Outer rotor centrifugal fan shell assembly

Abstract

The utility model relates to the technical field of centrifugal fan casing components, in particular to an outer rotor centrifugal fan casing component, which comprises a casing and a fixed end cover rotatably mounted on the casing, an outer rotor component is fixedly mounted on the casing, a stator component is fixedly connected onto the fixed end cover, and the outer rotor component is fixedly connected onto the stator component. The outer rotor assembly and the stator assembly are oppositely arranged, a first flange is arranged on the fixed end cover, a second flange is arranged on the machine shell, the first flange and the second flange are oppositely arranged, and a heat dissipation impeller is fixedly connected to the second flange. The first flange and the second flange are sealed through a labyrinth, the labyrinth sealing structure is simple in structure, convenient to manufacture and maintain, high in pollution resistance, good in sealing effect, wide in applicability and low in energy consumption, the overall heat dissipation performance is improved by being matched with a heat dissipation impeller, the labyrinth sealing structure is suitable for the high-power centrifugal fan, and the applicability of the centrifugal fan is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to centrifugal fan casing assembly technical field especially is related to outer rotor centrifugal fan casing assembly. BACKGROUND

[0002] The main application field of outer rotor centrifugal fan has heating ventilation air conditioning, dust removal and ventilation, medical industry, food industry, commercial place etc., and the working principle of outer rotor centrifugal fan is that matter is sucked through the air inlet, then is accelerated to rotate under the action of rotating impeller and is thrown out the outlet of centrifugal machine under the action of centrifugal force, thereby generating a large amount of airflow and pressure. The existing centrifugal fan mainly includes fixed end cover and outer rotor casing rotatingly arranged on the fixed end cover, and installs centrifugal impeller on the outer rotor casing, and fixes the back cover on the fixed end cover, and part of the heat dissipation fins are installed on the back cover, and the overall heat dissipation efficiency of centrifugal fan is low, therefore, this kind is only applicable to small power centrifugal fan, and for high-power centrifugal fan, heat cannot be dissipated in time, resulting in motor operation failure. SUMMARY

[0003] The utility model provides a kind of outer rotor centrifugal fan casing assembly to solve the problems that the existing centrifugal fan mainly includes fixed end cover and outer rotor casing rotatingly arranged on the fixed end cover, and installs centrifugal impeller on the outer rotor casing, and fixes the back cover on the fixed end cover, and part of the heat dissipation fins are installed on the back cover, and the overall heat dissipation efficiency of centrifugal fan is low, therefore, this kind is only applicable to small power centrifugal fan, and for high-power centrifugal fan, heat cannot be dissipated in time, resulting in motor operation failure.

[0004] The utility model solves the technical scheme that it adopts: a kind of outer rotor centrifugal fan casing assembly, including casing and fixed end cover rotatingly installed on the casing, the casing is fixedly installed with outer rotor assembly, the fixed end cover is fixedly connected with stator assembly, the outer rotor assembly and stator assembly are oppositely arranged, first flange is provided on the fixed end cover, second flange is provided on the casing, the first flange and second flange are oppositely arranged, the second flange is fixedly connected with heat dissipation impeller, the first flange and heat dissipation impeller are provided with labyrinth seal structure, and the heat dissipation impeller is located the periphery of labyrinth seal structure. Compared with prior art, the first flange and second flange are oppositely arranged on the casing and fixed end cover in the present scheme, and the first flange and second flange are sealed by labyrinth, and the labyrinth seal structure is simple in structure, easy to manufacture and maintain, strong in anti-pollution, good in sealing effect, widely applicable, low in energy consumption, and the overall heat dissipation performance is improved by cooperating with heat dissipation impeller, applicable to high-power centrifugal fan, and the applicability of centrifugal fan is increased.

[0005] In order to fix the second flange with the casing and the heat dissipation impeller respectively, preferably some embodiments, the second flange comprises a flange ring matched with the casing, the flange ring is sleeved and fixed on the casing, the flange ring protrudes outwardly along the radial direction of the casing, and the heat dissipation impeller is fixedly installed on the flange.

[0006] In order to realize the specific fixing structure of the second flange and the heat dissipation impeller, preferably some embodiments, the heat dissipation impeller is fixed on the flange by screws.

[0007] In order to realize the sealing labyrinth structure, preferably some embodiments, the heat dissipation impeller comprises an outer ring body, a plurality of first convex rings are arranged on one side of the outer ring body along the radial direction from inside to outside, a plurality of heat dissipation blades are arranged on one side of the outer ring body, the plurality of heat dissipation blades are located outside the plurality of first convex rings, a plurality of second convex rings are arranged on the first flange along the radial direction from inside to outside, the first convex ring and the second convex ring are oppositely arranged, and one of the first convex rings is arranged between two adjacent second convex rings with a gap.

[0008] Preferably, the height of the plurality of first convex rings along the axial direction of the outer ring body gradually decreases from inside to outside.

[0009] In order to realize better sealing effect of the labyrinth seal, preferably some embodiments, the height of the plurality of second convex rings along the axial direction of the fixed end cover gradually decreases from inside to outside.

