Modular split type axial flow fan

Abstract

The utility model relates to a modularized split type axial flow fan which sequentially comprises a fan front shell and a fan rear shell which are installed together from left to right, an impeller is installed in the fan front shell, and a motor assembly is installed in the position, on the right side of the impeller, in the rear shell. A plurality of first blades are evenly distributed on the left side of the impeller in the circumferential direction, a plurality of second blades are evenly distributed on the right side of the impeller in the circumferential direction, a plurality of diffusers are evenly distributed on the outer side of the left side of the motor front shell in the circumferential direction, and a drainage outlet is formed in the position, on the right side of the impeller, of the motor front shell. A continuous airflow path is formed by the diffuser on the front shell of the motor and the first blades on the impeller, airflow impact and vortex generation are reduced, and therefore high-frequency noise is reduced. The modular degree and adaptability of the fan are improved, and maintenance and product serialization are facilitated.

Description

Technical Field

[0001] This utility model relates to the field of compressor cooling technology, and in particular to a modular split-type axial flow fan. Background Technology

[0002] Axial flow fans are widely used; they are a type of fan where the airflow direction is the same as the fan blade axis, such as electric fans and air conditioner outdoor unit fans. They are called "axial flow" because the gas flows parallel to the fan axis. Axial flow fans are typically used in applications requiring high flow rates but low pressure. An axial flow fan is fixed in position and moves air.

[0003] A search revealed Chinese patent publication number CN217233829U, which discloses an axial flow fan, comprising: a guide plate, which includes a hollow bearing and an outer ring, with guide blades sandwiched between them, and multiple cooling air inlets distributed circumferentially on the outer ring; a motor, which is connected to the outer ring of the hollow bearing, with the motor's output shaft passing through the inner ring of the hollow bearing, and the motor's interior communicating with the cooling air inlets; an impeller, which is connected to the motor's output shaft; a pressure shell, which is connected to the outer ring, and is fitted around the impeller, with a negative pressure exhaust port on the pressure shell; and a cooling air pipe, one end of which is connected to the negative pressure exhaust port, and the other end of which is connected to the interior of the motor.

[0004] In summary, in existing axial flow fans, the straight blades are prone to airflow separation during rotation, especially forming vortices at the junction of the blade root and tip; and the gas directly enters the straight cylindrical channel after exiting the impeller, resulting in low static pressure recovery efficiency.

[0005] In view of the above-mentioned shortcomings, the designer actively researched and innovated in order to create a modular split axial flow fan, which would make it more valuable for industrial applications. Utility Model Content

[0006] To solve the above-mentioned technical problems, the purpose of this utility model is to provide a modular split-type axial flow fan.

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

[0008] A modular split-type axial flow fan includes, from left to right, a fan front housing and a fan rear housing installed together. An impeller is installed inside the fan front housing, and a motor assembly is installed inside the rear housing to the right of the impeller. The motor assembly includes, from left to right, a motor front housing and a motor rear housing installed together. A stator assembly is installed inside the motor rear housing, and a rotor assembly installed inside the stator assembly can pass through the motor front housing and connect to the impeller on the left side.

[0009] Several first blades are evenly distributed along the circumference on the left side of the impeller, several second blades are evenly distributed along the circumference on the right side of the impeller, several diffusers are evenly distributed along the circumference on the outer side of the left side of the motor front housing, and a drain outlet is provided on the motor front housing on the right side of the impeller.

[0010] The rotor assembly, from left to right, includes a main shaft and a secondary shaft mounted together, with magnets installed inside the secondary shaft.

[0011] As a further improvement of this utility model, a mounting bracket is installed on the front casing of the fan.

[0012] As a further improvement of this utility model, an air inlet is detachably installed on the left side of the front housing of the fan.

[0013] As a further improvement of this utility model, an air outlet integrally formed therewith is provided on the right side of the rear housing of the fan.

[0014] As a further improvement of this utility model, an air outlet pipe and an air inlet pipe are installed sequentially from left to right on the rear housing of the fan. The air outlet pipe is connected to the main cavity of the housing inside the rear housing of the fan, and the air inlet pipe is connected to the motor cooling cavity inside the rear housing of the motor.

[0015] As a further improvement of this utility model, the diffuser has an arc-shaped blade structure.

[0016] As a further improvement of this utility model, the diffuser is detachably mounted on the front housing of the motor.

[0017] As a further improvement of this utility model, the first blade is an arc-shaped blade structure with a spiral distribution, and the second blade is a strip-shaped blade structure.

[0018] As a further improvement of this utility model, the drainage outlet is a funnel-shaped structure that diffuses from right to left.

[0019] By means of the above solution, this utility model has at least the following advantages:

[0020] This invention uses the diffuser on the front housing of the motor and the first blade on the impeller to form a continuous airflow path, thereby reducing airflow impact and eddy current generation, and thus reducing high-frequency noise.

[0021] This invention reduces the outlet velocity by gradually expanding the flow channel at the outlet, thereby reducing turbulence and local resistance losses. Furthermore, in combination with the second blade on the impeller, the flow velocity is further reduced and the static pressure recovery efficiency is improved by gradually increasing the cross-sectional area of ​​the flow channel.

