Solid drum wall type screw centrifuge

Abstract

The present invention relates to a transverse disk (60) for stabilizing a worm hub structure of a centrifuge worm (30). According to the present invention, at least one opening (70) is formed at least locally on at least 75% of all imaginary circular lines (71) from the center (M) to the periphery (72) of the transverse disk (60).

Description

Technical Field

[0001] The present invention relates to a transverse disk for a centrifuge worm for stabilizing the worm hub structure. Furthermore, the present invention also relates to a solid-wall scroll centrifuge having a centrifuge worm, wherein the centrifuge worm preferably at least partially comprises a worm hub formed by longitudinal rods. Background Art

[0002] A solid-wall scroll centrifuge is characterized by a drum having a closed or complete housing. The drum rotates at a high speed, whereby a multiphase mixture located in the drum can be separated into at least one heavy phase and at least one light phase. The heavy phase is usually a solid phase, which is conveyed out of the drum by a worm, namely a centrifuge worm. For this purpose, the worm is rotatably supported in the drum relative to the drum and has a worm thread structure. The worm thread structure is arranged around the worm hub.

[0003] The worm thread structure extends along the inner side or inner circumferential surface of the drum, thereby conveying the material of the heavy phase to the axial end region of the drum. At this end of the drum, the heavy-phase material is conveyed out, for example, from an output cone. That is to say, the multiphase mixture to be clarified is located between the inner side of the drum and the worm hub.

[0004] In a certain solid-wall scroll centrifuge, especially for reasons of clarification technology, a large pool depth is desired. However, at the same time, the pool depth is limited by the diameter of the worm hub and the buoyancy and sedimentation effects of the mixture or light phase to be clarified formed here.

[0005] The diameter of the worm hub cannot be reduced without limit, because the stiffness and stability of the centrifuge worm depend on the diameter of the worm hub.

[0006] It is known from the prior art that the worm hub is configured such that the worm hub is reduced in terms of the worm hub wall. Thus, notches can be formed between the respective worm hub walls.

[0007] However, it is necessary to configure such a worm hub structure with a transverse disk in order to stabilize the worm hub. Summary of the Invention

[0008] Starting from the prior art, the object of the present invention is to provide a transverse disk for a centrifuge worm for stabilizing the worm hub structure, which on the one hand sufficiently stabilizes the worm hub structure and on the other hand is configured such that the liquid, namely the centrifugate, can flow out unimpeded in a solid-wall scroll centrifuge. The transverse disk should be configured such that the stiffness of the transverse disk is not affected.

[0009] Furthermore, the object of the present invention is to provide an improved solid-wall scroll centrifuge, especially improving the solid-wall scroll centrifuge on the transverse disk.

[0010] The object is achieved by means of a transverse disk according to the invention and a solid drum wall screw centrifuge according to the invention. The dependent claims include at least suitable design solutions and improvements.

[0011] According to the invention, based on a transverse disk of a centrifuge worm for stabilizing the worm hub structure, at least one opening is formed at least partially on at least 75% of all imaginary circular lines from the center to the periphery of the transverse disk. The imaginary circular lines are all circular lines that can be formed in the radial extension between the center and the periphery of the transverse disk.

[0012] Preferably, in a theoretical or imaginary configuration, a distance of only 5 mm, in particular 2 mm, in particular 1 mm, in particular 0.5 mm is formed between the circular lines. When examining the circular lines in this way, the distance between the circular lines is preferably configured to be of the same size.

[0013] The transverse disk of the centrifuge worm can be a disk that is formed transversely to the longitudinal axis of the worm hub. The transverse disk is particularly used for stabilizing such a worm hub structure, which is based on, for example, a structure of a plurality of longitudinal rods. The transverse disk can also be referred to as a support disk.

[0014] In the direction from the center point towards the periphery of the transverse disk, the transverse disk has imaginary circular lines. Openings or sections of openings are formed at least partially on at least 75% (of the circular lines) of all imaginary circular lines.

