High-dynamic-balance double-layer impeller of electric air pump

Abstract

The high-dynamic-balance double-layer impeller of the electric air pump comprises an upper cover, a lower cover and a plurality of fan blades connecting the upper cover and the lower cover, an air inlet is formed in the upper cover, adjacent fan blades form a plurality of air channels communicated with the air inlet, and at least one of the bottom face of the upper cover and the top face of the lower cover is provided with a protruding part for preventing deformation. Compared with the prior art, the impeller has the advantages that the upper cover and the lower cover are not prone to deformation in the machining process, the dynamic balance of the impeller is improved, shaking and noise are reduced, and the situation that the impeller deforms in the machining and installing process and influences the quality of products is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of electric air pumps, in particular to a double-layer impeller with high dynamic balance for electric air pumps. Background Art

[0002] An electric air pump is an electric tool that uses a motor to drive the impeller to rotate and generate a directional airflow to inflate / deflate the product. The impeller is the core component of the electric air pump. The dynamic balance of the impeller directly affects the working efficiency and quality of the electric air pump. An impeller with poor dynamic balance will directly cause the negative impact of large vibration, reduced performance, and increased noise on the electric air pump. An impeller with good dynamic balance has a very positive effect on improving the quality of the electric air pump, reducing vibration and noise, and improving performance. In general, in order to pursue efficiency, the impeller usually adopts a double-layer structure. The double-layer impeller can effectively reduce return air, and compared with the single-layer impeller, the performance advantage is obvious.

[0003] For example, the Chinese utility model patent "A high-efficiency air duct dedicated to an electric vacuum pump" with patent publication number CN218347626U includes a main shell, a cover body, a partition and a fan wheel. The fan wheel is provided with partitions and a plurality of fan blades. The plurality of fan blades are connected to the partitions, and the plurality of fan blades are distributed in an array around the rotation axis of the fan wheel. An air duct is formed between adjacent fan blades. The air duct is located between the partitions and the partitions. A baffle is provided under the fan wheel. The plurality of fan blades are located between the partitions and the baffle. The partitions and the baffle limit the flow direction of gas in the air duct.

[0004] In the above solution, the fan blades are located between the partitions and the baffles, and the fan wheel, fan blades and baffles form a double-layer impeller. However, the partitions and baffles are completely flat, and deformation is very easy to occur during the production and processing process, resulting in unstable dynamic balance of the entire impeller, shaking, noise or other quality problems. Utility Model Content

[0005] The utility model aims at the problem that the partitions and baffles of the double-layer impeller of the electric air pump are completely flat, which is very easy to be deformed during the production and processing, resulting in unstable dynamic balance of the impeller. The technical problem to be solved by the utility model is to provide a double-layer impeller with high dynamic balance for an electric air pump to solve the above problem.

[0006] The technical solution adopted by the utility model to solve the above technical problems is: it includes an upper cover, a lower cover and a plurality of fan blades connecting the upper cover and the lower cover, the upper cover is provided with an air inlet, each adjacent fan blade forms a plurality of air ducts connected to the air inlet, and at least one of the bottom surface of the upper cover and the top surface of the lower cover is provided with a protrusion to prevent deformation.

[0007] A further preferred solution of the utility model is that the bottom surface of the upper cover is provided with a protrusion to prevent deformation.

[0008] A further preferred solution of the utility model is that the top surface of the lower cover is provided with a protrusion for preventing deformation.

[0009] A further preferred solution of the utility model is that both the bottom surface of the upper cover and the top surface of the lower cover are provided with protrusions for preventing deformation.

[0010] A further preferred solution of the utility model is that the raised portion is an arched curved surface.

[0011] A further preferred solution of the utility model is that the thickness of the raised portion gradually becomes thinner from the inside to the outside along the air duct, and the outer end surface of the raised portion is an inclined surface.

[0012] A further preferred solution of the utility model is that the plurality of fan blades are evenly distributed in a ring array around the axis of the upper cover and the lower cover.

[0013] A further preferred solution of the utility model is: the upper cover and the lower cover are provided with a connecting sleeve that penetrates the upper cover and the lower cover and is used to connect the drive motor, the axes of the connecting sleeve, the upper cover and the lower cover are colinear, and the inner end of the fan blade is fixedly connected to the side wall of the connecting sleeve.

[0014] A further preferred solution of the utility model is that one end of the connecting sleeve away from the upper cover is fixedly connected to the output end of the driving motor.

