A fan speed detection mechanism

Abstract

The utility model relates to fan rotating speed detection technical field, and disclose a kind of fan rotating speed detection mechanism, including fan assembly, the fan assembly includes base, motor and shell, the inside rotation of the shell is connected with shaft, the outer surface of support plate is rotatably connected with support shaft, the outer surface of shaft is fixedly provided with first transmission wheel, the outer surface of support shaft is fixedly provided with second transmission wheel, the outer surface between first transmission wheel and second transmission wheel is movably wound with belt, the outer surface of vertical board is penetrated with threaded rod, the outer surface of support frame is provided with tension pulley. By rotating threaded rod and driving support frame to move, support frame drives tension pulley to move, tighten belt by tension pulley, so as to adjust the tension degree of belt, avoid the phenomenon that belt appears relaxation, cause first transmission wheel and second transmission wheel cannot synchronously rotate, ensure the effect of fan rotating speed detection.

Description

Technical Field

[0001] This utility model relates to the field of fan speed detection technology, specifically a fan speed detection mechanism. Background Technology

[0002] With the continuous development of industrial automation and intelligence, ventilation systems have been widely used in many fields. As the core component of the ventilation system, the monitoring of the fan's operating status is crucial. The fan's rotational speed is one of the key parameters for measuring its performance and operating status. Accurate and real-time monitoring of the fan's rotational speed can not only ensure the efficient operation of the ventilation system, but also detect potential faults in advance, extend the fan's service life, and ensure the safe and stable operation of the equipment.

[0003] In existing technologies, when detecting the speed of a wind turbine, the drive mechanism of the wind turbine drives the transmission wheel to rotate, and the detection pulley rotates under the action of the belt. The speed of the detection pulley is detected by a speed sensor, thereby detecting the speed of the wind turbine. However, the lack of a belt tensioning mechanism may cause the speed of the detection pulley to be inconsistent with that of the transmission wheel on the shaft when using belt drive to rotate the transmission wheel and the detection pulley. Therefore, a wind turbine speed detection mechanism is proposed. Utility Model Content

[0004] In view of the shortcomings of the prior art, this utility model provides a fan speed detection mechanism to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a fan speed detection mechanism, comprising a fan assembly, the fan assembly including a base, a motor and a housing, the motor and the housing both being disposed above the base, a rotating shaft being rotatably connected inside the housing, the output end of the motor being fixedly connected to the rotating shaft, a support plate being fixedly connected to the top outer surface of the housing, a support shaft being rotatably connected to the outer surface of the support plate, a first transmission wheel being fixedly sleeved on the outer surface of the rotating shaft, a second transmission wheel being fixedly sleeved on the outer surface of the support shaft, a belt being movably wound between the outer surfaces of the first and second transmission wheels, a vertical plate being fixedly connected to the top outer surface of the housing, a threaded rod being threaded through the outer surface of the vertical plate, a support frame being rotatably connected to the other end of the threaded rod, a tensioning wheel being provided on the outer surface of the support frame, the tensioning wheel being movably fitted with the inner side of the belt.

[0006] Furthermore, a gear is fixedly sleeved on the outer surface of the support shaft, a mounting plate is provided on the top outer surface of the housing, a vertical plate is fixedly connected to the outer surface of the mounting plate, and a speed sensor is installed on the outer surface of the vertical plate facing the gear.

[0007] Furthermore, a display screen and a controller are installed on the side of the vertical plate away from the speed sensor, and both the speed sensor and the display screen are electrically connected to the controller.

[0008] Furthermore, a through hole is provided on the top outer surface of the housing, through which the belt passes.

[0009] Furthermore, two limiting rods are movably inserted through the outer surface of the upright plate, and the other end of the limiting rods is connected to the support frame.

[0010] Furthermore, the mounting plate is an arc-shaped plate that fits against the surface of the outer shell, and the mounting plate is connected to the outer shell by bolts.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] 1. The fan speed detection mechanism moves the support frame by rotating the threaded rod, and the support frame moves the tensioning wheel. The tensioning wheel tensions the belt, thereby adjusting the belt tension and preventing the belt from becoming loose, which would cause the first and second transmission wheels to not rotate synchronously, thus ensuring the effectiveness of fan speed detection.

