Centrifugal fan impeller and centrifugal fan

Abstract

The centrifugal fan impeller comprises a base, a supporting plate is fixed to the top of the base, a volute is fixed to the top of the supporting plate, a motor is fixed to the surface of the volute and located on the back face of the volute, and a first combination plate is fixed to an air inlet in the front face of the volute. An extension plate is fixed to the surface of the first combination plate, a second combination plate is fixed to the outer surface of the extension plate, a baffle is fixed to the inner wall of the extension plate, a first filter screen is slidably connected to the surface of the baffle, a second filter screen is arranged on one side of the first filter screen, and a gear ring is slidably connected to the surface of the extension plate. And four bearing seats are fixed on the surface of the second combination plate. According to the utility model, the air inlet is subjected to dustproof filtration by arranging the double filter screens, and the fixation of the two filter screens can be relieved directly in a rotating manner, so that the filter screens are more convenient to disassemble and clean, the shutdown maintenance time is reduced, and the working efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of centrifugal fan technology, specifically to a centrifugal fan impeller and a centrifugal fan. Background Technology

[0002] Centrifugal fans are widely used in industrial and residential applications, and mainly consist of an impeller and a casing. They are widely used in mines and tunnels to increase internal air circulation, providing safety for workers inside.

[0003] A search of Chinese patent publication number CN215949884U reveals a centrifugal fan impeller and a centrifugal fan.

[0004] This utility model includes a fan casing, with a sound insulation layer fixedly connected to the inner wall of the casing. A centrifugal chamber is formed inside the sound insulation layer. A support plate is fixedly connected to the inner wall of the sound insulation layer, and a motor is fixedly connected to the top of the support plate. The motor output shaft is fixedly connected to a rotating shaft via a coupling. A slot is formed on the inner wall of the rotating shaft, and a locking block is movably connected to the rotating shaft via the slot. An impeller is fixedly connected to one side of the locking block, and a screw is fixedly connected to one end of the impeller. The rotating shaft and the impeller are movably connected via the screw, the locking block, and the slot. This centrifugal fan impeller and centrifugal fan have a long service life, can improve work efficiency, and provide a certain degree of safety protection.

[0005] However, the patent still has the following problems: Although the device intercepts dust in the mine area by setting up a filter screen, the filter screen is directly fixed to the heat dissipation tank. Since the amount of dust in the mine environment is large, the filter screen needs to be cleaned frequently. The direct fixation makes it difficult to remove and clean, which causes the device to spend a lot of time stopping to clean, affecting work efficiency. Utility Model Content

[0006] The purpose of this utility model is to provide a centrifugal fan impeller and a centrifugal fan, which uses a double filter screen to filter dust at the air inlet, and the two filter screens can be directly removed by rotation, making it more convenient to disassemble and clean the filter screens, reducing downtime for maintenance and improving work efficiency.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a centrifugal fan, comprising a base, a support plate fixed to the top of the base, a volute fixed to the top of the support plate, a motor fixed to the surface of the volute, the motor located on the back of the volute, a first combined plate fixed to the air inlet on the front of the volute, an extension plate fixed to the surface of the first combined plate, a second combined plate fixed to the outer surface of the extension plate, a baffle fixed to the inner wall of the extension plate, a first filter screen slidably connected to the surface of the baffle, a second filter screen disposed on one side of the first filter screen, a gear ring slidably connected to the surface of the extension plate, four bearing seats fixed to the surface of the second combined plate, a sleeve fixed to the inner wall of the bearing seats, a lead screw threaded through the inner wall of the sleeve, a connecting rod fixed to the bottom of the lead screw, a clamping plate fixed to the bottom of the connecting rod, a groove for cooperating with the first and second filter screens on the surface of the clamping plate, four slots for cooperating with the movement of the lead screw on the surface of the second combined plate, four through slots for cooperating with the movement of the lead screw on the surface of the extension plate, gears fixed to the surface of the sleeve, and the gear ring meshing with the surfaces of multiple gears.

[0008] As a preferred embodiment of the centrifugal fan of this utility model, two guide blocks are fixed to the inner wall of the through groove, and two sliding grooves are formed on the surface of the connecting rod, with the guide blocks slidably connected to the surface of the sliding grooves.

