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Oil seals work and seal principle

Update:2019-01-21

What is petroleum (oil)? - One of the main objects of geological exploration is a viscous, dark brown liquid called "industrial blood." There is oil storage in parts of the upper crust.

Petroleum rubber seal, usually referred to as “end face sealing”, is a device to avoid the outflow of harmful fluids. In the working principle, the sealing effect is improved by the action of the pressure and magnetic force of the fluid, so that it is perpendicular to The end faces of the axis of rotation remain snug and relatively slid, thereby improving the quality of the seal.

The petroleum rubber seal used in the petroleum field is basically the same as the ordinary petroleum rubber sealing ring. Under the action of the spring force and the medium pressure, the non-rotating ring closely fits to the rotating ring, and rotates. During the process, the two sides slide relative to each other, and the radial flow of the medium is prevented. The friction pair formed at this time is the main seal of the petroleum rubber seal.

The downward push of the spring and the medium pressure compensates for the damage experienced by the friction pair through the friction, thereby maintaining the durability of the close contact between the sealing end faces. The seal of the petroleum rubber seal can also compensate for the gap created between the ring and the shaft to avoid leakage of liquid from the gap.

A non-compensating ring auxiliary seal is used between the non-compensating ring and the gland, which prevents the medium from flowing out therefrom. In practical applications, the auxiliary seal of the petroleum and petroleum rubber seals does not have a relative motion state, and is a static seal. In addition, in the selection of the seal ring, the "O" ring is generally selected, or the gasket can be used for processing.