DE2033168A1 - Mixing device - Google Patents

Description

Dipl. Ing. R. Merterre.

Patent attorney.

6Frankfurt / Main 1, Ammeiburgstr. 34

Frankfurt am ^Main, l.Juli 1970

- H 31 P 211 -

HONEYWELL INC.
* 2? 01, SOurth Avenue South Minneapolis, fönn / ÜSA

μ mixing device ¹ *

The invention relates to a mixing device for mixing two or more media. .

With the known mixing devices can either only mix a few selected media with one another or the mixing devices are constructed quite complicated and accordingly prone to failure and costly to manufacture.

The object of the invention is to create a simply constructed mixing device which is able to mix two or more media to mix with each other, wherein the media to be mixed can be, for example, gases, liquids or both. The inventive Mixing device should in particular be able to handle also non-mutually soluble media in the form of emulsions to be connected to each other, as is the case, for example, with analytical measurements is necessary, in which the measuring devices only work precisely when the sample to be analyzed consists of an emulsion does not have any larger particles from one of the media to be mixed.

The object is achieved in that in the face of a stationary rotor, which is perpendicular to the axis of rotation, recesses are incorporated which are remote from the axis of rotation and at their inner end with a concentric to the axis of rotation

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extending preferably stationary inlet channel in connection; stand and open at their outer "end into a collecting space for the mixed media» The rotor face is provided with ^: at least one annular recess concentric to the rotor axis of rotation in the plane; The end face of a stator opposite the rotor end face covers the recesses and the annular recess, whereby closed channels are formed Channel penetrated liquid "is displaced along this channel, while the centrifugal force presses the liquid in the channels remote from the rotor axis of rotation to the collecting space. As a result, the liquid displaced along the intersecting channels is mixed well at the interfaces. With a mixing device designed in this way, it is possible to mix any two or more media with one another, regardless of whether they are gaseous, liquid or liquid and gaseous media and also regardless of whether the media to be mixed are soluble in one another or not . In particular, a mixing device constructed in this way is capable of "forming an" emulsion of oil and water, as is required as a sample for analyzes.

A particularly simple structure is obtained if the rotor is disk-shaped and the channels are remote from the rotor axis of rotation run radially to the rotor axis of rotation. On the other hand, it can atf ei * can also be advantageous if they move away from the rotor axis of rotation Channels partially extend against the direction of rotation of the rotor and are possibly curved, whereby the caused by the rotor rotation, on the su mixing media acting centrifugal force is reinforced. MacH a widower Feature of the invention can be the mixing effect "de ^ device improve by being in the end face of the rotor

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at least two annular recesses are incorporated and that each of the annular recesses has a number of annular shapes arranged, connected to the stator approaches are assigned. In such a configuration of the mixing device, place the media to be mixed in the various annular recesses have different paths with differing speeds back, which favors the mixing effect. A particularly good mix results when the perpendicular to the radial recesses standing side surfaces of the lugs are chosen so large that they are during the rotation of the rotor close the individual radially extending channels one after the other.

In many cases it is desirable to have this out of the exhaust port outflowing mixture flows as evenly as possible, which is can be achieved according to a feature of the invention in that the Approaches are arranged in a ring that as soon as one of the approaches blocks one of the radially extending channels, the adjacent one radial channel is only partially blocked by an approach. This way it can because of the acting Centrifugal force pressurized mixture always consists of a, of the just opened channels running in the radial direction flow and it is prevented that all channels at the same time are open or closed. :

Further features of the invention emerge from the exemplary embodiment which is explained below with reference to the drawing. It shows:

Figure 1 is a sectional view of an inventive Mixing device, the cutting plane being at the height of the axis of rotation of the rotor,

FIG. 2, in a reduced representation, the top view of the end face of the stator provided with extensions of the exemplary embodiment according to FIG. 1,

Figure 3 shows the section at the level of the line J>-J> through the stator shown in Figure 2,

FIG. 4 in a reduced representation, the plan view of the with Recesses provided end face of the rotor of the embodiment according to Figure 1 and

109808/1819.

FIG. 5 shows the section at the level of line 5-5 through the rotor shown in FIG. ^v

The essential parts of the mixing device shown in FIG 10 are the stator 12, the disc-shaped rotor 14 and the housing 16.

