Barrel cover shaped slot end surface mechanical sealing structure capable of rotating bilaterally

Abstract

The invention discloses a bidirectionally rotatable barrel-type groove end face mechanical seal structure, comprising a moving ring and a static ring of the mechanical seal, at least one sealing end face of the moving ring or the static ring is provided with a plurality of uniform seals along the circumferential direction. Distributed cylinder cover type fluid dynamic pressure grooves, the dynamic pressure grooves are symmetrical about their own radial centerlines, the dynamic pressure grooves include sequentially connected notches, groove walls and groove roots, and the notches are arranged on the The high-pressure side of the sealing end surface, the groove root is arranged on the low-pressure side of the sealing end surface, the groove wall includes a rectangular groove wall and a tapered groove wall connected in sequence, the rectangular groove wall and the tapered groove wall The small tapered surfaces are connected, and the large tapered surface of the tapered groove wall is connected with the groove root to form a sharp-edged convergent structure. The structure of the invention is simple in shape and structure, and is convenient for design and production. When the moving ring of the device rotates forwardly or reversely with the rotating shaft, a continuous and stable fluid film can be formed between the sealing end faces of the moving and static rings.

Description

technical field [0001] The invention relates to a bidirectionally rotatable non-contact fluid dynamic pressure type mechanical seal end face structure, in particular to a bidirectionally rotatable cylinder cover type groove end face mechanical seal structure. Background technique [0002] Mechanical seals are divided into contact and non-contact. The non-contact mechanical seal does not touch each other during operation, the end faces are not worn, the power consumption is very small, and it can work normally even under high-speed and high-pressure conditions. Compared with ordinary contact mechanical seals, the biggest feature of non-contact mechanical seals is that there are shallow or deep grooves on the sealing end surface with a depth of several microns to several millimeters. When the shaft rotates, these grooves can generate fluid dynamic pressure, so that a small gap of a few microns is maintained between the sealing end faces, and there is a gas film or a liquid fi...

AI Technical Summary

Problems solved by technology

Although the two-way groove has no restriction on the rotation direction of the shaft, its hydrodynamic pressure characteristics are not strong, and the rigidity of the fluid film is insufficient.

Due to the lack of sufficient hydrodynamic press

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