CN111376404A

CN111376404A - Feeding mixing impeller unit and feeding mixing impeller

Info

Publication number: CN111376404A
Application number: CN201910221720.3A
Authority: CN
Inventors: 韩泽良
Original assignee: Xingtai Xinde New Materials Technology Co ltd
Current assignee: Xingtai Xinde New Materials Technology Co ltd
Priority date: 2018-12-28
Filing date: 2019-03-22
Publication date: 2020-07-07
Also published as: CN210233584U

Abstract

The invention discloses a feeding mixing impeller unit and a feeding mixing impeller, wherein the feeding mixing impeller unit comprises a base body and at least one mixing tooth connected to the base body; comprises a base body and at least one mixing tooth connected to the base body; wherein the base has an axis of revolution and is rotatable about the axis of revolution; each mixing tooth is of a straight rod structure and is provided with an extending axis in the length direction; each mixing tooth has a fixed end connected to the base and a working end that is radially and tangentially remote from the axis of rotation in the direction of rotation of the base. The invention has the beneficial effects that: improve the isotropy of the chopped fibers and realize the equal-proportion input and output of the materials.

Description

Feeding mixing impeller unit and feeding mixing impeller

Technical Field

The invention relates to the technical field of conveying and mixing equipment, in particular to a feeding mixing impeller unit and a feeding mixing impeller.

Background

During the preparation process of the chopped fiber reinforced composite material, fibers (solid) and resin materials (liquid) need to be uniformly mixed, and the fibers have good isotropy so as to improve the stress performance of the composite material product in all directions and reduce the problems of internal pore defects of the product and the like. Currently, conveying and mixing equipment is generally adopted to mix the fibers and the resin materials.

When the existing mixing equipment is used for mixing chopped fibers and resin materials, the isotropy of the chopped fibers is poor, the fibers are not uniformly distributed, and the mixing uniformity of the chopped fibers and the resin materials is not high, so that the internal pores of a composite material product are increased, and the local stress performance is poor. The input mixing ratio of the materials cannot be well controlled.

And the existing mixing equipment can not realize continuous input, continuous conveying and continuous output of materials, and further can not realize continuous production of required products.

Therefore, how to provide a mixing device capable of improving the isotropy of the chopped fibers and realizing the equal proportion input and output of materials is an important technical problem which needs to be solved by the technical personnel in the field at present.

Disclosure of Invention

In order to solve the technical problems, the invention provides a feeding mixing impeller unit which is used for solving the problems of improving the isotropy of chopped fibers and realizing equal-proportion input and output of materials.

In order to achieve the purpose, the invention provides the following technical scheme:

a feed mixing impeller unit comprising a base and at least one mixing tooth attached to said base; wherein the content of the first and second substances,

the base body has a rotation axis and can rotate around the rotation axis;

each mixing tooth is of a straight rod structure and is provided with an extending axis in the length direction;

each mixing tooth has a fixed end connected with the base body and a working end which is far away from the revolution axis along the radial direction and the tangential direction of the rotation direction of the base body, and the position between the extension axis of each mixing tooth and the revolution axis accords with the following relation:

the projection of the extension axis on the corresponding first projection plane and the rotation axis form an included angle of 5-17 degrees; wherein the first projection plane corresponding to each extension axis is formed by the revolution axis and a straight line which is parallel to the revolution axis and intersects with the extension axis;

the projection of the extension axis on the corresponding second projection plane forms an included angle of 15-27 degrees with the rotation axis; the second projection plane corresponding to each extension axis is intersected and vertical to the first projection plane, and the intersection line of the first projection plane and the second projection plane is the rotation axis.

