Plastic axial flow fan

Abstract

The utility model discloses a kind of plastic axial flow fan, including impeller, fan blade and connecting assembly, the outside of impeller is provided with connecting seat, the inside of connecting seat is provided with movable connecting assembly, the root of fan blade is provided with connecting plate, connecting plate is slidably connected with connecting seat, connecting assembly is fixed to connecting plate with limit to connect fan blade and impeller fixedly, the inside of impeller is provided with connecting shaft, one side of impeller is provided with frame, the connecting place of frame and connecting shaft is provided with inner ring, connecting shaft is rotatably connected with inner ring through bearing;The utility model sets up fan blade and impeller in whole, using the sliding connection of connecting plate and connecting seat to assemble fan blade and impeller, and using connecting assembly to prevent the sliding between connecting plate and connecting seat, to connect and fix fan blade and impeller, when a group of fan blade breaks, movable connecting assembly removes the limit to connecting plate, after taking down old fan blade, new fan blade is replaced.

Description

Technical Field

[0001] This utility model belongs to the field of fan technology, and in particular relates to a plastic axial flow fan. Background Technology

[0002] Axial flow fans are fluid machines widely used in industry, construction, and ventilation. They are characterized by airflow parallel to the fan axis, resulting in high flow rates and low pressure. Axial flow fans mainly consist of core components such as an impeller, casing, motor, and guide vanes. The impeller is the key component, typically composed of multiple twisted blades fixed to the shaft by a hub. The blades are usually made of plastic or metal.

[0003] When the motor drives the impeller to rotate, the blades propel the air axially. The casing is typically a cylindrical structure used to support the impeller and guide the airflow, while also reducing noise and eddy current losses. The motor, as the power source, drives the impeller to rotate at high speed, either directly or through a transmission device.

[0004] Currently, the blades and impellers of plastic axial flow fans are molded as a single piece, making it impossible to replace the blades. Since the material strength of plastic is not very high, if it comes into contact with a hard object during high-speed rotation, it is very easy for the blades to break. In addition, most of the current blades are odd in number, which means that after the blades break, the dynamic balance will be disrupted, causing the fan to rotate eccentrically, which can easily damage the fan bearings. Utility Model Content

[0005] To overcome the problem that most plastic axial flow fans have blades and impellers molded as one piece, making it impossible to replace the blades, and because the material strength of plastic is not very high, the blades are very easy to break if they come into contact with hard objects when rotating at high speed.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0007] A plastic axial flow fan includes an impeller, blades, and a connecting assembly. A connecting seat is provided on the outer side of the impeller, and a movable connecting assembly is provided on the inner side of the connecting seat. A connecting plate is provided at the root of the blades, and the connecting plate is slidably connected to the connecting seat. The connecting assembly limits and fixes the connecting plate, thereby fixing the blades and the impeller. A connecting shaft is provided on the inner side of the impeller, and a frame is provided on one side of the impeller. An inner ring is provided at the connection between the frame and the connecting shaft, and the connecting shaft is rotatably connected to the inner ring through a bearing.

[0008] Furthermore, an outer ring is provided outside the inner ring, and a stator, which is a coil, is provided between the outer ring and the inner ring.

[0009] Furthermore, a rotor is installed on the inner side of the impeller. The rotor is a permanent magnet, and the magnetic poles of two adjacent sets of rotors are in opposite directions. During installation, a certain gap is left between the rotor and the outer ring.

[0010] Furthermore, a connecting groove is provided on the inner side of the connecting seat, the width of which is the same as the width of the connecting plate, and a limiting protrusion is provided on the inner side of the opening of the connecting groove.

[0011] Furthermore, limit steps are provided on both sides of the connecting plate, and the width of the limit steps is consistent with the spacing of the limit protrusions.

[0012] Furthermore, the connecting assembly includes a limiting rod and a spring, a guide hole is provided in the connecting groove, the limiting rod is slidably connected in the guide hole, and a limiting hole is provided at the connection between the connecting plate and the limiting rod.

[0013] Furthermore, a synchronizing plate is fixedly connected to the upper end of the limiting rod. The width of the synchronizing plate is the same as the width of the connecting groove. A spring is provided at the bottom of the synchronizing plate, and force plates are provided on both sides of the synchronizing plate.

