Centrifugal fan with low-resistance drainage function

Abstract

The utility model relates to the technical field of centrifugal fans, in particular to a centrifugal fan with a low-resistance drainage function, which mainly comprises a mounting seat, a centrifugal machine cover is arranged at the top end of the mounting seat, a power motor is mounted at the rear end of the centrifugal machine cover, and a flow guide pipe is arranged at the front end of the centrifugal machine cover. An arc-shaped groove is formed in the front end of the inner side of the flow guide pipe, a flow equalizing plate is arranged in the middle of the inner side of the flow guide pipe, and the exhaust pipe is arranged at the top end of the centrifugal machine cover. According to the centrifugal fan with the low-resistance drainage function, the arc-shaped groove is formed in the front end of the inner side of the flow guide pipe, sudden change of the flow direction of airflow is reduced through arc guiding, the flow equalizing plate convenient to disassemble is arranged on the inner side, airflow in different directions and flow directions is subjected to flow equalizing adjustment, resistance generated by mutual collision of the airflow is reduced, and the flow guide effect is improved. Resistance is reduced in the drainage process, smooth circulation of gas is facilitated, the probability of connection looseness of the flow guide pipe and the centrifugal machine cover is reduced, and the service life of equipment is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to centrifugal fan technical field, concretely is a centrifugal fan with low resistance drainage function. BACKGROUND

[0002] Centrifugal fan is a kind of fluid machinery relying on centrifugal force principle, is widely used in ventilation, exhaust, cooling, dust removal etc., usually working principle is that gas enters impeller axially, is thrown out radially by centrifugal force, is discharged after being pressurized by volute.

[0003] The existing centrifugal fan needs to be transported to the outside environment by the flow guide mechanism in the process of using hot air to be transported in the fan, because the centrifugal speed is fast, the flow guide ring of straight cylinder has poor drainage effect, and the resistance is large, at this time, the fan will produce a certain vibration, under the condition that the resistance generated by the flow guide device continues to increase, the connection between the flow guide structure and the machine cover body is easy to loosen, and under the action of wind force, the stress of the welding place of the flow guide cover is uneven, cracks are easy to produce, so that the equipment cannot be used normally, the service life of the fan is affected, and optimization and improvement are needed. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a centrifugal fan with low resistance drainage function to solve the problem that the flow guide structure is difficult to guide flow with low resistance, which leads to the connection between the flow guide structure and the machine cover being easy to loosen.

[0005] To achieve the above object, the utility model provides the following technical scheme: a centrifugal fan with low resistance drainage function, comprising: a mounting seat, the top end of the mounting seat is provided with a centrifuge cover, and the rear end of the centrifuge cover is provided with a power motor, further comprising a flow equalizing adjusting assembly and a flow dividing adjusting assembly:

[0006] The flow equalizing adjusting assembly comprises a flow guide pipe, the flow guide pipe is arranged at the front end of the centrifuge cover, the inner side front end of the flow guide pipe is provided with an arc-shaped groove, the inner side middle part of the flow guide pipe is provided with a flow equalizing plate, and the flow equalizing adjusting assembly is used for flow equalizing adjustment of the centrifugal fan; the flow dividing adjusting assembly comprises an exhaust pipe, the exhaust pipe is arranged at the top end of the centrifuge cover, and the top end of the exhaust pipe is provided with an expansion frame, the inner side of the expansion frame is provided with a Y-shaped flow dividing plate, and the flow dividing adjusting assembly is used for flow dividing adjustment of the gas outflow of the centrifugal fan.

[0007] Preferably, the front end of the centrifuge cover is fixedly connected with a mounting ring, the inner side of the mounting ring is connected with a gasket one, and the front end of the gasket one is connected with a butt joint column.

[0008] Preferably, the outer side of the flow guide pipe is connected with a mounting plate, and the inside of the mounting plate is connected with a positioning screw rod.

[0009] Preferably, the back wall of the flow guide pipe is internally connected with a gasket two, which is provided with a butt joint hole.

[0010] Preferably, the inner side of the flow guide pipe is provided with a guide groove at the upper end and the lower end, and a rotating clamping groove is arranged at the middle part of the inner side of the flow guide pipe.

[0011] Preferably, the outer side of the flow uniformizing plate is connected with a clamping block, and the width of the clamping block is same as that of the guide groove.

[0012] Preferably, the two sides of the expansion frame are both provided with a positioning plate, and the positioning plate is fixedly connected with the air exhaust pipe.

[0013] Preferably, the inner side of the Y-shaped flow dividing plate is provided with a flow dividing hole.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] The utility model discloses a flow guide pipe, which is characterized by arranging an arc-shaped groove at the front end of the inner side of the flow guide pipe, reducing the sudden change of airflow direction through the arc-shaped guide, arranging a flow uniformizing plate at the inner side, which is convenient to remove, adjusting the airflow of different directions, reducing the mutual collision of airflow, reducing the resistance in the process of guiding, facilitating the smooth flow of gas, reducing the probability of loosening of the connection between the flow guide pipe and the centrifuge cover, and prolonging the service life of the equipment.

