Metal casting stirring blade with multiple stirring structures

Abstract

The utility model discloses a kind of metal casting mud leaves with multiple stirring structure, it is related to stirring blade technical field.The utility model includes stirring shaft, still including coaxially fixed connection on the main stirring helical blade and vice stirring helical blade of stirring shaft;The rotation direction of the main stirring helical blade and vice stirring helical blade is opposite;The surface of the main stirring helical blade is equipped with the guide groove for guiding material to produce secondary flow;The edge of the vice stirring helical blade is equipped with the gap for cutting off material, the middle part of the vice stirring helical blade is equipped with a plurality of turbulence holes, the top and tail of the vice stirring helical blade are respectively equipped with a plurality of stirring teeth mouth, the pitch of the vice stirring helical blade is the variable pitch structure that gradually shrinks from feed end to discharge end.The utility model is through the main stirring helical blade and vice stirring helical blade, solved the problem that conventional blade structure is difficult to realize fast, low energy consumption's high quality stirring under complex working condition.

Description

Technical Field

[0001] This utility model relates to the field of stirring blade technology, and in particular to a metal cast mud stirring blade with multiple stirring structures. Background Technology

[0002] In many industrial sectors such as construction, chemical engineering, metallurgy, and environmental protection, there is a widespread need for efficient mixing, stirring, and conveying of powdery, granular, or slurry materials. Among these, the spiral mixer, as a core component of mixing equipment, directly determines the mixing quality, efficiency, and energy consumption through its structural design. Common mixing blades often employ a single-direction, equal-pitch spiral structure, and their working principle primarily relies on the axial thrust and radial shearing action generated by the blade rotation.

[0003] Conventional blade structures are poorly adaptable to materials and cannot simultaneously achieve efficient axial conveying, strong radial mixing, and the function of breaking up agglomerated materials. Although some improved designs with the addition of auxiliary blades or changes in blade shape have appeared on the market, their structures are often relatively simple and the synergy between the functional components is not strong, making it difficult to achieve fast, low-energy, and high-quality mixing under complex working conditions. Summary of the Invention

[0004] The purpose of this invention is to provide a metal cast mud agitator blade with multiple stirring structures, thereby solving the problem that conventional blade structures are difficult to achieve rapid, low-energy, and high-quality stirring under complex working conditions.

[0005] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution: This utility model is a metal cast mud-stirring blade with multiple stirring structures, including a stirring shaft, and a main stirring spiral blade and a secondary stirring spiral blade coaxially and fixedly connected to the stirring shaft. The main stirring spiral blades and the auxiliary stirring spiral blades rotate in opposite directions; The surface of the main stirring spiral blades is provided with flow-guiding grooves for guiding materials to generate secondary flows; The edge of the auxiliary stirring spiral blade is provided with a notch for cutting off the material, the middle of the auxiliary stirring spiral blade is provided with a few turbulence holes, the top and tail of the auxiliary stirring spiral blade are respectively provided with a plurality of stirring teeth, and the pitch of the auxiliary stirring spiral blade is a variable pitch structure that gradually decreases from the feed end to the discharge end.

[0006] As a preferred embodiment of this utility model, the main stirring spiral blade and the auxiliary stirring spiral blade are alternately arranged along the stirring shaft axis, with their installation phase angles differing by 60° to 180°, and the diameter of the main stirring spiral blade is larger than that of the auxiliary stirring spiral blade.

[0007] As a preferred embodiment of this utility model, the thickness of the main stirring spiral blade and the auxiliary stirring spiral blade gradually decreases from their respective connection points with the stirring shaft towards their respective outer edges.

[0008] As a preferred technical solution of this utility model, the flow guiding groove includes a first flow dividing groove and a second flow dividing groove. The tail ends of the first flow dividing groove and the second flow dividing groove meet and extend in different directions from the meeting point.

[0009] As a preferred embodiment of this invention, the notch is V-shaped and evenly distributed along the edge of the blade.

