How does TC frame oil seal work?

What is the working principle of TC skeleton oil seal?
How does the skeleton oil seal work?

Let’s take a look with questions. Let’s look down:

When the skeleton oil seal is in a free state, the inner diameter of the lip of the seal will be smaller than the shaft diameter and there will be a certain amount of interference. After installation, the interference pressure of the cutting edge of the seal will produce a certain radial tightening force on the rotating shaft (if the thickness is too small, dry friction may occur, resulting in wear between the seal and the rotating shaft). After a period of movement, the pressure will be rapidly reduced, and the contraction force of the self-tightening coil spring can compensate for the self-tightening force of the seal at any time, and the combined effect of the two is to produce radial pressure. At work, the lip of the oil seal will form a 0.2-0.55mm wide seal under the action of radial pressure and will contact the ring belt. However, under the action of lubricating oil pressure, the oil will penetrate into the cutting edge and the rotating shaft to form a thin oil film, in order to prevent the leakage of the working medium. Warm reminder, the sealing capacity of the skeleton oil seal will be determined according to the oil film thickness of the sealing surface.

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