The skeleton oil seal, widely used in aerospace, automotive, motorcycle, railway vehicles, ships, home appliances, construction machinery and other industries. Applicable to the sealing of rotary motion and reciprocating motion. Installed in the re-model engines, transmissions, axles, ships, cylinders and other parts. Mainly to prevent the sealing medium (gas and liquid.) Penetration and external foreign body into the body.

　　1, to prevent sand, dust, water vapor intrusion from the outside bearings;

　　2, the limit bearing lubricant leakage. The requirements of the oil seal is the size (diameter, diameter and thickness) should be required; require appropriate flexibility, can axis properly stuck, play a role in sealing; heat resistance, wear resistance, strength, resistance to media (oil or water, etc.), long service life.

　　Rational use of oil seals, should note the following:

　　(1) ambient temperature in the case of using the high temperature should be used in the polypropylene ester or silicon, fluoride, fluorine rubber. And should seek to reduce the oil temperature in the tank. The use of low temperature should be used in cold rubber.

　　(2) of the shaft speed design and structural reasons, the high number of revolutions of the shaft should use the high speed oil seal, the low speed shaft using a low speed oil seal can not be low-speed oil seal for high-speed shaft, and vice versa does not work.

　　(3) the pressure of the seal to withstand the pressure of the poor, excessive pressure on the oil seal will deform. Excessive pressure under conditions of use should be used to strengthen the pressure to the pressure bearing ring or oil seal.

　　(4) install the eccentric oil seal and the shaft with the eccentric is too large, then the seal will deteriorate, in particular, is particularly serious in the shaft speed is high. If the eccentricity is too large, we can use the W-shaped cross-section of the seal.

　　(5) Note that there should be a certain amount of lubricating oil in the oil seal lip.

　　(6) to pay special attention to dust immersed in oil seal.

　　(7) axis surface finish, and a direct impact on the life of the oil seal, ie, shaft finish, the president of the oil seal service life.

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