Impeller with blade type blades

Abstract

The impeller comprises a hub and a plurality of blades arranged on the peripheral side of the hub, the blades are evenly distributed along the peripheral side of the hub at intervals, annular fins are coaxially arranged outside the hub, and the ends, away from the hub, of the blades are connected into a whole through the annular fins. And an internal flow guide cavity is formed among the blades, the hub and the annular fins. The ends, away from the hub, of the multiple blades are connected into a whole through the annular fins, so that the structural strength of the blades is ensured on the premise that the blades are integrally thin, and the purpose of ensuring the rigid strength of the impeller blades on the premise that the thickness of the blades is reduced to ensure the working efficiency of the blades can be achieved.

Description

Technical Field

[0001] This application relates to the field of water pump technology, and in particular to an impeller with blade-type blades. Background Technology

[0002] like Figure 1 As shown, the working efficiency of a water pump impeller or propeller impeller is mainly reflected in two aspects: first, whether the design of the impeller blade inclination angle α matches the flow velocity and rotational speed; and second, the size of the blade water-cutting angle. Since the blade has a certain thickness, the blade water-cutting angle β should be designed as small as possible to reduce water resistance. In other words, the smaller the water-cutting angle β, the higher the impeller efficiency. However, the average thickness of the blade at the water-cutting angle β is also thinner, and the strength will be lower.

[0003] For general high-flow axial flow pumps, in order to achieve high blade rigidity, the blade thickness must be increased. However, this not only increases the overall weight of the impeller, but also significantly changes the optimal design angle of the inlet angle, reducing the working efficiency of the impeller, which is an area that needs improvement. Utility Model Content

[0004] In order to ensure the rigidity and strength of the impeller blades while reducing the blade thickness to ensure its working efficiency, this application provides an impeller with blade-type blades.

[0005] This application provides an impeller with blade-type blades, which adopts the following technical solution:

[0006] An impeller with blade-type blades includes a hub and a plurality of blades disposed around the hub. The plurality of blades are evenly distributed at intervals along the circumference of the hub. An annular fin is coaxially disposed outside the hub. The annular fin connects the ends of the plurality of blades away from the hub into a whole. An internal flow guide cavity is formed between the blades, the hub and the annular fin.

[0007] By adopting the above technical solution, during use, the suspended parts of all blades away from the hub are connected into a whole by the annular fins. Combined with the structural support at the connection between the hub and the blades, the blades can be subjected to very little stress and deformation even when they are very thin. This reduces the change in the blade's water inlet angle, thereby greatly improving the blade's water pushing efficiency and ensuring that the blades have high strength even when they are very thin.

[0008] Preferably, a weight-reducing groove is provided at one end of the wheel hub.

[0009] By adopting the above technical solution, the weight of the impeller is reduced on the one hand, and the processing cost is also reduced on the other hand, through the setting of the weight reduction groove.

[0010] Preferably, the weight-reducing groove is provided with reinforcing ribs, the reinforcing ribs are provided in plurality, and the reinforcing ribs are evenly distributed along the periphery of the hub.

[0011] By adopting the above technical scheme, when in use, the weight-reducing groove inner wall is supported by the reinforcing ribs, so as to ensure the structural strength of the hub and the structural strength of the blade connected to the hub.

[0012] Preferably, the hub is provided with a guide slope at the edge of the end away from the weight-reducing groove.

[0013] By adopting the above technical scheme, when in use, the guide slope is provided to guide the water flow, so as to ensure the working efficiency of the impeller.

[0014] Preferably, the hub is provided with a connecting hole for connecting the driving shaft, and the connecting hole is provided with a key groove on the inner wall.

[0015] By adopting the above technical scheme, when in use, the external driving shaft is connected through the key groove, so as to facilitate the use of the impeller.

[0016] Preferably, the end of the blade away from the hub is located outside the annular fin after penetrating the annular fin.

[0017] By adopting the above technical scheme, when in use, the blade is divided into two parts by the annular fin, so as to ensure the structural strength of the blade without affecting the normal water-pushing effect of the impeller.

