Volute structure and fan device

Abstract

The utility model belongs to the technical field of fans, and discloses a volute structure and a fan device.The volute structure comprises a volute body and a volute tongue detachably connected to the volute body, and the volute body comprises a first cover plate, a second cover plate and a side coaming which are connected in a surrounding mode to form an air cavity. The end, located at the air outlet of the air cavity, of the side surrounding plate is provided with at least one stage of installation boss, the installation boss protrudes towards the outer side away from the air cavity, the installation boss comprises a first positioning part and a second positioning part which are arranged in an included angle mode, and the volute tongue is arranged in the air cavity and provided with a first positioning face and a second positioning face. The first positioning face and the second positioning face can abut against the first positioning part and the second positioning part in an attached mode respectively, and the first fastener penetrates through the installation boss and is connected with the volute tongue. According to the volute structure, the volute tongue can be accurately positioned on the volute body and quickly disassembled and assembled on the volute body, the disassembling and assembling actions are not limited by the space of an air cavity, the operation is convenient, the disassembling and assembling efficiency is improved, and the working condition application range of a fan device is wide.

Description

Technical Field

[0001] The utility model relates to the technical field of fans, in particular to a volute structure and a fan device. Background Art

[0002] The fan volute is an important component of the fan. It can collect and guide the medium gas conveyed by the impeller, and cause the medium gas to converge to the air outlet to flow out. The volute tongue structure of the fan volute has a great influence on the noise level and aerodynamic efficiency of the fan. Different shapes and different geometric dimensions of the volute tongue can form different air flow guiding effects. Adjusting the shape and geometric dimensions of the volute tongue according to the applicable working conditions of the fan can achieve the effects of noise reduction and air volume improvement. The integral structure of the volute tongue and the side wall cannot adjust the shape parameters of the volute tongue according to different working conditions, which affects the noise reduction effect and the improvement of aerodynamic efficiency of the fan; while some existing detachable volute tongues are restricted by the curved surface shape of the side wall, which is not convenient for positioning and installation, the position accuracy of the volute tongue after disassembly and assembly is poor, and the disassembly and assembly efficiency is low.

[0003] Therefore, there is an urgent need for a volute structure and a fan device to solve the above problems. Summary of the Utility Model

[0004] The first object of the utility model is to provide a volute structure, which can solve the problems that the existing detachable volute tongue is not convenient for positioning and installation, the position accuracy of the volute tongue after disassembly and assembly is poor, and the disassembly and assembly efficiency is low.

[0005] To achieve this purpose, the utility model adopts the following technical solutions:

[0006] Provide a volute structure, including a volute body and a volute tongue detachably connected to the volute body. The volute body includes a first cover plate, a second cover plate and a side wall. The first cover plate, the second cover plate and the side wall are surrounded and connected to form an air cavity. One end of the side wall at the air outlet of the air cavity has at least one-stage installation boss. The installation boss protrudes outward away from the air cavity. The installation boss includes a first positioning portion and a second positioning portion arranged at an angle. The volute tongue is arranged in the air cavity. The volute tongue has a first positioning surface and a second positioning surface. The first positioning surface and the second positioning surface can respectively fit and abut against the first positioning portion and the second positioning portion. A first fastener passes through the installation boss and connects the volute tongue.

[0007] As a preferred structure of the utility model, the side wall further includes a profile portion connected to one end of the installation boss. An installation groove communicating with the air cavity is formed by surrounding the inner side of the installation boss. The volute tongue is partially embedded in the installation groove, and the outer arc surface of the volute tongue and the inner arc surface of the profile portion are smoothly transitionally connected.

[0008] As a preferred structure of the present utility model, the side wall panel further includes a diffusion portion, the diffusion portion is connected to one end of the mounting boss away from the profile portion, the volute tongue has a third positioning surface, the third positioning surface can be in fitting contact with the diffusion portion, and a second fastener passes through the diffusion portion and connects the volute tongue.

