WO2023061271A1 - Impeller assembly and mixing apparatus - Google Patents

Abstract

The present application discloses an impeller assembly and a mixing apparatus and relates to the technical field of solid and liquid mixing devices. The impeller assembly comprises an impeller structure and a housing structure. The impeller structure comprises a body, and the surface of the body is provided with multiple backward-curved blades, the blade angles of the backward-curved blades on any flow surface first decreasing and then increasing from an inlet to an outlet. A first baffle is disposed on a lower portion of the body, and the housing structure comprises a second baffle. The first baffle is provided with a first guide groove, and the second baffle is provided with a second guide groove. A fluid enters from an inlet in an upper portion of the body, flows along the surface of the body, and flows out by means of an outlet in a lower portion of the body, the first guide groove and the second guide groove. The center line of the first guide groove is deflected towards a direction opposite to the direction of rotation of the impeller structure, and the center line of the second guide groove is deflected towards the direction of rotation of the impeller structure. The present application solves the problems that discharge is unstable, there is a large amount of vibration and noise, and the working efficiency is insufficient.

Description

A kind of impeller assembly and mixing device

This application claims the priority of the Chinese patent application with the application number 202111190681.9 and the title of the invention "An impeller assembly and mixing device" submitted to the China Patent Office on October 13, 2021, the entire contents of which are incorporated by reference in this application .

technical field

The present application relates to the technical field of solid and liquid mixing equipment, in particular to an impeller assembly and a mixing device.

Background technique

In the related art, there is no special design for the airfoil of the inner blade and the flow channel of the fluid. The blade has limited ability to work on the fluid, and the multi-layer baffle will greatly hinder the movement of the fluid, making it difficult to discharge the material. Therefore, it is necessary to use the baffle The fluid is accelerated and expelled by the work of the discharge vanes on the outside of the plate. However, the forced acceleration and discharge of the fluid by the discharge blade will cause large pressure fluctuations in the discharge chamber, causing pulsation of the discharge flow, generating large noise and vibration, and reducing the working efficiency of the dispersion device.

Contents of the invention

The purpose of this application is to provide an impeller assembly and a mixing device to solve the above-mentioned problems in the prior art, and to solve the problem of unstable discharge, vibration, etc. And noise, work efficiency is not high enough.

In order to achieve the above object, the application provides the following scheme:

The present application provides an impeller assembly, including a relatively rotating impeller structure and a housing structure, the impeller structure includes a body, the surface of the body is provided with several backward curved blades along the circumference of the body, the body The lower part is provided with at least one layer of first baffles, and the first baffles are arranged on the outer sides of each of the backward curved blades, and the shell structure includes at least one layer of second baffles, and the second baffles are located on the The inner side and/or the outer side of the first baffle, the first baffle is provided with a number of first guide grooves, the second baffle is provided with a number of second guide grooves, the fluid flows from the inlet of the upper part of the body Enter, flow along the surface of the body, and flow out through the outlet of the lower part of the body, the first guide groove and the second guide groove, and the centerline of the first guide groove rotates to the impeller structure The direction is deflected in the opposite direction, and the center line of the second guide groove is deflected to the rotation direction of the impeller structure. .

Optionally, the size of the body gradually increases from the upper part of the body to the lower part of the body, and the surface of the body is a curved surface.

Optionally, the blade angle of the backward curved blade on any flow surface gradually decreases and then gradually increases from the inlet to the outlet, and the blade angle is the tangent of the surface arc of the backward curved blade and The included angle of the axial surface of the impeller structure.

Optionally, the blade angle at the inlet is 20-80°, and the blade angle at the outlet is 0-30°.

Optionally, the included angle between the centerline of the first guide groove and the radial direction of the central axis of the body is 15-50°.

Optionally, the included angle between the centerline of the second guide groove and the radial direction of the central axis of the body is 35-80°.

The present application also provides a mixing device, including the impeller assembly.

Compared with the prior art, the present application has achieved the following technical effects:

The backward curved blade adopted in this application can achieve better coupling with the flow of fluid when it rotates, so that the backward curved blade arranged on the body can perform work on the fluid more efficiently; especially, it is found through simulation calculation that the backward curved blade can The blade angle on the surface is designed to decrease first and then increase from the inlet to the outlet, which can make the backward curved blade work on the fluid more efficiently; on the other hand, by setting the first guide groove on the first baffle and the A second guide groove is provided to reduce kinetic energy loss when the fluid passes through the first baffle plate and the second baffle plate through the direction of the first guide groove and the second guide groove. After the fluid is dispersed through the dispersion area between the first baffle and the second baffle, it still has enough kinetic energy to be discharged by centrifugal means, and there is no need to add discharge blades that work on the fluid, which greatly reduces the impact on the discharge. The turbulence of the fluid in the material area keeps the fluid pressure in the discharge area uniform and stable, and the fluid can be discharged at a stable flow rate, eliminating the vibration and noise caused by pulsation.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the accompanying drawings required in the embodiments. Obviously, the accompanying drawings in the following description are only some of the present application. Embodiments, for those of ordinary skill in the art, other drawings can also be obtained based on these drawings without any creative effort.

