INA outer spherical bearing lubricants to solve the problem

INA bearing will change its bearing capacity, rotation precision and wear resistance due to its own quality and external conditions during use. When the performance index of the outer spherical bearing is lower than the use requirements and cannot work normally, the bearing will occur. If the fault occurs or 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.

In order to maintain the bearing under good conditions, it should maintain its proper performance and long-term use. Bearings must be inspected and maintained. Inspection and maintenance are important to prevent malfunctions. During operation, it is important to check the rolling noise, vibration, temperature and lubricant of the bearings.

Under the conditions of high speed and high temperature, the adjustment scheme of the combined position and clearance of the outer spherical bearing can be oil lubricated when the grease lubrication is not suitable. A large amount of heat can be taken away by the circulation of the lubricating oil. Viscosity is an important characteristic of lubricating oil. The viscosity directly affects the fluidity of lubricating oil and the thickness of oil film formed between friction surfaces. The viscosity of lubricating oil at INA bearing working temperature is generally 12-15cst. The higher the speed, the lower the viscosity, and the heavier the load, the higher the viscosity. Commonly used lubricating oils include mechanical oil, high-speed mechanical oil, turbine oil, compressor oil, transformer oil, cylinder oil, and the like.

Oil lubrication methods include:

a. Oil bath lubrication

Oil bath lubrication is the most common lubrication method. It is suitable for the lubrication of low and medium speed bearings. Part of the bearing is immersed in the groove. The lubricating oil is brought up by the rotating bearing parts and then flows back to the oil groove. The oil level should be slightly lower than the minimum. The center of the rolling element.

b. drip lubrication

Drip lubrication is suitable for the outer spherical bearing parts that need to be quantitatively supplied with lubricating oil. Considering the structural design of the bearing supporting parts during thermal expansion, the amount of dripping is generally one drop every 3-8 seconds, and excessive oil quantity will cause the bearing temperature to increase.

c. Circulating oil lubrication

The filtered oil is delivered to the bearing components by an oil pump, filtered through the lubricating oil after the bearings, and then cooled and used. Since the circulating oil can take away a certain amount of heat and cool the bearing, this method is suitable for INA bearing parts with high speed.

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Lubricant tips for use in INA plain bearings

Proper installation and maintenance is an important factor in the longest service life of INA bearings. At the same time, attention must be paid to the cleanliness of the bearings, the correctness of the choice of bearings and the selection of appropriate installation and maintenance tools. In addition, the plain bearings must be protected from contamination and moisture and ensure proper installation and lubrication. Therefore, the design of the bearing arrangement, the condition of the oil seal, the type of lubricant and the lubrication cycle, and even the special maintenance play the same and important role.

4, mixed grease

Never mix incompatible greases. If two incompatible greases are mixed, the consistency will usually be soft. In the end, the sliding bearings may be damaged due to the easy loss of grease. If you don't know which grease is used in the INA bearing, you must completely remove the old grease inside and outside the bearing before adding new grease.

There are usually the following basic requirements for lubricants:

(1) It has sufficient lubricating effect, which can reduce the friction of the bearing and inhibit the harmful wear process in the bearing. The frictional resistance is small and the anti-wear ability is large.

(2) Preventing corrosion of the bearing, which itself does not cause corrosion, deterioration or deformation of components of the sliding bearing (such as copper cages, rubber seals, etc.).

(3) It is possible to maintain the necessary lubricating performance within the range of the upper and lower limits of the specified operating temperature, and the chemical composition is stable and the viscosity does not change much.

(4) A sufficiently thick oil film can be established within the range of the upper and lower limits of the specified working speed; it is clean, free of impurities, and has good defoaming properties.

(5) Physical properties and chemical properties are stable enough during the required working period or during the inventory period, so as not to affect the quality of the use.

(6) Maintenance and maintenance are simple and the attachments are as small as possible.

(7) Under the premise of meeting the above technical requirements, economically strive to save.

2. Additional requirements for lubricants

(1) has a good cooling effect.

(2) It has strong adhesion to the surface to be lubricated, and leakage, dripping or scattering is as small as possible; water separation is good.

(3) Mixing a small amount of impurities (such as moisture) does not affect its performance.

(4) It acts as a seal to prevent water or dirt from entering the bearing.

(5) It is not easy to transmit vibration or reduce noise.

(6) Centralized lubrication can be implemented.

