Keep these points in mind and your bearing life can be extended 500 times

April 24, 2024

Keep these points in mind and your bearing life can be extended 500 times

The friction pair of mechanical equipment needs to use lubricating oil (grease) in order to expect to reduce the coefficient of friction between the friction pair, reduce the wear of mechanical equipment, and extend the life of the equipment. The bearing life study of SKF shows that the lubrication condition of bearings can make the bearing life difference of 500 times, which shows the importance of lubrication to extend the life of mechanical equipment.

Daily check of lubricating oil

Visual inspection of lubricating oil, or performance detection of the use of the lubrication system, to see whether the physical and chemical indicators of lubricating oil are normal, to a certain extent, you can predict whether there is the possibility of mechanical failure. Therefore, the daily "lubricating oil spot inspection" is very important in the maintenance of mechanical equipment. The main contents are as follows:

Key points of daily maintenance of thin oil lubrication system

Point 1: Regularly check the physical and chemical properties of lubricating oil. The aging pollution of lubricating oil is finally reflected in the appearance. Through naked eye observation:

(1) Transparency: the lubricating oil is sampled into the test tube, "turbidity" shows that there is water mixed, it should be a "transparent" liquid, if there is sediment at the bottom of the test tube after sampling, it needs to be filtered or replaced immediately;

(2) Color change: lubricating oil must change color after oxidation in use, and its change is different due to different lubricating oil grades.

Point two: When replacing lubricating oil, it is necessary to confirm its cleanliness.

Point 3: Record the amount of lubricating oil in detail, for the total loss lubrication device, the lubricating oil is reduced to normal, for the circulating lubrication device, the lubricating oil is reduced to abnormal, indicating that there is a place in the oil leakage, carefully check and record the reason for the reduction.

Point four: strictly control the type of lubricating oil, the selection of grease can refer to the lubrication oil recommended by the mechanical equipment supplier, but when the equipment is too much and still insists on using the manufacturer's recommended oil, the types become a variety, not only inconvenient management, but also the risk of oil supply error. To this end, the quality and viscosity of the lubricating oil are compared, the similar oil species are summarized, and the types of oil are reduced as much as possible.

Point five: The amount of the lubrication part should be appropriate, and the liquid level of the lubricating oil is determined by the appropriate position of the lubrication method. If the lubricating oil is added too much, the oil is stirred too aggressively, producing bubbles, reducing the function of the lubricating oil, and the lubricating oil is easy to age prematurely.

Point six: the life of the lubricating oil is closely related to the temperature, and the temperature of the lubricating oil should be strictly controlled. Generally more than 60 ° C, every rise of 10 ° C, the oxidation rate is 2 times, the life of the lubricating oil is reduced by half, in order to extend the life of the lubricating oil, it is necessary to control the rise of the oil temperature.

Point seven: Avoid mixing different lubricants, which will cause chemical reactions between additives in lubricating oil resulting in additive precipitation, causing the separation of additives, and poor lubrication of mechanical equipment friction pairs. In this case, it is necessary to clean the lubrication system before use.

Point eight: Resolutely do not let go of any small oil spills, even very small oil spills, the monthly, annual amount is considerable. The table below calculates the tiny leaks for a day, month, and year (in liters).

Calculation method of thin oil microleakage

Point nine: Can not only select oil according to the viscosity of lubricating oil, different lubricating oil, even if the viscosity is the same, the nature of the oil will change and become a completely different oil.

Point 10: Avoid choosing the wrong viscosity of bearing oil, if the viscosity is high, it often causes the bearing temperature to rise, resulting in vibration, buzz, bearing wear and so on.

It is forbidden to change the lubricating oil grade at will. Lubricating oil should be selected according to its purpose, conditions of use and methods. If the wrong choice is made, the lubricating oil can not play the proper lubrication role, but cause mechanical equipment failure.

Grease lubrication system routine maintenance points

First, the choice of grease lubrication or thin oil lubrication depends on the heat of the bearing, so it should be correctly selected. Grease has no cooling effect, and there are many examples in practice of changing grease lubrication to lubricating oil lubrication, such as oil mist lubrication of continuous casting machine.

Key two, the correct selection of the cone penetration of grease.

Third, when the bearing is hot, you can try to use a higher consistency grease.

Point four, the correct choice of fat cycle and fat amount.

