mechanical seal

Abstract

The invention discloses a mechanical sealing device. The mechanical sealing device comprises a shaft sleeve (2) and a static ring base (3), wherein the shaft sleeve (2) is used for being installed on a rotating shaft (1), the static ring base (3) is used for being connected with an opening in mechanical equipment, the opening allows the rotating shaft (1) to penetrate through, and the static ring base (3) is connected to the shaft sleeve (2) in a sleeving mode. The mechanical sealing device further comprises a first static ring (4), a second static ring (5), a first movable ring (6), a second movable ring (7), a first movable ring base (8), a second movable ring base (9) and a compressed spring (10). According to the mechanical sealing device, the effect that the end faces of the movable rings and the end faces of the static rings are always kept in an attached mode under the condition that the rotating shaft rotates can be ensured.

Description

technical field [0001] The invention relates to the technical field of mechanical seals, in particular to a mechanical seal device. Background technique [0002] A mechanical seal refers to a device that prevents fluid leakage by keeping at least one end surface perpendicular to the axis of the rotating shaft in contact with and sliding relative to each other under the action of fluid pressure and the elastic force of the compensation mechanism and the cooperation of the auxiliary seal. For example, in equipment such as centrifugal pumps, centrifuges, reactors, and compressors, since the rotating shaft runs through the inside and outside of the aforementioned equipment, there will be a circumferential gap between the rotating shaft and the equipment; when the rotating shaft rotates relative to the equipment, the inside of the equipment The medium will leak out through this circumferential gap; if the pressure inside the device is below atmospheric pressure, air will flow int...

AI Technical Summary

Problems solved by technology

However, when the moving ring in the prior art moves axially relative to the static ring, there will still be an instantaneous axial gap between the end face of the moving ring and the end face of the static ring, so that the medium in the equipment will leak out from the axial gap

That is to say, the existing mechanical seal device cannot ensure that the end face of the moving ring and the end face of the static ring are always in a state of being in contact with each other when the rotating shaft rotates.

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