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Inspection and Treatment Methods for Overheating of Double Direction Thrust Ball Bearing


The temperature of the double direction thrust ball bearing can generally be inferred from the temperature outside the bearing chamber. It is more appropriate to use the oil hole to directly measure the temperature of the outer ring of the bearing. Usually, the temperature of the double direction thrust ball bearing starts to rise slowly as the bearing runs, and reaches a steady state after 1-2 hours. The normal temperature of the bearing varies with the heat capacity, heat dissipation, speed and load of the machine. If the lubrication and installation are not suitable, the bearing temperature will rise sharply and abnormally high temperature will occur. At this time, the operation must be stopped and necessary preventive measures should be taken.


The use of thermal sensors can monitor the working temperature of the double direction thrust bearing at any time, and realize automatic alarm or stop when the temperature exceeds the specified value to prevent the occurrence of burning shaft accidents.


1. High temperature often indicates that the double direction thrust ball bearing is in an abnormal condition


High temperatures are also detrimental to bearing lubricants. Sometimes bearing overheating can be attributed to the lubricant of the bearing. If the double direction thrust ball bearing is continuously rotated for a long time at a temperature exceeding 125 °C, the bearing life will be reduced. Causes of high temperature bearings include: insufficient or excessive lubrication, lubricants. Contains impurities, excessive load, bearing damage, insufficient clearance, and high friction caused by oil seals, etc.


The operating temperature of the double direction thrust bearing depends on the heat treatment process of the bearing. The tempering temperature of the conventional heat treatment process is 150 °C, and the operating temperature of the bearing is generally required to be within the range of 120 °C. If there are special requirements for use, you can use 200 °C, Tempering temperature of 250°C or higher, at this time, the use temperature can reach 170°C, 230°C or higher.


2. It is necessary to check the running state of the double direction thrust ball bearing machine


Double direction thrust bearings are the focus of attention, and it has become increasingly important to prepare a thorough inspection program. Because it is the most important condition monitoring of all rotating machinery components, it is an important part of the home to prevent bearing damage to prevent early detection of bearing damage during equipment downtime for unplanned maintenance. But not all machines are equipped with this advanced equipment. In this case, the machine operator or service engineer must signal a bearing failure.


During the operation of the double direction thrust bearing, sometimes hard foreign particles or hard foreign objects or wear debris on the metal surface will be squeezed between the bearing surfaces, which will cause furrow-shaped abrasions on the bearing, and these hard foreign objects will enter through the lubricating medium. Inside the bearing, with the continuous operation of the bearing, local friction heat is generated, which is easy to cause local deformation of the friction surface and friction micro-welding phenomenon, and even local melting may occur, and finally cause the occlusion phenomenon.


The reasons for bearing fracture are two major factors: defect and overload. When the applied load exceeds the material strength limit and the part is fractured, it is called overload fracture. During the operation of the two-way thrust bearing, defects such as overheated tissue and local burns will also occur, resulting in defect fracture. Generally, we can use the instrument to check which kind of fracture it belongs to. In most cases, the failure of bearing fracture is mostly caused by overload.