[0009] As a preferred structure of the present utility model, a plurality of the first fasteners are provided, and the plurality of first fasteners are spaced apart on the first positioning portion and / or the second positioning portion.

[0010] As a preferred structure of the present utility model, the first fastener is connected to the first positioning portion or the second positioning portion, and at least three of the plurality of first fasteners are not collinear.

[0011] As a preferred structure of the present utility model, the volute structure further includes a mounting flange, the mounting flange is detachably connected to the volute body and is arranged at the air outlet, the end surfaces of the first positioning portion and the mounting flange are parallel to each other, and the first fastener is connected to the first positioning portion.

[0012] As a preferred structure of the present utility model, the included angle between the first positioning portion and the second positioning portion is α, 120° ≤ α ≤ 150°; and / or,

[0013] The mounting boss is provided with multiple levels, the multiple levels of mounting bosses are sequentially connected along the length direction of the side wall panel, and the volute tongue has a plurality of sequentially connected positioning surfaces to respectively fit and contact the multiple levels of mounting bosses.

[0014] As a preferred structure of the present utility model, the volute structure further includes a buffer and sound-absorbing member that can be flexibly deformed, and the buffer and sound-absorbing member is arranged between the volute body and the volute tongue.

[0015] As a preferred structure of the present utility model, the buffer and sound-absorbing member extends along the first positioning portion and the second positioning portion and can cover the first positioning surface and the second positioning surface; and / or,

[0016] The material of the buffer and sound-absorbing member is silica gel.

[0017] The second object of the present utility model is to provide a fan device, and the volute structure thereof can solve the problems that the existing detachable volute tongue is not convenient for positioning and installation, the position accuracy after disassembly and assembly of the volute tongue is poor, and the disassembly and assembly efficiency is low.

[0018] To achieve this purpose, the present utility model adopts the following technical solutions:

[0019] Provided is a fan device, including the volute structure as described above. The fan device further includes blades, and the blades are rotatably arranged in the air cavity of the volute mechanism.

[0020] Advantages of the present utility model:

[0021] For the volute structure provided by the present utility model, one end of the side enclosure plate located at the air outlet of the air cavity has at least one-stage mounting boss. The mounting boss protrudes outward away from the air cavity, and the mounting boss includes a first positioning portion and a second positioning portion arranged at an angle. The volute tongue is arranged in the air cavity, and the volute tongue has a first positioning surface and a second positioning surface. The first positioning surface and the second positioning surface can respectively fit and abut against the first positioning portion and the second positioning portion, thereby effectively forming abutting and limiting of the volute tongue and ensuring the accurate position of the volute tongue. The first positioning portion and the second positioning portion are arranged at an angle and are not restricted by the curved surface of the side enclosure plate. When the first positioning surface fits and abuts against the first positioning portion and the second positioning surface fits and abuts against the second positioning portion, it indicates that the position of the volute tongue on the volute body is accurate. At this time, use a first fastener to pass through the mounting boss and connect the volute tongue, and the installation of the volute tongue on the volute body can be completed. The first fastener is installed from the outside of the volute structure, and the installation is not restricted by the space of the air cavity, which is convenient for operation and greatly improves the disassembly and assembly efficiency.

[0022] The fan device provided by the present utility model has the above-mentioned volute structure, which can realize the precise positioning and rapid disassembly and assembly of the volute tongue and the volute body. The disassembly and assembly actions are not restricted by the space of the air cavity, which is convenient for operation and greatly improves the disassembly and assembly efficiency, making the working condition application range of the fan device relatively wide. Description of the drawings

[0023] Figure 1 is a schematic structural diagram of the volute structure provided by an embodiment of the present utility model;

[0024] Figure 2 is an exploded schematic structural diagram of the volute structure provided by an embodiment of the present utility model;

[0025] Figure 3 is the front view of the structure of the volute structure provided by an embodiment of the present utility model Figure 1 ;

[0026] Figure 4 is the front view of the structure of the volute structure provided by an embodiment of the present utility model Figure 2 .

