Centrifugal fan with adjustable blades

Abstract

The utility model relates to the field of centrifugal fans, in particular to a blade-adjustable centrifugal fan which comprises a machine shell, an air outlet pipe fixedly communicates with the outer surface of the machine shell, a motor is fixedly connected to the back face of the machine shell, a connecting shaft is rotationally connected to the back face of the machine shell through a bearing, and the rear end of the connecting shaft is fixedly connected with the output end of the motor. And the front end of the connecting shaft is fixedly connected with a connecting cylinder. The motor is arranged to provide power for the connecting shaft, so that the connecting shaft can drive the connecting cylinder to rotate, the connecting cylinder enables the blades to rotate through cooperation of the threaded adjusting ring and the connecting piece, then wind power can be exhausted through the air outlet pipe, the positions of the blades can be adjusted through sliding connection of the blades and the connecting piece, and therefore the wind power generation efficiency is improved. Meanwhile, the bolt and the nut can ensure that the stability of the blade is kept after adjustment, the blade is prevented from loosening, the length of the blade during operation can be adjusted by matching with the connecting piece, and the air outlet amount of equipment can be controlled.

Description

Technical Field

[0001] The utility model relates to the technical field of centrifugal fans, in particular to a centrifugal fan with adjustable blades. Background Art

[0002] A centrifugal fan is a fluid machine that converts mechanical energy into gas pressure energy and is used to transport gas. A centrifugal fan consists of two parts: a casing and a centrifugal impeller. It has the characteristics of large air volume, stable performance and smooth rotation. It is widely used in ventilation, dust removal and cooling of chemical industry, metallurgy, electric power, factories, mines, tunnels, cooling towers, vehicles, ships and buildings; ventilation and draft of boilers and industrial furnaces.

[0003] After searching, a centrifugal fan with adjustable blades disclosed in a Chinese patent with publication number CN220248389U includes a mounting platform, a support column is fixedly installed on the top of the mounting platform, a body is fixedly installed on the left side of the top of the support column, an air inlet is arranged on the outside of the body, a connecting shaft is arranged in the middle part of the inner cavity of the body, a mounting cylinder is fixedly installed on the surface of the connecting shaft, a thread groove is provided on the surface of the mounting cylinder, and a screw is connected to the inner side of the thread groove and extends to the outer side of the mounting cylinder. The centrifugal fan with adjustable blades is convenient for users to install and fix the body and the drive motor through the setting of the support column, convenient for users to install and fix the mounting cylinder through the setting of the connecting shaft, convenient for users to install the screw and the fan blades through the opening of the thread groove, and convenient for users to adjust the horizontal direction of the fan blades through the threaded installation method. The technical key points are: adjusting the horizontal direction of the blades through the threaded rod and the threaded groove, increasing the horizontal direction of the blades.

[0004] The above solution solves the problem that the horizontal direction of the blades is difficult to adjust. However, during operation, the above solution is not convenient for adjusting the length of the blades, which makes it difficult to adjust the air volume of the fan during use.

[0005] Therefore, a new solution needs to be proposed to solve this problem. Utility Model Content

[0006] In view of the above background technology, the prior art has the disadvantage that it is inconvenient to adjust the length of the blades, resulting in the difficulty in adjusting the air volume of the fan during use.

[0007] The utility model discloses a centrifugal fan with adjustable blades, comprising a casing, an outer surface of which is fixedly connected to an air outlet pipe, a back side of the casing is fixedly connected to a motor, the back side of the casing is rotatably connected to a connecting shaft through a bearing, a rear end of the connecting shaft is fixedly connected to an output end of the motor, a front end of the connecting shaft is fixedly connected to a connecting cylinder, a group of adjusting grooves arranged at equal distances are opened on the outer surface of the connecting cylinder, an inner wall of each adjusting groove is slidably connected with a connecting piece, a blade is slidably connected to the outer surface of each connecting piece, a group of blades and an outer surface of the connecting piece are opened with a group of through holes, a group of blades are respectively fixedly installed with a group of blades through a group of bolts and a group of nuts, a group of connecting pieces are fixedly connected to a threaded adjusting ring on one side close to each other, a threaded rod is rotatably connected to the front side of the connecting cylinder through a bearing, a rear end of the threaded rod extends to the interior of the threaded adjusting ring, the threaded adjusting ring is threadedly connected to the threaded rod, and an adjusting disk is fixedly connected to the front end of the threaded rod.

