An agitator impeller suitable for mixing fluids with wide viscosity range
By designing a three-layer impeller structure and combined blades suitable for fluids with wide viscosity, the problem of low mixing efficiency between Newtonian and non-Newtonian fluids was solved, achieving efficient and low-energy fluid mixing.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- TIANJIN TIANDI CHUANGZHI TECH DEV
- Filing Date
- 2025-03-31
- Publication Date
- 2026-05-26
AI Technical Summary
Existing stirring impellers are difficult to efficiently mix Newtonian and non-Newtonian fluids, especially in a wide viscosity range where they cannot provide appropriate shear force and flow patterns, resulting in low mixing efficiency and high energy consumption.
Design a stirring impeller suitable for mixing fluids with wide viscosity. It adopts a three-layer impeller structure with upper, middle and lower layers, which are evenly distributed in the circumference. Combined with axial flow impeller, F-type impeller and folding blade impeller, it provides radial and axial stirring action. The blade arrangement and size ratio are optimized and it is suitable for both Newtonian and non-Newtonian fluids.
It improves the uniformity and efficiency of fluid mixing, reduces dead zones, and lowers energy consumption, making it particularly suitable for the efficient mixing of fluids with different viscosities.
Smart Images
Figure CN224270804U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a stirring impeller suitable for mixing fluids with wide viscosity, belonging to the field of fluid engineering technology. Background Technology
[0002] In many industrial processes, especially in chemical, pharmaceutical, food, and petroleum processing, the viscosity of materials within reactors can rise from a few centipoises to tens or even hundreds of thousands of centipoises during the reaction. Maintaining efficient mass and heat transfer within such a wide viscosity range necessitates the exploration of novel, highly efficient stirring impellers. Fluids include Newtonian and non-Newtonian fluids, which exhibit different properties during flow and mixing. The viscosity of Newtonian fluids is directly proportional to the shear rate, while non-Newtonian fluids exhibit more complex flow behavior, with their viscosity varying depending on factors such as shear rate and shear mode.
[0003] Mixing Newtonian and non-Newtonian fluids often presents numerous challenges. For Newtonian fluids, common impellers can provide sufficient shear force and turbulence to promote homogeneous mixing. However, for non-Newtonian fluids, their viscosity varies greatly, and shear force is difficult to control. Therefore, traditional impellers often cannot meet the requirements for efficient mixing. Mixing non-Newtonian fluids requires specially designed impellers to overcome their nonlinear flow characteristics and achieve more efficient mixing results.
[0004] Therefore, it is necessary to design a new type of stirring impeller suitable for mixing fluids with wide viscosity, which can be used for efficient mixing of Newtonian and non-Newtonian fluids. At the same time, it can provide appropriate shear force and flow mode for the different characteristics of the two types of fluids, which can not only improve mixing efficiency, but also avoid excessive shear or dead zone, optimize energy consumption and mixing time in the production process, thereby meeting the demand for high efficiency in manufacturing. Utility Model Content
[0005] Therefore, the purpose of this invention is to provide a stirring impeller suitable for mixing fluids with a wide viscosity range, which can efficiently mix Newtonian and non-Newtonian fluids.
[0006] To achieve the above objectives, this utility model provides a stirring impeller suitable for mixing fluids with wide viscosity, comprising a hub, an axial flow impeller, an F-type impeller, and a folding blade impeller; the axial flow impeller includes an upper axial flow impeller, a middle axial flow impeller, and a lower axial flow impeller; the F-type impeller includes an upper F-type impeller; an upper axial flow impeller is fixedly installed on one side of the upper layer of the hub, and an upper F-type impeller is symmetrically installed on the other side; the folding blade impeller includes a middle folding blade impeller and a lower folding blade impeller; a middle folding blade impeller is fixedly installed on one side of the middle layer of the hub, and a middle axial flow impeller is symmetrically installed on the other side; a lower folding blade impeller is fixedly installed on one side of the lower layer of the hub, and a lower axial flow impeller is symmetrically installed on the other side.
[0007] The impeller is divided into three layers along the hub height direction: upper, middle, and lower. The three layers of impellers are at the same height (except for the F-type impeller). The three layers of impellers are evenly distributed in the circumferential direction, which can provide radial and axial stirring effects simultaneously.
[0008] The blades of the axial-flow propeller are either planar blades (with the same root angle and tip angle) or curved blades (with different root angles and tip angles) that are at a certain angle to the axial direction.
