Mechanical sealing device and application thereof

Abstract

The invention relates to a mechanical sealing device. The sealing device comprises a positioning sleeve, a moving friction ring, a fixed friction ring and a stop ring, wherein the positioning sleeve comprises a positioning sleeve body, an outer mounting surface, an inner mounting surface which is used for mounting a roll shaft to be sealed in a sleeving manner, and a first sealing groove which isformed in the inner mounting surface, wherein a first sealing ring is assembled in the first sealing groove; the moving friction ring comprises an assembling surface which forms a second sealing groove with the outer mounting surface of the positioning sleeve, and a first moving sealing surface which is protruded in the axial direction of a main body of the moving friction ring; a second sealing ring is arranged in the second sealing groove; the fixed friction ring comprises a first end of a second moving sealing surface corresponding to the first moving sealing surface of the moving frictionring and a second end which is provided with a permanent magnet ring; and the stop ring comprises a permanent magnet repulsion ring corresponding to the second end of the fixed friction ring, so thata magnetic levitation repulsion pair is formed between the fixed friction ring and the stop ring. By adopting the mechanical sealing device and application thereof provided by the invention, the structure is refined; and the convenience in installation, regulation, use and maintenance is improved.

Description

technical field [0001] The invention relates to the field of mechanical seals, in particular to a mechanical seal device and its application. Background technique [0002] At present, in the technical field of dynamic sealing of slab continuous casting rolls and slab electromagnetic stirring rolls, commonly used dynamic sealing structures include: radial oil seal, rotary seal, and axial mechanical seal. These technologies and methods are more or less deficient, and some have low sealing reliability, and some have short service life and potential safety hazards. The oil seal is easy to age, the friction force of the sealing surface is large, it is easy to wear, and it is easy to fail. The main sealing surface of the existing mechanical seal is fragile, and the distribution spring is used to provide the retention force of the sealing surface. The failure rate of the sealing surface is uneven, and the failure rate is mainly used for auxiliary static sealing. The high pressure ...

AI Technical Summary

Problems solved by technology

These technologies and methods have more or less deficiencies, some have low sealing reliability, and some have short service life and potential safety hazards

The oil seal is easy to age, the friction force of the sealing surface is large, it is easy to wear, and it is easy to fail. The main sealing surface of the existing mechanical seal is fragile, and the distribution spring is used to provide the retention force of the sealing surface. The failure rate of the sealing surface is uneven, and the failure rate is mainly used for auxiliary static sealing. O-ring high pressure area is prone to rolling failure

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