FI82126B - Edge joint for a stone roll - Google Patents

Description

82126 1 Stone roll end connection Sndfog för stenvals 5

The invention relates to an end connection of a design.

The stone rollers have a stone jacket part fitted between the end flanges for compression. Thus, the loads during driving are transferred from the stone-10 shell of the design through the end flanges to the axles of the design. It is essential that the loads are received specifically by flanges. In order to avoid harmful stresses, the casing part of the stone roll must not be carried on its inner casing surface in the event of a load and must therefore at no point adhere to the central passage axis of the roll so that substantial loads are transmitted through the point of contact. The problem with stone roll structures is the different magnitude of thermal expansion at different speeds of the metal end and the stone roll shell due to the difference in thermal expansion coefficients. The metal flange parts tend to expand and contract faster than the associated rocky roll shell. Thus, as the temperature 20 increases in the metal end flange of the fitting, it expands rapidly and the fitting associated with the metal end is unable to follow the expansion of the flange. This causes a tensile tension in the circumferential direction of the stone roll shell of the design, whereby there is a risk of the stone roll shell breaking.

The invention seeks to avoid the above-mentioned drawback and to form the design of the end joint in such a way that deformations caused by temperature do not cause stresses in the joint.

In the invention, it has been realized that the end joint is formed to be flexible in the radial direction 30 of the design but rigid in the circumferential direction.

The flexible end joint of the embodiment according to the invention is mainly characterized in that the end joint of the embodiment comprises a resilient structure between the end flange and the end surface of the rocky roll shell, the variable shape is adapted to accommodate The load forces 82126 1 can be reliably transmitted from the roll shell through the end flanges to the shafts of the design and further to the bearing points of the shafts.

g The invention will now be described with reference to the accompanying drawing, in which: Figure 1, to which the invention is not intended to be exclusively limited.

Figure 1 shows the embodiment in a cross-sectional view.

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Figure 2A shows a flexible end connection of an embodiment according to the invention in a side cross-sectional view.

Figure 2B is a section 1-1 of Figure 2A.

Figure 2C shows the lamellar structure in an axonometric schematic view and its operation.

Figure 3A is a cross-sectional view of a portion used in a flexible joint.

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Figure 3B shows another flexible cross-sectional view of the part used in the joint.

Figure 3C shows the use of a spacer between the end of the rocky roll shell and the lamellae of the end flange.

Fig. 3D shows the spacer as seen from the direction of the k in Fig. 3C and in a partial view.

Figure 3E shows a loose strip package 30 placed between the roll shell and the end flange.

Fig. 3F shows a solution corresponding to the embodiment of 3E and shows a cross-sectional shape of the strip structure.

Fig. 3G shows another preferred cross-sectional shape of the tape of the tape package of Fig. 3E.

3 82126 1 Figure 1 shows an embodiment. The stone roll 10 comprises a roll shell 11 made of aggregate. The roll shell 11 is pressed by screw arrangements 14 between the metal end flanges 12. The fastening means 14 preferably fasten the fastening screws to the threads 5 of the central shaft 13 and press the end flanges 12 against the end surfaces 11a of the roll shell 11 of the design.

Figure 2A shows a flexible connection between a stone roll shell 11 and a metal end flange 12 according to the invention. The end joint comprises a resilient structure 15 between the flange part 12 and the sheath part 11, which is adapted to bend as the metal expands and contracts as the radial temperature expansion of the roll.

As shown in Figure 2A, the resilient connecting structure comprises lamella portions 16 between the flange portion 12 and the stone mantle portion 11. The lamella portions 16 preferably protrude parallel to the Xj axis and preferably from the conical surface of the flange portion. The conicity is only 5-15 ° and is equivalent to the conicity of the end 11a of the design. The conicity is highlighted in the figure. It is also possible to use completely conical connection surfaces 20 perpendicular to the Xj axis.

Each circumferential radius 2 ... has a number of preferably similar lamella sections 16. Each lamella section has a height D, a width L and a thickness S (in Fig. 2C). The lamella height ratio thickness-25 tea D / S is in the range 1-10. The length L of the lamella is 1/4 to 1/30 of the entire circumferential dimension at the lamella.

As shown in Fig. 2B, there are a number of similar lamella portions 16 located on the circumferential circumferences Ri.Ra ... each. The side surfaces 16a and 16az of the lamella portions are curved and at least the surface 16aj is at a radial distance Ra from the central axis X of the flange and the surface 16ax is at a radial distance Ra from the central axis of the sheath Χ :, and correspondingly the surface 16a1 is at a radial distance Rb from the central axis Xx of the flange.

Fig. 2C shows the behavior of the lamella part in a resiliently adaptive joint as the temperature rises in the flange part 12. As shown in Fig. 2C, the flange part 12 expands radially. Since the thermal expansions of the flange portion 12 and the aggregate 11 are of different magnitudes and occur at different rates, and since the thermal expansion of the rocky shell portion j1 is slower than the flange portion 12, the flange portion 12 tends to cause tension in said rock roll 11. .with lamella parts 16.

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Fig. 2C shows, in broken lines, the step in which the metal flange part 12 has undergone a certain deformation due to a rise in temperature and in which the rocky jacket part 11 has not had time to obtain said deformation. Thereby, the base part 17 of the lamella part 16 moves to the new position determined by the temperature-10 expansion. Since the lamella part 16 is a flexible elongate part, it bends. This bent shape is shown in Figure 2C by dashed lines. Thus, the deformation caused by the temperature rise in the flange portion 12 does not cause substantial stresses in the rocky roll shell 11. Each lamella portion must be high enough D with respect to the thickness S of the lamella portion 15 to control bending, and in general possible.

