Impeller for radial ventilation device

Abstract

An impeller 1 for a radial ventilation device for conveying a gaseous fluid, the impeller 1 comprising: a chassis 2; the invention relates to an impeller 1, comprising a base plate 2, a top plate 3, the top plate 3 being arranged at a distance from the base plate 2 in the axial direction 15 of the impeller 1, the top plate 3 and / or the base plate 2 having at least one punched groove 5, in particular a plurality of punched grooves 5; at least one blade 7 is arranged between the top disc 3 and the bottom disc 2 and is fixed in the area and the course of at least one groove 5, and the surface course of the groove 5 is consistent with the surface course of the blade 7 fixed on the groove 5 at least on the enveloping surface. Therefore, the conveying effect of the groove 5 at least corresponds to the conveying effect of the blade surface 8 which is reduced by the groove 5.

Description

Technical Field

[0001] The invention relates to the technical field of impellers for conveying gaseous fluids for radial ventilation devices. Background Art

[0002] Impellers for radial fans are already known to those skilled in the art from the prior art.

[0003] Document EP 2 846 046 A1 discloses, for example, a fan impeller for conveying a gaseous fluid, which has a plurality of blades, which are arranged in an annular space volume at a constant angle around the rotation axis, and the blades are fixed to a support with their axially opposite end regions, respectively. It is characterized in that at least one blade has an edge region that is surrounded in an especially frame-shaped manner and at least one inner region surrounded by the edge region, wherein at least one groove is constructed along an at least L-shaped, preferably U-shaped, especially surrounding curve between the edge region and the inner region, and / or wherein the edge region is defined by a first blade surface and the inner region is defined by a second blade surface, which is arranged and / or constructed differently from the first blade surface in terms of geometric structure.

[0004] Furthermore, impellers for radial fans are known which comprise a flat base plate and a top plate to which blades are fastened.

[0005] The disadvantage here is that, for example, an increase in the speed stability is accompanied by a loss in the delivery effect of the impeller, or an increase in the delivery effect has a negative impact on the speed stability. Summary of the invention

[0006] The technical object of the present invention is therefore to improve the rotational speed stability while maintaining at least the same conveying effect of the impeller of the radial fan.

[0007] This technical task is achieved by a subject matter having the following features. Advantageous embodiments are the solutions described below.

[0008] It is provided within the meaning of the invention that the proposed configuration can relate to all components of an impeller, for example made of metal, but also to only individual components of the impeller. Components of an impeller within the meaning of the invention can be understood as a top disk, a bottom disk and blades. It is further provided within the meaning of the invention that the proposed configuration can relate to all blades of an impeller, but also to only individual blades of an impeller. In other words, the configuration of only one of the aforementioned components can be advantageous, but the configuration of all components achieves the most advantages.

[0009] In the sense of the present invention, the width of a groove is understood to mean the width in a plan view of the impeller in the axial viewing direction.

[0010] Furthermore, within the meaning of the present invention, the height of a recess may be understood to mean a positive or negative height in the axial direction starting from the top disk and / or the bottom disk of the impeller.

[0011] According to one aspect, the technical task of the present invention is solved by an impeller of a radial ventilation device, which is used to convey gaseous fluid, and the impeller includes: a base plate; a top plate, wherein the top plate is arranged at a distance from the base plate in the axial direction of the impeller, wherein the top plate and / or the base plate have at least one stamped groove, in particular a plurality of stamped grooves; a plurality of blades, wherein at least one blade is arranged between the top plate and the base plate and fixed in the area and direction of at least one groove, wherein the surface direction of the groove is consistent with the surface direction of the blade fixed on the groove at least on the envelope surface, so that the conveying effect of the groove at least corresponds to the conveying effect of the blade surface reduced by the groove.

[0012] In the sense of the present invention, an envelope surface may be understood, for example, as a contour or a surface which encloses an object surrounded thereby, for example a blade.

[0013] Advantageously, this allows the blades to be shortened on the one hand and the chassis to be reinforced at the same time. It can be provided, for example, that a groove is punched into the top and / or bottom plate in the direction of the blade. The blade is then placed on, at, or on the groove and is shortened and matched in shape, so that the lever ratio generated during operation of the impeller can be improved and the transition between the blade and the top and / or bottom plate can be eliminated. This can reduce the stresses generated in the entire impeller during operation of the impeller. In particular, the stresses introduced from the blades into the top and / or bottom plate can be advantageously reduced. This can increase the strength of the impeller and thus achieve higher rotational speeds and higher peripheral speeds.