[0015] A further preferred solution of the utility model is that the one air duct is connected to a plurality of ventilation holes.

[0016] Compared with the prior art, the utility model has the following advantages: by providing a protrusion to prevent deformation on at least one of the bottom surface of the upper cover and the top surface of the lower cover of the existing double-layer impeller, the upper cover and the lower cover are not easily deformed during the processing, the dynamic balance of the impeller is improved, the jitter and noise are reduced, and the deformation of the impeller during processing and installation that affects the quality of the product is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be described in further detail below in conjunction with the accompanying drawings and preferred embodiments. However, those skilled in the art will appreciate that these drawings are drawn only for the purpose of explaining the preferred embodiments and should not be regarded as limiting the scope of the present invention. Furthermore, unless otherwise specified, the drawings only conceptually represent the composition or structure of the described objects and may contain exaggerated displays, and the drawings are not necessarily drawn to scale.

[0018] Figure 1 This is a schematic diagram of the three-dimensional structure of a preferred embodiment of the utility model;

[0019] Figure 2 This is a front view of a preferred embodiment of the utility model in which the bottom surface of the upper cover and the top surface of the lower cover are provided with raised portions;

[0020] Figure 3 This is a front view of a preferred embodiment of the utility model in which a raised portion is provided on the bottom surface of the upper cover;

[0021] Figure 4 This is a front view of a preferred embodiment of the utility model in which a raised portion is provided on the top surface of the lower cover;

[0022] Figure 5 It is a top view of a preferred embodiment of the utility model;

[0023] Figure 6 This is the preferred embodiment of the utility model Figure 5 The sectional three-dimensional structure diagram of AA.

[0024] In the figure: 1. upper cover; 2. lower cover; 3. connecting sleeve; 4. fan blades; 5. raised part; 6. air duct; 7. air inlet. DETAILED DESCRIPTION

[0025] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Those skilled in the art will appreciate that these descriptions are only descriptive and exemplary and should not be construed as limiting the protection scope of the present invention.

[0026] It should be noted that like reference numerals denote similar items in the following drawings, and thus, once an item is defined in one drawing, it may not be further defined or explained in subsequent drawings.

[0027] This embodiment mainly describes a double-layer impeller with high dynamic balance for an electric air pump, as follows:

[0028] like Figures 1 to 6 As shown, a double-layer impeller with high dynamic balance of an electric air pump includes an upper cover 1, a lower cover 2 and a plurality of blades 4 connecting the upper cover 1 and the lower cover 2. The upper cover 1 and the lower cover 2 are circular cover bodies with equal diameters. The upper cover 1 is provided with an air inlet 7. Each adjacent blade 4 forms a plurality of air ducts 6 connected with the air inlet 7. At least one of the bottom surface of the upper cover 1 and the top surface of the lower cover 2 is provided with a protrusion 5 to prevent deformation. There are three specific situations for the setting of the protrusion 5, such as Figure 3 As shown, the bottom surface of the upper cover 1 is provided with a protrusion 5 to prevent deformation, or as shown in Figure 4 As shown, the top surface of the lower cover 2 is provided with a protrusion 5 to prevent deformation, or as shown in FIG. Figure 2As shown, both the bottom surface of the upper cover 1 and the top surface of the lower cover 2 are provided with a protrusion 5 for preventing deformation. Preferably, both the bottom surface of the upper cover 1 and the top surface of the lower cover 2 are provided with a protrusion 5 for preventing deformation, which can prevent the upper cover 1 and the lower cover 2 from deforming during the processing. Since the upper cover 1 and the lower cover 2 of the double-layer impeller in the prior art are planes, they are very easy to deform during the production and processing. Therefore, the protrusion 5 for preventing deformation is provided according to the deformation direction of the upper cover 1 and the lower cover 2. After the protrusion 5 is provided, the upper cover 1 and the lower cover 2 are not easy to deform during the processing, which improves the dynamic balance of the impeller, reduces the vibration and noise, and reduces the deformation of the impeller during processing and installation that affects the quality of the product.

[0029] Specifically, the raised portion 5 is an arched surface, which partially or completely covers the upper cover 1 and the lower cover 2. Preferably, the arched surface completely covers the upper cover 1 and the lower cover 2. The arched surface completely covers the upper cover 1 and the lower cover 2 to prevent deformation of the upper cover 1 and the lower cover 2 to the greatest extent.

