The cleanliness of bearings has a considerable impact on the life of bearings. The higher the cleanliness of bearings, the longer the life of bearings. Lubricating oil with different cleanliness has a great impact on the life of ball bearings. Therefore, improving the cleanliness of lubricating oil can prolong the life of bearings. In addition, if the lubricating oil containing dirt particles is controlled below 10um, the life of bearings will also increase by several times.

(1) Impact on vibration: cleanliness seriously affects the vibration level of bearings, especially the vibration in high frequency bands. High cleanliness of the bearing vibration speed value is low, especially in the high frequency band.

(2) Impact on noise: The impact of dust in bearing grease on noise has been tested, and it is proved that the more dust, the greater the noise.

(3) Influence on lubrication performance: the decline of bearing cleanliness not only affects the formation of lubricating oil film, but also causes the deterioration of grease and accelerates its aging, thus affecting the lubrication performance of grease.

1, surface cleaning: cleaning must be based on the nature of the rustproof surface and the conditions at the time, select the appropriate method. Commonly used solvent cleaning method, chemical treatment cleaning method and mechanical cleaning method.

2, the surface of the dry cleaning can be dried with filtered dry compressed air, or dry with 120-170 ℃ dryer, can also be dried with clean gauze.

3, soaking method: some small items are soaked in antirust grease, cross tapered roller bearing to make its surface adhere to a layer of antirust grease method. Film thickness can be achieved by controlling the temperature or viscosity of the antirust grease.

4, brush coating method: for outdoor construction equipment or special shape products that are not suitable for soaking or spraying, pay attention not only to accumulation, but also to prevent leakage.

5, spray method: some large antirust can not use immersion method oiled, bearings generally use about 0.7mpa pressure of filtered compressed air in clean air spray. Spray method is applicable to solvent dilution antirust oil or thin layer antirust oil, but must use perfect fire protection and labor protection measures.

Attention should be paid to bearing rust removal can not use the following acid: sulfuric acid, hydrochloric acid, dilute sulfuric acid, dilute hydrochloric acid. Because these acids will destroy the good metal parts, these liquids should never be used!

There are several liquids in daily life that can remove rust without harming the good metal parts, but the effect is not the same, the first is dilute oxalic acid, and the ratio of 3:1 to water, dilute oxalic acid 3, water 1. It’s slow, but it works, and it’s sold everywhere. The second is gun oil, also called mechanical derusting oil, not very good to buy, this oil can quickly derusting, the effect is very good.

E-mail:bearing6@hyzcgroup.com