Axial flow fan with integrated current collector and fan barrel

Abstract

The utility model relates to the technical field of axial flow fans, in particular to an axial flow fan with an integrated current collector and a fan barrel, which comprises the current collector and the fan barrel which are of an integrated structure, a resistance reduction device is assembled on the fan barrel, the fan barrel comprises a noise elimination outer barrel and a noise elimination inner barrel sleeved in the noise elimination outer barrel, and the noise elimination inner barrel is sleeved in the noise elimination outer barrel. The current collector is inserted between the silencing outer cylinder and the silencing inner cylinder and connected with the silencing outer cylinder, the resistance reduction device is located in the current collector and connected to the silencing inner cylinder in a sleeving mode, the resistance reduction device is connected with the silencing inner cylinder, and the small-diameter end of the current collector is inserted between the silencing outer cylinder and the silencing inner cylinder. The small-diameter end and the cylinder wall of the silencing outer cylinder are matched and attached to form an integrated structure in a riveting mode, and the resistance reduction device penetrates through the current collector and is arranged at the end of the silencing inner cylinder in a sleeving mode. According to the scheme, the overall structure can be simplified, the material consumption is reduced, the strength and stability are guaranteed, the fan efficiency is improved, the production period is shortened, and noise is better controlled.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of axial flow fan, concretely provides a kind of axial flow fan with integrated flow collector and fan barrel. BACKGROUND

[0002] The axial flow fan is the fan with the gas flow direction parallel to the fan axis, and is usually used in the occasions with high flow requirement and low pressure requirement, such as ventilation and air exchange in factories, warehouses, offices, residences and other places, and can also be used in cold air machines, evaporators, condensers and other equipment. The impeller front end of the axial flow fan is usually provided with a flow collector and a muffler barrel. The gas is guided to the impeller by the flow collector, and under the rotation of the impeller, the gas is worked to increase the pressure. The flow collector is mainly used to smoothly guide the gas to the impeller, to ensure the uniformity of the gas flow at the impeller inlet, and to improve the efficiency of the impeller.

[0003] At present, the flow collector and the fan barrel are independent of each other in the axial flow fan factory, and the two components need to be connected by a flange structure. Each component usually includes a plurality of support plate structures. The axial flow fan in the prior art has the following problems: 1) the independent structure needs to design additional support plates and connecting flanges, which increases the assembly steps and complexity, may cause assembly errors, and requires additional materials to manufacture support and connecting components, resulting in material waste and cost increase; 2) the separated design at the connection may cause air flow to turn, which increases the flow resistance and affects the overall efficiency of the fan; 3) the connection between the independent components may cause vibration during operation, which increases noise and affects the performance of the fan.

[0004] Therefore, in order to avoid the above problems, how to design an axial flow fan with integrated flow collector and fan barrel, which is simple to produce and assemble, can reduce material cost, reduce vibration and noise, is a problem to be solved at present. INVENTION CONTENTS

[0005] The utility model provides an axial flow fan with integrated flow collector and fan barrel to solve the above problems, which can reduce assembly complexity, reduce air flow loss, reduce material usage, reduce production cost, reduce vibration and noise.

[0006] The utility model provides an axial flow fan with integrated flow collector and fan barrel, which specifically includes a flow collector and a fan barrel with an integrated structure. The fan barrel is assembled with a drag reducer. The fan barrel includes a muffler outer barrel and a muffler inner barrel sleeved in the muffler outer barrel. The flow collector is inserted between the muffler outer barrel and the muffler inner barrel and connected with the muffler outer barrel as a whole. The drag reducer is located inside the flow collector and sleeved on the muffler inner barrel. The drag reducer is connected with the muffler inner barrel as a whole. The muffler outer barrel and the muffler inner barrel include an air flow channel.