[0018] Preferably, the part of the blade outside the annular fin is provided as a cutting part, and the thickness of the end of the cutting part in the rotation direction is less than the thickness of the middle part.

[0019] By adopting the above technical scheme, when in use, the water flow is cut and guided by the end of the cutting part in the rotation direction during the rotation of the impeller, so as to ensure the rotation effect of the impeller and the water-pushing effect of the impeller.

[0020] Preferably, the cutting part is located between the two axial ends of the annular fin.

[0021] By adopting the above technical scheme, when in use, the structure of the annular fin penetrating the end of the blade avoids the turbulence near the annular fin of the blade.

[0022] In summary, the present application has at least one of the following beneficial technical effects:

[0023] 1. The ring fin connects all the blades to the hub at the end of the overhanging part of the blade, and the structure of the hub and the blade connection supports the blade, so that the blade can be very thin and still have a small stress deformation, thus reducing the change in the blade water inlet angle, thereby greatly improving the blade water pushing efficiency, and ensuring that the blade has high strength in a very thin condition;

[0024] 2. By setting the lightening groove and the reinforcing rib, the overall weight of the impeller is reduced, and the structural strength of the hub is ensured, thereby ensuring the structural strength of the hub and the blade connection;

[0025] 3. The structure of the ring fin through the end of the blade avoids the generation of turbulence near the ring fin during the rotation of the impeller. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 is a schematic diagram of the impeller structure in the background of the present application;

[0027] Figure 2 is an axonometric schematic diagram of the impeller structure in the embodiment of the present application;

[0028] Figure 3 is a schematic diagram of the lateral structure of the impeller in the embodiment of the present application;

[0029] Figure 4 is an axonometric schematic diagram of the hub structure in the embodiment of the present application.

[0030] Reference signs: 1, hub; 2, blade; 21, cutting part; 3, ring fin; 4, lightening groove; 5, reinforcing rib; 6, guide slope; 7, connecting hole; 8, key groove. DETAILED DESCRIPTION

[0031] The following will be described in detail below Figure 2 - the Figure 4 The present application will be further described in detail.

[0032] The embodiment of the present application discloses an impeller with a blade type blade.

[0033] Reference Figure 2 and Figure 3The impeller with the blade type blade comprises a cylindrical hub 1, a plurality of blades 2 are uniformly arranged on the circumferential side of the hub 1, in the embodiment, the blades 2 are preferably arranged as four, one end of any blade 2 is welded and fixed with the outer side wall of the hub 1, and the connecting line of the blade 2 and the hub 1 is spirally arranged on the circumferential side of the hub 1, the other end of the blade 2 is arranged as a suspension, an annular fin 3 is coaxially arranged outside the hub 1, in the embodiment, the annular fin 3 is arranged as a thin-walled ring structure, the annular fin 3 is welded and fixed with the blade 2 close to the suspension end, and the end of the blade 2 away from the hub 1 is located outside the annular fin 3 after penetrating through the annular fin 3.

[0034] Referring to Figure 2 and Figure 3 In use, the suspension ends of the blades 2 are all connected into a whole through the annular fin 3, the internal flow guide cavity is formed between the annular fin 3, the hub 1 and the blade 2, and the external flow guide cavity is formed between the outer side wall of the annular fin 3 and the suspension end of the blade 2, so that the suspension end of the blade 2 is supported through the annular fin 3 in the process of rotation of the impeller, the structural strength of the blade 2 is increased through the annular fin 3 in the case that the blade 2 is designed to be thin, the situation that the suspension end of the blade 2 is deformed under pressure is reduced, and the water pushing efficiency of the impeller is ensured.

[0035] Referring to Figure 2 and Figure 3 In the application, the part of the blade 2 located outside the annular fin 3 is arranged as a cutting part 21, the thickness of the two ends of the cutting part 21 in the rotation direction is smaller than the thickness of the middle part, that is, the cutting part 21 of the blade 2 is arranged as a blade type structure with thin sides and thick middle, so that the water flow is cut and divided through the thin sides of the blade 2 in the process of rotation of the impeller, the water flow is guided to flow from the surface of the blade 2, and the water pushing effect in the process of rotation of the impeller is ensured.

