Skeleton oil seal
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The choice of oil seal should be based on the sealing medium and working conditions. The sealing medium needs to choose the material of the oil seal. The working conditions mainly consider the use pressure, working line speed, and working temperature range.
When selecting the material of the oil seal, the compatibility of the material to the working medium, the adaptability to the working temperature range, and the ability of the lip to follow the rotating shaft at high speed must be considered. Generally, the temperature of the lip when the oil seal is working is 20~50 ℃ higher than the temperature of the working medium. Attention should be paid when selecting the oil seal material.
The use of ordinary oil seal pressure is generally not more than 0.05MPa. When the working pressure exceeds this value, pressure-resistant oil seals should be selected. (We recommend you pay attention to the "mechanical engineer" public number, the first time to master dry knowledge, industry information)
Under the condition of the same diameter, the oil seal made of different materials has different ability to adapt to the rotational speed of the shaft surface. The linear velocity range used for oil seals is generally less than 15 m/s.
The working range of the oil seal is related to the materials used in the oil seal: when the material is nitrile rubber (NBR), it is -40~120 ℃, Acrylic rubber (ACM)-30~180 ℃, and fluorine rubber (FPM)-25~300 ℃.
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