[0007] Further, the current collector is a reduced diameter structure gradually reduced in diameter towards the fan cylinder direction, and the small-diameter end of the current collector close to the fan cylinder has an outer diameter smaller than the inner diameter of the sound-absorbing outer cylinder and larger than the outer diameter of the sound-absorbing inner cylinder.

[0008] Further, the small-diameter end of the current collector is inserted between the sound-absorbing outer cylinder and the sound-absorbing inner cylinder, and the small-diameter end is matched and attached to the cylinder wall of the sound-absorbing outer cylinder and is formed into an integrated structure by riveting.

[0009] Further, the inner diameter of the bottom end of the flow resistance reducer close to the fan cylinder is larger than the outer diameter of the sound-absorbing inner cylinder, and the flow resistance reducer passes through the current collector and is sleeved on the end of the sound-absorbing inner cylinder.

[0010] Further, the flow resistance reducer is matched and attached to the outer wall of the sound-absorbing inner cylinder and is connected into an integrated structure by riveting.

[0011] Further, the inner wall of the sound-absorbing outer cylinder is provided with a riveting hole one, the current collector is provided with a riveting hole two matched with the riveting hole one, and the riveting hole one and the riveting hole two are provided with a rivet one, and the sound-absorbing outer cylinder and the current collector are connected into an integrated structure by the rivet one.

[0012] Further, the outer wall of the sound-absorbing inner cylinder is provided with a riveting hole three, and the outer wall of the flow resistance reducer is provided with a riveting hole four matched with the riveting hole three, and the riveting hole three and the riveting hole four are provided with a rivet two, and the sound-absorbing inner cylinder and the flow resistance reducer are connected into an integrated structure by the rivet two.

[0013] Further, the inner diameter of the sound-absorbing inner cylinder is 0.4-0.8 times the inner diameter of the sound-absorbing outer cylinder, and the sound-absorbing inner cylinder and the sound-absorbing inner cylinder are connected by a connecting support arranged in the airflow channel.

[0014] Further, the connecting support includes two groups arranged close to the two side ends of the sound-absorbing outer cylinder and the sound-absorbing inner cylinder, respectively, and the two groups of connecting supports are uniformly and symmetrically arranged; the connecting support is a rectangular frame structure.

[0015] Further, the connecting support is uniformly arranged close to the middle part of the sound-absorbing outer cylinder and the sound-absorbing inner cylinder, and the connecting support is a guide vane structure.

[0016] Compared with the prior art, the utility model can achieve the following beneficial effects:

[0017] 1、The axial flow fan in the scheme is integrated with the fan cylinder into an integrated structure, without introducing the original support plate and support flange structure, thereby simplifying the overall structure, reducing the material usage while ensuring the strength and stability.

[0018] 2、The current scheme is that the current collector and the fan cylinder are riveted together, which can greatly reduce the welding amount, improve the production efficiency, shorten the production cycle, reduce the labor cost, and at the same time, the requirement for the welding process in the product production process is lower, the material cost and the welding process are reduced, and the overall stability and consistency are improved.

[0019] 3、The axial flow fan in the current scheme redesigns the flow channel, which can ensure smooth airflow, reduce turns and gaps, reduce flow resistance, improve fan efficiency, and enhance market competitiveness. At the same time, the design of the fan cylinder combined with the current collector helps to better control noise and improve customer satisfaction. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is a structure schematic diagram of the axial flow fan after assembly according to the embodiment one of the present application;

[0021] Figure 2 is an exploded structure schematic diagram of the axial flow fan according to the embodiment one of the present application Figure 1 ;

[0022] Figure 3 is an exploded structure schematic diagram of the axial flow fan according to the embodiment one of the present application Figure 2 ;

[0023] Figure 4 is a structure schematic diagram of the fan cylinder according to the embodiment of the present application;

[0024] Figure 5 is a connection structure schematic diagram of the current collector and the fan cylinder in the prior art.

