Centrifugal fan capable of improving air volume

Abstract

The utility model discloses a centrifugal fan that can improve air volume relates to centrifugal fan technical field, including centrifugal fan body and impeller, the centrifugal fan body bottom is connected with drive motor through locking bolt, the output of drive motor is connected with impeller through the shaft coupling and connecting bolt, the centrifugal fan body top welding has the air inlet pipe and servo motor. The centrifugal fan that can improve air volume, through the widening extension of the blade inside impeller and the increase of the air inlet area of air inlet pipe realizes the increase of air intake, effectively improves the use performance of fan, and, is provided with the connecting rod and support rod and the rolling steel ball of reducing the rotation friction that support when rotating ring rotates, is more stable when using, makes the centrifugal fan that can improve air volume solve the problem that traditional impeller structure is difficult to improve fan performance greatly through conventional mode.

Description

Technical Field

[0001] This utility model relates to the field of centrifugal fan technology, specifically a centrifugal fan that can increase air volume. Background Technology

[0002] Centrifugal fans are machines that rely on input mechanical energy to increase gas pressure and discharge gas; they are a type of driven fluid machinery. Centrifugal fans are widely used in many industrial fields, such as ventilation, material handling, and air conditioning. The impeller, as the core component of a centrifugal fan, plays a decisive role in the overall performance of the fan.

[0003] In some practical applications, existing centrifugal fan impellers, due to their width limitations, cannot meet the air volume and pressure requirements under specific operating conditions. For example, in the cement clinker industrial production process, as the production scale expands or the process requirements increase, the fan needs to provide a larger air volume and pressure. However, it is difficult to significantly improve the fan performance through conventional methods using traditional impeller structures. Replacing them directly with a brand new, larger model fan would not only be costly but may also face problems such as insufficient installation space. Utility Model Content

[0004] The purpose of this invention is to provide a centrifugal fan that can increase air volume, thereby solving the problem mentioned in the background art that it is difficult to significantly improve the performance of the fan through conventional methods using traditional impeller structures.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a centrifugal fan that can increase air volume, comprising a centrifugal fan body and an impeller, wherein the bottom of the centrifugal fan body is connected to a drive motor by locking bolts, the output end of the drive motor is connected to the impeller by a coupling and connecting bolts, and an air inlet and a servo motor are welded to the top of the centrifugal fan body;

[0006] The impeller has widened blades welded inside. The top of the air inlet is welded to the connecting ring via a connecting block. The outer side of the connecting ring is rotatably connected to the rotating ring. Multiple guide rods are welded at equal intervals inside the connecting ring. Multiple slide rails are welded at equal intervals inside the rotating ring. Each slide rail has a slide rod inserted inside. Both ends of each slide rod are welded with a shielding block and a guide block, respectively. An adjusting gear ring is welded to the outer side of the rotating ring. One side of the adjusting gear ring meshes with an adjusting gear.

[0007] The inner edge of the widened blade is connected to the outer edge of the impeller. The widened blade extends outward along the radial direction of the impeller, and the outer contour of the widened blade matches the outer contour of the impeller to maintain the continuity of airflow during rotation. The material of the widened blade is the same as that of the impeller to ensure that the overall mechanical properties and corrosion resistance of the impeller are consistent. The thickness of the widened blade is equal to the thickness of the blades inside the impeller to ensure the dynamic balance performance of the impeller during rotation.

[0008] Preferably, the bottom of each of the multiple guide blocks is inserted into the guide rod on the adjacent side, the output end of the servo motor is connected to the adjusting gear through a coupling, and the bottom of the servo motor is connected to the centrifugal fan body through fastening bolts.

[0009] Preferably, the slide rail is arc-shaped, and the insertion dimensions inside the slide rail match the insertion dimensions of the slide rod, so that the slide rail pushes the slide rod to move along the direction indicated by the guide rod.

[0010] Preferably, the insertion dimensions at the bottom of the guide block match the dimensions of the guide rod, and the two sides of the multiple blocking blocks abut against each other.

[0011] Preferably, a connecting rod is welded to the side of each of the multiple slide rails away from the rotating ring, and a support rod is welded to the bottom of the connecting rod.

