Analysis of the Influence of TIMKEN Micro-bearing Lubrication Method on Performance

When testing the advantages of chrome steel and stainless steel as TIMKEN bearing materials, they were found to not only have rust preventive effects. Chrome steel is the most common miniature bearing material. It is harder than stainless steel, so it lasts longer. However, at higher temperatures, its performance is not good.

At a high temperature of 120C, it undergoes tremendous deformation and the load is reduced. It can withstand a high temperature of 150C, but an instantaneous temperature of 150C or higher will reduce the life of the imported bearings. The heat treatment can subject the bearing to an elevated temperature of 170C.

The purpose of lubrication of TIMKEN bearings is to reduce internal friction and wear of the bearings, to prevent sticking, and the lubricating effect is as follows.

(1). Reduce friction and wear.

In the mutual contact portion of the ferrule, the rolling element and the retainer constituting the micro bearing, metal contact is prevented, and friction and wear are reduced.

(2). Extend fatigue life.

The rolling fatigue life of the bearing is prolonged when the rolling contact surface is well lubricated during rotation. Conversely, if the oil viscosity is low and the thickness of the lubricating oil film is not good, it is shortened.

(3). Discharge friction heat, cooling

The circulation oil supply method or the like can be used to discharge heat generated by friction or heat from the outside to cool. Prevent the bearing from overheating and prevent the lubricant from aging itself.

(4). Other

There is also the effect of preventing foreign matter from entering the inside of the bearing or preventing rust and corrosion.

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INA spherical roller bearing lubrication is good or bad for working conditions

As one of the imported bearings, INA bearings, in the normal operation process, how to properly lubricate the bearings, bearing maintenance and maintenance is an important part that can not be ignored.

Smooth oil bath is the most common smooth way in bearings, suitable for the smoothness of low and medium speed bearings. A part of the bearing is immersed in the groove, the smooth oil is brought up by the rotating spherical roller bearing part, and then flows back to the oil groove oil surface should be slightly lower than the center of the lowest rolling element.

The drip smoothness is suitable for the bearing parts that need to be quantitatively supplied with smooth oil. The amount of oil dripping is preferably every 3-8 seconds, and excessive oil quantity will cause the bearing temperature to increase.

The oil is pumped to the INA bearing component by an oil pump, filtered and cooled by the smooth oil after the bearing. Because the circulating oil can take away a certain amount of heat and cool the bearing, this method is used for the spherical roller bearing parts with higher rotation speed.

The use of boring shrinking air is mixed with smooth oil through a sprayer to create an oil mist. In the radial bearing, the air flow can effectively cool the bearing and prevent the intrusion of impurities. This method is suitable for the smoothness of high speed and low temperature bearing components.

The low pressure oil is injected into the bearing through the nozzle by the oil pump, and the oil injected into the bearing flows into the oil groove through the other end of the bearing. When the bearing rotates at high speed, the rolling element and the cage also cause airflow around the surrounding air at a relatively high rotational speed. It is difficult to send the smooth oil to the bearing in a smooth manner. In this case, it is necessary to spray the smooth oil with low-pressure radiation. In the bearing, the position of the nozzle should be placed between the inner ring and the center of the cage.

1) Compared with roller bearings, ball bearings have higher limit speeds, so ball bearings should be preferred when moving at high speeds.

2) Under the condition of the same inner diameter, the smaller the outer diameter, the smaller the rolling element, and the smaller the centrifugal inertia force of the rolling element on the outer ring raceway during running, the more suitable for higher speed. Work under. When placed at high speed, it is advisable to use ultra-light, extra-light and light series bearings. Spherical roller bearings for heavy and extra heavy series are only used for low speed and heavy load applications. If a light series INA bearing is used and the bearing capacity is not up to standard, a wide series of bearings can be considered, or two light series bearings can be used together.

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Master the key technologies for common maintenance of FAG flange bearings

Under normal conditions, flanged bearings will naturally rise in temperature after lubrication or relubrication and last for one to two days. Stiffness and performance vibration of flange bearings are sensitive to damage of FAG bearings. For example, peeling, indentation, rust, cracks, wear, etc. are reflected in the vibration measurement. Therefore, by using a special flange bearing flange vibration measuring device (Frequency analyzer, etc.) can measure the magnitude of the vibration, and the specific situation of the abnormality cannot be inferred by the frequency division. The measured values ​​differ depending on the conditions of use or the location where the sensor is mounted. Therefore, it is necessary to analyze and compare the measured values ​​of each machine in advance to determine the judgment standard.

