DK2802418T3

DK2802418T3 - Machine frame for a high-pressure roller press

Info

Publication number: DK2802418T3
Application number: DK13700089.9T
Authority: DK
Inventors: Meinhard Frangenberg
Original assignee: Khd Humboldt Wedag Gmbh
Priority date: 2012-01-12
Filing date: 2013-01-09
Publication date: 2016-04-11
Also published as: DE102012000423A1; CN103987461A; DE102012000423B4; EP2802418A1; EP2802418B1; CN103987461B; WO2013104646A1

Description

The invention relates to a machine frame for a high-pressure roller press, which has to be opened for dismounting.

High-pressure roller presses for the comminution of material to be ground were first disclosed by Schonert et al. in the German unexamined and first patent publication document DE2708053A1. High-pressure roller presses comminute material to be ground between two counter-rotating rollers which display no slippage, in that the material to be ground is drawn into a tight roller gap between the two rollers. There, the material to be ground breaks up without any energyconsuming comminution by way of shearing, but exclusively by way of compressive loading. Despite the absence of a shearing effect, the rollers employed in the high-pressure roller presses are subject to very high wear, which is why the rollers have to be regularly reworked or replaced. In order to facilitate dismounting of the high-pressure roller press when removing the rollers, DE 10 2005 045 273 Al proposed designing the machine frame in a manner that it is easy to open and in which the rollers can be pushed out of the machine frame via bearing brackets which are arranged in a sliding manner in the machine frame. In this design it is necessary to provide a bridging frame, transverse to the machine frame, so that, after removal of the rollers, the belts of the machine frame, along with their bearings which are arranged in a sliding manner, do not sag or begin to mechanically oscillate and are potentially damaged in this manner. The belts are thus stabilized by the bridging frame.

This construction, which is successful per se, has the disadvantage that the bridging frame has a high space requirement and, during operation of the high-pressure roller press, has almost no function.

It is, therefore, an object of the invention to propose a machine frame for a high-pressure roller press, for which the bridging frame is dispensable. The object according to the invention is achieved by a machine frame as per Claim 1. Further advantageous embodiments are stated in the dependent claims .

It is proposed according to the invention that belts lying opposite one another in the machine frame are interconnected by a side wall. The side wall thus fulfills a plurality of functions. On the one hand, the side wall serves as a visual cover panel, but also as a protection against material to be ground which escapes from the grinding chamber at the sides and which, in the rough conditions in which the high-pressure roller press is employed, could damage the adjoining bearings. Apart from its visual function and the protection of the machine, the side wall, however, also has the advantageous effect that the belts in the machine frame are stabilized by the side wall. In this manner, the belts do not start to mechanically oscillate, on account of which cracks could be created at points having a high buckling load. Furthermore, the belts cannot break, even in the event of high weights bearing on them, and in this manner render the high-pressure roller press unserviceable. The side wall thus fulfills a supporting function and turns the machine frame into a self-supporting chassis for the grinding rollers.

The side wall is advantageously configured so as to be approximately U-shaped, and the open throat of the U-shape points in the direction of the machine-frame opening. On account of this mode of construction, the side wall encloses the bearings, wherein the shafts of the grinding roller protrude from the side wall. On account thereof, the shaft can be connected, through the side wall, to a drive transmission.

Since high-pressure rollers, on account of the grinding rollers alone, have a very high weight, one strives to keep the weight of the high-pressure roller presses as low as possible. The lower weight facilitates the logistics of the high-pressure roller presses, since, as a rule, they tend to be in inaccessible or at least poorly accessible spots, for example in mines. In order to reduce the total weight of the high-pressure roller press, it is provided for the side wall to be constructed in a lightweight mode of construction, wherein individual spars stiffen the side wall. The side wall thus is composed of a comparatively thin sheet metal which alone is not in a position to withstand the forces acting thereon on account of an unsupported belt assembly after dismounting of the high-pressure roller press. It is the spars which impart ruggedness to the side wall.

In order to design the individual sub-components of the machine frame in an easy manner, it is provided for all belts and sub-components, to the extent that they need not be releasably connected to one another for dismounting, to be welded to one another. On account thereof, screw holes or rivet holes can be avoided in the belts and sub-components. In turn, with screw holes and rivet holes being absent, the material thickness can be reduced, since no holes which weaken the ruggedness of the machine frame are present. In as far as the sub-components are screwed to one another, the material thickness would have to be adapted in order to prevent fracture points.

