Detachable impeller structure suitable for centrifugal fan

Abstract

The detachable impeller structure comprises an impeller base plate, a mounting hole is formed in the middle of the impeller base plate, and a plurality of blades are evenly distributed on the portion, on the outer side of the mounting hole, of the impeller base plate in the circumferential direction. Embedded blocks protruding downwards are arranged at the bottoms of the inner sides of the blades, and the embedded blocks are embedded into the embedded grooves in the lower portions from top to bottom; the inner side and the outer side of the clamping block are embedded into the inner clamping groove and the outer clamping groove from top to bottom and then locked. According to the utility model, the plurality of blades are detachably mounted on the impeller chassis, so that the blades can be independently dismounted, the flexibility of the blades on the impeller chassis is improved, and the requirements of different application scenes are met.

Description

Technical Field

[0001] This utility model relates to the technical field of centrifugal fans, and in particular to a detachable impeller structure suitable for centrifugal fans. Background Technology

[0002] The function of a centrifugal fan is generally to provide power for the air circulation of its connected components. During normal operation, the impeller is driven by a motor to rotate within the volute. Air enters through the inlet chamber from the center of the impeller. Due to the centrifugal force of the rotating blades, the gas gains energy, rapidly increasing its pressure and velocity. Under the action of centrifugal force, the gas is thrown along the impeller passage towards the casing and discharged from the outlet of the volute. The centrifugal fan achieves the increase in gas pressure and the discharge of gas by relying on the input mechanical energy.

[0003] A search revealed Chinese Patent Publication No. CN219119506U, Reference Document 1, which discloses a centrifugal fan impeller, a centrifugal fan, and a ventilation therapy device. The centrifugal fan impeller includes an impeller base and multiple main blades evenly distributed on the impeller base. Each main blade is perpendicular to the impeller base and forms a backward-curved impeller. The upper edge of each main blade away from the impeller base includes a straight section extending parallel to or inclined away from the impeller base in a direction from the inner edge outwards, and an umbrella-shaped section extending inclined towards the impeller base in a direction from the straight section outwards. This centrifugal fan impeller is easy to manufacture at low cost using draft molding technology and effectively increases the work capacity of the backward-curved impeller centrifugal fan.

[0004] Or like Figure 1 Reference document 2 shows that there is a mounting hole in the middle of the impeller chassis. Several blades are evenly distributed along the circumference on the impeller chassis outside the mounting hole. The blades are welded or fixed to the impeller chassis by other means or integrally formed on the impeller chassis, which makes the blades less flexible and not suitable for the needs of different application scenarios.

[0005] In view of the above-mentioned shortcomings, the designer actively researched and innovated in order to create a detachable impeller structure suitable for centrifugal fans, making it more industrially valuable. Utility Model Content

[0006] To solve the above-mentioned technical problems, the purpose of this utility model is to provide a detachable impeller structure suitable for centrifugal fans.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A detachable impeller structure suitable for centrifugal fans includes an impeller chassis, a mounting hole in the middle of the impeller chassis, and a number of blades evenly distributed along the circumference on the impeller chassis outside the mounting hole.

[0009] A downward-protruding insert is provided on the inner bottom of the blade, and a downward-recessed groove is provided on the impeller base to match the insert. The insert is inserted into the groove from top to bottom.

[0010] An outer groove facing downwards is provided on the top of the insert, and an inner groove facing downwards is provided on the impeller base inside the outer groove. The inner and outer sides of the insert are respectively inserted into the inner groove and the outer groove from top to bottom and then locked.

[0011] As a further improvement of this utility model, the card block is locked in the outer card slot and the inner card slot by a number of first locking members.

[0012] As a further improvement of this utility model, the blades near the outer side of the insert are tightly attached to the impeller chassis.

[0013] As a further improvement of this utility model, the blades near the outer side of the insert are tightly attached to the impeller chassis and then locked by several second locking elements.

[0014] As a further improvement of this utility model, the blades are connected together in pairs by support members, and both sides of the support members are locked by third locking members.

[0015] As a further improvement of this utility model, the outer side of the blade extends to the outer side of the impeller chassis.

[0016] By means of the above solution, this utility model has at least the following advantages:

[0017] The blades of this invention can be detachably mounted on the impeller chassis, allowing for individual blade disassembly and improving the flexibility of the blades on the impeller chassis to meet the needs of different application scenarios.

[0018] The blades of this invention are easy to install and remove from the impeller chassis, and the operation is convenient.

[0019] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the following are the preferred embodiments of this utility model and are described in detail with reference to the accompanying drawings. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a structural schematic diagram of prior art reference document 2;

[0022] Figure 2 This is a schematic diagram of the structure of the first embodiment of the present utility model;

[0023] Figure 3 This is a schematic diagram of the structure of the second embodiment of the present utility model;

[0024] Figure 4 This is a structural schematic diagram of the third embodiment of the present invention.

