A fan with an inner rotor middle flange motor

Abstract

The application relates to a fan with an inner rotor middle flange motor, which comprises a frame and an impeller, the frame is provided with an inner rotor motor, a flange is arranged at the middle position of the inner rotor motor, the flange is integrally formed with the surface of the inner rotor motor, one side of the flange close to the frame is connected with the frame, one end of an output shaft contained in the inner rotor motor penetrates through the frame and is connected with the impeller at the side close to the inner rotor motor, a recessed groove is arranged at the side close to the motor of the impeller, and one end of the output shaft contained in the inner rotor motor is located in the recessed groove on the impeller. According to the application, the impeller and the output end of the inner rotor motor are located between the frame, the overall axial length of the fan is greatly shortened, the middle fixing mode of the middle flange further avoids the occupation of extra space by the end support structure, the overall volume of the fan is more compact, the installation space is saved, and the space size of the whole fan is reduced.

Description

Technical Field

[0001] This application relates to the technical field of wind turbines, and in particular to a wind turbine with an internal rotor and a central flange motor. Background Technology

[0002] Currently, electric motors and fans are widely used in industrial, residential, and commercial sectors, especially in ventilation, air conditioning, and refrigeration systems.

[0003] In the existing technology, when installing the internal rotor motor of a traditional fan, the motor is fixed by two wrap-around mounting brackets. The mounting flange of this mounting method is integrated with the front cover. This installation method cannot meet the requirements in some compact structural applications and cannot reduce the size of the cooling fan to reduce space dimensions.

[0004] Regarding the aforementioned technologies, since the mounting flange of the existing internal rotor motor is integrated with the front cover, the connection between the internal rotor motor and the frame through the end flange results in a large space occupation during installation. This installation method cannot meet the requirements in some compact structural applications. Summary of the Invention

[0005] To address the issue that existing internal rotor motors have mounting flanges integrated with the front cover, resulting in a large installation space required for the internal rotor motor to be connected to the frame via the end flange, which is unacceptable in some compact applications, this application provides a fan with a motor featuring an internal rotor central flange.

[0006] This application provides a fan with an internal rotor and a central flange motor, which adopts the following technical solution: A fan with an inner rotor central flange motor includes a frame and an impeller. The inner rotor motor is mounted on the frame, and a flange is located at the center of the inner rotor motor. The flange and the surface of the inner rotor motor are integrally formed. The side of the flange near the frame is connected to the frame. One end of the inner rotor motor containing an output shaft passes through the frame and is connected to the impeller on the side near the inner rotor motor. The side of the impeller near the motor has a recessed groove, and the end of the inner rotor motor containing the output shaft is located in the recessed groove on the impeller.

[0007] By adopting the above technical solution, the flange is set in the middle of the inner rotor motor, allowing the middle part of the inner rotor motor to be mounted on the frame and directly rigidly connected to the frame. This is equivalent to establishing a stable support in the "center of gravity area" of the inner rotor motor. Radial force can be directly transmitted to the frame through the middle flange, avoiding stress concentration at the motor end and significantly reducing the risk of bending deformation of the motor shaft. At the same time, through the design of "the output end of the inner rotor motor is located inside the impeller", the impeller and the output end of the inner rotor motor are located between the frame, realizing the axial integration of "motor-impeller". The output end of the inner rotor motor extends directly into the impeller and drives the impeller to rotate without the need for an additional "motor extension section", which greatly shortens the overall axial length of the fan. The central fixing method of the middle flange further avoids the end support structure occupying extra space, making the overall volume of the fan more compact, saving installation space, and thus reducing the overall space size of the fan.

[0008] Preferably, mounting holes are provided on the surfaces of both the flange and the frame, and bolts for connecting the flange to the frame are provided on the flange. The flange is detachably connected to the frame by the bolts engaging with the mounting holes.

[0009] By adopting the above technical solution, when the inner rotor motor is damaged, the inner rotor motor can be completely removed from the frame simply by unscrewing the bolts on the flange, without disassembling the impeller, thus avoiding the cumbersome process of cutting the flange and re-welding and calibrating after repair, which is required by traditional "welding and fixing".

[0010] Preferably, the number of mounting holes and bolts is several, and the mounting holes and bolts are evenly distributed on the frame and flange.

