Self-lubricating mechanical seal

Abstract

The invention relates to a self-lubricating mechanical seal, relates to the technical field of mechanical seals, and solves the problem of short service life of a common mechanical seal. The self-lubricating mechanical seal comprises a moving ring and a static ring, a self-lubricating ring is arranged between the moving ring and the static ring, and the surface hardness of the moving ring and the surface hardness of the static ring are both greater than the surface hardness of the self-lubricating ring. Sulfide is added into ductile iron/nodular cast iron/alloy steel to a saturated state to prepare the self-lubricating ring, and the sulfur content in the self-lubricating ring is 0.9%-2.5%. The self-lubricating mechanical seal has a self-lubricating function, and is not prone to abrasion and long in service life.

Description

technical field [0001] The present application relates to the technical field of mechanical seals, in particular to a self-lubricating mechanical seal. Background technique [0002] Mechanical seal (mechanical seal) refers to at least one pair of end faces perpendicular to the axis of rotation, under the action of fluid pressure and the elastic force (or magnetic force) of the compensation mechanism, and the cooperation of the auxiliary seal to keep fit and relatively slide to prevent fluid leakage. device. [0003] The main components of the current mechanical seal are the dynamic ring, the static ring and the compression device. During the working process of the mechanical seal, the static ring generally remains stationary, while the dynamic ring will be driven to rotate at high speed and for a long time, and the compression device Driven by the driving force, the moving ring and the static ring are in a state of contact most of the time. [0004] In view of the above-me...

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Problems solved by technology

[0004] For the related technologies mentioned above, the inventor believes that there is the following defect: when running in a dusty environment or a liquid environment with impurities, the moving ring is high-speed and long In the process of time rotation, the contact surface between the moving ring and the static ring keeps friction, and the friction generates heat, which makes the contact surface between the moving ring and the static ring easy to wear, so after a period of use (generally 6-12 Months), the thickness of the moving ring and the static ring will become smaller and smaller until the mechanical seal is damaged and scrapped. It takes a lot of time for the staff to replace the mechanical seal, and the maintenance cost is high. Therefore, the current mechanical seal generally has the problem of low service life. , so it needs to be improved

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