[0027] In the figure:

[0028] 1. Volute body; 11. First cover plate; 12. Second cover plate; 13. Side wall plate; 131. Mounting boss; 1311. First positioning portion; 1312. Second positioning portion; 1313. Mounting groove; 132. Profile portion; 1321. Inner arc surface; 133. Diffusion portion; 14. Air cavity; 141. Air outlet

[0029] 2. Volute tongue; 21. First positioning surface; 22. Second positioning surface; 23. Outer arc surface; 24. Third positioning surface

[0030] 3. Mounting flange; 31. End face Detailed implementation manners

[0031] The present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present utility model, rather than limiting the present utility model. Additionally, it should be noted that for the sake of description, only the parts related to the present utility model rather than all the structures are shown in the drawings.

[0032] In the description of the present utility model, unless otherwise clearly defined and limited, the terms "connected", "connected to", and "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0033] In the present utility model, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features therebetween. Moreover, the first feature being "above", "over", and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "under", and "beneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.

[0034] In the description of this embodiment, the orientation or positional relationships such as "above", "below", "left", and "right" are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meanings.

[0035] The fan volute is an important component of the fan. It can collect and guide the medium gas conveyed by the impeller, and converge the medium gas to the air outlet for outflow. The volute tongue structure of the fan volute has a great influence on the noise level and aerodynamic efficiency of the fan. Different shapes and geometric dimensions of the volute tongue can form different air flow guiding effects. Adjusting the shape and geometric dimensions of the volute tongue according to the applicable working conditions of the fan can achieve the effects of noise reduction and air volume improvement. The integrated structure of the volute tongue and the side wall plate cannot adjust the shape parameters of the volute tongue according to different working conditions, which affects the noise reduction effect and aerodynamic efficiency improvement of the fan; while some existing detachable volute tongues are restricted by the curved surface shape of the side wall plate, which is not convenient for positioning and installation. The position accuracy of the volute tongue after disassembly and assembly is poor, and the disassembly and assembly efficiency is low.

[0036] To solve the above problems, an embodiment of the present utility model provides a volute structure. As Figure 1 and Figure 2 shown, the volute structure provided by the embodiment of the present utility model includes a volute body 1 and a volute tongue 2 detachably connected to the volute body 1. The volute body 1 includes a first cover plate 11, a second cover plate 12 and a side wall plate 13. The first cover plate 11, the second cover plate 12 and the side wall plate 13 are enclosed and connected to form an air cavity 14. One end of the side wall plate 13 located at the air outlet 141 of the air cavity 14 has at least one-stage installation boss 131. The installation boss 131 protrudes outward away from the air cavity 14. The installation boss 131 includes a first positioning portion 1311 and a second positioning portion 1312 arranged at an angle. The volute tongue 2 is arranged in the air cavity 14. The volute tongue 2 has a first positioning surface 21 and a second positioning surface 22. The first positioning surface 21 and the second positioning surface 22 can respectively fit and abut against the first positioning portion 1311 and the second positioning portion 1312, so as to effectively form an abutting limit on the volute tongue 2 and ensure the accurate position of the volute tongue 2. The first positioning portion 1311 and the second positioning portion 1312 are arranged at an angle and are not restricted by the curved surface of the side wall plate 13. When the first positioning surface 21 fits and abuts against the first positioning portion 1311 and the second positioning surface 22 fits and abuts against the second positioning portion 1312, it indicates that the position of the volute tongue 2 on the volute body 1 is accurate. At this time, a first fastener is used to pass through the installation boss 131 and connect the volute tongue 2, and the installation of the volute tongue 2 on the volute body 1 can be completed. The first fastener is installed from the outside of the volute structure. During installation, it is not restricted by the space of the air cavity 14, and the operation is convenient, greatly improving the disassembly and assembly efficiency.

