The environment in which imported bearings are used and the choice of lubricants

According to the use of parts and conditions of use and environmental conditions to select specifications and accuracy, with the appropriate timken imported bearings is the premise to ensure bearing life and reliability.

1. Location: Tapered roller bearings are suitable for bearing radial and axial combined loads with radial loads. They are usually paired with two sets of timken bearings, mainly for front and rear hubs and active bevel gears of automobiles. , differential, reducer and other transmission parts.

2. Allowable speed: In the environment with correct installation and good lubrication, it is allowed to be 0.3-0.5 times of the limit speed of the imported bearings of timken. Under normal circumstances, it is best to use 0.2 times the limit speed.

3. Allowable tilt angle: Tapered roller bearings generally do not allow the shaft to tilt relative to the housing bore. If tilted, the maximum does not exceed 2'.

4, allowable temperature: under normal load, and the lubricant has high temperature resistance, and the lubrication is sufficient, the general bearing is allowed to work at -30 ° C -150 ° C ambient temperature.

Bearing grease selection

Improper lubrication accounts for 36% of the causes of premature bearing failure. General purpose greases do not meet the needs of a wide variety of special bearing applications. Only one or all common greases are used to meet all timken bearing applications. The problems caused will far outweigh the benefits of the unified brand. Bearing application conditions are very diverse, the correct lubrication is required to match the grease and bearing application conditions.

Bearing grease is the basis for smooth, worry-free operation and maximum reliability, even under the most extreme operating conditions. Grease prevents contaminants from entering the bearing, cushioning shock loads and preventing corrosion. Choosing the right grease in practical applications is the basic condition for obtaining the maximum service life of the bearing.

The criteria for proper lubricant selection include the type and size of the timken imported bearings, temperature, speed, load, and expected service life and relubrication cycle.

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The importance of koyo self-aligning ball bearing lubrication for rolling sound

Core Tip: Lubrication and sealing are very important for any self-aligning ball bearing. Good lubrication and sealing are the guarantee of bearing life. Today we will focus on the lubrication of koyo bearings.
Lubrication and sealing are very important for any self-aligning ball bearing. Good lubrication and sealing are the guarantee of bearing life. Today we will focus on the importance of lubrication and sealing of koyo bearings.

In daily use, many people do not pay attention to the lubrication of self-aligning ball bearings. They believe that lubrication has little effect on the bearings. However, this often leads to a reduction in the life of the bearing. What is the benefit of the lubrication of the koyo bearing?

a. Oil bath Lubricating oil bath lubrication is the most common lubrication method, suitable for the lubrication of low and medium speed bearings. A part of the self-aligning ball bearing is immersed in the groove, and the lubricating oil is brought up by the rotating bearing parts and then flows back. The oil level of the oil sump should be slightly lower than the center of the lowest rolling element.

b. Drip oil lubrication Drip lubrication is suitable for bearing parts that need to supply lubricating oil quantitatively. The amount of oil dripping is generally one drop every 3-8 seconds. Excessive oil quantity will cause the temperature of koyo bearing to increase.

c. Circulating oil lubrication The oil pump is used to transport the filtered oil to the self-aligning ball bearing components, and then filtered and cooled by the lubricating oil after the bearing. Since the circulating oil can take away a certain amount of heat and cool the koyo bearing, this method is suitable for bearing parts with a higher rotational speed.

d. Spray lubrication The dry compressed air is mixed with the lubricating oil by a sprayer to form an oil mist. In the injection bearing, the air flow can effectively cool the bearing and prevent the intrusion of impurities. This method is suitable for the lubrication of high speed, high temperature self-aligning ball bearing components.

e. The injection lubrication oil pump pumps the high-pressure oil into the bearing through the nozzle, and the oil injected into the koyo bearing flows into the oil groove through the other end of the bearing. When the bearing rotates at high speed, the rolling elements and the cage also form a gas flow at the relatively high rotation speed of the surrounding air. It is difficult to send the lubricating oil to the bearing by the general lubrication method. At this time, the lubricating oil must be sprayed by the high-pressure injection method. In self-aligning ball bearings, the position of the nozzle should be between the inner ring and the center of the cage.

Since the temperature is affected by lubrication, speed, load, and environment, the values ​​in the table only indicate the approximate temperature range. Lubrication of bearing lubrication has an important influence on the fatigue life of koyo bearings and friction, wear, temperature rise, vibration, etc. Without normal lubrication, self-aligning ball bearings cannot work. Analysis of the cause of bearing damage indicates that about 40% of bearing damage is associated with poor lubrication. Therefore, good lubrication of the bearings is an effective measure to reduce bearing friction and wear.

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