The invention provides a feeding mixing impeller unit, which comprises a base body and at least one mixing tooth, wherein one end of each mixing tooth is connected with the base body, and the other end of each mixing tooth is far away from the axis of the base body along the tangential direction and the radial direction of the rotation direction of the base body; all the mixing teeth in the impeller units are arranged to form at least one group of mixing tooth groups, and the working ends of the mixing teeth in each mixing tooth group are uniformly distributed along a spiral line; when the mixing teeth of the structure are used for mixing the chopped fibers and the resin materials, the chopped fibers are favorably and fully scattered, the isotropy of the chopped fibers is improved, the propelling force can be generated to the materials in the mixing process, the materials are mixed and conveyed at the same time, the isotropy of the chopped fibers and the resin materials can be improved, and the equal proportion input and output of the materials can be realized.

Optionally, each mixing tooth is of a constant-section or variable-section structure, and the cross section is one of rectangular, trapezoidal, triangular, circular or polygonal.

Furthermore, each mixing tooth is of a uniform section structure and the cross section of each mixing tooth is rectangular;

the surface of the mixing tooth is formed with four planes, and one plane faces away from the base body and forms an included angle of 10-20 degrees with the rotation axis.

Further, the working end of at least one mixing tooth is formed with a scraping end face, wherein,

the scraping end face is a plane and forms an included angle of 0-10 degrees with the rotation axis; or the like, or, alternatively,

the scraping end face is an arc face, and an included angle between a bus of the arc face and the rotation axis is 0-10 degrees.

Further, in the extending direction of the revolution axis, the length of the portion of each mixing tooth in contact with the base body is equal to the length of the base body.

Further, in the extending direction of the revolution axis, the length of the part of each mixing tooth in contact with the base body is smaller than that of the base body, and a gap is formed between the part of each mixing tooth not in contact with the base body and the base body.

Further, at least one support rod is arranged between the part of at least one mixing tooth, which is not in contact with the base body, and two ends of each support rod are respectively connected with the corresponding mixing tooth and the base body.

Furthermore, gaps are formed among the mixing teeth provided with the supporting rods, the corresponding supporting rods and the base body.

Optionally, the substrate has an equal-section or variable-section structure, and the outer contour of the cross section of the substrate is a centrosymmetric figure.

Further, the base member is the cylinder structure, and is connected with 2 to 6 and revolves to the same the mixing tooth, 2 to 6 mixing teeth are in the circumferencial direction of base member evenly distributed.

Optionally, a through hole coaxial with the rotation axis is formed in the base body, and a key groove is formed in the inner wall of the through hole.

The invention also provides a feeding mixing impeller which comprises a plurality of feeding mixing impeller units which are sequentially and coaxially connected and provided by the technical scheme, wherein in the impeller units, the rotating directions of all mixing teeth are the same and are arranged to form at least one group of mixing tooth groups, and the working ends of the mixing teeth in each mixing tooth group are uniformly distributed along a spiral line.

Optionally, the helix in each set of mixing teeth has a lead angle of 60 ° to 80 °.

Further, in each mixed tooth group, 10 to 20 mixed teeth are provided on one lead of the helix.

Alternatively, when the working end of each mixing tooth is formed with the scraping end face, in each mixing tooth group, a distance between opposite ends between the scraping end faces of two adjacent mixing teeth on the spiral line in the arrangement direction of the plurality of impeller units is 0mm to 10 mm.

Furthermore, in every two adjacent impeller units, at least one connecting rod is arranged between at least one mixing tooth on one impeller unit and the base body of the other impeller unit; and two ends of each connecting rod are respectively connected with the corresponding mixing teeth and the base body.

Further, a gap is formed between each connecting rod and the corresponding mixing tooth and the base body.