[0011] By adopting the above technical solution, the design of several bolts essentially increases the "connection redundancy" of the flange. This allows the remaining bolts to temporarily bear the load even if individual bolts become loose, worn, or accidentally damaged due to long-term use. This prevents the entire connection structure from collapsing due to the failure of a single bolt, and significantly improves the safety of equipment operation.

[0012] Preferably, the frame has a through hole on the side near the flange, and the inner rotor motor is connected to the impeller through the through hole.

[0013] By adopting the above technical solution, during assembly, workers can first pass the motor's output shaft through the through hole in the frame, and then fix the motor and frame with bolts on the flange. The "guiding effect" of the through hole allows the motor to quickly find the installation position without repeatedly adjusting the motor angle to align the impeller. Then, simply connect the impeller to the output shaft extending out of the through hole to complete the assembly of the core component. Compared with the process of "fixing the motor first and then painstakingly aligning the output shaft and impeller" when there is no through hole, the assembly time can be shortened by more than 100%, and errors caused by manual alignment can be avoided.

[0014] Preferably, the impeller is located within the frame, and the impeller is rotatably connected to the inner wall of the frame.

[0015] By adopting the above technical solution, the frame simultaneously undertakes the triple functions of "fixing the motor", "supporting the impeller" and "protecting internal components", eliminating the need for an additional independent external support structure for the impeller, reducing the overall number of fan parts, shrinking the overall size of the machine, and making it more suitable for scenarios with limited installation space.

[0016] Preferably, the connection between the impeller and the frame is chamfered, and the frame is provided with a ventilation opening that mates with the impeller.

[0017] By adopting the above technical solution and chamfering the connection between the frame and the impeller, a transition can be made between the impeller and the frame, preventing the edge of the frame from scratching the surface of the impeller when the impeller rotates, thus extending the service life of the impeller.

[0018] Preferably, the impeller includes blades, a cover, and a disc. The cover is located at the ventilation opening of the frame and is connected to the blades. The side of the blades away from the cover is connected to the disc. The recessed groove is provided on the side of the disc near the inner rotor motor, and the disc is fitted onto the surface of the inner rotor motor through the recessed groove.

[0019] By adopting the above technical solution, and by designing the impeller as a combination of a cover, blades, and a disc, individual components on the impeller can be disassembled when damaged, avoiding overall disassembly, thus saving time and material costs for maintenance.

[0020] In summary, this application includes at least one of the following beneficial technical effects: 1. By installing a flange in the middle of the inner rotor motor, the inner rotor motor is mounted on the frame and directly and rigidly connected to the frame. This is equivalent to establishing a stable support in the "center of gravity area" of the inner rotor motor. Radial force can be directly transferred to the frame through the middle flange, avoiding stress concentration at the motor end and significantly reducing the risk of bending deformation of the motor shaft. At the same time, the design of "the output end of the inner rotor motor is located inside the impeller" means that the impeller and the output end of the inner rotor motor are located between the frame, realizing the axial integration of "motor-impeller". The output end of the inner rotor motor extends directly into the impeller and drives the impeller to rotate, which significantly shortens the overall axial length of the fan. The central fixing method of the middle flange further avoids the end support structure occupying extra space, making the overall volume of the fan more compact, saving installation space, and thus reducing the overall space size of the fan. 2. The design of using multiple bolts essentially increases the "connection redundancy" of the flange. This allows the remaining bolts to temporarily bear the load even if some bolts become loose, worn, or accidentally damaged due to long-term use. This prevents the entire connection structure from collapsing due to the failure of a single bolt, thus significantly improving the safety of equipment operation. 3. During assembly, workers can first pass the motor's output shaft through the through hole in the frame, and then fix the motor to the frame with bolts on the flange. The "guiding effect" of the through hole allows the motor to quickly find the installation position without repeatedly adjusting the motor angle to align the impeller. Then, simply connect the impeller to the output shaft extending out of the through hole to complete the assembly of the core component. Compared with the process of "fixing the motor first and then painstakingly aligning the output shaft and impeller" when there is no through hole, the assembly time can be shortened by more than 100%, and errors caused by manual alignment can be avoided. Attached Figure Description

[0021] Figure 1 This is a front perspective view of a fan with an internal rotor and a central flange motor. Figure 2 This is a front sectional view of a fan with an internal rotor and a central flange motor. Figure 3 This is a 3D structural diagram of an internal rotor motor; Figure 4 It is a 3D structural diagram of the frame; Figure 5 This is a three-dimensional structural diagram of the impeller.