[0008] By adopting the above scheme, it is difficult to accurately control the air output of the fan after the blades are adjusted horizontally. The restriction on the blades can be released by turning the bolts and nuts, so that the blades can slide on the outside of the connecting piece, thereby adjusting the extended length of the blades and the connecting piece. The blades are positioned in conjunction with the through holes, bolts and nuts, and the extended length of the blades and the connecting piece can be adjusted to control the air output.

[0009] Optionally, a dustproof shell is fixedly installed on the front side of the housing by two sets of screws, and a dustproof net is fixedly connected to the inner wall of the dustproof shell.

[0010] By adopting the above solution, the inhaled air can be filtered through the dustproof shell and the dustproof net to prevent dust from entering the interior of the shell along with the air.

[0011] Furthermore, a protective cover is sleeved on the outer surface of the motor, the front side of the protective cover is fixedly connected to the back side of the casing, and the inner wall of the protective cover is fixedly connected to a filter.

[0012] By adopting the above solution, the motor can be protected by the protective cover to prevent the motor from being hit, and at the same time, the filter net can be used to dissipate heat outwards while preventing dust from entering the protective cover.

[0013] Furthermore, a connection plate is fixedly connected to the top end of the air outlet pipe, and a group of mounting holes arranged at equal distances are formed on the upper surface of the connection plate.

[0014] By adopting the above solution, the air outlet pipe can be easily connected to other pipes through the connecting plate, thereby speeding up the installation efficiency of the workers.

[0015] Furthermore, two threaded holes are provided on the front side of the adjusting disk, and the inner wall of each threaded hole is threadedly connected with a threaded positioning pin.

[0016] By adopting the above solution, the adjusting disk can be positioned by means of the threaded positioning pins and the threaded holes, thereby increasing the stability of the adjusting disk and preventing the threaded rod from rotating during the operation of the equipment.

[0017] A handle is fixedly connected to the upper surface of the casing, and a nameplate is fixedly connected to the outer surface of the casing.

[0018] By adopting the above scheme, the device can be conveniently carried by hand by providing a handle, thereby facilitating the movement of the device, and the information of the device can be displayed by using a nameplate, so that the user can understand the device.

[0019] Two support frames are arranged below the casing, and the upper surface of each support frame is fixedly connected to the outer surface of the casing.

[0020] By adopting the above solution, the device can be supported by the support frame, thereby increasing the stability of the device.

[0021] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0022] 1. The utility model is provided with a motor to provide power to the connecting shaft, so that the connecting shaft can drive the connecting cylinder to rotate, and the connecting cylinder can rotate the blades through the cooperation of the threaded adjustment ring and the connecting piece, so that the wind can be discharged through the air outlet pipe. The position of the blades can be adjusted by using the sliding connection between the blades and the connecting piece. At the same time, the bolts and nuts can ensure the stability of the blades after adjustment to prevent the blades from loosening. The length of the blades during operation can be adjusted in conjunction with the connecting piece, so the air output of the equipment can be controlled.

[0023] 2. The utility model is set up to utilize the threaded connection of the threaded rod and the threaded adjustment ring, so that the threaded adjustment ring can control the position of the connecting piece and the blade, so that the blade can maintain the same horizontal plane as the air inlet of the air outlet duct, thereby ensuring the transmission of wind force. The cooperation of the dustproof net and the dustproof shell can filter the air entering the casing to prevent dust from accumulating inside the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0025] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0026] Figure 2It is a three-dimensional structural schematic diagram of the front cross-section of the utility model;

[0027] Figure 3 It is a three-dimensional structural schematic diagram of a top-sectional view of the utility model;

[0028] Figure 4 It is a three-dimensional structural schematic diagram of a side sectional view of the utility model.