Optionally, the impeller units are connected with a transmission shaft coaxially arranged with the impeller units, one end of the transmission shaft, which is far away from the working ends of the mixing teeth, is provided with a fan blade, and the rotating direction of the fan blade is used for forming airflow flowing to the mixing teeth.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic structural diagram of a feeding and mixing device according to an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a feed mixing impeller according to an embodiment of the present invention;

FIG. 3 is a schematic structural view of a feed impeller unit according to an embodiment of the present invention;

FIG. 4 is a schematic view of another angular configuration of the impeller unit shown in FIG. 3;

FIG. 5a is a schematic view of another angular configuration of the impeller unit shown in FIG. 3;

FIG. 5b is a schematic view of the impeller unit shown in FIG. 3 at another angle;

FIG. 6a is a schematic structural diagram of a feed impeller unit according to an embodiment of the present invention;

fig. 6b is another structural schematic diagram of the feeding impeller unit according to an embodiment of the present invention.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In order that those skilled in the art will better understand the disclosure, the invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

In practical use of the feeding mixing impeller unit provided in the embodiment of the present invention, a plurality of impeller units are required to be coaxially connected to form a mixing impeller, and the mixing impeller unit is used together with a mixing barrel sleeved outside the impeller and a driving mechanism for driving the impeller to rotate.

Referring to fig. 1, the mixing impeller provided by the embodiment of the present invention, the mixing barrel and the driving mechanism together form a mixing device, which includes a feeding mixing impeller 10, a mixing barrel 20 and a driving mechanism not shown in the figure, and as shown in fig. 2, the feeding mixing impeller includes a plurality of impeller units coaxially connected in sequence.

Referring to fig. 3, each of the impeller units 11 includes a base 111 and 3 mixing teeth 112 coupled to the base 111; wherein, the base body 111 has a rotation axis 01 and can rotate around the rotation axis 01; each mixing tooth 112 is a straight bar structure and has an axis of extension 02 in the length direction. In specific implementation, the number of the mixing teeth 112 on each impeller unit 11 is at least one, and the number of the mixing teeth 112 can be set to 1-6 according to actual use requirements; it should be noted that the rotation axis 01 and the extension axis 02 in the embodiment of the present invention are virtual reference lines provided for convenience of description of the structure of the impeller unit 11, and are not actual structures.

Referring to fig. 3, each mixing tooth 112 has a fixed end 1121 and a working end 1122, wherein the fixed end 1121 is connected to the base 111 and the working end 1122 is not in direct contact with the base 111. In the impeller unit 11 according to the embodiment of the present invention, the structural relationship between the mixing tooth 112 and the base 111 can be considered to be formed by the working end 1122 of the mixing tooth 112 moving away from the rotation axis 01 of the base 111 along two perpendicular directions, as shown in fig. 4, the working end 1122 simultaneously moves away from the rotation axis 01 along the radial direction x and the tangential direction y of the rotation direction of the base 111, so that the mixing tooth 112 having the structure shown in fig. 3 and 4 is formed, and the extension axis 02 of the mixing tooth 112 and the rotation axis 01 are non-parallel and non-intersecting non-coplanar straight lines.

For convenience of describing the position between the extension axis 02 and the rotation axis 01 of each hybrid tooth 112, referring to fig. 5a and 5B, the embodiment of the present invention adopts the projection of the extension axis 02 on two projection planes for auxiliary description, wherein, the first projection plane a corresponding to one hybrid tooth 112 shown in fig. 5a is formed by the rotation axis 01 and a straight line 03 parallel to the rotation axis 01 and intersecting with the extension axis 02 of the hybrid tooth 112, the second projection plane B corresponding to the hybrid tooth 112 shown in fig. 5B intersects with and is perpendicular to the first projection plane a, and the intersection line of the first projection plane a and the second projection plane B is the rotation axis 01. It should be noted that the first projection plane a and the second projection plane B are not actually configured.

Referring to fig. 5a, an included angle α is formed between the projection of the extension axis 02 on the first projection plane a and the rotation axis 01, referring to fig. 5B, an included angle β is formed between the projection of the extension axis 02 on the corresponding second projection plane B and the rotation axis 01, an included angle α enables each mixing tooth 112 to be outwardly expanded relative to the base 111 to generate the effect of mixing materials, and an included angle α enables each mixing tooth 112 to be inclined relative to the base 111 to generate the effect of conveying materials.