[0009] In a preferred embodiment of the centrifugal fan of this utility model, a guide rail is fixed to the surface of the first combined plate, and multiple sliders are slidably connected to the surface of the guide rail, with the sliders being fixedly connected to the surface of the toothed ring.

[0010] As a preferred embodiment of the centrifugal fan of this utility model, the toothed ring surface is evenly distributed with a plurality of operating plates, and the operating plates are fixedly connected to the toothed ring surface.

[0011] As a preferred embodiment of the centrifugal fan of this utility model, the bottom edge of the groove is provided with an inclined portion.

[0012] As a preferred embodiment of the centrifugal fan of this utility model, the base is fixed with a self-locking universal wheel, and extension blocks are fixed at the four corners of the base surface. A screw is threaded through the surface of the extension block, and a support shell is fixed at the bottom of the screw.

[0013] In a preferred embodiment of the centrifugal fan of this invention, the pore size of the second filter screen is larger than that of the first filter screen.

[0014] To achieve the above objectives, the present invention provides the following technical solution: a centrifugal fan impeller, comprising an impeller assembly disposed inside a volute, the impeller assembly comprising a rear disc, blades and a front disc, the motor output shaft passing through the rear disc and fixedly connected to the rear disc, the number of blades being multiple, the blades being fixedly connected to the surface of the rear disc, and the front disc being fixedly connected to the surface of the blades.

[0015] As a preferred embodiment of the centrifugal fan impeller of this utility model, the rear disc, blades and front disc are all composed of a core layer, a wear-resistant layer and an anti-corrosion layer, with the wear-resistant layer located on the surface of the core layer and the anti-corrosion layer located on the surface of the wear-resistant layer.

[0016] As a preferred embodiment of the centrifugal fan impeller of this utility model, the core layer of the rear disc, blades and front disc is made of alloy steel, the wear-resistant layer is a ceramic coating and the anti-corrosion layer is a Teflon coating.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0018] In operation, the surface of the first filter screen is located on the surface of the baffle and the groove, while the second filter screen is located inside the groove, thus securing both the first and second filters. When the first and second filters need to be disassembled and cleaned, the gear ring is rotated, causing multiple gears to rotate together. This allows the lead screw to be affected by the threads on the inner wall of the sleeve, causing the clamping plates to move away from the second filter screen. This allows the multiple clamping plates to simultaneously release their restraints on the first and second filters, after which the operator can directly pull the second and first filters outwards, enabling quick removal and cleaning of both filters. This shortens maintenance time, allowing workers to complete the cleaning or replacement of filters in a short time, improving overall work efficiency. Furthermore, this design eliminates the need for complex disassembly and assembly processes, and no tools are required during disassembly and assembly, making the process simpler and more efficient. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0020] Figure 2 This is a three-dimensional structural schematic diagram of the present invention from another perspective;

[0021] Figure 3 This is a partial cross-sectional structural diagram of the present invention;

[0022] Figure 4 This is a schematic diagram of the overall structure of the impeller in this utility model;

[0023] Figure 5 This is a partial cross-sectional structural diagram of the present invention;

[0024] Figure 6 This is a partial cross-sectional structural diagram of the present invention;

[0025] Figure 7 This is a partial structural schematic diagram of the present invention;

[0026] Figure 8This utility model Figure 1 Enlarged structural diagram at point A in the diagram;

[0027] Figure 9 This utility model Figure 5 A magnified structural diagram at point B in the diagram.

[0028] In the diagram: 1. Base; 2. Volute; 3. Impeller assembly; 301. Rear disc; 302. Blade; 303. Front disc; 4. Motor; 5. Support plate; 6. First combined plate; 7. Extension plate; 8. Second combined plate; 9. Baffle; 10. First filter screen; 11. Second filter screen; 12. Gear ring; 13. Bearing seat; 14. Sleeve; 15. Gear; 16. Lead screw; 17. Connecting rod; 18. Clamping plate; 19. Groove; 20. Inclined part; 21. Through groove; 22. Slide groove; 23. Guide block; 24. Operating panel; 25. Self-locking caster wheel; 26. Extension block; 27. Screw; 28. Support shell; 29. ​​Guide rail; 30. Slider. Detailed Implementation