[0022] This invention improves the modularity and adaptability of the fan, making it easier to maintain and serialize products.

[0023] 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

[0024] 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.

[0025] Figure 1 This is a schematic diagram of the structure of a modular split-type axial flow fan according to this utility model;

[0026] Figure 2 yes Figure 1 Center view;

[0027] Figure 3 It is about Figure 2 Cross-sectional view of AA in the middle;

[0028] Figure 4 yes Figure 3 Schematic diagram of the structure of the intermediate rotor assembly;

[0029] Figure 5 yes Figure 3 A schematic diagram of the structure of the intermediate impeller and the diffuser on the front housing of the motor;

[0030] Figure 6 yes Figure 3 A schematic diagram of the middle impeller.

[0031] The meanings of the labels in the figures are as follows.

[0032] 1. Front casing of the fan; 2. Rear casing of the fan; 3. Motor assembly; 4. Mounting bracket; 5. Air inlet; 6. Air outlet; 7. Air outlet pipe; 8. Air inlet pipe; 9. Rear casing of the motor; 10. Front casing of the motor; 11. Stator assembly; 12. Rotor assembly; 13. Impeller; 14. Diffuser; 15. Main shaft; 16. Secondary shaft; 17. Magnet; 18. First blade; 19. Second blade; 20. Detailed Implementation

[0033] 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.

[0034] 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.

[0035] The first embodiment of this utility model:

[0036] like Figures 1-3 The modular split-type axial flow fan of this embodiment mainly includes a front casing 1, a rear casing 2, a motor assembly 3, and an impeller 13.

[0037] The front casing 1 and the rear casing 2 of the fan are assembled together from left to right. A mounting bracket 4 is installed on the front casing 1 of the fan, through which the entire equipment can be fixedly installed on the workbench.

[0038] An air inlet 5 is detachably installed on the left side of the front housing 1 of the fan. The air inlet 5 is installed on the fan housing by means of a snap or bolt, and can be switched according to different working conditions to adapt to the customer's specific installation structure and airflow requirements.

[0039] An air outlet 6, integrally formed with the rear casing 2 of the fan, is provided on the right side.

[0040] like Figure 5 and Figure 6 An impeller 13 is installed inside the front casing 1 of the fan on the right side of the air inlet 5. Several spirally distributed arc-shaped first blades 19 are evenly distributed along the circumference on the left side of the impeller 13. Through rotation, they form a continuous spiral flow channel, effectively improving the conversion efficiency of gas kinetic energy to pressure. This structure reduces turbulence losses at the impeller inlet and, together with the diffuser 14 with its arc-shaped blade structure, forms a smooth diffusion path, enabling more efficient conversion of kinetic energy into static pressure energy.

[0041] like Figure 5Several diffusers 14 with arc-shaped blade structures are evenly distributed along the circumferential direction on the outer side of the left side of the motor front housing 10. The diffusers 14 with arc-shaped blade structures form a continuous airflow path with the spiral flow channel of the first blade 19, reducing airflow impact and vortex generation, thereby reducing high-frequency noise. In addition, the inlet angle of the arc-shaped blade structure matches the airflow direction of the first blade 19, which can avoid energy loss caused by airflow separation.

[0042] The aforementioned diffuser 14 is detachably mounted on the front housing 10 of the motor. It can be installed in a groove on the front housing 10 of the motor by means of embedding or plugging, and is locked in place by bolts or other structures. Specifically, the diffuser 14 is manufactured using powder metallurgy technology and is inserted into the fan housing, matching the impeller. Its main function is to convert the kinetic energy of the fluid into pressure energy, thereby achieving airflow deceleration and pressurization. Different structures can be quickly replaced to adjust performance.

[0043] The diffuser 14, with its detachable structure, can be customized and replaced according to usage requirements to adapt to different flow or pressure conditions.

[0044] like Figure 6 On the right side of the impeller 13, several strip-shaped blades 20 are evenly distributed along the circumference. Their linear distribution can rectify the airflow on the right side, reduce the tangential velocity component, and reduce the risk of flow separation.

[0045] like Figure 3 On the motor front housing 10 to the right of the impeller 13, there is a funnel-shaped outlet 15 that diffuses from right to left. The funnel-shaped diffuser reduces the outlet velocity through the gradually expanding flow channel, thereby reducing turbulence and local resistance loss. This design ensures a stable airflow output while avoiding the sudden diffusion phenomenon of traditional right-angle outlets, significantly reducing aerodynamic noise.

[0046] In addition, by gradually expanding the flow channel at the outlet 15, the outlet velocity is reduced, thereby reducing turbulence and local resistance losses. Furthermore, in combination with the second blade 20 on the impeller, the flow velocity is further reduced and the static pressure recovery efficiency is improved by gradually expanding the cross-sectional area of ​​the flow channel.