[0016] The utility model discloses a flow guide pipe, which is characterized by arranging an arc-shaped groove at the front end of the inner side of the flow guide pipe, reducing the sudden change of airflow direction through the arc-shaped guide, arranging a flow uniformizing plate at the inner side, which is convenient to remove, adjusting the airflow of different directions, reducing the mutual collision of airflow, reducing the resistance in the process of guiding, facilitating the smooth flow of gas, reducing the probability of loosening of the connection between the flow guide pipe and the centrifuge cover, and prolonging the service life of the equipment. ACCURATE DRAWINGS

[0017] Figure 1 It is a three-dimensional structure schematic diagram of the utility model;

[0018] Figure 2 It is a local separated three-dimensional structure schematic diagram of the flow uniformizing and adjusting assembly of the utility model;

[0019] Figure 3 It is a local section three-dimensional structure schematic diagram of the flow guide pipe of the utility model;

[0020] Figure 4 It is a local section three-dimensional structure schematic diagram of the flow dividing and adjusting assembly of the utility model.

[0021] In the diagram: 1. Mounting base; 2. Centrifuge cover; 3. Power motor; 4. Mounting ring; 5. Guide pipe; 6. Exhaust pipe; 7. Mounting plate; 8. Positioning screw; 9. Gasket 1; 10. Connecting post; 11. Gasket 2; 12. Arc groove; 13. Guide groove; 14. Flow equalization plate; 15. Locking block; 16. Rotating slot; 17. Expansion frame; 18. Positioning plate; 19. Y-shaped flow divider plate; 20. Flow divider hole. Detailed Implementation

[0022] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0023] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0024] like Figure 1 - Figure 4 As shown, this application provides a centrifugal fan with low resistance flow diversion function, including: a mounting base 1, a centrifuge cover 2 is provided at the top of the mounting base 1, and a power motor 3 is installed at the rear end of the centrifuge cover 2;

[0025] The flow equalization adjustment component includes a flow guide pipe 5, which is located at the front end of the centrifuge shroud 2. An arc-shaped groove 12 is provided at the front end of the inner side of the flow guide pipe 5, and a flow equalization plate 14 is provided at the middle of the inner side of the flow guide pipe 5. The flow equalization adjustment component is used for the flow equalization adjustment of the centrifugal fan's air inlet.

[0026] Specifically, such as Figure 2 As shown, a mounting ring 4 is fixedly connected to the front end of the centrifuge cover 2, and a gasket 9 is connected to the inner side of the mounting ring 4. A docking post 10 is connected to the front end of the gasket 9. A gasket 11 is connected to the inner side of the rear wall of the guide tube 5. The gasket 11 is provided with a docking hole. The mounting ring 4 is fitted with one side of the guide tube 5. Then, the gaskets 9 and 11 on both sides are brought close to each other and fitted together. The inner docking post 10 and the docking hole are inserted to improve the sealing of the connection.

[0027] Specifically, such as Figure 2 As shown, the outer side of the guide tube 5 is connected to the mounting plate 7, and the inside of the mounting plate 7 is connected to the positioning screw 8. The mounting plate 7 is connected close to the mounting ring 4 to facilitate the connection and fastening of the guide tube 5.

[0028] Specifically, such as Figure 3As shown, the inner side of the flow guide pipe 5 is provided with a guide slot 13 at both ends, and the middle part of the inner side of the flow guide pipe 5 is provided with a rotating clamping groove 16. The clamping block 15 can slide at the front end of the guide slot 13, and then rotate and clamp and position when reaching the rotating clamping groove 16, to ensure the easy disassembly of the flow uniformity plate 14.

[0029] Specifically, as shown in the figure, Figure 3 The outer side of the flow uniformity plate 14 is connected with the clamping block 15, and the width of the clamping block 15 is the same as that of the guide slot 13. The clamping block 15 can slide in the guide slot 13, avoiding the shift of the moving position.

[0030] The shunt adjusting assembly includes an exhaust pipe 6 provided at the top end of the centrifuge cover 2, and the top end of the exhaust pipe 6 is provided with an expansion frame 17. The inner side of the expansion frame 17 is provided with a Y-shaped shunt plate 19. The shunt adjusting assembly is used for shunt adjustment of the gas flow of the centrifugal fan.

[0031] Specifically, as shown in the figure, Figure 4 The two sides of the expansion frame 17 are both provided with a positioning plate 18, and the positioning plate 18 is fixedly connected with the exhaust pipe 6. The positioning plate 18 is connected at the abutting position of the expansion frame 17 and the exhaust pipe 6, and is tightly connected, reducing the shaking of the airflow circulation.

[0032] Specifically, as shown in the figure, Figure 4 The inner side of the Y-shaped shunt plate 19 is provided with a shunt hole 20, and the shunt angle of the Y-shaped shunt plate 19 is less than thirty degrees. The Y-shaped shunt plate 19 cooperates with the side wall of the expansion frame 17 to shunt, reducing the inner wall pressure of the exhaust pipe 6.

