Illustrate the vehicle tapered roller bearing failure reasons

Tapered roller bearing is one of the common types of bearing type, also common in vehicles, and tapered roller bearing in use process, failure is a common problem, in order to solve this problem, the bearing network ( Hereinafter referred to as:) To illustrate the specific reason for the bearing failure. Tapered roller bearing in the following example is in use process, appear early failure, remove the discovery after bearing assembly high anomaly, roller surface spalling, numerous flake debris after cleaning. After 1, tapered roller bearing failure, the characteristics of each part failure: 1. 1 tapered roller bearing outer ring outer ring raceway surface work for normal trajectory, there was a slight peeling, outer diameter surface of the relative sliding friction marks, as shown in figure 1. Figure 1 outer ring raceway picture 1. 2 bearing inner ring inner ring raceway surface has obvious wear and obvious effect of the RCC, and have black flake debris, large surface of the rim is normal, no damage; Inner surface of the relative sliding friction marks, 4/5 of the whole inner width, as shown in figure 2. Figure 2 inner ring raceway surface images and inner ring diameter picture 1. Three roller rolling body every grain all have different degrees of spalling, roller diameter roller ball base level is normal, as shown in figure 3. Figure 3 roller surface spalling picture 1. 4 cage cage in good condition, two thirds of the surface of the beam diameter friction marks, the corresponding edge beam inner surface along the direction of extrusion deformation, at the same time window small side has obvious roller indentation, as shown in figure 4. Figure 4 a beams and the friction and keep frame window picture 2, small end bearing failure analysis from the bearing failure surface state and the related parameters of the measurement data can be analyzed as follows: 2. 1 bearing inner ring raceway size changed a lot, at the same time, the inner diameter of the bearing inner ring size bigger; 2. 2 bearing inner ring raceway surface of the whole trajectory is an obvious boundary, the trajectory scratches and spalling is due to the lubricating oil mixed with hard foreign body, under the high speed rolling roller caused; 2. 3 inner surface of the inner width is 4/5 of the inner surface and traces of the mutual friction between a rotating shaft, bearing inner ring and shaft should be an interference fit, there should be no mutual rotation phenomenon in normal working conditions; Traces in the rotation, the bearing inner ring and produces mutual movement between shaft and bearing abnormal work; 2. 4 bearing cage two-thirds of the surface of the beam diameter friction marks, the corresponding edge beam inner surface along the direction of extrusion deformation, while keeping the small end of the frame window roller indentation, obviously can be thought of bearing roller suddenly stuck at work, and keep the frame under the action of inertial continue to roll, cause beam inner surface edge along the rotation direction of extrusion deformation, the beam diameter and outer ring raceway surface friction marks; 2. 5 roller diameter all have different degrees of spalling, obvious effect on a single grain roller bearing load is very large, so the roller surface spalling is very serious, as shown in figure 5. Figure 5 bearing load distribution area 3, conclusion according to the numerous flake debris after cleaning, and based on the objective analysis the damage on the surface of the bearing damage, can preliminary determination bearing is at work due to foreign bodies to enter, suddenly stuck, roller cage under the action of inertial continue to roll, squeezing roller cage, cage with outer face deformation and friction, the load increase, cause between shaft and bearing inner ring movement, leading to bearing rash move, causing abnormal transmission gear meshing position, make the bearing on the load produces rapid change, so that the roller bearing inner ring with abnormal contact wear and high-speed roller bearing inner ring raceway of RCC, cause the bearing inner ring raceway wear serious, leading to premature failure of the bearing. In short, in order to realize precision of rolling bearing has a longer life expectancy and retention period, in addition to bearing manufacturers strive to improve product quality, bearing the user requirements must also be in strict accordance with the use of the bearing bearing installation and maintenance, otherwise, it is a good bearing will damage in the rough random use conditions.