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Smooth door analysis of Swedish SKF bearings
Source: China Bearing Network Time: 2018-04-23
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Mechanical stability grease will become soft during machining; cause leakage. When there is oscillation, for example, the grease will be pulled from the bearing housing into the bearing. If the mechanical stability of the grease is not good; the grease will be thrown out of the bearing continuously; Will cause the mechanical layout of the soap to disintegrate and damage the grease.
Oil seal <br> Oil seal is necessary to protect the bearing and smoothing agent to prevent external pollution; no matter whether the sundries or moisture can not enter the bearing; to prevent damage. Proper device protection is an important factor to promote the longest service life of the bearing. It is necessary to pay attention to the cleanliness of the bearing; the correctness of the bearing selection and the selection of appropriate equipment and protection. Bearings need to be protected from contamination by pollutants and moisture; it is necessary to have the correct device and smooth. , the condition of the oil seal, the type of smoothing agent and the smooth cycle; so that the special protection plays an important role.
Mixed grease
Never mix incompatible greases; if two incompatible greases are mixed; the consistency will generally soften; eventually it will be damaged by the simple loss of grease. If you don't know the original grease used in the bearing; Then we must first remove the old grease in the bearing table;
Classification of greases <br> Differences between temperature and operating conditions: Greases can be classified according to their allowable operating temperatures; the consistency and smoothness of grease can be affected by operating temperatures; bearings operating at a certain temperature must be selected in the same At the temperature, there is a grease with the correct consistency and excellent smoothing effect. The grease is made at a different operating temperature scale; it can be distinguished as low temperature (LT), medium temperature (MT) and high temperature (HT) grease. It is called EP (kneading resistance) or EM (kneading resistance and increasing molybdenum disulfide); adding an additive to strengthen the strength of the smooth oil film.
Choosing grease <br> If you choose the grease by mistake, all the measures to prevent bearing damage are in vain; it is important to select a kind of grease whose base oil viscosity can supply a smoothing effect at the working temperature; the viscosity is mainly affected by temperature. It decreases as the temperature rises; it rises as the temperature decreases. It is therefore necessary to know the viscosity of the base oil at the operating temperature; mechanical producers generally specify the use of certain oils; most of the standard grease can be used. The scale is very wide.
Here are a few important factors in choosing a grease:
â—Mechanical types â—Operation conditions; such as oscillation and the direction of the main shaft are horizontal or straight â— Bearing type and size â— Operating temperature â— Cooling situation â— Working load situation â— Sealing effect â— Speed ​​scale â— Peripheral environment machinery and equipment should be carried forward to the best situation It is necessary for the bearing to get the correct centering work and to prevent extremely high temperature, humidity and pollution.
Proper smoothing and maintenance solutions; and bearing condition monitoring is the key to carrying out the maximum life of the bearing. When the bearing is damaged, it can cause unintended equipment to stop. Even if it is an hour of stop; because the early failure of the bearing can form a grand Loss of production. To ensure the safe operation of the equipment; in addition to relying on high-quality bearings; also pay attention to the operating environment, correct equipment and timing protection.
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