[0014] Additionally, costs can be reduced and a greater flexibility in the design of the impeller can be achieved.

[0015] In a technically advantageous embodiment of the impeller, it is provided that the blades are arranged on the grooves, in particular at the grooves, preferably in the grooves.

[0016] This can additionally increase the flexibility in the manufacture of the impeller.

[0017] In a further technically advantageous embodiment of the impeller, it is provided that the groove is punched along the contour of the blade, in particular along the contour of an edge region of the blade adjacent to the top disk or the bottom disk.

[0018] Advantageously, this can additionally improve the stability and strength of the impeller.

[0019] Furthermore, in a further technically advantageous embodiment of the impeller, it is provided that the height of the recess changes in the radial direction of the impeller and in particular increases.

[0020] As a result, special requirements when using the impeller can be taken into account and the production can be adapted accordingly in order to additionally achieve an increase in the strength of the impeller.

[0021] Furthermore, in a further technically advantageous embodiment of the impeller, it is provided that the height of the recess corresponds to one tenth, in particular one fifteenth, in particular one twentieth, most preferably one fiftieth of the distance between the bottom disk and the top disk.

[0022] This can also additionally increase the possibilities for production taking into account the given application requirements.

[0023] Furthermore, in a further technically advantageous embodiment of the impeller, it is provided that the width of the groove changes in the radial direction of the impeller and in particular increases.

[0024] This can also additionally make it possible to increase the stability and strength of the impeller and to provide flexible options for production in accordance with the requirements imposed by the use of the impeller.

[0025] Furthermore, in a further technically advantageous embodiment of the impeller, it is provided that the groove is interrupted in the radial direction of the impeller, in particular is formed only partially.

[0026] This can additionally provide advantageous possibilities for the production of the impeller and for the use of the impeller.

[0027] Furthermore, in a further technically advantageous embodiment of the impeller, it is provided that the groove, in particular the sides of the groove, are designed parallel to or contoured to the blade, preferably the contour of the blade.

[0028] In other words, the shape of the recess can be parallel to the blade, but the shape of the recess can also have a profiled shape, for example arranged in the middle of the blade, which can additionally have a favorable influence on the stability and strength of the impeller.

[0029] Furthermore, in a further technically advantageous embodiment of the impeller, it is provided that the groove has a pressure-side course, in particular a pressure-side contour course, which differs from a suction-side course, in particular a suction-side contour course, of the groove.

[0030] This may also advantageously allow for more flexible manufacturing to improve the stability and strength of the impeller.

[0031] Furthermore, in a further technically advantageous embodiment of the impeller, it is provided that the groove, in particular the groove outlet of the groove, has a preferably partially continuous-curvature transition into the bottom disk and / or the top disk.

[0032] In areas that are subject to heavy loads, this can advantageously contribute to additional stability.

[0033] Furthermore, in a further technically advantageous embodiment of the impeller, it is provided that the fixings for the blades are formed by means of a welded connection and / or a strapped connection and / or a screwed connection and / or a riveted connection and / or an adhesive connection and / or a caulking connection, wherein the fixings are in particular arranged on the pressure side and / or the suction side of the blades.

[0034] The advantages already mentioned can thereby be combined with the advantages of advantageous production or production adapted to given requirements.

[0035] Furthermore, in a technically advantageous embodiment of the impeller, it is provided that the fixing element is of multi-part construction, wherein at least one first part of the fixing element is constructed between the blade and the base disk and at least one second part of the fixing element is constructed between the blade and the groove, or wherein at least one first part of the fixing element is constructed between the blade and the top disk and at least one second part of the fixing element is constructed between the blade and the groove.

[0036] Advantageously, the blade can thereby be mounted in a particularly stable manner on the base or top wall of the groove and a greater flexibility in production can thereby be achieved.

[0037] Furthermore, in a further technically advantageous embodiment of the impeller, it is provided that the blades are arranged between groove pairs, wherein the groove pairs comprise a first groove and a second groove, wherein the first groove is formed on the top disk and the second groove is formed on the bottom disk, wherein in particular the first groove and / or the second groove are formed according to the grooves in one of the aforementioned embodiments.

[0038] According to a further aspect, the technical task of the invention is achieved by a radial ventilation device comprising a housing, a motor, in particular a control device, and an impeller for conveying a gaseous fluid, characterized in that the impeller is constructed according to one of the above-described embodiments.

[0039] This also makes it possible to additionally improve flexibility in production and increase strength. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Exemplary embodiments of the invention are schematically shown in the drawings and are described in detail below.

