Dry air-sealed end face groove profile rotating bilaterally

Abstract

The invention discloses a dry air-sealed end face groove profile rotating bilaterally. The dry air-sealed end face groove profile is provided with a movable ring end face, wherein 8-12 dynamic pressure grooves are uniformly distributed on the dynamic ring end face along a circumferential direction; each dynamic pressure groove is concave; the depth of each dynamic pressure groove is 5-15 mum; and each dynamic pressure groove has a concave structure constructed by an inlet arc line which is formed on the outer circumference of a dynamic ring, a left outer-side arc edge and a right outer-side arc edge which are connected to the two ends of the inlet arc line symmetrically, a left outer side straight edge and a right outer side straight edge which are correspondingly connected to the other ends of the left outer side arc edge and the right outer side arc edge respectively and of which the extension lines are vertical to the inner circumference of the dynamic ring, a left groove root and a right groove root which are correspondingly connected to the other ends of the left outer side straight edge and the right outer side straight edge respectively and are parallel to the outer circumference of the dynamic ring and the inner circumference of the dynamic ring, and a middle isolating block of which the periphery is connected with the other ends of the left groove root and the right groove root. Due to the adoption of the dry air-sealed end face groove profile, the sealing pneumatic performance can be improved, the groove profile processing difficulty is lowered, the matching property of a sealed groove profile and the practical requirement is improved, and the higher requirement of modern industry on sealing is met.

Description

technical field [0001] The invention relates to a rotary shaft end face sealing structure. In particular, it relates to a two-way rotating dry gas sealing end face groove type used in the fields of petroleum, chemical industry, metallurgy, aviation and the like. Background technique [0002] Dry gas seal is a kind of gas dynamic pressure effect. Under the condition of relative rotation of two sealing end faces, the sealing groove on one of the sealing faces pumps the fluid between the two sealing end faces to form a gas film and generate a certain amount of pressure. The pressure increase, i.e. the opening force, causes the two sealing faces to seal between rotating and non-rotating parts without contact. Dry gas sealing can use safe gas that is not an operating medium as the sealing medium. It has the advantages of stable operating performance, high reliability, small leakage, and no environmental pollution. It is especially suitable for harsh conditions such as high tempe...

AI Technical Summary

Problems solved by technology

For example, the dovetail groove and the eight-shaped groove have certain sharp corners. When the moving ring rotates at high speed, the sharp corners are very easy to be broken, which affects the sealing effect and causes more serious friction.

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