Annular impeller structure of centrifugal fan

Abstract

The utility model relates to an annular impeller structure of a centrifugal fan. A plurality of blades are evenly distributed between a front cover plate and a rear cover plate in the circumferential direction. A front inserting hole used for installing the front inserting column is formed in the front cover plate at the front end of the front inserting column, a rear inserting hole used for installing the rear inserting column is formed in the rear cover plate at the rear end of the rear inserting column, a limiting block at the front end of the front inserting column is located at the front end of the front cover plate, and a nut is installed on the inserting column at the rear end of the rear cover plate. According to the utility model, the plurality of blades are detachably arranged between the front cover plate and the rear cover plate, so that the blades can be independently disassembled, and the use and maintenance cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to centrifugal fan related technical field especially, it relates to a centrifugal fan annular impeller structure. BACKGROUND

[0002] The centrifugal fan is generally used for air circulation of the assembly connected with it. When the centrifugal fan is running normally, the impeller is driven by the motor to rotate in the volute, and the air enters the center of the impeller from the air inlet chamber. The centrifugal force of the rotating blade makes the gas gain energy, and the gas pressure and speed are rapidly increased. Under the action of the centrifugal force, the gas is thrown to the casing along the blade channel, and is discharged from the volute outlet. The centrifugal fan relies on the input mechanical energy to realize the increase of the gas pressure and the discharge of the gas.

[0003] After searching, reference file 1 with Chinese patent publication number CN216554580U is found, which discloses a centrifugal fan impeller assembly and a centrifugal fan using the same, comprising: a center disc having ventilation holes arranged along the circumference; each ventilation hole has a wave-shaped edge as a noise reduction part. The wave-shaped edge is provided on each ventilation hole of the center disc. The wave-shaped edge can improve the aerodynamic noise generated by the airflow passing through it by forming a phase difference, avoiding the problem of unsteady airflow pulsation caused by the straight edge cutting the airflow during the rotation of the impeller in the prior art.

[0004] Or as shown in reference file 2, the impeller assembly includes a front cover plate and a rear cover plate, and a plurality of blades are uniformly distributed between the front cover plate and the rear cover plate along the circumferential direction. The plurality of blades are welded or fixedly installed between the front and rear cover plates by other means. Such fixed installation structure is more troublesome and has high use and maintenance cost if a single blade is damaged during use and the entire impeller needs to be replaced. Figure 1

[0005] In view of the above-mentioned defects, the designer actively researches and innovates to create a centrifugal fan annular impeller structure, so that it has more industrial utilization value. CONTENT OF THE UTILITY MODEL

[0006] To solve the above technical problems, the purpose of the utility model is to provide a centrifugal fan annular impeller structure.

[0007] To achieve the above purpose, the utility model adopts the following technical solutions:

[0008] A centrifugal fan annular impeller structure, comprising an impeller assembly, the impeller assembly comprising a front cover plate and a rear cover plate, and a plurality of blades being uniformly distributed between the front cover plate and the rear cover plate along the circumferential direction;

[0009] ​The front inserting column is arranged at the front end of the blade, the rear inserting column is arranged at the rear end of the blade, the front cover plate is provided with a front inserting hole for mounting the front inserting column, the rear cover plate is provided with a rear inserting hole for mounting the rear inserting column, the limiting block at the front end of the front inserting column is located at the front end of the front cover plate, and the nut is arranged on the rear inserting column at the rear end of the rear cover plate.

[0010] As a further improvement of the utility model, a plurality of reinforcing ribs are arranged between the blade and the front inserting column and the rear inserting column.

[0011] As a further improvement of the utility model, a locking inner hole is arranged on the rear inserting column, a locking outer hole is arranged on the rear cover plate at the outer side of the rear inserting column, and the locking rod is arranged in the locking outer hole and the locking inner hole from the outside to the inside.

[0012] As a further improvement of the utility model, the locking rod is inserted into the locking outer hole and then is arranged in the locking inner hole through the thread.

