WO2017198065A1

WO2017198065A1 - Sound wave mixing device based on three-freedom-degree resonance system

Info

Publication number: WO2017198065A1
Application number: PCT/CN2017/082590
Authority: WO
Inventors: 陆志猛; 孙涛; 王青松; 曾庆林; 温常琰; 杜涛; 任响宁; 张俊杰
Original assignee: 湖北航鹏化学动力科技有限责任公司; 北京航天创新专利投资中心（有限合伙）
Priority date: 2016-05-16
Filing date: 2017-04-28
Publication date: 2017-11-23
Also published as: CN106000198A; CN106000198B; EP3459619A1; EP3459619B1; EP3459619A4

Abstract

A sound wave mixing device based on a three-freedom-degree resonance system comprises a rack (1), an excitation unit (2), a counteraction unit (3), and a load unit (4). The counteraction unit (3) is located in the middle of the rack (1) and is connected to an upper plate (103) and a lower plate (101) of the rack (1) by means of a second spring (301). The excitation unit (2) is located in the middle of the counteraction unit (3) and is connected to an upper plate (302) and a lower plate (304) of the counteraction unit (3) by means of a first spring (201). The load unit (4) is located between the rack (1) and the counteraction unit (3) and is separately connected to the rack (1) and the counteraction unit (3) by means of a third spring (403) and a fourth spring (406). A mixing container (401) can be fixed on the load unit (4) or the counteraction unit (3), or two mixing containers (401) are fixed on the load unit (4) and the counteraction unit (3) at the same time.

Description

Acoustic wave mixing device based on three-degree-of-freedom resonance system

Technical field

The present application relates to a mixing device, and in particular to an acoustic wave mixing device based on a three-degree-of-freedom resonance system.

Background technique

Hybrid equipment has been widely used in chemical, pharmaceutical, battery and other industries, but the mixed equipment currently used is mostly paddle mixers, which have long mixing time, low mixing efficiency, mixed dead angles in the mixing process, and the material feeding process cannot be simultaneously After the addition, the materials are difficult to clean after mixing, which seriously affects the production efficiency of the enterprise.

Summary of the invention

SUMMARY OF THE INVENTION It is an object of the present invention to provide an acoustic wave mixing device based on a three-degree-of-freedom resonance system capable of quickly and efficiently mixing materials with the above-mentioned deficiencies of the prior art.

In order to solve the above technical problem, the present invention provides an acoustic wave mixing device based on a three-degree-of-freedom resonance system, the device comprising:

a rack 1 comprising: a rack lower plate 101 and a rack upper plate 103 fixedly connected to the rack lower plate 101;

a reaction unit 3 comprising: a reaction upper plate 302 and a reaction lower plate 304 fixedly coupled to the reaction upper plate 302; the reaction unit 3 passing through a plurality of second upper springs 301a disposed on an upper surface of the reaction upper plate 302 And a plurality of second lower springs 301b disposed on the lower surface of the reaction lower plate 304 are supported in the frame upper plate 103 and the lower frame 101 of the frame 1;

An excitation unit 2 comprising: a fixing plate 202 supported on the reaction upper plate 302 by a plurality of first upper springs 201a disposed on an upper surface thereof and a plurality of first lower springs 201b on a lower surface thereof And the reaction between the lower plates 304;

a load unit 4 including: a load upper plate 402 and a fixed connection with the load upper plate 402 Loading the lower plate 407, the load lower plate is disposed between the reaction upper plate 302 of the reaction unit 3 and the reaction lower plate 304;

The load lower plate 407 is supported between the reaction upper plate 302 of the reaction unit 3 and the reaction lower plate 304 by a plurality of fourth upper springs 406a and a plurality of fourth lower springs 406b.

Preferably, the load unit 4 further includes: a plurality of spring guide posts 404 fixed to the lower surface of the load upper plate 402;

Each spring guide post 404 passes through the upper frame 103 to form upper and lower portions;

The upper half of the spring guide post 404 is sleeved with a third upper spring 403a supported between the upper surface of the upper frame 103 and the lower surface of the load upper plate 402;

The lower half of the spring guide post 404 is sleeved with a third lower spring 403b supported between the upper frame plate 103 and the lower end of the spring guide post 404.