[0015] In other words, at least one opening or at least one section of an opening is formed at least partially on the corresponding diameter in at least 75% of the total diameter range of the transverse disk. In other words, at least one opening or at least one section of an opening is formed at least partially on the corresponding diameter on at least 75% of all diameters of the transverse disk.

[0016] This solution of forming openings in most of the diameter range of the transverse disk enables the liquid or the centrifuged liquid to flow out well within the worm hub structure. At the same time, this transverse disk has sufficient stiffness, so that the transverse disk still achieves good stabilization of the worm hub structure.

[0017] In an embodiment of the invention, the diameter range defining the central opening of the transverse disk can in particular be configured to be without openings. This section without openings can be used to achieve additional stability of the transverse disk.

[0018] In a particularly preferred embodiment of the invention, openings or sections of openings are formed at least partially on all imaginary circular lines of the transverse disk. In other words, particularly preferably, over the entire diameter range of the transverse disk, at least one opening or at least one section of an opening is formed for each diameter.

[0019] The transverse disk can be configured such that liquid or centrifuged liquid can flow away across the entire diameter of the transverse disk.

[0020] The openings of the transverse disk are preferably configured such that these openings have different geometries and / or opening sizes and / or arrangement patterns.

[0021] The geometry of the opening refers to the shape of the opening. The transverse disk can have a plurality of openings with different geometries.

[0022] The opening size of the opening, in other words, relates to the opening area. Liquid can flow through and / or out through the opening size. The openings can have different sizes in terms of the opening size.

[0023] The arrangement pattern refers to the arrangement form of a plurality of openings. Here, at least two openings form an opening group, and a plurality of opening groups can be distributed on the transverse disk. In addition, the transverse disk can have a group of openings, and these openings form a plurality of openings evenly distributed on the transverse disk. A group of openings is preferably formed by a plurality of identically configured openings. Identical openings refer to openings having the same geometry and the same cross-sectional area.

[0024] In one embodiment of the present invention, the transverse disk has a plurality of openings that are configured as cam-shaped or oval-shaped or elliptical. Such openings are preferably arranged in pairs. A pair of such openings thus forms an opening group. A plurality of such opening groups can also be evenly arranged on the transverse disk.

[0025] A cam-shaped opening refers to an opening that substantially has the shape of a cam of a camshaft, especially the cross-sectional shape. Such an opening especially has the shape of a steep-faced cam. In other words, such an opening is formed by two circular arcs, and the centers of the circular arcs are located on the common mirror axis of the opening. The circular arcs are locally connected to each other by straight lines.

[0026] In addition, the openings can also be configured as oval-shaped or elliptical. In a particularly preferred embodiment of the present invention, every two such openings are arranged relative to each other such that they form an opening group.

[0027] In a particularly preferred embodiment of the present invention, six openings each are configured as cam-shaped or oval-shaped or elliptical, and every two openings form an opening group. The three opening groups thus formed are evenly arranged on the transverse disk in the circumferential direction.

[0028] In addition, the transverse disk according to the present invention can have a plurality of openings starting from the periphery of the transverse disk and configured as notches of the periphery of the transverse disk.

[0029] These notches are preferably configured as U-shaped.

[0030] Such notches, especially U-shaped notches, are preferably also arranged in pairs. In a particularly preferred embodiment, the transverse disk has six such notches, especially six such U-shaped notches. Two of said notches form an opening group. The three opening groups thus formed are arranged uniformly in the circumferential direction on the transverse disk. The opening groups formed by the U-shaped notches in the circumferential direction and the openings formed by the cam-shaped openings preferably alternate with each other.

[0031] The U-shaped notches preferably have such a length in the direction towards the center of the transverse disk that in the radial extension from the center to the periphery of the transverse disk, the U-shaped notches are at least partially located on the same circular line as the openings configured as cam-shaped.

[0032] In another embodiment of the present invention, the transverse disk has a plurality of openings configured as circular.

