Rotor blades intended for rotors in mixers and rotor-stator systems.
Patent Information
- Application Number
- TH2501003149
- Authority / Receiving Office
- TH · TH
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2023-11-14
- Publication Date
- 2026-10-05
AI Technical Summary
Existing rotor blades in mixers face challenges in optimizing the geometry between rotor wings for efficient material transfer from the rotor to the stator and subsequent processing, particularly with difficult materials like powders and starch-containing mixtures, where traditional designs fail to ensure effective mixing and processing.
The rotor blade features angled or bent gaps between rotor wings extending towards the peripheral part, with overlapping surfaces and channels for liquid addition, and protrusions on the rotor wings to enhance vertical spraying angles, ensuring optimal interaction with the stator system, including cones or cylinders, to facilitate efficient mixing and processing.
This design enhances material transfer and processing efficiency by optimizing the geometry and interaction between rotor and stator components, allowing for effective mixing of various materials, including powders and starch-containing mixtures, with improved vertical spraying angles and liquid distribution.
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Abstract
Description
[0001] A ROTOR BLADE INTENDED FOR A ROTOR IN A MIXER AND A ROTOR-STATOR SYSTEM
[0002] Field of the invention
[0003] The present invention relates to a rotor blade intended for a rotor in a mixer, and to a rotor-stator system in a mixer. of the invention
[0004] The present invention is directed to a rotor blade intended for a rotor in a mixer, said rotor blade having a main body and multiple rotor wings extending out from one side of the main body, wherein there is provided a gap between each pair of rotor wings, and wherein the gap extends outwards towards a peripheral part of the rotor blade in an angled or bent surface in relation to a horizontal plane of the main body of the rotor blade. Preferably each gap extends outwards towards a peripheral part of the rotor blade in an angled or bent surface.
[0005] The rotor blade according to the present invention is intended for a rotor in a rotor-stator system for a mixer. The mixer may be used for many different types of materials, such as for mixing different phase materials, e.g. one liquid phase with one solid phase. Furthermore, the rotor blade according to the present invention is also suitable for the mixing and processing of difficult materials, such as for mixing a powder with a liquid for the production of granules. One type of interest for the present invention is materials containing starch.
[0006] The present invention is directed to providing an optimal geometry between the rotor wings. This geometry ensures a suitable transfer from the rotor into a stator and then out from the mixer for the material being processed in the rotor. Although only presenting examples, the concept according to the present invention will be further understood from the embodiments provided below and the attached drawings.
[0007] Specific embodiments of the invention
[0008] Below some specific embodiments of the present invention are provided.
[0009] According to one embodiment, each gap extends outwards towards a peripheral part of the rotor blade in an angled or bent surface. According to one embodiment, the angled or bent surface extends in an overlapping surface which is intended as an overlap between the rotor blade when being connected to a stator part comprising a cone or cylinder.
[0010] According to yet another embodiment, the overlapping surface has a length in a range of above 0 mm and maximum 55 mm, preferably in a range of above 0 mm and maximum 20 mm, more preferably in range of above 0 mm and maximum 10 mm. This length may also be understood from the enclosed figures. In this context, it may be mentioned that a rotor-stator slot length (see SlotL in fig. 2b) may be seen as a corresponding length on the underside of the overlapping surface.
[0011] Furthermore, there may also be other means included to enable for e.g. addition of water or other liquid solutions. In line with this, according to one embodiment, the overlapping surface comprises a channel, preferably the channel is provided in a close proximity to an end of the angled or bent surface. This channel may be provided for enabling of water addition. Moreover, water may also be added via the rotor-stator slot.
[0012] Furthermore, according to one embodiment, the angled or bent surface is angled or bent upwards in relation to a horizontal plane of the main body of the rotor blade. This may be of interest to ensure a further vertical spraying angle out from the rotor blade. It should be noted that this the relationship between this spraying angle and a corresponding angle on the stator side is one important aspect. This is further discussed below.
[0013] Moreover, according to yet another embodiment, the angled or bent surface has at least a concave portion in proximity to the overlapping surface. This may also be a way for ensuring a more vertical spraying angle.
