Wavy coil fan blade

Abstract

The utility model relates to the field of fans, in particular to a wave-shaped coil fan blade which comprises a middle disc, blade sets arranged along the outer edges of the two end faces of the middle disc in the circumferential direction and air rings connected to the outer side edges of the blade sets. An air cavity is formed between the middle disc and the blade sets on the two sides of the middle disc, an enclosed area in the air ring forms the air inlet, and an air outlet is formed between every two adjacent blades in the blade sets. At least the circumferential edge of the middle disc is constructed to be in a wave shape regularly fluctuating in the axial direction, and the roots of the blade sets on the two sides are connected to the wave-shaped circumferential edge of the middle disc. According to the scheme, the circumferential edge of the middle disc is made into the wave shape, the overall strength of the edge of the middle disc is improved, the anti-falling height of the wind wheel is increased, and the limit rotating speed of the wind wheel is increased.

Description

Technical Field

[0001] The utility model relates to the field of fans, in particular to a wave-shaped coil fan blade. Background Art

[0002] Coil fan blades can also be called double-inlet centrifugal fan blades, which are widely used in equipment such as air conditioners and vehicles, or in factories, mines and other occasions. The existing double-inlet centrifugal fan blades are mainly composed of a middle disk, a sleeve with an axial hole, an upper blade group, a lower blade group and two wind circles. The upper blade group and the lower blade group are regularly arranged along the edges of the two sides of the middle disk, and a wind circle is provided on the ends of the outer sides of the upper blade group and the lower blade group, respectively. The sleeve with an axial hole through which the motor shaft passes is set at the center of the middle disk. For details, please refer to the prior patent solutions recorded in announcement numbers CN202326404U, CN201420710Y, and CN217129902U.

[0003] In the above-mentioned existing coil fan blades, the middle plate of the coil fan blade is a circular plate, and the strength of the middle plate is insufficient, which needs to be improved. Summary of the invention

[0004] In order to solve the above problems, the purpose of the utility model is to provide a wave-shaped coil fan blade. The circumferential edge of the middle disk is made into a wave shape, which is beneficial to improving the overall strength of the edge of the middle disk, not only improving the anti-fall height of the wind wheel, but also improving the maximum rotation speed of the wind wheel.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical solutions:

[0006] A wave-shaped coil fan blade comprises a middle disk, a blade group arranged circumferentially along the outer edges of the two end surfaces of the middle disk, and a wind ring connected to the outer edges of the blade group; a wind cavity is formed between the middle disk and the blade groups on both sides thereof, the enclosed area inside the wind ring constitutes the air inlet, and an air outlet is formed between two adjacent blades in the blade group; it is characterized in that at least the circumferential edge of the middle disk is constructed as a wave shape that regularly undulates along the axial direction, and the roots of the blade groups on both sides are connected to the wave-shaped circumferential edge of the middle disk.

[0007] The utility model adopts the above-mentioned technical solution, which relates to a wave-shaped coil fan blade. When the wave-shaped coil fan blade is in operation, the airflow is introduced into the wind cavity from the air inlet in the wind circle, and then the airflow is thrown out from the air outlet based on the centrifugal force. On this basis, at least the circumferential edge of the middle disk in this solution is constructed into a wave shape that regularly undulates along the axial direction, and the roots of the blade groups on both sides are connected to the wave-shaped circumferential edge of the middle disk. The solution here makes the circumferential edge of the middle disk into a wave shape, which is conducive to improving the overall strength of the edge of the middle disk, not only improving the anti-fall height of the wind wheel, but also improving the maximum speed of the wind wheel.

[0008] In a specific embodiment, the thickness of the middle plate is h, and the height of the single-side wave is L, L≤2h. Here, the scheme requires that the height of the wave-shaped undulation does not exceed twice the thickness of the middle plate h.

[0009] Preferably, the middle disk is divided into a central area and an edge area along its radial direction, and the wave-shaped undulation is only constructed in the edge area of ​​the middle disk.

[0010] Preferably, the height of the wavy undulations gradually decreases from the outer side to the center of the middle disk, and the height of the innermost side of the wavy undulations to the edge area is 0. In this scheme, the height of the wavy undulations is made into a gradual shape, and the height gradually decreases from the radial outer side to the inner side until it is 0. The wavy undulations on the middle disk have a transition and no obvious change. In this way, during the centrifugal air discharge process of the coil fan blades, there will be no large wind resistance when the airflow passes through the surface of the middle disk.

[0011] In a specific implementation scheme, the outer diameter of the middle disk is D, and the outer diameter of the central area is d; the wave length = (Dd) / 2, d≤D / 2.

[0012] Preferably, a shaft sleeve for connecting to the motor shaft is arranged at the center of the middle disk, and the shaft sleeve is used for plugging the motor shaft.

[0013] In a specific implementation, a connection hole is constructed on the side wall of the sleeve, and a clearance is provided at the lower end of the blade assembly at a position radially corresponding to the connection hole; the clearance is formed in an arched plate on the wavy circumferential edge. In this solution, when the motor shaft is plugged into the sleeve, it needs to be tightened by bolts, and a clearance is formed in the arched plate on the wavy circumferential edge for the bolts to align with the connection hole for installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a three-dimensional image of a wavy coil fan blade.

[0015] Figure 2 This is a side view of the corrugated coil fan blade.

[0016] Figure 3 This is an end view of the corrugated coil fan blade.

[0017] Figure 4 This is a side view of the wavy coil fan blade from another angle. DETAILED DESCRIPTION

[0018] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0019] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0020] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "plurality" means two or more, unless otherwise clearly defined.