[0033] The openings configured as circular are preferably arranged in pairs. In other words, two circular openings form an opening group.

[0034] It is also preferably configured to have six openings configured as circular. Six such openings can form three opening groups with a circular shape. These opening groups are again arranged uniformly in the circumferential direction on the transverse disk.

[0035] In addition, the openings configured as circular can also be arranged as single openings, that is, not grouped as opening groups. In addition, the transverse disk can also have different embodiments of a plurality of openings configured as circular. For example, the first type of openings configured as circular can be arranged as opening groups. The second type of openings configured as circular can be arranged as single openings respectively.

[0036] In another preferred embodiment of the present invention, an opening group composed of circular openings and an opening group composed of U-shaped notches are respectively formed in the same circular section. At this time, the opening group with circular openings is formed inside, that is, formed inside in the direction towards the center.

[0037] In a preferred embodiment of the present invention, the transverse disk is composed of six circular sectors, wherein three circular sectors respectively have an opening group with cam-shaped openings, and three circular sectors respectively have an opening group formed by U-shaped notches and an opening group formed by circular openings. The circular sectors thus formed are respectively alternated.

[0038] Basically semi-circular notches can preferably be formed on the periphery of the transverse disk, and the notches are arranged evenly. The notches, especially the semi-circular notches, are used to accommodate the longitudinal rods mainly forming the worm hub structure.

[0039] In other words, the transverse disk preferably has preferably substantially semi-circular notches on its periphery, the number of which corresponds to the number of longitudinal rods, which in turn form the worm hub of a solid-drum screw centrifuge.

[0040] In one embodiment of the invention, twelve such semi-circular notches can be formed.

[0041] Furthermore, the transverse disk can have at least notches on its periphery, the number of which corresponds to the number of longitudinal rods forming the worm hub.

[0042] The number of preferably substantially semi-circular notches can be greater than the number of longitudinal rods. Thus, a transverse disk can be provided which can be used as a transverse disk for a plurality of differently configured worm hubs. In other words, it is not necessary for the transverse disk to have only preferably semi-circular notches, the number of which corresponds to the number of longitudinal rods. Instead, individual notches, for example every second semi-circular notch, can be configured as additional liquid channels.

[0043] Furthermore, an opening can be formed in the center of the transverse disk. The central opening can have a circular shape with additional further circular-arc-shaped notches, in particular three circular-arc-shaped notches. A circular-arc-shaped notch means a notch formed by a circular arc, where the circular arc is a partial surface of a circular surface delimited by an arc and a chord.

[0044] The circular-arc-shaped notches, in particular the three circular-arc-shaped notches, are preferably formed uniformly circumferentially around the circular shape of the thus formed central opening.

[0045] In another embodiment of the invention, the circular-arc-shaped notches, in particular the three circular-arc-shaped notches, can be arranged in the transverse disk such that groups of openings formed by two circular openings and the circular-arc-shaped notches of the central opening are alternately arranged circumferentially.

[0046] Preferably, three groups of openings each formed by two circular-shaped openings and three circular-arc-shaped notches are formed. It is preferably set that at least one imaginary circular line of the transverse disk intersects both the circular-arc-shaped notches and the groups of openings each consisting of two circular openings.

[0047] In another embodiment of the invention, the opening can also have a rhombic shape and / or a polygonal shape and / or a pointed-vault shape and / or a triangular or quadrilateral shape with at least partially curved sides.

[0048] The material of the transverse disk is formed between the respective openings of the transverse disk. The material is preferably made of metal.

[0049] In a possible embodiment of the present invention, the openings have such dimensions and are arranged relative to each other such that the material of the transverse disks is configured in a web-like manner. These webs can be configured straight and / or curved. When forming the webs, a particularly advantageous ratio of the opening dimensions to the material remaining of the transverse disks is achieved.

