DE2217203C2 - Blade wheel for hydrodynamic torque transmission devices - Google Patents

Description

50

The invention relates to a paddle wheel for hydrodynamic torque transmission devices with symmetrical between an outer and an inner ring shell arranged concentrically to it distributed over the circumference, approximately radially, single blades held by plug connections.

From DE-PS 9 61 408 such a paddle wheel for a hydrodynamic coupling is known; through this a simple and safe assembly of the impeller body of the coupling is achieved, whose Shell-shaped housing parts even secure the individual blades against the effects of centrifugal force. In practice However, it has been shown that such with single blades provided paddle wheels z. B. tear or break due to sudden very strong shock loads. Around To prevent this, it has already been proposed to increase the strength of the individual blades or the Individual blades to be additionally soldered or welded at their contact points with the ring shells. During welding points again due to the influence on the structural makeup of the material Difficulties resulted, the other measures just mentioned have also proven to be insufficient proven to prevent the individual blades from tearing off or breaking.

The invention is based on the object of ensuring, in a paddle wheel of the type mentioned at the beginning, that the inner ring shell with the outer ring shell no relative movement even under extremely high loads can perform to each other.

The object is achieved in that, in addition to the individual blades, rigid connections between the Outer and inner ring shells are provided.

Only by being independent of the suspension or attachment of the individual blades Provides additional measures that ensure absolute torsional rigidity of the inner ring shell with respect to the outer ring shell bring about, it is ensured that the individual blades tear off or break with them Security is avoided.

It is known from DE-OS 20 44 982, instead of individual blades, a blading in the form of a provide wave-shaped ring element, which is located between the outer ring shell and the inner ring shell extends and connects them together; This results in a torsional stiffness of the outer ring shell reached in relation to the inner ring shell, but must be taken in K.auf that through the At an angle to the radial blades, hydrodynamic disadvantages arise. In contrast is made possible by the individual blading, known since the late thirties, which is essentially radial Direction runs, hydrodynamically achieved a much better performance; by the invention intended additional measure, namely the rigid connection between the two ring shells is the hydrodynamic performance of the essentially radial individual blades. g not impaired.

According to a preferred embodiment of the invention, the connections are between two adjacent Single blades arranged; they can be separate from each other.

According to a particularly expedient and simple embodiment, there are at least three connections intended; in order to minimize the movement of the working fluid between the two ring shells influence, the connections can only extend over a portion of the individual blades.

The connections preferably consist of plate-shaped struts; these struts can be in pairs and be arranged as a mirror image of a single blade.

According to another Ausfühningsform the connections are integral with the outer or the Inner ring shell connected.

The struts can extend from the junction of a single blade to the outer ring shell Extend the connection point of the neighboring blade with the inner ring shell.

Several exemplary embodiments of the invention are shown in the drawing; she are described in more detail below; it shows

Fig. I a partial view of an embodiment of a paddle wheel,

Fig. 2 is an axial half section through this

22 M.

The paddle wheel along the line 11-11 in FIG. 1,

F i g. 3 a second embodiment in partial view,

F i g. 4 shows a detail along the line IV-IV in FIG. 3,

F i g. 5 and 6, respectively, show a partial view and a detail of a third embodiment,

7 shows a partial view of a fourth embodiment,

F i g. 8 is a partial view in section along the line VIII-VIII in Fig. 7,

9 and 10 and a partial view and a | ₀ partial section of a fifth embodiment,

F i g. 11 a fig. 9 corresponding partial view of a sixth embodiment and

F i g. 12 is a partial view of a seventh embodiment.

The exemplary embodiments show the application of the inventive concept to an impeller of a clutch, a torque converter or the like.

An impeller of this type has an inner ring shell 10, an outer ring shell 11 and numerous Individual blades 12 which are arranged essentially radially between the two ring shells.

In the embodiment according to FIG. 1, the individual blades 12 consist of flat disks, the curved ones Has outer edge projections 13 which are provided in recesses 14 provided in outer ring shell 10 are guided, and the curved inner edge has tabs 15, which through the in the inner ring shell 11 provided slots 16 are inserted therethrough; the tabs are on the inner surface of the inner ring shell turned over.

In this embodiment, the ends of those individual blades that are on the impeller axis next, inserted into radial slots 17 of a central ring shell 18.

From an annular shell 10 cross struts run to the other annular shell 11, the twisting movements of the prevent both ring shells in relation to each other.