In specific implementation, the angles α and β need to be set according to parameters such as density, viscosity, setting time and the like of materials to be mixed by the mixing device, specifically, in this embodiment, when the mixing device is used for mixing and conveying foamed polyurethane and chopped glass fibers, the polyurethane is composed of organic polyisocyanate and polyhydroxy compound, the setting time is about 90 seconds, the length of the glass fiber is about 6mm, the diameter is about 13 μm, and the proportion of the glass fiber in the materials to be mixed is about 45%, in this case, the angle α is set to 12 ° and the angle β is set to 22 °, and experiments prove that the polyurethane and the glass fiber can achieve more ideal mixing uniformity, and the isotropy of the glass fiber is higher.

In specific implementation, the impeller unit 11 can be made of stainless steel, and special steel with good wear resistance is preferably selected to prolong the service life; the steel plate can be manufactured by welding, casting and integral forming, machining and the like.

In the embodiment of the present invention, as can be seen in fig. 3 and 4, each mixing tooth 112 has a uniform cross-sectional structure and a rectangular cross-section. In other alternative embodiments, the mixing tooth 112 may have a constant or varying cross-section configuration, with a cross-section that is one of rectangular, trapezoidal, triangular, circular, or polygonal. The specific structure of the mixing teeth 112 is set according to the relevant parameters of the mixed materials themselves, such as the density and viscosity of the materials.

In this embodiment, when the cross section of the mixing tooth 112 is rectangular, four planes are formed on the surface of the mixing tooth 112, and as shown in fig. 3 and 4, one of the planes faces away from the base 111 and forms an angle of 15 ° with the rotation axis 01, and experiments show that the angle can further improve the mixing and conveying efficiency of the mixing impeller. In other embodiments, the angle between the plane and the rotation axis 01 should be set according to the relevant parameters of the material itself, and specifically may be 10 ° to 20 °.

To facilitate removal of the remaining material from the inner wall of the mixing drum 20, as shown in fig. 3, a scraping end surface 1124 is formed at the working end 1122 of the mixing tooth 112, and the scraping end surface 1124 makes the working end 1122 of the mixing tooth 112 form an angle to scrape off the remaining material from the inner wall of the mixing drum 20 during rotation of the impeller. In specific implementation, the scraping end surface 1124 may be a plane or an arc surface, and the scraping end surface 1124 should be substantially parallel to the rotation axis 01 to ensure a large contact area with the residual material on the cylinder wall, thereby improving the scraping efficiency. In this embodiment, as shown in fig. 3, the scraping end surface 1124 is a plane and has an angle of 0 ° to 10 ° with the rotation axis 01. In other alternative embodiments, the scraping end surface 1124 is a curved surface, and an included angle between a generatrix of the curved surface and the rotation axis 01 is 0 ° to 10 °.

In order to ensure that the material adhered to the cylinder wall is scraped off as much as possible by the scraping end surfaces 1124, the scraping end surfaces 1124 of the mixing teeth 112 should form a surface of revolution covering the cylinder wall after rotation, and as shown in fig. 1, in each mixing tooth 112 group, the distance H between the opposite ends of the scraping end surfaces 1124 of two adjacent mixing teeth 112 on the spiral line in the arrangement direction of the impeller units 11 is 0mm to 10mm, so that the scraping end surfaces 1124 of the mixing teeth 112 form a substantially continuous surface of revolution after rotation. Meanwhile, in order to further improve the scraping efficiency, the minimum distance between each scraping end surface 1124 and the inner wall of the mixing cylinder 20 is 5mm to 10 mm.

