NTN Bearing the proper maintenance and timely maintenance is to ensure the normal operation of an important aspect of road machinery. Bearing maintenance, maintenance of good can work thousands of disappeared or even longer; the contrary, will make the service life of bearing a significant decline, there may even be bush-burning, axle and other serious accidents. Usually one-way bearing lubricants operating temperature shall not exceed 50 ° C in order to ensure adequate lubricant, lubrication, reliable, timely or regularly check the oil level, oil to keep it within the limits prescribed. To keep some clean oil quality requirements, timely replacement. Bearing failure a case-by-case analysis, and immediately removed. Bearing failure and treatment is as follows.
(1) bearing heating. NTN Bearing lubricants should refuel and check the oil is smooth; If the oil has impurities, cleaning bearings, replaced with new oil, clean the filter; if the assembly is bad, the journal and bearing skew, partial load, can be In the bottom of the bearing and gasket; bearing clearance is too small, should be re-adjust the gap.
(2) axis fever. Shaft gear oil or rubber ring is too tight and should be adjusted to fill the back cover position; if the radial shaft and the bearing cap friction, you should check and adjust the axis radial clearance with the bearing cap, usually 0.25 ~~ 0.3mm.
(3) the friction surface of the oil is less. If the pipeline is blocked, oil groove is shallow, washing lines, deepening the oil groove; if the oil temperature is low, poor mobility, should be the ambient temperature replacement of oil; oil ring rotation is slow, poor splash, you should check the oil ring is off. grazing, high oil can be put oil to the standard height; adjusting pads block the lubricant, should examine and adjust the gasket position.
(4) oil spill. If the multi-fuel, fuel supply should be adjusted to maintain the standard height of the oil surface; if the sealing device failure, compression gland, and thickening of the circle of felt or replacement of the sealing materials; NTN Bearing holes, permeability, should replace the bearing Block, or the ways to fill lead to blocked pores.
(5) axial runout. If the bearing clearance is too large, you should withdraw the gasket, adjust; if the rotating body (gears, belt wheel, etc.) balancing bad, should be checked and adjusted the dynamic balance; if the bearing is unstable, should tighten the bearing seat bolts; if associated shaft to install the offset is greater than in the ground bearing pads, adjust the coupling installation accuracy.
NTN Bearing fracture failure mainly due to defects and overload the two major factors. When the applied load exceeds the strength of the material limits of the part fracture is called overload fracture. Overload is mainly due to a host of unexpected failure or improper installation. One-way bearing parts of the micro-cracks, shrinkage, bubble, large pieces of foreign debris, overheating organizations and local burns and other defects in the impact of the upload or vigorous vibration also caused the defect at the fracture, called the defect fracture. It should be noted that the bearings in the manufacturing process, raw materials into the plant reinspection, forging and heat treatment, quality control, process control instrument to correctly analyze the above-mentioned defects, must be strengthened in the future control. But in general, usually bearing fracture failure of most of overload failure.
NTN Bearing at work, due to the influence of external or internal factors, so that the original with the gap changes, the accuracy decreased, and even cause "killed" as the failure of changes in the clearance. External factors such as interference is too large, installed in place, the temperature rise caused by the expansion of the amount of transient overload, internal factors, such as retained austenite and residual stress in the unstable state and so is the main reason for the changes in the clearance failure.
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