[0041] In the attached figure:

[0042] Figure 1 A perspective view of an impeller is shown;

[0043] Figure 2 showing a further perspective view of the impeller;

[0044] Figure 3 showing a further perspective view of the impeller;

[0045] Figure 4 A top view of the chassis is shown;

[0046] Figure 5 A top view showing the chassis with blades; and

[0047] Figure 6 A top view of the chassis with blades is shown. DETAILED DESCRIPTION

[0048] exist Figure 1 1 is a perspective view of an impeller for conveying a gaseous fluid of a radial ventilator, the impeller comprising: a base plate 2; a top plate 3, wherein the top plate 3 is arranged at a distance from the base plate 2 in the axial direction of the impeller 1 and is arranged at a distance 4 between the base plate 2 and the top plate 3, wherein the top plate 3 and the base plate 2 have at least one punched groove 5, in particular a plurality of punched grooves 5; a plurality of blades 7, wherein at least one blade 7 is arranged between the top plate 3 and the base plate 2 and is fixed in the region and direction of at least one groove 5, wherein the surface direction of the groove 5 is consistent with the surface direction of the blade fixed to the groove 5 at least on the envelope surface, so that the conveying effect of the groove 5 at least corresponds to the conveying effect of the blade surface 8 reduced by the groove. The blade 7 can thereby be advantageously shortened and the base plate 2 and / or the top plate 3 can be reinforced at the same time.

[0049] In addition, Figure 1 , the blade 7 is arranged on the groove 5. The groove 5 is punched along the contour of the blade 9, in particular along the contour of the edge region of the blade adjacent to the top plate 3 or the bottom plate 2. It is also shown that the groove 5, in particular the groove outlet 6a of the groove 5, has a transition with a continuous curvature into the bottom plate 2 and the top plate. The fixing part 12 of the blade 7 is constructed by means of a welded connection, wherein the fixing part 12 is arranged on the pressure side and the suction side of the blade. Figure 1 , the blade 5 is arranged between a groove pair (not shown), wherein the groove pair comprises a first groove 13 and a second groove 14, wherein the first groove 13 is formed on the top plate 3 and the second groove 14 is formed on the bottom plate 2. Advantageously, this can achieve a reinforcement of the impeller and an optimization of the leverage ratio and the stresses in the entire impeller.

[0050] In particular, forces introduced into the top disk and / or the bottom disk by means of the blades during operation can advantageously be reduced.

[0051] In addition, Figure 1, the fixing element 12 is constructed in multiple parts, wherein a first part 16 of the fixing element of the blade 7 is constructed between the blade 7 and the top plate 3, and at least one second part 17 of the fixing element is constructed between the blade 7 and the groove 5. Advantageously, the stability of the blade 7 on the top plate 3 can be improved thereby.

[0052] exist Figure 2 Similar to Figure 1 1 shows a further perspective view of the impeller. The height 10 of the groove 5 changes in the radial direction of the impeller and increases outwards. Figure 1 and 2 land, in Figure 3 , the height 10 of the groove 5 decreases outwards. The height of the groove 5 corresponds here to one tenth, preferably one eighth, preferably one sixth of the distance 4 between the bottom plate 2 and the top plate 3. This advantageously allows higher speeds and higher rotational speeds to be achieved at the same delivery power.

[0053] exist Figure 4 1 shows a top view of a base plate 2 with a groove 5, similar to the other figures. The width 11 of the groove 5 changes in the radial direction of the impeller and decreases outwards. It is also shown that the groove 5 has a pressure side course, in particular a pressure side profile course, which is different from the suction side course of the groove 5, in particular the suction side profile course of the groove 5. In an overview with the other figures, it is also shown that the groove 5 is relatively Figures 1 to 3 The blades 7 shown in FIG. 7 are designed to be parallel or contoured.

[0054] exist Figure 5 and 6 In the figure, in an overview with the other figures, an axial top view of a chassis 2 is shown, which has blades 7 arranged on the chassis by means of fastening elements 12. The width 11 of the groove 5 is Figure 5 The radially outer edge of the chassis 2, that is, the ... Figure 1 The radially outer edge of the impeller 1 shown in FIG. 1 is reduced. Figure 6 Similar to Figure 5 An embodiment is shown in which the width 11 of the groove 5 decreases toward the edge, ie increases in radial direction outwards. The advantages described above also apply here.

