DE8913313U1 - mill - Google Patents

Description

mill

The innovation relates to a mill according to the preamble of claim 1. 5

Cylinder mills (tube and drum mills) of large dimensions have so far generally been divided into individual cylinder sections for transport reasons (i.e. they are divided vertically when stored horizontally), with the cylinder sections being connected at the assembly site by welds or flanges.

The races used to support the mill cylinder are generally made in one piece and are only connected to the mill cylinder at the assembly site in order to reduce the transport dimensions.

The concentricity and axial runout of the system had to be adjusted by complex alignment work at the installation site.

For the reasons explained, the known mill designs require complex transport - especially for large diameters - and time-consuming and costly assembly.

The innovation is therefore based on the task of designing a mill according to the preamble of claim 1 in such a way that transport and assembly are significantly simplified, particularly when the diameter of the mill cylinder is large.

This object is achieved according to the invention by the characterizing feature of claim 1. Appropriate design

Designs of the innovation are the subject of the subclaims.

In the new mill, the mill cylinder and the races are divided lengthwise (i.e. horizontally) and the sections are connected to each other via flanges.

This longitudinal division significantly improves the transport options, especially for mill cylinders with large diameters, as the critical transport dimensions are reduced.

Furthermore, assembly is made much easier because the mill cylinder and raceway sections can be aligned to one another in a simple manner, for example using fitting screws, keys or shaped pieces. The concentricity and axial runout of the system can be ensured by a simple fixation.

If the innovation is designed appropriately, the inner diameter of the mill cylinder and the inner diameter of the race ring are at least approximately the same size. This results in a compact design, whereby the available inner length of the mill cylinder is used optimally. The compact design achieved in this way reduces the weight and thus lowers the manufacturing and transport costs.

A practical minimization of the flange surfaces further reduces manufacturing costs.

An example of the innovation is illustrated in the drawing.

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Fig.l

Fig.2

Fig.3

Fig.4

a side view of a large diameter mill according to the innovation,

a front view of the mill according to Fig.l,

a section along the line &Igr;&Igr;&Igr;-&Igr;&Idigr;&Igr; of Fig.l,

the detail &khgr; from Fig.l in enlarged scale (sectioned).

The mill shown contains a mill cylinder 1 of large diameter as well as race rings 2, 3 provided in the area of the two front ends of this mill cylinder, which are mirror-imaged, so that only the race ring 2 will be explained in more detail below.

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The races 2, 3 serve to rotatably support the mill cylinder 1 about a horizontal axis 4, whereby the bearing on which the race 2 runs is identified in Fig.4 with the reference number 5.

The mill cylinder 1 and the races 2, 3 are divided longitudinally, i.e. horizontally. The sections la, 1b of the mill cylinder and the sections 2a, 2b and 3a, 3b of the races 2, 3 are connected to one another via flanges.

Here, the flanges lc, Id of the mill cylinder sections la, Ib are provided on the outer circumference of the mill cylinder 1 (cf. Fig.3).

The flanges 2c, 2d of the race ring sections 2a, 2b (as well as the corresponding flanges of the race ring sections 3a, 3b) are arranged on the outside of the race ring web facing away from the mill cylinder 1 (eg 2' according to Fig.4) and on the inside of the associated race ring bandage 2' ^1. The race rings have - as Fig.4 shows - a T-shaped cross section consisting of the aforementioned race ring web 2' and the race ring bandage 2''.

O The mill cylinder sections la, Ib are each welded to the raceway sections 2a, 2b and 3a, 3b which are axially extended therefrom (i.e., for example, the mill cylinder section la with the raceway sections 2a and 3a and, correspondingly, the mill cylinder section Ib with the raceway sections 2b and 3b).

As can be seen from Fig.4, the inner diameter D of the mill cylinder 1 and the inner diameter D ¹ of the race ring 2·· are at least approximately the same size, which results in a very compact design and a particularly good utilization of the available cylinder inner length.

The weld seam between the mill cylinder section la and the raceway section 2a is indicated in Fig.4 with the reference number 6. 7 is the armoring attached to the inside of the mill cylinder and the raceway. Finally, 8 designates a front disk connected to the raceway 2.

Claims (5)

Protection claims 1. Mill, containing a) a mill cylinder (1) of large diameter and b) races (2, 3) provided in the area of the two front ends of the mill cylinder (1) for the rotatable mounting of the mill cylinder about an approximately horizontal axis (4), characterized in that c) the mill cylinder (1) and the races (2, 3) are divided longitudinally and the sections (la, 1b, 2a, 2b, 3a, 3b) are connected to one another via flanges (Ic, Id, 2c, 2d). 2. Mill according to claim 1, characterized in that the flanges (lc, Id) of the mill cylinder sections (la, Ib) are provided on the outer circumference of the mill cylinder (1). 3. Mill according to claim 1, in which the race rings (2, 3) have a T-shaped cross section consisting of race ring web ( ²¹ ) and race ring bandage ( ²¹¹ ), characterized in that the flanges (2c, 2d) of the race ring parts (2a, 2b) are provided on the outside of the race ring web (21) facing away from the mill cylinder ( ¹ ) and the inside of the race ring bandage ( ²¹¹ ). 4. Mill according to claim 1, characterized in that the mill cylinder sections (la, 1b) are each welded to the raceway sections (2a, 2b, 3a, 3b) lying in axial extension thereto. 5. Mill according to claim 1, characterized in that the inner diameter (D) of the mill cylinder (1) and the inner diameter (D ¹ ) of the race ring bandage (2 ¹¹ ) are at least approximately equal.