Point five, do not remove the cover when feeding oil into the grease pump tank. Even if it is clean grease, if the top cover is removed and the oil is fed, the impurities in the air will be mixed together, and the air will enter the grease tank and be sent into the lubrication pipe.

Point six, after fat to confirm the work, if the acceleration is lower than the previous normal value without change, as normal; If the acceleration value rises, the bearing may be damaged and must be repaired as soon as possible.

Do not ignore the spot inspection of the grease distribution pipe, the grease distribution pipe is prone to detachment, bending, flattening, blocking and breaking, resulting in major equipment failures, so it is necessary to strengthen the spot inspection of the distribution pipe.

Point eight, do not blindly trust automatic grease pump.

Point 9, hand movement bearing grease, need to open the oil drain hole motor bearing parts generally grease and grease outlet, grease outlet in the motor bearing parts below, so generally not much attention, if you do not open the oil drain hole to oil, motor bearing part will accumulate grease, motor coil heat is not easy to release, eventually prone to poor insulation and damage.

Grease lubrication system routine maintenance prohibited points

When greasing bearings or gears, the use of a brush or brush will be mixed with hair removal, and special tools for grease should be used to implement the oil.

Point two, prohibit the mixing of two greases If two greases are mixed, often the performance of the grease is reduced. Under normal circumstances, the mixing of different types of greases will produce unexpected adverse consequences.

Grease grease to machinery is like our drinking water. The injection of contaminated grease will cause equipment failure and troubleshooting is more difficult.

① Requirements for grease operation should be complied with:

② Confirm the lubricating oil;

③ The oil feed port should be cleaned before and after the grease feeding operation;

④ Use clean special tools;

Do not leave the lid of the grease tank open.

The grease pump or grease nozzles are prohibited from being fed in a contaminated state.

The use of dirty gloves or appliances to fill the grease gun with grease, which is easy to mix with garbage or fibers, enter the friction pair of mechanical equipment, and produce early damage.

Grease has no cooling effect, excessive filling grease, the heat generated when the equipment is running is not easy to disperse, easy to cause the grease to burn and caking, resulting in equipment failure.

It is forbidden to give oil in the shutdown state, and it is easy to give too much fat to the equipment that has been stopped, which will cause the bearing temperature to rise when it is run again.

The use of grease in a high temperature environment will rapidly consume antioxidants, and the oxidation of the Base Oil will be rapid, so that the lubrication is poor. When automatic or manual remote grease feeding, the piping path should avoid high temperature environment, or take heat insulation measures.

After the grease distribution pipe is connected, the grease distribution pipe should be carefully connected to the oil side of the pipe, remove the oil side of the pipe, and then start to grease. After the distribution pipe is filled with grease, scrape off about 2cm of grease from the end of the distribution pipe and connect it to the oil nozzle on the receiving side before grease is fed.

During the maintenance of mechanical equipment, sometimes the pipe is flattened and bent, at this time, it is necessary to re-pipe the pipe, and the connection is carried out after the pipe is filled with grease. If the empty pipe is connected, the initial oil is very difficult, and the automatic grease feeding device sometimes takes several days to normally supply grease.

If the grease pipe is too long and the pipe is too long, it will increase the resistance of the pipe, the grease is difficult to reach, the possibility of the pipe breaking and breaking will increase, and the grease in the pipe is also easy to age.

Bearing lubrication routine maintenance prohibited points

Point 1, do not make the bearing contaminated with pollutants;

Second, the new bearing should not be assembled in its packaging state;

3. When greasing the bearing seat with oil seal, remove the oil drain plug. If there is no oil drain port, use a screwdriver to vacate the gap on the oil seal and grease it, otherwise, the pressure of grease will easily make the oil seal fall off from the mounting groove of the bearing seat;

Point four, do not install the bearing oil hole on the pressure side.

Bearing lubrication routine maintenance prohibited points

The grease in the bearing will be lost due to high temperature, resulting in reduced performance;

Point two, prohibit cleaning oil bearing oil bearing even if contaminated, do not use cleaning oil. Once the cleaning oil is used, the oil contained in it is washed away, resulting in insufficient lubrication and causing wear.

The above is the Keep these points in mind and your bearing life can be extended 500 times we have listed for you. You can submit the following form to obtain more industry information we provide for you.

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