Energy-saving centrifugal fan

Abstract

The invention provides an energy-saving centrifugal fan, and relates to the field of centrifugal fans. The energy-saving centrifugal fan comprises a bottom plate, a mounting box and a machine box, one side of the upper surface of the bottom plate is fixedly connected with the mounting box through a plurality of bolts, the other side of the upper surface of the bottom plate is fixedly connected with a base through a plurality of bolts, the upper surface of the base is fixedly connected with the machine box, and a first servo motor is arranged on the inner bottom face of the mounting box; an output shaft of the first servo motor is fixedly connected with a driving rotating shaft, the upper end of the machine box is connected with an air outlet pipe in a penetrating mode, the other side of the outer wall of the air outlet pipe is fixedly connected with a connecting frame, and the front end of the inner wall of the machine box is fixedly connected with a plurality of supporting rods. According to the energy-saving centrifugal fan, the driven rotating shaft provided with the wind wheel, the supporting disc provided with the second bearing and the third bearing are used in cooperation, vibration generated when the wind wheel rotates is reduced to a certain extent, and energy consumption of the centrifugal fan is reduced.

Description

Technical Field

[0001] The invention relates to the field of centrifugal fans, in particular to an energy-saving centrifugal fan. Background Art

[0002] A centrifugal fan is a device that transfers power to gas through a rotating impeller, thereby increasing the pressure and speed of the gas and achieving gas transportation. Centrifugal fans are widely used in ventilation of buildings, transportation of industrial fuels and emission of chemical waste gas due to their simple structure, high efficiency and wide range of applications.

[0003] However, the wind wheel of the existing centrifugal fans on the market is mostly set up with one end cantilevered, which may cause greater vibration when the wind wheel rotates, thereby increasing the energy consumption of the centrifugal fan. In addition, most of the existing centrifugal fans on the market are not convenient for adjusting the air intake of the centrifugal fan, and a larger air volume may cause a larger pressure difference inside the centrifugal fan, thereby increasing the energy consumption of the centrifugal fan and reducing the efficiency of the centrifugal fan. Summary of the invention

[0004] 1. Technical issues to be resolved

[0005] In view of the deficiencies in the prior art, the present invention provides an energy-saving centrifugal fan, which solves the problem that the existing centrifugal fans use a wind wheel cantilevered at one end, thereby causing greater vibration when the wind wheel rotates, thereby increasing the energy consumption of the centrifugal fan. It also solves the problem that most existing centrifugal fans are not convenient for adjusting the air intake of the centrifugal fans, and a larger air volume may cause a larger pressure difference inside the centrifugal fan, thereby increasing the energy consumption of the centrifugal fan.

[0006] (II) Technical solution

[0007] To achieve the above objectives, the present invention is implemented through the following technical solutions: an energy-saving centrifugal fan comprises a base plate, an installation box and a chassis, one side of the upper surface of the base plate is fixedly connected to the installation box by a plurality of bolts, the other side of the upper surface of the base plate is fixedly connected to the base by a plurality of bolts, the upper surface of the base is fixedly connected to the chassis, a No. 1 servo motor is arranged on the inner bottom surface of the installation box, the output shaft of the No. 1 servo motor is fixedly connected to the active rotating shaft, the upper end of the chassis is through-connected with an air outlet pipe, the other side of the outer wall of the air outlet pipe is fixedly connected to a connecting frame, the front end of the inner wall of the chassis is fixedly connected to a plurality of support rods, the sides of the support rods close to the center of the chassis are fixedly connected to a support disk, the middle part of the outer wall of the rear end of the support disk is fixedly connected to a No. 2 bearing, the inner wall of the No. 2 bearing is fixedly connected to a driven rotating shaft, and the middle part of the outer wall of the driven rotating shaft shaft body is fixedly connected to a wind wheel;

[0008] An air inlet duct is fixedly connected to the middle part of the outer wall of the front end of the chassis, a mounting cavity is opened on one side of the upper part of the outer wall of the front end of the air inlet duct, a mounting groove is opened inside the upper end of the air inlet duct, a No. 2 servo motor is arranged on the inner bottom surface of the mounting cavity, an active rotating rod is fixedly connected to the output shaft of the No. 2 servo motor, a plurality of active bevel gears are fixedly connected to the outer wall of the active rotating rod body, a plurality of driven rotating rods are rotatably connected to the middle part of the inner bottom surface of the mounting groove, the upper ends of the driven rotating rods are fixedly connected to the driven bevel gears, and the middle part of the outer wall of the driven rotating rod body is fixedly connected to blades;

