CN111729543A

CN111729543A - Planetary mixer

Info

Publication number: CN111729543A
Application number: CN202010599648.0A
Authority: CN
Inventors: 王文海; 张景昭; 祝嘉怡; 邱实; 彭蕾
Original assignee: Beijing University of Civil Engineering and Architecture
Current assignee: Beijing University of Civil Engineering and Architecture
Priority date: 2020-06-28
Filing date: 2020-06-28
Publication date: 2020-10-02

Abstract

The invention relates to a planetary mixer, comprising: the middle part of the fixed frame is provided with a rotatable vertical shaft along the vertical direction; and the rotating assembly comprises a rotating part and a stirrer, the rotating part is fixed on one side of the vertical shaft and is integrated with the vertical shaft, and the stirrer is fixed on the rotating part and rotates to simultaneously push the rotating part and the vertical shaft to synchronously revolve. The invention discloses a planetary stirrer.A stirrer is fixed on a rotating part and rotates to simultaneously push the rotating part and a vertical shaft to synchronously revolve; the position and the plug flow direction of the stirrer in rotation are continuously changed, so that the stirring effect is more uniform; the revolution power obtained by the method comes from the thrust reaction force of the stirrer, and an additional motor and a complex planetary gear train or a speed reducing mechanism are not needed, so that the structure is simplified, and the manufacturing, operation and maintenance cost, the power consumption and the failure risk rate are reduced.

Description

Planetary mixer

Technical Field

The invention relates to the technical field of stirring devices, in particular to a planetary stirrer.

Background

Agitators are machines that create forced convection of different types of liquid or gaseous media to achieve uniform mixing, and are sometimes used to uniformly disperse particulate or flocculent solids into a liquid or gaseous medium. The existing stirrers are of various types, and are classified into propeller type, turbine type, anchor type, frame type, helical belt type, screw type and the like according to the viscosity of a working medium and different stirring requirements. The basic principle is that mechanical motion of a moving part with stirring effect, such as a stirring blade, acts on peripheral fluid, mechanical energy is transferred to the fluid, and the moving speed of the fluid is increased, so that the mass transfer process is strengthened. Taking low viscosity stirring as an example, the condition that the fluid movement speed in the stirring area is greater than a certain value is often used as a criterion for achieving the expected stirring effect in the area. The greater the flow near the blade, the lower the flow of fluid further away from the blade. Obviously, when the paddle position is fixed, the effective influence area size is limited, and in order to enable the whole stirring of the large-scale stirring tank to be uniform, two modes can be adopted: one is that the power of the paddle is improved by increasing the diameter of the paddle or increasing the rotating speed, so that the effective stirring area of a single stirrer is enlarged, the flow rate of a core area is too high, the energy consumption is too much, and the biochemical process in the fluid can be damaged under certain conditions; secondly, a plurality of stirrers are arranged, which can significantly increase the construction and operation and maintenance costs. In order to solve the above problems, a new type of agitator has been developed, which is a planetary agitator, and is characterized in that the shaft of the moving part for stirring is not fixed, but moves circularly around a certain rotating shaft, that is: the stirring motion component rotates, and simultaneously, the rotation axis of the stirring motion component revolves around a certain rotating shaft, so the stirring motion component is called as a planetary stirrer.

The textile size stirring device for spinning disclosed in Chinese patent CN202010123662.3, the double-roller planetary stirrer disclosed in Chinese patent CN202010167951.3, the self-adjusting electronic planetary stirrer disclosed in Chinese patent CN111068551A, the planetary stirrer disclosed in Chinese patent CN201921081285.0 and the like, wherein the driving structures of the schemes comprise planetary gear pairs; chinese patent CN202010176421.5 discloses a driving structure of a high-efficiency unequal-pitch mixer, which relates to a speed reducer and a plurality of stirring rotors, and the main shaft is subjected to a large torque due to the transmission of stirring power, and needs to consume more materials. The common disadvantage of the solutions represented by these patent publications is that they are complex and require relatively precise machining, thus increasing the manufacturing and maintenance costs, and the reduction gear stage reduces the mechanical efficiency.

Therefore, how to provide a planetary mixer with simple structure, low cost and good mixing effect is a problem that needs to be solved urgently by the technical personnel in the field.

