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The skeleton oil seal is a dynamic sealing element, and the existence of "critical oil film" is a necessary and sufficient condition for oil seal sealing. A leak-free seal is not allowed or impossible. Because the existence of lubricating oil film is indispensable to ensure the oil seal edge to achieve lubricating friction lock, and the existence of lubricating oil film makes - quantitative leakage inevitable. For rotary oil seals, it is permissible if a small amount of leakage occurs within 50 to 100 hours in the initial period of operation. As the operating time increases, the leakage
It will gradually stop, and often such oil seals have a longer life.
The existence of "critical oil film" at the oil seal edge is very beneficial to reduce the wear of the oil seal edge and increase the life of the oil seal, especially when several oil seals are used in parallel, special attention should be paid to the supply of lubricating oil (grease), otherwise, Dry friction will be formed due to lack of oil, causing the oil seal to be burned out. Generally, lithium-based grease is the best choice. In order to ensure the cleanliness of the grease and remove impurities or other harmful impurities accumulated in the grease in time, it is important to replace the grease regularly. Therefore, in terms of structural design, oil injection holes and oil discharge holes must be left. In order to prevent the temperature of the oil seal sealing cavity from rising, it is sometimes important to open ventilation holes.
It will gradually stop, and often such oil seals have a longer life.
The existence of "critical oil film" at the oil seal edge is very beneficial to reduce the wear of the oil seal edge and increase the life of the oil seal, especially when several oil seals are used in parallel, special attention should be paid to the supply of lubricating oil (grease), otherwise, Dry friction will be formed due to lack of oil, causing the oil seal to be burned out. Generally, lithium-based grease is the best choice. In order to ensure the cleanliness of the grease and remove impurities or other harmful impurities accumulated in the grease in time, it is important to replace the grease regularly. Therefore, in terms of structural design, oil injection holes and oil discharge holes must be left. In order to prevent the temperature of the oil seal sealing cavity from rising, it is sometimes important to open ventilation holes.