The stator 12, which is not only shown in FIG. 1 but also in FIGS. 2 and 3 is shown, has the shape of a flat lid on which a smaller first ring of similar lugs 18, 20, 22, 118 is attached to an end face shown in FIG. This first ring is enclosed by a larger second ring, which also consists of similar approaches 24,26,28,120. The approaches belonging to one ring are identical to one another, but differ from the approaches belonging to the other ring away. In the direction of the longitudinal axis of the stator 12, an internal thread 30, which, with the external thread 34, of an inlet channel 32 is screwed. At the outer edge of the end face, two pairs of through holes 36, 38, 40, 42 opposite one another are provided serve the z-ir connection of the stator with the housing l6. In order to connect the stator 12 to the housing 16, screws 46 shown in FIG. 1 are inserted through the through holes 36 to pushed into the stator and suitable through holes in the housing l6 and then screwed with nuts 52. To seal the from the interior space enclosed by the stator and the housing is provided with an annular seal 44 (see FIG. 1), which is inserted between the through the screws pressed against each other surfaces of the stator 12 and housing 16 is placed. In this way, it is gas- and liquid-tight Inner space accommodates the rotor 14.

There are two annular recesses in the cylindrical rotor 16 64, 66, an annular recess 68 and a number of recesses 70 to 88 extending in the radial direction are provided. The recess and the recesses are incorporated into the rotor by casting. The cylindrical rotor hub 92 has

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a beveled side edge 9k, which facilitates the flow of the media to be mixed, as will be described further below. In the hub 92, which is cast in one piece with the rotor, an internal thread 96 is incorporated which is connected to a. External thread 98 is screwed to the end of the rotor shaft 100, whereby the rotor and rotor shaft are firmly connected to one another. The rotor shaft 100 is driven by a motor not shown in the drawing. On the side of the housing facing away from the stator, a bore 102 located coaxially to the rotor axis of rotation 100 and partially provided with an internal thread I08 is incorporated, into which a packing 106 for sealing the rotor shaft is inserted. The packing I06 is pressed against the rotor shaft 110 with the aid of a threaded sleeve 110 provided with an external thread 104. The tubular outer wall of the housing. 16 has a threaded hole 111 through which an outlet channel 114 provided with an external thread 112 is screwed to the housing 1.6 to build. The water with the large oil droplets floating in it is fed to the mixing device via the inlet channel J> 2 in the direction indicated by an arrow 116. Instead of a single inlet channel J> 2 , the mixing device according to the invention can also be provided with two or more inlet channels running parallel to one another or concentrically, which has the advantage that the media that are sucked in by the pumping action of the mixing device according to the invention and flowing separately in their mixing ratio, e.g. can be changed by acting on the individual inlet channels valves. By the rotation of the rotor 14 centrifugal forces take effect which the liquids to be mixed (in the example described here a mixture of water and oil accepted) from the inner in Figure 1 and 4, recess 68 along the radially extending recesses 70-88 for outer end of the rotor face 90 drive. While the now moved with the oil drops provided water along the radially extending grooves 70 to 88 to the outside, individual parts are of along this

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Channels flowing flow through the projections 18, 20, 22, 118 assigned to the first annular recess 66 one after the other torn out and moved along this annular recess. Each of the individual cut-out flow segments is moved along the annular recess 66 to the next, transported in the radial direction extending recess, where it flows with the along this radial recess Flow united. The current, which is already well mixed in this way and flowing in a radial direction, will take a short time cut again by the lugs 24,26,28,120 flow segments' press into the annular recess 64, where they are longitudinal this recess can be transported to the next recess extending in the radial direction and is aligned with the recess there flowing stream ". Then the current continues to flow along the channels running in the radial direction, to it leaves these channels and is stored under pressure in a plenum 62 inside the housing 16 and from there as well mixed emulsion flows through the outlet channel 114. The good Mixing of the individual media can not only be explained by the shifting of the individual fluid segments, but also due to the turbulence that occurs due to the constant change in direction of the flow.

While now individual parts of the flow flowing along the radial recesses sheared out and along the annular Recesses are shifted, the course of the flow becomes too towards the outer end of the channels weakened but not interrupted. This is because the lugs 18 to 28 and the recesses 70 to 88 extending in the radial direction are relative to one another are arranged so that whenever one of the recesses running in the radial direction is crossed by a shoulder (e.g. recess 70 is closed by attachment 28, 22), the next recess (e.g. 88) is only partially closed by an attachment (e.g. attachment 24:18) is closed. However, opposing recesses (e.g. recess 70 and 80) are always simultaneously closed by approaches (e.g. approaches 24, Ιδ, ΐΐθ, 120) because of the

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offset position of the recesses extending in the radial direction and the approaches uniformly flowing out of the outlet channel Il4 mixture, which in the example described here is an emulsion of oil and water can, for example, be fed to an analysis device that measures the proportion of the now finely divided oil in the water.

