High-pressure roller press with side wall arrangement

Abstract

High-pressure roller press (100) for crushing brittle material (M), comprising - at least one loose roller as a grinding roller (110) which is supported on both sides in cylindrical roller bearings (101, 103), wherein the cylindrical roller bearings (101, 103) are each received in a bearing block (105, 108) which are arranged slidably on a slide track (112, 113) in a machine frame (115), - another grinding roller (111), and - each a side wall arrangement (120, 121) which axially closes a roller gap (W) between two opposing grinding rollers (110, 111) rotating in opposite directions at both ends (E1, E2) of the roller gap (W), wherein each side wall arrangement (120, 121) is formed in multiple parts, wherein - a first section (125) of which each side wall arrangement (120, 121) is connected to a corresponding bearing block (105, 108) of a first grinding roller (110), and - a second section (126) which is connected to a side wall arrangement (120, 121) with a corresponding bearing block (106, 107) of a second grinding roller (111), wherein the two sections (125, 126) of each side wall arrangement (120, 121) form a gap (S) between them, and wherein a third section (127) of each side wall arrangement (120, 121) is connected to the machine frame (115) and This third section (127) rests on the gap (S) between the first section (125) and the second section (126) via a pressure arrangement (130).

Description

[0001] The invention relates to a high-pressure roller press for crushing brittle material, comprising at least one loose roller as a grinding roller, which is supported on both sides in cylindrical roller bearings, wherein the cylindrical roller bearings are each received in a bearing block which is slidably arranged on a sliding track in a machine frame, a further grinding roller, and each a side wall arrangement which axially closes a roller gap between two opposing grinding rollers rotating in opposite directions at both ends of the roller gap.

[0002] The high-pressure comminution process according to Schönert, as first described in German patent application DE 27 08 053 ​​A1, involves drawing brittle material through a roller gap between two counter-rotating grinding rollers. Under very high pressure exceeding 50 MPa, the material is shattered into minute fragments. This comminution differs from mere breaking due to the absence of shearing forces. Within the roller gap, the material bursting under the high pressure behaves similarly to a viscous liquid, which can be distinguished by its consistency and flow behavior as a compaction zone of material lying on top. This compaction zone, which can be considered a liquid, tends to escape the pressure in the roller gap and therefore flows towards the axial ends of the gap, where the flowing material can escape the pressure.This flow is undesirable not only because the material being ground should fall downwards out of the roller gap and not exit the high-pressure roller press axially towards the ends of the roller gap, but also because this flow reduces the pressure in the roller gap in an undesirable way. To prevent the flow to the sides of the high-pressure roller press, specifically to the axial ends of the roller gap, it is known to close off both ends of the roller gap with a side wall. Since the two grinding rollers run against each other in the roller gap, the side wall located there is subject to constant movement. The grinding rollers slide past the side wall.

[0003] The two grinding rolls in a high-pressure roller press are not rigidly arranged, so the roll gap between them is not constant. Typically, a high-pressure roller press has one fixed grinding roll, while the other is a movable, floating roll that can increase or decrease the roll gap through its own movement. This ability to move is important for maintaining a constant roll gap pressure. If the two grinding rolls were fixed, even a slight overload of material in the roll gap could cause them to jam. The floating roll can also deflect larger fragments of material.In addition to high-pressure roller presses with only one loose roller, it is also known to provide two loose rollers, which are always returned to their starting position by means of a centering device in order to form a stable roller gap together with the second loose roller. However, the previously described, desirable mobility of the loose roller means that the side wall sealing the end of the roller gap must accommodate a variable position of the grinding rollers. The different positions of a grinding roller do not allow for a uniform seal. Consequently, depending on the relative roller position, material being ground can flow out of the axial ends of the roller gap.

[0004] German utility model DE 20 2009 014 656 U1 discloses a multi-part side wall assembly consisting of a mounting device, a rocker arm, and a side wall. This assembly serves to laterally limit the roll gap of a roller press with two counter-rotating rolls and an intermediate roll gap. It is also disclosed that the sections of the side wall assembly form a gap between them and are connected to the machine frame.

[0005] German patent application DE 10 2021 103 889 A1 discloses a high-pressure roller press for crushing brittle material, which has two rollers arranged side by side and rotating in opposite directions. These rollers form a gap between them. It is also disclosed that a multi-part side wall assembly is present at each end of the gap.

[0006] German patent application DE10 2021 103 573 A1 also discloses a high-pressure roller press with a roller gap and limiting plates located between two press rollers. These are attached to the roller end faces on the press frame and are subjected to force by means of spring devices.

