Machine frame for a roll press

Abstract

A machine frame (1) for a roll press. This machine frame has an axial frame (2) for absorbing axial forces developing due to the operation and at least two radial frames (3) for absorbing radial forces developing due to the operation. The elements (36) of the radial frame (3), which absorb the radial forces, are mounted elastically in the machine frame (1).

Claims

1. A roll press comprising: two rolls; an axial frame for absorbing axial forces developing due to operation of the two rolls; and at least two radial frames configured for absorbing radial forces developing between the two rolls due to operation, the radial frames mutually intersecting with the axial frame, the radial frames comprising frame elements for absorbing the radial forces developing between the two rolls due to operation and are mounted elastically relative to the axial frame, the radial frame having long sides comprising a chord system having at least one of an upper chord and a lower chord, short sides of the radial frame have a force transmitting connection to the chords of the chord system via vertical spars, the chords of the chord system being mounted elastically.

2. A roll press in accordance with claim 1, wherein the axial frame comprises an axial frame upper part and an axial frame lower part.

3. A roll press in accordance with claim 2, further comprising a sliding means for the sliding motion of the two rolls.

4. A roll press in accordance with claim 3, wherein the sliding means for the sliding motion of the two rolls comprise support plates with sliding rails arranged at the axial frame and extending parallel to the radial frame, wherein sliding and guide elements are configured to be fastened to the two rolls during operation to form a system configured for displaceably guiding the two rolls.

5. A roll press in accordance with claim 1, wherein the vertical spars form spar pairs and at least one of the two vertical spar pairs of the radial frame is detachable.

6. A roll press in accordance with claim 1, wherein one of the two rolls is a moveable roll and another one of the two rolls is fixed roll, one of the two vertical spars of a radial frame has a contact surface for the movable roll and the other has a contact surface for the fixed roll.

7. A roll press in accordance with claim 1, further comprising a foundation plate wherein the foundation plate supports the axial and radial frames.

8. A roll press in accordance with claim 1, further comprising screw or centering pin connections wherein the axial frame and the radial frames are connected by the screw or centering pin connections.

9. A roll press in accordance with claim 1, wherein the axial frame is larger than the radial frames and the radial frames are located within the axial frame.

10. A roll press comprising: two rolls; an axial frame for absorbing axial forces developing due to operation of the two rolls; and a first radial frame; and a second radial frame, the first radial frame and the second radial frame being connected to the axial frame and configured for absorbing radial forces developing due to operation of the two rolls, the first and second radial frames mutually intersecting with the axial frame, each of the first radial frame and the second radial frame comprising elastic damping elements which are configured for absorbing radial forces due to operation of the two rolls, each of the first radial frame and the second radial frame having long sides comprising a chord system having at least one of an upper chord and a lower chord, each of the first radial frame and the second radial frame having short sides defining a force transmitting connection to the chords of the chord system via vertical spars, the chords of the chord system being mounted elastically via the elastic damping elements.

11. A roll press in accordance with claim 10, wherein the axial frame comprises an axial frame upper part and an axial frame lower part.

12. A roll press in accordance with claim 11, further comprising a sliding means for the sliding motion of the two rolls.

13. A roll press in accordance with claim 12, wherein the sliding means for the sliding motion of the two rolls comprises support plates with sliding rails arranged at the axial frame and extending parallel to the radial frame, wherein sliding and guide elements are configured to be fastened to the two rolls during operation to form a system configured for displaceably guiding the two rolls.

14. A roll press in accordance with claim 10, wherein the vertical spars form spar pairs and at least one of the two vertical spar pairs of the radial frame is detachable.

15. A roll press in accordance with claim 10, wherein one of the two rolls is a moveable roll and another one of the two rolls is fixed roll, one of the two vertical spars of the radial frame has a contact surface for the movable roll and the other has a contact surface for the fixed roll.

16. A roll press in accordance with claim 10, wherein the axial frame is larger than the radial frames and the radial frames are located within the axial frame.