In the embodiment of the present invention, since the mixing tooth 112 is of a rod-shaped structure, in order to ensure the connection stability of the working end 1122 of the mixing tooth 112, a supporting structure may be disposed between the part of the mixing tooth 112 not connected to the base 111 and the base 111 to support and fix the working end 1122 of the mixing tooth 112, thereby improving the stability of the working end 1122. The support structure has the following two arrangements according to different structures of the mixing tooth 112:

first, referring to fig. 6a, in the impeller unit 11a, the length L1 of the portion of each mixing tooth 112 in contact with the base 111 in the extending direction of the rotation axis 01 is equal to the length L2 of the base 111. In the impeller unit 11 with this structure, there is no space between the base 111 and the portion of the mixing tooth 112 not in contact with the base 111 to provide a support structure, and the support structure is disposed on the adjacent impeller unit 1111b, as shown in fig. 6a, a connecting rod 113 is disposed between the mixing tooth 112 on one impeller unit 11 and the base 111 of the other impeller unit 11 in the two adjacent impeller units 1111a and 11 b; both ends of each connecting rod 113 are respectively connected with the corresponding mixing tooth 112 and the base 111. Specifically, the connecting rod 113 may be made of the same material as the base 111 or the hybrid tooth 112, and may be connected to the base 111 and the hybrid tooth 112 by welding, bonding, casting, machining, or the like. The number of the connecting rods 113 between each mixing tooth 112 and the base 111 is at least one, and in the specific implementation, the number of the connecting rods can be set to be more according to the actual requirement. The connecting rod 113 functions to support the working end 1122 of the mixing tooth 112, which may improve the stability of the working end 1122. As shown in fig. 6a, a gap is formed between the connecting rod 113 and the corresponding mixing tooth 112 and the base 111, and the gap further plays a role of breaking up the materials and preventing the materials from falling too fast when the materials are mixed.

Second, referring to fig. 6b, in the extending direction of the revolution axis 01, the length L1 of the portion of each mixing tooth 112 in contact with the base 111 is smaller than the length L2 of the base 111, and there is a gap between the portion of the mixing tooth 112 not in contact with the base 111 and the base 111. The impeller unit 11 with this structure can arrange a support structure between its own mixing tooth 112 and the base 111, as shown in fig. 6b, a support rod 114 is arranged between the part of the mixing tooth 112 not contacting the base 111 and the base 111, and both ends of each support rod 114 are respectively connected with the corresponding mixing tooth 112 and the base 111. Further, a gap is formed between the mixing tooth 112 provided with the supporting rod 114 and the corresponding supporting rod 114 and the base 111. The material, number, connection, and spacing of the support rods 114 are as described above in reference to first embodiment.

Referring to fig. 3, in order to facilitate the processing of the substrate 111, in the present embodiment, the substrate 111 has a cylindrical structure. The base 111 of the cylindrical structure is connected with 3 mixing teeth 112 with the same rotation direction, and the 3 mixing teeth 112 are uniformly distributed in the circumferential direction of the base 111. In other embodiments, the number of mixing teeth 112 may be set to 2-6.

In other alternative embodiments, the base 111 may also have a uniform cross-section or a variable cross-section structure, and the outer profile of the cross-section of the base 111 is a central symmetric figure to ensure stability of the base 111 during rotation.

To achieve coaxial connection of the plurality of impeller units 11, as shown in fig. 4, the base 111 is provided with a through hole 1111 coaxial with the rotation axis 01, and the inner wall of the through hole 1111 is provided with a key groove 1112. Referring again to fig. 1 and 2, the plurality of impeller units 11 are connected by a driving shaft 12 coaxially disposed therewith, and the driving shaft 12 passes through a through hole 1111 formed in each impeller unit 11.