Fig. 1 is the schematic diagram of the impeller assembly of the present application;

Fig. 2 is A-A sectional view of Fig. 1;

Figure 3 is a partial enlarged view of I in Figure 2;

Fig. 4 is the structural representation of the impeller of the present application;

Fig. 5 is a schematic diagram of the shell structure of the present application;

Among them: 100-impeller assembly, 1-impeller structure, 2-housing structure, 3-body, 4-backward curved blade, 5-first baffle, 6-second baffle, 7-first guide groove, 8 - Second guide slot.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the application with reference to the drawings in the embodiments of the application. Apparently, the described embodiments are only some of the embodiments of the application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

The purpose of this application is to provide an impeller assembly and a mixing device to solve the above-mentioned problems in the prior art, and to solve the problem of unstable discharge, vibration, etc. And noise, work efficiency is not high enough.

In order to make the above objects, features and advantages of the present application more obvious and comprehensible, the present application will be further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

Embodiment one

As shown in Figures 1-5: this embodiment provides an impeller assembly 100, including a relatively rotating impeller structure 1 and a housing structure 2, the impeller structure 1 includes a body 3, and the surface of the body 3 is along the circumference of the body 3 Several backward curved blades 4 are provided, at least one layer of first baffles 5 is provided on the lower part of the body 3, and the first baffles 5 are arranged on the outside of each backward curved blade 4, and the shell structure 2 includes at least one layer of second baffles 6. The second baffle 6 is located on the inside and/or outside of the first baffle 5. In this embodiment, the shell structure 2 is provided with two layers of second baffles 6 inside and outside, which are respectively located on the inside of the first baffle 5. and the outer side, the second baffle 6 is nested and fastened on the periphery of the first baffle 5, and the first baffle 5 is provided with a plurality of first guide grooves 7 along the circumferential direction, and the first guide grooves 7 are evenly distributed on the first baffle plate 5, and a number of second guide grooves 8 are opened on the second baffle plate 6 of the inner and outer layers along the circumferential direction, and the second guide grooves 8 are evenly distributed on the second On the baffle plate 6, the cross-sectional shape of the first guide groove 7 and the second guide groove 8 is similar to a rhombus, and the deflections of the first guide groove 7 and the second guide groove 8 are arranged alternately. The upper end of the body 3 of 1 is provided with a fluid inlet, and the lower end of the body 3 of the impeller structure 1 is provided with a fluid outlet. The outlet, the inner second guide groove 8, the first guide groove 7 and the outer second guide groove 8 flow out, and the centerline of the first guide groove 7 deflects to the opposite direction of the impeller structure 1's rotation direction , the center line of the second guide groove 8 deflects to the rotation direction of the impeller structure 1 .

In this embodiment, the impeller structure 1 rotates clockwise around the axis of the body 3 based on the placement direction in FIG. 2 .

In this embodiment, the size of the body 3 gradually increases from the upper part of the body 3 to the lower part of the body 3, the body 3 is in the shape of a truncated cone, and the surface of the body 3 is a curved surface. The meridian channel line of the main body 3 from the inlet to the outlet is an inwardly bent arc-like curve.

In this embodiment, the blade angle of the curved blade 4 on any flow surface gradually decreases from the inlet to the outlet and then gradually increases, and the blade angle is the tangent of the curved blade 4 surface arc and the axial surface of the impeller structure 1 Angle, and take a positive value.

In this embodiment, the gap between the backward curved blade 4 and the casing changes continuously and smoothly from the inlet to the outlet.

In this embodiment, the blade angle at the inlet is 20-80°, the blade angle at the outlet is 0-30°, and the smallest blade angle is 0-30°. The angular distribution of the blade angle is related to the aerodynamic load distribution of the backward-curved blade 4. According to the fluid simulation results in the backward-curved blade 4, the angular distribution of the blade angle is adjusted to achieve a better coupling between the fluid flow and the backward-curved blade 4, so as to ensure that the backward-curved blade 4 work efficiently on the fluid.