[0022] Reference numerals in the attached drawings: 1. Frame; 2. Impeller; 21. Blade; 22. Wheel cover; 23. Wheel disc; 3. Internal rotor motor; 4. Flange; 5. Recessed groove; 6. Bolt; 7. Through hole; 8. Ventilation port; 9. Mounting hole. Detailed Implementation

[0023] The following is in conjunction with the appendix Figure 1 - Appendix Figure 5 This application will be described in further detail.

[0024] This application discloses a fan with an internal rotor central flange motor.

[0025] Reference Figure 1A fan with an inner rotor motor with a central flange includes a frame 1, an impeller 2, and an inner rotor motor 3. The impeller 2 is housed within the frame 1, with both ends rotatably connected to the frame 1. A flange 4 is integrally connected to the center of the inner rotor motor 3. The flange 4 is fixedly connected to the frame 1 near the flange 4 by bolts 6. A recessed groove 5 is formed on the side of the impeller 2 near the inner rotor motor 3, and the recessed groove 5 has a transition treatment. One end of the inner rotor motor 3 containing the output shaft is located within the recessed groove 5, and the output shaft of the inner rotor motor 3 is fixedly connected to the impeller 2. The flange 4 is located in the center of the inner rotor motor 3, allowing the center of the inner rotor motor 3 to be mounted on the frame 1 and directly and rigidly connected to the frame 1, which is equivalent to… A stable support is established in the "center of gravity area" of the inner rotor motor 3. Radial force can be directly transmitted to the frame 1 through the central flange 4, avoiding stress concentration at the motor end and significantly reducing the risk of bending deformation of the motor shaft. At the same time, through the design of "the output end of the inner rotor motor 3 is located inside the impeller 2", the impeller 2 and the output end of the inner rotor motor 3 are located between the frame 1, realizing the axial integration of "motor-impeller 2". The output end of the inner rotor motor 3 extends directly into the impeller 2 and drives the impeller 2 to rotate, which greatly shortens the overall axial length of the fan. The central fixing method of the central flange 4 further avoids the end support structure occupying extra space, making the overall volume of the fan more compact, saving installation space, and thus reducing the overall space size of the fan.

[0026] refer to Figure 2 and Figure 3 Several mounting holes 9 are provided on the surfaces of flange 4 and frame 1, and the mounting holes 9 cooperate with bolts 6, so that flange 4 is fixed to frame 1 by bolts 6, and flange 4 can be disassembled, so that inner rotor motor 3 can be disassembled from frame 1. When inner rotor motor 3 is damaged, only the bolts 6 on flange 4 need to be unscrewed to remove inner rotor motor 3 from frame 1 as a whole, without disassembling impeller 2. This avoids the cumbersome process of cutting flange 4 and re-welding and recalibrating after repair, which is required by traditional "welding fixation". At the same time, the design of several bolts 6 and mounting holes 9 is essentially to increase the "connection redundancy" of flange 4. When individual bolts 6 become loose, worn or accidentally damaged due to long-term use, the remaining bolts 6 can still temporarily bear the load, avoiding the collapse of the entire connection structure due to the failure of a single bolt 6, and greatly improving the safety of equipment operation.

[0027] refer to Figure 4The frame 1 has a through hole 7 on the side near the flange 4, which mates with the inner rotor motor 3. The inner rotor motor 3 is located in the through hole 7, allowing it to connect with the impeller 2. During assembly, the operator can first pass the motor's output shaft through the through hole 7 of the frame 1, and then fix the motor to the frame 1 with bolts 6 on the flange 4. The "guiding effect" of the through hole 7 allows the motor to quickly find its installation position without repeatedly adjusting the motor angle to align with the impeller 2. Then, simply connect the impeller 2 to the output shaft extending out of the through hole 7 to complete the assembly of the core component. Compared with the process of "fixing the motor first and then painstakingly aligning the output shaft and impeller 2" when there is no through hole 7, the assembly time can be shortened by more than 40%, and errors caused by manual alignment can be avoided.

