Fan air hole size adjusting device

Abstract

The utility model discloses a fan air hole size adjusting device, and relates to the technical field of fans. The fan air hole size adjusting device comprises a hollow pipe body shell with the left side and the right side open, the front end and the rear end of the pipe body shell are connected with a fan pipeline, a worm wheel is rotationally connected into the pipe body shell pipeline, the outer side of the worm wheel is sleeved with a worm wheel shell, and the inner side of the worm wheel shell is fixedly connected with the outer side of the pipe body shell; a worm is connected to the lower end of the interior of the worm gear shell, the worm gear and the worm are meshed with each other, an adjusting pushing ring is connected to the inner side of the worm gear, an arc is formed in the inner side of the adjusting pushing ring, a T-shaped sliding groove is formed in the middle of the inner side of the adjusting pushing ring, and a rolling wheel is arranged in the sliding groove; a connecting rod is rotatably connected to the inner side of the roller, a baffle is connected to the inner side of the connecting rod, a support is connected to the outer side of the front end of the baffle, and a support is fixedly connected to the interior of the front end of the pipe shell.

Description

Technical Field

[0001] The utility model relates to the technical field of fans, in particular to a device for adjusting the size of air holes of a fan. Background Art

[0002] A fan is a general-purpose machine, mainly used for conveying gas. It converts the mechanical energy of the prime mover into the energy of the conveyed fluid, including pressure energy and kinetic energy, to achieve directional conveying of the fluid. The working principle of a fan is usually to generate kinetic energy by driving the impeller to rotate at high speed by an electric motor, squeeze and accelerate the gas, so that the gas obtains energy and generates airflow. It is mainly used for ventilation of factories, mines, tunnels, cooling towers, vehicles, ships and buildings. Before the fan in a thermal power plant works, it is necessary to detect the inlet and outlet pressure, power consumption, flow rate, etc. of the fan. The fan aperture needs to be adjusted during the detection. The existing fan air hole size adjustment device is mostly installed by installing a baffle inside the pipeline. When the air volume needs to be adjusted, the baffle is rotated to adjust the area through which the wind passes. However, when in use, it will have a more serious impact on the wind direction and wind speed. Therefore, a fan air hole size adjustment device is designed to solve the above problems. Utility Model Content

[0003] 1. Technical issues to be resolved

[0004] In view of the deficiencies in the prior art, the utility model provides a device for adjusting the size of a fan air hole, which solves the problem that the existing device for adjusting the size of a fan air hole will affect the wind direction and wind speed when adjusting the hole size, thereby affecting the inspection accuracy.

[0005] (II) Technical solution

[0006] In order to achieve the above objectives, the present invention is implemented through the following technical solutions:

[0007] The utility model provides a device for adjusting the size of a fan air hole, comprising: a tube body shell which is hollow inside and has openings on the left and right sides, the front and rear ends of the tube body shell being connected to the fan pipeline, a worm gear being rotatably connected in the tube body shell pipeline, a worm gear shell being sleeved on the outer side of the worm gear, the inner side of the worm gear shell being fixedly connected to the outer side of the tube body shell, a worm being connected to the lower end of the worm gear shell, the worm gear and the worm being meshed with each other, the front and rear ends of the worm being connected to the worm gear shell via bearings, an adjustment push ring being connected to the inner side of the worm gear, and the inner side of the adjustment push ring being fixedly connected to the outer side of the tube body shell. An arc is opened on the side, the arc on the inner side of the adjustment push ring is tangent to the outer side of the adjustment push ring, a T-shaped slide groove is opened in the middle of the inner side of the adjustment push ring, the slide groove is arc-shaped and has the same center as the arc on the inner side of the adjustment push ring, a roller is arranged inside the slide groove, a connecting rod is rotatably connected to the inner side of the roller, a baffle is connected to the inner side of the connecting rod, the baffle is arc-shaped as a whole, and two adjacent baffles are tangent to each other, a bracket is connected to the outer side of the front end of the baffle, a support is fixedly connected to the inside of the front end of the tube body shell, and the bracket is rotatably connected to the support.

[0008] Preferably, an observation window is provided at the lower end of the rear surface of the worm gear housing and at the meshing position of the worm gear and the worm, and an opening and closing percentage is marked around the outer side of the front surface of the worm gear.

[0009] Preferably, the outer side of the baffle is provided with an arc chamfer.

[0010] Preferably, a reduction box is provided at the front end of the worm, the output end of the reduction box is fixedly connected to the input end of the worm, and the input end of the reduction box is connected to a motor.

[0011] Preferably, balls are rotatably connected to the inner portion of the outer side of the thicker end of the baffle in an array, and the outer sides of the balls are exposed to the outside of the baffle.

[0012] Preferably, the diameter of the front section of the tube body shell is the same as the diameter of the fan duct, and a guide slope is provided inside the tube body shell and at the front end of the support.