[0050] Another aspect of the present invention relates to a solid-wall scroll centrifuge having at least one transverse disk according to the present invention. The transverse disk according to the present invention is formed inside the worm hub.

[0051] A preferred sub-aspect of the present invention relates to a solid-wall scroll centrifuge with a centrifuge worm, the centrifuge worm at least partially including a worm hub formed by longitudinal rods. According to the present invention, at least one transverse disk according to the present invention is provided in the worm hub.

[0052] A plurality of transverse disks according to the present invention can be formed in the worm hub. In addition, the transverse disks provided in the worm hub can be configured differently. At least one of the formed transverse disks can be a transverse disk according to the present invention, and conversely, the other transverse disks have different configurations.

[0053] In a particularly preferred embodiment of the present invention, the transverse disks are configured to form an axial channel for the centrifugate generated in the solid-wall scroll centrifuge independently of the pool depth formed in the drum of the solid-wall scroll centrifuge.

[0054] In other words, by means of the solid-wall scroll centrifuge according to the present invention having transverse disks according to the present invention, the accumulation of solids in the drum can be effectively avoided, so that the solids do not block the openings or notches formed at the periphery of the transverse disks according to the standard.

[0055] Conversely, due to the configuration of the transverse disks according to the present invention, the liquid / centrifugate can flow out freely. According to the present invention, an axial channel for the liquid / centrifugate is achieved for any pool depth, and the centrifuge worm, especially the worm formed by longitudinal rods, does not lose stability.

[0056] The solid-wall scroll centrifuge according to the present invention can be a two-phase solid-wall scroll centrifuge or a three-phase solid-wall scroll centrifuge. BRIEF DESCRIPTION OF THE DRAWINGS

[0057] An embodiment of the solution according to the present invention will be described in detail below with reference to the schematic drawings.

[0058] Wherein:

[0059] Figure 1Shows a longitudinal sectional view of a solid-wall scroll centrifuge according to the invention, said solid-wall scroll centrifuge having at least one transverse disk according to the invention; and

[0060] Figure 2 Illustration showing a transverse disk according to the invention. Detailed Description

[0061] Below, the same reference numerals are used for identical and identically acting components.

[0062] Figure 1 There is shown a solid-wall scroll centrifuge 10 extending substantially along a horizontal longitudinal axis 12. The solid-wall scroll centrifuge 10 has a housing 14 in which a drum 16 is rotatably supported about the longitudinal axis 12. Since the drum 16 rotates at a high rotational speed, a centrifugal force can be generated in the drum, by means of which the material to be clarified can be separated into a heavy phase and a light phase. For this purpose, the drum 16 is supported on a first drum support 18 and a second drum support 20. The shown solid-wall scroll centrifuge 10 is a two-phase solid-wall scroll centrifuge. However, the transverse disk according to the invention can also be implemented in a three-phase solid-wall scroll centrifuge.

[0063] An inlet 22 for the material to be clarified, an outlet 24 for the heavy phase and an outlet 26 for the light phase are formed on the drum 16. In order to rotate the drum 16, a drive 28 is provided. The outlet 26 serves as an overflow opening for the light phase located radially inside in the drum, so that once a predetermined level, i.e. a so-called pond depth 52, is reached in the drum 16, the light phase automatically flows out at this outlet.

[0064] In order to be able to discharge the heavy phase located radially outside in the drum 16 from the drum 16, a centrifuge worm 30 is provided in the drum 16. The centrifuge worm 30 rotates relative to the drum 16 by means of the drive 28. Thereby, the material of the heavy phase is discharged radially inwards along a cone formed on the drum 16 and thus towards the outlet 24.

[0065] For this purpose, the centrifuge worm 30 is configured to have a worm hub 32 extending along the longitudinal axis 12, said worm hub being surrounded radially on the outside by a worm thread structure 34. That is to say, the worm hub 32 serves to support the worm thread structure 34 in the radial direction, to transfer the torque from the drive 28 to the worm thread structure 34 and in particular to withstand tensile and shear forces. The worm hub 32 is designed to have a grid structure 56 in a cylindrical longitudinal section 36.