[0033] In this embodiment: An arc-shaped slot 12 is arranged at the inner side of the front end of the flow guide pipe 5, so that the inner side space of the flow guide pipe 5 is wide at the front and narrow at the back, presenting a certain arc gradual change, reducing the sudden change of the airflow direction. The flow uniformity plate 14 is arranged at the inner side, which can adjust the airflow of different directions, reduce the resistance caused by the mutual collision of the airflow, and reduce the probability of loose connection between the flow guide pipe 5 and the centrifuge cover 2. The expansion frame 17 is arranged at the top end of the exhaust pipe 6 to expand the space, and the Y-shaped shunt plate 19 at the inner side divides the discharged airflow into two streams, reducing the impact of the airflow on the wall of the exhaust pipe 6.

[0034] The specific scheme is: firstly, when installing the front end flow guide pipe 5 of the centrifugal fan, the installation ring 4 is attached to one side of the flow guide pipe 5, then the gasket one 9 and the gasket two 11 on both sides are attached to each other, the inner side butt joint column 10 and the butt joint hole are inserted, the sealing of the connection is improved, then the installation plate 7 is close to the installation ring 4 for connection, the connection and fastening of the flow guide pipe 5 are facilitated, when the centrifugal fan starts, the power motor 3 drives the turbine in the centrifugal cover 2 to rotate, the airflow is flowed into through the flow guide pipe 5, and is discharged after being pressurized by the centrifugal cover 2, when the airflow enters the flow guide pipe 5, the airflow is guided by the arc-shaped groove 12, the sudden change of the airflow direction is reduced, the inner side is provided with the flow equalizing plate 14 which is convenient to remove, the airflow in different directions is equalized and adjusted, the mutual collision of the airflows is reduced, the stability of the flow guide pipe 5 is improved, then when the airflow is discharged through the exhaust pipe 6, the space is expanded through the expansion frame 17, the Y-shaped flow dividing plate 19 on the inner side divides the discharged airflow into two, the impact of the airflow on the wall of the exhaust pipe 6 is reduced, and the service life of the equipment is improved.

[0035] Those skilled in the art should understand that the discussion of the above any embodiment is only exemplary; under the idea of the present application, the technical features in the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other changes of different aspects of the present application as described above, which are not provided in details for the sake of simplicity.

[0036] The present application is intended to cover all such alternatives, modifications, and variations as fall within the broad scope of the appended claims. Accordingly, any and all such alternatives, modifications and variations are intended to be encompassed by the appended claims.

Claims

1. A centrifugal fan having a low resistance flow function, comprising: The mounting seat (1) is provided with a centrifuge cover (2) at the top end, and a power motor (3) is installed at the rear end of the centrifuge cover (2), characterized in that it further comprises: The flow uniformity adjusting assembly comprises a flow guide pipe (5) arranged at the front end of the centrifuge cover (2), an arc-shaped groove (12) is arranged at the inner front end of the flow guide pipe (5), a flow uniformity plate (14) is arranged at the inner middle part of the flow guide pipe (5), and the flow uniformity adjusting assembly is used for the inlet flow uniformity adjustment of the centrifugal fan. The flow distribution adjusting assembly comprises an exhaust pipe (6) arranged at the top end of the centrifuge cover (2), and an expansion frame (17) is arranged at the top end of the exhaust pipe (6), the inner side of the expansion frame (17) is provided with a Y-shaped flow distribution plate (19), and the flow distribution adjusting assembly is used for the flow distribution adjustment of the centrifugal fan gas.

2. The centrifugal fan with low resistance drainage function according to claim 1, characterized in that, The front end of the centrifuge cover (2) is fixedly connected with a mounting ring (4), and the inner side of the mounting ring (4) is connected with a gasket (9), and the front end of the gasket (9) is connected with a butt joint column (10).

3. The centrifugal fan with low resistance drainage function according to claim 2, characterized in that, The outer side of the flow guide pipe (5) is connected with a mounting plate (7), and the inner side of the mounting plate (7) is connected with a positioning screw rod (8).

4. The centrifugal fan with low resistance drainage function according to claim 1, characterized in that, The rear wall of the flow guide pipe (5) is connected with a gasket (11) inside, and the gasket (11) is provided with a butt joint hole.

5. The centrifugal fan with low resistance drainage function according to claim 1, characterized in that, The inner side of the flow guide pipe (5) is provided with a guide groove (13) at the upper and lower ends, and a rotating clamping groove (16) is arranged at the middle part of the inner side of the flow guide pipe (5).

6. The centrifugal fan with low resistance drainage function according to claim 5, characterized in that, The outer side of the flow uniformity plate (14) is connected with a clamping block (15), and the width of the clamping block (15) is the same as that of the guide groove (13).

7. The centrifugal fan with low resistance drainage function according to claim 1, characterized in that, The two sides of the expansion frame (17) are provided with positioning plates (18), and the positioning plates (18) are fixedly connected with the exhaust pipe (6).

8. The centrifugal fan with low resistance drainage function according to claim 1, characterized in that, The inner side of the Y-shaped flow distribution plate (19) is provided with a flow distribution hole (20).

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