Impeller of dust collector

Abstract

The utility model relates to the field of impellers, in particular to a dust collector impeller. Comprising a wheel disc, the wheel disc is provided with a plurality of blades, and the blades are spirally arranged around the axis of the wheel disc; air inlets are formed in one sides of the wheel disc and the blades, and air outlets are formed in the other sides; an airflow channel is formed between the air inlet and any air outlet; wherein each blade is provided with a wheel disc line and a wheel cover line, and the wheel disc lines and the wheel cover lines are arranged to be Bezier curves; an included angle theta is formed between a connecting line between the end points, close to the air outlet, of the wheel disc line and the wheel cover line and the axis of the impeller, and the included angle theta enables the blades to have parts exceeding the outer edge face of the wheel disc on plane projections, perpendicular to the axis, of the blades and the wheel disc. According to the impeller, the blades and the wheel disc of the impeller are manufactured in an integrated forming mode, compared with traditional plug-in type blades, assembly tolerance does not exist between the blades, the dynamic load is reduced, and the impeller has the higher rotating speed.

Description

Technical Field

[0001] The utility model relates to the field of impellers, in particular to an impeller for a vacuum cleaner. Background Art

[0002] Impellers are widely used in various industries. For example, they can be used in aircraft engines, vacuum cleaners and ventilation equipment. Taking a vacuum cleaner as an example, the impeller is one of the core components of the motor. Its function is to suck in fluid through high-speed rotation of the impeller and then discharge it after pressurization. After the fluid contacts the blades on the impeller and the flow channel between the blades, the fluid is accelerated and discharged to form a negative pressure to achieve the effect of dust collection.

[0003] However, the blades on the vacuum cleaner impeller in the prior art are mostly connected to the wheel disc by plugging, which leads to different assembly errors between the blades, and generates additional dynamic loads when the impeller is running, thereby affecting the impeller speed. There is also the problem that the impeller does less work on the airflow, resulting in weak suction. Utility Model Content

[0004] The utility model aims to provide a vacuum cleaner impeller to solve the problems in the prior art that the impeller has a low rotation speed and low work done on the airflow.

[0005] The technical solution of the utility model is: a vacuum cleaner impeller, comprising a wheel disc, on which blades are arranged, wherein the blades are arranged in a plurality and are arranged in a spiral shape around the axis of the wheel disc; one side of the wheel disc and the blades is an air inlet, and the other side is an air outlet; an air flow channel is formed between the air inlet and any air outlet;

[0006] Among them, the blade has a disc line and a wheel cover line, and the disc line and the wheel cover line are both set to Bezier curves; and there is an angle θ between the line connecting the end points of the disc line and the wheel cover line close to the air outlet and the impeller axis, and on the plane projection of the blade and the disc perpendicular to the axis, the angle θ makes the blade have a portion that exceeds the outer edge surface of the disc.

[0007] Preferably, the angle θ is set between 20° and 40°.

[0008] Preferably, the angle between the tangent direction of the surface at any position of the blade and the rotation direction of the surface at the same position is the blade inlet angle β, and the inlet angle of the corresponding wheel disc line is set to β1, the inlet angle of the wheel cover line is β2, and the inlet angle of any profile line between the wheel disc line and the wheel cover line is β3; and on any plane perpendicular to the wheel disc axis, β1>β3>β2 is satisfied.

[0009] Preferably, the β1 is set between 35° and 65°; and the β2 is set between 20° and 30°.

[0010] Preferably, in a cross section perpendicular to the air flow direction, the cross-sectional area of ​​the air inlet is larger than the cross-sectional area of ​​the air outlet.

[0011] Preferably, the blades and the wheel disc are made by an integrated molding process, and the blades are arranged in nine pieces and are made of aluminum alloy.

[0012] Compared with the prior art, the advantages of the utility model are:

[0013] (1) In the present application, the blades and the wheel disc of the impeller are made in an integrated manner. Compared with the traditional plug-in blades, there is no assembly tolerance between the blades, which reduces the dynamic load and enables the impeller to have a higher rotation speed.

[0014] (2) The line connecting the end points of the wheel disc line and the wheel cover line near the air outlet provided in the present application has an angle θ with the axis of the wheel disc. In the projection of the blade and the wheel disc on a plane perpendicular to the axis, the angle θ enables the blade to have a portion extending beyond the outer edge of the wheel disc. The portion of the blade extending beyond the outer edge of the wheel disc can generate more work on the airflow, thereby improving the suction efficiency of the blade.

[0015] (3) The inlet angle of the impeller line is larger than that of the wheel cover line, and the inlet angle decreases linearly from the impeller line to the wheel cover line. This is conducive to the airflow entering the airflow channel more smoothly after the impeller rotates at high speed, thereby reducing the airflow vortex noise. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0017] Figure 1 This is a structural diagram of a vacuum cleaner impeller according to the utility model;

[0018] Figure 2 This is a structural diagram of a vacuum cleaner impeller according to the utility model;

[0019] Figure 3 This is a cross-sectional view of a vacuum cleaner impeller according to the utility model;

[0020] Figure 4 This is a partial enlarged view of a vacuum cleaner impeller according to the utility model;

[0021] Among them: 1. Disc, 2. Blades, 3. Disc line, 4. Wheel cover line. DETAILED DESCRIPTION

[0022] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0023] It should be noted that when a component is referred to as being "fixed on" or "disposed on" another component, it may be directly or indirectly located on the other component. When a component is referred to as being "connected to" another component, it may be directly or indirectly connected to the other component. The directions or positions indicated by the terms "upper", "lower", "left", "right", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. are based on the directions or positions shown in the accompanying drawings and are only for the convenience of description and cannot be understood as limitations on the present technical solution. The terms "first" and "second" are only used for the convenience of description and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features. "Multiple" means two or more, unless otherwise clearly and specifically defined.

