Vortex pump impeller blade

Abstract

The utility model relates to the field of fuel cell hydrogen circulating pumps, in particular to a blade of a vortex type pump impeller. Comprising an impeller, a plurality of arc-shaped blades are uniformly arranged on the outer side of the impeller along the circumference, each arc-shaped blade comprises a top surface, a working surface, a back surface and a side wall between the working surface and the back surface, the working surface is a concave surface, the back surface is a convex surface, and the side wall is a partial cylindrical surface parallel to the radius of the impeller. The side wall extending in the radius direction of the impeller and the working face formed by the concave face conform to the distribution rule of the relative speed of media in an impeller runner, the working face is large, and formation and development of vortex flow are facilitated. The back surfaces of the blades are convex surfaces, so that flow separation around the blades can be reduced. The radius of the cylindrical surface of the side wall does not exceed one fourth of the maximum thickness of the blade, energy loss of media near the edge of the blade can be reduced on the premise of ensuring the strength of the blade, the speed component of the media on the radial plane of the impeller is increased, and the pressure rise and efficiency of the vortex pump are improved.

Description

Technical field:

[0001] The utility model relates to the field of fuel cell hydrogen circulation pumps, in particular to a blade of a vortex pump impeller. Background technology:

[0002] At present, in the hydrogen circuit system of fuel cells, vortex hydrogen circulation pumps have been put into use with their unique advantages. The vortex hydrogen circulation pump mainly drives the blades to rotate through the high-speed rotating impeller, and the blades realize the pressurization of the gas in the annular flow channel. The current impeller has a structure such as the patent application with the publication number CN216554585U, which discloses a vortex type hydrogen circulation pump anti-blow-up impeller, which has a middle reinforcing rib along the circumference of the outer side of the impeller body, and the blades are arranged on both sides of the middle reinforcing rib. When the blades of this structure pressurize the gas in the annular flow channel, due to the presence of the reinforcing ribs, the working surface of the blade does not conform to the distribution law of the relative velocity of the medium in the impeller flow channel, and the working surface is small, which is not conducive to the formation of vortex flow, and the back of the blade is easy to cause the occurrence of flow separation around the blade, and the flow loss of the medium near the edge of the blade side wall is large, resulting in the pressure rise and efficiency of the vortex pump.

[0003] In summary, the impeller blade problem of the vortex hydrogen circulation pump has become a technical problem that urgently needs to be solved in the industry. Utility model content:

[0004] In order to make up for the deficiencies of the prior art, the utility model provides a blade of a vortex pump impeller, which solves the problems that the previous impeller blade has a small working surface, is not conducive to the formation of vortex flow, and has a large flow loss near the blade side wall.

[0005] The technical solution adopted by the utility model to solve the above technical problems is:

[0006] A blade of a vortex pump impeller includes an impeller, wherein a plurality of arc-shaped blades are evenly arranged along the circumference of the outer side of the impeller, wherein the arc-shaped blades include a top surface, a working surface, a back surface and a side wall between the working surface and the back surface, wherein the working surface is a concave surface, the back surface is a convex surface, and the side wall is a partial cylindrical surface parallel to the radius of the impeller.

[0007] The radius of the cylindrical surface of the side wall does not exceed one quarter of the maximum thickness of the arc-shaped blade.

[0008] The impeller and the arc-shaped blades are made of the same material, including metal or plastic.

[0009] The impeller and the arc-shaped blades are integrally cast, injection-molded or machined.