When a plurality of impeller units 11 are used in combination, in order to further improve the mixing and conveying efficiency of the material, as shown in fig. 1 and fig. 2, each impeller unit 11 in this embodiment is provided with 3 mixing teeth 112, in the plurality of impeller units 11, all the mixing teeth 112 have the same rotation direction and are arranged to form 3 groups of mixing teeth 112, and the mixing teeth 112 in each impeller unit 11 and the mixing teeth 112 of another adjacent impeller unit 11 are arranged in a staggered manner by a certain angle in the circumferential direction of the rotation direction of the impeller unit 11, so that the working ends 1122 of the plurality of mixing teeth 112 in each group of mixing teeth 112 are uniformly distributed along a spiral line. The mixing teeth 112 distributed along the spiral line can play a role of spiral conveying, and are beneficial to improving the mixing conveying efficiency of materials. In a specific implementation, when the key grooves are machined, the positions of the key grooves 1112 in every two adjacent impeller units 11 are staggered by a certain angle in the circumferential direction of the rotation direction of the impeller units 11, so as to ensure that the working ends 1122 of the mixing teeth 112 in each impeller unit 11 are distributed along a spiral line.

In one embodiment, the helix in each set of mixing teeth 112 has a lead angle of 60 ° to 80 °. In addition, in each group of

mixed teeth

112, 10 to 20 mixed teeth 112 are provided on one lead of the helix. The helix lead angle in this embodiment is 70 °, 14 mixing teeth 112 are provided on one lead of the helix, and experimental results prove that the mixing impeller of this structure can make polyurethane and glass fiber reach ideal mixing uniformity, and the isotropy of the glass fiber is higher, and guarantee higher conveying speed.

In the specific implementation, at least one feeding hole for feeding the material and at least one discharging hole 23 for discharging the mixed material are sequentially arranged on the mixing drum 20 along the material conveying direction, so as to facilitate the feeding and discharging of the material. In this embodiment, the mixing drum 20 is used vertically, the material conveying direction is vertical from top to bottom, and a first material inlet 21 and a second material inlet 22 are sequentially arranged on the drum wall of the mixing drum 20 along the material conveying direction; wherein the first material is a solid material or a powder material, and the second material is a fluid material; the discharge port 23 is disposed at the bottom end of the mixing barrel 20. In specific implementation, the number of the first material inlet 21 and the second material inlet 22 and the corresponding material types thereof may be set according to actual requirements.

In specific implementation, the first material inlet 21 may be used to input glass fibers, and the second material inlet 22 may be used to input liquid polyurethane, as shown in fig. 1, after the glass fibers enter the mixing cylinder 20 from the first material inlet 21, the glass fibers are fully broken by at least one impeller unit 11 in the downward movement process until the glass fibers become a state with a certain fluffiness, and then are mixed with the liquid polyurethane entering from the second material inlet 22, and the first independent inlet and the second material inlet 22 of the structure may ensure uniform mixing and equal proportion output of the two materials. The mixed material is output from a lower discharge port 23 and can enter downstream equipment such as a die.

In the practical use process, a plurality of impeller units 11 can lead to mixing drum 20 inside atmospheric pressure to be greater than the outside when rotatory, when each feed inlet input solid material or the liquid material that viscosity is lower, can lead to the material to be blown back to the feed inlet, is unfavorable for the homogeneous mixing of material. In one embodiment, an air pressure balancing mechanism is disposed inside the mixing barrel 20 on a side of the first material feeding hole 21 away from the second material feeding hole 22, and the air pressure balancing mechanism is used for forming an air flow moving along the material conveying direction to offset the air pressure generated by the impeller unit 11, so as to prevent the material from being blown back. Specifically, the air pressure balancing mechanism may be an air nozzle or a fan disposed within the mixing drum 20.

In this embodiment, referring to fig. 1 and 2, the air pressure balancing mechanism is a fan 13 and is disposed at an end of the transmission shaft 12 away from the working ends 1122 of the mixing teeth 112, and when the mixing impeller rotates, the fan 13 can simultaneously generate a downward air flow.

