RU2056923C1 - Mixer working head - Google Patents

Abstract

FIELD: chemical, construction industries. SUBSTANCE: mixer working head has two in parallel located shafts spaced by some distance from each other. Two frames are fixed on each shaft, upper and lower sides of which are orthogonal to each other. In the case length of upper side of each frame is equal to length of its lower side. Each left or fight side of fixed on one shaft frames has the form of

and each upper and lower side of the frames has the form of S. Each side of fixed on other shaft frames has the form of

and each upper and lower side of the frames are made in the form of

Description

 The invention relates to the construction of devices for mixing two or more ingredients, for example liquids, solids or combinations thereof, in particular for the production of dough, creams, pastes, etc.

Known working body of the mixer, containing two shafts located in a vertical plane and spaced from each other at some distance, each of which is fixed to one frame. Moreover, on one of the shafts, the lower side of the frame is rotated relative to the upper side by a certain angle around the axis of rotation of the shaft clockwise, and on the other shaft counterclockwise. The upper and lower sides of the frames, equal in width, are made rectilinear [1]
The disadvantage of this working body is the low mixing efficiency. This is expressed in the fact that the speed characteristics of the working body at elevated rotational speeds are not fully realized.

Known working body of the mixer, containing two shafts located in a vertical plane and spaced at some distance from each other, on each of which are fixed two thin frames orthogonally oriented to each other. The sides of the frames in the direction of rotation have a pointed edge [2]
The disadvantages of the working body of the mixer are the low efficiency of mixing the processed ingredients and the increased cost of energy and time for mixing.

 The objective of the invention is to increase the efficiency of mixing the ingredients.

и являются зеркальным отображением верхних и нижних сторон рамок второго вала. Боковые стороны рамок первого вала выполнены в форме двух сопряженных между собой дуг, выпуклости которых направлены в одну сторону в виде фигуры

, и являются зеркальным отображением боковых сторон рамок второго вала. При этом длин верхних и нижних сторон рамок одинаковы.This is achieved by the fact that the working body of the mixer contains two parallel shafts spaced at some distance from each other, on each of which two frames are fixed, the upper and lower sides of which are orthogonally oriented to each other. The upper and lower sides of the frames on one shaft are made in the form of two conjugated arcs, the convexities of which are directed in opposite directions in the form of a figure

and are a mirror image of the upper and lower sides of the frames of the second shaft. The lateral sides of the frames of the first shaft are made in the form of two conjugated arcs, the convexities of which are directed to one side in the form of a figure

, and are a mirror image of the sides of the frames of the second shaft. The lengths of the upper and lower sides of the frames are the same.

 In FIG. 1 shows a structural diagram of the working body of the mixer; in FIG. 2, view A of FIG. 1; figure 3 section BB in figure 1; in Fig. 4, section BB in Fig. 1; in FIG. 5 side of one frame; in Fig.6 view G in Fig.5; 7, the side of other frames; in Fig.8 view D in Fig.5; Fig.9 is a projection drawing of one shaft with frames; figure 10 is a projection drawing of another shaft with frames; figure 11 diagram of the working body of the mixer; in FIG. 12 profile of the vertical velocity component along the height of the frames; on Fig mechanism of interaction of the side of the frame with a particle of ingredient.

α₁=

α₂, по отношению к вертикальной плоскости 9, совпадающей с плоскостью чертежа. Высота рамок 3 6 b. Длины верхних и нижних сторон рамок с, причем выполняется условие

>

. Верхние стороны рамок 3 6 приведены в сечении Б Б (фиг.3), а нижние стороны рамок 3 6 в сечении В-В (фиг. 4), причем верхние и нижние стороны рамок 3 и 4 выполнены в виде

, а верхние и нижние стороны рамок 5 и 6 в виде

. Верхние стороны рамок 3 и 4 соединены с их нижними сторонами боковыми; каждая боковая сторона выполнена в виде

(фиг.5 и 6), которая выгнута по криволинейной поверхности относительно вертикальной линии m, проходящей через середину боковой поверхности на расстоянии K₁=