[0066] The grid structure 56 is formed by twelve longitudinal rods 58 which are arranged on the periphery of the worm hub 32 at uniformly spaced intervals in their longitudinal direction, that is to say parallel to the longitudinal axis 12.

[0067] The preferred number of longitudinal rods 58 is between 8 and 16, especially between 10 and 14. The longitudinal rods 58 respectively form a fitting surface for the worm thread structure 34 on the outside in the radial direction and are supported on the transverse disk 60 on the inside in the radial direction. At this time, the longitudinal rods 58 extend beyond the transverse disk 60, and the transverse disk is oriented transversely with respect to the longitudinal axis 12, and thus forms an internal support structure for the longitudinal rods 58.

[0068] Between every two transverse disks 60, two to six inclined struts 64 extend.

[0069] In the conical longitudinal section 38, the worm hub 32 is configured to have a circumferential surface 44. The circumferential surface 44 is substantially closed and is formed especially by a metal plate or a tubular surface. The centrifuge worm 30 is rotatably mounted by a first worm support 40 and a second worm support 42.

[0070] The inlet area 48 is especially defined by an inlet pipe 46. The inlet pipe 46 is used to supply the material to be clarified in the center in the inlet area 48 into the interior of the worm hub 32. Due to the worm hub 32 formed by the longitudinal rods 58, the solid-wall screw centrifuge 10 has a relatively large pond depth 52.

[0071] In Figure 2 Fig. shows the transverse disk 60 according to the invention in an enlarged view.

[0072] It can be seen that a plurality of openings 70 are formed in the transverse disk 60. These openings 70 have different geometric shapes, cross-sections and arrangement patterns. The openings 70 are arranged such that they are configured geometrically and have such an opening size that at least one opening 70 or a section of the opening 70 is formed at least locally on at least 75% of all imaginary circular lines 71 from the center M of the transverse disk 60 to the periphery 72 of the transverse disk.

[0073] In other words, due to the formed openings 70, at any pond depth 52 existing in the solid-wall screw centrifuge 10, the transverse disk 60 enables the centrifugal separation liquid to pass axially. At the same time, the stability of the transverse disk 60 and thus also the stability of the worm hub 32 or the centrifuge worm 30 is not negatively affected.

[0074] First, an opening 70 / 80 formed at the center M of the transverse disk 60 can be seen. This opening 80 has a circular shape 81 with additional additional circular-arc-shaped notches 82. In the current case, three circular-arc-shaped notches 82 are formed. The circular-arc-shaped notches are evenly distributed on the circumference of the circular shape 81. In other words, the circular-arc-shaped notches 82 are respectively arranged at an angle of 120° with respect to each other.

[0075] Radially from the center M, there are also openings 70, which are configured as circular openings 73. These circular openings 73 have the smallest opening size compared to all other openings 70 of the transverse disk 60.

[0076] It can be seen that these circular openings 73 are arranged in pairs respectively. Every two circular openings 73 form an opening group 83. Here, six circular openings 73 are formed, and thus three opening groups 83 are formed.

[0077] The opening groups 83 are also evenly arranged on the transverse disk 60 along the arc direction. In other words, the opening groups 83 are also arranged at an angle of 120° relative to each other. It can be seen that the opening groups 83 are arranged relative to the central opening 80 such that an opening group 83 is arranged between two circular-arc-shaped notches 82 respectively. In other words, the opening groups 83 are also arranged at an angle of 120° relative to each other. It can be seen that on the exemplary round wire 71', the circular-arc-shaped notches 82 that form both the openings 73 and the openings 80 are locally formed.

[0078] Three additional circular openings 73' are formed. The diameter of these openings 73' is smaller than that of the circular openings 73. These three circular openings 73' are formed radially inside relative to the notches 90 respectively. In addition, the circular openings 73' are formed in the radial extension lines of the midpoints of the spacing between the circular openings 73 of the opening group 83.