In the pursuit of F i g. 1 and 2 are sheets 2C, which are from the contact point 21 of the outer ring shell 10 with a single blade 12 to the contact point 22 of the inner ring shell 11 with that of the single blade 12 adjacent single blades run obliquely.

In this embodiment, these metal sheets 20 are in pairs and approximately mirror images of one Single Scitaufel 12 provided.

These struts 20 are on the circumference with the largest diameter on the inner ring shell 11 and in uniform arc angular spacing, for example with an arc angular spacing of 120 °.

The metal sheets 20 are fixed to the ring shells 10, 11 by welding or soldering.

According to a modified embodiment, not shown, these sheets are at the contact points 21, 22 not attached but only pushed into it.

In the embodiment shown in FIG run the sheets 20 like sections of a coherent strip 25 with successive kinks 26, on which the direction of the tape

each time changes.

The kinks 26 are alternately in grooves, recesses 27 or the like in the outer ring shell 10 or in grooves, recesses 28 or the like in the inner ring shell 11; the recesses 27, 28 can be produced by milling or by pushing or pulling.

Due to the inclined plates 20, a mutual rotary movement of the ring shells 10, 11 in effectively prevented in relation to one another.

After the in Fi g. 3 and 4 illustrated embodiment, such rotary movements by angling the ends of individual individual blades 12 and setting the bevels 30 formed in this way on the Bowls 10,11 prevented.

These folds 30 are expediently bent between the ring shells 10, 11 because their radial extent in the area of their free ends is greater than their radial deflection in the area of the Bending zone. The clamping effect of the folds 30 after their insertion between cir-n ring shells can be so large that it is unnecessary to fix the folds on the ring shells; in this case the Folds arranged in pairs in opposite directions.

According to the embodiment shown in FIGS. 5 and 6, such bevels are present two adjacent individual blades 12 opposite one another and are each supported by a web 35 connected to one another, on the one hand on the folds and on the other hand on the ring shells 10, II is welded, soldered or otherwise fixed.

The web 35 has holes 36 through which the adjacent individual blades 12 circulating working fluid can pass.

According to the embodiment of FIG. 7 and 8, the struts are in the form of webs which possess in a radial plane of the impeller, a U-profile with its lateral wings on the ring shells 10, 't between two individual blades 12 are fixed.

In this embodiment, the webs run in front of one single blade 12 to the next and are also give away with openings; they can also be attached at a distance from the individual blades 12, their Hohlsei'e is directed to the outside of the wheel; however, the hollow side can also point to the inside of the wheel.

According to the F ⁷ i g. 9 and 10. 11, such cross struts are formed by radial extensions of the inner ring shell 11.

In FIGS. 9 and 10, outwardly directed extensions 38 and in FIG. 11 inward-facing Extensions 39 provided.

In either case, the extensions 38 and 39 the inner ring socket 11 with its location on the outer ring shell 10 by welding, soldering or? similar way set; they are also preferably provided with holes.

For this purpose 3 sheets of drawings

Claims (9)

Claims: ft · approx 1. Impeller for hydrodynamic torque transmission devices with between an outer (10) and a concentrically arranged inner ring shell (11) symmetrically on the Circumferentially distributed, approximately radially extending individual blades held by plug connections (12), characterized in that in addition to the individual blades (12) rigid connections (20,25,30,35,37,38,39) between the Outer (10) and the inner ring shell (11) are provided. 2. A bucket wheel according to claim 1, characterized in that the connections (20, 25) between adjacent <s two single blades (12) are arranged. 3. paddle wheel according to claim 1, characterized in that the connections (20,30,35,37,38,39) are separated from each other. 4. paddle wheel according to one of claims 1 to 3, characterized in that at least three Connections (20,30,35,37,38,39) are provided. 5. paddle wheel according to one of the preceding claims, characterized in that the connections (20, 25, 30, 35, 37, 38, 39) only extend over a partial area of the individual blades (12). 6. paddle wheel according to one of the preceding claims, characterized in that the connections from plate-shaped struts (20, 30, 35, 37,38,39) stand oest. 7. paddle wheel according to Ansp.uch 6, characterized in that that the struts (20) are arranged in pairs and mirror images of a Ki .izelschaufel (12) are. 8. paddle wheel according to one of claims 1 to 5, characterized in that the connections (38, 39) are integrally connected to the outer (11) or inner ring shell (10). 9. paddle wheel according to claim 6 or 7, characterized in that the struts (20) from the Connection point of a single blade (12) with the outer ring shell (10) to the connection point of . Neighboring blade with the inner ring shell (II) extend.