Low-noise centrifugal fan for circular pipeline

Abstract

The utility model relates to the technical field of centrifugal fans, and discloses a low-noise centrifugal fan for a circular pipeline, which solves the problem that better practicability is inconvenient to achieve due to the fact that the low-noise effect is inconvenient to achieve in the using process of the centrifugal fan, and comprises a supporting frame, and an adjusting supporting assembly is arranged at the bottom end in the supporting frame. A movable supporting plate is fixedly mounted at the top of the adjusting supporting assembly, a rubber damping pad is fixedly mounted at the top of the movable supporting plate, a supporting seat is fixedly mounted at the top of the rubber damping pad, and a centrifugal fan body is fixedly mounted in the supporting seat and comprises a circular main cylinder; the circular main barrel is fixedly mounted in the supporting seat, silencing holes are formed in the barrel wall of the circular main barrel, and the outer side of the circular main barrel is wrapped with silencing cotton; according to the low-noise centrifugal fan, the low-noise effect can be conveniently achieved in the using process of the centrifugal fan, and therefore better practicability can be conveniently achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of centrifugal fans, and particularly relates to a centrifugal fan for circular pipelines with low noise. Background Technique

[0002] A centrifugal fan is a machine that relies on the input mechanical energy to increase the gas pressure and discharge the gas. It is a driven fluid machine. Centrifugal fans are widely used in ventilation, dust removal and cooling in factories, mines, tunnels, cooling towers, vehicles, ships and buildings, ventilation and induced draft in boilers and industrial furnaces, cooling and ventilation in air conditioning equipment and household electrical appliances, drying and selection of grains, air source in wind tunnels and inflation and propulsion of hovercrafts, etc. However, during the use of centrifugal fans, it is not easy to achieve the effect of low noise, thus it is not easy to achieve better practicability. Content of the Utility Model

[0003] In view of the above situation, in order to overcome the defects of the prior art, the utility model provides a centrifugal fan for circular pipelines with low noise, effectively solving the problem that during the use of centrifugal fans, it is not easy to achieve the effect of low noise, thus it is not easy to achieve better practicability.

[0004] To achieve the above object, the utility model provides the following technical solution: A centrifugal fan for circular pipelines with low noise, including a support frame. Uniformly penetrating fixing holes are provided on the outer side of the bottom end of the support frame. An adjustable support assembly is arranged at the bottom end inside the support frame. An activity support plate is fixedly installed at the top of the adjustable support assembly. A rubber shock pad is fixedly installed at the top of the activity support plate. A support seat is fixedly installed at the top of the rubber shock pad. And a centrifugal fan body is fixedly installed inside the support seat. The centrifugal fan body includes a circular main cylinder, and the circular main cylinder is fixedly installed inside the support seat. Sound-absorbing holes are provided inside the wall of the circular main cylinder. The outside of the circular main cylinder is wrapped with sound-absorbing cotton. An air inlet pipe port is installed at one end of the circular main cylinder. An air outlet pipe port is fixedly installed at the other end of the circular main cylinder. A machine cylinder is fixedly installed inside the circular main cylinder. A fan motor is fixedly installed inside the machine cylinder. An impeller is fixedly installed on the output shaft of the fan motor. A front guide vane is installed on the side of the impeller away from the fan motor and inside the circular main cylinder. A rear guide vane is installed outside the machine cylinder and inside the circular main cylinder.

