How to maintain bearings? Several methods of common bearing maintenance.

1. Improve lubrication quality, control oil pressure, temperature and flow, and strengthen oil filtration.

2. Use fuel and lubricating oil that meet the requirements.

3. The diesel generator set should not control the temperature state and work under the conditions of supercooling and overheating. In cold weather, the diesel engine should be warmed up before starting, and the crankshaft should be turned by hand to make the oil enter the friction surface.

4, bearing and journal surface quality and geometry should be strictly guaranteed.

5, bearing clearance should be appropriate, the generator set is too large to produce impact, too small is poor lubrication, may burn tiles.

Second, the bearing maintenance method:

1. When removing the bearing for inspection, make a good appearance record by taking photos and other methods. In addition, before cleaning the bearing, it is necessary to confirm the amount of remaining lubricant and sample the lubricant.

(1) Bearing cleaning can be divided into rough cleaning and fine cleaning, and metal grids can be placed at the bottom of used containers.

(2) In the process of rough washing, use a brush to remove grease or sticky substances from the oil. At this time, if you rotate the bearing in oil, be careful that the rolling surface will be damaged by foreign objects.

(3) During fine washing, slowly rotate the bearing in the oil, which must be carried out carefully. The cleaning agent usually used is neutral non-aqueous diesel oil or kerosene, and sometimes warm lye is used as needed. No matter what kind of detergent you use, you should always filter it to keep it clean. Immediately after cleaning, apply antirust oil or grease to the bearing.

2. Inspection and judgment: In order to judge whether the removed bearing can be reused, the dimensional accuracy, rotation accuracy, internal clearance, mating surface, raceway surface, cage and sealing ring should be emphatically inspected. Because large bearings cannot be rotated by hand, attention should be paid to the appearance of rolling bodies, raceway surfaces, cages and retaining surfaces. The higher the importance of bearings, the more you need to check them carefully.

Extended data:

Quality inspection of bearings;

1, is the packaging clear? Generally, brands produced by regular manufacturers have their own special designers to design the outer packaging and arrange factories with production conditions for production. Therefore, the packaging of products should be very clear and unambiguous from lines to color blocks.

2. Is the steel seal clear? Every bearing product will be printed with its brand words, labels and so on. Although the font is very small, the products produced by regular manufacturers are printed with steel printing technology, and they are pressed before overheating;

So although the font is small, it is deep and clear. Usually, the fonts of counterfeit products are not only vague, but also float on the surface due to rough printing technology, and some of them can even be easily erased by hand, or there are serious manual marks.

3. Whether there is noise: Hold the bearing inner sleeve with the left hand, and move the outer sleeve with the right hand to make it rotate, and listen to whether there is noise during the bearing operation. Due to the backward production conditions of most counterfeit products and completely manual workshop operation, impurities such as dust and sand will inevitably be mixed in the bearing body during the production process;

Therefore, when the bearing rotates, there will be noise or unsmooth operation. This is the key to judge whether the product comes from the brand products of regular manufacturers, which have strict production standards and machine operation.

4. Surface: Whether there are turbid oil stains on the surface requires us to pay special attention when buying imported bearings. Because there is still a certain gap between domestic anti-rust technology and foreign advanced manufacturing countries, it is easy to leave thick oil stains when the bearing body is treated with anti-rust, which makes it feel sticky by hand.

However, almost no traces of antirust oil can be seen on bearings imported from abroad. According to insiders, people who are particularly careful can smell a special smell on imported bearings, that is, the smell of antirust oil.

5. Whether the chamfering is uniform: The so-called chamfering of the bearing is the joint between the horizontal plane and the vertical plane. Due to the limitation of production technology, counterfeit bearing products are not handled satisfactorily at these corners, which is easy for us to distinguish.

Baidu encyclopedia-bearings (parts in mechanical equipment)

Baidu Encyclopedia-Rolling Bearing (Mechanical Engineering Terminology)