Integrated sealing protection fan

Abstract

The utility model provides a kind of integrated sealing protective fan, belong to fan technical field.It solves the technical problems that the parts inside the existing fan are prone to rust in corrosive gas, etc.This integrated sealing protective fan, including air duct, motor, blade and support, motor includes fixedly connected upper cover, lower cover, stator assembly and rotor assembly, stator assembly is fixed between upper cover and lower cover, rotor assembly is fixedly connected with shaft, shaft extends lower cover and is fixedly connected with blade, the outside of upper cover is protruded with fixed column, support includes fixed rod and fixed disc, one end of fixed rod is fixedly connected with air duct, the other end is fixedly connected with fixed disc, fixed disc is provided with fixed hole, fixed column passes through fixed hole and is fixedly connected by fastener.The utility model has the effect of isolating corrosive gas, improving the protection level of motor internal components, enhancing the stability and convenience of motor installation, and reducing the vibration of fan structure.

Description

Technical Field

[0001] This utility model belongs to the field of fan technology, specifically referring to an integrated sealed and protected fan. Background Technology

[0002] As a widely used gas conveying device, the reliability and lifespan of the motor, the core drive component of a blower, are crucial. In harsh environments with corrosive gases, such as chemical plants, electroplating plants, and wastewater treatment plants, traditional blower motors face severe challenges. In existing technologies, the motor is typically directly connected and fixed to the blower's support frame through its casing. This connection method often requires drilling holes in the motor casing or installing additional connectors, which not only increases the complexity of manufacturing and assembly but, more importantly, compromises the integrity of the motor casing, allowing corrosive gases to easily penetrate the motor through these gaps. Once the internal components of the motor are exposed to corrosive gases, they are highly susceptible to corrosion and failure, leading to decreased motor performance, increased noise and vibration, or even complete damage, significantly shortening the blower's lifespan.

[0003] Furthermore, the existing connection structure between the motor and the support frame, as well as the internal structure of the motor itself, may not effectively suppress vibrations during motor operation. This vibration not only transmits throughout the entire fan structure, generating noise and affecting equipment stability, but long-term operation can also lead to loosening of connectors and accelerated bearing wear, further reducing equipment reliability. Simultaneously, core components such as the stator and rotor lack effective protective encapsulation against corrosive environments; their protective performance relies primarily on the sealing of the outer casing. When the casing has connection holes or poor sealing, the protective effect is significantly reduced. Therefore, there is an urgent need for a fan structure that can effectively isolate corrosive gases, improve the protection level of internal motor components, enhance motor stability and ease of installation, and reduce operational vibrations. Summary of the Invention

[0004] To address the shortcomings of existing technologies, the purpose of this invention is to provide an integrated sealed protective fan. The technical problem this invention aims to solve is how to effectively isolate corrosive gases, improve the protection level of internal motor components, enhance motor stability, and facilitate installation.

[0005] The objective of this utility model can be achieved through the following technical solution: an integrated sealed protective fan, comprising a fan casing, a motor, and blades. A support is fixedly connected inside the fan casing. The motor includes a fixedly connected upper cover and lower cover, with a receiving cavity between the upper and lower covers. A stator assembly and a rotor assembly rotating relative to the stator assembly are disposed within the receiving cavity. The stator assembly is fixed between the upper and lower covers. A rotating shaft is fixedly connected to the rotor assembly. One end of the rotating shaft is rotatably fixed to the upper cover via a bearing, and the other end is rotatably fixed to the lower cover via a bearing. The rotating shaft extends out of the lower cover and is fixedly connected to the blades. At least two fixing posts protrude from the outer side of the upper cover. The support includes a fixing rod and a fixing plate. One end of the fixing rod is fixedly connected to the fan casing, and the other end is fixedly connected to the fixing plate. The fixing plate has at least two fixing holes. The fixing posts pass through the fixing holes and are fixedly connected by fasteners. Two to six fixing posts can be selected, and there are correspondingly two to six fixing holes.

[0006] This design integrates the fixing column and the top cover into a single unit, forming a closed cavity. The fixing column, located on the outside of the top cover, secures the top cover and the support frame together to fix the entire motor. The motor then drives the blades to rotate. The closed cavity effectively protects the rotor assembly, stator assembly, and bearings inside the motor from corrosive gases, extending the motor's lifespan. The support frame includes a fixing rod and a fixing plate, which are welded together. The fixing rod is also welded to the fan casing. A pad is fixed between the fixing plate and the top cover. After the top and bottom covers are fixed, they are secured together to the fixing plate, ensuring the overall stability of the machine and reducing motor vibration. The integrated molding of the top cover and fixing column forms a unified sealed protective fixing structure, providing stable fixation without the need for drilling holes in the top cover, ensuring the sealing performance of the top cover, and facilitating the installation and fixing of the fan.

