DE3600957A1 - Roller serving as a heat exchanger - Google Patents

Abstract

The invention relates to a roller serving as a heat exchanger, which has an outer shell, an inner shell and an annular space, which is defined between the two, through which a heat exchange medium flows and is sealed in the region of the roller ends. The outer shell is centred in the region of the roller ends by centring surfaces on the inside, which cooperate with assigned centring surfaces of annular flanges which are mounted on a shaft which also bears the inner shell. Arranged at at least one roller end on the outer shell next to the centring surface is a circumferential groove for clamping segments which can be inserted therein and are screwed to the end face of the annular flange. In order to prevent axial clamping and deformation, resulting therefrom, of the outer shell, the clamping segments, which are inserted with a close fit into the groove, consist of a resilient material and are angled off, pointing towards the roller end, at an acute angle next to the section engaging in the groove.

Description

Roller serving as a heat exchanger

The invention relates to a roll serving as a heat exchanger with a Outer jacket, an inner jacket and an annular space defined between the two, the a heat exchange medium flows through it and sealed in the area of the roll ends is, with the outer jacket in the area of the roll ends via centering surfaces on the inside is centered, which interact with associated centering surfaces of ring flanges, which are attached to a shaft that also carries the inner jacket, and wherein at least one end of the roll on the outer shell next to the centering surface a circumferential Groove is arranged for insertable clamping segments that are connected to the face of the Ring flange are screwed.

In a known roller of the type described above (DE-PS 32 135 12) the clamping segments have a clamping cone on the side facing away from the groove and the annular flange has a step running in the circumferential direction.

On the step are clamping blocks with the clamping cones of the clamping segments associated conical clamping surfaces supported. When tightening the fastening screws the outer jacket and the ring flange are interposed the Clamping segments and the clamping blocks braced against each other in the axial direction. That has proven itself.

In the case of generic rollers, the outer jacket used to be made of steel manufactured. Increasingly, however, outer jackets made of light metal are used, especially aluminum, in order to take advantage of its good thermal conductivity.

At the same time, efforts are made to save material and weight to reduce the wall thickness of the outer jacket and inner jacket. But then there is due to the axial tension between the ring flange and the outer jacket, there is a risk of Deformation of the outer jacket.

The object of the invention is an axial bracing and resulting Avoid deformation of the outer jacket.

This object is achieved in that the tight fit in the The clamping segments used are made of a resilient material and next to the groove section engaging in the groove at an acute angle, pointing towards the end of the roller, are angled.

This means that there is an exclusively radial tension between the radial flange and outer sheath possible. The only requirement is that the radial clamping forces reliably transferred between the radial flange and the groove wall of the groove in the outer jacket will. However, this is possible if the clamping segments fit tightly into the groove are used, made of a resilient material such as steel, preferably spring steel exist and outside the groove cross-section in the direction of the roll end there are angled. Here, angles of up to 10 °, preferably angles of 5 °, are possible. When the fastening screws are tightened, the clamping segments deform resiliently and at the same time brace the outer jacket with the radial flange.

Because the fastening screws in assigned, face-side threaded holes of the radial flange are screwed in, it can be useful between the clamping element and the end face of the radial flange to arrange a flat support segment that together with the clamping segment is inserted into the groove with a tight fit, - around a level to obtain axial support of the annular flange and an internal bracing of the To avoid ring flange. Appropriately, each tensioning element and each associated Support element aligned through holes for fastening screws on.

In the following an embodiment shown in the drawing is shown the invention explained; They show: FIG. 1 partially an axial section through a serving as a heat exchanger roller, Fig. 2 partially a view in the direction of Pfiels II on the object of FIG. 1.

The roller shown in the drawing consists in its fundamental Structure of an outer jacket 1, an inner jacket (not shown) and a between the two defined annular space 2. The inner jacket, not shown, is over Discs or spokes supported on a shaft, not shown. Through the Annular space 2 flows a heat exchange medium on one side of the inner jacket enters the annulus 2, this flows through and on the other Page emerges again from the annular space 2.

In the area of the outer jacket 1 are on the shaft, not shown Ring flanges 3 attached, only one of which is shown. The ring flanges 3 have centering surfaces 4 on their circumference, which centering surfaces 5 on the inside of the outer jacket 1 are assigned. The centering surfaces of the ring flanges 2 can have one or more grooves 6 for sealing rings 7 accommodated therein.

The outer jacket 1 has an on the inside at at least one end circumferential groove 8 with a substantially rectangular cross-section, in the circumferential direction If necessary, several clamping segments 9 are inserted one after the other at a distance. At the illustrated embodiment, four clamping segments 9 may be used.

In addition to the clamping segments 9, there are also support segments in the groove 8 10 used, each between a clamping segment 9 and the end face 11 of the Ring flange 3 are arranged. The support segments 10 are flat and form a flat support surface for an associated flat section of the end face 11 of the Ring flange 3.

The clamping segments 9 and the support segments 10 are with a tight fit inserted into the associated groove 8.

While the support segments 10 can consist of ordinary structural steel, the clamping segments 9 are preferably made of spring steel. The clamping segments 9 are next to the engaging in the groove 8 portion under one sharpen Angle, which is 5 ° in the illustrated embodiment, pointing towards the end of the roll angled.

The base area of the clamping segments 9 and the support segments 10 results from the illustration in FIG. 2. The clamping segments 9 and the support segments 10 each have aligned through-holes 12, 13 for fastening screws 14, 15, which are in assigned end-face threaded bores 16 of the radial flange 3 be screwed in.

When screwing in and tightening the fastening screws, the outer jacket 1 and radial flange 3 with resilient deformation of the clamping segments 9 radially against each other tense. In the drawing it is also shown that the fastening screws 14.15 secured with a locking plate 17 after tightening the clamping connection are.

- blank page -

Claims (6)

Claims: 1. Serving as a heat exchanger roller with an outer jacket an inner jacket and an annular space between the two defined by one The heat exchanger medium flows through it and is sealed in the area of the roller ends, the outer jacket in the region of the roller ends via centering surfaces on the inside is centered, which interact with associated centering surfaces of ring flanges, which are attached to a shaft that also carries the inner jacket, and wherein at least one end of the roll on the outer shell next to the centering surface a circumferential Groove for insertable clamping segments is arranged with the end face of the annular flange are screwed, characterized in that the tight fit in the groove (8) inserted clamping segments (9) consist of a resilient material and next to the section engaging in the groove (8) at an acute angle, pointing towards the end of the roller, are angled. 2. Roller according to claim 1, characterized in that the clamping segments (9) are made of spring steel. 3. Roller according to claim 1 or?, Characterized in that that the clamping segments (9) are angled by up to 10 °. 4. Roller according to one of claims 1 to 3, characterized in that that the clamping segments (9) are angled by 5 °. 5. Roller according to one of claims 1 to 4, characterized in that that between the clamping segment (9) and the end face (11) of the annular flange (3) a flat Support segment (10) is arranged, which together with the clamping segment (9) at close Fit is inserted into the groove (8). 6. Roller according to one of claims 1 to 5, characterized in that that the clamping segment (9) and the support segment (10) are aligned through bores (12,13) for fastening screws (14,15).