[0013] As a further improvement of the utility model, the locking rod is inserted into the locking inner hole after being arranged in the locking outer hole through the thread.

[0014] As a further improvement of the utility model, a front clamping groove is arranged on the front end of the front cover plate for accommodating the limiting block.

[0015] As a further improvement of the utility model, a rear clamping groove is arranged on the rear end of the rear cover plate for accommodating the nut.

[0016] By the above scheme, the utility model has at least the following advantages:

[0017] The plurality of blades of the utility model can be detachably arranged between the front cover plate and the rear cover plate, the blade can be individually disassembled and handled, and the use and maintenance costs are reduced.

[0018] The blade of the utility model is simple in mounting and dismounting on the front cover plate and the rear cover plate, and is convenient to operate.

[0019] The above description is only a summary of the technical scheme of the utility model, in order to more clearly understand the technical means of the utility model, and the utility model can be implemented according to the content of the specification, and the following is a preferred embodiment of the utility model and is described in detail with reference to the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly introduced as follows. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope. Other related drawings can also be obtained by those skilled in the art without creative labor on the premise of the drawings.

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

[0022] Figure 2 is a structural schematic diagram of a centrifugal fan annular impeller structure of the present application;

[0023] Figure 3 is Figure 1 a structural schematic diagram of the inside of the

[0024] In the drawings, the meanings of various reference signs are as follows.

[0025] Impeller assembly 1, front cover plate 2, blade 3, rear cover plate 4, limiting block 5, front plug-in column 6, nut 7, rear plug-in column 8, reinforcing rib plate 9, locking hole 10, locking rod 11, front clamping groove 12, front insertion hole 13, rear clamping groove 14, rear insertion hole 15. DETAILED DESCRIPTION

[0026] The specific embodiments of the present application will be further described in detail below in combination with the drawings and examples. The following examples are used to illustrate the present application, but are not used to limit the scope of the present application.

[0027] In order to enable those skilled in the art to better understand the present application, the technical scheme in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. The components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of the present application.

[0028] EMBODIMENT

[0029] As Figure 1As shown, the impeller assembly 1 of reference file 2 comprises a front cover plate 2 and a rear cover plate 4, and a plurality of blades 3 are uniformly distributed between the front cover plate 2 and the rear cover plate 4 along the circumferential direction. The plurality of blades are welded or fixedly installed between the front and rear cover plates by other means. Such a fixed installation structure is relatively troublesome and has high use and maintenance costs if the entire impeller needs to be replaced when a single blade is damaged during use.

[0030] As shown, Figures 2-3

[0031] The utility model discloses a centrifugal fan annular impeller structure, including impeller assembly 1, impeller assembly 1 includes front cover plate 2 and rear cover plate 4, and a plurality of blades 3 are uniformly distributed between front cover plate 2 and rear cover plate 4 along the circumferential direction. The front end of blade 3 is provided with front plug-in column 6, and the rear end of blade 3 is provided with rear plug-in column 8. A front insertion hole 13 for installing front plug-in column 6 is formed in the front cover plate 2 at the front end of the front plug-in column 6. A rear insertion hole 15 for installing rear plug-in column 8 is formed in the rear cover plate 4 at the rear end of the rear plug-in column 8. The limiting block 5 at the front end of the front plug-in column 6 is located at the front end of the front cover plate 2. The nut 7 is installed on the plug-in column 8 at the rear end of the rear cover plate 4.

[0032] A front clamping groove 12 for accommodating the limiting block 5 is formed at the front end of the front cover plate 2. A rear clamping groove 14 for accommodating the nut 7 is formed at the rear end of the rear cover plate 4.

[0033] A locking inner hole is formed in the rear plug-in column 8. A locking outer hole 10 that is adapted to the locking inner hole is formed in the rear cover plate 4 outside the rear plug-in column 8. The locking rod 11 is installed in the locking outer hole 10 and the locking inner hole from outside to inside.

[0034] The locking rod 11 has two installation modes:

[0035] 1) The locking rod 11 is inserted into the locking outer hole 10 and then installed in the locking inner hole by screwing.