[0009] Through the above technical scheme, by using the No. 2 servo motor with an active rotating rod, the active bevel gear and the driven bevel gear with a driven rotating rod, it is convenient to adjust the rotation angle of the blade, and then adjust the air intake volume of the air inlet pipe, thereby avoiding the problem of a large pressure difference inside the centrifugal fan caused by a large air volume, and reducing the energy consumption of the centrifugal fan to a certain extent.

[0010] Preferably, mounting holes are provided at four corners of the upper surface of the bottom plate, and a No. 1 sealing plate is fixedly connected to the middle of the front end outer wall of the mounting box by a plurality of bolts;

[0011] Through the above technical solution, the installation holes make it easy for workers to install the base plate in the workplace, and the No. 1 sealing plate prevents external objects from contacting the electrical equipment inside the installation box.

[0012] Preferably, a No. 1 bearing is fixedly connected to the middle of the inner wall at the rear end of the installation box, and the inner wall of the No. 1 bearing is fixedly connected to the outer wall of the active shaft body;

[0013] Through the above technical solution, the stability of the active shaft rotation is improved through the No. 1 bearing, the vibration generated when the active shaft rotates is reduced, and thus the energy consumption is reduced.

[0014] Preferably, the rear end of the driving shaft passes through the installation box to the outside of the installation box and is fixedly connected to a driving pulley, the rear end of the driven shaft passes through the chassis to the outside of the chassis and is fixedly connected to a driven pulley, and the outer walls of the driven pulley and the driving pulley are both sleeved with a transmission belt;

[0015] Through the above technical solution, the active shaft provided with the active pulley is driven to rotate by the No. 1 servo motor, and the driven shaft provided with the driven pulley is rotated in cooperation with the transmission belt, thereby rotating the wind wheel.

[0016] Preferably, a No. 3 bearing is fixedly connected to the middle of the inner wall at the rear end of the chassis, and the inner wall of the No. 3 bearing is fixedly connected to the outer wall of the driven shaft body;

[0017] Through the above technical solution, the stability of the rotation of the driven shaft is improved through the No. 3 bearing, thereby reducing the vibration generated when the driven shaft rotates and reducing energy consumption.

[0018] Preferably, a No. 2 sealing plate is fixedly connected to the middle portion of the front end outer wall of the installation cavity by a plurality of bolts, and the installation groove is connected through the installation cavity;

[0019] Through the above technical solution, the second sealing plate is used to prevent foreign objects from contacting the electrical equipment inside the installation cavity.

[0020] Preferably, the other side of the active rotating rod is rotatably connected to the inner wall of the other side of the mounting groove;

[0021] Through the above technical solution, the active rotating rod provided with a plurality of active bevel gears is driven to rotate by the second servo motor.

[0022] Preferably, the driven bevel gear and the driving bevel gear are respectively meshed and connected, and the lower end of the driven rotating rod passes through the mounting groove to the inside of the air inlet pipe and is rotatably connected to the inner bottom surface of the air inlet pipe;

[0023] Through the above technical solution, the active bevel gear drives the driven bevel gear to rotate, and then the driven rotating rod drives the blades to rotate, thereby changing and adjusting the air intake volume of the air inlet pipe.

[0024] (III) Beneficial effects

[0025] The present invention provides an energy-saving centrifugal fan having the following beneficial effects:

[0026] 1. The present invention provides an energy-saving centrifugal fan, which reduces the vibration of the wind wheel during rotation to a certain extent and reduces the energy consumption of the centrifugal fan by using a driven rotating shaft provided with a wind wheel, a supporting plate provided with a second bearing and a third bearing in coordination.

[0027] 2. The present invention provides an energy-saving centrifugal fan, which facilitates the adjustment of the rotation angle of the blades and further adjusts the air intake volume of the air inlet pipe by using a No. 2 servo motor with an active rotating rod, an active bevel gear and a driven bevel gear with a driven rotating rod, thereby avoiding the problem of a large pressure difference inside the centrifugal fan caused by a large air volume and reducing the energy consumption of the centrifugal fan to a certain extent.