Disclosure of Invention

Therefore, the invention aims to provide a planetary mixer, which solves the problems that a planetary mixer in the prior art is complex in structure, high in manufacturing and operation and maintenance cost and low in mechanical efficiency due to a gear reduction link.

The invention provides a planetary mixer, comprising:

the middle part of the fixed frame is provided with a rotatable vertical shaft along the vertical direction;

and the rotating assembly comprises a rotating part and a stirrer, the rotating part is fixed on one side of the vertical shaft and is integrated with the vertical shaft, and the stirrer is fixed on the rotating part and rotates to simultaneously push the rotating part and the vertical shaft to synchronously revolve.

According to the technical scheme, compared with the prior art, the invention discloses a planetary stirrer, wherein a stirrer is fixed on a rotating part, and rotates to simultaneously push the rotating part and a vertical shaft to synchronously revolve; the position and the plug flow direction of the stirrer in rotation are continuously changed, so that the stirring effect is more uniform; the revolution power obtained by the method comes from the thrust reaction force of the stirrer, and an additional motor and a complex planetary gear train or a speed reducing mechanism are not needed, so that the structure is simplified, and the manufacturing, operation and maintenance cost, the power consumption and the failure risk rate are reduced.

Furthermore, the rotating part comprises a frame and a wing plate, one end of the frame is fixed on one side of the vertical shaft, and the other end of the frame is connected with the wing plate; the agitator is fixed to the frame. The wing plate and the frame play a role in blocking the rotating motion of the vertical shaft, the size and the shape of the wing plate are adjusted to change the resistance, and the rotating speed can be indirectly controlled; meanwhile, the wing plates and the frame also play a role in large-scale rotary stirring.

Furthermore, the fixing frame comprises two groups of fixing plates, and two ends of the vertical shaft are respectively connected to the two groups of fixing plates through bearings.

Further, the agitator is dive agitator, and external power source is connected to dive agitator cable.

Furthermore, a conductive slip ring is arranged at the position, corresponding to the first group of fixing plates, of the vertical shaft, an inner ring of the conductive slip ring is fixed on the vertical shaft and is electrically connected with the submersible stirrer through a submersible stirrer cable; the outer ring of the conductive slip ring is fixed with the first group of fixing plates and is connected with an external power supply through a submersible stirrer cable to form a power supply loop from the power supply to the submersible stirrer. Therefore, the inner ring and the outer ring of the conductive slip ring can rotate relatively without influencing the circuit to maintain conduction, and the problem of cable winding caused by rotation is avoided.

Furthermore, a plurality of rotating parts are arranged by taking the vertical shaft as a rotating center; thereby enhancing the stirring effect.

Furthermore, the stirrers are arranged in a plurality according to the use requirement and can be arranged at different positions or in different directions of the rotating part.

Furthermore, the vertical shaft is of a hollow structure, the top of the vertical shaft is connected with a rotary joint, a small amount of liquid or gas to be added is input into a cavity in the vertical shaft through the rotary joint, the position of the cavity, corresponding to the stirrer, is communicated with a medicament guide pipe, and the outlet of the medicament guide pipe is connected to the stirrer.

Because the injection position of the working medium of the existing stirrer is fixed, if a small amount of liquid or gas is mixed in a large amount of liquid medium, a large-range mixing movement with longer time and larger power is needed to achieve the uniform dispersion effect. According to the scheme, the mixed liquid or gas to be added is input into the cavity in the vertical shaft and reaches the position near the stirrer through the cavity and the medicament guide pipe, and the part of medium is directly crushed and dispersed by the impeller, so that the mass transfer efficiency can be greatly improved;

the rotary joint is a standard component and consists of an inner pipe and an outer sleeve which can mutually rotate, and is used for conveying liquid or gas under the condition of the rotation of the pipeline.

Drawings

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

FIG. 1 is a schematic structural view of an embodiment of a planetary mixer according to the present invention;

FIG. 2 is a schematic structural view of another embodiment of a planetary mixer according to the present invention;

in the figure: 1-fixed plate, 2-bearing, 3-vertical shaft, 4-frame, 5-wing plate, 6-submersible stirrer cable, 7-conductive slip ring, 8-stirrer, 9-rotary joint and 10-medicament conduit.