[0005] Preferably, the adjusting and supporting assembly includes a strip-shaped bottom plate fixedly installed in the middle of the inner bottom end of the supporting frame. Symmetrically fixed on the top of the strip-shaped bottom plate are positioning frames. A shaft rod is rotatably installed inside the positioning frames, and both ends of the shaft rod extend to the outside of the positioning frames. Inside the positioning frames and on the outer side of the shaft rod is fixedly installed a transmission gear. Meshed with the top of the transmission gear is a transmission rack. Fixedly installed on the top of the transmission rack is a movable sleeve. Fixedly installed on the top of the movable sleeve is a first connecting shaft. An adjustable support rod is rotatably installed on the first connecting shaft. One end of the adjustable support rod away from the first connecting shaft is rotatably installed with a second connecting shaft, and the two second connecting shafts are symmetrically and fixedly installed at the bottom of the movable support plate. Symmetrically fixed on the top of the strip-shaped bottom plate are positioning blocks. A driving rod is rotatably installed between the two positioning blocks. Fixedly installed on one side of one of the positioning blocks is a driving motor, and the output shaft of the driving motor movably penetrates through the positioning block and is fixedly connected to one end of the driving rod. Symmetrically fixed on the outer side of the driving rod are two first bevel gears. Meshed with the outer sides of the first bevel gears are second bevel gears, and the two second bevel gears are respectively fixedly installed at one ends of the two shaft rods.

[0006] Preferably, symmetrically fixed on the top of the strip-shaped bottom plate are positioning plates. Between the tops of the two positioning plates is fixedly installed a positioning slide rod. The two movable sleeves are symmetrically slidably installed on the outer side of the positioning slide rod. Symmetrically fixed on the outer side of the positioning slide rod are retaining rings, and the two retaining rings are located between the two movable sleeves. Symmetrically fixed inside the movable sleeves are first positioning sliders. Symmetrically formed on the outer side of the positioning slide rod are first positioning chutes, and the first positioning sliders are slidably installed inside the first positioning chutes.

[0007] Preferably, symmetrically fixed on the outer side of the movable support plate are second positioning sliders. Symmetrically penetrated through the two side parts of the supporting frame are second positioning chutes, and the second positioning sliders are slidably penetrated and installed inside the second positioning chutes.

[0008] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0009] 1) During operation, through the interaction of the circular main cylinder body, the air inlet duct opening, the air outlet duct opening, the machine barrel, the fan motor, the impeller, the front deflector, the rear deflector, the sound-absorbing holes, and the sound-absorbing cotton, the centrifugal fan can achieve a low-noise effect during use, thus facilitating better practicality.

[0010] 2) During operation, through the interaction of the supporting frame, the fixedly installed holes, the adjusting and supporting assembly, the movable support plate, the rubber shock pads, the support seats, and the centrifugal fan body, the height of the centrifugal fan can be adjusted during installation, thus facilitating better operation by the staff. Description of the Drawings

[0011] The accompanying drawings are used to provide a further understanding of the present utility model and constitute a part of the specification. Together with the embodiments of the present utility model, they are used to explain the present utility model and do not constitute a limitation to the present utility model.

[0012] In the accompanying drawings:

[0013] Figure 1 is a schematic structural diagram of a centrifugal fan for a low-noise circular duct of the present utility model;

[0014] Figure 2 is a schematic structural diagram of the centrifugal fan body of the present utility model;

[0015] Figure 3 is a partially enlarged schematic structural diagram of the movable support plate of the present utility model;

[0016] Figure 4 is a schematic structural diagram of the adjusting support assembly of the present utility model;

[0017] Figure 5 is a partially enlarged schematic structural diagram of the positioning frame of the present utility model;

[0018] Figure 6 is a schematic internal structure diagram of the movable sleeve of the present utility model.

[0019] In the figure: 1, support frame; 2, fixed installation hole; 3, adjusting support assembly; 4, movable support plate; 5, rubber shock pad; 6, support seat; 7, centrifugal fan body; 8, circular main cylinder; 9, sound absorption hole; 10, sound absorption cotton; 11, air inlet duct opening; 12, air outlet duct opening; 13, machine barrel; 14, fan motor; 15, impeller; 16, front guide vane; 17, rear guide vane; 18, strip-shaped bottom plate; 19, positioning frame; 20, shaft rod; 21, transmission gear; 22, transmission rack; 23, movable sleeve; 24, first connecting shaft; 25, movable support rod; 26, second connecting shaft; 27, positioning block; 28, driving rod; 29, first bevel gear; 30, second bevel gear; 31, positioning plate; 32, positioning slide bar; 33, retaining ring; 34, first positioning slider; 35, first positioning chute; 36, second positioning slider; 37, second positioning chute; 38, driving motor. Detailed implementation manners