[0010] As a preferred technical solution of this utility model, the turbulence hole includes, in sequence, a converging section, a narrow section and a expanding section along the material flow direction. The cross-section of the converging section gradually decreases along the material flow direction, the cross-section of the narrow section maintains a constant minimum flow area, and the cross-section of the expanding section gradually increases along the material flow direction.

[0011] As a preferred embodiment of this utility model, a turbulence-inducing secondary blade is fixedly connected to the secondary stirring spiral blade, and the turbulence-inducing secondary blade is located behind the turbulence-inducing hole.

[0012] This utility model has the following beneficial effects: (i) This utility model uses main stirring spiral blades and secondary stirring spiral blades with opposite rotation directions, different diameters and phase angle differences to alternately arrange, forming strong dynamic resistance and three-dimensional turbulence in the stirring chamber; combined with the flow guide grooves on the surface of the main blades, it can actively divide and guide the generation of multi-directional secondary flow, effectively breaking the laminar flow of materials, eliminating the stirring dead angle, and thus improving the macroscopic and microscopic mixing uniformity.

[0013] (II) This utility model can continuously cut and tear materials through the V-shaped notches evenly distributed on the edge of the auxiliary stirring spiral blades. The gradually narrowing-expanding turbulence holes in the middle can generate periodic compression, shearing and vortex on the passing materials. In addition, the continuous extrusion provided by the variable pitch structure and the secondary cutting effect of the rear turbulence auxiliary blades together achieve efficient crushing and fine dispersion of agglomerated materials.

[0014] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the structure of a metal cast mud agitator blade with multiple stirring structures according to the present invention; Figure 2 This is a schematic diagram of the structure of the main stirring spiral blade of this utility model; Figure 3 This is a schematic diagram of the structure of the auxiliary stirring spiral blade of this utility model; Figure 4 This is a schematic diagram of the secondary stirring spiral blade of this utility model in another direction.

[0017] The attached diagram lists the components represented by each number as follows: 1. Stirring shaft; 2. Main stirring spiral blade; 3. Secondary stirring spiral blade; 21. Guide groove; 211. First flow divider; 212. Second flow divider; 31. Notch; 32. Stirring tooth; 33. Turbulence hole; 331. Gradual narrowing section; 332. Narrow section; 333. Gradual widening section; 34. Turbulence secondary blade. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0019] In the description of this utility model, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inner", "around" and other terms indicating orientation or positional relationship are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0020] Please see Figures 1 to 4 As shown, this utility model is a metal cast mud-stirring blade with multiple stirring structures, including a stirring shaft 1, and a main stirring spiral blade 2 and a secondary stirring spiral blade 3 coaxially fixedly connected to the stirring shaft 1. The main stirring spiral blade 2 and the auxiliary stirring spiral blade 3 rotate in opposite directions; The surface of the main stirring spiral blade 2 is provided with a flow guide groove 21 for guiding the material to generate a secondary flow; The auxiliary stirring spiral blade 3 has a notch 31 on its edge for cutting off the material, a few interference flow holes 33 in the middle of the auxiliary stirring spiral blade 3, and multiple stirring teeth 32 at the top and tail of the auxiliary stirring spiral blade 3. The pitch of the auxiliary stirring spiral blade 3 is a variable pitch structure that gradually decreases from the feed end to the discharge end.

[0021] During operation, the metal cast agitator blades are driven by the stirring shaft 1 to rotate synchronously with the main and auxiliary stirring spiral blades 3. The main stirring spiral blade 2 provides the main axial pushing force with its rotation direction, and the flow guide grooves 21 on its surface divide and guide the mainstream material during the pushing process to generate complex secondary flows, enhancing radial and circumferential mixing. The auxiliary stirring spiral blades 3, rotating in the opposite direction, generate reverse stirring and resistance. The notches 31 on its edges can effectively cut fibers and agglomerates. The multiple stirring teeth 32 at the top and tail form a continuous toothed structure at the edge of the blades. These stirring teeth 32 can further tear and break up the flowing material agglomerates and generate high-frequency local turbulence in the circumferential direction, which complements the macroscopic cutting effect of the notches 31 and the flow disturbance of the turbulence holes 33, enhancing the overall dispersion and refinement of the material by the blades. The turbulence holes 33 in the middle cause eddies and sudden velocity changes when the material passes through, while the variable pitch structure that gradually narrows from the feed end to the discharge end forms continuous compression and shearing on the material. The synergistic effect of the various structures ultimately achieves a unified approach of efficient axial conveying, intense three-dimensional mixing, and efficient agglomeration, thereby achieving a rapid, uniform, and relatively low-energy-consumption mixing effect under complex working conditions.

