Cosine curve mechanical seal end surface structure

Abstract

The invention discloses a cosine curve mechanical seal end surface structure. The structure comprises a movable ring and a static ring of a mechanical seal; the outer ends of the sealing end surfaces of the movable ring and the static ring serve as high-pressure sides, namely upstream, and the inner ends of the sealing end surfaces serve as low-pressure sides, namely downstream; smooth and continuous annular sealing dams are arranged on the low-pressure sides of the sealing end surfaces; multiple periodically distributed curve grooves are formed in the high-pressure sides of the sealing end surfaces; openings at one ends of the curve grooves extend to the upstream of the sealing end surfaces, and the other ends of the curve grooves are positioned at the upstream of the annular dams; micro grooves are symmetrically formed in two sides of each curve groove; and the sealing end surfaces are provided with sealing weirs in non-grooving areas between the curve grooves at the upstream of the annular dams. The cosine curve mechanical seal end surface structure has the following beneficial effects: the structure is obvious in reflux effect, low in leakage rate, capable of being applied to various mediums, high in solid particle preventing capacity, excellent in static / dynamic pressure effect and capable of frequently starting and rotating in two directions.

Description

technical field [0001] The invention relates to a cosine curve type mechanical seal end face structure, belonging to the technical field of fluid seals. Background technique [0002] Shaft end seals are the key components of various rotary fluid machines. At present, the non-contact mechanical seal has become the preferred shaft end seal for high-parameter rotary fluid machinery due to its excellent performance. In order to improve the working reliability of the mechanical seal, enhance the lubricating performance of the seal end face, eliminate end face wear, and reduce the friction coefficient, a certain surface texture or groove is often set on the end face of the moving ring or the static ring to make the mechanical seal fluid The combination of dynamic pressure effect and static pressure effect forms the opening force of the end face, so that a complete fluid lubricating liquid film is formed between the end faces of the dynamic and static rings, and a certain fluid fi...

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Problems solved by technology

[0004] In order to overcome the lack of obvious backflow effect, poor ability to prevent solid particles, and poor sealing performance in the prior art, the present invention provides a kind of seal with obvious backflow effect, small leakage rate, applicable to various media, and strong ability to prevent solid particles , a cosine curve type mechanical seal end face structure with good static and dynamic pressure effect, frequent start-up and bi-directional rotation

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