[0025] The meanings of the labels in the figures are as follows.

[0026] Impeller base 1, blade 2, mounting hole 3, groove 4, insert 5, outer groove 6, inner groove 7, locking block 8, first locking component 9, second locking component 10, support component 11, third locking component 12. Detailed Implementation

[0027] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0028] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0029] Example

[0030] like Figure 1As shown, a mounting hole 3 is provided in the middle of the impeller base 1. Several blades 2 are evenly distributed along the circumference on the impeller base 1 outside the mounting hole 3. The blades 2 closest to the outer side of the insert 5 are tightly attached to the impeller base 1, and the outer side of the blades 2 extends to the outer side of the impeller base 1. These blades are either welded or fixed to the impeller base by other means, or integrally formed on the impeller base. This results in poor blade flexibility, making it unsuitable for different application scenarios.

[0031] A first embodiment of this utility model is as follows: Figure 2 As shown:

[0032] A detachable impeller structure suitable for centrifugal fans includes an impeller base 1. A mounting hole 3 is provided in the center of the impeller base 1. A plurality of blades 2 are evenly distributed circumferentially on the impeller base 1 outside the mounting hole 3. A downwardly protruding insert 5 is provided on the inner bottom of the blades 2. A downwardly recessed groove 4 is formed on the impeller base 1 to match the insert 5. The insert 5 is fitted into the lower groove 4 from top to bottom.

[0033] A downward-facing outer groove 6 is formed on the top of the insert 5, and a downward-facing inner groove 7 is formed on the impeller base 1 inside the outer groove 6. The inner and outer sides of the locking block 8 are respectively inserted into the inner groove 7 and the outer groove 6 from top to bottom and then locked. The locking block 8 is locked in the outer groove 6 and the inner groove 7 by a number of first locking elements 9.

[0034] During installation, the insert 5 on the inner bottom of the blade 2 is inserted into the groove 4 below from top to bottom. Then, the locking block 8 is inserted into the inner groove 7 and the outer groove 6 from top to bottom respectively. Finally, the locking block 8 is locked in the outer groove 6 and the inner groove 7.

[0035] A second embodiment of this utility model is, for example... Figure 3 As shown:

[0036] Based on the first embodiment described above, the blade 2 near the outer side of the insert 5 is tightly attached to the impeller base 1 and then locked in place by several second locking members 10. This further secures the contact area between the blade 2 and the impeller base 1.

[0037] The third embodiment of this utility model is as follows: Figure 4 As shown:

[0038] Based on the second embodiment described above, the blades 2 are connected in pairs by support members 11, and both sides of the support members 11 are locked by third locking members 12. The support members 11 reinforce the outer sides of the blades 2 between each pair.

[0039] The aforementioned locking components are bolt-locking or other locking structures, and the aforementioned support component 11 is an arc-shaped connecting ring or a connecting rope or other connecting structure.

[0040] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0041] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0042] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A detachable impeller structure suitable for centrifugal fan, comprising an impeller base (1), a mounting hole (3) is arranged in the middle of the impeller base (1), a plurality of blades (2) are evenly distributed along the circumferential direction on the outer side of the mounting hole (3) of the impeller base (1); Characterized in that: A protruding block (5) is arranged on the inner side bottom of the blade (2) and protrudes downward, a recessed groove (4) is arranged on the impeller base (1) and is matched with the block (5) and recessed downward, the block (5) is embedded into the recessed groove (4) from top to bottom; An outer clamping groove (6) is arranged on the top of the block (5) and recessed downward, an inner clamping groove (7) is arranged on the inner side of the outer clamping groove (6) and recessed downward, the inner and outer sides of the clamping block (8) are embedded into the inner and outer clamping grooves (7) and (6) from top to bottom and then locked.

2. A detachable impeller structure for a centrifugal fan according to claim 1, wherein The clamping block (8) is locked in the outer and inner clamping grooves (6) and (7) by a plurality of first locking members (9).

3. A detachable impeller structure for a centrifugal fan according to claim 1, wherein The blade (2) close to the outer side of the block (5) is tightly attached to the impeller base (1).

4. A demountable impeller structure for a centrifugal fan as claimed in claim 3, wherein The blade (2) close to the outer side of the block (5) is tightly attached to the impeller base (1) and then locked by a plurality of second locking members (10).

5. A detachable impeller structure for a centrifugal fan according to claim 1, wherein The blades (2) are connected together by a support member (11), and the two sides of the support member (11) are locked by third locking members (12).

6. A detachable impeller structure for a centrifugal fan according to claim 1, wherein The outer side of the blade (2) extends to the outer side of the impeller base (1).

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