However, using the lamellae 16, the joint is rigid tangentially.

This stiffness is ensured by a sufficient length L of each lamella part 16. Thus, the forces F due to the tangential load 20 cannot bend the lamellae in the tangential direction. The rigidity of the joint is thus maintained.

The lamellae shown in Figures 2A-2C are preferably formed by machining 25, preferably turning and milling them onto the surface of the metallic flange portion 12.

Figure 3A is a cross-sectional view of a lamellar structure. Each laraelli 16 is rectangular in cross section.

Figure 3B shows another more flexible lamellar cross-sectional structure.

The side surfaces 16a and 16a „of each lamella 16 are at an oblique angle to the central axis Y of the lamella 1 z. Each lamella part 16 is tapered at its lower end and is thus more flexible in radial bending. In addition, with the wide end portion 16b of each lamella, a more uniform surface-35 pressure is achieved against the end 11a of the flange portion 11 of the design.

Fig. 3C shows the use of a spacer 18 between the lamella parts 16 and the end 11a of the stone roll shell 11 of the design. The use of the spacer 18 equalizes the pressure caused by the ends of the lamellae against the stone.

Figure 3D shows a preferred embodiment of the spacer 18. To be flexible enough, the spacer includes notches 18a and 18b. The ends of the lamellae 16 contact the spacer 18 in the area between the notches 18a.

Figure 3E shows another flexible end connection structure. A loose strip pack 19 is arranged between the end flange 10 and the end 11a of the rocky shell part of the design. The strip pack is preferably arranged helically by twisting into the space 20 between the end flange 12 and the roll shell 11 for compression. In the structure of Fig. 3E, a friction joint C is formed both at the junction between the strip 19 and the flange 12 and at the junction between the strip 19 and the flange 11.

Figure 3F shows a tape shape of the tape of the tape package structure of Figure 3E. The strip 19 comprises notches 21 which allow the strip 19 of the strip package to rotate radially. However, the strip is tangentially sufficiently rigid.

Figure 3G shows another preferred embodiment of the tape 19 of the tape package. In an embodiment, the strip comprises notches 22 on both sides. Thus, this embodiment is more radially flexible than the strip structure of Figure 3F.

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Claims (11)

1 Patent claim 1. Connecting structure between the end flange (12) of a stone roller (10) and its roller sheath (11) of stone, in which connection construction g of the stone roller shaft (10) of stone is pressed between the end flanges (12) by means of fastening means (14). ), advantageously fastening screws, which fasteners are coupled to the central axis (13) of the rock roll (10) and the end flanges (12) are brought into contact with the end surfaces (11a) of the rock roll (11) of stone by the fastening means ( 14) and which advantageously consist of fastening screws, in which construction the shaft (13) carries the roller sheath (11) of stone by mediating the end flanges (12), characterized in that the end connection of the stone roller comprises a flexible structure (15) between the end flange (12) and the end surface (11a) of the roller sheath (11) of stone, whose variable shape Ί5 is adapted to adapt to changes due to the radial heat expansion of one side end flange then and on the other side the roller sheath made of stone, which construction is however rigid in the direction of the end flange's circumference, whereby the load forces can be reliably transferred from the roller sheath via the end flanges to the shaft of the stone roller and 2Q further to the shaft's storage points. 2. End joint for stone roll according to claim 1, characterized in that the connecting structure (15) comprises several slat parts (16), each slat part (16) having height (D), width (L) and thickness (S). , while the slat parts are located on circumferences (RltR2) with different radii from the central axis (X) of the roller, whereby the slat (16) bends radially after the thermal expansion of the end flange (12). End connection according to claim 2, characterized in that each lamella comprises side surfaces (16a1, 16a2) while the side surface (16aj) is located at the radial distance (16a) from the central axis (X2) of the end flange and the side surface (16a2). are similarly located at the same radial distance (Rb) from the central axis (Xj) of the flange. 35 4. End connection according to any of the preceding claims, characterized in that the D / S ratio between the height (D) of the slat (16) and the thickness (S) of the slat is in the range 1-10. 5. An end joint as claimed in any preceding claim, characterized in that the length (L) of the slat (16) is 1/4 - 1/30 of g the entire circumferential dimension of the slat. 6. End connection according to any of the preceding claims, characterized in that the root of the slat is thinner than the upper end, thereby promoting the bending of the slat and evening out the surface pressure caused by the ends (16b) of the slab towards the end surface. (11a) of the rock roll roller sheath (11). 7. End connection according to any of the preceding claims, characterized in that the end connection comprises such a slat structure which is advantageously manufactured by machining the end flange (12). 8. End connection as claimed in any preceding claim, characterized in that a separate flexible intermediate disc (18) is provided between the slat parts (16) and the end surface 20 (Ha) of the stone roll roller sheath in the direction of the radius. smoothes the surface pressure caused by the ends of the slats against the end surfaces (11a) of the rock roll's mantle. 25 End connection according to any of the preceding claims, characterized in that the connecting structure comprises a band (19) pressed between the end flange (12) and the end (11a) of the rock roll (11) of the stone roll. 30 End connection according to the preceding claim, characterized in that the band (19) is spirally wound in the space (20) between the end flange (12) and the end (11a) of the roller sheath (11). 11. End connection according to claim 9 or 10, characterized in that the strip (19) includes notches (21) which allow a radial oscillation of the strip due to the expansion of the end flange (12). 5 15 20 25 30 35 li