[0009] The folding angle of the folding blade is β, where 0 < β < 90°, and the relationship between the folding blade length l and the straight blade length L is: L / l = 5~2.
[0010] The relationship between the blade height H and the total blade height Hz of the F-type propeller is: Hz / H = 2.3~2.6. The relationship between the upper width B and the lower width b of the blade of the F-type propeller is: B / b = 2~2.5. The relationship between the total blade height H and the height of the width b portion of the F-type propeller is: H / h = 2~3, h / h1 = 2~2.5.
[0011] An impeller suitable for mixing fluids with wide viscosity includes a hub, an axial flow impeller, an F-type impeller, and a folding blade impeller; the axial flow impeller includes an upper axial flow impeller, a middle axial flow impeller, and a lower axial flow impeller; the F-type impeller includes an upper F-type impeller and a middle F-type impeller; an upper axial flow impeller is fixedly installed on one side of the upper hub, and an upper F-type impeller is symmetrically installed on the other side; a middle F-type impeller is fixedly installed on one side of the middle hub, and a middle axial flow impeller is symmetrically installed on the other side; the folding blade impeller includes a lower folding blade impeller; a lower folding blade impeller is fixedly installed on one side of the lower hub, and a lower axial flow impeller is symmetrically installed on the other side.
[0012] The impeller is divided into three layers along the hub height direction: upper, middle, and lower. The three layers of impellers are at the same height (except for the F-type impeller). The three layers of impellers are evenly distributed in the circumferential direction, which can provide radial and axial stirring effects simultaneously.
[0013] The blades of the axial-flow propeller are either planar blades (with the same root angle and tip angle) or curved blades (with different root angles and tip angles) that are at a certain angle to the axial direction.
[0014] The folding angle of the folding blade is β, where 0 < β < 90°, and the relationship between the folding blade length l and the straight blade length L is: L / l = 5~2.
[0015] The relationship between the blade height H and the total blade height Hz of the F-type propeller is: Hz / H = 2.3~2.6. The relationship between the upper width B and the lower width b of the blade of the F-type propeller is: B / b = 2~2.5. The relationship between the total blade height H and the height of the width b portion of the F-type propeller is: H / h = 2~3, h / h1 = 2~2.5.
[0016] By employing the above technical solution, this utility model provides an impeller suitable for mixing fluids with wide viscosity ranges. Through a three-layer impeller structure (upper, middle, and lower layers) evenly distributed circumferentially, it not only provides radial and axial stirring but also reduces fluid dead zones, improves overall fluid circulation efficiency, and makes mixing more uniform. Furthermore, through the combination of axial-flow impellers, F-type impellers, and folding impellers, this impeller can be used for mixing both Newtonian and non-Newtonian fluids. The axial-flow impeller provides the primary axial flow, the F-type impeller enhances radial stirring and axial mixing, and the folding impeller increases local shearing and radial dispersion, enabling faster and more uniform mixing of fluids with different viscosities. In addition, through a reasonable blade arrangement and optimized size ratio, this impeller can reduce low-flow regions during stirring, making the entire mixing system more efficient, particularly suitable for mixing fluids of different viscosities and non-Newtonian fluids. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of this utility model.
[0018] Figure 2 This is a top view of the structure of Embodiment 1 of this utility model.
[0019] Figure 3 This is a schematic diagram of the blade proportions in Embodiment 1 of this utility model.
[0020] Figure 4 This is a schematic diagram of the structure of Embodiment 2 of this utility model.
[0021] Figure 5 This is a top view of the structure of Embodiment 2 of this utility model.
[0022] Figure 6 This is a schematic diagram of the blade proportions in Embodiment 2 of this utility model. Detailed Implementation
[0023] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.