[0007] Furthermore, the stator assembly includes a stator body and a stator sleeve that encloses and fixes the stator body. A fixing groove is provided between the upper cover and the lower cover, and the stator sleeve is fixedly embedded in the fixing groove. The stator body is injection molded, that is, the stator body is placed into a mold and then injection molded to form an enclosed stator assembly, which reduces the corrosion of corrosive gases and extends the service life of the motor.

[0008] Furthermore, the upper cover has an upper stepped portion, and the lower cover has a lower stepped portion. A gasket is fixedly connected between the ends of the upper and lower stepped portions, and the upper and lower stepped portions and the gasket together form a fixing groove. The gasket is located between the ends of the upper and lower stepped portions, that is, in the middle of the outer periphery of the stator sleeve. When the upper and lower covers are fixed, the gasket can not only seal but also reduce the axial vibration of the stator assembly, improve the efficiency of the motor, and make the fan operate more stably.

[0009] Furthermore, the rotor assembly includes a rotor body and a rotor sleeve that encloses the rotor body. The rotating shaft includes a first fixing part and a second fixing part. The rotor sleeve is snapped and fixed between the first fixing part and the second fixing part. The rotor assembly and the rotating shaft are integrally injection molded. The rotating shaft and rotor body are not molded separately in the mold before the rotor sleeve is formed, thus making them integrally molded, reducing rotating parts, and allowing the rotor assembly to better drive the rotating shaft to rotate.

[0010] Furthermore, an upper fixing seat is provided inside the upper cover, and the first bearing is fixedly disposed between the upper fixing seat and the first fixing part. A lower fixing seat is provided inside the lower cover, and the second bearing is fixedly disposed between the lower fixing seat and the second fixing part. The lower fixing seat has a through hole in the middle, the rotating shaft extends out of the through hole, and a sealing element is provided between the rotating shaft and the through hole.

[0011] Furthermore, the rotating shaft is provided with a first mounting part, a first fixing part, a second mounting part, a second fixing part, a third mounting part, and a third fixing part from left to right. The diameters of the first fixing part and the second fixing part are both larger than those of the first mounting part, the second mounting part, the third mounting part, and the third fixing part. The first bearing is fixedly mounted on the first mounting part, the rotor sleeve is fixed on the second mounting part, the second bearing is fixedly mounted on the third mounting part, and the blades are fixedly connected to the third fixing part by fixing bolts.

[0012] Compared with existing technologies, the technical advantages of this utility model are as follows: First, the integrated design of the upper cover and the fixing column eliminates leakage points caused by drilling or welding additional connecting parts required for installation in traditional motor housings, ensuring the integrity and high sealing performance of the cavity formed by the upper and lower covers. The sealed cavity effectively isolates external corrosive gases from entering the internal channels of the motor. Through injection molding, the stator body is encased in a stator sleeve, the rotor body is encased in a rotor sleeve, and a seal is formed between the shaft and the through hole in the lower cover, creating double-sealed protection for the stator and rotor assemblies. This reduces the risk of corrosion of internal components, thereby significantly extending the service life of the motor and the entire fan under harsh operating conditions.

[0013] II. The integrated fixing column and bracket fixing plate are rigidly connected by fasteners, combined with the stable connection between the bracket and the air duct, forming a motor fixing system with high rigidity and a short transmission path. Inside the motor, the stator sleeve is firmly embedded in the fixing groove formed by the upper step, lower step, and gaskets. This design not only ensures reliable axial fixation, but the gaskets also effectively absorb and reduce axial vibration of the stator assembly. The rotor assembly and shaft are integrally injection molded, reducing the connection gap and potential imbalance between rotating parts, and improving the dynamic balance of the rotor system. These features work together to significantly reduce the vibration amplitude of the motor during operation, reduce the transmission of vibration to the air duct, thereby reducing operating noise and improving the overall stability and long-term reliability of the machine.