[0014] Also the rotor wings are one aspect of rotor blades according to the present invention.
[0015] According to one embodiment, each of the multiple rotor wings has a protrusion provided along the extension of said at least one rotor wing, wherein, in a front side of the rotor wing in a rotational direction, said at least one rotor wing extends through a point A2 being a point furthest away from the rotational direction and further up extends through a point A1 being a point furthest into the rotation direction, and wherein the point A1 is provided as a most vertical top end point of the protrusion or at least in a horizontal top end plane of the protrusion.
[0016] Furthermore, the rotor wings may have different shape. According to one embodiment, said at least one rotor wing extends through the point A2 being a point furthest away from a rotational direction and further up extends through the point A1 being a point furthest into the rotation direction, said points A2 and A1 having a distance A between each other so that A > 0. According to yet another embodiment, the protrusion is at an end of said at least one rotor wing. Moreover, according to one embodiment, the end of the protrusion has a thickness C, extending from a bottom point B2 to the top point, preferably to a top point A1 being a point furthest into the rotation direction, preferably wherein C is in the range of 3 - 30 mm. Furthermore, according to one embodiment, the top point A1 is further into the rotation direction than the bottom point B2 of the end of the protrusion, which implies that the end of the protrusion is inclined or bent outwards in the rotational direction, seen from the bottom point B2 and up to the top point A1. Moreover, according to yet another embodiment, the bottom point B2 and the top point A1 defines and angle B° with an imaginary perpendicular end of the protrusion, and wherein angle B° is in the range of from -15° to 60°. According to yet another embodiment, there is provided an end surface arranged from the top point A1 to the bottom point B2 of the end, and wherein the end surface has an inclination or is concave, preferably is inclined. Moreover, according to yet another embodiment, the height H of said at least one rotor wing extends from said one side of the main body of the rotor blade and to the top of said at least one rotor wing, preferably wherein the top is in a point A1 being a point furthest into the rotation direction, wherein H is at least 2 * A, preferably wherein A / H is in a range of 1 / 50 - 2 / 5, more preferably wherein A / H is in a range of 1 / 25 - 1 / 5, most preferably A is maximum 300 mm. According to yet another embodiment of the present invention, the height H of said at least one rotor wing extends from said one side of the main body of the rotor blade and to the top of said at least one rotor wing, and wherein H is less than D where D is the diameter of the main body of the rotor blade, preferably H is at most D / 2. Moreover, according to yet another embodiment, the protrusion is provided as a hook extension at an end of said at least one rotor wing, said hook extension implying that said at least one rotor wing extends with a nonperpendicular angle from the main body in a direction pointing away from the rotational direction, somewhere along the extension of said at least one rotor wing, and then bends back in the rotational direction to provide for the hook extension in the rotational direction.
[0017] Furthermore, according to one embodiment, said multiple rotor wings extend from an outer periphery of the main body, said main body preferably being circular. Moreover, according to yet another embodiment, said multiple rotor wings extend perpendicular from a geometrical XY coordinate plane of said one side of the main body or extend with an angle ax in a X direction and / or an angle ay in the Y direction from a totally perpendicular extension from the geometrical XY coordinate plane of said one side of the main body.
[0018] The present invention is also directed to a rotor-stator system comprising a rotor blade intended for a rotor in a mixer, said rotor blade having a main body and multiple rotor wings extending out from one side of the main body, wherein there is provided a gap between each pair of rotor wings, wherein the gap provides a surface extending in an overlapping surface which functions as a separate but overlapping surface of the rotor blade in relation to a cone or cylinder of a stator part of the rotor-stator system.
[0019] According to one embodiment, the overlapping surface has a length in a range of above 0 mm and maximum 55 mm, preferably in a range of above 0 mm and maximum 20 mm, more preferably in range of above 0 mm and maximum 10 mm. Moreover, according to yet another embodiment, the overlapping surface comprises a channel, preferably the channel is provided in a close proximity to an end of the angled or bent surface.