In this embodiment, the included angle (ie β ₂ ) between the centerline of the first guide groove 7 and the radial direction of the central axis of the body 3 is 15-50°. The included angle (ie β ₁ and β ₃ ) between the center line of the second guide groove 8 and the radial direction of the center axis of the body 3 is 35-80°. Specifically referring to Fig. 3, β ₁ is the angle between the center line L1 and the radial line R1 of the second guide groove 8 inside, and β ₂ is the angle between the center line L2 and the radial line R2 of the first guide groove 7 , _β3 is the angle between the centerline L3 of the second outer guide groove 8 and the radial line R3. The radial line R1 , the radial line R2 and the radial line R3 are all radial lines starting from the central axis of the body 3 . The intersection point of the centerline L1 of the second guide groove 8 of the second baffle plate 6 of the inner layer and the radial line R1 is located on the circumference where the inner wall of the second baffle plate 6 of the inner layer is located, and the centerline L2 of the first guide groove 7 The intersection point with the radial line R2 is located on the circumference where the inner wall of the first baffle plate 5 is located, and the intersection point with the center line L3 of the second guide groove 8 of the second baffle plate 6 of the outer layer and the radial line R3 is located at the second outer layer. On the circumference where the inner wall of the second baffle plate 6 is located.

The direction of rotation of the impeller assembly 100 is shown by the arrow in Figure 3. On the one hand, this embodiment controls the fluid load distribution of the backward curved blade 4 by adjusting the blade angle. The distribution of the blade angle makes the rotation of the backward curved blade 4 and the flow of the fluid better Coupling, so that the backward curved blade 4 set on the body 3 can work on the fluid more efficiently; on the other hand, by opening the first guide groove 7 on the first baffle 5 and the second guide groove 8 on the second baffle , the kinetic energy loss when the fluid passes through the first baffle plate 5 and the second baffle plate 6 is reduced by the direction of the first guide groove 7 and the second guide groove 8 . Specifically, the second baffle plate 6 fixed on the housing structure 2 is stationary, and the center line of the second guide groove 8 deflects to the rotation direction of the impeller structure 1, which can make the fluid flow smoothly without changing the direction greatly. through the second guide groove 8. The first baffle plate 5 fixed on the impeller structure 1 rotates together with the impeller structure 1, which can be regarded as the extension of the backward curved blade 4 except the first guide groove 7, and the first guide groove 7 also serves as Into a backbent structure, which is more conducive to doing work on the fluid.

After the fluid is dispersed through the dispersion area between the first baffle plate 5 and the second baffle plate 6, it still has enough kinetic energy to be discharged by centrifugation, and there is no need to add more The discharge vane that works on the fluid greatly reduces the disturbance of the fluid in the discharge area, so that the fluid pressure in the discharge area can be kept uniform and stable, and the fluid can be discharged at a stable flow rate, eliminating the vibration and vibration caused by pulsation noise.

Embodiment two

This embodiment provides a mixing device including the impeller assembly 100 of the first embodiment.

In this description, the application of specific examples to illustrate the principle and implementation of the application, the description of the above examples is only used to help understand the method of the application and its core idea; meanwhile, for those of ordinary skill in the art, according to this The idea of the application will have changes in the specific implementation method and application range. To sum up, the contents of this specification should not be understood as limiting the application.

Claims (7)

An impeller assembly, characterized in that it includes a relatively rotating impeller structure and a housing structure, the impeller structure includes a body, the surface of the body is provided with several backward curved blades along the circumference of the body, the body The lower part is provided with at least one layer of first baffles, and the first baffles are arranged on the outer sides of each of the backward curved blades, and the shell structure includes at least one layer of second baffles, and the second baffles are located on the The inner side and/or the outer side of the first baffle, the first baffle is provided with a number of first guide grooves, the second baffle is provided with a number of second guide grooves, the fluid flows from the inlet of the upper part of the body Enter, flow along the surface of the body, and flow out through the outlet of the lower part of the body, the first guide groove and the second guide groove, and the centerline of the first guide groove rotates to the impeller structure The direction is deflected in the opposite direction, and the center line of the second guide groove is deflected to the rotation direction of the impeller structure. The impeller assembly according to claim 1, wherein the size of the body gradually increases from the upper part of the body to the lower part of the body, and the surface of the body is a curved surface. The impeller assembly according to claim 1, characterized in that: the blade angle of the backward curved blade on any flow surface gradually decreases and then gradually increases from the inlet to the outlet, and the blade angle is the Describe the included angle between the tangent to the curved blade surface arc and the axial surface of the impeller structure. The impeller assembly according to claim 3, wherein the blade angle at the inlet is 20-80°, and the blade angle at the outlet is 0-30°. The impeller assembly according to claim 1, characterized in that: the included angle between the centerline of the first guide groove and the radial direction of the central axis of the body is 15-50°. The impeller assembly according to claim 1, wherein the included angle between the centerline of the second guide groove and the radial direction of the central axis of the body is 35-80°. A mixing device, characterized by comprising the impeller assembly according to any one of claims 1-6.

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