[0022] Please see Figures 1 to 2 As shown, the main stirring spiral blade 2 and the auxiliary stirring spiral blade 3 are alternately arranged along the stirring shaft 1, and the installation phase angles of the two differ by 60° to 180°. The diameter of the main stirring spiral blade 2 is larger than the diameter of the auxiliary stirring spiral blade 3.

[0023] This structure alternates between main stirring spiral blades 2 and auxiliary stirring spiral blades 3, which rotate in opposite directions, have different diameters, and have a phase angle difference, so that the two form a continuous dynamic confrontation when rotating. The main stirring spiral blade 2 is responsible for axial pushing, while the auxiliary stirring spiral blade 3 intercepts and shears from the side, thereby generating strong three-dimensional turbulence in the mixing chamber. Its core function is to achieve all-round and efficient mixing of materials, eliminate mixing dead zones, and improve the ability to break up agglomerated materials.

[0024] Please see Figures 1 to 4 As shown, the thickness of the main stirring spiral blade 2 and the auxiliary stirring spiral blade 3 gradually decreases from their respective connection points with the stirring shaft 1 towards their respective outer edges.

[0025] Both the main stirring spiral blade 2 and the auxiliary stirring spiral blade 3 adopt a wedge-shaped cross-section design with a thick root and a thin outer edge. While ensuring connection strength and preventing breakage, this design effectively reduces rotational resistance and energy consumption. At the same time, the thinner outer edge can more sharply shear materials and reduce adhesion, thereby improving mixing efficiency and economy while ensuring reliability.

[0026] Please see Figures 1 to 2 As shown, the flow guide groove 21 includes a first flow divider 211 and a second flow divider 212. The tail ends of the first flow divider 211 and the second flow divider 212 meet and extend in different directions from the meeting point.

[0027] During operation, as the main stirring spiral blades 2 rotate and push the material, the material flowing over their surface enters the guide grooves 21. When the material flows to the confluence of the first diversion groove 211 and the second diversion groove 212, the single stream is forcibly separated and then moves along two channels with different extension directions. This process actively creates multiple secondary flows with different directions in the main conveying direction. Its core function is to significantly enhance the diffusion and mixing of materials in the radial and circumferential directions, break the laminar flow, and form a more complex three-dimensional turbulent structure, thereby greatly improving the microscopic uniformity and efficiency of mixing.

[0028] Please see Figure 1 and Figures 3 to 4 As shown, notch 31 is V-shaped and evenly distributed along the edge of the blade.

[0029] During operation, as the auxiliary stirring spiral blade 3 rotates, the V-shaped notches 31 evenly distributed on its edge act like continuous cutting teeth. When the material flows over the edge of the blade, agglomerated or long fibrous materials are first pierced and positioned by the V-shaped tips. Then, under the continuous rotational propulsion of the blade, they are rapidly sheared and torn by the inclined cutting edges on both sides of the notches 31. Its function is to decompose the macroscopic cutting action into a large number of continuous and uniform microscopic shearings, which enhances the crushing ability and dispersion efficiency of agglomerated and entangled materials. At the same time, it avoids the uniform adhesion or overall slippage of materials on the edge of the blade, ensuring the continuity and stability of the cutting effect.

[0030] Please see Figure 1 and Figures 3 to 4 As shown, the turbulence hole 33 includes, in sequence along the material flow direction, a converging section 331, a narrow section 332, and a expanding section 333. The cross-section of the converging section 331 gradually decreases along the material flow direction, the cross-section of the narrow section 332 maintains a constant minimum flow area, and the cross-section of the expanding section 333 gradually expands along the material flow direction.