[0020] The present invention is also directed to a rotor-stator system comprising a rotor blade intended for a rotor in a mixer, said rotor blade having a main body and multiple rotor wings extending out from one side of the main body, wherein there is provided a gap between each pair of rotor wings, wherein the gap provides a surface extending in an overlapping surface which functions as a separate but overlapping surface of the rotor blade in relation to a cone or cylinder of a stator part of the rotor-stator system, wherein
[0021] - S is a spraying angle out from the overlapping surface;
[0022] - K is a direction angle of the cone or cylinder; and wherein a difference of angle S and angle K to each other is maximum 60 degrees, preferably maximum 45 degrees, more preferably maximum 30 degrees, most preferably maximum 20 degrees.
[0023] As should be understood from above, an S angle out from the overlapping surface and over into the direction angle of the cone or cylinder that correspond or at least do not differ too much is a key aspect of the present invention. Furthermore, it should be noted that the difference of the angles S and K should be understood to be in absolute terms, i.e. one or both of these angles may be a negative angle in relation to a given reference. Moreover, as it is the relationship between these angles that is key, the receiving part of the stator may be more or less vertical, i.e. everything from a cone to a cylinder. Furthermore, the angles may be provided so that the spraying is performed upwards or downwards depending on suitability of the rest of the system. The difference of the angles may also differ based on the material being mixed.
[0024] According to yet another embodiment, V is an angle difference for a material being mixed when leaving the angled or bent surface of the rotor blade and entering into a surface of the cone or cylinder of the stator part, wherein V = K - S; and wherein - 30° < V < 30°.
[0025] Moreover, according to one embodiment, there is arranged a rotorstator slot between the overlapping surface of the rotor blade on an underside of the rotor blade and the cone or cylinder of a stator part, and preferably wherein the rotor-stator slot has a length of 20 mm, preferably maximum 15 mm, most preferably maximum 10 mm. This length is shown as “SlotL” in fig. 2b.
[0026] Furthermore, according to yet another embodiment, the rotor-stator slot is arranged to extend into a geometrical expansion. To have a short rotorstator slot which extends into some form of geometrical expansion is relevant to minimize the risk of fouling or hardening of material on the surface. Such accumulation of material on the surface is a risk when e.g. starch materials are being processed or mixed. This in turn implies that clogging may be obtained in the slot and then the processing may be disturbed. The provision of a geometrical expansion in said mention slot is relevant to minimize the risk of the clogging.
[0027] According to one embodiment, the rotor blade has a center unit intended for connecting the rotor blade to a rotor in a mixer. Detailed description of the drawings
[0028] In figs. 1a and 1 b there are shown one embodiment of a rotor-stator system according to the present invention. The rotor blade 1 comprises a main body 2 and multiple rotor wings 3 extending out from one side of the main body 2, where there is provided gaps 10 between each pair of rotor wings 3, and where the gaps 10 extends outwards towards a peripheral part of the rotor blade 1 in an angled or bent surface 100 (see fig. 2a). The system also comprises a cone or cylinder 20 of a stator part of the rotor-stator system. It should be noted that the rotor-stator should also be connected to other parts of the system, such as a framework where an intended outflow is defined. This outflow may be of many different types, such as only one opening or a grid with several openings.
[0029] In fig. 2a there is shown a cross section of part of a rotor-stator system according to one embodiment of the present invention. In this case, a rotor wing 3 is shown. The gap 10 has a surface 100 extending in an overlapping surface 101 which functions as a separate but overlapping surface of the rotor blade 1 in relation to a cone or cylinder 20 of a stator part of the rotor-stator system.
[0030] In fig. 2b there is shown another view of minor part of a rotor-stator system according to one embodiment of the present invention. In this case only a minor part of gap 10 provided between a pair of rotor wings 3 is shown. The gap 10 has a surface 100 (see fig. 2 a) extending in an overlapping surface 101 which is an overlapping surface of the rotor blade 1 in relation to a cone or cylinder 20 of a stator part of the rotor-stator system, and wherein there is provided a slot between the overlapping surface 101 and the other side being the cone or cylinder 20 of the stator part. As seen, the slot has a length shown as SlotL. Moreover, S is a spraying angle out from the overlapping surface 100, K is a direction angle of the cone or cylinder 20. According to the present invention, a difference of angle S and angle K to each other is maximum 60 degrees.
