Novel rotary movable sealing element

Abstract

The invention provides a novel rotary movable sealing element. The novel rotary movable sealing element is made of a compressible material and is of a ring structure. Convex arc surfaces are formed in two end faces of the sealing element; the inner ring face and the outer ring face of the sealing element are approximate planes and are used for producing wider sealing contact faces; a circle of scraping ridges which are distributed in an equal distance and form a certain included angle with the axis of the sealing element are arranged at one side, close to a sealed medium, of the outer ring face of the sealing element; the other region of the outer ring face is a cylindrical face; a circle of trapezoid-shaped groove is formed in the cylindrical face. According to the novel rotary movable sealing element, better sealing performance can be realized under the rotary motion movable sealing state, the inclined scraping ridges on the sealing element can be used for scraping oil on a piston wall, and interface leakage which occurs when the sealing element rotates is reduced; the novel rotary movable sealing element has a certain self-lubricating capacity, and the friction resistance and abrasion condition of the sealing element under a work state are reduced. The sealing element is simple and reliable in structure, low in production cost and better in universality.

Description

technical field [0001] The invention relates to the field of seal design, in particular to a novel rotary dynamic seal. Background technique [0002] Machinery and equipment used in industry are generally equipped with sealing devices, but there are leakage problems. Leakage will cause waste of energy, loss of materials, decline in product quality, damage to equipment, and environmental pollution, thereby damaging the health of staff, and even causing fire, explosion, production shutdown, and direct danger to personal safety. huge economic loss. Although the seal is not big, it is only a component, but it can determine the safety, reliability and durability of machinery and equipment, especially petrochemical enterprises, which mostly deal with corrosive or flammable, explosive and toxic media. However, there are often higher pressures and temperatures. Once leakage occurs, it will cause major safety accidents and cause greater harm. [0003] Based on the importance of se...

AI Technical Summary

Problems solved by technology

The current problem is that in the rotary motion seal, oil seals and mechanical seals are usually used, but the operating pressure of the oil seal is low, and compared with the present invention, it is too large and complicated

Although mechanical seals can be used for high pressure (40MPa), high speed (50m / s) and high temperature (400°C), but the structure is more complex, bulky, and costly, it is only suitable for some heavy machinery equipment such as petroleum and chemical industry

O-rings are also used in rotary seals due to their small size, simple structure, low cost, and good process performance; but the main problem is that frictional heat is generated at the contact between the high-speed rotating shaft and the O-ring , so that the rubber material is severely deformed by heat, accelerates the aging of the sealing material, and reduces the service life of the O-ring

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