от его концов, где К₂ ширина элемента. Точка перегиба n расположена по высоте на расстоянии b₁ f₁b, где f₁ коэффициент, принимающий значения в промежутке 0; 1[ Верхние стороны рамок 5 и 6 соединены с их нижними сторонами боковыми; каждая боковая сторона выполнена в виде

(фиг.7 и 8), которая выгнута по криволинейной поверхности относительно вертикальной линии Р, проходящей через середину боковой стороны на расстоянии K₃=

от его концов, где К₄ ширина элемента. Точка перегиба q расположена по высоте на расстоянии b₂ f $\genfrac{}{}{0ex}{}{\text{b}}{\text{2}}$ , где f₂ коэффициент, принимающий значения в промежутке 0; 1 [. Причем значения К₂ К₄ и f₁ f₂ для двух пар рамок. Таким образом, боковые стороны рамок 3 6 имеют пространственные винтоподобные линии как правого, так и левого вращения одновременно (фиг.9 и 10).The working body of the mixer (figure 1 and 2) consists of two shafts 1 and 2; with frames on the shaft 1 is fixed a pair of frames 3 and 4, and on the shaft 2 a pair of frames 5 and 6. The shafts 1 and 2 have axes 7, 8, respectively, the distance between which a. Both the upper and lower sides of frames 3 and 4 are rotated relative to each other at an angle α ₁ and the upper and lower sides of frames 5 and 6 are rotated relative to each other at an angle α ₂ with α ₁ = α ₂ Frames 5 and 6 are rotated relative to frames 3 and 4 at an angle β where β

α ₁ =

α ₂ , with respect to the vertical plane 9, coinciding with the plane of the drawing. Frame height 3 6 b. The lengths of the upper and lower sides of the frames with, and the condition

>

. The upper sides of the frames 3 6 are shown in section B B (Fig. 3), and the lower sides of the frames 3 6 are in section B-B (Fig. 4), and the upper and lower sides of frames 3 and 4 are made in the form

, and the upper and lower sides of the frames 5 and 6 in the form

. The upper sides of the frames 3 and 4 are connected with their lower sides by the side; each side is made in the form

(FIGS. 5 and 6), which is curved along a curved surface relative to a vertical line m passing through the middle of the side surface at a distance K ₁ =

from its ends, where K _{2 is the} width of the element. The inflection point n is located at a height at a distance b ₁ f ₁ b, where f _{1 is a} coefficient that takes values in the interval 0; 1 [The upper sides of the frames 5 and 6 are connected to their lower sides by the side; each side is made in the form

(Fig.7 and 8), which is curved along a curved surface relative to a vertical line P passing through the middle of the side at a distance of K ₃ =

from its ends, where K _{4 is the} width of the element. The inflection point q is located in height at a distance of b ₂ f $\genfrac{}{}{0ex}{}{\text{b}}{\text{2}}$ where f ₂ coefficient taking values in the interval 0; 1 [. Moreover, the values of K ₂ K ₄ and f ₁ f ₂ for two pairs of frames. Thus, the sides of the frames 3 6 have spatial helical lines of both right and left rotation at the same time (Figs. 9 and 10).

 The working body of the mixer operates as follows.