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How to choose the type and type of imported bearings

When selecting SKF bearings, it is necessary to select whether the bearings meet our mechanical use range according to the size, specifications, and speed of the bearings. The following is a simple analysis:

The first is the size limit.

Usually the space in which SKF bearings can be installed is limited. In most cases, the shaft diameter (or bearing inner diameter) is limited by mechanical design or other design. Therefore, the choice of bearing type and size is determined by the inner diameter of the SKF bearing. As a result, the main dimensions of standard SKF bearings are based on the international standard internal diameter dimensions.

Standard SKF bearings are available in a wide range of sizes. It is best to use standard SKF bearings when designing mechanical devices. (This design is easy to purchase from SKF bearings. Here is a question. Some models on the bearing catalogue do have some, but some The SKF bearing is not in stock in mainland China, and sometimes the futures will be for a long time, so the time cost and the cost of later replacement should be taken into account when selecting the bearing. The load of the SKF bearing, the load applied to the bearing, its nature and size. The direction is changeable. Usually, the rated base load is shown on the dimension table. However, axial load and radial load are also important factors in selecting a suitable SKF bearing. When the size of the ball and needle bearing is equivalent, the needle bearing usually has a high load capacity and withstands large vibration and shock loads.

Followed by the speed.

The allowable speed is determined by factors such as the type, size, accuracy, cage type, load, lubrication method, and cooling method of the SKF bearing. The permissible speeds of standard-precision SKF bearings under oil lubrication and grease lubrication are listed on the SKF bearing table. Generally, deep groove ball bearings, self-aligning ball bearings, and cylindrical roller bearings are suitable for high-speed operation.

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Structure and classification of KOYO imported bearings

Due to the different working conditions of various machines, KOYO bearings have various requirements in terms of load capacity, structure and performance. The KOYO imported bearings developed on the basis of plain bearings are based on rolling friction instead of sliding friction. Generally, two ferrules, a set of rolling elements and a cage are used for versatility, standardization and serialization. A very high degree of mechanical basics. To this end, KOYO bearings need to have a variety of structures. However, the most basic structure consists of the inner ring, the outer ring, the rolling elements and the cage.

The role of various parts in the bearing is:

For a radial bearing, the inner ring is usually tightly fitted to the shaft and operates with the shaft. The outer ring is usually in a transitional fit with the bearing housing or the mechanical housing bore to provide support. However, in some cases, there is also an outer ring running, the inner ring is fixed to support or the inner ring and the outer ring are simultaneously operated. For a thrust bearing, a shaft ring that fits tightly with the shaft and moves together, and a seat ring that is in a transitional fit with the bearing housing or the mechanical housing bore and serves as a support. The rolling elements (steel balls, rollers or needles) are normally arranged in the bearing between the two ferrules by means of a cage for rolling motion. The shape, size and number of the bearings directly affect the bearing capacity and performance of the bearing. In addition to the uniform separation of the rolling elements, the cage can also function to guide the rotation of the rolling elements and improve the lubrication performance inside the bearing.

1. According to KOYO imported bearing structure type classification

(1) Bearings are classified according to their load direction or nominal contact angle:

1) Radial bearing----Mainly used for bearing KOYO bearings with radial load, the nominal contact angle is from 0 to 45. According to the nominal contact angle, it is divided into: radial contact bearing----the radial bearing with the nominal contact angle of 0: the radial angular contact bearing---the radial bearing with the nominal contact angle greater than 0 to 45.

2) Thrust bearings----Mainly used for bearing KOYO bearings with axial load, the nominal contact angle is greater than 45 to 90. According to the nominal contact angle, it is divided into: axial contact bearing----the thrust bearing with the nominal contact angle of 90: thrust angular contact bearing----the thrust bearing with the nominal contact angle greater than 45 but less than 90.

(2) Bearings are classified according to the type of rolling elements:

1) Ball bearing----rolling body is the ball:

2) Roller bearing----The rolling element is a roller. Roller bearings are divided into: roller bearings----rolling elements are cylindrical roller bearings. The ratio of length to diameter of cylindrical rollers is less than or equal to 3; needle bearings---- The rolling element is a needle roller bearing. The ratio of the length to the diameter of the needle roller is greater than 3, but the diameter is less than or equal to 5 mm; the tapered roller bearing----the rolling element is the bearing of the tapered roller; the spherical roller bearing one by one The rolling elements are bearings of spherical rollers.

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