Preferably, the reaction upper plate 302 is fixedly connected to the reaction lower plate 304 by a plurality of reaction force columns 303.

Preferably, the plurality of reaction force columns 303 respectively pass through a plurality of through holes provided on the load lower plate 407.

Preferably, the load upper plate 402 is fixedly coupled to the load lower plate 407 by a plurality of load connecting rods 405.

Preferably, each of the load connecting rods 405 sequentially passes through the upper frame plate 103, the second upper spring 301a, the reaction upper plate 302, and the fourth upper spring 406a.

Preferably, the plurality of first upper springs 201a and the plurality of first lower springs 201b are respectively disposed on the upper surface and the lower surface of the fixed plate 202 in an annular array; or

The plurality of second upper springs 301a and the plurality of second lower springs 301b are respectively disposed on the reaction upper plate 302 and the reaction lower plate 304 in an annular array.

Preferably, each of the first upper spring 201a and the central axis of each of the first lower springs 201b coincide; or

a center axis of each of the second upper springs 301a and each of the second lower springs 301b is coincident; or,

A center axis of each of the fourth upper springs 406a and each of the fourth lower springs 406b coincides.

Preferably, the upper surface of the fixing plate 202 is provided with a recess for limiting the first upper spring 201a; the lower surface of the fixing plate 202 is provided with a recess for limiting the first lower spring 201b; or

The upper surface of the reaction upper plate 302 is provided with a recess for limiting the second upper spring 301a; the lower surface of the reaction lower plate 304 is provided with a recess for limiting the second lower spring 301b; or

The frame upper plate 103 is provided with a recess for limiting the second upper spring 301a; the frame lower plate 101 is provided with a recess for limiting the second lower spring 301b; or

The lower surface of the reaction upper plate 302 is provided with a recess for limiting the first upper spring 201a; the upper surface of the reaction lower plate 304 is provided with a recess for limiting the first lower spring 201b; or

The lower surface of the reaction upper plate 302 is provided with a recess for limiting the fourth upper spring 406a; the upper surface of the reaction lower plate 304 is provided with a recess for limiting the fourth lower spring 406b.

Preferably, the apparatus further comprises: an excitation device fixed to the excitation unit 2.

Preferably, the excitation device is an eccentric mechanical vibration exciter, or an electromagnetic exciter, or a hydraulic exciter.

Preferably, the reaction lower plate 304 is provided with a plurality of holes for weight reduction.

Preferably, the apparatus further comprises: a mixing container 401 fixed to the reaction unit 3 and/or the load unit 4.

Preferably, the rack lower plate 101 and the rack upper plate 103 are fixedly connected by a plurality of rack pillars 102.

Preferably, the first upper spring 201a and the first lower spring 201b are disposed on the excitation unit 2 by press fitting; or the second upper spring 301a and the second lower spring 301b are set by press fitting On the reaction unit 3; alternatively, the fourth upper spring 406a and the fourth lower spring 406b are disposed on the load unit 4 by press fitting.

DRAWINGS

Specific embodiments of the present application will be described below with reference to the accompanying drawings, in which:

1 is a schematic structural view of an acoustic wave mixing device according to an embodiment of the present application;

2 is a cross-sectional structural view showing an acoustic wave mixing device according to an embodiment of the present application;

3 is a schematic structural view of a rack according to an embodiment of the present application;

FIG. 4 is a schematic structural diagram of an excitation unit according to an embodiment of the present application;

FIG. 5 is a schematic structural diagram of a reaction unit according to an embodiment of the present application;

FIG. 6 is a schematic structural diagram of a load unit according to an embodiment of the present application;

FIG. 7 is a schematic diagram showing the overall force of the acoustic wave mixing device according to the embodiment of the present application;

FIG. 8 is a diagram showing a third-order amplitude-frequency response diagram according to an embodiment of the present application;

FIG. 9 is a diagram showing a phase shift response of the third order described in the embodiment of the present application.