[0014] Third, the top cover and fixing column are integrally molded, eliminating the complex steps of drilling holes in the motor housing and installing independent connecting parts as in traditional methods, thus eliminating the risk of seal damage that may result from these steps. This design allows the motor to function as a single module; simply aligning the fixing column of its top cover with the fixing holes on the bracket mounting plate and tightening it with fasteners such as nuts completes the main installation and fixing work, greatly simplifying the assembly process. The integrated structure also reduces the number of parts, improving production efficiency and assembly consistency. Therefore, while ensuring and even enhancing sealing and stability, it significantly improves the ease and efficiency of fan installation. Attached Figure Description

[0015] Figure 1 This is a cross-sectional view of the present invention.

[0016] Figure 2 This is an enlarged view of section A of this utility model.

[0017] Figure 3 This is a cross-sectional view of the present invention after removing the air duct and blades.

[0018] Drawing number markings: 1. Air duct; 2. Bracket; 201. Fixing rod; 202. Fixing plate; 203. Fixing hole; 3. Top cover; 301. Upper step; 302. Fixing column; 303. Upper fixing seat; 4. Blade; 5. Bottom cover; 501. Lower step; 502. Lower fixing seat; 503. Through hole; 6. Receiving cavity; 7. Stator assembly; 701. Stator body; 702. Stator sleeve; 8. Rotor assembly; 801. Rotor body; 802. Rotor sleeve; 9. Shaft; 901. First mounting part; 902. First fixing part; 903. Second mounting part; 904. Second fixing part; 905. Third mounting part; 906. Third fixing part; 10. Bearing one; 11. Bearing two; 12. Fastener; 13. Fixing groove; 14. Seal; 15. Fixing bolt; 16. Gasket. Detailed Implementation

[0019] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0020] It should be noted that the descriptions of "up", "down", "left", "right", "top", "bottom", etc. in this utility model are defined based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device must be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0021] according to Figures 1 to 3 As shown, the integrated sealed protective fan includes a duct 1, a motor, and blades 4. The motor includes an upper cover 3 and a lower cover 5 that are fixedly connected. There is a receiving cavity 6 between the upper cover 3 and the lower cover 5. A stator assembly 7 and a rotor assembly 8 that rotates relative to the stator assembly 7 are arranged in the receiving cavity 6. The stator assembly 7 is fixed between the upper cover 3 and the lower cover 5. A rotating shaft 9 is fixedly connected to the rotor assembly 8. One end of the rotating shaft 9 is rotatably fixed to the upper cover 3 through a bearing 10, and the other end is rotatably fixed to the lower cover 5 through a bearing 11. The rotating shaft 9 extends out of the lower cover 5 and is fixedly connected to the blades 4.

[0022] The stator assembly 7 includes a stator body 701 and a stator sleeve 702 that encloses and fixes the stator body 701. A fixing groove 13 is provided between the upper cover 3 and the lower cover 5, and the stator sleeve 702 is fixedly embedded in the fixing groove 13. The stator body 701 is injection molded, that is, the stator body 701 is placed into a mold and then injection molded to form the enclosed stator assembly 7, which reduces the corrosion of corrosive gases and extends the service life of the motor. The upper cover 3 is provided with an upper step portion 301, and the lower cover 5 is provided with a lower step portion 501. A gasket 16 is fixedly connected between the end of the upper step portion 301 and the end of the lower step portion 501. The upper step portion 301, the lower step portion 501, and the gasket 16 together form the fixing groove 13. The gasket 16 is located between the end of the upper step 301 and the end of the lower step 501, which is the middle of the outer periphery of the stator sleeve 702. When the upper cover 3 and the lower cover 5 are fixed, the gasket 16 can not only seal but also reduce the axial vibration of the stator assembly 7, improve the efficiency of the motor, and make the fan operate more stably.

[0023] The rotor assembly 8 includes a rotor body 801 and a rotor sleeve 802 that encloses the rotor body 801. The rotating shaft 9 includes a first fixing part 902 and a second fixing part 904. The rotor sleeve 802 is fixedly engaged between the first fixing part 902 and the second fixing part 904. The rotor assembly 8 and the rotating shaft 9 are integrally injection molded. To prevent the rotor sleeve 802 from being formed separately in the mold, the rotating shaft 9 and the rotor body 801 are integrally molded, reducing rotating parts and allowing the rotor assembly 8 to better drive the rotating shaft 9 to rotate. An upper fixing seat 303 is provided inside the upper cover 3. A bearing 10 is fixedly disposed between the upper fixing seat 303 and the first fixing part 902. A lower fixing seat 502 is provided inside the lower cover 5. A bearing 11 is fixedly disposed between the lower fixing seat 502 and the second fixing part 904. The lower fixing seat 502 has a through hole 503 in the middle. The rotating shaft 9 extends out of the through hole 503. A sealing element 14 is provided between the rotating shaft 9 and the through hole 503. The rotating shaft 9 is provided with a first mounting part 901, a first fixing part 902, a second mounting part 903, a second fixing part 904, a third mounting part 905, and a third fixing part 906 from left to right. The diameters of the first fixing part 902 and the second fixing part 904 are larger than those of the first mounting part 901, the second mounting part 903, the third mounting part 905, and the third fixing part 906. Bearing 10 is fixedly mounted on the first mounting part 901, rotor sleeve 802 is fixed on the second mounting part 903, bearing 11 is fixedly mounted on the third mounting part 905, and blade 4 is fixedly connected to the third fixing part 906 by fixing bolt 15.