[0029] In the figure: 1. support frame; 2. casing; 3. air outlet duct; 4. connecting plate; 5. dust cover; 6. dust net; 7. handle; 8. nameplate; 9. blade; 10. bolt; 11. connecting piece; 12. adjustment slot; 13. motor; 14. connecting tube; 15. through hole; 16. nut; 17. threaded hole; 18. adjustment plate; 19. protective cover; 20. threaded positioning pin; 21. threaded rod; 22. threaded adjustment ring; 23. connecting shaft; 24. filter net. DETAILED DESCRIPTION

[0030] The following will disclose multiple embodiments of the utility model with diagrams. For the purpose of clear description, many physical details will be described together in the following description. However, it should be understood that these physical details should not be used to limit the utility model. In other words, in some embodiments of the utility model, these physical details are not necessary. In addition, for the purpose of simplifying the diagram, some conventional structures and components will be depicted in a simple schematic manner in the diagram.

[0031] See also Figure 1-Figure 4 The centrifugal fan with adjustable blades of the utility model comprises a casing 2, two support frames 1 are arranged under the casing 2, the upper surface of each support frame 1 is fixedly connected to the outer surface of the casing 2, the casing 2 is supported by the support frame 1, so that the casing 2 is more stable, and the device is convenient to place to prevent sliding, a dustproof shell 5 is fixedly installed on the front of the casing 2 by two sets of screws, and a dustproof net 6 is fixedly connected to the inner wall of the dustproof shell 5, and the air entering the inside of the casing 2 can be filtered by the dustproof shell 5 and the dustproof net 6 to reduce the dust from entering the inside of the casing 2, and the outer surface of the casing 2 is fixedly connected with an air outlet duct 3, and the back of the casing 2 is fixedly connected with a motor 13, and the back of the casing 2 is rotatably connected with a connecting shaft 23 through a bearing, and the rear end of the connecting shaft 23 is fixedly connected to the output end of the motor 13, and the front end of the connecting shaft 23 is fixedly connected with a connecting cylinder 14, and the motor 13 works and applies kinetic energy to the connecting shaft 23, so that the connecting shaft 23 can drive the connecting cylinder 14 to rotate.

[0032] A group of equally spaced adjustment grooves 12 are provided on the outer surface of the connecting tube 14, and a connecting piece 11 is slidably connected to the inner wall of each adjusting groove 12, and a blade 9 is slidably connected to the outer surface of each connecting piece 11, and a group of through holes 15 are provided on the outer surface of each blade 9 and the outer surface of the connecting piece 11. A group of blades 9 are fixedly installed with a group of blades 9 through a group of bolts 10 and a group of nuts 16 respectively. The connecting tube 14 can drive the blades 9 to rotate through the connecting piece 11, the bolts 10 and the nuts 16, so that the air outlet 3 can blow air, and the position of the blades 9 can be adjusted through the cooperation of the bolts 10 and the nuts 16, and the length of each blade 9 can be adjusted in cooperation with the connecting piece 11, so as to adjust the air outlet volume. A group of connecting pieces 11 are close to each other. A threaded adjustment ring 22 is fixedly connected to one side surface, and a threaded rod 21 is rotatably connected to the front side of the connecting tube 14 through a bearing. The rear end of the threaded rod 21 extends to the inside of the threaded adjustment ring 22, and the threaded adjustment ring 22 is threadedly connected to the threaded rod 21. By rotating the threaded rod 21, the threaded rod 21 is threadedly connected to the threaded adjustment ring 22, and the threaded adjustment ring 22 is controlled to adjust the position of the blade 9. An adjustment disk 18 is fixedly connected to the front end of the threaded rod 21. Two threaded holes 17 are provided on the front side of the adjustment disk 18. The inner wall of each threaded hole 17 is threadedly connected to a threaded positioning pin 20. The adjustment disk 18 can be positioned by cooperating with the threaded positioning pin 20 and the threaded hole 17 to prevent the adjustment disk 18 from rotating as the equipment runs.