[0047] The second embodiment of this utility model:

[0048] Based on the first embodiment described above, such as Figure 3 As shown, a motor assembly 3 is installed in the rear housing 2 on the right side of the impeller 13. The motor assembly 3 includes a front motor housing 10 and a rear motor housing 9 installed together from left to right. A stator assembly 11 is installed in the rear motor housing 9. A rotor assembly 12 installed in the stator assembly 11 can pass through the front motor housing 10 and connect to the impeller 13 on the left side.

[0049] like Figure 4 The rotor assembly 12 includes, from left to right, a main shaft 16 and a secondary shaft 17 mounted together, with a magnet 18 installed inside the secondary shaft 17.

[0050] The magnet 18 and the main spindle 16 are designed as separate parts. The magnet 18 is first press-fitted into the auxiliary shaft 17 (magnet shaft), and then connected to the main spindle 16 by threads. The main spindle 16 serves as the bearing support part. This design allows the main spindle 16 and the magnet 18 to use different materials and surface treatments, which improves the machining accuracy of the shaft and effectively reduces manufacturing costs, while also facilitating maintenance and replacement.

[0051] Specifically, the magnet 18 component is a neodymium iron boron permanent magnet, the secondary shaft 17 is made of stainless steel or titanium alloy, and the main shaft 16 is made of titanium alloy material with titanium nitride surface treatment.

[0052] The third embodiment of this utility model:

[0053] Based on the first and second embodiments described above, as follows: Figure 3 As shown, an exhaust pipe 7 and an intake pipe 8 are installed sequentially from left to right on the rear housing 2 of the fan. The exhaust pipe 7 is connected to the main cavity of the rear housing 2, and the intake pipe 8 is connected to the motor cooling cavity of the rear housing 9. The intake pipe 8 is connected to external cooling equipment such as a cooler to introduce cooling gas into the motor cooling cavity and cool the stator assembly 11 and rotor assembly 12 inside the motor cooling cavity. The incoming cooling gas is discharged through the outlet 15 on the left side of the front housing 10 of the motor after processing, and then flows back into the main cavity of the housing with the help of the second blade 20. A small portion of the returned gas can then be discharged through the exhaust pipe 7 into the aforementioned cooling equipment, and the cycle repeats.

[0054] Through modular and split-type structural design, the axial flow fan of this invention has higher flexibility, maintainability and performance expandability, making it suitable for the high-performance requirements of modern industrial equipment.

[0055] In summary, the axial flow fan of this invention provides a high-performance, flexible and adjustable air intake optimization solution, which is particularly suitable for high-speed axial flow blower systems that need to operate at fixed operating points for extended periods.

[0056] 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.

[0057] 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.

[0058] 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 modular split-type axial flow fan, comprising, from left to right, a fan front housing (1) and a fan rear housing (2) installed together, wherein an impeller (13) is installed in the fan front housing (1), and a motor assembly (3) is installed in the rear housing (2) to the right of the impeller (13), wherein the motor assembly (3) comprises, from left to right, a motor front housing (10) and a motor rear housing (9) installed together, wherein a stator assembly (11) is installed in the motor rear housing (9), and a rotor assembly (12) installed in the stator assembly (11) can pass through the motor front housing (10) and be connected to the impeller (13) on the left side; Its features are: Several first blades (19) are evenly distributed along the circumferential direction on the left side of the impeller (13), several second blades (20) are evenly distributed along the circumferential direction on the right side of the impeller (13), several diffusers (14) are evenly distributed along the circumferential direction on the outer side of the left side of the motor front housing (10), and a drain outlet (15) is provided on the motor front housing (10) on the right side of the impeller (13). The rotor assembly (12) includes, from left to right, a main shaft (16) and a secondary shaft (17) mounted together, with a magnet (18) installed inside the secondary shaft (17).

2. The modular split-type axial flow fan as described in claim 1, characterized in that, A mounting bracket (4) is installed on the front casing (1) of the fan.

3. A modular split-type axial flow fan as described in claim 1, characterized in that, An air inlet (5) is detachably installed on the left side of the front housing (1) of the fan.

4. A modular split-type axial flow fan as described in claim 1, characterized in that, An air outlet (6) integrally formed with the rear housing (2) of the fan is provided on the right side.

5. A modular split-type axial flow fan as described in claim 1, characterized in that, An exhaust pipe (7) and an intake pipe (8) are installed sequentially from left to right on the rear housing (2) of the fan. The exhaust pipe (7) is connected to the main cavity of the housing inside the rear housing (2) of the fan, and the intake pipe (8) is connected to the motor cooling cavity inside the rear housing (9) of the motor.

6. A modular split-type axial flow fan as described in claim 1, characterized in that, The diffuser (14) has an arc-shaped blade structure.

7. A modular split-type axial flow fan as described in claim 1, characterized in that, The diffuser (14) is detachably mounted on the front housing (10) of the motor.

8. A modular split-type axial flow fan as described in claim 1, characterized in that, The first blade (19) is an arc-shaped blade structure with a spiral distribution, and the second blade (20) is a strip-shaped blade structure.

9. A modular split-type axial flow fan as described in claim 1, characterized in that, The drainage outlet (15) is a funnel-shaped structure that diffuses from right to left.

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