[0012] Preferably, the bottom of the support rod abuts against the inner wall of the air inlet duct, the connecting rod is used to strengthen the lateral connection between multiple slide rails, and the support rod is used to support the slide rails by the air inlet duct.

[0013] Preferably, rolling steel balls are embedded inside the connecting ring, and the rolling steel balls are used for rotational support between the connecting ring and the rotating ring.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows: This centrifugal fan that can increase air volume increases the air intake volume by widening and extending the blades inside the impeller and increasing the air intake area of ​​the air inlet duct, which effectively improves the performance of the fan. In addition, it is equipped with connecting rods and support rods to support the rotation of the rotating ring and rolling steel balls to reduce rotational friction, making it more stable during use. This solves the problem that it is difficult to significantly improve the performance of the fan through conventional methods using traditional impeller structures.

[0015] 1. This centrifugal fan, which can increase air volume, has widened blades welded inside the impeller using high-precision welding to expand the air intake of the fan body. The shape of the widened blades is optimized according to the fluid dynamics principle of the centrifugal fan, and its cross-sectional shape is consistent with the original blades to ensure smooth gas flow on the blade surface and reduce flow loss. The output end of the servo motor drives the adjusting gear to rotate through the coupling and meshes with the adjusting gear ring, which drives the adjusting gear ring, rotating ring and slide rail to rotate. This pushes the slide rod inside the slide rail to move along the guide rod through the bottom guide block. This centrifugal fan, which can increase air volume, achieves increased air intake by widening and extending the blades inside the impeller and increasing the air intake area of ​​the air inlet, thus effectively improving the performance of the fan.

[0016] 2. This centrifugal fan, which can increase airflow, features welded connecting rods between multiple slide rails to enhance stability during rotation of the rotating ring, slide rails, and baffle blocks. This effectively improves the overall integrity of the slide rails. Additionally, the support rods at the bottom of the connecting rods, which abut against the air inlet, strengthen the support for the connecting rods. Furthermore, the rolling steel balls inside the connecting ring reduce friction between the rotating ring and the connecting ring during rotation. This centrifugal fan, with its connecting rods, support rods, and rolling steel balls that reduce rotational friction, offers greater stability during operation. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the centrifugal fan of this utility model;

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

[0019] Figure 3 This is a schematic diagram of the three-dimensional structure of the impeller of this utility model;

[0020] Figure 4 This is a schematic diagram of the three-dimensional cross-sectional structure of the rotating ring of this utility model;

[0021] Figure 5 This is a three-dimensional structural diagram of the slide bar of this utility model;

[0022] Figure 6 This is a three-dimensional structural diagram of the slide rail of this utility model.

[0023] In the diagram: 1. Centrifugal fan body; 2. Drive motor; 3. Impeller; 301. Widened blades; 4. Air inlet; 401. Connecting ring; 4011. Guide rod; 402. Rotating ring; 4021. Slide rail; 4022. Slide rod; 4023. Blocking block; 4024. Guide block; 403. Adjusting gear ring; 404. Adjusting gear; 405. Servo motor; 5. Connecting rod; 501. Support rod; 502. Rolling steel ball. Detailed Implementation

[0024] 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.

[0025] Please see Figures 1-6 This utility model provides a technical solution: a centrifugal fan that can increase air volume, including a centrifugal fan body 1 and an impeller 3. The bottom of the centrifugal fan body 1 is connected to a drive motor 2 by locking bolts. The output end of the drive motor 2 is connected to the impeller 3 by a coupling and connecting bolts. An air inlet duct 4 and a servo motor 405 are welded to the top of the centrifugal fan body 1.

[0026] The impeller 3 has widened blades 301 welded inside. The top of the air inlet duct 4 is welded to the connecting ring 401 via a connecting block. The outer side of the connecting ring 401 is rotatably connected to the rotating ring 402. Multiple guide rods 4011 are welded at equal intervals inside the connecting ring 401. Multiple slide rails 4021 are welded at equal intervals inside the rotating ring 402. Slide rods 4022 are inserted into each of the slide rails 4021. A blocking block 4023 and a guide block 4024 are welded to both ends of the slide rods 4022 respectively. An adjusting gear ring 403 is welded to the outer side of the rotating ring 402. One side of the adjusting gear ring 403 meshes with an adjusting gear 404.