и

. Под действием вращающихся пар рамок 3, 4 и 5, 6 смешиваемые ингредиенты 11 сначала образуют две локальные вращающиеся навстречу друг другу зоны смешения 12 и 13, которые впоследствии инициируют (за счет вязкости среды) движение по всему объему емкости 10. За счет центробежных сил ингредиенты от осей 7 и 8 перемещаются на периферию рамок 3 6. Направление выпуклостей на верхних и нижних сторонах пар рамок 3 6 против вращения способствует некоторому торможению частиц в верхней и нижней зонах рамок, что приводит к возникновению локальных зон противотечения частиц ингредиентов, что также способствует развитию процесса смешения. Боковые стороны l₁,l₂,l₃,l₄,l₅,l₆,l₇,l₈, рамок 3, 4 и 5, 6 от верхних до нижних сторон воздействуют на частицы ингредиентов, перемещая их не только в горизонтальной плоскости S_г; но и в вертикальной S_в вдоль рамок 3, 4 и 5, 6 как вверх, так и вниз по высоте емкости 10, так как геометрия боковых сторон в немалой степени определяет характер изменения вертикальной составляющей скорости V_втечения смешиваемых ингредиентов (фиг.12), увеличивая длительность взаимодействия их с рабочим органом, дополнительно измельчая и перемешивая (фиг.13). В межосевой зоне 14 происходит интенсивное перемешивание ингредиентов 11 за счет мощных локальных вихревых зон, которые образуются при вращении рамок 3, 4 и 5, 6. Пространственная винтоподобность боковых сторон рамок 3, 4 и 5, 6 приводит к тому, что поток вдоль них будет закрученным. Закрученный поток смешиваемых ингредиентов 11 будет сливаться с рабочего органа 9 верхних и нижних сторон рамок, а забор будет происходить как в зоне возле осей 7 и 8, так и в зоне выступов боковых сторон.In the container 10 (Fig. 11) placed the mixed ingredients 11 and the working body of the mixer. The frames rotate synchronously towards each other in the direction of rotation (N.V.) with angular velocities

and

. Under the action of rotating pairs of frames 3, 4 and 5, 6, the mixed ingredients 11 first form two local mixing zones 12 and 13 rotating towards each other, which subsequently initiate (due to the viscosity of the medium) movement throughout the volume of the container 10. Due to centrifugal forces, the ingredients from the axes 7 and 8 are moved to the periphery of the frames 3 6. The direction of the bulges on the upper and lower sides of the pairs of frames 3 6 against rotation contributes to some inhibition of particles in the upper and lower zones of the frames, which leads to the appearance of local countercurrent zones particles of ingredients, which also contributes to the development of the mixing process. The sides l ₁ , l ₂ , l ₃ , l ₄ , l ₅ , l ₆ , l ₇ , l ₈ , frames 3, 4 and 5, 6 from the upper to the lower sides act on the particles of the ingredients, moving them not only horizontally plane S _g ; but also along the vertical S _in frames 3, 4, 5, 6, both up and down the height of the container 10, since the geometry of the sides largely determines the nature of the change of the vertical component of flow _velocity V of mixed ingredients (12) , increasing the duration of their interaction with the working body, additionally grinding and mixing (Fig.13). Intensive mixing of the ingredients 11 occurs in the interaxal zone 14 due to powerful local vortex zones, which are formed during the rotation of frames 3, 4 and 5, 6. Spatial screw-likeness of the sides of the frames 3, 4 and 5, 6 leads to the fact that the flow along them will be swirling. A swirling flow of mixed ingredients 11 will merge from the working body 9 of the upper and lower sides of the frames, and the fence will occur both in the area near the axes 7 and 8, and in the area of the protrusions of the sides.

 As follows from the description of the design of the working body of the mixer and its operation, the proposed working body allows you to effectively mix different viscosity ingredients.

 The operation of the mixer body, based on the use of centrifugal and propeller principles, leads to a decrease in the mixing time and the amount of electricity consumed, as well as to obtain a mixture with a finer-dispersed structure, and therefore more uniform in quality.

Claims (1)

 WORKING BODY OF THE MIXER, containing two parallel shafts, on each of which two frames are fixed, the upper and lower sides of which are orthogonally oriented to each other, characterized in that each side of the frames mounted on the first shaft has the form of two arcs conjugated , the convexities of which are directed in one direction, and each lower and upper sides of the frames has the form of two conjugate arcs, the convexities of which are directed in opposite directions, each side of the frames, fixed data on the second shaft, has the form of two conjugated arcs, the convexities of which are directed in one direction, and is a mirror image of the sides of the frames of the first shaft, and each lower and upper sides of the frames has the form of two conjugated arcs, the convexities of which are opposite side, and is a mirror image of the upper and lower sides of the frames of the first shaft, and the lengths of the upper and lower sides of the frames are the same.

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