In the figure, 1, rack, 2, excitation unit, 3, reaction unit, 4, load unit, 101, lower rack, 102, rack column, 103, rack upper plate, 201, spring one, 202 , fixed plate, 301, spring two, 302, reaction upper plate, 303, reaction column, 304, reaction lower plate, 401, mixing container, 402, load upper plate, 403, spring three, 404, spring guide column, 405, Load connecting rod, 406, spring four, 407, load lower plate.

F is the exciting force, and m _i , c _i , and k _i are the masses, damping coefficients, and stiffness of each unit.

detailed description

The exemplary embodiments of the present application are further described in detail below with reference to the accompanying drawings, in which the embodiments described are only a part of the embodiments of the present application, but not all embodiments. An exhaustive example. And in the case of no conflict, the features in the embodiments and the embodiments in the description can be combined with each other.

In Fig. 1, the mixing device consists of a frame (1), an excitation unit (2), a reaction unit (3) and a load unit (4). The reaction unit (3) is located in the middle of the frame (1) and is connected to the upper plate (103) and the lower plate (101) of the frame (1) by the spring two (301a/b); the excitation unit (2) is located at the reaction unit (3) In the middle, it is connected to the upper plate (302) and the lower plate (304) of the reaction unit (3) through the spring one (201a/b); the load unit (4) is located between the frame (1) and the reaction unit (3). It is connected to the frame (1) and the reaction unit (3) by a spring three (403a/b) and a spring four (406a/b), respectively. The mixing container (401) may be fixed to the load unit (4) or fixed to the reaction unit (3), or both the mixing unit (4) may be fixed on the load unit (4) and the reaction unit (3). The excitation device of the excitation unit (2) may be an eccentric mechanical vibration exciter, an electromagnetic vibration exciter, or a hydraulic exciter.

The working process of the invention: the excitation device only generates the exciting force in the vertical direction, and drives the load unit and the reaction unit of the mixing device to be forced to vibrate. When the vibration frequency of the mixing device reaches the third-order natural frequency, the system generates a resonance effect, and the load upper plate with a certain acceleration motion transmits the kinetic energy to the mixing container, and the low-frequency sound waves are generated between the mixture materials in the container, breaking the boundary between the materials. The layer, the material flow freely, produces numerous micro-mixing zones to promote rapid mixing of materials. At resonance, the amplitude and acceleration of the system become sharply large, the energy required by the system is minimal, and the energy generated by the system is used for the effective mixing of materials. The movement direction of the load unit (4) and the reaction unit (3) is just opposite, and the generated forces cancel each other out. Once the mixing is complete, the container can be removed and the mixing container can be quickly replaced without the need for online cleaning.

2, 3, 4, 5, and 6, the rack 1 includes a circular rack lower plate 101, and an annular frame upper plate 103 connected to the lower frame 101 via a plurality of rack posts 102. .

The reaction unit 3 is disposed in the frame 1; the reaction unit 3 includes an annular reaction upper plate 302, an annular reaction lower plate 304 connected to the reaction upper plate 302 via a plurality of reaction columns 303, and a reaction upper plate 302 and a frame upper plate. A plurality of second upper springs 301a are press-fitted between 103, and a plurality of second upper springs 301a are evenly distributed; a plurality of second lower springs 301b are press-fitted between the reaction lower plate 304 and the lower frame 101 of the frame, and the plurality of The two lower springs 301b are evenly distributed; the second upper spring 301a and the second lower spring 301b are arranged in two groups, and the second upper spring 301a of each group coincides with the central axis of the second lower spring 301b.

The load unit 4 includes an annular load lower plate 407 placed between the reaction upper plate 302 and the reaction lower plate 304, and passes through the upper frame plate 103 and the second upper spring 301a and the reaction upper plate 302. A load upper plate 402 connected to the load lower plate 407 and above the upper frame plate 103; a fourth upper spring 406a is pressed between the load lower plate 407 and the reaction upper plate 302, and the fourth upper spring 406a The sleeve is disposed outside the load connecting rod 405; a fourth lower spring 406b corresponding to the fourth upper spring 406a is press-fitted between the load lower plate 407 and the reaction lower plate 304; and a plurality of spring guide columns are connected to the lower surface of the load upper plate 402. 404, the lower end of the spring guide post 404 passes through the upper frame 103; the portion of the spring guide post 404 on the upper frame 103 of the frame is provided with a third upper spring 403a, and the third upper spring 403a is press-fitted on the load upper plate 402 and the machine Between the upper plates 103; the portion of the spring guide post 404 located below the upper frame 103 of the frame is provided with a third lower spring 403b, and the third lower spring 403b is press-fitted to the lower plate flange of the frame upper plate 103 and the spring guide post 404. between.