[0021] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0022] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0023] like Figures 1 to 4As shown, the present embodiment relates to a wave-shaped coil fan blade, comprising a middle disk 1, and blade groups 2 arranged circumferentially along the outer edges of the two end surfaces of the middle disk 1, and a wind circle 3 connected to the outer edges of the blade group 2. A wind cavity is formed between the middle disk 1 and the blade groups 2 on both sides thereof, the enclosed area inside the wind circle 3 constitutes the air inlet 31, and an air outlet 21 is formed between two adjacent blades in the blade group 2. A sleeve 5 for connecting the motor shaft is provided at the center of the middle disk 1, and the sleeve 5 is used to plug in the motor shaft. In a specific implementation scheme, a connecting hole 51 is constructed on the side wall of the sleeve 5, and a avoidance opening 22 is provided at the lower end of the blade group 2 at a position radially corresponding to the connecting hole 51.

[0024] At least the circumferential edge of the middle disk 1 is constructed as a wave shape that regularly undulates along the axial direction, and the roots of the blade groups 2 on both sides are connected to the wavy circumferential edge of the middle disk 1. When the wavy coil fan blade is in operation, the airflow is introduced into the wind cavity from the air inlet 31 in the wind circle 3, and then the airflow is thrown out from the air outlet based on the centrifugal force. On this basis, at least the circumferential edge of the middle disk 1 in this scheme is constructed as a wave shape that regularly undulates along the axial direction, and the roots of the blade groups 2 on both sides are connected to the wavy circumferential edge of the middle disk 1. The scheme here makes the circumferential edge of the middle disk 1 into a wave shape, which is conducive to improving the overall strength of the edge of the middle disk 1, not only improving the anti-fall height of the wind wheel, but also improving the maximum speed of the wind wheel.

[0025] In the above solution, the avoidance opening 22 is formed in the arched plate 23 on the wavy circumferential edge. In this solution, when the motor shaft is plugged into the sleeve 5, it needs to be tightened by bolts, and the avoidance opening 22 is formed in the arched plate 23 on the wavy circumferential edge for the bolts to align with the connecting hole 51 for installation.

[0026] like Figure 1 and 3 As shown, the middle plate 1 is divided into a central area 11 and an edge area 12 along its radial direction, and the wave-shaped undulation is only constructed in the edge area 12 of the middle plate 1. It should be noted that Figure 1 The ripples on the edge area 12 in Figure 3 The viewing angle is difficult to be found, so it is omitted. In a specific embodiment, the outer diameter of the middle plate 1 is D, and the outer diameter of the central area 11 is d. The wave length = Dd / 2, d≤D / 2.

[0027] In a specific implementation scheme, the thickness of the middle disk 1 is h, and the height of the single-side wave is L, L≤2h. The scheme here requires that the height of the wave-shaped undulation does not exceed twice the thickness h of the middle disk 1. In a specific scheme, the height of the wave-shaped undulation gradually decreases from the outside to the center of the middle disk 1, and the innermost height of the wave-shaped undulation to the edge area 12 is 0. The scheme here makes the height of the wave-shaped undulation into a gradual shape, and the height gradually decreases from the radial outside to the inside until it is 0. There is a transition in the wave-shaped undulation on the middle disk 1, and there is no obvious change. In this way, during the centrifugal air outlet of the coil fan blades, there will be no large wind resistance when the airflow passes through the surface of the middle disk 1.

[0028] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0029] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are illustrative and cannot be understood as limitations on the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention without departing from the principles and purpose of the present invention.

Claims

1. A corrugated coil fan blade, comprising a center disk (1), a blade group (2) arranged circumferentially along the outer edges of both end surfaces of the center disk (1), and a wind ring (3) connected to the outer edges of the blade group (2); a wind cavity is formed between the center disk (1) and the blade groups (2) on both sides thereof, an internal enclosed area of ​​the wind ring (3) constitutes an air inlet (31), and an air outlet (21) is formed between two adjacent blades in the blade group (2); the characteristics are: At least the circumferential edge of the center disk (1) is constructed in a wave shape that regularly undulates along the axial direction, and the roots of the blade groups (2) on both sides are connected to the wavy circumferential edge of the center disk (1).

2. The corrugated coil fan blade according to claim 1, characterized in that: The middle plate (1) has a thickness of h and a single-side wave height of L, where L≤2h.

3. The corrugated coil fan blade according to claim 1, characterized in that: The middle disk (1) is divided into a central area (11) and an edge area (12) along its radial direction, and the wave-shaped undulation is only constructed in the edge area (12) of the middle disk (1).

4. The corrugated coil fan blade according to claim 3, characterized in that: The height of the wave-like undulations gradually decreases from the outer side to the center of the middle plate (1), and the innermost height of the wave-like undulations at the edge area (12) is 0.

5. The corrugated coil fan blade according to claim 4, characterized in that: The outer diameter of the middle plate (1) is D, and the outer diameter of the central area (11) is d; the wave length = (Dd) / 2, d≤D / 2.

6. The corrugated coil fan blade according to claim 1, characterized in that: A shaft sleeve (5) for connecting to a motor shaft is arranged at the center of the middle disc (1).

7. The corrugated coil fan blade according to claim 6, characterized in that: A connecting hole (51) is formed on the side wall of the shaft sleeve (5), and a relief opening (22) is provided at the lower end of the blade assembly (2) radially corresponding to the connecting hole (51); the relief opening (22) is formed in an arched plate (23) located on the wavy circumferential edge.

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