For many cases it can be desirable to use centrifugal force to increase, which can be achieved by the fact that the recesses previously running in the radial direction counter to the direction of rotation of the rotor are bent, which results, for example, laterally bent recesses outward. Another The possible variation of the mixing device according to the invention is, not as shown in FIG To arrange approaches belonging to rings one behind the other (such as attachment 18 and attachment 24), but laterally to one another to move. In addition, there is of course the possibility of determining the number of annular recesses and the number the approaches assigned to them in accordance with the to to change mixing media. "

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Claims (10)

Claims \ l / Mixing device, characterized in that ^{: J} j that in the end face of a rotor (14) which is perpendicular to the axis of rotation (100) and which is remote from the axis of rotation (100) of the rotor, recesses (70 to 88) are machined, which at their inner end with . a concentric to the axis of rotation, preferably stationary inlet channel 02) for the media to be mixed and open with their outer end into a collecting space (62) for the mixed media that the rotor face with at least one concentric to the rotor axis of rotation in the plane of the recess lying annular recess {6k, 66 \ is provided, which intersects the recesses distant from the rotor axis of rotation, that the end face opposite the rotor end face of a P stator (12) covers the recesses and the annular recess, whereby closed channels are formed, and that the stator is provided with at least one projection (18 to 28) projecting into the annular channel, whereby when the rotor rotates the into the annular channel Penetrated liquid is displaced along the channel, while the centrifugal force presses the liquid in the channels _a away from the rotor's axis of rotation towards the collecting space. 109808/1819 2. Mixing device according to claim 1, characterized by that the rotor (14) is disc-shaped and the channels (70 to 88) run radially to the rotor axis of rotation. 3 · Mixing device according to claim 1 or 2, characterized in that in the end face of the rotor (14) at least two annular recesses (64,66) are incorporated and that each of the annular recesses a number of annular arranged, with the stator (12) connected lugs (18 to 28) is assigned. 4. Mixing device according to each other claims 1 to 3, d a - d u r c h g e k en η ζ e i c h η e t that the cross-section which is perpendicular to the direction of extension of the annular. Recess (s) (64,66) extending boundary surfaces of the Approaches (18 to 28) fills almost the entire cross section of the annular recess (s). 5. Mixing device according to one of claims 2 to 4, d a - d u r c h g e k e η η ζ e i c h η e t that the perpendicular to the radial recesses (70 to 88) standing side surfaces of the lugs (18 to 28) are selected so large that they during the rotation of the rotor (100) the individual radially extending Close channels one after the other. 6. Mixing device according to claim 5 * d a d u r c h g e k e η η ζ ei without t that the perpendicular to the radial recesses (70 to 88) standing side surfaces of the approaches (18 to 28) have the same curvature as the side walls of the annular recesses (64,66) facing them. have, along which the "approaches (18 to 28) when rotating Move the rotor (100) and one after the other close the individual radial channels that form the ring-shaped channels assigned to them Cut the recess. 10 9808/1819 7. Mixing device according to one of claims 1 to 6, characterized in that each of the approaches (18 to 28) has two side surfaces which run radially to the axis of rotation of the rotor (100). 8. Mixing device according to one of claims 5 to 7 * there through characterized in that the approaches (l8 to 28) are arranged in a ring that once one of the approaches closes one of the radial channels (e.g. 70), the adjacent radial channel (e.g. 71) is only partially closed by an approach. 9. Mixing device according to claim 5, d ad u r c h g 8 indicates, that at least two pairs of diametrically opposite radially extending channels (70,8θ; 7β, 86) are provided in which as soon as one pair (70,8oj) is closed by two opposing approaches (24,120) is, the other pair (76,86) is only partially closed will. 10. Mixing device according to one of claims 1 to 9, characterized characterized in that the stator (12) which forms an end wall of a substantially cylindrical housing (16) enclosing the rotor (14) and that the outer surface of the disc-shaped rotor in a small Distance is surrounded by the tubular outer wall of the housing, in which the outlet channel (114) of the mixing device is provided. 109808/1819 Readers ι te