The excitation unit 2 includes a fixing plate 202 disposed in the lower plate 407 of the load, and an excitation device connected to the fixed plate 202. A plurality of first upper springs 201a are fixed between the fixed plate 202 and the reaction upper plate 302. A plurality of first lower springs 201b disposed corresponding to the first upper spring 201a are press-fitted between the 202 and the reaction lower plate 304.

Also included is a mixing vessel 401; the mixing vessel 401 is secured to the load upper plate 402 of the load unit 4.

The upper surface of the upper frame 103 of the frame is provided with a recess for limiting the third upper spring 403a, and the lower surface is provided with a recess for limiting the third lower spring 403b. The two recesses are correspondingly disposed, and a spring is provided at the two recesses. a hole through which the guide post 404 passes; a lower surface of the upper frame 103 of the frame is further provided with a recess for limiting the second upper spring 301a; the upper frame 103 of the frame is provided with a hole for the load connecting rod 405 to pass through; The upper surface of the plate 101 is provided with a recess for limiting the second lower spring 301b.

The upper surface of the reaction upper plate 302 is provided with a recess for limiting the second upper spring 301a, and the lower surface is provided with a recess for limiting the fourth upper spring 406a. The two recesses are correspondingly arranged, and a load connection is provided at the two recesses. The through hole of the rod 405 passes through; the reaction upper plate 302 is further provided with a through hole for the spring guide post 404 and the third lower spring 403b; the lower surface of the reaction upper plate 302 is further provided with a first upper spring 201a for limiting a concave portion; a lower surface of the reaction lower plate 304 is provided with a concave portion for limiting the second lower spring 301b, and an upper surface is provided with a concave portion for limiting the fourth lower spring 406b, and the two concave portions are correspondingly disposed; The upper surface of the reaction lower plate 304 is further provided with a recess for limiting the first lower spring 201b. The reaction lower plate 304 is provided with a large hole for reducing the weight.

The upper surface of the load lower plate 407 is provided with a recess for limiting the fourth upper spring 406a, and the lower surface is provided with a recess for limiting the fourth lower spring 406b, and the two recesses are correspondingly arranged; the load lower plate 407 is provided with a reaction post 303. Through the hole.

The lower surface of the load upper plate 402 is provided with a recess for limiting the third upper spring 403a.

The reaction lower plate 304 is provided with a large hole for reducing the weight.

The mixing container 401 is one and is fixed to the load upper plate 402 of the load unit 4.

The mixing containers 401 are two, one fixed to the load unit 4 and the other fixed to the reaction unit 3.

The load unit 4 and the reaction unit 3 move in opposite directions, and the generated forces cancel each other out, and the force of the mixer on the ground is zero.

The hybrid device operates at a third order natural frequency, causing the system to resonate. When the mixing device is in a resonant state, the material in the container generates low-frequency sound waves, and the energy is all used for mixing between the materials, so that the materials are quickly and efficiently mixed. The system resonance amplitude is less than 15mm, the resonance frequency range is 60±5Hz, and the maximum acceleration is 200g.

When the mixing device is operating close to the resonant frequency, a sound vortex of <300 μm is generated inside the mixing vessel to allow the material to mix quickly and efficiently.

In Fig. 7, Fig. 8, and Fig. 9, the working principle of the acoustic wave mixing device based on the three-degree-of-freedom resonance system of the present invention is as follows:

According to the vibration theory, a single mass has a damping forced vibration equation: ma+cv+kx=F. From the force diagram of the system shown in Fig. 6, the forced vibration of the three-degree-of-freedom system under the action of simple harmonic excitation force is obtained. The equation of motion is:

In the formula:

m _i - the quality of each unit

c _i - damping coefficient

k _i - the stiffness of each set of springs

x _i , v _i , a _i - displacement, velocity, acceleration of each unit

{F}——The exciting force of the system

At present, there are many calculation methods for solving the natural frequency and main vibration mode of multi-degree-of-freedom systems, and some standard calculation programs are available. Commonly used methods are matrix iterative method, Deng Clay method, Rayleigh method, Liz method, subspace iteration method and so on.