[0025] The reference signs therein include: current collector 1, fan cylinder 2, resistance reducer 3, noise elimination outer cylinder 4, noise elimination inner cylinder 5, small diameter end 6, riveting hole one 7, riveting hole two 8, rivet one 9, riveting hole three 10, riveting hole four 11, rivet two 12, airflow flow channel 13, connection support 14, flange 15, support plate 16. DETAILED DESCRIPTION

[0026] In the following, the embodiments of the present application will be described with reference to the accompanying Figures 1-5 In the following description, the same modules are denoted by the same reference signs. In the case of the same reference signs, their names and functions are also the same. Therefore, the detailed description thereof will not be repeated.

[0027] In order to make the purpose, technical scheme and advantages of the present application more clear, the following will be further described in combination with the accompanying Figures 1-5 and specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application, but do not constitute a limitation on the present application. Example 1

[0028] like Figures 1-4 As shown, an axial flow fan with an integrated collector and fan housing includes an integrated collector 1 and a fan housing 2. A drag reducer 3 is mounted on the fan housing 2. The fan housing 2 includes a silencing outer cylinder 4 and a silencing inner cylinder 5 fitted inside the silencing outer cylinder 4. An airflow channel 13 is provided between the silencing outer cylinder 4 and the silencing inner cylinder 5. The silencing inner cylinder 5 is connected to the silencing inner cylinder 5 by a connecting bracket 14 disposed within the airflow channel 13. The inner diameter of the silencing inner cylinder 5 is 0.4-0.8 times the inner diameter of the silencing outer cylinder 4, thereby limiting the width of the airflow channel 13. Within this width range, the fan efficiency is high. Those skilled in the art can adjust the ratio of the inner diameters of the silencing inner cylinder 5 to the inner diameter of the silencing outer cylinder 4 according to actual needs to match the required width of the airflow channel 13. In this embodiment, the inner diameter of the silencing inner cylinder 5 is preferably 0.5 times or 0.6 times the inner diameter of the silencing outer cylinder 4.

[0029] like Figure 4 As shown, the connecting bracket 14 includes two sets of brackets respectively located near the two ends of the outer silencing cylinder 4 and the inner silencing cylinder 5. The two sets of connecting brackets 14 are evenly and symmetrically arranged, and the two sets of connecting brackets 14 are respectively as shown in the figure. Figure 4 As shown at points M and N, each set of connecting brackets 14 includes multiple connecting brackets 14 evenly distributed along the circumference. The connecting brackets 14 are rectangular frame structures. The connecting brackets 14 can ensure the connection strength between the sound-absorbing outer cylinder 4 and the sound-absorbing inner cylinder 5, and can reduce bends and gaps, and will not generate resistance to the airflow in the airflow channel 13.

[0030] like Figures 1-3 As shown, the collector 1 is inserted between the outer silencer cylinder 4 and the inner silencer cylinder 5. The collector 1 is connected to the outer silencer cylinder 4. The collector 1 is a reduced-diameter structure with its inner diameter gradually decreasing towards the fan cylinder 2. The outer diameter of the small-diameter end 6 of the collector 1, which is closer to the fan cylinder 2, is smaller than the inner diameter of the outer silencer cylinder 4, while the outer diameter of the small-diameter end 6 is larger than the outer diameter of the inner silencer cylinder 5. The small-diameter end 6 of the collector 1 is inserted between the outer silencer cylinder 4 and the inner silencer cylinder 5. The small-diameter end 6 matches and adheres to the cylinder wall of the outer silencer cylinder 4 and is riveted to form an integral structure. Specifically, a riveting hole 7 is provided on the inner wall of the outer silencer cylinder 4, and a riveting hole 8 matching the riveting hole 7 is provided on the collector 1. Rivets 9 are provided in the riveting holes 7 and 8, and the outer silencer cylinder 4 and the collector 1 are connected into one unit by the rivets 9.

