Energy-saving type air-cooled hearth roll

Abstract

The invention discloses an energy-saving type air-cooled hearth roll, which includes a roller, roll heads and roll necks. The roll heads are arranged at both ends of the roller; the roll necks are tapered tubular roll necks with small ends facing the roll heads, and fixedly connect the roller and the roll heads. Further improvement lies in that: the hearth roll also includes a casing; the casing runs through the roll heads, the roll necks and the roller axially, and fixedly connects the inner holes of the two end roll heads; the joints of the roller and the roll necks are provided with partition plates; the partition plates are sleeved on the outer wall of the casing, and airtight cavities are formed between the partition plates and the roll heads' ends and the roll necks' inner holes, the cavities are filled with a thermal insulation material to form a thermal insulation structure. tapered tubular roll neck transition connection is adopted between the roller and the roll heads to significantly reduce stress concentration at the joints of the roller and the roller shaft; the casing is disposed for ventilation cooling so as to significantly lower fuel loss, at the same time a water circulation cooling system is canceled, thus reducing equipment investment and simplifying equipment maintenance. The roll necks are internally provided with a thermal insulation structure, thus significantly reducing the capability of heat transfer from the roller to the roll heads, and obviously improving the bearing working condition.

Description

technical field [0001] The invention relates to heat treatment equipment, in particular to a hearth roller. Background technique [0002] Hearth rollers are installed in the solid solution heat treatment furnace for transporting steel slabs for heat treatment; existing hearth rollers generally include rollers and roller shafts connected to both ends of the rollers, both of which are cylindrical in structure. This structure is relatively simple and easy to manufacture, but because the diameter difference between the roller and the roller shaft is often large, a large stress concentration is likely to occur at the joint between the roller and the roller shaft. Contents of the invention [0003] Aiming at the deficiencies of the prior art, the invention proposes an energy-saving air-cooled hearth roller that can significantly reduce the stress concentration at the junction of the roller and the roller shaft. [0004] The present invention achieves technical goals through the...

AI Technical Summary

Problems solved by technology

[0002] Hearth rollers are installed in the solid solution heat treatment furnace for transporting steel slabs for heat treatment; existing hearth rollers generally include rollers and roller shafts connected to both ends of the rollers, both of which are cylindrical in structure. This structure is relatively simple and easy to manufacture, but because the diameter difference between the roller and the roller shaft is often large, a large stress concentration is likely to occur at the joint between the roller and the roller shaft

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