[0010] In order to realize better sealing effect of the labyrinth seal, preferably some embodiments, the plurality of heat dissipation blades are spaced apart and arranged in the same direction.

[0011] In order to improve the heat dissipation effect of the centrifugal fan, preferably some embodiments, the first flange is provided with heat dissipation fins.

[0012] Preferably, the first flange is provided with a mounting hole connected with the outside.

[0013] In order to improve the connection strength between the fixed end cover and the fixed end cover, preferably some embodiments, the fixed end cover and the fixed end cover are integrally formed.

[0014] The utility model discloses an external rotor centrifugal fan casing assembly has the advantages that when using, through the first flange and the second flange of relative arrangement on the casing and fixed end cover, between the first flange and the second flange passes through the labyrinth seal, and the labyrinth seal structure is simple in structure, is convenient for manufacturing and maintaining, and the anti -pollution is strong, and the sealing effect is good, and the applicability is extensive, and the energy consumption is low, and cooperate with the heat dissipation impeller and improve the overall heat dissipation performance, are applicable to high -power centrifugal fan, increase the applicability of centrifugal fan, avoid the existing centrifugal fan mainly including fixed end cover and the external rotor casing of rotation setting on fixed end cover, and install centrifugal impeller on the external rotor casing, and the rear cover is fixed on the fixed end cover, and part heat dissipation fin is installed on the rear cover, and the overall heat dissipation efficiency of centrifugal fan is low, therefore, this kind is only applicable to small -power centrifugal fan, and for high -power centrifugal fan, heat can not be promptly dissipated, leading to the motor operation failure problem. BRIEF DESCRIPTION OF DRAWINGS

[0015] The utility model is further explained below in combination with the drawings and examples.

[0016] Figure 1 It is the three-dimensional structure schematic diagram of the utility model;

[0017] Figure 2 It is the front view of the utility model;

[0018] Figure 3 It is the plan view of the utility model;

[0019] Figure 4 It is Figure 2 the sectional view of A-A in it;

[0020] Figure 5 It is Figure 4 the partial close -up view of B;

[0021] Figure 6 It is the three-dimensional structure schematic diagram of the heat dissipation impeller in the utility model;

[0022] Figure 7 It is the front view of the heat dissipation impeller in the utility model;

[0023] Figure 8 It is the plan view of the heat dissipation impeller in the utility model;

[0024] Figure 9 It is Figure 6 the partial close -up view of C;

[0025] Figure 10 It is the three-dimensional structure schematic diagram of the fixed end cover in the utility model;

[0026] Figure 11 It is Figure 10 the partial close -up view of D.

[0027] In the figure: 1, the shell, 2, fixed end cover, 3, outer rotor assembly, 4, stator assembly, 5, the first flange, 501, the second convex ring, 6, the second flange, 7, the heat dissipation impeller, 701, the outer ring body, 702, the first convex ring, 703, the heat dissipation blade, 8, the heat dissipation fin, 9, the mounting hole. DETAILED DESCRIPTION

[0028] The utility model make further detailed below with the embodiment:

[0029] The utility model is not limited to the following specific implementation, the person skilled in the art can adopt other various specific implementation to implement the utility model according to the utility model disclosed content, or all falls into the protection scope of the utility model with the design structure and the thought of the utility model, simple change or change, need to be explained, in the case where there is no conflict, the embodiment in the utility model and the feature in the embodiment can be combined mutually.

[0030] In the description of the utility model, it is understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "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 utility model and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model. 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 implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" and the like can explicitly or implicitly include one or more features. In the description of the utility model, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0031] In the description of the utility model, it is understood 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 integrally connected, it can be mechanically connected, or it can be electrically connected, it can be directly connected, or indirectly connected through an intermediate medium, it can be the communication between two elements. For those skilled in the art, the specific meaning of the above terms in the utility model can be understood through specific circumstances.

[0032] As Figures 1-11As shown, an outer rotor centrifugal fan housing assembly includes a housing 1 and a fixed end cover 2, the fixed end cover 2 is rotatably installed on the housing 1, the housing 1 is fixedly installed with an outer rotor assembly 3, the fixed end cover 2 is fixedly connected with a stator assembly 4, the outer rotor assembly 3 and the stator assembly 4 are oppositely arranged, the fixed end cover 2 is provided with a first flange 5, the housing 1 is provided with a second flange 6, the first flange 5 and the second flange 6 are oppositely arranged, the second flange 6 is fixedly connected with a heat dissipation impeller 7, the first flange 5 and the heat dissipation impeller 7 are provided with a labyrinth seal structure, the heat dissipation impeller 7 is located at the periphery of the labyrinth seal structure, the first flange 5 is provided with a heat dissipation fin 8, the first flange 5 is provided with a mounting hole 9 fixedly connected with the outside, and the fixed end cover 2 and the fixed end cover 2 are integrally cast.

[0033] The second flange 6 includes a flange ring matched with the housing 1, the flange ring is sleeved and welded on the housing 1, and the flange ring has a flange protruding radially and outwardly along the housing 1, and the heat dissipation impeller 7 is fixed on the flange of the flange ring by screws.

