A mechanical seal

Abstract

The invention discloses a mechanical sealing device and belongs to the field of sealing devices. The mechanical sealing device comprises a mechanical sealing assembly arranged on a rotation shaft in a sleeving mode, a first sealing gland, a second sealing gland, a sealing base, a pumping ring and a fan, wherein the first sealing gland and the second sealing gland are arranged on the rotation shaft in a sleeving mode and arranged on the two sides of the mechanical sealing assembly, the sealing base is arranged between the first sealing gland and the second sealing gland, the pumping ring is fixedly arranged on a movable ring of the mechanical sealing assembly in a sleeving mode, and the fan is arranged on the rotation shaft in a sleeving mode and arranged spaced from the mechanical sealing assembly. An annular sealing cavity is formed among the mechanical sealing assembly, the first sealing gland, the second sealing gland and the sealing base. The pumping ring is located in the sealing cavity. The sealing cavity is internally provided with a liquid medium and a heat conduction block. By means of rotation of the pumping ring, the liquid medium circularly flows in the sealing cavity, and therefore heat produced by working of the mechanical sealing assembly is fully transmitted to the heat conduction block and dissipated through the fan, and then the heat dissipating and cooling of the mechanical sealing assembly are achieved.

Description

Technical field [0001] The invention relates to the field of sealing devices, in particular to a mechanical sealing device. Background technique [0002] A mechanical seal refers to a device that prevents liquid leakage by keeping at least a pair of end faces perpendicular to the rotating shaft under the action of liquid pressure and the elastic force (or magnetic force) of the compensation mechanism and the cooperation of the auxiliary seal to prevent liquid leakage. Mechanical seal components generally include: moving ring, static ring, auxiliary seal, and elastic force compensation mechanism. When working, there is relative movement between the moving ring and the static ring. Under the combined action of the liquid medium pressure and the elastic force of the elastic force compensation mechanism, the dynamic The end faces of the ring and the static ring are tightly attached and a liquid film is formed between the two end faces to achieve sealing. [0003] During the working pr...

AI Technical Summary

Problems solved by technology

[0005] In the prior art, cooling water is used as the flushing medium, but when the transport medium is a low-temperature medium, such as liquefied petroleum gas, liquefied natural gas, etc., the temperature difference between the transport medium and the flushing medium is extremely large, which may easily cause damage to the mechanical seal components, and cooling water is used to Flushing cannot reach the cooling effect of mechanical seal components

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