17. A roll press arrangement comprising: two rolls; an axial frame configured to absorb axial forces from said two rolls during operation; and a radial frame intersecting with said axial frame, said radial frame including a chord configured to radially connect said two rolls during operation, said chord being configured to be tensioned by radial forces from operation of said two rolls, said radial frame including an elastic damping element connecting said chord to said axial frame, said elastic damping element being configured to absorb longitudinal stretching of said chord relative to said axial frame.

18. A roll press arrangement in accordance with claim 17, wherein: the longitudinal stretching results from operation of said two rolls; said elastic damping element is configured to absorb longitudinal stretching of said chord relative to other parts of said radial frame.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) In the drawings:

(2) FIG. 1 is a perspective view of the design of a machine frame according to the present invention comprising individual frames, without the rolls;

(3) FIG. 2 is a perspective view showing one half of a machine frame according to the present invention, with rolls;

(4) FIG. 3 is a detail view of the lower chord system of a machine frame according to the present invention; and

(5) FIG. 4 is a side detail view of the fixed bearing side of the machine frame according to the present invention.

DESCRIPTION OF THE PREFERRED EMBODIMENTS

(6) Referring to the drawings, FIG. 1 shows the design of a machine frame 1 according to the present invention for a roll press. This machine frame 1 has an axial frame 2 with an axial frame upper part 21 and with an axial frame lower part 22. Two radial frames 3 are arranged at right angles thereto and within the axial frame 2. A foundation plate 4 is located under the axial frame lower part 22 near the floor. The radial frames have an upper chord system 32 each with an upper chord 321 configured as a double chord and a lower chord system 31 with a lower chord 311 configured as a double chord. The upper and lower chord systems are of identical design. The short sides of the radial frames 3 form vertical spars, which are arranged each as a vertical spar pair 33. Parallel to the chord systems 31, 32, support plates with sliding rails 23 are arranged at the axial frame upper part 21 and at the axial frame lower part 22. The rigid components of the outer guides 24 are likewise fastened to the axial frame upper part 21 and to the axial frame lower part 22. The housing 6 of the rolls, which prevents material being subjected to size reduction from entering the outside from the roll gap during the operation, is indicated at the axial frame lower part 22. The upper chord system 32 is connected to the axial frame upper part 21 and the lower chord system 31 to the axial frame lower part 22 via screw connections (mounting holes are indicated) as well as via a centering pin 81 each (at the radial frame, hidden at the bottom) with an opposing hole 82 (at the axial frame, hidden at the top).

(7) FIG. 2 shows a view of one half of a machine frame 1 according to the present invention. Shown are one half of the axial frame 2 with the axial frame upper part 21 and of the axial frame lower part 22 as well as a radial frame 3, comprising the lower chord system 31 with the lower chord 311, the upper chord system 32 with the upper chord 321 and two vertical spar pairs 33. A chord system 31, 32 comprises chords 311, 321, which are configured as double chords extending parallel here, and box frame-like brackets, which have longitudinal beam elements 37. The individual spars each of a vertical spar pair 33 mesh with the spaces between the chords 311, 321 and the longitudinal beam elements 37. The chords 311, 321 have special welded constructions or forged head connections 38 at the respective ends. The chords are mounted in elastic damping elements 36 in the chord system. The fixed roll and the movable roll of a roll press usually have a fixed bearing and a movable bearing each. Shown is the fixed bearing-side view of the machine frame with the fixed bearing 51 of the movable roll and with the fixed bearing 52 of the fixed roll 5, each with bearing housings. Both rolls are supported horizontally in the radial frame 3. The contact surface for the movable roll bearing 51 can be seen in the form of a rubber thrust bearing with hydraulic cylinder 34, which is fastened to the vertical spar pair 33. The fixed roller-side contact surface in the form of a rubber thrust bearing is hidden in the figure. Within the framework of a force regulation, the hydraulic elements on the movable roll side set the gap size between the movable roll and the fixed roll during the operation (operating gap). Slideways 25, which direct the weight of a roll around the chord systems 31, 32 into the axial frame lower part 22, are arranged at the housings of the fixed bearings. Chambered sliding plates 251, made preferably of Teflon, are arranged at the slideways 25 at the top and at the bottom (see FIG. 4). Support plates with sliding rails 23, made preferably of polished chromium sheets, are fastened as an opposing sliding surface on the axial frame upper part 21 and on the axial frame lower part 22. The outer guide 24 has both rigid elements 241, fastened to the axial frame upper part 21 or lower part 22, as well as movable elements 242 fastened to the slideways 25 (see FIG. 4), so that the horizontal motion and oblique position of the movable roll are made possible. The outer guides 24 hold the rolls axially in position and direct the axial forces into the axial frame 2. The outer guides 24 are likewise preferably equipped with the Teflon/polished chromium sheet sliding pair.