[0024] A bracket 2 is fixedly connected inside the air duct 1. At least two fixing posts 302 protrude from the outer side of the upper cover 3. The bracket 2 includes a fixing rod 201 and a fixing plate 202. The fixing rod 201 includes a radial rod located radially to the fixing plate 202 and an inclined rod forming an angle with the radial rod. One end of the fixing rod 201 is fixedly connected to the air duct 1, and the other end is fixedly connected to the fixing plate 202. The fixing plate 202 is provided with at least two fixing holes 203. The fixing posts 302 pass through the fixing holes 203 and are fixedly connected by fasteners 12. Two to six fixing posts 302 can be selected, and there are also two to six corresponding fixing holes 203.

[0025] The fixing column 302 and the upper cover 3 are integrally formed. The upper cover 3 and the lower cover 5 form a closed receiving cavity 6. The fixing column 302 is located on the outside of the upper cover 3. The upper cover 3 and the bracket 2 are fixed together by the fixing column 302 to fix the entire motor. The motor drives the blades 4 to rotate. The closed receiving cavity 6 can effectively protect the rotor assembly 8, stator assembly 7 and bearings inside the motor from corrosive gas corrosion, extending the service life of the motor. The bracket 2 includes a fixing rod 201 and a fixing plate 202. The fixing rod 201 and the fixing plate 202 are welded and fixed. The fixing rod 201 is welded and fixed to the air duct 1. A pad is fixed between the fixing plate 202 and the upper cover 3. After the upper cover 3 and the lower cover 5 are fixed together, they are fixed to the fixing plate 202, ensuring the stability of the whole machine and reducing motor vibration. The upper cover 3 and the fixing column 302 are integrally formed to form an integrated sealed protective fixing structure, which can not only fix stably but also eliminate the need for drilling holes in the upper cover 3 for installation, ensuring the sealing performance of the upper cover 3 and facilitating the installation and fixing of the fan.

[0026] The integrated design of the upper cover 3 and the fixing column 302 eliminates leakage points caused by drilling or welding additional connecting parts required for installation in traditional motor housings, ensuring the integrity and high sealing performance of the receiving cavity 6 formed by the upper cover 3 and the lower cover 5. The sealed receiving cavity 6 effectively isolates external corrosive gases from entering the internal channels of the motor. Through injection molding, the stator body 701 is wrapped by the stator sleeve 702, the rotor body 801 is wrapped by the rotor sleeve 802, and the seal 14 between the shaft 9 and the through hole 503 of the lower cover 5 forms a double sealing protection for the stator assembly 7 and the rotor assembly 8. This reduces the risk of corrosion of internal components, thereby significantly extending the service life of the motor and the entire fan under harsh operating conditions.

[0027] The integrated fixing column 302 and the fixing plate 202 of the bracket 2 are rigidly connected by fasteners 12. Combined with the stable connection between the bracket 2 and the air duct 1, this forms a motor fixing system with high rigidity and a short transmission path. Inside the motor, the stator sleeve 702 is firmly embedded in the fixing groove 13 formed by the upper step portion 301, the lower step portion 501, and the gasket 16. This design not only ensures reliable axial fixation, but also allows the gasket 16 to effectively absorb and reduce axial vibration of the stator assembly 7. The rotor assembly 8 and the rotating shaft 9 are integrally injection molded, reducing the connection gap and potential imbalance between rotating parts and improving the dynamic balance of the rotor system. These features work together to significantly reduce the vibration amplitude of the motor during operation, reduce the transmission of vibration to the air duct 1, thereby reducing operating noise and improving the overall stability and long-term reliability of the machine.