The feeding and mixing device provided by the invention is beneficial to fully scattering the chopped fibers when the chopped fibers and the resin material are mixed, improves the isotropy of the chopped fibers, can generate a propelling force to the materials in the mixing process, realizes the simultaneous mixing and conveying of the materials, further improves the isotropy when the chopped fibers and the resin material are mixed, and realizes the equal proportion input and output of the materials.

The feeding and mixing device provided by the invention is described in detail above. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.

Claims

1. A feed mixing impeller unit comprising a base and at least one mixing tooth attached to said base; wherein the content of the first and second substances,

the base body has a rotation axis and can rotate around the rotation axis;

2. The feed mixing impeller unit of claim 1, wherein each mixing tooth is of constant or variable cross-section configuration and has a cross-section that is one of rectangular, trapezoidal, triangular, circular, or polygonal.

3. The feed mixing impeller unit of claim 2, wherein each mixing tooth is of constant cross-sectional configuration and rectangular in cross-section;

4. The feed mixing impeller unit of claim 2, wherein the working end of at least one mixing tooth is formed with a scraping end face, wherein,

5. The feed mixing impeller unit of claim 2, wherein the length of the portion of each mixing tooth in contact with the base body in the direction of extension of the axis of rotation is equal to the length of the base body.

6. The feed mixing impeller unit of claim 2, wherein the portion of each mixing tooth in contact with the base has a length less than the length of the base in the direction of extension of the axis of rotation, and there is a gap between the portion of the mixing tooth not in contact with the base and the base.

7. The feed mixing impeller unit of claim 6, wherein at least one support bar is provided between the portion of at least one mixing tooth not in contact with the base body and the base body, and each support bar is connected at both ends to the corresponding mixing tooth and the base body, respectively.

8. The feed mixing impeller unit of claim 7, wherein a gap is formed between the mixing tooth provided with the support bar and the corresponding support bar and the base body.

9. The impeller unit as claimed in claim 1, wherein the base body has a uniform or variable cross-section structure, and the outer cross-sectional profile of the base body is a centrosymmetric pattern.

10. The feed mixing impeller unit as recited in claim 8, wherein the base body is a cylindrical structure and has 2 to 6 mixing teeth with the same rotation direction connected thereto, the 2 to 6 mixing teeth being uniformly distributed in a circumferential direction of the base body.

11. The feed mixing impeller unit of claim 1, wherein the base body is provided with a through hole coaxial with the axis of rotation, and the inner wall of the through hole is provided with a key groove.

12. A feed mixing impeller comprising a plurality of coaxially connected sequential feed mixing impeller units as claimed in any one of claims 1 to 11, wherein all mixing teeth in said plurality of impeller units have the same direction of rotation and are arranged to form at least one set of mixing tooth groups, and wherein said working ends of the plurality of mixing teeth in each set of mixing teeth are uniformly distributed along a helix.

13. The impeller of claim 12, wherein the helix in each set of mixing teeth has a lead angle of 60 ° to 80 °.

14. The impeller of claim 13, wherein each set of mixing teeth has between 10 and 20 mixing teeth on a lead of the helix.

15. The impeller according to claim 12, wherein when the working end of each mixing tooth is formed with the scraping end face, in each mixing tooth group, a distance between opposite ends of two adjacent mixing teeth on a spiral line in the arrangement direction of the impeller units is 0mm to 10 mm.

16. The impeller of claim 12, wherein at least one connecting rod is provided between at least one mixing tooth of one impeller unit and the base body of the other impeller unit in every two adjacent impeller units; and two ends of each connecting rod are respectively connected with the corresponding mixing teeth and the base body.

17. The impeller of claim 16, wherein a gap is formed between each connecting rod and the corresponding mixing tooth and the base.

18. The impeller of claim 12, wherein the impeller units are connected by a drive shaft coaxially disposed therewith, the drive shaft having a fan blade at an end thereof remote from the working ends of the mixing teeth, the fan blade having a direction of rotation for creating an air flow to the mixing teeth.