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Home - News - Petroleum Mechanical Seals: Essential Components for Reliable Fluid Containment

Petroleum Mechanical Seals: Essential Components for Reliable Fluid Containment

July 18, 2023

Petroleum mechanical seals, commonly known as end face seals, are essential devices used to prevent harmful fluid leakage. These seals operate based on fluid pressure and magnetic force to enhance the sealing effect. The end surface, perpendicular to the axis of rotation, is carefully fitted and designed for relative sliding, thereby optimizing the quality of the seal.

A petroleum machinery seal consists of four main components: the sealing end face, which is a combination of a moving ring and a static ring; the auxiliary sealing ring; the buffer compensation part, which comprises elastic elements; and the transmission part responsible for promoting the rotation of the moving ring with the shaft. The primary characteristics of petroleum mechanical seals include their long service life, high reliability, minimal leakage, low power consumption, reduced shaft wear, and ability to adapt well to actual production processes that have high sealing requirements. These seals require less frequent maintenance, ensuring smooth operations.

Mechanical seals used in the petroleum industry follow the same basic principles as ordinary mechanical seals. Under the influence of spring force and medium pressure, the non-rotating ring tightly fits the rotating ring. As the rotating ring slides relative to the non-rotating ring, the radial fluid of the medium is blocked. The resulting friction pair becomes the primary sealing mechanism of the mechanical seal. The downward pressure exerted by the spring and the medium compensates for any damage caused by the friction, thereby maintaining a durable and tight connection between the sealing end faces.

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The sealing ring of the mechanical seal serves the additional purpose of compensating for the gap between the ring and the shaft, preventing liquid leakage. A non-compensation ring and gland are used between the sealing end faces. The auxiliary sealing ring, which does not have relative motion, acts as a static seal, effectively preventing the medium from flowing out.

In summary, petroleum mechanical seals play a vital role in ensuring the integrity and reliability of fluid containment in various petroleum applications. By utilizing fluid pressure, magnetic force, and carefully designed sealing mechanisms, these seals provide long-lasting and efficient sealing solutions, minimizing leakage and supporting the smooth operation of petroleum machinery.