Rotor blade and rotor-stator system for rotor in mixer

Abstract

The invention describes a rotor blade (1) for a rotor in a mixer, the rotor blade (1) having a body (2) and a plurality of rotor wings (3) extending outwardly from one side of the body (2), with a gap (10) being provided between each pair of rotor wings (3), and wherein the gap (10) extends outwardly towards a peripheral portion of the rotor blade (1) in a surface (100) that is angled or curved with respect to a horizontal plane of the body (2) of the rotor blade (1). The invention also describes a rotor-stator system.

Description

Field of the Invention

[0001] The present invention relates to rotor blades for a rotor in a mixer and a rotor - stator system in a mixer. Summary of the Invention

[0003] The present invention relates to a rotor blade for a rotor in a mixer, the rotor blade having a body and a plurality of rotor wings extending outwardly from one side of the body, wherein a gap is provided between each pair of rotor wings, and wherein the gap extends outwardly towards the peripheral portion of the rotor blade in an angled or curved surface relative to the horizontal plane of the body of the rotor blade. Preferably, each gap extends outwardly towards the peripheral portion of the rotor blade in the angled or curved surface.

[0004] The rotor blade according to the present invention is for a rotor in a rotor - stator system of a mixer. The mixer can be used for many different types of materials, such as for mixing materials of different phases, such as a liquid phase and a solid phase. In addition, the rotor blade according to the present invention is also suitable for the mixing and processing of difficult materials, such as for mixing powder with liquid to produce granules. One type of interest in the present invention is materials containing starch.

[0005] The present invention aims to provide an optimized geometry between the rotor wings. This geometry ensures that the material being processed in the rotor is properly transferred from the rotor to the stator and then out of the mixer. Although only examples are given, the concept according to the present invention will be further understood from the embodiments and drawings provided below.

[0006] Specific Embodiments of the Invention

[0007] Some specific embodiments of the present invention are provided below.

[0008] According to one embodiment, each gap extends outwardly towards the peripheral portion of the rotor blade in an angled or curved surface.

[0009] According to one embodiment, the angled or curved surface extends into an overlapping surface which serves as an overlap between the rotor blade and the stator portion when the rotor blade is connected to a stator portion including a cone or a cylinder.

[0010] According to yet another embodiment, the length of the overlapping surface is in the range of greater than 0 mm and at most 55 mm, preferably in the range of greater than 0 mm and at most 20 mm, more preferably in the range of greater than 0 mm and at most 10 mm. This length can also be understood from the drawings. In this context, it can be mentioned that the rotor - stator slot length (see slot L in Figure 2b can be regarded as the corresponding length on the lower side of the overlapping surface.

[0011] In addition, other devices may also be included to enable, for example, the addition of water or other liquid solutions. Consistent therewith, according to one embodiment, the overlapping surface includes a channel, preferably arranged adjacent to the end of the angled or curved surface. The channel may be provided to enable the addition of water. In addition, water may also be added via the rotor-stator slots.

[0012] Furthermore, according to one embodiment, the angled or curved surface is angled or curved upward with respect to the horizontal plane of the main body of the rotor blade. This may be meaningful for ensuring a further vertical spraying angle outwards from the rotor blade. It should be noted that the relationship between this spraying angle and the corresponding angle on the stator side is an important aspect. This will be discussed further below.

[0013] Moreover, according to yet another embodiment, the angled or curved surface has at least one recess near the overlapping surface. This can also be a way to ensure a more vertical spraying angle.

[0014] The rotor wing is also an aspect of the rotor blade according to the present invention.

[0015] According to one embodiment, each of the plurality of rotor wings has a protrusion arranged along the extension of the at least one rotor wing, wherein, in the front side of the rotor wing in the rotational direction, the at least one rotor wing extends through point A2, which is the point furthest from the rotational direction, and the at least one rotor wing further extends upward through point A1, which is the most forward point in the rotational direction, and wherein point A1 is set as the most vertically top end point of the protrusion or at least set in the horizontal top end plane of the protrusion.

