Self-adaptation sealing-type mechanical sealing device

Abstract

The invention discloses a self-adaptation sealing-type mechanical sealing device. A static sealing ring and a rotating sealing ring are arranged on the outer side of a rotating shaft in an axially opposite mode. The opposite axial end face of the static sealing ring and the opposite axial end face of the rotating sealing ring are sealing faces. The static sealing ring is arranged on a fixed structure through an anti-rotating structure and springs in a positioning mode, wherein the springs are arranged at intervals along the circumference of the static sealing ring. The rotating sealing ring is connected with a shaft sleeve of the rotating shaft in a transmission mode through a transmission structure. An elastic structure provided with axial elastic pushing force towards the directions of the sealing end faces is arranged between the rotating sealing ring and the shaft sleeve. Under a lower-pressure condition, the self-adaptation sealing-type mechanical sealing device a spring-static-type contact-type mechanical sealing device which is consistent with a normally-used type, and sealing with normal long service life operation under the lower-pressure condition can be effectively ensured. Under a high-pressure condition, a sealing type of the self-adaptation sealing-type mechanical sealing device can be changed along with pressures, and the self-adaptation sealing-type mechanical sealing device is automatically converted into a fluid-static-pressure-type mechanical sealing device, can bear high pressure in a better mode, ensures that the sealing is not damaged and effectively prevents disastrous accidents from happening.

Description

technical field [0001] The present invention relates to a structure of a mechanical seal device, especially a mechanical seal structure that can automatically adapt to pressure changes and change the sealing type, that is, as the sealing pressure changes from low to high, the sealing type can be changed from a common type of spring static type to a contact type. The mechanical seal is automatically converted into a hydrostatic mechanical seal, which can better withstand high pressure and ensure that the seal is not damaged. Background technique [0002] In modern industrial applications, especially in equipment conveying high temperature, high pressure or toxic fluids, end face mechanical seal systems realized by stationary seal rings and rotating seal rings have been more widely used. The basic structure of the mechanical seal includes a stationary sealing ring and a rotating sealing ring in an axially opposite manner on the outer side of the rotating shaft, and the opposit...

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Problems solved by technology

If the conventional contact mechanical seal structure is used, it is difficult to ensure normal operation, and if the static pressure seal is selected alone, the end face cannot be guaranteed to open under low pressure, resulting in the wear of the inclination angle of the end face, and finally the sealing parameters do not match the design, and the normal sealing cannot be guaranteed. run

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