[0028] The connection between the impeller 2 and the frame 1 is chamfered, and the frame 1 is provided with a vent 8 for the impeller 2 to ventilate. This gives the connection between the impeller 2 and the frame 1 a transitional arc. When the impeller 2 and the frame 1 rotate relative to each other, the contact between the impeller 2 and the frame 1 is transitioned, which prevents the edge of the frame 1 from scratching the surface of the impeller 2 when the impeller 2 rotates, thus extending the service life of the impeller 2. At the same time, the vent 8 enables the impeller 2 to work normally and avoids insufficient ventilation, which would affect the normal operation of the impeller 2.

[0029] refer to Figure 5 The impeller 2 includes blades 21, a cover 22, and a disc 23. The blades 21 are detachably connected to the cover 22 and the disc 23, and the blades 21 are located between the disc 23 and the cover 22. The cover 22 is located at the vent 8 and is rotatably connected to the frame 1. The disc 23 is connected to the inner rotor motor 3. The side of the disc 23 closest to the inner rotor motor 3 is recessed inward to form a groove 4 on the impeller 2. The disc 23 is fitted onto the inner rotor motor 3 through the groove 4, so that the end of the inner rotor motor 3 closest to the impeller 2 is located in the groove 4. By designing the impeller 2 as a combination of cover 22, blades 21, and disc 23, when the components on the impeller 2 are damaged, they can be disassembled individually, avoiding overall disassembly, saving time and material costs for maintenance.

[0030] The implementation principle of this application embodiment is as follows: In implementation, the flange 4 and the inner rotor motor 3 are installed on the frame 1 by the bolt 6 cooperating with the mounting hole 9 on the flange 4. The output end of the inner rotor motor 3 enters the frame 1 through the through hole 7 on the frame 1 and enters the recessed groove 5 on the impeller 2 disc 23 to be fixedly connected to the impeller 2. When the inner rotor motor 3 is started, the inner rotor motor 3 drives the impeller 2 to rotate, thereby reducing the overall installation space of the fan and enabling the fan to work. This makes the connection between the inner rotor motor 3 and the impeller 2 more compact, reducing the space. At the same time, it makes the connection between the motor and the frame 1 more stable, reducing the overall stress concentration of the fan at the end of the inner rotor motor 3.

[0031] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A fan with an inner rotor middle flange motor, comprising a frame (1) and an impeller (2), characterized in that, An inner rotor motor (3) is provided on the frame (1). A flange (4) is provided at the middle position of the inner rotor motor (3). The flange (4) and the surface of the inner rotor motor (3) are integrally formed. The side of the flange (4) near the frame (1) is connected to the frame (1). One end of the inner rotor motor (3) containing the output shaft passes through the frame (1) and is connected to the impeller (2) near the side of the inner rotor motor (3). A recessed groove (5) is provided on the side of the impeller (2) near the motor. The end of the inner rotor motor (3) containing the output shaft is located in the recessed groove (5) on the impeller (2).

2. The fan having an inner rotor middle flange motor of claim 1, wherein, Mounting holes (9) are provided on the surfaces of the flange (4) and the frame (1), and bolts (6) for connecting with the frame (1) are provided on the flange (4). The flange (4) is detachably connected to the frame (1) by the bolts (6) and mounting holes (9).

3. The fan having an inner rotor middle flange motor of claim 2, wherein, The number of mounting holes (9) and bolts (6) is several, and the mounting holes (9) and bolts (6) are evenly distributed on the frame (1) and flange (4).

4. The fan having an inner rotor mid-section flange motor of claim 1, wherein, The frame (1) has a through hole (7) on the side near the flange (4), and the inner rotor motor (3) is connected to the impeller (2) through the through hole (7).

5. The blower having an inner rotor mid-flange motor of claim 1, wherein, The impeller (2) is located inside the frame (1), and the impeller (2) is rotatably connected to the inner wall of the frame (1).

6. The blower having an inner rotor mid-flange motor of claim 1, wherein, The connection between the impeller (2) and the frame (1) is chamfered, and the frame (1) is provided with a ventilation opening (8) that cooperates with the impeller (2).

7. The blower having an inner rotor mid-flange motor of claim 1, wherein, The impeller (2) includes blades (21), a cover (22) and a disc (23). The cover (22) is located at the vent (8) of the frame (1). The cover (22) is connected to the blades (21). The side of the blades (21) away from the cover (22) is connected to the disc (23). The recessed groove (5) is provided on the side of the disc (23) near the inner rotor motor (3). The disc (23) is fitted onto the surface of the inner rotor motor (3) through the recessed groove (5).

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