[0031] like Figure 5As shown, the prior art collector 1 is welded with flange 15 below, the collector 1 is connected with the fan cylinder 2 through the flange 15, the sealing pad needs to be set between the flanges 15, there is a gap or step between the sealing pads, the airflow may form vortex, which will increase the flow resistance, in the embodiment, the collector 1 is inserted into the fan cylinder 2, the collector 1 and the fan cylinder 2 are integrated structure, the place where the airflow passes is smooth inner wall, which can reduce the flow resistance, ensure the smooth airflow in the airflow passage 13, the flow direction of the airflow is shown by the arrow D in the figure.

[0032] The flow reducer 3 is located inside the collector 1 and is sleeved on the sound attenuation inner cylinder 5, the flow reducer 3 is connected with the sound attenuation inner cylinder 5, the inner diameter of the flow reducer 3 near the bottom end of the side of the fan cylinder 2 is greater than the outer diameter of the sound attenuation inner cylinder 5, the flow reducer 3 passes through the collector 1 and is sleeved on the end of the sound attenuation inner cylinder 5, the flow reducer 3 is matched and fitted with the outer wall of the sound attenuation inner cylinder 5, and is connected as a whole by riveting. Specifically, the outer wall of the sound attenuation inner cylinder 5 is provided with riveting holes three 10, the outer wall of the flow reducer 3 is provided with riveting holes four 11 matched with the riveting holes three 10, and the riveting holes three 10 and the riveting holes four 11 are provided with rivets two 12, the sound attenuation inner cylinder 5 and the flow reducer 3 are connected as a whole by the rivets two 12.

[0033] As shown in the figure, Figure 5 In the prior art, a plurality of support frames 16 are welded between the flow reducer 3 and the collector 1, the support frames 16 increase the processing workload and material cost, and when the airflow enters in the D direction, the support frames 16 located at the airflow inlet will cause resistance loss to the airflow, which may cause the airflow to change direction, which is not conducive to the smooth airflow, in the embodiment, the flow reducer 3 and the fan cylinder 2 are integrated structure, as shown in the figure, Figure 1 When the airflow enters in the D direction, there is no any obstacle between the flow reducer 3 and the collector 1, which can greatly reduce the airflow resistance and improve the efficiency of the fan.

[0034] When assembling, the flow reducer 3 is riveted on the sound attenuation inner cylinder 5, then the collector 1 is inserted between the sound attenuation inner cylinder 5 and the sound attenuation outer cylinder 4, and the collector 1 and the sound attenuation outer cylinder 4 are riveted together. The airflow enters from the opening end of the large diameter end of the collector 1, i.e. the opening end of the horn, passes between the collector 1 and the flow reducer 3, and then enters the airflow passage 13, the end of the fan cylinder 2 away from the collector 1 is connected with a motor and an impeller, and the airflow enters the motor and the impeller through the airflow passage 13. Embodiment two

[0035] The difference between the embodiment and the embodiment one is that the connecting brackets 14 are evenly arranged near the middle part of the sound attenuation outer cylinder 4 and the sound attenuation inner cylinder 5, the connecting bracket 14 is a guide vane structure, and the inverted Y-shaped connecting bracket 14 is a special curved surface structure, which is convenient for guiding the airflow, and can further ensure the smooth airflow.

[0036] Although the embodiments of the present application have been shown and described above, it should be understood by those skilled in the art that the above embodiments are exemplary and should not be construed as limiting the present application. Those skilled in the art can make changes, modifications, replacements and variations to the above embodiments within the scope of the present application.

[0037] The specific embodiments of the present application described above do not constitute a limitation on the scope of protection of the present application. Any other corresponding changes and modifications made according to the technical concept of the present application should be included in the scope of protection of the present application.