[0079] In addition, there are openings 70 configured as cam-shaped on the transverse disk. These cam-shaped openings 74 are also arranged in pairs.

[0080] It can be seen that six cam-shaped openings 74 are formed. Here, a total of three opening groups 84 are formed for the cam-shaped openings 74. The cam-shaped openings 74 refer to such openings that have the shape of a cam of a camshaft in the top view of the opening 74. It can be seen that the shape of the opening 74 corresponds to the shape of a steep-face cam. In order to be able to form such cam-shaped openings 74, these openings have two circular arcs, namely a first circular arc 75 and a second circular arc 76. Here, the second circular arc 76 is larger than the first circular arc 75 and has a larger radius.

[0081] The two circular arcs 75 and 76 are connected to each other by a connecting line 77, thereby forming the cam shape of the opening 74. It can be seen that all the cam-shaped openings 74 are arranged such that the smaller circular arc or the smaller arc segment 75 always points in the direction of the periphery 72 of the transverse disk, while the second circular arc or the larger arc segment 76 always points inward in the direction of the center M.

[0082] The open groups 84 are arranged such that the open groups 84 and the open groups 83 are alternately arranged on the circumference U. As can be seen from the exemplary round wire 71”, both circular openings 73 and cam-shaped openings 74 are partly formed on this round wire 71”.

[0083] The transverse disk further has an opening 70 configured as a U-shaped notch 78. A total of six such U-shaped notches 78 are formed on the transverse disk 60.

[0084] Every two of said notches 78 are arranged in pairs and form an open group 88. Thus, a total of three open groups 88 are formed, and these open groups are also arranged evenly distributed on the transverse disk 60. These open groups 88 are respectively arranged at an angle of 120° relative to each other.

[0085] As can be seen from the exemplary round wires 71”' and 71*, both cam-shaped openings 74 and U-shaped notches 78 are at least partly formed on these round wires 71”' and 71*.

[0086] The transverse disk 60 further has notches 90 on the transverse disk periphery 72. These notches are basically configured as semi-circular. Said notches 90 are particularly used for receiving and fixing the longitudinal rods 58 of the worm hub 32. In the present case, twelve such notches 90 are formed. Thus, the worm hub 32 can be formed by twelve longitudinal rods 58. However, it is not necessary to accommodate a longitudinal rod in all the notches 90. In other words, when there are fewer than twelve longitudinal rods, for example, every other notch 90 can be empty.

[0087] The transverse disk 60 is formed by alternately arranged circular sectors 94 and 95.

[0088] The first circular sector 94 includes a circular arc-shaped notch 82 and an open group 84 formed by cam-shaped openings 74. The second circular sector 95 includes an open group 83 formed by circular openings 73 and an open group 88 formed by U-shaped notches 78. In addition, a circular opening 73' is respectively formed in the second circular sector 95.

[0089] The circular sectors 94 and 95 are alternately arranged with each other on the circumference U. A total of three first circular sectors 94 and three second circular sectors 95 are formed.

[0090] Based on the differently configured openings 70 or 73, 74, 78 and 80, it is possible to form an axial channel for the centrifugal separation liquid generated in the solid-wall screw centrifuge 10 independently of the pool depth 52 formed in the drum 16 of the solid-wall screw centrifuge 10.