(8) FIG. 3 shows a detail view of the lower chord system 31 of a machine frame 1 according to the present invention, comprising the lower chords 311, which are connected by means of the welded construction 38 (head connection) and are configured a double chords extending in parallel, and the longitudinal beam elements 37 as a bracket of the chords 311. The longitudinal beam elements 37 are connected to the axial frame lower part 22 via screw connections (mounting holes 39) and a centering pin 81 with opposing hole 82 (see FIG. 1). The two individual spars of the vertical spar pair 33 are inserted between the chords 311 and the longitudinal beam elements 37. The vertical spar pair 33 absorbs the radial operating forces and transmits them to the chords 311. The chord heads with the force application surfaces 331 for introducing the radial forces from the vertical spars 33 into the chords 311 have no screw or pin connections. The chords 311 are mounted elastically in the chord system 31 via a damping element 36. As a result, the radial operating forces are not transmitted to the longitudinal beam elements 37 and hence neither to the axial frame lower part 22.

(9) FIG. 4 shows a side view of the fixed bearing side of a machine frame 1 according to the present invention to illustrate the design of the roll mount in the machine frame 1, by which the axial forces are advantageously introduced only into the axial frame 2. Shown is a portion of a roll, here the fixed roll 5, a portion of the axial frame upper part 21 and of the axial frame lower part 22 as well as the lower chord system 31, the upper chord system 32 and a vertical spar pair 33 of the fixed bearing-side radial frame. Slideways 25, which have chambered sliding plates 251, preferably ones made of Teflon, at their upper and lower ends, are arranged at the bearing housing of the fixed bearing 52. The sliding plates 251 located outside, which are parts subject to wear, can be advantageously replaced without mounted rolls having to the removed from the frame. Support plates with sliding rails 23, preferably polished chromium sheets, are arranged as opposing sliding pieces at the axial frame upper part 21 and lower part 22, preferably by tack welds and/or screws. The rigid components 241 of the outer guides 24 are fastened to the axial frame upper part 21 and lower part 22. The movable components 242 of the outer guides 24 are arranged at the slideways 25. The slideways 25 are likewise used, connected to a traverse, not shown, as stop means for transporting and lifting the rolls.

(10) While specific embodiments of the invention have been shown and described in detail to illustrate the application of the principles of the invention, it will be understood that the invention may be embodied otherwise without departing from such principles.

LIST OF REFERENCE NUMBERS

(11) 1 Machine frame 2 Axial frame 21 Axial frame upper part 22 Axial frame lower part 23 Support plate with sliding rail 24 Outer guide 241 Rigid outer guide components 242 Movable outer guide components 25 Slideway 251 Sliding plate 3 Radial frame 31 Lower chord system 311 Lower chord 32 Upper chord system 321 Upper chord 33 Vertical spar pair 331 Contact surface of vertical spars 34 Hydraulic cylinder with rubber thrust bearing, as a contact surface of the movable roll 36 Elastic damping element 37 Longitudinal beam element of the chord system 38 Head connection 39 Mounting holes 4 Foundation plate 5 Fixed roll 51 Fixed bearing of movable roll 52 Fixed bearing of fixed roll 6 Housing (indicated) 81 Centering pin 82 Hole for centering pin