[0007] The object of the invention is to provide a high-pressure roller press with a side wall which, even in the case of roller misalignment, exhibits an improved sealing effect compared to known side wall arrangements and a more uniform sealing effect in the case of different roller positions.

[0008] The problem according to the invention is solved with a high-pressure roller press according to claim 1. Further advantageous embodiments are specified in the dependent claims to claim 1.

[0009] According to the invention, each side wall is designed in multiple parts, wherein a first part of each side wall is connected to a corresponding bearing block of a first grinding roller, and a second part of each side wall is connected to a corresponding bearing block of a second grinding roller, with the two parts of each side wall forming a gap between them, and wherein a third part of each side wall is connected to the machine frame and rests on the gap between the first and second parts via a pressure arrangement. This arrangement is possible because the cylindrical roller bearing allows only axial movement to the bearing blocks that receive it. The first and second parts of the side wall are thus almost stationary with respect to the grinding roller, which, if designed as a loose roller, can move together with its bearing block.Only a third section, which is pressed onto the two previously mentioned sections, namely the first section and the second section, from the outside, seals a gap between the first section and the second section.

[0010] To improve the sealing effect, the third section can be designed with sealing beads on its sides, which seal any gaps between the first and third sections, as well as between the second and third sections. These sealing beads can be made of hard rubber. Alternatively, or in combination, the first and / or the second section can each have a sealing bead, which seals any gaps between the first and third sections, or between the second and third sections. The sealing beads can therefore be located on the third section, or on the first and second sections.

[0011] The pressure arrangement can act directly on the third section or on the ends of the first section and / or the second section facing the gap between the sections.

[0012] To improve the sealing effect, it may be provided that the first section or the second section is articulated to the third section via a hinge.

[0013] The invention is explained in more detail with reference to the following figures. They show: Fig. 1 A sketched, side view of a high-pressure roller press with a partially openwork machine frame, Fig. 2 a sketched view of the grinding rollers of the high-pressure roller press Fig. 1 from the top, Fig. 3.1 a first embodiment of the side wall of the high-pressure roller press according to the invention, Fig. 3.2 the side wall made of Fig. 3 in a perspective view, Fig. 4 the sketched view from Fig. 2 with a marked misalignment of a loose roller, Fig. 5 a further embodiment of the side wall arrangement of the high-pressure roller press according to the invention.

[0014] In Fig. Figure 1 shows a sketched, side view of a high-pressure roller press 100 with a partially openwork machine frame 115. The high-pressure roller press 100 shown here is used for crushing brittle material M, which is placed as bulk material on top of the roller cleat W ( Fig. 2) rests as loose bulk material and is drawn through the roller gap W by the rotation of the grinding rollers 110 and 111. In the high-pressure roller press 100, at least one grinding roller 110 is designed as a loose roller to maintain a uniform pressure in the roller gap W. The loose roller is supported on both sides in cylindrical roller bearings 101 and 103. The support of the grinding rollers 110 and 111 in cylindrical roller bearings 101, 102 and 103, 104 results in the plane of the bearing blocks 105, 106, 107, 108, which accommodate the cylindrical roller bearings 101, 102 and 103, 104, remaining perpendicular to the grinding roller axis. Furthermore, the bearing blocks 105 and 108 of the grinding roller 110 are arranged as loose rollers, each slidably on a slide track 112, 113 in the machine frame 115. To allow the loose roller, grinding roller 110, to move, the bearing blocks 105 and 108 slide on the slide tracks 112 and 113 into different positions.

[0015] In Fig. Figure 2 is a sketched view of the grinding rollers 110, 111 of the high-pressure roller press 100. Fig. Figure 1 shows the top view. The high-pressure roller press 100 has a side wall arrangement 120, 121 on each side of the roller gap W, namely at both ends E1, E2 of the roller gap W, which axially closes the roller gap W between two opposing grinding rollers 110, 111 rotating in opposite directions. According to the concept of the high-pressure roller press according to the invention, each side wall arrangement 120, 121 is designed in multiple parts. A first section 125 of each side wall arrangement 120, 121 is connected to a corresponding bearing block 106 or 108 of a first grinding roller 110, 111. A second section 126 of each side wall arrangement 120, 121 is connected to a corresponding bearing block 105, 107 of a second grinding roller 110, 111. These two sections do not change their vertical orientation relative to their associated grinding roller axis.The two sections 125, 126 of each side wall assembly 120, 121 are arranged such that they form a gap S between them. A third section 127 of each side wall assembly 120, 121 is connected to the machine frame 115. This third section 127 is pressed onto the gap S between the first section 125 and the second section 126 by means of a pressure arrangement 130, 130', for example in the form of a spring or a hydraulic system.