[0028] The top cover 3 and the fixing post 302 are integrally formed, eliminating the complex process of drilling holes in the motor housing and installing independent connecting parts as in traditional methods, and eliminating the risk of seal damage that may result from these processes. This design allows the motor to be treated as a single module; the main installation and fixing work can be completed simply by aligning the fixing post 302 of the top cover 3 with the fixing hole 203 on the fixing plate 202 of the bracket 2 and tightening it with fasteners 12 such as nuts, greatly simplifying the assembly process. The integrated structure also reduces the number of parts, improving production efficiency and assembly consistency. Therefore, while ensuring or even enhancing sealing and stability, the ease and efficiency of fan installation are significantly improved.

[0029] The above embodiments are merely preferred embodiments of the present utility model and are not intended to limit the scope of protection of the present utility model. Therefore, all equivalent changes made to the structure, shape, and principle of the present utility model should be covered within the scope of protection defined by the claims of the present utility model.

Claims

1. An integrated sealed protective fan, comprising a duct (1), a motor, and blades (4), wherein a bracket (2) is fixedly connected inside the duct (1), characterized in that: The motor includes an upper cover (3) and a lower cover (5) fixedly connected. A receiving cavity (6) is provided between the upper cover (3) and the lower cover (5). A stator assembly (7) and a rotor assembly (8) rotating relative to the stator assembly (7) are disposed in the receiving cavity (6). The stator assembly (7) is fixed between the upper cover (3) and the lower cover (5). A rotating shaft (9) is fixedly connected to the rotor assembly (8). One end of the rotating shaft (9) is rotatably fixed to the upper cover (3) through a bearing (10), and the other end is rotatably fixed to the lower cover (5) through a bearing (11). The rotating shaft (9) extends out of the lower cover (5) and is fixedly connected to the blade (4). At least two fixing posts (302) protrude from the outer side of the upper cover (3). The bracket (2) includes a fixing rod (201) and a fixing plate (202). One end of the fixing rod (201) is fixedly connected to the air duct (1), and the other end is fixedly connected to the fixing plate (202). At least two fixing holes (203) are provided on the fixing plate (202). The fixing posts (302) pass through the fixing holes (203) and are fixedly connected by fasteners (12).

2. The integrated sealed protective fan according to claim 1, characterized in that: The stator assembly (7) includes a stator body (701) and a stator sleeve (702) that wraps and fixes the stator body (701). A fixing groove (13) is provided between the upper cover (3) and the lower cover (5), and the stator sleeve (702) is fixedly embedded in the fixing groove (13).

3. The integrated sealed protective fan according to claim 2, characterized in that: The upper cover (3) is provided with an upper step (301), and the lower cover (5) is provided with a lower step (501). A gasket (16) is fixedly connected between the end of the upper step (301) and the end of the lower step (501). The upper step (301), the lower step (501) and the gasket (16) together form a fixing groove (13).

4. The integrated sealed protective fan according to any one of claims 1 to 3, characterized in that: The rotor assembly (8) includes a rotor body (801) and a rotor sleeve (802) that wraps around the rotor body (801). The rotating shaft (9) includes a first fixing part (902) and a second fixing part (904). The rotor sleeve (802) is fixed between the first fixing part (902) and the second fixing part (904). The rotor assembly (8) and the rotating shaft (9) are integrally injection molded.

5. The integrated sealed protective fan according to claim 4, characterized in that: The upper cover (3) is provided with an upper fixing seat (303), the first bearing (10) is fixedly disposed between the upper fixing seat (303) and the first fixing part (902), the lower cover (5) is provided with a lower fixing seat (502), the second bearing (11) is fixedly disposed between the lower fixing seat (502) and the second fixing part (904), the lower fixing seat (502) has a through hole (503) in the middle, the rotating shaft (9) extends out of the through hole (503), and a sealing element (14) is provided between the rotating shaft (9) and the through hole (503).

6. The integrated sealed protective fan according to claim 5, characterized in that: The rotating shaft (9) is provided with a first mounting part (901), a first fixing part (902), a second mounting part (903), a second fixing part (904), a third mounting part (905), and a third fixing part (906) from left to right. The diameters of the first fixing part (902) and the second fixing part (904) are larger than those of the first mounting part (901), the second mounting part (903), the third mounting part (905), and the third fixing part (906). The first bearing (10) is fixedly mounted on the first mounting part (901), the rotor sleeve (802) is fixed on the second mounting part (903), the second bearing (11) is fixedly mounted on the third mounting part (905), and the blade (4) is fixedly connected to the third fixing part (906) by a fixing bolt (15).

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