[0016] In addition, the rotor wing can have different shapes. According to one embodiment, the at least one rotor wing extends through point A2, which is the point farthest from the direction of rotation, and the at least one rotor wing further extends upward through point A1, which is the most forward point in the direction of rotation. There is a distance A between point A2 and point A1, such that A > 0. According to another embodiment, a protrusion is located at the end of the at least one rotor wing. Further, according to one embodiment, the end of the protrusion has a thickness C that extends from the bottom point B2 to the top point, preferably to the top point A1, which is the most forward point in the direction of rotation. Preferably, C is in the range of 3 - 30 mm. Further, according to one embodiment, the top point A1 is more forward in the direction of rotation than the bottom point B2 of the end of the protrusion, which means that when observed from the bottom point B2 to the top point A1, the end of the protrusion is inclined or bent outward in the direction of rotation. Further, according to another embodiment, the bottom point B2 and the top point A1 define an angle B° with the imaginary vertical end of the protrusion, and the angle B° is in the range of -15° to 60°. According to yet another embodiment, an end face is provided that extends from the top point A1 of the end to the bottom point B2, and the end face has an inclination or is concave, preferably inclined. Further, according to another embodiment, the height H of the at least one rotor wing extends from the side of the main body of the rotor blade and extends to the top of the at least one rotor wing. Preferably, the top is located at point A1, which is the most forward point in the direction of rotation. Where H is at least 2*A, preferably where A / H is in the range of 1 / 50 - 2 / 5, more preferably where A / H is in the range of 1 / 25 - 1 / 5, and most preferably A is at most 300 mm. According to yet another embodiment of the present invention, the height H of the at least one rotor wing extends from the side of the main body of the rotor blade and extends to the top of the at least one rotor wing, and 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.

[0017] In addition, according to another embodiment, the protrusion is provided as a hook-shaped extension at the end of the at least one rotor wing. The hook-shaped extension means that the at least one rotor wing extends from the main body at a non-vertical angle in a direction away from the direction of rotation. Somewhere along the extension of the at least one rotor wing, then the at least one rotor wing bends backward toward the direction of rotation to provide a hook-shaped extension in the direction of rotation.

[0018] In addition, according to one embodiment, the plurality of rotor blades extend from the outer periphery of the body, which is preferably circular. Further, according to another embodiment, the plurality of rotor blades extend perpendicularly from the geometric XY coordinate plane on one side of the body, or extend from the geometric XY coordinate plane on one side of the body at an angle ax from the fully perpendicular extension in the X direction and / or at an angle ay from the fully perpendicular extension in the Y direction.

[0019] The present invention also relates to a rotor - stator system, which includes rotor blades for a rotor in a mixer, the rotor blades having a body and a plurality of rotor wings extending outwardly from one side of the body, wherein a gap is provided between each pair of rotor wings, and the gap provides a surface extending into an overlapping surface, and the overlapping surface serves as a separate but overlapping surface of the rotor blade relative to a cone or cylinder of the stator part of the rotor - stator system.

[0020] According to one embodiment, the length of the overlapping surface ranges from greater than 0 mm to a maximum of 55 mm, preferably from greater than 0 mm to a maximum of 20 mm, more preferably from greater than 0 mm to a maximum of 10 mm. Further, according to another embodiment, the overlapping surface includes a channel, preferably the channel is arranged adjacent to the end of the angled or curved surface.

[0021] The present invention also relates to a rotor - stator system, which includes rotor blades for a rotor in a mixer, the rotor blades having a body and a plurality of rotor wings extending outwardly from one side of the body, wherein a gap is provided between each pair of rotor wings, and the gap provides a surface extending into an overlapping surface, and the overlapping surface serves as a separate but overlapping surface of the rotor blade relative to a cone or cylinder of the stator part of the rotor - stator system, wherein

[0022] S is the ejection angle outward from the overlapping surface;

[0023] K is the direction angle of the cone or cylinder; and the difference between angle S and angle K is at most 60 degrees, preferably at most 45 degrees, more preferably at most 30 degrees, and most preferably at most 20 degrees.