[0024] Example 1:
[0025] As shown in Figures 1-4, this utility model discloses a stirring impeller suitable for mixing fluids with wide viscosity, comprising a hub 3, an axial flow impeller, an F-type impeller, and a folding impeller. The axial flow impeller includes an upper axial flow impeller 1-2, a middle axial flow impeller 2-1, and a lower axial flow impeller 3-2. The F-type impeller includes an upper F-type impeller 1-1. The upper axial flow impeller 1-2 is fixedly installed on one side of the upper layer of the hub 3, and the upper F-type impeller 1-1 is symmetrically installed on the other side. The folding impeller includes a middle folding impeller 2-2 and a lower folding impeller 3-1. The middle folding impeller 2-2 is fixedly installed on one side of the middle layer of the hub 3, and the middle axial flow impeller 2-1 is symmetrically installed on the other side. The lower folding impeller 3-1 is fixedly installed on one side of the lower layer of the hub 3, and the lower axial flow impeller 3-2 is symmetrically installed on the other side. Through the combination of the axial flow impeller, the F-type impeller, and the folding impeller, this stirring impeller can be used for mixing both Newtonian and non-Newtonian fluids.
[0026] Axial flow propellers provide strong axial flow, enhance fluid circulation, and improve overall mixing uniformity.
[0027] Folded blades increase shearing and radial dispersion through their angled design, which helps handle high-viscosity or non-Newtonian fluids and improves local mixing capabilities.
[0028] The F-type propeller provides additional radial and axial turbulence effects, improving the flow field distribution and enhancing the mixing effect.
[0029] The stirring impeller is divided into upper, middle and lower layers along the height direction of the hub 3. The upper, middle and lower layers of impellers are at the same height (except for the F-type impeller). The upper, middle and lower layers of impellers are evenly distributed in the circumferential direction, which can provide radial and axial stirring effects at the same time, to enhance fluid circulation, reduce mixing dead zones, and improve stirring efficiency. It is especially suitable for efficient mixing of fluids with different viscosities.
[0030] The axial flow propeller blades are either planar blades at a certain angle to the axial direction (with the same root angle and tip angle) or curved blades at a certain angle to the axial direction (with different root and tip angles). Planar blades provide more uniform shear force, making them suitable for low-viscosity fluids. They offer stable thrust and flow patterns, improving mixing efficiency. Curved blades have optimized shear force distribution, allowing for different flow states in different areas of the blades. They are suitable for high-viscosity or non-Newtonian fluids, reducing energy loss due to excessive shearing and improving energy efficiency.
[0031] The folding blade angle of the blade is β, where 0 < β < 90°. The relationship between the folding blade length l and the straight blade length L is L / l = 5~2, which is used to optimize the matching of shear and thrust and improve energy utilization.
[0032] The relationship between the blade height H and the total blade height Hz of the F-type propeller is: Hz / H = 2.3~2.6. The relationship between the upper width B and the lower width b of the F-type propeller blade is: B / b = 2~2.5. The relationship between the total blade height H and the height of the width b portion of the F-type propeller blade is: H / h = 2~3, h / h1 = 2~2.5. This is used to enhance the turbulence effect and improve the stirring ability of the fluid.
[0033] During mixing, impellers 1-2, 2-1, and 3-2 propel the fluid to generate axial up-and-down circulating flow, while impellers 1-1, 2-2, and 3-1 propel the fluid outward along the impeller radius. Through the synergistic effect of radial and axial flow, the axial flow dominates the up-and-down circulation, while the radial flow enhances local shear. The superposition of the two forms a complex spiral or vortex flow pattern, improving mixing uniformity and forming a highly efficient three-dimensional composite flow pattern that combines high shear and strong circulation characteristics.
[0034] Preferably, the impeller design in this embodiment can provide greater shear force and greater dispersion and refinement capability for the stirred liquid. It is not only suitable for solid-liquid suspension and crystallization systems, but also for liquid-liquid dispersion and gas-liquid mass transfer processes that allow gas to be drawn from the liquid surface. It is also suitable for viscoelastic fluids that exhibit "pole climbing" phenomenon during stirring, and to a certain extent, it suppresses the "pole climbing" effect of viscoelastic fluids.
[0035] In this embodiment, the blades effectively disperse liquid-liquid, solid-liquid, and gas-liquid systems across a wide viscosity range (0-10). 5 This technology enables the mixing, mass transfer, and heat transfer of Newtonian and non-Newtonian fluids at concentrations of mPa·s, characterized by low energy consumption and high efficiency. It requires less power than commonly used agitators to achieve the same stirring effect. Due to its highly efficient three-dimensional composite flow pattern, wide applicability to various viscosity ranges and systems, simple structure, and low processing difficulty, it has a very broad application prospect in practical industrial production.
