The harsh working conditions in nature can lead to bearing failure, but the chances of proper functioning of the bearings can be improved by following simpler rules of an agricultural machine adapter bush. In the process of using bearings, excessive neglect will lead to bearing overheating, may also make the bearings can not be used again, or even completely destroyed. But a damaged bearing leaves behind the clues as to why it is damaged. Through some careful reconnaissance work, we can take action to avoid bearing failure again.

Lead to bearing failure for many reasons, but the common is incorrect use, pollution, lubricant FB090 bronze rolling bushings improper use, handling or handling of the damage and installation errors. The reason for the failure of the diagnosis is not difficult, because of the evidence left behind by the bearings to determine the cause of the bearing failure.

However, after the investigation and analysis to provide valuable information, it is best to first completely through the correct selection of bearings to prevent the sleeve sliding bearing effect. In order to do this, it is important to look at the manufacturer's dimensional guidelines and the characteristics of the selected bearings.

How to extend bearing life

    1. Bearing failure reasons
    Approximately 40% of failures in ball bearings are caused by dirt, dirt, debris contamination and corrosion. Pollution is usually caused by incorrect use and poor environment for use, and it can cause torque and noise problems. Bearing failure caused by the environment and pollution can be prevented, and simple visual inspection can determine the cause of such failure.
    After the failure of the analysis can learn about the failure or failure of the bearing should be viewed in what areas. Understanding the mechanisms of failure, such as erosion and fatigue, helps to eliminate the root causes of problems.
    As long as the use and installation is reasonable, the bearing erosion is easy to avoid. Ablation is characterized by the presence of indentations in the bearing ring raceway caused by impact loads or incorrect installation. Denudation usually occurs when the load exceeds the yield limit of the material. Corrosion can also occur if a load is applied across the bearing ring if it is installed incorrectly. Pits on the bearing ring also generate noise, vibration and additional torque.
    A similar defect is the oval indentation that occurs when the bearing is not rotating and the ball vibrates between the bearing rings. This damage is called low load erosion. This destruction occurs both in transit equipment and in equipment that is still vibrating when not in operation. In addition, debris generated by low-load erosion acts like an umbilical and further damages the bearing. Unlike erosion, low-load erosion is typically characterized by light-corrosive loss of light redness in the lubricant due to micro-vibration.
    Fatigue damage to premature material is caused by excessive preload after heavy load. If these conditions are unavoidable, bearing life should be carefully calculated to develop a maintenance plan.
    How to extend bearing life
    Another solution is to change the material. If the standard bearing material can not guarantee a sufficient bearing life, it should be used special materials. In addition, if this problem is due to excessive load, it should be used bearing capacity of Shi Qiang or other structures.
    Peristalsis is not as common as premature fatigue. Bearing creep is caused by excessive clearance between the shaft and the inner ring. Peristaltic great harm, it not only damage the bearings, but also damage other parts.
    The obvious feature of peristalsis scratches, scratches or changes in the color of the shaft and inner ring. In order to prevent peristalsis, you should first check with the naked eye bearing housing and shaft parts.
    Peristaltic and installation is not correct. If the bearing ring is not right or cocked, the ball will track along a non-circular orbit. This problem is due to the installation of incorrect or incorrect tolerance or incorrect installation of the bearing on the site. If the deflection exceeds 0.25, the bearing will fail prematurely.
    Checking lubricant contamination is much more difficult than checking for incorrect assembly or creeping. Pollution is characterized by early bearing umbilical cord loss. The solid impurities in the lubricant are the same as abrasive particles. Poor lubrication between the ball and cage can also wear and weaken the cage. In this case, lubrication is of crucial importance to a fully machined cage. In contrast, ribbon or crown cages can more easily reach all surfaces of the lubricant.
    2. Avoid bearing failure method
    The best way to solve the bearing failure problem is to avoid the failure. This can be achieved by considering the key performance characteristics during the selection process. These features include noise, starting and running torque, rigid, non-repetitive pendulums, and radial and axial clearances.
    Torque requirements are the highest for mountain lubricants, cages, bearing rings (roundness and surface finish of curved sections), and whether seals or shields are used. The viscosity of the lubricant must be carefully chosen because unsuitable lubricants can generate excessive torque, especially in small bearings. In addition, different lubricants have different noise characteristics. For example, greases generate more noise than lubricants. Therefore, according to different uses to choose lubricant.
    During the bearing rotation, if there is a random eccentricity between the inner and outer rings, a non-repetitive pendulum (NRR) will be produced that closely resembles the cam motion.Case dimension tolerances and bearing rings and balls Of the eccentric will cause NRR. And repetitive vibration is different, NRR is no way to compensate.
    In the industry generally according to the specific application to select different types and levels of precision bearings. For example, non-repetitive pendulums of bearings can not exceed 0.3 microns when minimum vibration is required. Similarly, the machine spindle can only allow the smallest vibration to ensure cutting accuracy. Therefore, in the application of machine tools should use non-repetitive smaller swing bearing vibration.
    In many industrial products, pollution is inevitable, so seals or shields are commonly used to protect the bearings from dust and dirt. However, due to the bearing inner and outer ring movement, the bearing seal can not be perfect, so the lubricant leakage and pollution is always an unsolved problem.
    Once the bearing is polluted, the lubricant will deteriorate and the running noise will increase. If the bearing overheats, it will get stuck. When the contaminant is between the ball and the bearing ring, the effect is the same as that between the metal surfaces, which can cause the bearing to lose value. Sealing and shielding devices to block dirt is a way to control pollution.