[0037] The first fastener can be a screw (not shown in the figure). Corresponding threaded holes are opened on both the installation boss 131 and the volute tongue 2, and the threaded hole on the installation boss 131 penetrates through. The screw is sequentially threadedly connected to the threaded hole on the installation boss 131 and the threaded hole of the volute tongue 2.

[0038] The side wall 13 forms a profiled line portion 132 at one end of the mounting boss 131. The profiled line portion 132 is used to form an air duct surrounding the circumference of the blade. Since the mounting boss 131 protrudes outward, an installation groove 1313 communicating with the ventilation cavity 14 is formed by surrounding the inner side of the mounting boss 131. The volute tongue 2 is partially embedded in the installation groove 1313, and the outer arc surface 23 of the volute tongue 2 and the inner arc surface 1321 of the profiled line portion 132 are smoothly transitionally connected, so that there is no gap and height difference at the connection between the volute tongue 2 and the profiled line portion 132, ensuring the smoothness of the air duct, reducing the flow resistance of the air flow, and further reducing the working noise.

[0039] The side wall 13 further includes a diffusion portion 133 surrounding the air outlet 141. The diffusion portion 133 forms a straight air duct to conduct the air flow flowing out of the air outlet 141. The diffusion portion 133 is connected to one end of the mounting boss 131 away from the profiled line portion 132. The volute tongue 2 has a third positioning surface 24, and the third positioning surface 24 can be attached and abutted against the diffusion portion 133, and the third positioning surface 24 further increases the reliability of positioning the volute tongue 2. A second fastener (not shown in the figure) passes through the diffusion portion 133 and connects the volute tongue 2, increasing the connection structure between the volute casing body 1 and the volute tongue 2, and making the connection between the volute casing body 1 and the volute tongue 2 more reliable.

[0040] The second fastener can be a screw (not shown in the figure). Threaded holes are correspondingly provided on both the diffusion portion 133 and the third positioning surface 24, and the threaded hole on the diffusion portion 133 is provided through. The screw is sequentially threadedly connected to the threaded hole on the diffusion portion 133 and the threaded hole on the third positioning surface 24 to achieve detachable connection. The second fastener can be disassembled and assembled from the outside of the volute casing body 1, which is more convenient.

[0041] In order to increase the connection reliability, a plurality of first fasteners are provided, and the plurality of first fasteners are spaced on the first positioning portion 1311 and / or the second positioning portion 1312. That is, the first fastener can pass through the first positioning portion 1311 to realize the connection with the volute tongue 2, or the first fastener can pass through the second positioning portion 1312 to realize the connection with the volute tongue 2, or threaded holes are provided on both the first positioning portion 1311 and the second positioning portion 1312, and different first fasteners pass through the first positioning portion 1311 and the second positioning portion 1312 to realize the connection with the volute tongue 2. In the last case, since the first positioning portion 1311 and the second positioning portion 1312 are arranged at an angle, the axial directions of different first fasteners are different, which can improve the connection accuracy of the volute tongue 2.

[0042] When multiple first fasteners are connected to the volute tongue 2 only through the first positioning portion 1311 or the second positioning portion 1312, at least three of the multiple first fasteners are arranged non-collinearly. The three non-collinearly arranged first fasteners can apply relatively balanced forces to the volute tongue 2 during the installation process, avoiding torsion and warping of the volute tongue 2, and the volute tongue 2 can always remain in contact with the first positioning portion 1311 and the second positioning portion 1312.