[0029] Please see Figure 1 , 2 3, 5, 6, 7, 8, 9, a centrifugal fan, comprising a base 1, a support plate 5 fixed to the top of the base 1, a volute 2 fixed to the top of the support plate 5, a motor 4 fixed to the surface of the volute 2, the motor 4 located on the back of the volute 2, a first combined plate 6 fixed to the air inlet on the front of the volute 2, an extension plate 7 fixed to the surface of the first combined plate 6, a second combined plate 8 fixed to the outer surface of the extension plate 7, a baffle 9 fixed to the inner wall of the extension plate 7, a first filter screen 10 slidably connected to the surface of the baffle 9, a second filter screen 11 provided on one side of the first filter screen 10, and a toothed ring 12 slidably connected to the surface of the extension plate 7. Four bearing seats 13 are fixed on the surface of the second combined plate 8. A sleeve 14 is fixed on the inner wall of the bearing seat 13. A lead screw 16 is threaded through the inner wall of the sleeve 14. A connecting rod 17 is fixed at the bottom of the lead screw 16. A clamping plate 18 is fixed at the bottom of the connecting rod 17. A groove 19 is opened on the surface of the clamping plate 18 to cooperate with the first filter screen 10 and the second filter screen 11. Four slots are opened on the surface of the second combined plate 8 to cooperate with the movement of the lead screw 16. Four through slots 21 are opened on the surface of the extension plate 7 to cooperate with the movement of the lead screw 16. A gear 15 is fixed on the surface of the sleeve 14. A gear ring 12 meshes with the surfaces of multiple gears 15.

[0030] When motor 4 starts, air begins to enter the volute 2. The air first contacts the surface of the second filter screen 11, and then passes through the first filter screen 10 before entering the volute 2. During operation, the surface of the first filter screen 10 is positioned on the surfaces of the baffle 9 and the groove 19, while the second filter screen 11 is positioned inside the groove 19, thus securing both screens. When the first and second filters need to be disassembled for cleaning, the gear ring 12 is rotated, causing multiple gears 15 to rotate together. This allows the lead screw 16 to be engaged with the threads on the inner wall of the sleeve 14. The effect is that the clamping plates 18 begin to move away from the second filter screen 11, so that the multiple clamping plates 18 can simultaneously release the restriction on the first filter screen 10 and the second filter screen 11. Then the operator can directly pull the second filter screen 11 and the first filter screen 10 outward, so that the first filter screen 10 and the second filter screen 11 can be quickly removed and cleaned, thereby shortening the maintenance time and allowing the staff to complete the cleaning or replacement of the filter screen in a short time, improving the overall work efficiency. Moreover, this design does not require a complicated disassembly and assembly process, and no tools are needed during the disassembly and assembly process, making the disassembly and assembly process simpler and more efficient.

[0031] Furthermore, two guide blocks 23 are fixed to the inner wall of the through groove 21, and two sliding grooves 22 are opened on the surface of the connecting rod 17, with the guide blocks 23 slidingly connected to the surface of the sliding grooves 22;

[0032] When the sleeve 14 rotates, the guide block 23 can limit the direction of the connecting rod 17 on the inner wall of the slide groove 22, thereby ensuring that the lead screw 16 can move up and down and preventing the sleeve 14 from driving the lead screw 16 to rotate together.

[0033] Furthermore, a guide rail 29 is fixed to the surface of the first combination plate 6, and multiple sliders 30 are slidably connected to the surface of the guide rail 29. The sliders 30 are fixedly connected to the surface of the toothed ring 12.

[0034] The guide rail 29 provides a fixed track along which the slider 30 slides, which helps to maintain the center position of the toothed ring 12, ensuring that the toothed ring 12 rotates more smoothly and accurately, reducing offset and wobbling, improving rotational accuracy, and preventing the toothed ring 12 from detaching from the surface of the extension plate 7.

[0035] Furthermore, multiple operating plates 24 are evenly distributed on the surface of the toothed ring 12, and the operating plates 24 are fixedly connected to the surface of the toothed ring 12.

[0036] By setting up the control panel 24, the operator can more easily move the gear ring 12, making the rotation of the gear ring 12 more convenient.

[0037] Furthermore, an inclined portion 20 is provided at the bottom edge of the groove 19;

[0038] When the surfaces of the first filter 10 and the second filter 11 come into contact with the inclined portion 20, the first filter 10 and the second filter 11 can more easily enter the interior of the groove 19 through the inclined portion 20 with its inclined surface.