[0031] In fig. 3 there is shown a rotor wing 3 which is a potential part of the rotor blade according to one embodiment of the present invention. The rotor wing 3 has a protrusion 4 provided along the extension of said at least one rotor wing 3. As may be seen, in a front side of the rotor wing 3 in a rotational direction, said at least one rotor wing 3 extends through a point A2 being a point furthest away from the rotational direction and further up extends through a point A1 being a point furthest into the rotation direction, and wherein the point A1 in this case is provided as a most vertical top end point of the protrusion 4. Furthermore, in this case said points A2 and A1 has a distance A between each other so that A > 0. Moreover, the rotor wing also has a top 6. Furthermore, according to this embodiment, the end 5 of the protrusion 4 has a thickness C, extending from a bottom point B2 to the top point, and in this case to a top point A1 being a point furthest into the rotation direction.
[0032] Moreover, in this embodiment, the bottom point B2 and the top point A1 defines and angle B° with an imaginary perpendicular end 5 of the protrusion 4. Furthermore, the height H of said at least one rotor wing 3 extends from one side of the main body 2 of the rotor blade 1 and to the top 6 of said at least one rotor wing 3, wherein H is at least 2 * A.
Claims
DEPCT6813 / 08 / 25681.Rotor(1) intended for rotor in mixer, such rotor(1) having a main body(2) and several rotor wings(3) protruding from one side of the main body(2), where gaps(10) are provided between each pair of rotor wings(3), and where gaps(10) protrude outward toward the outer surface of the rotor(1) in an angled or bent surface(100) relative to the horizontal plane of the main body(2) of the rotor(1).2.Rotor(1) according to claim 1, where each gap(10) protrudes 1. The rotor (1) under claim 1 or 2, where the angled or bent surface (100) extends into the overlapping surface (101) which is intended to be the overlapping part between the rotor (1) when connected to the stator assembled with a cone or cylinder (20).
2. The rotor (1) under claim 3, where the overlapping surface (101) has a length in the range above 0mm and maximum 55mm, suitable in the range above 0mm and maximum 20mm, more suitable in the range above 0mm and maximum 10mm. 3.Rotor(1) under any of the claims 3 or 4, in which the overlapping surface(101) is incorporated with a channel, where the appropriate channel is arranged in close proximity to the end of the angled or bent surface(100).
6. Rotor(1) under any of the claims 1–5, in which the angled or bent surface(100) is angled or bent upwards relative to the horizontal plane of the main body(2) of the rotor(1).
7. Rotor(1) under any of the claims 3–6, in which the angled or bent surface(100) has at least a concave section near the overlapping surface(101).
8. Rotor Tor(1) under any of the claims 1-7, where each of the rotor wing(3) has an overhang(4) which is arranged in line with the overhang of at least one such rotor wing(3), where, in front of the rotor wing(3) in the direction of rotation, at least one such rotor wing(3) extends through point A2 which is furthest from the direction of rotation and extends further up through point A1 which is furthest into the direction of rotation, and where point A1 is arranged as the vertical uppermost end of the overhang(4) or at least in the horizontal uppermost plane of the overhang(4).9.
10. A rotor (1) under either claim 8, where at least one such rotor wing (3) extends through point A2 which is the furthest point from the direction of rotation and extends further up through point A1 which is the furthest point into the direction of rotation, such points A2 and A1 have a distance A between each other such that A > 0.
11. A rotor (1) under either claim 8 or 9, where the extension (4) is at the end (5) of at least one such rotor wing (3).
12. A rotor (1) under claim 10, where The tip (5) of the projection (4) has a thickness C, extending from the bottom point B2 to the top point, suitable to the top point A1, which is the furthest point into the direction of rotation, suitable where C is in the range of 3-30 mm.
12. The rotor (1) according to claim 11, where the top point A1 enters the direction of rotation beyond the bottom point B2 of the tip (5) of the projection (4), implying that the tip (5) of the projection (4) is tilted or bent outward in the direction of rotation, visible from the bottom point B2 and up to the top point A1.13.Rotor(1) under any of claims 11 or 12, where the bottom point B2 and the top point A1 define an angle B degrees with the imaginary perpendicular end (5) of the projection (4), and where the angle B degrees is in the range from –15 degrees to 60 degrees.
