Heating device of annular part and annular cavity of heating device

Abstract

The invention provides a heating device of an annular part. The heating device is used for heating the annular part through a thermal current and comprises a current heater and a fan, and further comprises an annular cavity for holding the annular part, a current inlet and a current outlet are formed in the outer wall of the annular cavity, the current heater is used for heating a current, the fan enables the current to enter the current inlet, and the current is discharged from the current outlet after passing through a current path in the annular cavity. According to the heating device, a current circulating path is saved, so that the current path can be concentrated near the annular part, and therefore, the heat exchange is more effective. Meanwhile, the material consumption during manufacturing the heating device is reduced, and the manufacture cost is lowered. In addition, the invention further correspondingly provides an annular cavity of the heating device. The annular cavity is used for holding the heated annular part, and the current inlet and the current outlet are formed in the outer wall of the annular cavity.

Description

technical field [0001] The invention relates to a heating device and its annular cavity, in particular to a heating device and its annular cavity which use gas as a heat exchange medium to heat an annular component. Background technique [0002] For the heating of large ring parts (for example, in the bearing shrink-fit method, large bearings need to be heated), oil bath, electromagnetic induction eddy current heating and air heating are generally used. Among them, the way of air heating is used more. Take the air heating furnace used in the bearing heat sleeve method as an example. The air heating furnace uses hot air as the heat transfer medium to heat the surface of the heat sleeve bearing parts. The heating method is mainly convective heat transfer, supplemented by radiation heat transfer. . [0003] Such as figure 1 As shown, it is a schematic structural diagram of an air heating furnace in the prior art, which shows the structure of a typical heating furnace for shr...

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Problems solved by technology

[0005] 1) There is waste in the air flow path

[0006] As the radial dimension of the bearing increases, the space in the central area within the annular area of ​​the bearing component will also increase. When the radial dimension of the bearing increases to the order of several meters, when such a bearing component is heated, the central area The space is superfluous for the convective heat transfer between the bearing surface and the hot air, and there is a huge waste in the air flow path

At the same time, as the size of the bearing components increases, in order to make the air flow fully flow, the power of the drive motor of the fan also increases, and the power consumption also increases.

[0007] 2) There is a waste of materials in the manufacture of heating devices

At the same time, due to the enlargement of the overall structure, in order to ensure the strength, the size of the main beam structure of the heating furnace body will also increase, and the material consumption will further increase, thereby greatly increasing the manufacturing cost

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