Detailed Description

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

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

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

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In one embodiment of the invention, there is provided an embodiment in which two stirrer axes are symmetrically arranged, see fig. 1, comprising:

the middle part of the fixed frame is provided with a rotatable vertical shaft 3 along the vertical direction;

and two sets of rotation assemblies which are arranged in an axisymmetric manner, wherein each set of rotation assembly comprises a rotation part and a stirrer 8, the rotation part is fixed on one side of the vertical shaft 3 and is integrated with the vertical shaft, and the stirrer 8 is fixed on the rotation part and rotates to simultaneously push the rotation part and the vertical shaft 3 to synchronously revolve.

In another embodiment of the invention, the device comprises a fixed frame, wherein a rotatable vertical shaft 3 is arranged in the middle of the fixed frame along the vertical direction;

and a plurality of groups of rotating assemblies which are arranged by taking the vertical shaft 3 as a center, wherein each group of rotating assemblies comprises a rotating part and a stirrer 8, the rotating part is fixed on one side of the vertical shaft 3 and is integrated with the vertical shaft, and the stirrer 8 is fixed on the rotating part and rotates to simultaneously push the rotating part and the vertical shaft 3 to synchronously revolve.

In other embodiments of the invention, the device comprises a fixed frame, wherein a rotatable vertical shaft 3 is arranged in the middle of the fixed frame along the vertical direction;

and a group of rotating assemblies, the rotating assemblies all include rotating part and agitator 8, the rotating part is fixed to one side of vertical shaft 3 and form an organic whole with it, agitator 8 is fixed to rotating part, and its rotation promotes rotating part and vertical shaft 3 revolution synchronously at the same time.

In the above embodiment, the rotating part comprises a frame 4 and a wing plate 5, one end of the frame 4 is fixed on one side of the vertical shaft 3, and the other end is connected with the wing plate 5; the agitator 8 is fixed to the frame 4. The wing plate and the frame play a role in blocking the rotating motion of the vertical shaft, the size and the shape of the wing plate are adjusted to change the resistance, and the rotating speed can be indirectly controlled; meanwhile, the wing plates and the frame also play a role in large-scale rotary stirring.

In the embodiment of the invention, the fixing frame comprises two groups of fixing plates 1, and two ends of the vertical shaft 3 are respectively connected to the two groups of fixing plates 1 through bearings 2.

In an embodiment of the present invention, the agitator 8 is a submersible agitator, and the submersible agitator cable 6 is connected to an external power source.

Advantageously, the vertical shaft 3 is provided with a conductive slip ring 7 corresponding to the first group of fixing plates, and an inner ring of the conductive slip ring 7 is fixed on the vertical shaft 3 and is electrically connected with the submersible stirrer through a submersible stirrer cable 6; the outer ring of the conductive slip ring 7 is fixed with the first group of fixing plates and is connected with an external power supply through a submersible mixer cable 6 to form a power supply loop from the power supply to the submersible mixer. Therefore, the inner ring and the outer ring of the conductive slip ring can rotate relatively without influencing the circuit to maintain conduction, and the problem of cable winding caused by rotation is avoided.

In the above embodiments, a plurality of stirrers are arranged according to the use requirement, and can be arranged at different positions or in different directions of the rotating part; thereby enhancing convection of the fluid at different spatial locations or directions.

In the above embodiments, the impeller may be pushed at a certain angle to the vertical shaft 3, but not limited to vertical or parallel.

When the submersible stirrer works, the submersible stirrer rotates to form a local stirring effect and simultaneously generate axial plug flow, the vertical shaft 3, the frame 4, the wing plate 5 and the stirrer 8 rotate under the reaction force of the plug flow, a liquid high-speed movement area formed by the submersible stirrer rotates around the shaft center, the position and the plug flow direction of the liquid high-speed movement area are continuously updated, and a wider effective stirring area is formed, so that the stirring effect is enhanced, and the purpose of saving energy under the condition of the same stirring effect is achieved.

The invention continuously changes the position and the plug flow direction of the effective stirring area through the rotation of the submersible stirrer 8 and the revolution around the vertical shaft, and solves the problem of small effective stirring area of the stirrer at a fixed position on the premise of not increasing the number of the stirrers. Compared with the method for increasing the number of the stirrers, the method has the remarkable advantages that: the number of equipment is reduced, and the construction and operation and maintenance cost is effectively reduced; secondly, the position and the plug flow direction of the stirrer are continuously changed, so that the stirring effect is more uniform; thirdly, the revolution power comes from the thrust reaction force of the submersible stirrer, and an additional motor and a complex planetary gear train or a speed reducing mechanism are not needed, so that the cost, the power consumption and the fault risk are reduced; and fourthly, the vertical shaft is only a support shaft and does not need to transmit power, so that the requirement on mechanical strength is reduced, and the manufacturing cost is saved.