[0033] See also Figure 1 , Figure 2 and Figure 4 The top of the air outlet pipe 3 is fixedly connected with a connecting plate 4, and a group of mounting holes arranged at equal distances are opened on the upper surface of the connecting plate 4. The connecting plate 4 can be used to facilitate the connection of the device with other pipes, thereby reducing the time required for installation.

[0034] In this embodiment, a handle 7 is fixedly connected to the upper surface of the casing 2, and a nameplate 8 is fixedly connected to the outer surface of the casing 2. The handle 7 can be used to facilitate carrying the device and adjusting the position of the device. The nameplate 8 can be used to mark device parameters and precautions to facilitate users to understand the device.

[0035] In this embodiment, a protective cover 19 is provided on the outer surface of the motor 13, the front side of the protective cover 19 is fixedly connected to the back side of the casing 2, and a filter screen 24 is fixedly connected to the inner wall of the protective cover 19. Through the cooperation between the protective cover 19 and the filter screen 24, the motor 13 can be protected while the heat of the motor 13 can be dissipated outward.

[0036] The above description is only an embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the scope of the claims of the present invention.

Claims

1. A centrifugal fan with adjustable blades, comprising a casing (2), characterized in that: The outer surface of the casing (2) is fixedly connected to an air outlet duct (3), the back of the casing (2) is fixedly connected to a motor (13), the back of the casing (2) is rotatably connected to a connecting shaft (23) via a bearing, the rear end of the connecting shaft (23) is fixedly connected to an output end of the motor (13), the front end of the connecting shaft (23) is fixedly connected to a connecting cylinder (14), the outer surface of the connecting cylinder (14) is provided with a group of adjustment grooves (12) arranged at equal distances, the inner wall of each adjustment groove (12) is slidably connected to a connecting sheet (11), the outer surface of each connecting sheet (11) is slidably connected to a blade (9), and each blade A group of through holes (15) are formed on the outer surface of the blade (9) and the outer surface of the connecting piece (11); a group of the blades (9) are fixedly mounted on a group of the blades (9) by a group of bolts (10) and a group of nuts (16); a threaded adjustment ring (22) is fixedly connected to a side surface of a group of the connecting pieces (11) close to each other; a threaded rod (21) is rotatably connected to the front surface of the connecting tube (14) through a bearing; a rear end of the threaded rod (21) extends to the inside of the threaded adjustment ring (22); the threaded adjustment ring (22) is threadedly connected to the threaded rod (21); and an adjustment disk (18) is fixedly connected to the front end of the threaded rod (21).

2. A centrifugal fan with adjustable blades according to claim 1, characterized in that: A dustproof shell (5) is fixedly mounted on the front of the housing (2) by means of two sets of screws, and a dustproof net (6) is fixedly connected to the inner wall of the dustproof shell (5).

3. A centrifugal fan with adjustable blades according to claim 1, characterized in that: The outer surface of the motor (13) is sleeved with a protective cover (19), the front side of the protective cover (19) is fixedly connected to the back side of the casing (2), and the inner wall of the protective cover (19) is fixedly connected to a filter screen (24).

4. A centrifugal fan with adjustable blades according to claim 1, characterized in that: The top end of the air outlet pipe (3) is fixedly connected to a connection plate (4), and a group of mounting holes arranged at equal distances are provided on the upper surface of the connection plate (4).

5. The centrifugal fan with adjustable blades according to claim 1, characterized in that: Two threaded holes (17) are provided on the front side of the adjusting disk (18), and a threaded positioning nail (20) is threadedly connected to the inner wall of each threaded hole (17).

6. The centrifugal fan with adjustable blades according to claim 1, characterized in that: A handle (7) is fixedly connected to the upper surface of the casing (2), and a nameplate (8) is fixedly connected to the outer surface of the casing (2).

7. The centrifugal fan with adjustable blades according to claim 1, characterized in that: Two support frames (1) are provided below the casing (2), and the upper surface of each support frame (1) is fixedly connected to the outer surface of the casing (2).

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