[0055] List of Reference Numerals

[0056] 1 Impeller

[0057] 2 Chassis

[0058] 3 Top plate

[0059] 4 Distance between bottom plate and top plate

[0060] 5 Grooves

[0061] 6 Grooved surface

[0062] 6a Groove outlet

[0063] 7 blades

[0064] 8 Blade surface

[0065] 9 Blade profile

[0066] 10 Groove height

[0067] 11 Groove Width

[0068] 12 Blade fixings

[0069] 13 First groove

[0070] 14 Second groove

[0071] 15 Axial direction of impeller

[0072] 16 First part of the fixing

[0073] 17 Second part of the fixing.

Claims

1. An impeller (1) for a radial ventilation device, which is used to convey a gaseous fluid, the impeller (1) comprising: Chassis (2), Top plate (3), The top plate (3) is arranged at a distance from the bottom plate (2) in the axial direction (15) of the impeller (1). The top plate (3) and / or the bottom plate (2) have at least one punched groove (5), in particular a plurality of punched grooves (5), a plurality of blades (7), wherein at least one blade (7) is arranged between the top plate (3) and the bottom plate (2) and is fixed in the region and in the direction of at least one groove (5), It is characterized in that The surface profile of the groove (5) is consistent with the surface profile of the blade (7) fixed to the groove (5) at least on the envelope surface, so that the conveying effect of the groove (5) at least corresponds to the conveying effect of the blade surface (8) reduced by the groove (5).

2. The impeller (1) according to claim 1, characterized in that The blade (7) is arranged on the groove (5), in particular at the groove (5), preferably in the groove (5).

3. An impeller (1) according to any one of the preceding claims, characterized in that The groove (5) is punched along the contour of the blade (9), in particular along the contour of an edge region of the blade (7) adjacent to the top plate (3) or the bottom plate (2).

4. An impeller (1) according to any one of the preceding claims, characterized in that The height (10) of the recess (5) changes in the radial direction of the impeller (1) and in particular increases.

5. An impeller (1) according to any one of the preceding claims, characterized in that The height (10) of the groove (5) corresponds to one tenth, in particular one fifteenth, in particular one twentieth, most preferably one fiftieth of the distance (4) between the bottom plate (2) and the top plate (3).

6. An impeller (1) according to any one of the preceding claims, characterized in that The width (11) of the groove (5) changes in the radial direction of the impeller (1) and in particular increases.

7. An impeller (1) according to any one of the preceding claims, characterized in that The groove (5) is interrupted in the radial direction of the impeller (1), in particular only partially.

8. An impeller (1) according to any one of the preceding claims, characterized in that The groove (5), in particular the sides of the groove (5), are designed parallel to or contoured to the blade (7), preferably to the contour of the blade (7).

9. An impeller (1) according to any one of the preceding claims, characterized in that The groove (5) has a pressure-side course, in particular a pressure-side contour course, which is different from a suction-side course of the groove (5), in particular a suction-side contour course of the groove (5).

10. An impeller (1) according to any one of the preceding claims, characterized in that The groove (5), in particular the groove outlet (6a) of the groove (5), has a preferably partially curvature-continuous transition into the bottom wall (2) and / or the top wall (3).

11. An impeller (1) according to any one of the preceding claims, characterized in that The fixing part (12) of the blade (7) is formed by means of a welding connection and / or a tying connection and / or a screw connection and / or a riveted connection and / or an adhesive connection and / or a caulking connection, wherein the fixing part (12) is particularly arranged on the pressure side and / or the suction side of the blade (7).

12. The impeller (1) according to claim 11, characterized in that The fixing element (12) is constructed in multiple parts. wherein at least one first portion (16) of the fixing member (12) is configured between the blade (7) and the chassis (2), and at least one second portion (17) of the fixing member (12) is configured between the blade (7) and the groove (5), Or wherein at least one first portion (16) of the fixing member (12) is constructed between the blade (7) and the top plate (3), and at least one second portion (17) of the fixing member (12) is constructed between the blade (7) and the groove (5).

13. An impeller (1) according to any one of the preceding claims, characterized in that The blade (7) is arranged between the groove pairs, The groove pair comprises a first groove (13) and a second groove (14). The first groove (13) is configured on the top plate (3), and the second groove (14) is configured on the bottom plate (2). In particular, the first groove (13) and / or the second groove (14) are configured according to the groove of one of the preceding claims.

14. A radial ventilation device comprising a housing, a motor, in particular a control device, and an impeller (1) for conveying a gaseous fluid, characterized in that: The impeller (1) is constructed according to any of the preceding claims.

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