[0016] Here, the side wall assemblies 120, 121, depicted as bold lines, are shown to consist of various sections 125 and 126. With the aid of a pressure arrangement 130, 130', for example in the form of a spring or a hydraulic system, the third section 127 of the side wall assemblies 120, 121 is pressed onto the gap S between two corresponding sections 125, 126, so that the side wall assembly 120, 121 is completely sealed.

[0017] Fig. Figure 3.1 represents a first embodiment of the side wall arrangement 120, 121 of the high-pressure roller press 100 according to the invention. This side wall arrangement 120, 121 consists of a first section 125 and a second section 126, which together form a gap S. This gap S is closed by a third section 127, which is pressed onto the gap S from the outside by a pressure arrangement 130. Sealing beads 131 and 132 are provided to seal the gap S. The sealing beads 131 and 132 can, for example, be made of hard rubber.

[0018] In Fig. 3.2 shows the side wall arrangement 120, 121 from Fig. 3.1 in a perspective view. This figure shows that the third section 127 with the sealing beads 131 and 132 rests on the two sections 125 and 126 and thus seals the gap S.

[0019] In Fig. 4 is the sketched view from Fig. Figure 2 shows the misalignment of a grinding roller 110 as a loose roller. This misalignment can occur when a larger piece of material M passes through the roller gap W on one side. This changes the relative position of the two sections 125 and 126 of the side wall assemblies 120, 121, with the third section 127 sealing the changed relative position of the sections 125 and 126.

[0020] In Fig.Figure 5 shows a further embodiment of the side wall arrangement 120', 121' of the high-pressure roller press 100 according to the invention. In this embodiment of the side wall arrangement 120', 121', a first section 125' is pivotally connected to the third section 127' via a hinge 140. The hinge 140 improves the sealing of the gap S. To compensate for misalignment of a grinding roller 110 acting as a loose roller, the third section 127' rests against the second section 126' by means of a pressure arrangement 130 (not shown here) such that the gap S is sealed. REFERENCE MARK LIST 100 high-pressure roller press 101 Cylindrical roller bearings 102 cylindrical roller bearings 103 cylindrical roller bearings 104 cylindrical roller bearings 105 Bearing block 106 Bearing block 107 Bearing block 108 Bearing block 110 grinding roller 111 Grinding roller 112 Slide 113 Slide 115 machine frames 120 side wall arrangement 120' side wall arrangement 121 Side wall arrangement 121' Side wall arrangement 125 first section 125' first section 126 second section 126' second section 127 third section 127' third section 130 pressure arrangement 130' pressure arrangement 131 Sealing bead 132 Sealing bead 133 Sealing bead 140 hinge E1 End E2 End M Ground material S gap W roller gap

Claims

[1] High-pressure roller press (100) for crushing brittle material (M), comprising - at least one loose roller as a grinding roller (110) which is supported on both sides in cylindrical roller bearings (101, 103), wherein the cylindrical roller bearings (101, 103) are each received in a bearing block (105, 108) which are arranged slidably on a slide track (112, 113) in a machine frame (115), - another grinding roller (111), and - each a side wall arrangement (120, 121) which axially closes a roller gap (W) between two opposing grinding rollers (110, 111) rotating in opposite directions at both ends (E1, E2) of the roller gap (W), wherein each side wall arrangement (120, 121) is formed in multiple parts, wherein - a first section (125) of which each side wall arrangement (120, 121) is connected to a corresponding bearing block (105, 108) of a first grinding roller (110), and - a second section (126) which is connected to a side wall arrangement (120, 121) with a corresponding bearing block (106, 107) of a second grinding roller (111), wherein the two sections (125, 126) of each side wall arrangement (120, 121) form a gap (S) between them, and wherein a third section (127) of each side wall arrangement (120, 121) is connected to the machine frame (115) and This third section (127) rests on the gap (S) between the first section (125) and the second section (126) via a pressure arrangement (130). [2] High-pressure roller press according to claim 1, characterized by , that the third section (127) has sealing beads (131, 132) on the sides, which form a gap (S) - between the first section (125) and the third section (127) as well as - between the second section (126) and the third section (127) is written. [3] High-pressure roller press according to claim 1, characterized by , that the first section (125) and / or the second section (126) each have a sealing bead which creates a gap (S) - between the first section (125) and the third section (127) respectively - between the second section (126) and the third section (127) is written. [4] High-pressure roller press according to one of claims 1 to 3, characterized by , that the pressure arrangement (130) acts on the ends of the first part (125) and / or the second part (126) facing the gap (S) between the parts (125, 126). [5] High-pressure roller press according to claim 1, characterized by , that the first section (125) or the second section (126) is connected to the third section (127) by means of a hinge (140).

Images