The invention will be explained in more detail by means of the figures. In the drawings:

Fig. 1 is a high-pressure roller press having a machine frame according to the invention,

Fig. 2 is a machine frame according to the invention, in a partial view,

Fig. 3 is an isolated side view.

In fig. 1, a high-pressure roller press 100 which has a machine frame 110 according to the invention is illustrated. Received in the machine frame 110 are bearing brackets 111, 112, 113 and (not visible) 114, which slide on consoles, of which only the front console 115 is visible in this view. Corresponding bearings, which rotatably bear the shafts 120 and 130 of the grinding rollers 121 and 131, are received in the bearing brackets.

In order to remove the grinding rollers 121 and 131 from the machine frame 110, it is provided in this design for a cover 140 to be lifted from the machine frame 110, in order to open the machine frame on its side which points from the paper plane toward the rear. The grinding rollers 121 and 131, together with their bearings and the bearing brackets 111, 112, 113 and 114, are then pushed out of the machine frame to the rear, in relation to the paper plane. After dismounting of the grinding rollers, the sub-components or belt assemblies 150 and 151 remain behind and form an open throat. In order for the machine frame not to be deformed under its own load or to mechanically oscillate, it is provided according to the invention that a side wall 160 reciprocally supports the two belt assemblies 150 on the upper side and the belt assembly 151 on the lower side.

In order for the side wall to be better identifiable, the machine frame 110 in Fig. 2 is illustrated in a perspective view and when cut open. The side wall 160, which protects the belt assemblies 150 and 151 from being damaged under their own load or from mechanically oscillating, on account of which the machine frame could break at points having a strong buckling load, can be seen clearly between the rear parts of the upper belt assembly 150 and the lower belt assembly 151.

The side wall 160 is made from such a thin sheet metal that it alone would not be in a position to absorb the forces which would act on the sheet metal after dismounting the grinding rollers. Therefore, the side wall is reinforced with spars 161. The side wall 160 itself is not flat, but has a three-dimensional structure, such that it is constructed in a manner that is as resistant to warping as possible. On account of the extremely lightweight mode of construction, the machine frame 110 is, in comparison with conventional machine frames, significantly lighter, such that it can be transported more easily.

In order for the structure of the side wall 160 to be more easily identifiable, it is shown in an isolated manner in fig. 3. It can be clearly seen that the side wall 160, on account of its U-shape, has an open throat 165 which is introduced into the side wall 160 for receiving the shafts 120 and 130 which protrude from the machine frame. The side wall has a three-dimensional structure which is imparted by the shaping of the side wall itself and by the spars 161. This three-dimensional structure imparts the side wall so much resistance to warping that it can absorb the forces of the belt assemblies 150 and 151 without being deformed itself in the process. On account thereof, a bridging construction, which is to support and stabilize the belt assemblies 150 and 151 after removal of the grinding rollers 121 and 131 together with the shafts 120 and 130 and the four bearing brackets 111, 112, 113 and 114, can be avoided.

List of reference signs 100 High-pressure roller press 110 Machine frame 111 Bearing bracket 112 Bearing bracket 113 Bearing bracket 114 Bearing bracket 115 Console 120 Shaft 121 Grinding roller 130 Shaft 131 Grinding roller 140 Cover 150 Belt assembly 151 Belt assembly 160 Side wall 161 Spars 165 Throat

Claims

Machine frame (110) for a high pressure roller press (100) which can be opened for disassembly, characterized in that opposing flange structures (150, 151) in the machine frame (110) are connected by a side wall (160).

Machine frame according to claim 1, characterized in that the side wall (160) is formed approximately U-shaped and the open gap (165) of the U-shape points in the direction of the opening of the machine frame.

Machine frame according to one of Claims 1 to 2, characterized in that the side wall (160) is constructed in a lightweight construction, with separate rails (161) supporting the side wall (160).

Machine frame according to one of claims 1 to 3, characterized in that the side wall (160) is welded or screwed together with the machine frame (161).

Machine frame according to one of Claims 1 to 4, characterized in that the side wall (160) has a three-dimensional structure.