Full Complement Cylindrical Roller Bearing Design: Full complement cylindrical roller bearings are suitable for bearing extremely heavy radial loads because they have no cage and can accommodate rollers. However, its allowable running speed is much lower than that of cylindrical roller bearings with cages. The standard supply range of Shanghai Xuanyu Double Row Full Complement Cylindrical Roller Bearings includes four designs: three open designs and one sealed design. All bearings are of non-separable design, with lubrication grooves and three lubrication holes in the outer ring for easy lubrication. Full Complement Cylindrical Roller Bearings Small Loads: In order for the bearings to run well, double row full complement cylindrical roller bearings, like all ball and roller bearings, must withstand a certain small load, especially at high speeds or high accelerations. Or work under rapid changes in load direction. Under these conditions, the inertial forces of the rollers and cages and the friction within the lubricant will adversely affect the rolling of the bearing, possibly producing bearing-damaging sliding motion between the rollers and raceways. In general, with the correct use of cylindrical roller bearings, fatigue life can be achieved. But in the event of accidental early damage, it can no longer be used. Unlike fatigue life, this early damage, called failure or accident, is often caused by poor consideration of installation, use, and lubrication, foreign matter intruding from the outside, or insufficient research on shafts and bearing housings. However, it is difficult to know the real cause of the damage only by investigating the damage of the cylindrical roller bearing. Therefore, on the basis of fully understanding the machine, working conditions and peripheral structure of the cylindrical roller bearing, if the situation before and after the failure occurs, and then analyze the damage of the bearing and various related reasons, it is possible to prevent similar glitch again. To this end, we can analyze the damage of cylindrical roller bearings from the following points: 1. Mechanical damage In general, the mechanical damage of cylindrical roller bearings refers to the appearance of groove marks at different levels on the alloy surface of the bearing bush. In severe cases, metal peeling and large-scale messy scratches occur on the contact surface. The main reason for the mechanical damage of the bearing due to the coexistence of contact surface damage and ablation is that it is difficult to form an oil film on the surface of the cylindrical roller bearing or the oil film is severely damaged. 2. Plastic deformation and cold work hardening occur in the cavitation surface of the bearing. Under the repeated action of the cylinder pressure and impact load, the cylindrical roller bearing will locally lose its deformation ability, gradually form lines and continue to expand, and then as the wear debris falls off, it is affected. The outer layer of the carrier forms a cavity. Generally, when the bearing bush is cavitated, the pit first appears, and then the pit gradually expands and causes the cracking of the alloy layer interface. The crack expands along the parallel direction of the interface until it peels off. The main reason for the cavitation of sliding bearings is that the oil flow is strongly turbulent due to the sudden change of the cross section of structural elements such as oil grooves and oil holes. Cavitation generally occurs in high load areas of the bearing, such as the lower bearing pad of the crankshaft main bearing. 3. Fatigue pitting of cylindrical roller bearings Fatigue pitting refers to the overheating of the cylindrical roller bearing and the excessive bearing clearance due to the overloading of the engine, resulting in fatigue damage, fatigue pitting or fatigue shedding in the middle of the bearing. Most of this damage is caused by overloading, excessive bearing clearance, or dirty lubricating oil and foreign matter mixed in it. Therefore, care should be taken to prevent the cylindrical roller bearing from overloading during use and do not run at a too low or too high speed; adjust the engine to a stable state when idling; ensure normal bearing clearance to prevent the engine from being too high or too low; check , Adjust the working conditions of the cooling system to ensure that the working temperature of the engine is appropriate. 4. Corrosion of bearing alloys Corrosion of bearing alloys is generally caused by impure lubricating oil. Chemical impurities (such as acid oxides, etc.) contained in the lubricating oil may oxidize the bearing alloy to generate acid substances, which will cause the bearing alloy to partially fall off and form irregular tiny cracks or small pits. The main reasons for the corrosion of bearing alloys are improper selection of lubricating oil, poor corrosion resistance of selected cylindrical roller bearings, or improper operation of the engine, excessive temperature and so on. 5. In the case of lack of bearing melting lubrication and poor cooling, local high temperature will be formed, and there will be direct contact with tiny raised metal surfaces between the journal and the bearing friction pair, so that the bearing alloy will be blackened or partially melted. This fault is often caused by the tight fit between the journal and the bearing; the lack of lubricating oil pressure can also easily cause the bearing to burn out. The damage status of cylindrical roller bearings, such as scratches on the rib of the roller bearing, may be caused by insufficient lubricant, inappropriate grade, defective oil supply and discharge structure, foreign matter intrusion, bearing installation error or deflection of the shaft If it is too large, it may also be caused by a combination of the above reasons.
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