[0024] It should be understood from the foregoing that the S angle of the direction angle from the overlapping surface outward and into the cone or cylinder is a key aspect of the present invention, and this S angle corresponds to or at least does not differ much from the direction angle of the cone or cylinder. In addition, it should be noted that the difference between the angle S and the angle K should be understood in absolute terms, that is, one or both of these angles can be negative angles relative to a given reference. In addition, since the relationship between these angles is crucial, the receiving part of the stator can be more or less vertical, that is, any configuration from the cone to the cylinder. In addition, the angles can be set such that the injection is upward or downward according to the applicability of the rest of the system. The difference in angles can also vary based on the material being mixed.

[0025] According to yet another embodiment, V is the angle difference when the material being mixed leaves the angled or curved surface of the rotor blade and enters the surface of the cone or cylinder of the stator part, where V = K - S; and where -30° < V < 30°.

[0026] In addition, according to one embodiment, the rotor-stator slot is arranged between the overlapping surface of the rotor blade on the lower side of the rotor blade and the cone or cylinder of the stator part, and preferably where the rotor-stator slot has a length of 20 mm, preferably a maximum of 15 mm, and most preferably a maximum of 10 mm. This length is shown as "slot L" in Figure 2b which.

[0027] In addition, according to yet another embodiment, the rotor-stator slot is arranged to extend into a geometrical expansion. A short rotor-stator slot with a geometric expansion extending in some form is associated with minimizing the risk of material fouling or hardening on the surface. When, for example, a starch material is processed or mixed, such an accumulation of material on the surface is a risk. This in turn means that blockages may occur in the slot, and then the processing may be disturbed. Arranging a geometric expansion in the said slot is associated with minimizing the risk of blockage.

[0028] According to one embodiment, the rotor blade has a central unit for connecting the rotor blade to the rotor in the mixer.

[0029] Detailed Description of the Drawings

[0030] In Figure 1a and Figure 1b there is shown an embodiment of a rotor-stator system according to the present invention. The rotor blade 1 includes a body 2 and a plurality of rotor wings 3 extending outward from one side of the body 2, where a gap 10 is provided between each pair of rotor wings 3, and where the gap 10 extends outward in an angled or curved surface 100 towards the peripheral part of the rotor blade 1 (see Figure 2a)。The system also includes a cone or cylinder 20 of the 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 frame that defines an expected outflow. Such an outflow can be of many different types, such as a grid with only one opening or several openings.

[0031] In Figure 2a , a cross-section of a part of a rotor-stator system according to an embodiment of the present invention is shown. In this case, the rotor blade 3 is shown. The gap 10 has a surface 100 that extends into an overlapping surface 101, which serves as a separate but overlapping surface of the rotor blade 1 relative to the cone or cylinder 20 of the stator part of the rotor-stator system.

[0032] In Figure 2b , another view of a smaller part of a rotor-stator system according to an embodiment of the present invention is shown. In this case, only a smaller part of the gap 10 provided between a pair of rotor blades 3 is shown. The gap 10 has a surface 100 that extends into an overlapping surface 101 (see Figure 2a ), which is an overlapping surface of the rotor blade 1 relative to the cone or cylinder 20 of the stator part of the rotor-stator system, and a slot is provided between the overlapping surface 101 and the other side of the cone or cylinder 20 that is the stator part. As shown, the slot has a length shown as slot L. In addition, S is the ejection angle outward from the overlapping surface 100, and K is the direction angle of the cone or cylinder 20. According to the present invention, the difference between the angle S and the angle K is at most 60 degrees.

[0033] In Figure 3 , the rotor blade 3 is shown, which is a potential part of a rotor blade according to an embodiment of the present invention. The rotor blade 3 has a protrusion 4 provided along the extension of the at least one rotor blade 3. It can be seen that in the front side of the at least one rotor blade 3 along the rotation direction, the at least one rotor blade 3 extends through point A2, which is the point farthest from the rotation direction, and the at least one rotor blade 3 further extends upward through point A1, which is the most forward point in the rotation direction, and in this case, point A1 is set as the most vertical top end point of the protrusion 4. In addition, in this case, there is a distance A between the point A2 and the point A1, such that A>0. In addition, the rotor blade also has a top 6. In addition, according to this embodiment, the end 5 of the protrusion 4 has a thickness C, which extends from the bottom point B2 to the top point, and in this case, extends to the top point A1, which is the most forward point in the rotation direction.

