Principle and application of the framework oil seal sealing oil.

Skeleton oil seal structure has three parts: oil seal body, strengthening the skeleton and tight coil spring.

The seal body is divided into the bottom, according to the different parts of the lumbar skeleton oil seal structural map department, cutting edge and the sealing lip.

Typically, the skeleton oil seal in the free state, the diameter is smaller than the shaft diameter, that is, a certain amount of interference.

Therefore, when the oil seals after loading the oil seal seat and the shaft oil seal edge of the pressure and force of contraction of the coil spring from the tight on the shaft a certain radial tightening force, the pressure decreases rapidly after a period of time to run and even disappear, and thus, together with the spring can always compensate for oil seal from the tightening force. .

Sealing principle: oil seal edge to control the oil film between the oil seal and the shaft, this film has a fluid lubrication characteristics.

Skeleton oil seal role in the stiffness of the film happens to make the film in contact with air-side to form a crescent surface to prevent the leakage of working medium in order to achieve the rotation axis of the seal.

Oil seal sealing ability, depending on the thickness of the sealing surface of the film thickness is too large, the oil seal leak; the thickness is too small, dry friction may occur, causing the oil seal and shaft wear;

no oil film between the seal lip and the shaft, you could easily cause heat, wear and tear.

Therefore, during installation, you must put some oil in the ring skeleton oil seal and the vertical axis line, if not vertical, oil seal lubricant seal lip will be drained from the shaft will cause the sealing lip excessive wear.

In operation, the lubricant in the housing slightly oozing a little, in order to achieve the ideal state form a film at the sealing surface.