14. Rotor(1) under any of claims 8-13, where the surface of the end is arranged from the top point A1 to the bottom point B2 of the end (5), and where the surface of the end is tilted or has a concave shape, the appropriate tilt is made.
15. Rotor(1) under any of claims 8-13, Any of the rights under clauses 8-14, where the height H of at least one such rotor wing (3) extends from one such side of the main body section (2) of the rotor (1) and to the top (6) of at least one such rotor wing (3), where the top (6) is at point A1 which is the furthest point into the direction of rotation, where H is at least 2*A, where A / H is in the range of 1 / 50-2 / 5, more suitable where A / H is in the range of 1 / 25-1 / 5, the most suitable maximum A is 300mm16.Rotor(1) under any of the claims 8-15, where the height H of at least one such rotor wing (3) extends from one such side of the main body (2) of the rotor(1) and to the top (6) of at least one such rotor wing (3), and where H is less than D where D is the diameter of the main body (2) of the rotor(1), the appropriate maximum H is D / 217. Rotor(1) under any of the claims 8-16, where the extension (4) is arranged as a hook extension at the end (5) of at least one such rotor wing. (3) Such hook-like projections imply that at least one such rotor wing (3) extends at a non-perpendicular angle from the main body (2) in a direction away from the direction of rotation, somewhere along the projection of at least one such rotor wing (3), and then bends back in the direction of rotation to provide a hook-like projection in the direction of rotation.
18. Rotor (1) according to one of the preceding claims, where several such rotor wings (3) extend from the outer periphery of the main body (2), such main body (2) is circular.19.Rotor(1) under any of the preceding claims, where such rotor wings(3) extend perpendicularly from the geometric XY coordinate plane of such one side of the main body(2) or extend by an angle(ax) in the X direction and / or an angle(ay) in the Y direction from a perfectly perpendicular extension from the geometric XY coordinate plane of such one side of the main body(2).
20. A rotor-stator system incorporating a rotor(1) intended for a rotor in a mixer, such rotor(1) having a main body(2) and several rotor wings(3) extending from One side of the main body (2), where a gap (10) is provided between each pair of rotor blades (3), where the gap (10) provides a surface (100) that protrudes into the overlapping surface (101) which acts as a separating but overlapping surface of the rotor blades (1) relative to the cone or cylinder (20) of the stator section of the rotor-stator system.
21. The rotor-stator system according to claim 20, where the overlapping surface (101) has a length in the range above 0mm and a maximum of 55mm, suitable in the range above 0mm and a maximum of 20mm, more suitable in the range above 0mm and a maximum of 10mm.22.Rotor-stator systems under claim 20 or 21, where the overlapping surfaces (101) are incorporated with channels, where appropriate channels are arranged in proximity to the ends of angled or bent surfaces (100).
23. Rotor-stator systems under either claim 20-22, where -S is the angle of the area away from the overlapping surfaces (100); -K is the direction angle of the cone or cylinder (20); and where the difference of the angles S and K with each other is a maximum of 60 degrees, appropriately a maximum of 45 degrees, appropriately 24. A rotor-stator system according to any of the claims 20-23, with rotor blades (1) according to any of the claims 1-19.
25. A rotor-stator system according to any of the claims 20-24, where -V is the difference of the angle for the mixed material when leaving the angled or bent surface (100) of the rotor blades (1) and entering the surface of the cone or cylinder (20) of the stator section, where V=KS; and where –30 degrees. <V<30องศา26.Rotor-stator systems under any of the claims 20-25, in which rotor-stator slots are arranged between the overlapping surfaces (101) of the rotor blades (1) at the bottom of the rotor blades (1) and the cone or cylinder (20) of the stator section, and where the rotor-stator slots are 20 mm long, maximum 15 mm, maximum 10 mm.
27. Rotor-stator systems under claim 26, in which rotor-stator slots are arranged to protrude into geometric extensions.
28. Rotor-stator systems under any of the claims 20-27, in which the rotor blades (1) have a central unit intended for connecting the rotor blades (1) to the rotor in the mixer;