JP2008298410A - Rotary kiln - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rotary kiln used in a cement manufacturing process in which an outer peripheral face of a supporting washer supported by a tire is not ripped out. <P>SOLUTION: In the rotary kiln 3, a shell 2 is rotationally driven at a predetermined speed with cement supplied inside. A supporting roller 9 rollable with respect to the tire 5 when the shell 2 is turned is assembled to the supporting washer 4 fixed to the outer peripheral face of the shell 2 and interposed between the shell 2 and the tire 5. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a rotary kiln.

  As shown in FIGS. 3 to 5, conventionally, in a cement manufacturing process, a rotary kiln 3 including a cylindrical shell 2 having a fire brick 1 attached to an inner peripheral surface thereof is rotatably provided. A predetermined cement is supplied into the kiln 3 to perform a predetermined process such as firing.

  In such a conventional rotary kiln 3, a plurality of support washers 4 are fixed at predetermined intervals in the circumferential direction of the outer peripheral surface at a plurality of locations at predetermined intervals in the axial direction of the shell 2. The shell 2 is rotatably supported by a roller 7 installed on a support frame 6 via a tire 5 fitted on the outer periphery. In the figure, reference numeral 8 denotes a power transmission means such as a gear driven via a drive device (not shown).

  Thus, when the shell 2 is rotationally driven at a predetermined speed via the driving device and the power transmission means 8 in a state where the predetermined cement is supplied into the rotary kiln 3, the tire 5 supported by the roller 7 is It is rotated together with the shell 2 via the support washer 4.

  Here, considering that the shell 2 increases due to thermal expansion, the outer diameter of the support washer 4 that is externally fitted and fixed to the outer periphery of the shell 2 is formed smaller than the inner diameter of the tire 5. Due to the difference between the diameter and the inner diameter, the support washer 4 slides slightly against the inner surface of the tire 5 when the shell 2 and the tire 5 are rotated.

As a prior art document of a rotary kiln, there is Patent Document 1, which has a configuration similar to that shown in FIGS.
JP 2002-173893 A

  The above-described support washer 4 is obtained by bending a flat plain carbon steel into an arc shape, and the inner peripheral surface of the forged steel tire 5 and the outer peripheral surface of the support washer 4 are in surface contact. The outer peripheral surface of the support washer 4 is peeled off, and the support washer 4 and the tire 5 may be worn out. This also applies to the rotary kiln disclosed in Patent Document 1.

  In view of the above circumstances, an object of the present invention is to provide a rotary kiln in which an outer peripheral surface of a support washer supported by a tire is not peeled off.

  The rotary kiln of the present invention is a support roller fixed to the outer peripheral surface of the shell and interposed between the tire and the tire that supports the shell, so that the roller can roll with respect to the tire when the shell rotates. Is incorporated.

  According to the rotary kiln of the present invention, since the support washer is incorporated in the support washer so that it can roll with respect to the tire during rotation of the shell, the relative frictional force of the tire is reduced and wear due to peeling is prevented. An excellent effect can be achieved.

Embodiments of the present invention will be described below with reference to the accompanying drawings.
1 and 2 are examples of embodiments for carrying out the present invention. Thus, in the illustrated example, the surface of each support washer 4 facing the tire 5 is formed in a concave shape, and a plurality of support rollers 9 that can come into contact with the inner peripheral surface of the tire 5 are formed in the concave portion. Is incorporated in parallel with the shell 2. In the figure, reference numeral 10 denotes a washer stopper fixed to the outer periphery of the shell 2. In addition, the same code | symbol is attached | subjected to the thing same as what is shown in FIGS. 3-5 in the figure.

  In the rotary kiln 3 of the illustrated example, when the shell 2 is rotationally driven at a predetermined speed via the driving device and the power transmission means 8 (see FIG. 3) with a predetermined cement supplied therein, the roller 7 The supported tire 5 is rotationally driven together via the support washer 4 and the support roller 9. In this case, the support roller 9 rolls slightly with respect to the inner surface of the tire 5. However, since the support roller 9 and the tire 5 are in line contact with each other, the relative frictional force between the support roller 9 and the tire 5 is reduced, and the peeling is performed. Wear due to is prevented.

  It should be noted that the rotary kiln of the present invention is not limited to the above-described embodiment, and it is needless to say that various changes can be made without departing from the gist of the present invention.

It is an expanded sectional view of the part of the support washer of the rotary kiln of the present invention. It is an II-II direction arrow line view of FIG. It is a general side view of a rotary kiln. FIG. 4 is an enlarged view in the IV-IV direction of FIG. 3. It is an enlarged view of the cross-section lower part of FIG.

Explanation of symbols

2 Shell 3 Rotary kiln 4 Support washer 5 Tire 9 Support roller

Claims (1)

  A support washer that is fixed to the outer peripheral surface of the shell and is interposed between the tire and the tire that supports the shell incorporates a support roller that can roll with respect to the tire when the shell rotates. Rotary kiln to do.

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