In the above embodiments the vertical shaft 3 is a solid shaft.

Because the injection position of the working medium of the existing stirrer is fixed, if a small amount of liquid or gas is mixed in a large amount of liquid medium, a large-range mixing movement with longer time and larger power is needed to achieve the uniform dispersion effect.

Referring to fig. 2, in another embodiment of the present invention, the vertical shaft 3 is a hollow structure, the top of the vertical shaft is connected with a rotary joint 9, a small amount of liquid or gas to be added is input into a cavity in the vertical shaft 3 through the rotary joint 9, the cavity is communicated with a medicament conduit 10 corresponding to the stirrer 8, and the outlet of the medicament conduit 10 is connected to the stirrer 8.

This scheme is through the cavity of will waiting to add mixed liquid or gaseous input vertical scroll, reaches near the agitator through cavity, medicament pipe, and this part medium is directly broken by the impeller, the dispersion, can increase substantially mass transfer efficiency.

When the stirrer works in the embodiment, a small amount of liquid or gas enters the stirring tank through the rotary joint, the hollow vertical shaft and the medicament conduit, the impeller of the submersible stirrer rotates at a high speed, the small amount of liquid or gas is directly sucked into the impeller and uniformly crushed and dispersed into a liquid medium, and axial plug flow is generated while a local stirring effect is formed; the position and the plug flow direction of an effective stirring domain are continuously changed through the rotation of the submersible stirrer and the revolution around the hollow vertical shaft, and the submersible stirrer is directly sucked into the impeller and then crushed and dispersed through the scheme of directly injecting a small amount of liquid or gas near the impeller, and the continuous injection of a small amount of medium in the motion state is solved through the rotary joint. The problem that the effective stirring area of the stirrer at the fixed position is small is solved on the premise of not increasing the number of the stirrers.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples described in this specification can be combined and combined by those skilled in the art.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Claims

1. A planetary mixer, comprising:

the middle part of the fixed frame is provided with a rotatable vertical shaft (3) along the vertical direction;

and the rotating assembly comprises a rotating part and a stirrer (8), the rotating part is fixed on one side of the vertical shaft (3) and is integrated with the vertical shaft, the stirrer (8) is fixed on the rotating part, and the rotating part and the vertical shaft (3) are synchronously revolved under the action of autorotation of the stirrer.

2. Planetary mixer according to claim 1, characterized in that said rotating part comprises a frame (4) and wings (5), said frame (4) being fixed at one end to said vertical shaft (3) and at the other end to which said wings (5) are connected; the stirrer (8) is fixed on the frame (4).

3. Planetary mixer according to claim 2, characterized in that said fixed frame comprises two fixed plates (1), and said vertical shaft (3) is connected to said two fixed plates (1) at its two ends by means of bearings (2).

4. Planetary mixer according to claim 3, characterized in that the mixer (8) is a submersible mixer, the submersible mixer cable (6) being connected to an external power source.

5. Planetary mixer according to claim 4, characterized in that the vertical shaft (3) is provided with a slip ring (7) corresponding to the first set of fastening plates, the inner ring of the slip ring (7) is fastened to the vertical shaft (3) and is electrically connected to the submersible mixer via the submersible mixer cable (6); the outer ring of the conductive slip ring (7) is fixed with the first group of fixing plates and is connected with an external power supply through the submersible stirrer cable (6) to form a power supply loop from the power supply to the submersible stirrer.

6. Planetary mixer according to any of claims 1 to 5, characterised in that said rotating parts are in plurality, arranged with said vertical shaft (3) as the centre of rotation.

7. The planetary mixer according to claim 6, wherein the mixers are provided in plurality according to the use requirement, and can be provided at different positions or in different directions of the rotating part.

8. Planetary mixer according to claim 1, characterized in that said vertical shaft (3) is a hollow structure, and the top of said shaft is connected with a rotary joint (9), and a small amount of liquid or gas to be added is introduced into the cavity of said shaft (3) through said rotary joint (9), said cavity is communicated with a chemical conduit (10) corresponding to the position of said mixer (8), and the outlet of said chemical conduit (10) is connected to said mixer (8).