[0013] 2. The fan speed detection mechanism detects the speed of the gears through a speed sensor and transmits the detected signal to the controller. The controller then transmits the data to the display screen, allowing the testing personnel to observe the speed. Attached Figure Description

[0014] Figure 1 This is a front view structural diagram of the present invention;

[0015] Figure 2 This is a schematic diagram of the right-side cross-sectional structure of this utility model;

[0016] Figure 3 This utility model Figure 1 Enlarged structural diagram at point A in the middle;

[0017] Figure 4 This utility model Figure 2 Enlarged structural diagram at point B.

[0018] In the diagram: 1. Base; 2. Motor; 3. Housing; 4. Shaft; 5. First transmission wheel; 6. Support plate; 7. Support shaft; 8. Second transmission wheel; 9. Belt; 10. Vertical plate; 11. Threaded rod; 12. Support frame; 13. Tensioner wheel; 14. Mounting plate; 15. Vertical plate; 16. Display screen; 17. Controller. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Example 1:

[0021] Please refer to the following: Figures 1-4 This utility model provides a technical solution: a fan speed detection mechanism, including a fan assembly, which includes a base 1, a motor 2, and a housing 3. The motor 2 and housing 3 are both located above the base 1. A rotating shaft 4 is rotatably connected inside the housing 3. The output end of the motor 2 is fixedly connected to the rotating shaft 4. A support plate 6 is fixedly connected to the top outer surface of the housing 3. A support shaft 7 is rotatably connected to the outer surface of the support plate 6. A first transmission wheel 5 is fixedly sleeved on the outer surface of the rotating shaft 4, and a second transmission wheel 8 is fixedly sleeved on the outer surface of the support shaft 7. A leather strap is movably wound between the outer surfaces of the first transmission wheel 5 and the second transmission wheel 8. A vertical plate 10 is fixedly connected to the top outer surface of the belt 9 and the outer shell 3. A threaded rod 11 is threaded through the outer surface of the vertical plate 10. A support frame 12 is rotatably connected to the other end of the threaded rod 11. A tension wheel 13 is provided on the outer surface of the support frame 12. The tension wheel 13 is in contact with the inner side of the belt 9. Specifically, by rotating the threaded rod 11, the threaded rod 11 drives the support frame 12 to move, and the support frame 12 drives the tension wheel 13 to move, so that the tension wheel 13 tensions the belt 9, preventing the belt 9 from becoming loose, which would cause the first transmission wheel 5 and the second transmission wheel 8 to not rotate synchronously, thus ensuring the effectiveness of the fan speed detection.

[0022] In this embodiment, a gear is fixedly sleeved on the outer surface of the support shaft 7, and a mounting plate 14 is provided on the top outer surface of the housing 3. A vertical plate 15 is fixedly connected to the outer surface of the mounting plate 14. A speed sensor is installed on the side of the outer surface of the vertical plate 15 facing the gear. Specifically, the speed sensor detects the speed of the gear to detect the speed of the fan.

[0023] In this embodiment, a display screen 16 and a controller 17 are installed on the side of the vertical plate 15 away from the speed sensor. The speed sensor and the display screen 16 are both electrically connected to the controller 17. Specifically, the speed sensor transmits the detected signal to the controller 17, and the controller 17 transmits the data to the display screen 16, so that the testing personnel can observe the speed.

[0024] In this embodiment, a through hole is provided on the top outer surface of the housing 3, and the belt 9 passes through the through hole. Specifically, the through hole provides space for the transmission of the belt 9.

[0025] In this embodiment, two limiting rods are movably inserted through the outer surface of the upright plate 10. The other end of the limiting rod is connected to the support frame 12. Specifically, when the threaded rod 11 is rotated and the support frame 12 is moved, the limiting rod moves accordingly. The movement of the support frame 12 is limited by the limiting rod, so as to prevent the support frame 12 from rotating with the rotation of the threaded rod 11.

