The motor bearing is an important part of the motor, and its performance and life have a crucial impact on the overall performance and reliability of the motor. Lubrication method is one of the key factors affecting the life and stability of motor bearings. This paper will study and discuss the lubrication mode of motor bearings, and provide selection principles and suggestions, so that readers can have a reference in practical application.
Classification and characteristics of motor bearing lubrication methods
Grease lubrication: Grease lubrication is to fill the grease inside the bearing and bring the grease to the contact surface through the rotation of the bearing to achieve lubrication. Grease lubrication is suitable for low speed, light load, clean working environment, its advantage is that the grease is not easy to lose, can maintain the lubrication effect for a long time, and does not need to add grease frequently. However, the disadvantage of grease lubrication is that the grease is easy to pollute, and under high-speed and heavy-duty working conditions, the fluidity of the grease is poor, and it is not easy to form an effective oil film.
Oil lubrication: Oil lubrication is the circulating flow of lubricating oil inside the bearing, bringing the lubricating oil to the contact surface to achieve lubrication. Oil lubrication is suitable for high-speed, heavy-duty, harsh working environment occasions, its advantage is that the lubricating oil flow is good, can form an effective oil film, reduce friction and wear. However, the disadvantage of oil lubrication is that the lubricating oil is easy to lose, the lubricating oil needs to be added frequently, and the sealing performance is higher.
Oil and gas lubrication: Oil and gas lubrication is to mix lubricating oil and compressed air, and send the oil and gas mixture to the bearing through the oil and gas distributor to achieve lubrication. Oil and gas lubrication is suitable for high-speed, heavy duty, harsh working environment, its advantage is that the mixture of lubricating oil and compressed air can form an effective oil film inside the bearing, reduce friction and wear, and can take away heat and reduce bearing temperature. However, the disadvantage of oil and gas lubrication is that the equipment is complex, the maintenance workload is large, and the performance of the oil and gas distributor is higher.
The selection of motor bearing lubrication needs to consider a number of factors, such as ambient temperature, speed, load, working environment and so on. Here are some principles and suggestions:
Ambient temperature: in low temperature environment, grease or lubricating oil with good low temperature performance should be selected; In high temperature environment, grease or lubricating oil with good high temperature performance should be selected.
Speed: under low speed conditions, grease lubrication can be selected; Under high speed conditions, oil lubrication or oil and gas lubrication should be selected.
Load: under light load conditions, grease lubrication can be selected; Under heavy load conditions, oil lubrication or oil and gas lubrication should be selected.
Working environment: If the working environment is clean and dry, grease lubrication can be selected; If the working environment is harsh, humid, dust and other pollutants, oil lubrication or oil and gas lubrication should be selected.
Bearing type: Different types of bearings have different requirements for lubrication methods. For example, deep groove ball bearings are suitable for grease lubrication and oil lubrication, while tapered roller bearings are more suitable for oil lubrication.
Taking the deep groove ball bearing of a certain type of motor as an example, the speed of the bearing is 3000r/min, the load is medium, and the working environment is relatively clean. According to the above selection principles and suggestions, grease lubrication can be selected as the lubrication method of the bearing. The specific selection process is as follows:
According to the speed and load conditions, the initial judgment can choose grease lubrication or oil lubrication.
Considering the relatively clean working environment, grease lubrication can be selected.
Depending on the bearing type, deep groove ball bearings are suitable for grease lubrication and oil lubrication, so grease lubrication is ultimately selected.
In practical applications, it is necessary to check and maintain bearings regularly, and timely replace bearings with serious wear and lubricating grease or lubricating oil that has failed. At the same time, it is necessary to adjust the lubrication method and lubricant type according to the actual situation to ensure the normal operation of the bearing and extend its life.
In this paper, the lubrication method and characteristics of motor bearing are studied, and the selection principles and suggestions are provided. In practical applications, it is necessary to choose the appropriate lubrication method and lubricant type according to the specific situation to ensure the normal operation of the bearing and extend its life. At the same time, it is necessary to carry out regular inspection and maintenance of bearings, and discover and handle abnormal situations in time. Through the introduction and analysis of this article, I believe that readers have a deeper understanding and understanding of the lubrication mode of motor bearings.
