Lubrication and maintenance knowledge of high temperature and high speed INA slewing bearings

Bearings in the process of use due to their own quality and external conditions, their load capacity, rotation accuracy and wear resistance will change. When the performance index of the slewing bearing is lower than the use requirements and can not work properly, INA bearing has occurred If the fault even fails, the machine and equipment will stop and there will be various abnormal phenomena such as loss of function in case of failure of the bearing, etc. Therefore, it is necessary to find out the cause in a short period of time and take corresponding measures.
The high-temperature thickener thickens the synthetic oil and adds multi-effect additives, which is a high-quality grease that maintains normal working conditions in a high temperature environment for a long time.
A High temperature tolerance and high-speed shear resistance make it easy to handle in high temperature and high speed environments.
B Excellent high and low temperature resistance, lubricity, good colloidal stability and mechanical stability.
C The temperature range is -40~230°C and the short time is 250°C.
D is suitable for mechanical use where there is a requirement to reduce noise or the environment is extremely harsh, and it is also suitable for lubrication at high temperatures.
E Waterproof, resistant to water rinsing and maintaining hardness over a wide temperature range. Excellent anti-oxidation performance, good anti-wear performance, resulting in extremely long service life and 5-10 times the service life of lithium base grease.
F is suitable for lubrication of precision bearings, motor bearings and miniature bearings in high and low temperature environments.
G Suitable for lubrication of various high speed bearings, high speed long life gyro motors, high speed grinding machines and other high speed instruments and mechanical INA bearings.
H The structure is smooth, the fiber is fine, and it has high cleanliness. It can suppress the abnormal sound of the slewing bearing during operation and meet the long-term operation requirements of high-speed bearings with DN value above 500,000.
The vibration of the INA bearing has a significant effect on the failure of the bearing. For example, spalling, indentation, rust, cracks, wear, etc. are reflected in the bearing vibration detection, so by using a special bearing vibration measuring device (frequency analyzer and vibrometer) The magnitude of the vibration can be measured, and the specific situation of the abnormal vibration can be inferred by the frequency distribution. The measured value varies depending on the condition of the bearing or the position at which the sensor is mounted. Therefore, it is necessary to analyze the measured value of each machine in advance. Determine the criteria after comparison.
Usually, the temperature of the slewing bearing rises slowly with the start of operation, and reaches a steady state after 1 to 2 hours. The normal temperature of the INA bearing varies with the heat capacity, heat dissipation, speed and load of the machine. If lubrication or installation is not suitable, then The bearing temperature will rise sharply and abnormal temperature will occur. At this time, it is necessary to stop the machine and take necessary precautions.

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Effect of lubricating oil on the performance and life of INA universal joint bearings

INA bearing lubricants can be broadly divided into two categories: lithium-based and calcium-based. Vibration control systems can help solve problems. Based on the application technology of the LM Guide Ball Screw, the system protects people's lives and lives during an earthquake. The system not only prevents damage caused by earthquakes, but also has excellent water resistance, mechanical stability and chemical stability of lithium-based lubricating oil. Lithium soap has strong thickening ability, and extreme pressure is added to the grease. After adding additives such as agents and rust, a variety of long-life fats are prepared. It can also reduce people's panic because of their ubiquity, reliability and durability. Brick machine bearings use harsh environment, long time, heavy load and difficult maintenance. Therefore, most of them use lithium-based lubricants.
    If there are foreign objects such as iron filings, burrs, dust, etc. in the INA bearing, it will cause noise and vibration during the operation of the universal joint bearing, and even damage the raceway and rolling elements. Therefore, before installing the bearing, you must ensure that the mounting surface and the installation environment are clean.
    Lubrication has a very important influence on the operation and life of INA bearings. Grease is made from base oils, thickeners and additives. The performance of the grease is primarily determined by the base oil. Generally low viscosity base oil is suitable for low temperature and high speed; high viscosity is suitable for high temperature and high load.
    The thickener is also related to the lubricating properties, and the water resistance of the thickener determines the water resistance of the grease. In principle, the different greases of the brand cannot be mixed, and even the grease of the same thickener may have a bad influence on each other due to the different additives. The universal joint bearing surface is coated with anti-rust oil, which must be carefully cleaned with clean gasoline or kerosene, and then cleaned with high-quality or high-speed high-temperature grease for installation. Fully enclosed bearings do not need to be cleaned and refueled.
    After the INA bearing is installed, if it is not carefully aligned, alignment may result in additional loads, friction and vibration of the bearing. These can accelerate fatigue and reduce bearing life and can damage the life of other machine parts. In addition, increased vibration and friction can greatly increase energy consumption and risk of premature failure.
During use, the basic external conditions of the gimbal bearing operation are often monitored, such as temperature, vibration and noise measurements. These regular inspections will identify potential problems early and will prevent unexpected machine stops, enabling production plans, increased plant productivity and efficiency.
During operation, INA bearings require proper relubrication to perfect its performance. The method of bearing lubrication is divided into grease lubrication and oil lubrication. In order to make the bearing function well, first, choose a lubrication method that suits the conditions of use and the purpose of use. Lubricity of oil lubrication predominates if only lubrication is considered. However, grease lubrication has the advantage of simplifying the structure around the universal joint bearing.

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