[0020] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments; based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

[0021] Embodiment 1, which is given by Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 , the utility model includes a support frame 1. Uniformly through holes for fixed installation 2 are provided on the outer side of the bottom end of the support frame 1. An adjustable support assembly 3 is arranged at the inner bottom end of the support frame 1. A movable support plate 4 is fixedly installed at the top of the adjustable support assembly 3. Second positioning sliders 36 are symmetrically and fixedly installed on the outer side of the movable support plate 4. Second positioning chutes 37 are symmetrically and throughly provided in the two side parts of the support frame 1. And the second positioning sliders 36 are slidably installed through the inside of the second positioning chutes 37. A rubber shock pad 5 is fixedly installed at the top of the movable support plate 4. A support seat 6 is fixedly installed at the top of the rubber shock pad 5. And a centrifugal fan body 7 is fixedly installed inside the support seat 6;

[0022] The centrifugal fan body 7 includes a circular main cylinder 8, and the circular main cylinder 8 is fixedly installed inside the support seat 6. Sound-absorbing holes 9 are provided inside the cylinder wall of the circular main cylinder 8. The outer side of the circular main cylinder 8 is wrapped with sound-absorbing cotton 10. An air inlet pipe opening 11 is installed at one end of the circular main cylinder 8. An air outlet pipe opening 12 is fixedly installed at the other end of the circular main cylinder 8. A machine cylinder 13 is fixedly installed inside the circular main cylinder 8. A fan motor 14 is fixedly installed inside the machine cylinder 13. An impeller 15 is fixedly installed on the output shaft of the fan motor 14. A front guide vane 16 is installed on the side of the impeller 15 away from the fan motor 14 and inside the circular main cylinder 8. A rear guide vane 17 is installed outside the machine cylinder 13 and inside the circular main cylinder 8;

[0023] The adjusting support assembly 3 includes a strip-shaped bottom plate 18, and the strip-shaped bottom plate 18 is fixedly installed at the middle of the inner bottom end of the support frame 1. Symmetrically fixed on the top of the strip-shaped bottom plate 18 are positioning frames 19. Rotatably installed inside the positioning frames 19 are shaft rods 20, and both ends of the shaft rods 20 extend to the outside of the positioning frames 19. Fixedly installed inside the positioning frames 19 and on the outer side of the shaft rods 20 are transmission gears 21. Meshed with the top of the transmission gears 21 are transmission racks 22. Fixedly installed on the top of the transmission racks 22 are movable sleeves 23. Symmetrically fixed on the top of the strip-shaped bottom plate 18 are positioning plates 31. Fixedly installed between the tops of the two positioning plates 31 is a positioning slide rod 32, and the two movable sleeves 23 are symmetrically slidably installed on the outer side of the positioning slide rod 32. Symmetrically fixed on the outer side of the positioning slide rod 32 are retaining rings 33, and the two retaining rings 33 are located between the two movable sleeves 23. Symmetrically fixed inside the movable sleeves 23 are first positioning sliders 34. Symmetrically formed on the outer side of the positioning slide rod 32 are first positioning chutes 35, and the first positioning sliders 34 are slidably installed inside the first positioning chutes 35. Fixedly installed on the top of the movable sleeve 23 is a first connecting shaft 24. Rotatably installed on the first connecting shaft 24 is a movable support rod 25. Rotatably installed at the end of the movable support rod 25 away from the first connecting shaft 24 is a second connecting shaft 26, and the two second connecting shafts 26 are symmetrically fixed to the bottom of the movable support plate 4. Symmetrically fixed on the top of the strip-shaped bottom plate 18 are positioning blocks 27. Rotatably installed between the two positioning blocks 27 is a driving rod 28. Fixed to one side of one of the positioning blocks 27 is a driving motor 38, and the output shaft of the driving motor 38 movably penetrates through the positioning block 27 and is fixedly connected to one end of the driving rod 28. Symmetrically fixed on the outer side of the driving rod 28 are two first bevel gears 29. Meshed with the outer sides of the first bevel gears 29 are second bevel gears 30, and the two second bevel gears 30 are respectively fixed to one ends of the two shaft rods 20.