[0014] This utility model, by adopting the above-mentioned technical solution, has the following beneficial effects:

[0015] This invention separates the fan blades and impeller, assembling them using a sliding connection between a connecting plate and a connecting seat. A connecting assembly prevents sliding between the connecting plate and the connecting seat, thus fixing the fan blades and impeller in place. When a set of fan blades breaks, the movable connecting assembly releases the limiting effect on the connecting plate, allowing the old fan blades to be removed and replaced with new ones. Furthermore, different lengths of fan blades can be used to create different applications, such as a large-diameter, low-speed ventilation fan and a high-speed, small-diameter air pressure fan. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings:

[0017] Figure 1 This is a schematic diagram of the structure of a plastic axial flow fan according to the present invention;

[0018] Figure 2 This is a schematic diagram of the stator structure in this utility model;

[0019] Figure 3 This is a schematic diagram of the rotor structure in this utility model;

[0020] Figure 4 This is a schematic diagram of the impeller structure in this utility model;

[0021] Figure 5 This is a schematic diagram of the fan blade structure in this utility model;

[0022] Figure 6This is a schematic diagram of the connecting component in this utility model.

[0023] In the diagram: 1-Impeller; 101-Connecting shaft; 102-Rotor; 103-Connecting seat; 104-Connecting groove; 105-Limiting flange; 106-Guide hole; 2-Fan blade; 201-Connecting plate; 202-Limiting step; 203-Limiting hole; 3-Frame; 4-Stator; 401-Outer ring; 402-Inner ring; 5-Limiting rod; 501-Synchronizing plate; 502-Power plate; 6-Spring. Detailed Implementation

[0024] like Figures 1 to 6 As shown, this utility model discloses a plastic axial flow fan, including an impeller 1, a fan blade 2, and a connecting assembly. A connecting seat 103 is provided on the outer side of the impeller 1, and a movable connecting assembly is provided on the inner side of the connecting seat 103. A connecting plate 201 is provided at the root of the fan blade 2, and the connecting plate 201 is slidably connected to the connecting seat 103. The connecting assembly limits and fixes the connecting plate 201, thereby fixing the fan blade 2 to the impeller 1. A connecting shaft 101 is provided on the inner side of the impeller 1, and a frame 3 is provided on one side of the impeller 1. The frame 3 is connected to the connecting shaft 101. An inner ring 402 is provided at the connection point, and the connecting shaft 101 is rotatably connected to the inner ring 402 through a bearing. By separating the fan blade 2 and the impeller 1, the fan blade 2 and the impeller 1 are assembled by the sliding connection between the connecting plate 201 and the connecting seat 103, and the connecting component is used to prevent the sliding between the connecting plate 201 and the connecting seat 103, thereby connecting and fixing the fan blade 2 and the impeller 1. When a set of fan blades 2 breaks, the movable connecting component releases the limit on the connecting plate 201, and the old fan blade 2 is removed and replaced with a new fan blade 2.

[0025] like Figures 2 to 3 As shown, in this embodiment, an outer ring 401 is provided on the outside of the inner ring 402, and a stator 4 is provided between the outer ring 401 and the inner ring 402. The stator 4 is a coil, and a rotor 102 is provided on the inside of the impeller 1. The rotor 102 is a permanent magnet, and the magnetic poles of two adjacent sets of rotors 102 are opposite. During installation, a certain gap is left between the rotor 102 and the outer ring 401. The stator 4 is fixed with the frame 3, and the rotor 102 rotates with the impeller 1. During use, the stator 4 generates a constantly changing magnetic field to attract the rotor 102, thereby causing the impeller 1 to rotate.

[0026] like Figures 4 to 6As shown, in this embodiment, a connecting groove 104 is provided on the inner side of the connecting seat 103. The width of the connecting groove 104 is the same as the width of the connecting plate 201. A limiting flange 105 is provided on the inner side of the opening of the connecting groove 104. Limiting steps 202 are provided on both sides of the connecting plate 201. The width of the limiting steps 202 is the same as the spacing of the limiting flanges 105. The connecting assembly includes a limiting rod 5 and a spring 6. A guide hole 106 is provided in the connecting groove 104. The limiting rod 5 is slidably connected in the guide hole 106. A limiting hole 203 is provided at the connection between the connecting plate 201 and the limiting rod 5. A synchronization plate 501 is fixedly connected to the upper end of the limiting rod 5. The width of the synchronization plate 501 is... With the same width as the connecting groove 104, a spring 6 is provided at the bottom of the synchronizing plate 501, and force plates 502 are provided on both sides of the synchronizing plate 501. When replacing the fan blade 2, the synchronizing plate 501 is pressed down towards the axis of the impeller 1 using force. The synchronizing plate 501 drives all the limiting rods 5 to retract into the guide hole 106. At this time, the fan blade 2 is pulled to separate the connecting plate 201 from the connecting groove 104, thereby removing the fan blade 2. Then, the connecting plate 201 of the new fan blade 2 is aligned with the connecting groove 104 and inserted. After that, the hand is released, and the spring 6 releases energy to push the synchronizing plate 501 and the limiting rods 5 to move towards the connecting plate 201, and the limiting rods 5 are inserted into the limiting hole 203 to limit the fan blade 2.