Claims

1. A axial flow fan with an integrated collector and a fan cylinder, characterized in that, The fan cylinder (2) is provided with a flow collector (1) and a flow reducer (3); the fan cylinder (2) comprises a sound-attenuating outer cylinder (4) and a sound-attenuating inner cylinder (5) sleeved in the sound-attenuating outer cylinder (4); the flow collector (1) is inserted between the sound-attenuating outer cylinder (4) and the sound-attenuating inner cylinder (5) and is connected with the sound-attenuating outer cylinder (4) into an integrated structure; the flow reducer (3) is located inside the flow collector (1) and is sleeved on the sound-attenuating inner cylinder (5) and is connected with the sound-attenuating inner cylinder (5) into an integrated structure; and a gas flow channel (13) is arranged between the sound-attenuating outer cylinder (4) and the sound-attenuating inner cylinder (5).

2. The axial flow fan with integrated collector and fan cylinder according to claim 1, characterized in that The flow collector (1) is a reduced-diameter structure with a gradually reduced inner diameter towards the fan cylinder (2); and the outer diameter of the small-diameter end (6) of the flow collector (1) close to the fan cylinder (2) is smaller than the inner diameter of the sound-attenuating outer cylinder (4) and larger than the outer diameter of the sound-attenuating inner cylinder (5).

3. The axial flow fan with integrated collector and fan cylinder according to claim 2, characterized in that The small-diameter end (6) of the flow collector (1) is inserted between the sound-attenuating outer cylinder (4) and the sound-attenuating inner cylinder (5); the small-diameter end (6) is matched and attached to the cylinder wall of the sound-attenuating outer cylinder (4) and is connected into an integrated structure by riveting.

4. The axial flow fan with integrated collector and fan cylinder according to claim 3, characterized in that The inner diameter of the bottom end of the flow reducer (3) close to the fan cylinder (2) is larger than the outer diameter of the sound-attenuating inner cylinder (5); the flow reducer (3) passes through the flow collector (1) and is sleeved on the end of the sound-attenuating inner cylinder (5).

5. The axial flow fan with integrated collector and fan cylinder according to claim 4, characterized in that The flow reducer (3) is matched and attached to the outer wall of the sound-attenuating inner cylinder (5) and is connected into an integrated structure by riveting.

6. The axial flow fan with integrated collector and fan cylinder according to claim 5, characterized in that The inner wall of the sound-attenuating outer cylinder (4) is provided with a riveting hole one (7); the flow collector (1) is provided with a riveting hole two (8) matched with the riveting hole one (7); the riveting hole one (7) and the riveting hole two (8) are provided with a rivet one (9); and the sound-attenuating outer cylinder (4) and the flow collector (1) are connected into an integrated structure by the rivet one (9).

7. The axial flow fan with integrated collector and fan cylinder according to claim 6, characterized in that The outer wall of the sound-attenuating inner cylinder (5) is provided with a riveting hole three (10); the outer wall of the flow reducer (3) is provided with a riveting hole four (11) matched with the riveting hole three (10); the riveting hole three (10) and the riveting hole four (11) are provided with a rivet two (12); and the sound-attenuating inner cylinder (5) and the flow reducer (3) are connected into an integrated structure by the rivet two (12).

8. The axial flow fan with integrated collector and fan cylinder according to claim 7, characterized in that The inner diameter of the sound-attenuating inner cylinder (5) is 0.4-0.8 times of the inner diameter of the sound-attenuating outer cylinder (4); and the sound-attenuating outer cylinder (4) and the sound-attenuating inner cylinder (5) are connected by a connecting support (14) arranged in the gas flow channel (13).

9. The axial flow fan with integrated collector and fan cylinder according to claim 8, characterized in that The connecting support (14) comprises two groups arranged close to the two sides of the sound-attenuating outer cylinder (4) and the sound-attenuating inner cylinder (5); and the two groups of connecting supports (14) are uniformly and symmetrically arranged; and the connecting support (14) is a rectangular frame structure.

10. The axial flow fan with integrated collector and fan cylinder according to claim 8, characterized in that The connecting supports (14) are uniformly arranged close to the middle parts of the sound-attenuating outer cylinder (4) and the sound-attenuating inner cylinder (5); and the connecting support (14) is a guide vane structure.

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