[0024] During use, through the interaction of the circular main cylinder 8, the air inlet duct opening 11, the air outlet duct opening 12, the cylinder 13, the fan motor 14, the impeller 15, the front guide plate 16, the rear guide plate 17, the sound-absorbing holes 9 and the sound-absorbing cotton 10, the centrifugal fan can achieve a low-noise effect during use, thus facilitating better practicality. And through the interaction of the support frame 1, the fixedly installed holes 2, the adjusting support assembly 3, the movable support plate 4, the rubber shock pads 5, the support base 6 and the centrifugal fan body 7, the centrifugal fan can be easily adjusted in height during installation, thus facilitating better operation by the staff.

[0025] Working principle: During operation, the fan motor 14 drives the impeller 15 to rotate, introducing air from the air inlet duct opening 11 and then sending it out from the air outlet duct opening 12. By using a backward-curved arc-shaped blade installed on the wheel to form the impeller 15, the included angle between the airflow direction and the linear velocity direction of the blade can be an obtuse angle, and the centerlines of the impeller 15, the barrel 13, and the circular main barrel 8 are coaxial, thus effectively improving the air supply efficiency and reducing noise. At the same time, since sound-absorbing holes 9 are provided inside the barrel wall of the circular main barrel 8 and cooperate with the mutual action of the sound-absorbing cotton 10, the noise can be further reduced. In this way, during the use of the centrifugal fan, it is easy to achieve the effect of low noise, and thus it is easy to achieve better practicality;

[0026] In addition, during the installation operation, start the drive motor 38 to drive the drive rod 28 to rotate. The drive rod 28 drives the first bevel gear 29 to rotate. The first bevel gear 29 drives the second bevel gear 30 to rotate. The second bevel gear 30 drives the shaft rod 20 to rotate. The shaft rod 20 drives the transmission gear 21 to rotate. The transmission gear 21 drives the transmission rack 22 to move. The transmission rack 22 drives the movable sleeve 23 to slide on the outside of the positioning slide rod 32. The movable sleeve 23 drives the first positioning slider 34 to slide inside the first positioning chute 35, which can ensure better stability when the movable sleeve 23 moves and also ensure better stability when the transmission rack 22 moves. At the same time, the movable sleeve 23 drives the first connecting shaft 24 to move. The first connecting shaft 24 drives the movable support rod 25 to move. The movable support rod 25 pushes the movable support plate 4 upward through the second connecting shaft 26. The movable support plate 4 drives the second positioning slider 36 to slide inside the second positioning chute 37, which can ensure better stability when the movable support plate 4 moves. At the same time, the movable support plate 4 pushes the support seat 6 upward through the rubber shock pad 5. The support seat 6 drives the centrifugal fan body 7 upward. After the centrifugal fan body 7 is lifted to the required height, stop the drive motor 38. In this way, during the installation of the centrifugal fan, it is easy to adjust the height, so that the staff can operate better.