[0028] 3. The present invention provides an energy-saving centrifugal fan, which drives a driving shaft equipped with a driving pulley to rotate through a No. 1 servo motor, and is used in conjunction with a transmission belt to rotate a driven shaft equipped with a driven pulley, thereby rotating a wind wheel, thereby allowing the centrifugal fan to work normally. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1It is a schematic diagram of the main structure of the present invention from a first viewing angle;

[0030] Figure 2 is a schematic diagram of the main structure of the present invention from a second viewing angle;

[0031] Figure 3 An exploded view of the installation box, the first sealing plate and the first servo motor of the present invention;

[0032] Figure 4 It is a schematic axial section diagram of the installation box, the first servo motor, the driving shaft, the driving pulley and the first bearing of the present invention;

[0033] Figure 5 It is a schematic diagram of the structure of the base, chassis, air outlet pipe, connection frame and air inlet pipe of the present invention;

[0034] Figure 6 It is a partial exploded view of the base, chassis, air outlet pipe, connection frame and air inlet pipe of the present invention;

[0035] Figure 7 This is a schematic diagram of the axial cross-section structure of the base, chassis, and air outlet duct of the present invention from a first viewing angle;

[0036] Figure 8 This is a schematic diagram of the axial cross-section structure of the base, chassis, and air outlet duct from a second viewing angle of the present invention;

[0037] Fig. 9 for Figure 7 The enlarged view of point A in the middle;

[0038] Fig.10 for Figure 8 The enlarged view of point B in the middle;

[0039] Fig.11 for Figure 5 Enlarged view of point C in the middle;

[0040] Fig.12 for Figure 6 Enlarged view of point D in the middle.

[0041] Among them, 1. bottom plate; 2. installation box; 3. base; 4. installation hole; 5. No. 1 sealing plate; 6. No. 1 servo motor; 7. active shaft; 8. active pulley; 9. chassis; 10. air outlet duct; 11. connection frame; 12. support rod; 13. support plate; 14. No. 2 bearing; 15. driven shaft; 16. wind wheel; 17. No. 3 bearing; 18. driven pulley; 19. transmission belt; 20. air inlet duct; 21. installation cavity; 22. No. 2 sealing plate; 23. installation slot; 24. No. 2 servo motor; 25. active rotating rod; 26. active bevel gear; 27. driven rotating rod; 28. driven bevel gear; 29. ​​blade; 30. No. 1 bearing. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0043] like Figure 1-12 As shown, an embodiment of the present invention provides an energy-saving centrifugal fan, including a base plate 1, an installation box 2 and a chassis 9, one side of the upper surface of the base plate 1 is fixedly connected to the installation box 2 by a plurality of bolts, the other side of the upper surface of the base plate 1 is fixedly connected to a base 3 by a plurality of bolts, the upper surface of the base 3 is fixedly connected to the chassis 9, a No. 1 servo motor 6 is arranged on the inner bottom surface of the installation box 2, the output shaft of the No. 1 servo motor 6 is fixedly connected to a driving shaft 7, an air outlet duct 10 is connected through the upper end of the chassis 9, a connecting frame 11 is fixedly connected to the other side of the outer wall of the air outlet duct 10, a plurality of support rods 12 are fixedly connected to the front end of the inner wall of the chassis 9, a support plate 13 is fixedly connected to one side of the support rods 12 close to the center of the chassis 9, a No. 2 bearing 14 is fixedly connected to the middle part of the outer wall of the rear end of the support plate 13, a driven shaft 15 is fixedly connected to the inner wall of the No. 2 bearing 14, a wind wheel 16 is fixedly connected to the middle part of the outer wall of the driven shaft 15;

[0044] An air inlet pipe 20 is fixedly connected to the middle of the front end outer wall of the chassis 9, a mounting cavity 21 is opened on one side of the upper part of the front end outer wall of the air inlet pipe 20, a mounting groove 23 is opened inside the upper end of the air inlet pipe 20, a No. 2 servo motor 24 is arranged on the inner bottom surface of the mounting cavity 21, an active rotating rod 25 is fixedly connected to the output shaft of the No. 2 servo motor 24, a plurality of active bevel gears 26 are fixedly connected to the outer wall of the rod body of the active rotating rod 25, a plurality of driven rotating rods 27 are rotatably connected to the middle part of the inner bottom surface of the mounting groove 23, the upper ends of the driven rotating rods 27 are all fixedly connected to driven bevel gears 28, and the middle part of the outer wall of the rod body of the driven rotating rod 27 is fixedly connected to blades 29;

