Home>Bearing knowledge> INA needle roller bearing installation process " Matters focus on large inventory"

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INA needle roller bearing installation process "things focus on large inventory"

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The clearance of the bearing refers to the maximum flow of the other ferrule in the radial or axial direction; therefore, the clearance of the bearing is divided into radial clearance and axial clearance. When the moving needle roller bearing is installed; the clearance can not be too much. The ridiculousness of the needle. The clearance is too. The gongs and drums are bright, the 攘吭黾 攘吭黾 患 患 患 患 苁 苁 苁 INA bearing life reduction, clearance Too large; the number of moving bodies that will receive the load is reduced; the load of the single moving body is increased; then the rotation accuracy of the bearing is lowered; the service life is reduced; thus; the bearing related personnel must strictly control and adjust the clearance during installation. .
The reason why the bearing temperature is too high is: the bearing race is changed on the shaft or in the shell, the quality of the lubricating oil does not meet the demand or the change; the viscosity of the lubricating oil is too high, the load is too large, the INA bearing adheres to the frame or the rolling body is broken, and the structure is installed. Too tight (lack of clearance), bearing installation is too tight, etc.
.1), needle roller bearings work under high-speed conditions; and the operating temperature is high; should pay special attention to the cooperation of the rotating ferrule can not be too loose; to avoid the appearance of painful oscillation; and the cooperation of the fixed ferrule can not present a gap; Avoid ferrule deformation under load and stimulate oscillation.
.2), it is necessary to accurately calculate the interference of the rotating ferrule cooperation; it is also necessary to accurately calculate the appropriate cooperation amount of the fixed ferrule. The rotation lap of the rotating ferrule should also be smaller within the possible range. The effect of thermal expansion at the operating temperature; and the effect of centrifugal force at the highest rotational speed; does not create the activity or sliding of the tight cooperating surface. The fixed ferrule depends on the operating load size and bearing scale; chooses a small gap cooperation or interference cooperation; Or too tight is not conducive to sticking to the exact shape.
.3), the roundness of the shaft and the seat hole and the straightness of the shoulder should be required according to the corresponding precision of the bearing.
The rolling bearing promises a subtle work noise during the operation; if the sound is too loud or there is abnormal noise or impact sound, it indicates that the bearing is faulty.
The pre-tightening of the bearing is when the bearing is installed; an axial force is applied to the inner ring or the outer ring; to eliminate the clearance of the needle bearing; and the initial deformation of the moving body and the inner and outer rings are touched. Stiffness and rotation accuracy under working conditions; bearings with large receiving loads; high requirements for rotational accuracy; mostly operating without clearance or even a small amount of interference; in this case, INA is required during installation The bearing is pre-tightened. The adjustment and pre-tightening of the clearance are generally completed by the appropriate axial relative displacement of the inner ring to the outer ring.

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