[0036] Referring to Figure 2 and Figure 3 In addition, the whole blade 2 is located between the two end faces in the axial direction of the annular fin 3, that is, the upper and lower ends of the annular fin 3 protrude out of the blade 2; in actual use, the structure design that the annular fin 3 completely penetrates through the blade 2 region avoids the turbulence at the position of the blade 2 close to the annular fin 3, in the embodiment, the end face of the annular fin 3 is slightly higher than the blade 2, and the invalid weight of the impeller in the production process is reduced.

[0037] Referring to Figure 2 At the same time, the connecting hole 7 is coaxially arranged on the hub 1, the key groove 8 is arranged on the inner wall of the connecting hole 7, and the guide inclined surface 6 is formed at one end in the axial direction of the hub 1; in use, the coaxial connection of the driving shaft and the impeller is facilitated through the arrangement of the connecting hole 7 and the key groove 8, the water flow is guided through the arrangement of the guide inclined surface 6, and the water pushing efficiency of the impeller is ensured.

[0038] Referring to Figure 2 and Figure 4 In order to reduce the invalid weight of the impeller while ensuring the structural strength of the impeller, a lightening groove 4 is formed at the other end of the hub 1 in the axial direction, and a plurality of reinforcing ribs 5 are arranged in the lightening groove 4. The reinforcing ribs 5 are evenly distributed along the axial direction of the hub 1, i.e., the reinforcing ribs 5 divide the lightening groove 4 into multiple areas, thereby supporting the inner wall of the lightening groove 4 through the reinforcing ribs 5, so as to ensure the structural strength of the hub 1 and the connection between the hub 1 and the blade 2. In combination with the support of the annular fin 3 on the suspended end of the blade 2, the stress deformation of the thin blade 2 during operation can be reduced.

[0039] The implementation principle of the embodiment of the present application is as follows: during use, the water cutting angle of the impeller is reduced by the thin blade 2, thereby increasing the water pushing efficiency of the impeller. During rotation of the impeller, the root of the blade 2 is obliquely supported by the reinforcing ribs 5 and the hub 1, and the suspended end of the blade 2 is supported by the annular fin 3, thereby ensuring the structural strength of the blade 2 on the basis of ensuring the water pushing efficiency during rotation of the impeller, which is more beneficial to use.

[0040] The above are preferred embodiments of the present application, and do not limit the protection scope of the present application. Therefore, equivalent changes made on the basis of the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. An impeller with blade-like blades, characterized in that: It includes a hub (1) and several blades (2) arranged around the hub (1). The blades (2) are evenly distributed around the hub (1). An annular fin (3) is coaxially arranged outside the hub (1). The annular fin (3) connects the ends of the blades (2) away from the hub (1) into a whole. An internal flow guide cavity is formed between the blades (2), the hub (1) and the annular fin (3).

2. The impeller with blade-type blades according to claim 1, characterized in that: The hub (1) has a weight-reducing groove (4) at one end.

3. An impeller with blade-type blades according to claim 2, characterized in that: The weight reduction groove (4) is provided with reinforcing ribs (5), and there are several reinforcing ribs (5), which are evenly distributed along the circumference of the hub (1).

4. An impeller with blade-type blades according to claim 2, characterized in that: The hub (1) has a guide slope (6) on the edge away from the weight reduction groove (4).

5. An impeller with blade-type blades according to claim 1, characterized in that: The hub (1) has a connecting hole (7) for connecting the drive shaft, and the inner wall of the connecting hole (7) has a keyway (8).

6. An impeller with blade-type blades according to claim 1, characterized in that: The end of the blade (2) away from the hub (1) passes through the annular fin (3) and is located outside the annular fin (3).

7. An impeller with blade-type blades according to claim 6, characterized in that: The portion of the blade (2) located outside the annular fin (3) is configured as a cutting section (21), and the thickness of the two ends of the cutting section (21) in the rotation direction is less than the thickness of the middle part.

8. An impeller with blade-type blades according to claim 7, characterized in that: The cutting section (21) is located between the two ends of the annular fin (3) along its axial direction.

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