[0043] To facilitate the connection of external structures, the volute structure further includes a mounting flange 3. The mounting flange 3 is detachably connected to the volute body 1 and is arranged at the air outlet 141. Through the mounting flange 3, the installation and fixation of the fan device can be realized. The end face 31 of the first positioning portion 1311 and the mounting flange 3 are parallel to each other, and the first fastener is connected to the first positioning portion 1311. Since the end face 31 of the mounting flange 3 is usually arranged horizontally or vertically, the first positioning portion 1311 also forms a horizontal plane or a vertical plane; compared with an inclined plane, the horizontal plane and the vertical plane are convenient for tools to apply force, so that tools can be used to quickly disassemble and assemble the first fastener on the first positioning portion 1311.

[0044] In an embodiment, the included angle between the first positioning portion 1311 and the second positioning portion 1312 is α, and 120° ≤ α ≤ 150°, which can avoid the formation of sharp protrusions on the outer surface of the mounting boss 131 on the side wall 13.

[0045] When multiple levels of mounting bosses 131 are provided on the side wall 13, the multiple levels of mounting bosses 131 are sequentially connected along the length direction of the side wall 13, that is, the first positioning portion 1311 of the mounting boss 131 is connected to the second positioning portion 1312 of the adjacent mounting boss 131. The multiple levels of mounting bosses 131 can be sequentially arranged along the extending direction of the profile portion 132, as Figure 3 shown; or, the multiple levels of mounting bosses 131 are sequentially arranged along the extending direction of the diffusing portion 133, as Figure 4 shown. Correspondingly, the volute tongue 2 has multiple sequentially connected positioning surfaces to respectively fit and abut against the multiple levels of mounting bosses 131, forming multiple embedded settings.

[0046] In an embodiment, in order to reduce the risk of loosening of the first fastener, the volute structure further includes a buffer and sound-absorbing member that can be flexibly deformed. The buffer and sound-absorbing member is arranged between the volute body 1 and the volute tongue 2. The first fastener sequentially penetrates the volute body 1 and the buffer and sound-absorbing member. Due to the flexible deformation characteristic of the buffer and sound-absorbing member, the pre-tightening force of the first fastener can be increased, reducing the risk of loosening of the first fastener. If the first fastener loosens after long-term use, it will cause the loosening of the volute tongue 2, and it is easy to generate noise due to air flow impact during the working process, while the buffer and sound-absorbing member can provide buffering to achieve the effect of reducing noise.

[0047] The buffer and sound-absorbing member extends along the first positioning portion 1311 and the second positioning portion 1312 and can cover the first positioning surface 21 and the second positioning surface 22. Therefore, the buffer and sound-absorbing member can also compensate for machining errors, eliminate the installation gap between the volute body 1 and the volute tongue 2 caused by insufficient machining accuracy, and provide effective buffering.

[0048] Preferably, the material of the buffer and sound-absorbing member is silica gel, which has good high-temperature resistance and weather resistance, and high chemical stability, meeting the usage requirements under harsh working conditions.

[0049] The embodiment of the present utility model further provides a fan device. The fan device includes the above-mentioned volute structure. The fan device further includes blades rotatably disposed in the air cavity 14 of the volute mechanism. Through the above-mentioned volute structure, the fan device realizes the precise positioning and quick disassembly and assembly of the volute tongue 2 and the volute body 1. The side enclosure plate 13 of the volute structure has a mounting boss 131. The mounting boss 131 includes a first positioning portion 1311 and a second positioning portion 1312 arranged at an angle. The first positioning surface 21 and the second positioning surface 22 of the volute tongue 2 can respectively fit and abut against the first positioning portion 1311 and the second positioning portion 1312 to ensure position accuracy. Using a first fastener to pass through the mounting boss 131 from the outside of the volute structure and connect the volute tongue 2 can complete the installation of the volute tongue 2 on the volute body 1. The disassembly and assembly actions are not restricted by the space of the air cavity 14, the operation is convenient, and the disassembly and assembly efficiency is greatly improved. The fan device has a wide range of applicable working conditions.