[0036] By employing the above technical solution, this utility model provides an impeller suitable for mixing fluids with wide viscosity ranges. Through a three-layer impeller structure (upper, middle, and lower layers) evenly distributed circumferentially, it not only provides radial and axial stirring but also reduces fluid dead zones, improves overall fluid circulation efficiency, and makes mixing more uniform. Furthermore, through the combination of axial-flow impellers, F-type impellers, and folding impellers, this impeller can be used for mixing both Newtonian and non-Newtonian fluids. The axial-flow impeller provides the primary axial flow, the F-type impeller enhances radial stirring and axial mixing, and the folding impeller increases local shearing and radial dispersion, enabling faster and more uniform mixing of fluids with different viscosities. In addition, through a reasonable blade arrangement and optimized size ratio, this impeller can reduce low-flow regions during stirring, making the entire mixing system more efficient, especially suitable for mixing high-viscosity and non-Newtonian fluids.
[0037] Example 2:
[0038] like Figure 5-6 As shown, a stirring impeller suitable for mixing fluids with wide viscosity includes a hub 3, an axial flow impeller, an F-type impeller, and a folding blade impeller; the axial flow impeller includes an upper axial flow impeller 1-2, a middle axial flow impeller 2-1, and a lower axial flow impeller 3-2; the F-type impeller includes an upper F-type impeller 1-1 and a middle F-type impeller 2-3; the upper axial flow impeller 1-2 is fixedly installed on one side of the upper layer of the hub 3, and the upper F-type impeller 1-1 is symmetrically installed on the other side; the middle F-type impeller 2-3 is fixedly installed on one side of the middle layer of the hub 3, and the middle axial flow impeller 2-1 is symmetrically installed on the other side; the folding blade impeller includes a lower folding blade impeller 3-1; the lower folding blade impeller 3-1 is fixedly installed on one side of the lower layer of the hub 3, and the lower axial flow impeller 3-2 is symmetrically installed on the other side.
[0039] Axial flow propellers provide strong axial flow, enhance fluid circulation, and improve overall mixing uniformity.
[0040] Folded blades increase shearing and radial diffusion through their angled design, which helps to handle high-viscosity or non-Newtonian fluids and improves local mixing capabilities.
[0041] The F-type propeller provides additional radial and axial turbulence effects, improving the flow field distribution and enhancing the mixing effect.
[0042] The stirring impeller is divided into upper, middle and lower layers along the height direction of the hub 3. The upper, middle and lower layers of impellers are at the same height (except for the F-type impeller). The upper, middle and lower layers of impellers are evenly distributed in the circumferential direction, which can provide radial and axial stirring effects at the same time, to enhance fluid circulation, reduce mixing dead zones, and improve stirring efficiency. It is especially suitable for efficient mixing of fluids with different viscosities.
[0043] The axial flow propeller blades are either planar blades at a certain angle to the axial direction (with the same root angle and tip angle) or curved blades at a certain angle to the axial direction (with different root and tip angles). Planar blades provide more uniform shear force, making them suitable for low-viscosity fluids. They offer stable thrust and flow patterns, improving mixing efficiency. Curved blades have optimized shear force distribution, allowing for different flow states in different areas of the blades. They are suitable for high-viscosity or non-Newtonian fluids, reducing energy loss due to excessive shearing and improving energy efficiency.
[0044] The folding blade angle of the blade is β, where 0 < β < 90°. The relationship between the folding blade length l and the straight blade length L is L / l = 5~2, which is used to optimize the matching of shear and thrust and improve energy utilization.
[0045] The relationship between the blade height H and the total blade height Hz of the F-type propeller is: Hz / H = 2.3~2.6. The relationship between the upper width B and the lower width b of the F-type propeller blade is: B / b = 2~2.5. The relationship between the total blade height H and the height of the width b portion of the F-type propeller blade is: H / h = 2~3, h / h1 = 2~2.5. This is used to enhance the turbulence effect and improve the stirring ability of the fluid.
[0046] By adopting the above technical solution, the present invention provides a stirring impeller suitable for mixing fluids with wide viscosity. Through reasonable blade arrangement and optimized size ratio, the stirring impeller can reduce the low flow area of the fluid during the stirring process, making the entire mixing system more efficient. It is particularly suitable for mixing medium and low viscosity and non-Newtonian fluids.
[0047] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.
