Fin-shaped groove mechanical seal end face structure for unidirectional rotation

Abstract

The fin-shaped groove mechanical sealing end face structure comprises a movable ring and a static ring which are used for mechanical sealing, the movable ring and the static ring are each provided with a sealing end face, the outer ring edge side of each sealing end face is a sealing high-pressure side, namely the upstream, and the inner ring edge side of each sealing end face is a sealing low-pressure side, namely the downstream. An annular sealing dam is arranged on the sealing low-pressure side of the sealing end face, a plurality of fin-like grooves consistent in rotation direction are formed in the sealing end face of the static ring and / or the sealing end face of the movable ring in the circumferential direction, each fin-like groove is provided with an inner end and an outer end which are opposite, the outer ends of the fin-like grooves communicate with the outer circumferential wall of the sealing high-pressure side to form groove openings, and the inner ends of the fin-like grooves communicate with the outer circumferential wall of the sealing high-pressure side to form groove openings. The inner end of the fin-like groove is connected to the annular sealing dam; and a sealing weir is arranged between every two adjacent fin-like grooves. Compared with the prior art, the sealing structure has the beneficial effects that the fluid dynamic pressure effect and the liquid film rigidity are higher, and contact abrasion of the sealing end face is reduced; and a lower leakage rate can be ensured under the same bearing capacity.

Description

technical field [0001] The invention belongs to the technical field of mechanical seal structures, and relates to a fin-shaped groove mechanical seal end face structure for unidirectional rotation. Background technique [0002] 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. The technical key point of the non-contact mechanical seal is the hydrodynamic pressure groove on the sealing end face, and different groove types have different hydrodynamic pressure characteristics. According to the characteristics of the rotation direction of the main shaft, it corresponds to two types of groove types: one-way groove and two-way groove. The one-way groove is suitable for the working condition that the main shaft rotates in one direction. The groove type generally adopts a spiral groove, and the spiral groove type is ...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the technical problem of high leakage rate of the existing spiral groove groove, the present invention provides a fish fin groove mechanical seal end face structure with good hydrodynamic pressure effect and small leakage for unidirectional rotation

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