Is Moly grease good for bearings?
In recent years, the research on grease has made great progress. Molybdenum disulfide grease is one of the commonly used greases, and it is mainly used for the lubrication of bearings. And its lubrication in the bearing has some unique rheological properties. However, users have always questioned whether molybdenum disulfide grease is suitable for bearing grease. Therefore, many accustomed choices and methods of use are specious, but in fact there is no gap.
In order to popularize the knowledge of lubrication, this article introduces the properties of some molybdenum disulfide greases and their relationship with bearing lubrication. It may be helpful for the correct selection and use of grease. Under the action of shear, the structural skeleton of the soap fiber of the grease gradually deforms and dissolves each other. Because a part of the soap fiber has been cut, it is generally impossible to completely restore the original consistency. While molybdenum disulfide is a solid lubricating additive, it will not change and keep lubricating all the time. There will be differences due to different raw materials for grease making.
The viscosity and penetration of the grease are very important. From a practical point of view, the penetration is an important indicator of the retention capacity and sealing performance of the grease at the lubricating part, as well as the delivery and refueling methods of the grease. The working condition of molybdenum disulfide grease in the bearing is not easy to be observed. Bearings with high working temperature, low speed or low load, the selection of grease is very different from high-speed bearings. Molybdenum disulfide grease has a good protection for bearing temperature and lubrication life, and can form a sufficient lubricating grease film. Therefore, the bearing can have good lubrication performance even when working in an environment with large torque and high temperature. When choosing a suitable molybdenum disulfide grease to fill the bearing, even if the torque of the bearing increases and the temperature rises, the lubricating life of the grease will not be shortened.
High-quality molybdenum disulfide grease will be convenient for users to choose. Everything that satisfies various lubrication conditions. It must be noted that the consistency of grease does not directly reflect its lubricating properties. The consistency of grease should not be confused with the viscosity of lubricating oil. High-quality grease will increase the service life of the bearing and help the bearing control various indexes, such as the temperature, speed, and load of the bearing.
In order to correctly add and use molybdenum disulfide grease in the bearing, it is necessary to know the movement of the grease in the bearing. Under normal circumstances, the filling amount of molybdenum disulfide grease in the bearing exceeds the actual requirement of directly participating in the grease. The excess grease is not only wasteful, but also harmful. The higher the speed of the bearing, the greater the harm. In the initial stage of bearing operation, as the bearing rotates, most of the grease is quickly squeezed out of the raceway and forms a contour around the rolling element to protect the lubrication and operation of the bearing. When the excess grease is completely discharged, the remaining small amount of grease will form a thin layer of grease film on the contact surfaces of the rolling elements, raceways, and cages, thereby entering the normal operation of the bearing. stage. When measuring the temperature rise of the bearing at startup, it is possible to judge the movement of the grease inside the bearing.
When we know the movement process and benefits of molybdenum disulfide grease in the bearing, we will naturally draw a conclusion: to choose high-quality grease, and the grease in the bearing should not be too much. In addition, the ability of various greases to form a contour in a bearing is different. The contour must be relatively tall and straight, the running time is short, and the bearing temperature is low during long-term operation, and it is stable. This is a kind of It is an ideal grease, so it is especially important for the formation of the grease. If only the product price is pursued and the quality is ignored, the low-quality grease will cause the bearing torque to be high, the temperature is high, and it is unbalanced, it may also produce noise, and the grease is also easy to deteriorate and lose.