[0034] The heat dissipation impeller 7 includes an outer ring body 701, a plurality of first convex rings 702 are arranged on one side of the outer ring body 701 along the radial direction thereof from inside to outside at intervals, a plurality of heat dissipation blades 703 are arranged on one side of the outer ring body 701, the heat dissipation blades 703 and the first convex rings 702 are located on the same side of the outer ring body 701, the plurality of heat dissipation blades 703 are located at the periphery of the plurality of first convex rings 702, the height of the plurality of first convex rings 702 along the axial direction of the outer ring body 701 gradually decreases from inside to outside, a plurality of second convex rings 501 are arranged on the first flange 5 along the radial direction thereof from inside to outside at intervals, the height of the plurality of second convex rings 501 along the axial direction of the fixed end cover 2 gradually decreases from inside to outside, the first convex rings 702 and the second convex rings 501 are oppositely arranged, one of the first convex rings 702 is arranged between two adjacent second convex rings 501 and forms a sealing structure, the first convex ring 702 arranged between two adjacent second convex rings 501 has a gap, and the plurality of heat dissipation blades 703 are spaced from each other and arranged inclined in the same direction.

[0035] In use, the housing 1 rotates, the second flange 6 and the heat dissipation impeller 7 on the housing 1 rotate with it, the heat dissipation impeller 7 plays a role in dissipating heat inside the housing 1 and the fixed end cover 2, and cooperates with the labyrinth seal structure between the heat dissipation impeller 7 and the first flange 5, the labyrinth seal has no friction with each other during work, so the power consumption is relatively low, and the service life is relatively long, the non-contact sealing mode makes it unnecessary to be lubricated, and it is suitable for high temperature and high speed occasions, the small channels of the labyrinth seal have a certain self-cleaning function and are not easily affected by pollutants or solid particles, so it can maintain good sealing performance in a relatively harsh working environment.

[0036] The above ideal embodiment of the utility model is an inspiration, and through the above description, relevant staff can make various changes and modifications without deviating from the technical idea of the utility model. The technical scope of the utility model is not limited to the content in the specification, and the technical scope must be determined according to the scope of claims.

Claims

1. An external rotor centrifugal fan housing assembly, comprising a housing (1) and a fixed end cover (2) rotatably mounted on the housing (1), wherein an external rotor assembly (3) is fixedly mounted on the housing (1), and a stator assembly (4) is fixedly connected to the fixed end cover (2), the external rotor assembly (3) and the stator assembly (4) are arranged opposite to each other, characterized in that: The fixed end cover (2) is provided with a first flange (5), and the housing (1) is provided with a second flange (6). The first flange (5) and the second flange (6) are arranged opposite to each other. A heat dissipation impeller (7) is fixedly connected to the second flange (6). A labyrinth seal structure is provided between the first flange (5) and the heat dissipation impeller (7). The heat dissipation impeller (7) is located outside the labyrinth seal structure.

2. The external rotor centrifugal fan housing assembly according to claim 1, characterized in that: The second flange (6) includes a flange ring that matches the housing (1) and is fixed to the housing (1). The flange ring has a flange that protrudes radially outward from the housing (1), and the heat dissipation impeller (7) is fixedly mounted on the flange.

3. The external rotor centrifugal fan housing assembly according to claim 1, characterized in that: The heat dissipation impeller (7) is fixed to the flange by screws.

4. The external rotor centrifugal fan housing assembly according to claim 1, characterized in that: The heat dissipation impeller (7) includes an outer ring body (701). A plurality of first convex rings (702) are arranged radially from the inside to the outside on one side of the outer ring body (701). A plurality of heat dissipation blades (703) are arranged on one side of the outer ring body (701). The plurality of heat dissipation blades (703) are located around the plurality of first convex rings (702). A plurality of second convex rings (501) are arranged radially from the inside to the outside on the first flange (5). The first convex rings (702) and the second convex rings (501) are arranged opposite to each other. One of the first convex rings (702) is arranged between two adjacent second convex rings (501) and has a gap.

5. The external rotor centrifugal fan housing assembly according to claim 4, characterized in that: The height of several of the first convex rings (702) along the axial direction of the outer ring body (701) gradually decreases from the inside to the outside.

6. The external rotor centrifugal fan housing assembly according to claim 5, characterized in that: The height of several second convex rings (501) along the axial direction of the fixed end cap (2) gradually decreases from the inside to the outside.

7. The external rotor centrifugal fan housing assembly according to claim 4, 5, or 6, characterized in that: Several heat dissipation blades (703) are spaced apart from each other and inclined in the same direction.

8. The external rotor centrifugal fan housing assembly according to claim 1, characterized in that: The first flange (5) is provided with heat dissipation fins (8).

9. The external rotor centrifugal fan housing assembly according to claim 1, characterized in that: The first flange (5) is provided with mounting holes (9) for fixed connection with the outside.

10. The external rotor centrifugal fan housing assembly according to claim 1, characterized in that: The fixed end cap (2) and the fixed end cap (2) are integrally formed.

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