Diaphragm spring compensation type mechanical sealing device

Abstract

The invention provides a diaphragm spring compensation type mechanical sealing device which comprises a movable ring assembly, a stationary ring assembly, a rotating shaft assembly, a housing assemblyand a gland assembly, wherein the movable ring assembly sleeves the rotating shaft assembly with a space; the stationary ring assembly sleeves the rotating shaft with a space; the movable ring assembly and the stationary ring assembly form a sealing surface through surface contact; and the housing assembly and the gland assembly are fastened and connected through bolts, and the entire movable ring assembly, the stationary ring assembly and the rotating shaft assembly are contained in a cavity of a housing so that a shaft end sealing device is formed. The diaphragm spring compensation type mechanical sealing device is simple in mechanical sealing structure and compact in structure, production, machining and later transportation, mounting and maintenance are facilitated, the use cost is reduced substantially, and pre-tightening force borne by a movable ring is uniform. The movable ring is designed to be in a cylindrical step structure, the integral heat dissipation of the movable ring is facilitated, and the sealing property can be improved more.

Description

technical field [0001] The invention provides a diaphragm spring compensation type mechanical sealing device, in particular relates to the rotary shaft sealing technology in fluid sealing, and belongs to the technical field of mechanical sealing. Background technique [0002] The mechanical seal is an axial end face sealing device that relies on the elastic element to preload the dynamic and static ring end face seal pairs and compress the medium pressure and the elastic element pressure to achieve sealing, so it is also called end face seal. Mechanical seals are widely used in equipment such as centrifugal pumps, centrifuges, reactors and compressors. With the rapid development of the industrial field, mechanical seals are required to adapt to extreme working conditions such as high pressure, high speed, or frequent starting and stopping, and changing working conditions in practical applications, which puts forward higher requirements for the performance of mechanical seals...

AI Technical Summary

Problems solved by technology

But there are some problems as follows: the structure is too complicated and there are too many assembly parts, which brings great inconvenience to the installation, maintenance and disassembly of the product

Most of the existing mechanical seal compensation systems use multiple coil springs so that the tracking performance of the moving ring and the static ring is not ideal

The frictional heat generated between the moving ring and the static ring of the traditional mechanical seal cannot be well dissipated, causing the end face to deform due to uneven heating. In severe cases, the seal end face will crack, which greatly reduces the performance of the mechanical seal.

Even cause the mechanical seal to fail

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