[0091] List of reference numerals

[0092] 10 Solid-wall screw centrifuge

[0093] 12 longitudinal axis

[0094] 14 housing

[0095] 16 drum

[0096] 18 first drum bearing

[0097] 20 second drum bearing

[0098] 22 inlet for the material to be clarified

[0099] 24 outlet for the heavy phase

[0100] 26 outlet for the light phase

[0101] 28 drive

[0102] 30 centrifuge worm

[0103] 32 worm hub

[0104] 34 worm thread structure

[0105] 36 cylindrical longitudinal section

[0106] 38 conical longitudinal section

[0107] 40 first worm support

[0108] 42 second worm support

[0109] 44 closed peripheral surface

[0110] 46 inlet pipe

[0111] 48 inlet area

[0112] 52 pool depth

[0113] 56 grille structure

[0114] 58 longitudinal rod

[0115] 60 transverse disk

[0116] 64 inclined strut

[0117] 70 opening

[0118] 71, 71', 71", 71"', 71* round wire

[0119] 72 transverse disk circumference

[0120] 73, 73' circular opening

[0121] 74 cam-shaped opening

[0122] 75 First circular segment

[0123] 76 Second circular segment

[0124] 77 Connecting straight line

[0125] 78 U-shaped notch

[0126] 80 Central opening

[0127] 81 Circular

[0128] 82 Circular segment notch

[0129] 83 Opening group

[0130] 84 Opening group

[0131] 88 Opening group

[0132] 90 Notch

[0133] 94 First circular sector

[0134] 95 Second circular sector

[0135] M Center

[0136] U Circumferential

Claims

1. A solid-wall screw centrifuge (10) having a centrifuge worm (30), wherein the centrifuge worm at least partially has a worm hub (32) formed by longitudinal rods (58), and at least one transverse disk (60) is arranged in the worm hub (32) for stabilizing the worm hub structure (56), characterized in that, In the direction from the center point towards the periphery of the transverse disk, the transverse disk has imaginary circular lines, and on at least 75% of the circular lines among all the imaginary circular lines, at least one opening or a section of an opening is at least partially formed. A notch (90) is formed on the periphery (72) of the transverse disk, and the notches are arranged evenly. The notch (90) is used to accommodate the longitudinal rod (58).

2. The solid drum wall type spiral centrifuge (10) according to claim 1, characterized in that, An opening (70) is at least partially formed on all the imaginary circular lines (71) of the transverse disk (60).

3. The solid drum wall type spiral centrifuge (10) according to claim 1 or 2, characterized in that, The openings (70, 73, 75, 78, 80) of the transverse disk (60) have different geometric shapes and / or opening sizes and / or arrangement patterns.

4. The solid drum wall type spiral centrifuge (10) according to claim 1 or 2, characterized in that, A plurality of openings (74) of the transverse disk (60) are configured to be cam-shaped or oval-shaped or elliptical-shaped.

5. The solid drum wall type spiral centrifuge (10) according to claim 4, characterized in that, The plurality of openings (74) are arranged in pairs.

6. The solid drum wall type screw centrifuge (10) according to claim 1 or 2, characterized in that, A plurality of openings (78) of the transverse disk (60) are configured to be U-shaped notches starting from the periphery (72) of the transverse disk.

7. The solid drum wall type spiral centrifuge (10) according to claim 6, characterized in that, The U-shaped notches are arranged in pairs.

8. The solid drum wall type screw centrifuge (10) according to claim 1 or 2, characterized in that, A plurality of openings (73) of the transverse disk (60) are configured to be circular.

9. The solid drum wall type spiral centrifuge (10) according to claim 8, characterized in that, The circularly configured openings (73) are arranged in pairs.

10. The solid drum wall type spiral centrifuge (10) according to claim 1 or 2, characterized in that, The transverse disk has an opening (80) formed at the center (M) of the transverse disk (60). The opening has a circular shape (81), and the circular shape has additional circular arc-shaped notches (82).

11. The solid drum wall type spiral centrifuge (10) according to claim 10, characterized in that, The opening (80) formed at the center (M) of the transverse disk (60) has a circular shape (81), and the circular shape has three circular arc-shaped notches (82).

12. The solid drum wall type spiral centrifuge (10) according to claim 1 or 2, characterized in that, Irrespective of the pool depth (52) formed in the drum (16) of the solid-wall scroll centrifuge (10), the transverse disk (60) forms an axial channel for the centrifugal separation liquid generated in the solid-wall scroll centrifuge (10).

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