[0027] The inner edge of the widened blade 301 is connected to the outer edge of the impeller 3. The widened blade 301 extends outward along the radial direction of the impeller 3, and the outer contour of the widened blade 301 is adapted to the outer contour of the impeller 3 to maintain the continuity of airflow during rotation. The material of the widened blade 301 is the same as that of the impeller 3 to ensure that the overall mechanical properties and corrosion resistance of the impeller 3 are consistent. The thickness of the widened blade 301 is equal to the thickness of the blades inside the impeller 3 to ensure the dynamic balance performance of the impeller 3 during rotation.

[0028] The bottom of each of the multiple guide blocks 4024 is inserted into the guide rod 4011 on the adjacent side. The output end of the servo motor 405 is connected to the adjusting gear 404 through a coupling. The bottom of the servo motor 405 is connected to the centrifugal fan body 1 through fastening bolts. The slide rail 4021 is arc-shaped, and the insertion size inside the slide rail 4021 matches the insertion size of the slide rod 4022. The slide rail 4021 pushes the slide rod 4022 to move along the direction indicated by the guide rod 4011. The insertion size of the bottom of the guide block 4024 matches the size of the guide rod 4011. The two sides of the multiple blocking blocks 4023 abut against each other.

[0029] In practice, in order to increase the air intake of the centrifugal fan body 1, the impeller 3 is welded with widened blades 301 by high-precision welding. The shape of the widened blades 301 is optimized according to the fluid dynamics principle of the centrifugal fan, and its cross-sectional shape is consistent with the original blades to ensure smooth flow of gas on the blade surface and reduce flow loss.

[0030] Simultaneously, the servo motor 405, connected to the upper side of the centrifugal fan body 1 by fastening bolts, is started. The output end of the servo motor 405 drives the adjusting gear 404 to rotate through the coupling. When the adjusting gear 404 rotates, its outer side meshes with the adjusting gear ring 403 welded to the outer side of the rotating ring 402, driving the adjusting gear ring 403 and the rotating ring 402 to rotate. When the rotating ring 402 rotates, it drives the slide rail 4021 welded to the inner side to rotate, pushing the slide rod 4022 inserted inside the slide rail 4021 to move along the guide rod 4011 through the guide block 4024 at the bottom, expanding the air intake area of ​​the air inlet duct 4. This centrifugal fan, which can increase the air volume, achieves the increase of air intake by widening and extending the blades inside the impeller 3 and increasing the air intake area of ​​the air inlet duct 4, effectively improving the performance of the fan.

[0031] See Figures 4-6 It is known that a connecting rod 5 is welded to the side of each of the multiple slide rails 4021 away from the rotating ring 402. A support rod 501 is welded to the bottom of the connecting rod 5. The bottom of the support rod 501 abuts against the inner wall of the air inlet duct 4. The connecting rod 5 is used to strengthen the lateral connection between the multiple slide rails 4021. The support rod 501 is used to support the slide rails 4021 by the air inlet duct 4. A rolling steel ball 502 is embedded inside the connecting ring 401. The rolling steel ball 502 is used for the rotational support of the connecting ring 401 and the rotating ring 402.

[0032] In specific implementation, to improve the stability of the rotating ring 402 driving the slide rail 4021 and the baffle block 4023 during rotation and to prevent the slide rail 4021 from shaking due to the negative pressure suction of the impeller 3, connecting rods 5 are welded between multiple slide rails 4021. This can effectively improve the integrity between the slide rails 4021 and reduce the possibility of shaking. At the same time, a support rod 501 is obliquely provided at the bottom of the connecting rod 5 to abut against the air inlet 4, which can strengthen the support of the connecting rod 5, thereby supporting the slide rail 4021 and even the rotating ring 402. Meanwhile, the rolling steel balls 502 inside the connecting ring 401 can reduce the friction between the rotating ring 402 and the connecting ring 401 when rotating. This centrifugal fan, which can improve air volume, is equipped with connecting rods 5 and support rods 501 to support the rotating ring 402 when rotating, as well as rolling steel balls 502 to reduce rotational friction, making it more stable in use.