[0045] The active shaft 7 provided with the active pulley 8 is driven to rotate by the first servo motor 6, and the driven shaft 15 provided with the driven pulley 18 is rotated in cooperation with the transmission belt 19, so that the wind wheel 16 is rotated, so that the centrifugal fan can work normally.

[0046] The four corners of the upper surface of the bottom plate 1 are provided with mounting holes 4, and the middle of the front end outer wall of the mounting box 2 is fixedly connected to a No. 1 sealing plate 5 by a plurality of bolts;

[0047] The installation hole 4 facilitates the worker to install the base plate 1 in the workplace, and the No. 1 sealing plate 5 prevents external objects from contacting the electrical equipment inside the installation box 2.

[0048] A No. 1 bearing 30 is fixedly connected to the middle of the inner wall at the rear end of the mounting box 2, and the inner wall of the No. 1 bearing 30 is fixedly connected to the outer wall of the shaft body of the active rotating shaft 7;

[0049] The first bearing 30 is used to improve the rotation stability of the active shaft 7, reduce the vibration generated when the active shaft 7 rotates, and thus reduce energy consumption.

[0050] The rear end of the driving shaft 7 passes through the installation box 2 to the outside of the installation box 2 and is fixedly connected to the driving pulley 8. The rear end of the driven shaft 15 passes through the chassis 9 to the outside of the chassis 9 and is fixedly connected to the driven pulley 18. The outer walls of the driven pulley 18 and the driving pulley 8 are both sleeved with a transmission belt 19.

[0051] The driving shaft 7 provided with a driving pulley 8 is driven to rotate by the first servo motor 6, and the driven shaft 15 provided with a driven pulley 18 is rotated in cooperation with the transmission belt 19, thereby rotating the wind wheel 16.

[0052] A third bearing 17 is fixedly connected to the middle of the inner wall at the rear end of the chassis 9, and the inner wall of the third bearing 17 is fixedly connected to the outer wall of the shaft body of the driven rotating shaft 15;

[0053] The third bearing 17 improves the rotation stability of the driven shaft 15, thereby reducing the vibration generated when the driven shaft 15 rotates and reducing energy consumption.

[0054] A second sealing plate 22 is fixedly connected to the middle of the front end outer wall of the installation cavity 21 by multiple bolts, and the installation groove 23 is connected to the installation cavity 21 through the installation cavity 21;

[0055] The second sealing plate 22 prevents foreign objects from contacting the electrical equipment inside the installation cavity 21 .

[0056] The other side of the active rotating rod 25 is rotatably connected to the inner wall of the other side of the mounting groove 23;

[0057] The active rotating rod 25 provided with a plurality of active bevel gears 26 is driven to rotate by the second servo motor 24 .

[0058] The driven bevel gear 28 and the driving bevel gear 26 are meshed and connected respectively, and the lower end of the driven rotating rod 27 passes through the mounting groove 23 to the inside of the air inlet pipe 20 and is rotatably connected to the inner bottom surface of the air inlet pipe 20;

[0059] The active bevel gear 26 drives the driven bevel gear 28 to rotate, and then the driven rotating rod 27 drives the blades 29 to rotate, so as to change and adjust the air intake volume of the air intake pipe 20.

[0060] Working principle: When using the energy-saving centrifugal fan, first, the active rotating shaft 7 provided with a driving pulley 8 is driven to rotate by the No. 1 servo motor 6, and the driven rotating shaft 15 provided with a driven pulley 18 is rotated in cooperation with the transmission belt 19, thereby rotating the wind wheel 16. Secondly, the active rotating rod 25 provided with multiple active bevel gears 26 is driven to rotate by the No. 2 servo motor 24. Finally, the driven bevel gear 28 is driven to rotate by the active bevel gear 26, thereby causing the driven rotating rod 27 to drive the blades 29 to rotate, thereby changing and adjusting the air intake of the air inlet pipe 20.