[0024] like Figure 1 and Figure 2 As shown, a vacuum cleaner impeller includes a wheel disc 1. Blades 2 are integrally formed on the wheel disc 1, and the blades 2 and the wheel disc 1 are both made of aluminum alloy material, and the blades 2 are arranged in a spiral shape around the axis of the wheel disc 1 and are arranged in nine numbers. The external motor hood (which can be used as a wheel cover) covers the wheel disc 1 and fits with the blades 2, and then nine closed areas are formed between the wheel disc 1 and the inner wall of the motor hood through the separation of multiple blades 2, and the closed area is constructed as an air flow channel, and the end of the air flow channel away from the air inlet is set as an air outlet. In the cross section perpendicular to the flow direction of the air flow, the air inlet has a cross-sectional area larger than that of the air outlet, so that the incoming air flow flows out at a high speed. Because the blades 2 and the wheel disc 1 are made by an integral molding process, compared with plug-in blades, there is no assembly tolerance between the blades 2, which reduces the dynamic load and enables the impeller to have a higher rotation speed.

[0025] Among them, Figure 3 As shown, the blade 2 has a hub line 3 (hub) and a shroud line 4 (shroud), and both the hub line 3 and the shroud line 4 are set as Bezier curves. The blade 2 constructed by the Bezier curve can make the airflow flow more smoothly in the airflow channel and avoid sudden changes in airflow pressure.

[0026] like Figure 3 As shown, the line connecting the end points of the wheel line 3 and the wheel cover line 4 near the air outlet has an angle θ with the axis of the wheel disc 1. On the plane projection of the blade 2 and the wheel disc 1 perpendicular to the axis, the angle θ enables the blade 2 to have a portion extending beyond the outer edge of the wheel disc 1. The portion of the blade 2 extending beyond the outer edge of the wheel disc 1 can produce more work on the airflow, thereby improving the efficiency of the blade 2. In this embodiment, the angle θ is preferably between 20° and 40°.

[0027] like Figure 4As shown, the angle between the tangent direction ω of the surface of the blade 2 at any position and the rotation direction μ of the surface at the same position is the inlet angle β of the blade 2, and the inlet angle of the corresponding wheel line 3 is set to β1, the inlet angle of the wheel cover line 4 is set to β2, and the inlet angle of any profile line between the wheel line 3 and the wheel cover line 4 is set to β3. On any plane perpendicular to the axis of the wheel 1, the inlet angle from the wheel line 3 to the wheel cover line 4 decreases linearly, that is, β1>β3>β2. This setting is conducive to the airflow entering the airflow channel more smoothly after the impeller rotates at high speed, thereby reducing the airflow vortex noise.

[0028] In this embodiment, the angle of β1 is preferably between 36° and 64°, and the angle of β2 is preferably between 22° and 30°.

[0029] The above embodiments are only for illustrating the technical concept and features of the utility model, and their purpose is to enable people familiar with this technology to understand the content of the utility model and implement it accordingly, and they cannot be used to limit the protection scope of the utility model. For those skilled in the art, it is obvious that the utility model is not limited to the details of the above exemplary embodiments, and the utility model can be implemented in other specific forms without departing from the spirit or basic features of the utility model. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the utility model is limited by the attached claims rather than the above description, so it is intended to include all changes within the meaning and scope of the equivalent elements of the claims in the utility model.

Claims

1. A vacuum cleaner impeller, characterized in that: It comprises a wheel disc, on which blades are arranged, wherein the blades are arranged in a plurality and are arranged in a spiral shape around the axis of the wheel disc; one side of the wheel disc and the blades is an air inlet, and the other side is an air outlet; an air flow channel is formed between the air inlet and any air outlet; Among them, the blade has a disc line and a wheel cover line, and the disc line and the wheel cover line are both set to Bezier curves; and there is an angle θ between the line connecting the end points of the disc line and the wheel cover line close to the air outlet and the impeller axis, and on the plane projection of the blade and the disc perpendicular to the axis, the angle θ makes the blade have a portion that exceeds the outer edge surface of the disc.

2. A vacuum cleaner impeller according to claim 1, characterized in that: The angle θ is set between 20° and 40°.

3. A vacuum cleaner impeller according to claim 2, characterized in that: The angle between the tangent direction of the surface of the blade at any position and the rotation direction of the surface at the same position is the blade inlet angle β, and the inlet angle of the corresponding wheel disc line is set to β1, the inlet angle of the wheel cover line is β2, and the inlet angle of any profile line between the wheel disc line and the wheel cover line is β3; and on any plane perpendicular to the wheel disc axis, β1>β3>β2 is satisfied.

4. A vacuum cleaner impeller according to claim 3, characterized in that: The β1 is set between 35° and 65°; the β2 is set between 20° and 30°.

5. A vacuum cleaner impeller according to claim 1, characterized in that: In a cross section perpendicular to the air flow direction, the cross-sectional area of ​​the air inlet is larger than the cross-sectional area of ​​the air outlet.

6. A vacuum cleaner impeller according to claim 1, characterized in that: The blades and the wheel disc are made by an integrated molding process, and the blades are arranged in nine pieces and are made of aluminum alloy.

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