The temperature of the flange bearing is generally estimated by the temperature of the outdoor surface. If the oil hole can directly measure the temperature of the outer ring of the flange bearing, it is more suitable.

Usually, the temperature rises slowly as the flange bearing starts to run, and reaches a steady state after 1-2 hours. The normal temperature of the flange bearing varies with the heat capacity, heat dissipation, speed and load of the machine. If the lubrication and installation parts are suitable, the FAG bearing temperature will rise sharply and abnormal temperature will occur. At this time, it is necessary to stop the operation and take necessary precautions.

The thermal sensor can be used to monitor the working temperature of the bearing at any time, and to automatically alarm or stop when the temperature exceeds the specified value, the high temperature is often indicated to indicate that the bearing is in an abnormal condition. High temperatures are also harmful to FAG bearing lubricants. Sometimes bearing overheating can be attributed to the lubricant of the bearing. Long-term continuous rotation of the bearing at temperatures above 125 °C will reduce bearing life. Causes of high temperature Qingdao flange bearings include: insufficient lubrication or excessive lubrication, lubricants. Contains impurities, excessive load, flange bearing damage, insufficient clearance, and high friction caused by oil seals.

The periodic measurement of the flange bearing temperature can be performed by means of a thermometer, such as a digital thermometer, which can accurately measure the FAG bearing temperature and display it in °C or Fahrenheit. The importance of the bearing means that when it is damaged, it will cause the equipment to stop. Therefore, it is better to install a temperature detector.

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Analysis of the causes and measures for the deterioration of IKO imported bearing grease

The grease used in IKO bearings must have an anti-rust effect, and the anti-rust agent should preferably be insoluble in water. The grease should have good adhesion and form an oil film on the surface of the steel. The grease will become soft during machining and cause leakage. In normal operation, the grease will be transferred from the IKO bearing housing to the IKO bearing. If the mechanical stability of the grease is not enough, during the operation, the structure of the soap of the grease will mechanically disintegrate, causing the grease to be destroyed, thereby losing the lubricating effect. If the grease is wrongly selected, all the measures to prevent the IKO bearing are futile. It is important to choose a grease whose base oil viscosity provides sufficient lubrication at the operating temperature. The viscosity is mainly affected by temperature, it decreases with increasing temperature, and it rises when the temperature drops. Therefore, it is necessary to know the viscosity of the base oil at the operating temperature. Mechanical manufacturers often specify the use of certain greases, however most standard greases are available in a wide range of applications.

Grease is critical in the use of IKO bearings. If you use a deteriorated grease, it will not only function as it should, but it will also damage IKO bearings.

1 oil flow observation method

Take two measuring cups, one of which is filled with the lubricating oil to be inspected, the other is placed on the table, and the measuring cup filled with lubricating oil is lifted off the table 30-40 cm and tilted to allow the lubricating oil to slowly flow to the empty cup. In the middle, observe the flow, the quality of the lubricating oil flow should be slender, even, continuous, if the oil flow suddenly and slowly, and sometimes there is a large flow, then the lubricant has deteriorated.

2 handcuffs

The lubricant is rubbed repeatedly between the thumb and the index finger. The better lubricant feels lubricated, less wear debris, and no friction. If you feel a large friction between the fingers, it means lubricating oil. There are many impurities inside, can not be reused, should be replaced with new lubricants.

3 illumination method

On a clear day, use a screwdriver to pry the lubricant at a 45-degree angle to the horizontal. Observe the sunlight and observe the oil droplets. Under the light, it can be clearly seen that there is no wear debris in the lubricating oil, which can continue to work. If the grinding debris is too much, the lubricating oil should be replaced.

4 oil drop trace method

Take a clean white filter paper, drop a few drops of oil on the filter paper. After the oil leaks, if there is black powder on the surface, touch the hand with a feeling of resistance, it means that there are many impurities in the lubricant, good lubricant No powder, it is dry and smooth by hand, and it has yellow marks.

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