings on the outer ring
Single column self aligning ball bearing
Single column self aligning ball bearing with dust cover
Single column self aligning ball bearing with a seal ring
Single column self aligning ball bearing with stop grooves and stop rings on the outer ring
Due to the existence of clearance, self aligning ball bearing will move relative to the inner and outer circles under load. This 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 affected. In order to reduce the vibration, for high precision and high speed mechanical equipment, technical personnel in Yiyang Longma bearing often adopts the method of pre tightening in the installation of self aligning ball bearing, which is installed in a given load bearing (radial or axial), eliminating the original clearance and the bearing body
1. The purpose of Preloading
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 load preload
The size of the preload is usually determined by the size of the working load, the rotation accuracy of the spindle and the speed of the rotation.
1. The spindle load is small, the precision of rotation is high and the speed is low, so the load should be preloaded.
2, the work load is big, the speed is high, because it is easy to heat and expand, it is appropriate to take the smaller pre load.
The heat lamp 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. For the central part of the center which is tightly coordinated, or has been locked in the one axis, there is no way to remove the bearing puller with the machine. The inner ring of the bearing can be heated to aggravate the relocation. If once a torch, it will change the function of the bearing steel and the bearing must be abandoned.
Any self aligning ball bearing is using his largely originated for the protection and maintenance it absorbed. Self aligning ball bearing has a special corrosion resistant coating bearing for selection, but a small number of bearings have no corrosion proof material. Bearing results can lead to noble downtime, facility protection and trouble. This includes bearing storage, clear, cleaned up, and test device. The idea of all anti conflict bearings.
The bearings are not here to be subjected to high humidity, or a sudden and violent change of measurement, which can lead to a sea of condensation. No bearing type tube, bearing should especially accidentally cut off. There is no indirect storage on the lime ground, where water collection and bearing can be condensed.
In order to reach the function of the high facility and the minimum protection profit, it is necessary to comply with the exact solution. The bearings that are being solved and stored must be careless to ensure that they are not rusty or eroded.
The construction and reform of self aligning ball bearing has the shielding insulation layer delivery. Generally, it is covering the paper or the rest of the package for a time, and is being transported in the once trunk 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 is the main body once secondary light industrial facilities.
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