[0039] Furthermore, a self-locking universal wheel 25 is fixed to the bottom of the base 1, and an extension block 26 is fixed to each of the four corners of the surface of the base 1. A screw 27 is threaded through the surface of the extension block 26, and a support shell 28 is fixed to the bottom of the screw 27.

[0040] The base 1 can be moved by the self-locking casters 25. After moving to the required working position, the casters 25 are locked. At this time, the four screws 27 can be rotated to drive the support shell 28 downward, so that the bottom of the support shell 28 contacts the ground. This can effectively increase the overall stability of the base 1, which is crucial to ensuring that the fan will not move or tilt due to external vibration during operation. At the same time, since the ground inside the mine may be uneven or even sloping, the base 1 can be kept level by adjusting the height of the four corner screws 27. Even on irregular ground, the fan can be kept running smoothly, avoiding performance degradation or equipment damage caused by tilting.

[0041] Furthermore, the pore size of the second filter screen 11 is larger than that of the first filter screen 10;

[0042] The large-aperture second filter 11 first intercepts larger particles of dust and debris. If these large particles directly enter the fan, they may cause serious wear or damage to the components. The small-aperture first filter 10 then captures smaller particles, ensuring that the air after preliminary filtration is further purified, reducing the number of tiny particles entering the fan system, reducing the efficiency drop caused by dust accumulation, and maintaining the fan's high operating efficiency.

[0043] Please see Figure 4 A centrifugal fan impeller includes: an impeller assembly 3 disposed inside a volute 2;

[0044] The impeller assembly 3 includes a rear disc 301, blades 302 and a front disc 303. The output shaft of the motor 4 passes through the volute 2 and is fixedly connected to the surface of the rear disc 301. There are multiple blades 302. The blades 302 are fixedly connected to the surface of the rear disc 301 and the front disc 303 is fixedly connected to the surface of the blades 302.

[0045] The rear disc 301, blades 302 and front disc 303 form the impeller assembly 3. When the motor 4 starts, it can drive the impeller assembly 3 to rotate, thereby realizing the normal delivery of airflow.

[0046] The rear disc 301, blade 302 and front disc 303 are all composed of a core layer, a wear-resistant layer and an anti-corrosion layer. The wear-resistant layer is located on the surface of the core layer and the anti-corrosion layer is located on the surface of the wear-resistant layer.

[0047] The core layer provides the impeller assembly 3 with the necessary mechanical strength and rigidity, ensuring its stability during high-speed rotation. The wear-resistant layer directly faces the dust and particulate matter carried in the mine air, which can effectively reduce the erosion of the impeller assembly 3 surface by these substances and extend the life of the impeller assembly 3. The anti-corrosion layer can resist the corrosion of metal surfaces by common corrosive gases and humid air in the mine environment, preventing oxidation and rust.

[0048] The core layer of the rear disc 301, blade 302 and front disc 303 is made of alloy steel, the wear-resistant layer is a ceramic coating, and the anti-corrosion layer is a Teflon coating.

[0049] Alloy steel has high strength and good rigidity, and can withstand large mechanical stress, ensuring the stability and safety of the impeller as a whole under high-speed rotation. The ceramic coating has extremely high hardness and good chemical stability, and can effectively resist wear caused by ore dust. In addition to excellent corrosion resistance, Teflon coating also has a low coefficient of friction and self-cleaning function, making it very suitable for use in environments containing particulate matter.

[0050] Working principle: First, the self-locking casters 25 are used for movement. After moving to the desired working position, the casters 25 are locked. Then, by rotating the four-sided screws 27, the bottom of the support shell 28 is brought into contact with the ground, which effectively increases the overall stability of the base 1. After that, the motor 4 can be started to begin working. When the first filter screen 10 and the second filter screen 11 need to be disassembled and cleaned, the gear ring 12 is rotated, causing the gear ring 12 to drive multiple gears 15 to rotate together. This allows the lead screw 16 to be affected by the threads on the inner wall of the sleeve 14, thus starting to drive the clamping plate 18. The filter moves away from the second filter 11, allowing the multiple clamps 18 to simultaneously release their restraints on the first filter 10 and the second filter 11. The operator can then directly pull the second filter 11 and the first filter 10 outwards, enabling rapid removal and cleaning of both filters. This shortens maintenance time, allowing staff to clean or replace the filters quickly, improving overall work efficiency. Furthermore, this design eliminates the need for complex disassembly and assembly processes, and requires no tools, making the process simpler and more efficient.