Theoretically, when the excitation frequency reaches the natural frequency of the system, the system generates resonance, the load cell amplitude is the largest, and the required excitation force can be small, and the energy consumption is minimum. The present invention analyzes the phase frequency response and the amplitude-frequency response characteristic of a three-degree-of-freedom vibration system under a given set of mass, damping and stiffness parameters, and finds that when the first-order natural frequency and the second-order natural frequency are operated, The load unit and the reaction unit move in the same direction, causing the entire mixing device to vibrate too much, which is not conducive to the mixing work. When working at the third-order natural frequency, the load unit and the reaction unit move in opposite directions, the amplitude is close, and the force generated by the load unit and the reaction unit cancels each other inside the mixing device, and the mixing device does not generate ground force, so the third is selected. The natural frequency of the order is used as the operating frequency. See Figure 8 and Figure 9.

This solution is compared with the prior art:

1) Compatible with a variety of material systems: including liquid-liquid, liquid-solid, gas-liquid, solid-solid, especially suitable for mixing hazardous materials, with wide applicability;

2) Good mixing quality: First, it improves the quality of individual products; on the other hand, it reduces the difference between production batches;

3) Energy saving and high efficiency: the time required for the resonance mixture material is only 1/7 of the time required for the conventional mixing, and the resonance mixing energy loss is small, and the applied mechanical energy is all used for the mixing work, so the mixing efficiency is high and the energy saving effect is equivalent. protruding;

4) High safety: Resonant mixing and dispersion technology does not have mechanical rotating parts in contact with materials, and there is no paddle in the mixing container to improve the intrinsic safety of the process;

5) Mixing without dead angle: Resonant mixing technology causes micro-sonic eddy currents inside the mixing container to fully participate in mixing;

6) Easy to clean: When mixing, put the material in the mixing container, fix the container and the equipment, and take out the container after mixing. The mixing container can be quickly replaced without online cleaning.

Those skilled in the art will appreciate that embodiments of the present application can be provided as a method, system, or computer program product. Thus, the present application can take the form of a full device embodiment, an entirely software embodiment, or an embodiment in combination with software and device. Moreover, the application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) including computer usable program code.

It will be apparent to those skilled in the art that various modifications and changes can be made in the present application without departing from the spirit and scope of the application. Thus, it is intended that the present invention cover the modifications and variations of the present invention.

Claims

An acoustic wave mixing device based on a three-degree-of-freedom resonance system, characterized in that the device comprises:

a rack (1), the rack (1) comprising: a rack lower plate (101) and a rack upper plate (103) fixedly connected to the rack lower plate (101);

a reaction unit (3) comprising: a reaction upper plate (302) and a reaction lower plate (304) fixedly coupled to the reaction upper plate (302); the reaction unit (3) is disposed on the reaction upper plate ( 302) a plurality of second upper springs (301a) of the upper surface and a plurality of second lower springs (301b) disposed on the lower surface of the reaction lower plate (304) are supported on the frame upper plate (103) of the frame (1) And the lower plate of the rack (101);

An excitation unit (2) comprising: a fixing plate (202) passing through a plurality of first upper springs (201a) disposed on an upper surface thereof and a plurality of first lower surfaces thereof a spring (201b) is supported between the reaction upper plate (302) and the reaction lower plate (304);

a load unit (4) comprising: a load upper plate (402) and a load lower plate (407) fixedly connected to the load upper plate (402), the load lower plate being disposed in a reaction of the reaction unit (3) Between the upper plate (302) and the reaction lower plate (304);

The load lower plate (407) is supported by the reaction upper plate (302) and the reaction lower plate (304) of the reaction unit (3) by a plurality of fourth upper springs (406a) and a plurality of fourth lower springs (406b) between.
The acoustic wave mixing device according to claim 1, wherein the load unit (4) further comprises: a plurality of spring guide posts (404) fixed to a lower surface of the upper plate (402) of the load;