[0061] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An energy-saving centrifugal fan, comprising a base plate (1), a mounting box (2) and a chassis (9), characterized in that: One side of the upper surface of the bottom plate (1) is fixedly connected to the installation box (2) by a plurality of bolts, the other side of the upper surface of the bottom plate (1) is fixedly connected to a base (3) by a plurality of bolts, the upper surface of the base (3) is fixedly connected to the chassis (9), a No. 1 servo motor (6) is arranged on the inner bottom surface of the installation box (2), the output shaft of the No. 1 servo motor (6) is fixedly connected to the driving shaft (7), the upper end of the chassis (9) is connected to an air outlet pipe (10), and the air outlet pipe (10) ) is fixedly connected to a connection frame (11) on the other side of the outer wall, a plurality of support rods (12) are fixedly connected to the front end of the inner wall of the chassis (9), a support plate (13) is fixedly connected to one side of the support rods (12) close to the center of the chassis (9), a No. 2 bearing (14) is fixedly connected to the middle of the outer wall of the rear end of the support plate (13), a driven shaft (15) is fixedly connected to the inner wall of the No. 2 bearing (14), and a wind wheel (16) is fixedly connected to the middle of the outer wall of the driven shaft (15); An air inlet pipe (20) is fixedly connected to the middle of the front end outer wall of the chassis (9), a mounting cavity (21) is provided on one side of the upper part of the front end outer wall of the air inlet pipe (20), a mounting groove (23) is provided inside the upper end of the air inlet pipe (20), a second servo motor (24) is arranged on the inner bottom surface of the mounting cavity (21), an active rotating rod (25) is fixedly connected to the output shaft of the second servo motor (24), a plurality of active bevel gears (26) are fixedly connected to the outer wall of the rod body of the active rotating rod (25), a plurality of driven rotating rods (27) are rotatably connected to the middle of the inner bottom surface of the mounting groove (23), the upper ends of the driven rotating rods (27) are fixedly connected to driven bevel gears (28), and the middle parts of the outer walls of the rod bodies of the driven rotating rods (27) are fixedly connected to blades (29).

2. An energy-saving centrifugal fan according to claim 1, characterized in that: The four corners of the upper surface of the bottom plate (1) are provided with mounting holes (4), and the middle portion of the front end outer wall of the mounting box (2) is fixedly connected to a No. 1 sealing plate (5) by means of a plurality of bolts.

3. The energy-saving centrifugal fan according to claim 1, characterized in that: A No. 1 bearing (30) is fixedly connected to the middle of the inner wall at the rear end of the installation box (2), and the inner wall of the No. 1 bearing (30) is fixedly connected to the outer wall of the shaft body of the active rotating shaft (7).

4. The energy-saving centrifugal fan according to claim 1, characterized in that: The rear end of the driving rotating shaft (7) passes through the installation box (2) to the outside of the installation box (2) and is fixedly connected to a driving pulley (8); the rear end of the driven rotating shaft (15) passes through the chassis (9) to the outside of the chassis (9) and is fixedly connected to a driven pulley (18); and the outer walls of the driven pulley (18) and the driving pulley (8) are both sleeved with a transmission belt (19).

5. The energy-saving centrifugal fan according to claim 1, characterized in that: A third bearing (17) is fixedly connected to the middle of the inner wall at the rear end of the chassis (9), and the inner wall of the third bearing (17) is fixedly connected to the outer wall of the shaft body of the driven rotating shaft (15).

6. The energy-saving centrifugal fan according to claim 1, characterized in that: A second sealing plate (22) is fixedly connected to the middle portion of the front end outer wall of the installation cavity (21) via a plurality of bolts, and the installation groove (23) is connected in a through-connection manner to the installation cavity (21).

7. The energy-saving centrifugal fan according to claim 1, characterized in that: The other side of the active rotating rod (25) is rotatably connected to the inner wall of the other side of the mounting groove (23).

8. The energy-saving centrifugal fan according to claim 1, characterized in that: The driven bevel gear (28) and the driving bevel gear (26) are respectively meshed and connected, and the lower end of the driven rotating rod (27) passes through the mounting groove (23) to the inside of the air inlet pipe (20) and is rotatably connected to the inner bottom surface of the air inlet pipe (20).

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