[0033] In summary, when using this centrifugal fan that can increase air volume, the drive motor 2 connected to one side of the centrifugal fan body 1 via locking bolts is started. The output end of the drive motor 2 drives the impeller 3 to rotate inside the centrifugal fan body 1 through the coupling and connecting bolts, forming a negative pressure. Then, the external gas is drawn into the centrifugal fan body 1 through the air inlet duct 4 and discharged from the opening on one side. The contents not described in detail in this description are existing technologies known to those skilled in the art.

[0034] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A centrifugal fan capable of increasing air volume, comprising a centrifugal fan body (1) and an impeller (3), characterized in that: The bottom of the centrifugal fan body (1) is connected to the drive motor (2) by locking bolts. The output end of the drive motor (2) is connected to the impeller (3) by coupling and connecting bolts. The top of the centrifugal fan body (1) is welded with an air inlet (4) and a servo motor (405). The impeller (3) has widened blades (301) welded inside. The top of the air inlet (4) is welded to the connecting ring (401) via a connecting block. The outer side of the connecting ring (401) is rotatably connected to the rotating ring (402). Multiple guide rods (4011) are welded at equal intervals inside the connecting ring (401). Multiple slide rails (4021) are welded at equal intervals inside the rotating ring (402). Each of the multiple slide rails (4021) has a slide rod (4022) inserted inside. Both ends of the multiple slide rods (4022) are respectively welded with a shielding block (4023) and a guide block (4024). An adjusting gear ring (403) is welded to the outer side of the rotating ring (402). One side of the adjusting gear ring (403) meshes with an adjusting gear (404). The inner edge of the widened blade (301) is connected to the outer edge of the impeller (3). The widened blade (301) extends outward along the radial direction of the impeller (3), and the outer contour of the widened blade (301) is adapted to the outer contour of the impeller (3) to maintain the continuity of airflow during rotation. The material of the widened blade (301) is the same as that of the impeller (3) to ensure that the overall mechanical properties and corrosion resistance of the impeller (3) are consistent. The thickness of the widened blade (301) is equal to the thickness of the blades inside the impeller (3) to ensure the dynamic balance performance of the impeller (3) during rotation.

2. A centrifugal fan capable of increasing air volume according to claim 1, characterized in that: The bottom of each of the multiple guide blocks (4024) is inserted into the guide rod (4011) on the adjacent side. The output end of the servo motor (405) is connected to the adjusting gear (404) through a coupling. The bottom of the servo motor (405) is connected to the centrifugal fan body (1) through fastening bolts.

3. A centrifugal fan capable of increasing air volume according to claim 1, characterized in that: The slide rail (4021) is arc-shaped, and the insertion dimensions inside the slide rail (4021) match the insertion dimensions of the slide rod (4022). The slide rail (4021) pushes the slide rod (4022) to move along the direction indicated by the guide rod (4011).

4. A centrifugal fan capable of increasing air volume according to claim 2, characterized in that: The insertion dimensions at the bottom of the guide block (4024) match the dimensions of the guide rod (4011), and the two sides of the multiple blocking blocks (4023) abut against each other.

5. A centrifugal fan capable of increasing air volume according to claim 3, characterized in that: Each of the multiple slide rails (4021) has a connecting rod (5) welded to the side away from the rotating ring (402), and a support rod (501) is welded to the bottom of the connecting rod (5).

6. A centrifugal fan capable of increasing air volume according to claim 5, characterized in that: The bottom of the support rod (501) abuts against the inner wall of the air inlet tube (4), the connecting rod (5) is used to strengthen the lateral connection between multiple slide rails (4021), and the support rod (501) is used for the air inlet tube (4) to support the slide rails (4021).

7. A centrifugal fan capable of increasing air volume according to claim 1, characterized in that: The connecting ring (401) has a rolling steel ball (502) embedded inside, which is used for the rotational support of the connecting ring (401) and the rotating ring (402).

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