[0013] Preferably, the baffle plate and the support are both arranged at an oblique angle of three to five degrees with the inner side of the worm gear.

[0014] (III) Beneficial effects

[0015] The utility model provides a device for adjusting the size of a fan air hole, which has at least the following beneficial effects compared with the prior art:

[0016] The device for adjusting the size of the wind hole of the fan can gradually reduce the area of ​​the front end of the baffle plate when adjusting the hole diameter, thereby reducing the influence on the wind speed and pressure, and will not affect the wind direction. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the utility model;

[0018] Figure 2 It is the front view of the utility model;

[0019] Figure 3 This is an axial sectional view of the utility model;

[0020] Figure 4 This is a sectional view of the front section of the utility model;

[0021] Figure 5 This is a cross-sectional view of the rear section of the utility model;

[0022] Figure 6 It is a partial enlarged view of the utility model.

[0023] In the figure: 1. tube body shell; 2. worm gear; 3. worm gear shell; 4. worm; 5. adjustment push ring; 6. slide groove; 7. roller; 8. connecting rod; 9. baffle; 10. bracket; 11. support; 21. reduction box; 22. motor; 23. ball; 24. observation window. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] See also Figure 1-6The utility model provides a technical solution: a device for adjusting the size of a fan air hole, comprising: a tube body shell 1 which is hollow inside and has openings on both sides, the front and rear ends of the tube body shell 1 are connected to the fan pipeline, a worm wheel 2 is rotatably connected in the pipeline of the tube body shell 1, a worm wheel shell 3 is sleeved on the outside of the worm wheel 2, the inner side of the worm wheel shell 3 is fixedly connected to the outer side of the tube body shell 1, a worm 4 is connected to the lower end of the worm wheel shell 3, the worm wheel 2 and the worm 4 are meshed with each other, the front and rear ends of the worm 4 are connected to the worm wheel shell 3 through bearings, the inner side of the worm wheel 2 is connected to an adjustment push ring 5, and the inner side of the adjustment push ring 5 is connected to the inner side of the worm wheel 2. An arc is opened on the side, the arc inside the adjusting push ring 5 is tangent to the outer side of the adjusting push ring 5, a T-shaped slide groove 6 is opened in the middle of the inner side of the adjusting push ring 5, the slide groove 6 is in an arc shape and has the same center as the arc inside the adjusting push ring 5, a roller 7 is arranged inside the slide groove 6, a connecting rod 8 is rotatably connected to the inner side of the roller 7, a baffle 9 is connected to the inner side of the connecting rod 8, the baffle 9 is in an arc shape as a whole, and two adjacent baffles 9 are tangent to each other, a bracket 10 is connected to the outer side of the front end of the baffle 9, a support 11 is fixedly connected to the inside of the front end of the tube body shell 1, and the bracket 10 is rotatably connected to the support 11.

[0026] When in use, the tube body shell 1 is installed on the pipe of the fan, with the front end as the air inlet position and the rear end as the air outlet position. When the aperture size of the air outlet position needs to be adjusted, the worm 4 is rotated clockwise, and the worm gear 2 will rotate, and the adjustment push ring 5 is fixedly connected to the inside of the worm gear 2, and the worm gear 2 will drive the adjustment push ring 5 to rotate together. At this time, the slide groove 6 inside the adjustment push ring 5 will push the roller 7 to rotate. Since the height of one end of the adjustment push ring 5 is higher than the other end, the slide groove 6 will push the baffle 9 outward through the connecting rod 8, and the lower end of the baffle 9 is rotatably connected to the support 11 through the bracket 10. When the baffle 9 is pushed outward, it will rotate around the support 11. At this time, the arc surface of the baffle 9 will be close to the outer side of the adjacent baffle 9, and the diameter of the rear end of the baffle 9 will gradually decrease, thereby adjusting the size of the air hole of the fan.

[0027] like Figure 1-5 As shown, an embodiment of the utility model provides an implementation method. Based on the above implementation method, an observation window 24 is provided at the lower end of the rear surface of the worm gear housing 3 and located at the meshing point between the worm gear 2 and the worm 4, and the opening and closing percentage is marked on the outer side of the front surface of the worm gear 2.

[0028] From the analysis of the above structure, it can be known that when the worm 4 is rotated, the rotation angle of the worm wheel 2 can be observed through the observation window 5, and the contraction area of ​​the rear end of the baffle 9 can be determined by the opening and closing percentages marked on the outer circle.

[0029] like Figure 1-5As shown, the embodiment of the utility model provides an implementation method. Based on the above implementation method, the outer side of the baffle 9 is provided with a circular arc chamfer.

[0030] From the analysis of the above structure, it can be seen that when adjacent baffles 9 are stacked together, the arc chamfer can play a guiding role, while reducing the contact surface and reducing the friction.