[0030] Specifically, the plurality of fan blades 4 are evenly distributed in a circular array around the axial center line of the upper cover 1 and the lower cover 2, and the plurality of fan blades 4, the upper cover 1 and the lower cover 2 together form a plurality of equal air ducts 6, so that the air intake volume of each air duct 6 is equal, which can improve the stability of the impeller during operation. In addition to the arched curved surface and the spherical surface setting, the raised portion 5 can also gradually become thinner from the inside to the outside along the air duct 6, and the outer end surface of the raised portion 5 is a slope.

[0031] like Figures 1 to 6 As shown, the upper cover 1 and the lower cover 2 are provided with a connecting sleeve 3 which penetrates the upper cover 1 and the lower cover 2 and is used to connect the driving motor (not shown in the figure). The axes of the connecting sleeve 3, the upper cover 1 and the lower cover 2 are collinear. The inner end of the fan blade 4 is fixedly connected to the side wall of the connecting sleeve 3. The end of the connecting sleeve 3 away from the upper cover 1 is fixedly connected to the output end of the driving motor (not shown in the figure). When in use, the driving motor (not shown in the figure) is started to drive the impeller to rotate.

[0032] Specifically, there are a plurality of air inlets 7, and the plurality of air inlets 7 are evenly distributed in a ring array around the connecting sleeve 3, and the one air duct 6 is connected to a plurality of ventilation holes.

[0033] Specifically, the double-layer impeller can be formed by one-time plastic injection molding, or can be welded into one piece by metal.

[0034] In the description of the present utility model, it should be noted that the terms "upper", "lower", "front", "back", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, or are the directions or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present utility model.

[0035] The above is a detailed introduction to a double-layer impeller with high dynamic balance for an electric air pump provided by the utility model. This article uses specific examples to illustrate the principle and implementation method of the utility model. The description of the above embodiments is only used to help understand the utility model and its core ideas. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the utility model, the utility model can also be improved and modified. These improvements and modifications also fall within the scope of protection of the claims of the utility model.

Claims

1. A double-layer impeller with high dynamic balance for an electric air pump, comprising an upper cover, a lower cover and a plurality of blades connecting the upper cover and the lower cover, wherein the upper cover is provided with an air inlet, and each adjacent blade forms a plurality of air ducts connected to the air inlet, characterized in that: At least one of the bottom surface of the upper cover and the top surface of the lower cover is provided with a convex portion for preventing deformation.

2. The highly dynamically balanced double-layer impeller of an electric air pump according to claim 1, characterized in that: The bottom surface of the upper cover is provided with a convex portion for preventing deformation.

3. The highly dynamically balanced double-layer impeller of an electric air pump according to claim 1, characterized in that: The top surface of the lower cover is provided with a convex portion for preventing deformation.

4. The highly dynamically balanced double-layer impeller of an electric air pump according to claim 1, characterized in that: The bottom surface of the upper cover and the top surface of the lower cover are both provided with convex parts for preventing deformation.

5. A highly dynamically balanced double-layer impeller for an electric air pump according to any one of claims 1 to 4, characterized in that: The raised portion is an arched curved surface.

6. A highly dynamically balanced double-layer impeller for an electric air pump according to any one of claims 1 to 4, characterized in that: The thickness of the raised portion gradually becomes thinner from the inside to the outside along the air duct, and the outer end surface of the raised portion is an inclined surface.

7. The highly dynamically balanced double-layer impeller of an electric air pump according to claim 1, characterized in that: The plurality of fan blades are evenly distributed in a circular array around the axis of the upper cover and the lower cover.

8. The highly dynamically balanced double-layer impeller of an electric air pump according to claim 1, characterized in that: The upper cover and the lower cover are provided with a connecting sleeve which penetrates the upper cover and the lower cover and is used to connect the drive motor. The axes of the connecting sleeve, the upper cover and the lower cover are in a collinear line, and the inner end of the fan blade is fixedly connected to the side wall of the connecting sleeve.

9. The highly dynamically balanced double-layer impeller of an electric air pump according to claim 8, characterized in that: One end of the connecting sleeve away from the upper cover is fixedly connected to the output end of the driving motor.

10. The highly dynamically balanced double-layer impeller of an electric air pump according to claim 1, characterized in that: The one air duct is communicated with a plurality of ventilation holes.

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