[0010] The utility model adopts the above scheme and has the following advantages:

[0011] By setting the working surface of the arc-shaped blade to be concave, the back surface to be convex, and the side wall to be a partial cylindrical surface parallel to the impeller radius, the side wall extending along the impeller radius and the working surface composed of the concave surface conform to the distribution law of the relative velocity of the medium in the impeller flow channel, and the large working surface is conducive to the formation and development of vortex flow. The back of the blade is convex, which can reduce the occurrence of flow separation around the blade. The radius of the side wall cylindrical surface does not exceed one-fourth of the maximum thickness of the blade, which can reduce the energy loss of the medium near the blade edge while ensuring the strength of the blade, increase the size of the velocity component of the medium on the radial plane of the impeller, and improve the pressure rise and efficiency of the vortex pump. Description of the drawings:

[0012] Figure 1 It is a three-dimensional structural schematic diagram of the utility model.

[0013] Figure 2 It is a three-dimensional enlarged structural schematic diagram of the blade part of the utility model.

[0014] Figure 3 It is a schematic diagram of the enlarged structure of the blade part of the utility model when viewed from above.

[0015] In the figure, 1, impeller, 2, curved blades, 3, top surface, 4, working surface, 5, back surface, 6, side wall. Specific implementation method:

[0016] In order to clearly illustrate the technical features of the present invention, the present invention is described in detail below through specific implementation methods and in conjunction with the accompanying drawings.

[0017] like Figure 1-3 As shown, a blade of a vortex pump impeller includes an impeller 1, and a plurality of arc-shaped blades 2 are evenly arranged along the circumference of the outer side of the impeller 1. The arc-shaped blades 2 include a top surface 3, a working surface 4, a back surface 5, and a side wall 6 between the working surface 4 and the back surface 5. The working surface 4 is a concave surface, the back surface 5 is a convex surface, and the side wall 6 is a partial cylindrical surface parallel to the radius of the impeller 1. The side wall 6 extending along the radial direction of the impeller 1 and the working surface 4 composed of the concave surface conform to the distribution law of the relative velocity of the medium in the impeller flow channel, and the previous reinforcing ribs are eliminated, and the working surface 4 is enlarged, which is conducive to the formation and development of vortex flow.

[0018] The cylindrical radius of the side wall 6 does not exceed one quarter of the maximum thickness of the arc blade 2. The cylindrical radius of the side wall 6 of the arc blade 2 is set to r, and the maximum thickness of the arc blade 2 is set to w, where r<0.25w. This design can reduce the energy loss of the medium near the blade edge while ensuring the strength of the arc blade 2, increase the size of the velocity component of the medium on the radial plane of the impeller, and improve the pressure rise and efficiency of the vortex pump.

[0019] The impeller 1 and the arc-shaped blades 2 are made of the same material, including metal or plastic. The metal material includes ZL101A aluminum alloy, which can be manufactured by integral casting or machining. Other metal materials commonly used in the field are also within the protection scope of the present utility model. The plastic material includes PEEK or LCP plastic, and other plastic materials commonly used in the field are also within the protection scope of the present utility model. It can be manufactured by integral injection molding or machining.

[0020] The above-mentioned specific implementation manner cannot be used as a limitation on the protection scope of the present utility model. For those skilled in the art, any replacement, improvement or change made to the implementation manner of the present utility model falls within the protection scope of the present utility model.

[0021] The matters not described in detail in the present invention are all known technologies to those skilled in the art.

Claims

1. A blade of a vortex pump impeller, characterized in that: It includes an impeller, the outer side of which is evenly provided with a plurality of arc-shaped blades along the circumference, the arc-shaped blades including a top surface, a working surface, a back surface and a side wall between the working surface and the back surface, the working surface is a concave surface, the back surface is a convex surface, and the side wall is a partial cylindrical surface parallel to the radius of the impeller.

2. The blade of a vortex pump impeller according to claim 1, characterized in that: The radius of the cylindrical surface of the side wall does not exceed one quarter of the maximum thickness of the arc-shaped blade.

3. The blade of a vortex pump impeller according to claim 1, characterized in that: The impeller and the arc-shaped blades are made of the same material, including metal or plastic.

4. The blade of a vortex pump impeller according to claim 1, characterized in that: The impeller and the arc-shaped blades are integrally cast, injection-molded or machined.

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