Claims

1. A low-noise centrifugal fan for a circular duct, comprising a support frame (1), characterized in that: The outer side of the bottom end of the support frame (1) is evenly penetrated with fixed installation holes (2), the inner bottom end of the support frame (1) is provided with an adjustable support assembly (3), the top of the adjustable support assembly (3) is fixedly installed with a movable support plate (4), the top of the movable support plate (4) is fixedly installed with a rubber shock-absorbing pad (5), the top of the rubber shock-absorbing pad (5) is fixedly installed with a support seat (6), and the inside of the support seat (6) is fixedly installed with a centrifugal fan body (7), the centrifugal fan body (7) includes a circular main cylinder (8), and the circular main cylinder (8) is fixedly installed inside the support seat (6), and a sound-absorbing hole (9) is opened inside the cylinder wall of the circular main cylinder (8), and the circular The outer side of the main cylinder (8) is wrapped with silencer cotton (10), one end of the circular main cylinder (8) is provided with an air inlet duct opening (11), the other end of the circular main cylinder (8) is fixedly provided with an air outlet duct opening (12), a cylinder (13) is fixedly provided inside the circular main cylinder (8), a fan motor (14) is fixedly provided inside the cylinder (13), an impeller (15) is fixedly provided on the output shaft of the fan motor (14), a front guide plate (16) is provided on the side of the impeller (15) away from the fan motor (14) and located inside the circular main cylinder (8), and a rear guide plate (17) is provided on the outer side of the cylinder (13) and located inside the circular main cylinder (8).

2. A low-noise centrifugal fan for circular duct according to claim 1, characterized in that: The adjustable support assembly (3) comprises a strip bottom plate (18), and the strip bottom plate (18) is fixedly installed at the middle of the inner bottom end of the support frame (1), a positioning frame (19) is symmetrically fixedly installed on the top of the strip bottom plate (18), a shaft (20) is rotatably installed inside the positioning frame (19), and both ends of the shaft (20) extend to the outside of the positioning frame (19), a transmission gear (21) is fixedly installed inside the positioning frame (19) and outside the shaft (20), the top of the transmission gear (21) is meshedly connected with a transmission rack (22), the top of the transmission rack (22) is fixedly installed with a movable sleeve (23), the top of the movable sleeve (23) is fixedly installed with a first connecting shaft (24), a movable support rod (25) is rotatably installed on the first connecting shaft (24), and the movable support rod (25) is away from A second connecting shaft (26) is rotatably mounted on one end of the first connecting shaft (24), and the two second connecting shafts (26) are symmetrically fixedly mounted on the bottom of the movable support plate (4); a positioning block (27) is symmetrically fixedly mounted on the top of the strip bottom plate (18); a driving rod (28) is rotatably mounted between the two positioning blocks (27); a driving motor (38) is fixedly mounted on one side of one of the positioning blocks (27), and an output shaft of the driving motor (38) movably passes through the positioning block (27) and is fixedly connected to one end of the driving rod (28); two first bevel gears (29) are symmetrically fixedly mounted on the outer side of the driving rod (28); the outer side of the first bevel gear (29) is meshingly connected with a second bevel gear (30), and the two second bevel gears (30) are respectively fixedly mounted on one end of the two shafts (20).

3. A low-noise centrifugal fan for circular duct according to claim 2, characterized in that: A positioning plate (31) is symmetrically fixedly installed on the top of the strip bottom plate (18), a positioning slide bar (32) is fixedly installed between the top ends of the two positioning plates (31), and two movable sleeves (23) are symmetrically slidably installed on the outside of the positioning slide bar (32), a retaining ring (33) is symmetrically fixedly installed on the outside of the positioning slide bar (32), and the two retaining rings (33) are located between the two movable sleeves (23), a first positioning slide block (34) is symmetrically fixedly installed inside the movable sleeve (23), a first positioning slot (35) is symmetrically opened on the outside of the positioning slide bar (32), and the first positioning slide block (34) is slidably installed inside the first positioning slot (35).

4. A low-noise centrifugal fan for circular duct according to claim 1, characterized in that: A second positioning slide block (36) is symmetrically fixedly installed on the outer side of the movable support plate (4), and second positioning slide grooves (37) are symmetrically opened and penetrated inside the two side edges of the support frame (1), and the second positioning slide block (36) is slidably installed inside the second positioning slide groove (37).

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