[0031] During operation, when the material passes through the turbulence hole 33 under the push of the auxiliary stirring spiral blade 3, it is first gathered and accelerated by the converging section 331, forming a high-velocity jet. Subsequently, the jet maintains a high velocity in the narrow section 332, generating a shearing effect. Finally, when it enters the expanding section 333, the flow velocity drops sharply and the flow channel expands abruptly, resulting in pressure changes and generating violent vortices and turbulence. The core function of this series of continuous changes is to implement a periodic pumping effect of first compressing and accelerating the material and then expanding and releasing it. This not only effectively breaks up particle agglomerates but also stimulates a large number of irregular micro-turbulences in the macro-flow, enhancing the interlayer mixing and diffusion of materials, thereby improving the fineness and uniformity of the mixture.

[0032] Please see Figure 1 and Figures 3 to 4 As shown, a turbulence-inducing secondary blade 34 is fixedly connected to the secondary stirring spiral blade 3, and the turbulence-inducing secondary blade 34 is located behind the turbulence-inducing hole 33.

[0033] During operation, the material is accelerated, sheared and ejected in a vortex after passing through the front turbulence hole 33, and then impacts the fixed turbulence sub-blade 34 located at the rear. This blade has a forced interception, blocking and secondary cutting effect on this turbulent high-speed material flow. Its function is to further split and redirect the material clumps and vortices that have been initially dispersed, thereby improving the fineness and uniformity of the mixing.

[0034] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0035] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A metal cast mud-stirring blade with multiple stirring structures, comprising a stirring shaft (1), characterized in that, It also includes a main stirring spiral blade (2) and a secondary stirring spiral blade (3) that are coaxially fixedly connected to the stirring shaft (1). The main stirring spiral blade (2) rotates in the opposite direction to the auxiliary stirring spiral blade (3); The surface of the main stirring spiral blade (2) is provided with a flow guide groove (21) for guiding the material to generate a secondary flow. The edge of the auxiliary stirring spiral blade (3) is provided with a notch (31) for cutting off the material. The top and tail of the auxiliary stirring spiral blade (3) are respectively provided with multiple stirring teeth (32). The middle part of the auxiliary stirring spiral blade (3) is provided with a few interference flow holes (33). The pitch of the auxiliary stirring spiral blade (3) is a variable pitch structure that gradually shrinks from the feed end to the discharge end.

2. The metal cast mud impeller with multiple stirring structures according to claim 1, characterized in that, The main stirring spiral blade (2) and the auxiliary stirring spiral blade (3) are alternately arranged along the axial direction of the stirring shaft (1), and the installation phase angles of the two are 60° to 180° apart. The diameter of the main stirring spiral blade (2) is larger than the diameter of the auxiliary stirring spiral blade (3).

3. A metal cast mud impeller with multiple stirring structures according to claim 1 or 2, characterized in that, The thickness of the main stirring spiral blade (2) and the auxiliary stirring spiral blade (3) gradually decreases from their respective connection points with the stirring shaft (1) toward their respective outer edges.

4. A metal cast mud impeller with multiple stirring structures according to claim 1 or 2, characterized in that, The flow guide groove (21) includes a first flow divider (211) and a second flow divider (212). The tail ends of the first flow divider (211) and the second flow divider (212) meet and extend in different directions from the meeting point.

5. A metal cast mud impeller with multiple stirring structures according to claim 1, characterized in that, The notch (31) is V-shaped and is evenly distributed along the edge of the blade.

6. A metal cast mud impeller with multiple stirring structures according to claim 1, characterized in that, The turbulence hole (33) includes, in sequence, a tapering section (331), a narrow section (332), and a widening section (333) connected along the material flow direction. The cross-section of the tapering section (331) gradually decreases along the material flow direction, the cross-section of the narrow section (332) maintains a constant minimum flow area, and the cross-section of the widening section (333) gradually increases along the material flow direction.

7. A metal cast mud impeller with multiple stirring structures according to claim 6, characterized in that, The auxiliary stirring spiral blade (3) is fixedly connected to a turbulence auxiliary blade, and the turbulence auxiliary blade is located behind the turbulence hole (33).

Images