[0026] In this embodiment, the mounting plate 14 is an arc-shaped plate that fits against the surface of the outer shell 3. The mounting plate 14 is connected to the outer shell 3 by bolts. Specifically, the mounting plate 14 is connected to the outer shell 3 by bolts, which facilitates the disassembly of the mounting plate 14.

[0027] Working Principle: When the fan is running, the motor 2 drives the rotating shaft 4 to rotate, which in turn drives the first transmission wheel 5 to rotate. Under the action of the belt 9, the second transmission wheel 8 rotates, which in turn drives the support shaft 7 to rotate, thereby driving the gear on the support shaft 7 to rotate. When the gear rotates, the teeth of the gear pass through the magnet and coil of the sensor, causing a change in the magnetic field. The speed of the gear is detected by the speed sensor. Assuming that the gear has Z teeth and the pulse frequency output by the speed sensor is f, the speed of the gear n in revolutions per minute can be calculated by the following formula: n = 60 × f / Z. The speed sensor transmits the detected signal to the controller 17, which transmits the data to the display screen 16 for the inspector to observe the speed. By rotating the threaded rod 11, the threaded rod 11 drives the support frame 12 to move, which in turn drives the tensioning wheel 13 to move, so that the tensioning wheel 13 tensions the belt 9, preventing the belt 9 from becoming loose and causing the first transmission wheel 5 and the second transmission wheel 8 to not rotate synchronously, thus ensuring the effectiveness of the fan speed detection.

[0028] The controller 17 is an existing structure, and the control circuit can be implemented by a person skilled in the art through simple programming. It is common knowledge in the field. It is only used and not modified. Therefore, the control method and circuit connection will not be described in detail.

[0029] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A fan speed detection mechanism, comprising a fan assembly, characterized in that: The fan assembly includes a base (1), a motor (2), and a housing (3). The motor (2) and the housing (3) are both located above the base (1). A rotating shaft (4) is rotatably connected inside the housing (3). The output end of the motor (2) is fixedly connected to the rotating shaft (4). A support plate (6) is fixedly connected to the top outer surface of the housing (3). A support shaft (7) is rotatably connected to the outer surface of the support plate (6). A first transmission wheel (5) is fixedly sleeved on the outer surface of the rotating shaft (4). The support shaft (7) The outer surface of the housing (3) is fixedly fitted with a second transmission wheel (8). A belt (9) is movably wound between the outer surfaces of the first transmission wheel (5) and the second transmission wheel (8). A vertical plate (10) is fixedly connected to the top outer surface of the housing (3). A threaded rod (11) is threaded through the outer surface of the vertical plate (10). A support frame (12) is rotatably connected to the other end of the threaded rod (11). A tension wheel (13) is provided on the outer surface of the support frame (12). The tension wheel (13) is movably fitted with the inner side of the belt (9).

2. The fan speed detection mechanism according to claim 1, characterized in that: The outer surface of the support shaft (7) is fixedly fitted with a gear, and the top outer surface of the outer shell (3) is provided with a mounting plate (14). The outer surface of the mounting plate (14) is fixedly connected with a vertical plate (15), and a speed sensor is installed on the side of the outer surface of the vertical plate (15) facing the gear.

3. The fan speed detection mechanism according to claim 2, characterized in that: The vertical plate (15) is equipped with a display screen (16) and a controller (17) on the side away from the speed sensor. The speed sensor and the display screen (16) are both electrically connected to the controller (17).

4. The fan speed detection mechanism according to claim 1, characterized in that: The outer surface of the top of the outer casing (3) has a through hole, and the belt (9) passes through the through hole.

5. The fan speed detection mechanism according to claim 1, characterized in that: Two limiting rods are movably inserted through the outer surface of the upright plate (10), and the other end of the limiting rods is connected to the support frame (12).

6. The fan speed detection mechanism according to claim 2, characterized in that: The mounting plate (14) is an arc-shaped plate that fits against the surface of the outer shell (3), and the mounting plate (14) is connected to the outer shell (3) by bolts.

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