Each spring guide post (404) passes through the upper frame (103) of the frame to form upper and lower portions;

The upper half of the spring guide post (404) is sleeved with a third upper spring (403a), and the third upper spring (403a) is supported on the upper surface of the upper frame (103) of the frame and the upper plate (402) of the load. Between the lower surfaces;

The lower half of the spring guide post (404) is sleeved with a third lower spring (403b), and the third lower spring (403b) is supported between the upper plate (103) of the frame and the end of the lower half of the spring guide post (404).
The acoustic wave mixing device according to claim 1, wherein the reaction upper plate (302) is fixedly coupled to the reaction lower plate (304) by a plurality of reaction force columns (303).
The acoustic wave mixing device according to claim 3, wherein the plurality of reaction force columns (303) respectively pass through a plurality of through holes provided on the load lower plate (407).
The acoustic wave mixing device according to claim 1, wherein said load upper plate (402) is fixedly coupled to said load lower plate (407) via a plurality of load connecting rods (405).
The acoustic wave mixing device according to claim 5, wherein each of said load connecting rods (405) sequentially passes through a frame upper plate (103), a second upper spring (301a), and a reaction upper plate (302). And a fourth upper spring (406a).
The acoustic wave mixing device according to claim 1, wherein the plurality of first upper springs (201a) and the plurality of first lower springs (201b) are respectively disposed in an annular array on the fixing plate (202) On the upper and lower surfaces; or,

The plurality of second upper springs (301a) and the plurality of second lower springs (301b) are respectively disposed on the reaction upper plate (302) and the reaction lower plate (304) in an annular array.
The acoustic wave mixing device according to claim 1, wherein each of said first upper springs (201a) coincides with a central axis of each of said first lower springs (201b); or

a center axis of each of the second upper springs (301a) and each of the second lower springs (301b); or

A center axis of each of the fourth upper springs (406a) and each of the fourth lower springs (406b) coincides.
The acoustic wave mixing device according to claim 1, wherein said fixing plate (202) The upper surface is provided with a recess for limiting the first upper spring (201a); the lower surface of the fixing plate (202) is provided with a recess for limiting the first lower spring (201b); or

The upper surface of the reaction upper plate (302) is provided with a recess for limiting the second upper spring (301a); the lower surface of the reaction lower plate (304) is provided with a second lower spring (301b) for limiting Concave; or,

The frame upper plate (103) is provided with a recess for limiting the second upper spring (301a); the frame lower plate (101) is provided with a recess for limiting the second lower spring (301b); or

a lower surface of the reaction upper plate (302) is provided with a recess for limiting the first upper spring (201a); an upper surface of the reaction lower plate (304) is provided for limiting the first lower spring a recess of (201b); or,

a lower surface of the reaction upper plate (302) is provided with a recess for limiting the fourth upper spring (406a); an upper surface of the reaction lower plate (304) is provided for limiting the fourth lower spring The recess of (406b).
The acoustic wave mixing device according to claim 1, characterized in that the device further comprises: an excitation device fixed to the excitation unit (2).
The acoustic wave mixing device according to claim 10, wherein the excitation device is an eccentric mechanical vibration exciter, or an electromagnetic exciter, or a hydraulic exciter.
The acoustic wave mixing device according to claim 1, wherein the reaction lower plate (304) is provided with a plurality of holes for reducing the weight.
The acoustic wave mixing device according to claim 1, characterized in that the device further comprises: a mixing container (401) fixed to the reaction unit (3) and/or the load unit (4).
The acoustic wave mixing device according to claim 1, wherein said lower frame (101) The rack upper plate (103) is fixedly connected through a plurality of rack pillars (102).
The acoustic wave mixing device according to claim 1, wherein

The first upper spring (201a) and the first lower spring (201b) are disposed on the excitation unit (2) by press fitting; or

The second upper spring (301a) and the second lower spring (301b) are disposed on the reaction unit (3) by press fitting; or

The fourth upper spring (406a) and the fourth lower spring (406b) are press-fitted on the load unit (4).