[0034] In addition, in this embodiment, the bottom point B2 and the top point A1 and the imaginary vertical end 5 of the protrusion 4 define an angle B°. Further, the height H of the at least one rotor wing 3 extends from one side of the body 2 of the rotor blade 1 and extends to the top 6 of the at least one rotor wing 3, where H is at least 2*A.

Claims

1. A rotor blade (1) for a rotor in a mixer, the rotor blade (1) having a body (2) and a plurality of rotor wings (3) extending outwardly from one side of the body (2), wherein a gap (10) is provided between each pair of rotor wings (3), and wherein the gap (10) extends outwardly towards the peripheral portion of the rotor blade (1) in an angled or curved surface (100) relative to the horizontal plane of the body (2) of the rotor blade (1).

2. The rotor blade (1) according to claim 1, wherein, Each gap (10) extends outwardly towards the peripheral portion of the rotor blade (1) in the angled or curved surface (100).

3. The rotor blade (1) according to claim 1 or 2, wherein, The angled or curved surface (100) extends into an overlapping surface (101) which serves as an overlap between the rotor blade (1) and a stator portion when the rotor blade (1) is connected to a stator portion including a cone or a cylinder (20).

4. The rotor blade (1) according to claim 3, wherein, The length of the overlapping surface (101) is in the range of greater than 0 mm and at most 55 mm, preferably in the range of greater than 0 mm and at most 20 mm, more preferably in the range of greater than 0 mm and at most 10 mm.

5. The rotor blade (1) according to claim 3 or 4, wherein, The overlapping surface (101) includes a channel, preferably the channel is arranged adjacent to the end of the angled or curved surface (100).

6. The rotor blade (1) according to any one of claims 1-5, wherein, The angled or curved surface (100) is angled or curved upward relative to the horizontal plane of the body (2) of the rotor blade (1).

7. The rotor blade (1) according to any one of claims 3 - 6, wherein, The angled or curved surface (100) has at least one recessed portion near the overlapping surface (101).

8. The rotor blade (1) according to any one of claims 1-7, wherein, Each of the plurality of rotor wings (3) has a protrusion (4) arranged along the extension of the at least one rotor wing (3), wherein, in the front side of the rotor wing (3) in the rotational direction, the at least one rotor wing (3) extends through a point A2 which is the point farthest from the rotational direction, and the at least one rotor wing (3) further extends upward through a point A1 which is the most forward point in the rotational direction, and wherein the point A1 is set as the uppermost vertical top end point of the protrusion (4) or at least in the horizontal top end plane of the protrusion (4).

9. The rotor blade (1) according to claim 8, wherein, The at least one rotor wing (3) extends through the point A2 which is the point farthest from the rotational direction, and the at least one rotor wing (3) further extends upward through the point A1 which is the most forward point in the rotational direction, and the points A2 and A1 have a distance A therebetween such that A > 0.

10. The rotor blade (1) according to any one of claims 8 or 9, wherein, The protrusion (4) is located at the end (5) of the at least one rotor wing (3).

11. The rotor blade (1) according to claim 10, wherein, The end (5) of the protrusion (4) has a thickness C which extends from a bottom point B2 to a top point, preferably to the top point A1 which is the most forward point in the rotational direction, preferably wherein C is in the range of 3 - 30 mm.

12. The rotor blade (1) according to claim 11, wherein, The top point A1 is further forward in the rotation direction than the bottom point B2 of the end (5) of the protrusion (4), which means that when viewed from the bottom point B2 to the top point A1, the end (5) of the protrusion (4) is inclined or curved outwards in the rotation direction.

13. The rotor blade (1) according to claim 11 or 12, wherein, The bottom point B2 and the top point A1 define an angle B° with the imaginary vertical end (5) of the protrusion (4), and the angle B° is in the range of -15° to 60°.

14. A rotor blade (1) according to any one of claims 8 - 13, wherein, There is an end face arranged from the top point A1 to the bottom point B2 of the end (5), and the end face has an inclination or is concave, preferably inclined.