[0051] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A centrifugal fan, comprising a base (1), characterized in that: A support plate (5) is fixed to the top of the base (1), and a volute (2) is fixed to the top of the support plate (5). A motor (4) is fixed to the surface of the volute (2), and the motor (4) is located on the back of the volute (2). A first combined plate (6) is fixed to the air inlet on the front of the volute (2). An extension plate (7) is fixed to the surface of the first combined plate (6), and a second combined plate (8) is fixed to the outer surface of the extension plate (7). A baffle (9) is fixed to the inner wall of the extension plate (7), and a first filter screen (10) is slidably connected to the surface of the baffle (9). A second filter screen (11) is provided on one side of the first filter screen (10). A toothed ring (12) is slidably connected to the surface of the extension plate (7), and the second combined plate (8) is fixed to the surface of the extension plate (7). There are four bearing seats (13), and a sleeve (14) is fixed on the inner wall of the bearing seat (13). A lead screw (16) is threaded through the inner wall of the sleeve (14). A connecting rod (17) is fixed at the bottom of the lead screw (16). A clamping plate (18) is fixed at the bottom of the connecting rod (17). A groove (19) is opened on the surface of the clamping plate (18) to cooperate with the first filter screen (10) and the second filter screen (11). Four slots are opened on the surface of the second combination plate (8) to cooperate with the movement of the lead screw (16). Four through slots (21) are opened on the surface of the extension plate (7) to cooperate with the movement of the lead screw (16). A gear (15) is fixed on the surface of the sleeve (14). The gear ring (12) meshes with the surfaces of multiple gears (15).

2. A centrifugal fan according to claim 1, characterized in that: Two guide blocks (23) are fixed to the inner wall of the through groove (21), and two sliding grooves (22) are opened on the surface of the connecting rod (17). The guide blocks (23) are slidably connected to the surface of the sliding grooves (22).

3. A centrifugal fan according to claim 1, characterized in that: The first combination plate (6) has a guide rail (29) fixed on its surface. Multiple sliders (30) are slidably connected to the surface of the guide rail (29). The sliders (30) are fixedly connected to the surface of the toothed ring (12).

4. A centrifugal fan according to claim 1, characterized in that: The toothed ring (12) has a plurality of operating plates (24) evenly distributed on its surface, and the operating plates (24) are fixedly connected to the surface of the toothed ring (12).

5. A centrifugal fan according to claim 1, characterized in that: An inclined portion (20) is provided at the bottom edge of the groove (19).

6. A centrifugal fan according to claim 1, characterized in that: The base (1) is fixed with a self-locking universal wheel (25) at the bottom. The base (1) has extension blocks (26) fixed at each of the four corners. The extension blocks (26) have screws (27) threaded through their surfaces. The screws (27) have a support shell (28) fixed at the bottom.

7. A centrifugal fan according to claim 1, characterized in that: The surface pore size of the second filter screen (11) is larger than that of the first filter screen (10).

8. A centrifugal fan impeller, used in a centrifugal fan as described in claim 1, characterized in that, include: The impeller assembly (3) is located inside the volute (2); The impeller assembly (3) includes a rear disc body (301), blades (302) and a front disc body (303). The output shaft of the motor (4) passes through the volute (2) and is fixedly connected to the surface of the rear disc body (301). There are multiple blades (302). The blades (302) are fixedly connected to the surface of the rear disc body (301), and the front disc body (303) is fixedly connected to the surface of the blades (302).

9. A centrifugal fan impeller according to claim 8, characterized in that: The rear disc (301), blade (302) and front disc (303) are all composed of a core layer, a wear-resistant layer and an anti-corrosion layer. The wear-resistant layer is located on the surface of the core layer and the anti-corrosion layer is located on the surface of the wear-resistant layer.

10. A centrifugal fan impeller according to claim 9, characterized in that: The core layer of the rear disc (301), blade (302) and front disc (303) is made of alloy steel, the wear-resistant layer is a ceramic coating, and the anti-corrosion layer is a Teflon coating.

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