[0031] like Figure 1-3 As shown, an embodiment of the utility model provides an implementation method. Based on the above implementation method, a reduction box 21 is provided at the front end of the worm 4, the output end of the reduction box 21 is fixedly connected to the input end of the worm 4, and the input end of the reduction box 21 is connected to a motor 22.

[0032] From the analysis of the above structure, it can be known that when the motor 22 is started, the output end of the motor 22 will drive the worm 4 to rotate after the speed is reduced and the torque is increased through the reduction box 21, so as to facilitate the control of the speed of the worm 4.

[0033] like Figure 1-3 As shown, an embodiment of the utility model provides an implementation method. Based on the above implementation method, the outer side of the thicker end of the baffle 9 is rotatably connected with balls 23 in an array, and the outer side of the balls 23 is exposed outside the baffle 9.

[0034] It can be seen from the analysis of the above structure that when two adjacent baffles 9 are opened and stacked together, the balls 23 will reduce the friction between the baffles 9 .

[0035] like Figure 1-4 As shown, an embodiment of the utility model provides an implementation method. Based on the above implementation method, the diameter of the front section of the tube body shell 1 is the same as the diameter of the fan pipe, and a guide slope is provided inside the tube body shell 1 and at the front end of the support 11.

[0036] Analysis of the above structure shows that the diameter of the front section of the tube shell 1 is the same as the diameter of the fan pipe, which reduces the wind speed impact caused by the change in pipe diameter, and the guide slope at the rear end guides the airflow inward, reducing the impact of the airflow diffusing after entering the rear section of the tube shell 1.

[0037] like Figure 1-6 As shown, the embodiment of the utility model provides an implementation method. Based on the above implementation method, the baffle 9 and the support 11 are both set with an oblique angle of three to five degrees with the inner side of the worm gear 2.

[0038] Analysis of the above structure shows that when the baffle 9 rotates inward, since the baffle 9 and the support 11 are both at an angle of three to five degrees to the inner side of the worm gear 2, the baffle 9 will fit together tangentially, which will reduce the gap between the baffles 9 and reduce the occurrence of air leakage.

[0039] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0040] 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. A device for adjusting the size of a fan air hole, characterized in that: include: A tube body shell (1) is hollow inside and open on both left and right sides, the front and rear ends of the tube body shell (1) are connected to the fan pipeline, a worm wheel (2) is rotatably connected in the tube body shell (1), a worm wheel shell (3) is sleeved on the outside of the worm wheel (2), the inside of the worm wheel shell (3) is fixedly connected to the outside of the tube body shell (1), a worm (4) is connected to the lower end of the worm wheel shell (3), the worm wheel (2) and the worm (4) are meshed with each other, the front and rear ends of the worm (4) are connected to the worm wheel shell (3) via bearings, the inside of the worm wheel (2) is connected to an adjustment push ring (5), the inside of the adjustment push ring (5) is provided with an arc, and the inside of the adjustment push ring (5) is The arc is tangent to the outer side of the adjustment push ring (5); a T-shaped slide groove (6) is provided in the middle of the inner side of the adjustment push ring (5); the slide groove (6) is in an arc shape and has the same center as the arc of the inner side of the adjustment push ring (5); a roller (7) is provided inside the slide groove (6); a connecting rod (8) is rotatably connected to the inner side of the roller (7); a baffle (9) is connected to the inner side of the connecting rod (8); the baffle (9) is in an arc shape as a whole; two adjacent baffles (9) are tangent to each other; a bracket (10) is connected to the outer side of the front end of the baffle (9); a support (11) is fixedly connected to the inner side of the front end of the tube body shell (1); the bracket (10) is rotatably connected to the support (11).

2. A fan air hole size adjustment device according to claim 1, characterized in that: An observation window (24) is provided at the lower end of the rear surface of the worm gear housing (3) and at the meshing position between the worm gear (2) and the worm (4), and an opening and closing percentage is marked around the outer periphery of the front surface of the worm gear (2).

3. The device for adjusting the size of a fan air hole according to claim 1, characterized in that: The baffle (9) has an arc chamfered outer side.

4. The device for adjusting the size of a fan air hole according to claim 1, characterized in that: A reduction box (21) is provided at the front end of the worm (4); an output end of the reduction box (21) is fixedly connected to an input end of the worm (4); and an electric motor (22) is connected to the input end of the reduction box (21).

5. The device for adjusting the size of a fan air hole according to claim 1, characterized in that: The outer side of the thicker end of the baffle (9) is internally connected to balls (23) in an array-like manner, and the outer side of the balls (23) is exposed outside the baffle (9).

6. The device for adjusting the size of a fan air hole according to claim 1, characterized in that: The diameter of the front section of the tube body shell (1) is the same as the diameter of the fan duct, and a guide slope is provided inside the tube body shell (1) and at the front end of the support (11).

7. The device for adjusting the size of a fan air hole according to claim 1, characterized in that: The baffle plate (9) and the support (11) are both arranged at an angle of three to five degrees with the inner side of the worm wheel (2).

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