Sealing device for internal mixer

Abstract

The invention belongs to the technical field of internal mixer machines, and particularly relates to a sealing device for an internal mixer. The sealing device comprises a mixer chamber and a rotor. Arotating shaft is arranged at the end of the rotor. A bearing hole is formed in the side wall of the mixer chamber. The part, away from the rotor, of the rotating shaft is sequentially sleeved with amoving sealing ring, a static sealing ring and a gland. The moving sealing ring and the static sealing ring are arranged in an inner cavity of the bearing hole. The gland and the outer side wall of the mixer chamber are fixedly connected through a fastener. The gland is further fixedly connected with the static sealing ring through a fastener. Two or more grooves are formed in the outer side wallof the mixer chamber at intervals. Convex rings matched with the grooves are arranged on the gland. According to the sealing device, the multiple convex rings and the grooves are clamped and connected to form a labyrinth seal structure, and therefore the leaking path of materials is prolonged, and the aim of preventing material leaking is achieved; and the sealing device is good in sealing effect, material leaking can be effectively avoided, and material waste can be reduced.

Description

Technical field: [0001] The invention belongs to the technical field of internal mixers, in particular to a sealing device for internal mixers. Background technique: [0002] The internal mixer is a high-strength intermittent mixing equipment widely used in the rubber industry. It is mainly used for mixing rubber or plastic with compounding agents, and can also be used for masticating rubber or plastic. During the working process of the internal mixer, in order to prevent the material from leaking from the gap between the rotating shaft of the rotor and the mixing chamber, a sealing device is usually provided at the connection between the two ends of the rotating shaft and the mixing chamber. The sealing device includes a dynamic sealing ring and a static sealing ring. The dynamic sealing ring is sleeved on the end of the rotating shaft and can rotate relative to the static sealing ring driven by the rotor. The static seal ring is set on the seal dynamic ring, and one end ...

AI Technical Summary

Problems solved by technology

[0003] However, since the working process of the internal mixer is under high pressure, and the rotor and the shaft are in motion, the material will still flow from the gap between the static seal ring and the end face of the rotor, the gap between the shaft and the dynamic seal ring, and the gap between the dynamic seal ring and the rotor. The gap between the static seal rings leaks out of the mixer

In this way, it will not only cause waste of materials, but also further cause the machine to release pressure, thereby reducing the processing efficiency

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