[0036] 2) The locking rod 11 is installed in the locking outer hole 10 by screwing and then inserted into the locking inner hole on the inside.

[0037] A plurality of reinforcing rib plates 9 are arranged between the blades 3 and the front plug-in column 6 and the rear plug-in column 8. The structural strength of the blades 3 can be improved by the plurality of reinforcing rib plates 9.

[0038] The working principle of the utility model is briefly described as follows:

[0039] ​When installing the blade 3, the rear insertion column 8, the blade 3 and the front insertion column 6 pass through the front insertion hole 13 and the rear insertion hole 15 in sequence, the limiting block 5 at the front end of the front insertion column 6 is clamped in the front clamping groove 12 at the front end of the front cover plate 2, the rear insertion column 8 protrudes from the rear end of the rear insertion hole 15 and is locked by the nut 7, at this time, the blade 3 in the middle is located between the front and rear cover plates. In addition, further reinforcement can be carried out by inserting the locking rod 11 into the locking outer hole 10 on the rear cover plate 4 and the locking inner hole on the rear insertion column 8.

[0040] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second" and the like are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implying the number of technical features indicated. Therefore, the features limited by "first", "second" and the like can be explicitly or implicitly included one or more features. In the description of the present application, unless otherwise stated, the meaning of "a plurality of" is two or more.

[0041] In the description of the present application, it should be noted that, unless otherwise specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrally connected, it can be mechanically connected, or it can be electrically connected, it can be directly connected, or it can be indirectly connected through an intermediate medium, it can be the communication between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood by specific circumstances.

[0042] The above is only the preferred embodiment of the present application, and is not used to limit the present application, it should be pointed out that, for ordinary skilled in the art, without departing from the technical principles of the present application, a number of improvements and modifications can be made, these improvements and modifications should be regarded as the protection scope of the present application.

Claims

1. A centrifugal fan annular impeller structure, comprising an impeller assembly (1), the impeller assembly (1) comprising a front cover plate (2) and a rear cover plate (4), a plurality of blades (3) being evenly distributed between the front cover plate (2) and the rear cover plate (4) along a circumferential direction; characterized in that: a front plug-in post (6) is arranged at a front end of the blade (3), a rear plug-in post (8) is arranged at a rear end of the blade (3), a front plug hole (13) for mounting the front plug-in post (6) is formed in the front cover plate (2) at a front end of the front plug-in post (6), a rear plug hole (15) for mounting the rear plug-in post (8) is formed in the rear cover plate (4) at a rear end of the rear plug-in post (8), a limiting block (5) at a front end of the front plug-in post (6) is located at a front end of the front cover plate (2), and a nut (7) is mounted on the rear plug-in post (8) at a rear end of the rear cover plate (4). A plurality of reinforcing ribs (9) are arranged between the blade (3) and the front plug-in post (6) and the rear plug-in post (8). A locking inner hole is formed in the rear plug-in post (8), a locking outer hole (10) adapted to the locking inner hole is formed in the rear cover plate (4) outside the rear plug-in post (8), and a locking rod (11) is mounted in the locking outer hole (10) and the locking inner hole from outside to inside.

2. A centrifugal fan ring impeller structure as claimed in claim 1, wherein The locking rod (11) is inserted into the locking outer hole (10) and then mounted in the locking inner hole by screwing.

3. A centrifugal fan ring impeller structure as claimed in claim 1, wherein The locking rod (11) is mounted in the locking outer hole (10) by screwing and then inserted into the locking inner hole inside.

4. A centrifugal fan ring impeller structure as claimed in claim 3, wherein A front clamping groove (12) for accommodating the limiting block (5) is formed at a front end of the front cover plate (2).

5. A centrifugal fan ring impeller structure as claimed in claim 3, wherein A rear clamping groove (14) for accommodating the nut (7) is formed at a rear end of the rear cover plate (4).

6. A centrifugal fan ring impeller structure as claimed in claim 1, wherein ​ 7. A centrifugal fan ring impeller structure as claimed in claim 1, wherein ​

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