15. A rotor blade (1) according to any one of claims 8 - 14, wherein, The height H of the at least one rotor wing (3) extends from the side of the body (2) of the rotor blade (1) to the top (6) of the at least one rotor wing (3), preferably where the top (6) is located at point A1, which is the most forward point in the rotation direction, where H is at least 2*A, preferably where A / H is in the range of 1 / 50 - 2 / 5, more preferably where A / H is in the range of 1 / 25 - 1 / 5, and most preferably the maximum value of A is 300 mm.

16. The rotor blade (1) according to any one of claims 8 - 15, wherein, The height H of the at least one rotor wing (3) extends from the side of the body (2) of the rotor blade (1) to the top (6) of the at least one rotor wing (3), and H is less than D, where D is the diameter of the body (2) of the rotor blade (1), preferably H is at most D / 2.

17. The rotor blade (1) according to any one of claims 8 - 16, wherein, The protrusion (4) is provided as a hook-shaped extension at the end (5) of the at least one rotor wing (3), and the hook-shaped extension means that the at least one rotor wing (3) extends from the body (2) at a non-vertical angle in the direction away from the rotation direction, and at one place along the extension of the at least one rotor wing (3), the at least one rotor wing (3) then bends backward towards the rotation direction to provide the hook-shaped extension in the rotation direction.

18. A rotor blade (1) according to any one of the preceding claims, wherein, The plurality of rotor wings (3) extend from the outer periphery of the body (2), and the body (2) is preferably circular.

19. A rotor blade (1) according to any one of the preceding claims, wherein, The plurality of rotor wings (3) extend perpendicularly from the geometric XY coordinate plane on one side of the body (2), or extend from the geometric XY coordinate plane on one side of the body (2) at an angle (ax) from the completely vertical extension in the X direction and / or at an angle (ay) from the completely vertical extension in the Y direction.

20. A rotor-stator system, comprising a rotor blade (1) for a rotor in a mixer, the rotor blade (1) having a body (2) and a plurality of rotor wings (3) extending outward from one side of the body (2), wherein a gap (10) is provided between each pair of rotor wings (3), and the gap (10) provides a surface (100) extending into an overlapping surface (101), and the overlapping surface (101) serves as a separate but overlapping surface of the rotor blade (1) relative to a cone or cylinder (20) of the stator part of the rotor-stator system.

21. The rotor-stator system according to claim 20, wherein, The length of the overlapping surface (101) is in the range greater than 0 mm and up to 55 mm, preferably in the range greater than 0 mm and up to 20 mm, more preferably in the range greater than 0 mm and up to 10 mm.

22. The rotor-stator system according to claim 20 or 21, wherein, The overlapping surface (101) includes channels, preferably the channels are arranged adjacent to the end of the angled or curved surface (100).

23. The rotor-stator system according to any one of claims 20-22, wherein S is the ejection angle outward from the overlapping surface (100); K is the direction angle of the cone or cylinder (20); and the difference between the angle S and the angle K is at most 60 degrees, preferably at most 45 degrees, more preferably at most 30 degrees, and most preferably at most 20 degrees.

24. The rotor-stator system according to any one of claims 20-23, the rotor-stator system having rotor blades (1) according to any one of claims 1-19.

25. The rotor-stator system according to any one of claims 20-24, wherein V is the angle difference of the material being mixed when leaving the angled or curved surface (100) of the rotor blade (1) and entering the surface of the cone or cylinder (20) of the stator part, where V = K - S; and where -30° < V < 30°.

26. The rotor-stator system according to any one of claims 20-25, wherein, A rotor-stator slot is arranged between the overlapping surface (101) of the rotor blade (1) on the lower side of the rotor blade (1) and the cone or cylinder (20) of the stator part, and preferably the rotor-stator slot has a length of 20 mm, preferably at most 15 mm, and most preferably at most 10 mm.

27. The rotor-stator system according to claim 26, wherein, The rotor-stator slot is arranged to extend into the geometric expansion.

28. The rotor-stator system according to any one of claims 20-27, wherein, The rotor blade (1) has a central unit for connecting the rotor blade (1) to the rotor in the mixer.

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