[0050] Obviously, the above embodiments of the present utility model are merely examples for clearly explaining the present utility model and are not limitations on the implementation manners of the present utility model. For those of ordinary skill in the art, various obvious changes, re-adjustments and substitutions can be made without departing from the protection scope of the present utility model. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present utility model shall be included within the protection scope of the claims of the present utility model.

Claims

1. The volute structure is characterized by: The invention comprises a volute body (1) and a volute tongue (2) detachably connected to the volute body (1); the volute body (1) comprises a first cover plate (11), a second cover plate (12) and a side panel (13); the first cover plate (11), the second cover plate (12) and the side panel (13) are mutually connected to form an air cavity (14); one end of the side panel (13) located at an air outlet (141) of the air cavity (14) comprises at least one mounting boss (131); the mounting boss (131) faces away from the air cavity (14). The outer side of the mounting boss (131) includes a first positioning portion (1311) and a second positioning portion (1312) arranged at an angle, the volute tongue (2) is arranged in the wind cavity (14), the volute tongue (2) has a first positioning surface (21) and a second positioning surface (22), the first positioning surface (21) and the second positioning surface (22) can respectively fit and abut the first positioning portion (1311) and the second positioning portion (1312), and a first fastener passes through the mounting boss (131) and is connected to the volute tongue (2).

2. The volute structure according to claim 1, characterized in that: The side panel (13) further comprises a profile portion (132) connected to one end of the mounting boss (131); the inner side of the mounting boss (131) is surrounded by a mounting groove (1313) connected to the air cavity (14); the volute tongue (2) is partially embedded in the mounting groove (1313); and the outer arc surface (23) of the volute tongue (2) and the inner arc surface (1321) of the profile portion (132) are smoothly transitionally connected.

3. The volute structure according to claim 2, characterized in that: The side panel (13) also includes a diffuser (133) surrounding the air outlet (141), the diffuser (133) being connected to an end of the mounting boss (131) away from the profile portion (132), the snail tongue (2) having a third positioning surface (24), the third positioning surface (24) being able to fit in contact with the diffuser (133), and a second fastener passing through the diffuser (133) and connected to the snail tongue (2).

4. The volute structure according to claim 1, characterized in that: A plurality of the first fasteners are provided, and the plurality of the first fasteners are arranged at intervals on the first positioning portion (1311) and / or the second positioning portion (1312).

5. The volute structure according to claim 4, characterized in that: The first fastener is connected to the first positioning portion (1311) or the second positioning portion (1312), and at least three of the plurality of first fasteners are not arranged in a colinear manner.

6. The volute structure according to any one of claims 1 to 5, characterized in that: The volute structure also includes a mounting flange (3), which is detachably connected to the volute body (1) and arranged at the air outlet (141), the first positioning portion (1311) and the end surface (31) of the mounting flange (3) are parallel to each other, and the first fastener is connected to the first positioning portion (1311).

7. The volute structure according to any one of claims 1 to 5, characterized in that: The angle between the first positioning portion (1311) and the second positioning portion (1312) is α, 120°≤α≤150°; and / or, The mounting boss (131) is provided with multiple stages, and the multiple stages of the mounting boss (131) are connected in sequence along the length direction of the side panel (13), and the snail tongue (2) has multiple positioning surfaces connected in sequence to respectively fit and abut against the multiple stages of the mounting boss (131).

8. The volute structure according to any one of claims 1 to 5, characterized in that: The volute structure also includes a flexibly deformable buffer silencer, which is arranged between the volute body (1) and the volute tongue (2).

9. The volute structure according to claim 8, characterized in that: The buffer silencer extends along the first positioning portion (1311) and the second positioning portion (1312), and is capable of covering the first positioning surface (21) and the second positioning surface (22); and / or, The material of the buffer silencer is silica gel.

10. A fan device, characterized in that: Comprising the volute structure according to any one of claims 1 to 9, the fan device further comprises blades, and the blades are rotatably arranged in the wind cavity (14) of the volute mechanism.

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