Claims
1. A mixing impeller suitable for mixing of fluids having a wide range of viscosities, characterized in that: It includes a hub, an axial-flow propeller, an F-type propeller, and a folding blade propeller; the axial-flow propeller includes an upper axial-flow propeller, a middle axial-flow propeller, and a lower axial-flow propeller; the F-type propeller includes an upper F-type propeller; an upper axial-flow propeller is fixedly installed on one side of the upper hub, and an upper F-type propeller is symmetrically installed on the other side; the folding blade propeller includes a middle folding blade propeller and a lower folding blade propeller; a middle folding blade propeller is fixedly installed on one side of the middle hub, and a middle axial-flow propeller is symmetrically installed on the other side; a lower folding blade propeller is fixedly installed on one side of the lower hub, and a lower axial-flow propeller is symmetrically installed on the other side.
2. The stirring impeller suitable for mixing fluids with wide viscosity as described in claim 1, characterized in that: The stirring impeller is divided into upper, middle and lower layers along the hub height direction. Except for the F-type impeller, the upper, middle and lower layers of impellers are at the same height. The upper, middle and lower layers of impellers are evenly distributed in the circumferential direction, which can provide radial and axial stirring effects at the same time.
3. The stirring impeller suitable for mixing fluids with wide viscosity as described in claim 1, characterized in that: The blades of the axial flow propeller are planar blades at a certain angle to the axial direction, and the root angle and tip angle of the blades are the same. Alternatively, the blades of the axial flow propeller are curved blades at a certain angle to the axial direction, and the root angle and tip angle of the blades are different.
4. The stirring impeller suitable for mixing fluids with wide viscosity as described in claim 1, characterized in that: The folding angle of the folding blade is β, where 0 < β < 90°, and the relationship between the folding blade length l and the straight blade length L is: L / l = 5~2.
5. The stirring impeller suitable for mixing fluids with wide viscosity as described in claim 1, characterized in that: The relationship between the blade height H and the total blade height Hz of the F-type propeller is: Hz / H = 2.3~2.
6. The relationship between the upper width B and the lower width b of the blade of the F-type propeller is: B / b = 2~2.
5. The relationship between the total blade height H and the height of the width b portion of the F-type propeller is: H / h = 2~3, h / h1 = 2~2.
5.
6. A stirring impeller suitable for mixing fluids of wide viscosity, characterized in that: It includes a hub, an axial-flow propeller, an F-type propeller, and a folding blade propeller; the axial-flow propeller includes an upper axial-flow propeller, a middle axial-flow propeller, and a lower axial-flow propeller; the F-type propeller includes an upper F-type propeller and a middle F-type propeller; an upper axial-flow propeller is fixedly installed on one side of the upper hub, and an upper F-type propeller is symmetrically installed on the other side; a middle F-type propeller is fixedly installed on one side of the middle hub, and a middle axial-flow propeller is symmetrically installed on the other side; the folding blade propeller includes a lower folding blade propeller; a lower folding blade propeller is fixedly installed on one side of the lower hub, and a lower axial-flow propeller is symmetrically installed on the other side.
7. The stirring impeller suitable for mixing fluids with wide viscosity as described in claim 6, characterized in that: The stirring impeller is divided into upper, middle and lower layers along the hub height direction. Except for the F-type impeller, the upper, middle and lower layers of impellers are at the same height. The upper, middle and lower layers of impellers are evenly distributed in the circumferential direction, which can provide radial and axial stirring effects at the same time.
8. The stirring impeller suitable for mixing fluids with wide viscosity as described in claim 6, characterized in that: The blades of the axial flow propeller are planar blades at a certain angle to the axial direction, and the root angle and tip angle of the blades are the same. Alternatively, the blades of the axial flow propeller are curved blades at a certain angle to the axial direction, and the root angle and tip angle of the blades are different.
9. The stirring impeller suitable for mixing fluids with wide viscosity as described in claim 6, characterized in that: The folding angle of the folding blade is β, where 0 < β < 90°, and the relationship between the folding blade length l and the straight blade length L is: L / l = 5~2.
10. The stirring impeller suitable for mixing fluids with wide viscosity as described in claim 6, characterized in that: The relationship between the blade height H and the total blade height Hz of the F-type propeller is: Hz / H = 2.3~2.
6. The relationship between the upper width B and the lower width b of the blade of the F-type propeller is: B / b = 2~2.
5. The relationship between the total blade height H and the height of the width b portion of the F-type propeller is: H / h = 2~3, h / h1 = 2~2.5.