[0027] When replacing fan blade 2, the synchronous plate 501 is pressed down towards the axis of impeller 1 using the force of the synchronous plate 501. The synchronous plate 501 drives all the limit rods 5 to retract into the guide hole 106. At this time, the fan blade 2 is pulled to separate the connecting plate 201 from the connecting groove 104, thereby removing the fan blade 2. Then, the connecting plate 201 of the new fan blade 2 is aligned with the connecting groove 104 and inserted. After releasing the hand, the spring 6 releases energy to push the synchronous plate 501 and the limit rods 5 towards the connecting plate 201, and causes the limit rods 5 to be inserted into the limit hole 203 to limit the fan blade 2.

[0028] When the fan is working, the stator 4 is fixed with the frame 3, and the rotor 102 rotates with the impeller 1. During use, the stator 4 generates a constantly changing magnetic field that attracts the rotor 102, thereby causing the impeller 1 to rotate. Under the action of the centrifugal force of rotation, the limiting rod 5 improves the limiting ability of the connecting plate 201, preventing the fan blade 2 from sliding under high-speed rotation.

[0029] Through the above steps, the fan blade 2 and impeller 1 are set separately, and the fan blade 2 and impeller 1 are assembled by the sliding connection between the connecting plate 201 and the connecting seat 103. The connecting component prevents the sliding between the connecting plate 201 and the connecting seat 103, thereby connecting and fixing the fan blade 2 and impeller 1. When a set of fan blades 2 breaks, the movable connecting component releases the restriction on the connecting plate 201, and the old fan blade 2 is removed and replaced with a new fan blade 2.

[0030] The above are merely specific embodiments of this utility model, but the technical features of this utility model are not limited thereto. Any simple changes, equivalent substitutions, or modifications made based on this utility model to solve essentially the same technical problems and achieve essentially the same technical effects are all covered within the protection scope of this utility model.

Claims

1. A plastic axial flow fan, comprising an impeller; characterized in that: It also includes fan blades and connecting components. A connecting seat is provided on the outer side of the impeller, and a movable connecting component is provided on the inner side of the connecting seat. A connecting plate is provided at the root of the fan blade. The connecting plate is slidably connected to the connecting seat. The connecting component limits and fixes the connecting plate, thereby fixing the fan blade to the impeller. A connecting shaft is provided on the inner side of the impeller. A frame is provided on one side of the impeller. An inner ring is provided at the connection between the frame and the connecting shaft. The connecting shaft is rotatably connected to the inner ring through a bearing.

2. A plastic axial flow fan according to claim 1, characterized in that: An outer ring is provided outside the inner ring, and a stator, which is a coil, is provided between the outer ring and the inner ring.

3. A plastic axial flow fan according to claim 2, characterized in that: The impeller has a rotor inside, which is a permanent magnet. The magnetic poles of two adjacent sets of rotors are in opposite directions. When installing, there is a certain gap between the rotor and the outer ring.

4. A plastic axial flow fan according to claim 1, characterized in that: The inner side of the connector is provided with a connecting groove, the width of which is the same as the width of the connecting plate, and a limit flange is provided on the inner side of the opening of the connecting groove.

5. A plastic axial flow fan according to claim 4, characterized in that: Limiting steps are provided on both sides of the connecting plate, and the width of the limiting steps is consistent with the spacing of the limiting protrusions.

6. A plastic axial flow fan according to claim 4, characterized in that: The connecting assembly includes a limit rod and a spring. A guide hole is provided in the connecting groove, and the limit rod is slidably connected in the guide hole. A limit hole is provided at the connection between the connecting plate and the limit rod.

7. A plastic axial flow fan according to claim 6, characterized in that: A timing plate is fixedly connected to the upper end of the limiting rod. The width of the timing plate is the same as the width of the connecting groove. A spring is installed at the bottom of the timing plate, and force plates are installed on both sides of the timing plate.

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