Connecting structure and fan

Abstract

The utility model belongs to the technical field of industrial fan, provide a connecting structure and fan, connecting structure includes: a plurality of first connecting piece, the muffler is provided with the connecting portion, the first connecting piece includes the profiling portion with the appearance of muffler adaptation and is used for the fixed part of the connecting portion pressure, and the profiling portion is in line with the outside wall of muffler, second connecting piece, fixedly set up on the fan and with a plurality of first connecting piece detachable connection. Compared with prior art, the utility model discloses through the connecting structure is decomposed into a plurality of independent first connecting piece and the second connecting piece fixed on the fan, discarded the complex structure of traditional integral type flange butt joint, significantly simplified the design of muffler end, this split type connecting mode does not need to set up complete flange structure on the muffler, not only reduces the manufacturing difficulty and production cost, also promoted the adaptability and maintainability of structure.

Description

Technical Field

[0001] This utility model belongs to the field of industrial fan technology, specifically relating to a connection structure and a fan. Background Technology

[0002] In industrial ventilation, air conditioning systems, and various power equipment, fans, as core power components, often generate significant airflow noise during operation. To effectively reduce noise pollution, silencers are typically connected to the inlet and outlet ends of the fan. Silencers attenuate airflow noise through internal sound-absorbing materials and specific flow channel structures, thereby meeting environmental noise control requirements. However, the design of the connection structure between the silencer and the fan directly affects the equipment installation efficiency, sealing performance, and ease of subsequent maintenance.

[0003] Currently, the most common connection method for fans and silencers in existing technologies uses flange docking and circumferentially distributed bolts for fastening. Specifically, a flange is installed at the end of the fan and the end of the silencer. After the two are aligned, multiple bolts are inserted into the bolt holes one by one along the circumference and tightened to achieve connection and sealing. Although this connection method is simple in structure and widely used, it still has many shortcomings in practical applications.

[0004] First, traditional flange connection structures require a single, integrally welded or molded flange at the end of the silencer housing. This flange must possess sufficient structural strength and machining precision to ensure alignment and sealing with the fan end flange. This not only increases the manufacturing cost and processing steps of the silencer, but also, due to the high rigidity of the flange, it is prone to deformation during transportation and installation, affecting the connection's sealing performance.

[0005] Secondly, during installation, operators need to align the entire silencer with the fan interface and simultaneously align multiple bolt holes distributed circumferentially. Then, they must insert the bolts one by one and apply preload. This process typically requires multiple operators, especially in high-altitude or confined space environments, where the difficulty increases significantly. Due to the large number of bolts distributed around the circumference, misalignment, jamming, or uneven preload can easily occur during installation, leading to poor sealing or localized stress concentration, thus affecting connection reliability.

[0006] Furthermore, in existing connection structures, the connecting flanges of the silencer are usually directly exposed to the external environment, lacking effective protection for the connection points. Under long-term operation, these flanges are susceptible to corrosion or mechanical damage, reducing the service life of the connection structure. At the same time, disassembly and maintenance still require the removal of all bolts one by one, a cumbersome process that severely impacts equipment maintenance efficiency and downtime. Utility Model Content

[0007] The technical problem to be solved by this utility model is to provide a connection structure and a fan in light of the current state of the technology.

[0008] The technical solution adopted by this utility model to solve the above-mentioned technical problem is as follows: a connection structure is proposed for connecting a silencer to a fan, the connection structure comprising:

[0009] Multiple first connectors are provided, and the muffler is provided with a connecting part. The first connector includes a contoured part adapted to the shape of the muffler and a fixing part for pressing the connecting part. The contoured part fits against the outer side wall of the muffler.

[0010] A second connector is fixedly mounted on the fan and detachably connected to a plurality of first connectors. When the second connector is connected to the plurality of first connectors, the connecting portion is clamped and fixed between the second connector and the fixing portion.

[0011] The plurality of first connectors are arranged at circumferential intervals along the muffler, and the projection area of ​​each first connector in the direction toward the second connector at least partially overlaps with the second connector.

[0012] In one of the above-described connection structures, a plurality of the first connectors are non-uniformly distributed along the circumference of the muffler.

[0013] In one of the above-described connection structures, a plurality of the first connectors are distributed circumferentially along the muffler at equal angular intervals.

[0014] In one of the aforementioned connection structures, when all the first connectors are installed in place, they are continuously connected in the circumferential direction to form a complete annular contact surface that is compatible with the second connector.

[0015] In one of the above-mentioned connection structures, the second connector is provided with a plurality of first mounting holes evenly distributed along the circumference, and the first connector is provided with second mounting holes corresponding to the first mounting holes. Fasteners are inserted into the first mounting holes and the second mounting holes to fix the first connector and the second connector.

[0016] In one of the above-described connection structures, the fastener is a bolt; at least one of the first mounting hole and the second mounting hole is a threaded hole that engages with the bolt's thread.

[0017] In one of the above-mentioned connection structures, there are two first connectors, both of which are semi-circular ring structures. The two first connectors together form a complete ring that matches the second connector.

[0018] In one of the above-mentioned connection structures, the second connecting member is an annular flange, and the second connecting member is fixed to the fan by welding.

[0019] In one of the above-described connection structures, the connecting portion is formed by bending the housing end of the muffler outward; when the first connecting member is installed in place, the bent end of the connecting portion does not exceed the clamping end of the fixing portion.

[0020] This utility model also proposes a fan that solves the above-mentioned technical problems, including the aforementioned connection structure.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] (1) By decomposing the connection structure into multiple independent first connecting parts and second connecting parts fixed on the fan, the complex structure of the traditional integral flange docking is eliminated, which significantly simplifies the design of the silencer end. This split connection method does not require a complete flange structure on the silencer, which not only reduces the manufacturing difficulty and production cost, but also improves the adaptability and maintainability of the structure. Multiple first connecting parts are distributed along the circumference, and their axial projection overlaps with the second connecting parts at least partially, ensuring uniform connection force and reliable sealing. In addition, the first connecting parts can be installed one by one, which is flexible and easy to align. It is especially suitable for complex installation environments such as space-constrained or high-altitude operations, which greatly improves assembly efficiency and engineering practicality.

[0023] (2) By setting multiple first connectors to be non-uniformly distributed, the position of the connection point can be flexibly adjusted according to the actual needs of the muffler's structural strength, force distribution, or spatial layout.

[0024] (3) By distributing multiple first connectors at equal angular intervals, the force on each first connector can be uniform, ensuring that the preload is symmetrically distributed along the circumference during the connection process, effectively preventing eccentricity, warping, or sealing failure caused by uneven force. This layout structure is regular, which is convenient for design standardization and mass production, and at the same time, it is beneficial for positioning and alignment during installation, further improving assembly efficiency and connection consistency. Attached Figure Description

[0025] Figure 1 This is a partial view of the silencer of this utility model installed on a fan.

[0026] Figure 2 It is a 3D diagram of a muffler.

[0027] Figure 3 This is a three-dimensional view of the first connector.

[0028] Figure 4 This is a partial view of the wind turbine.

[0029] In the figure, 100 is the fan; 200 is the silencer; 210 is the connecting part; 300 is the connecting structure; 310 is the first connecting piece; 311 is the contour part; 312 is the fixing part; 313 is the second mounting hole; 320 is the second connecting piece; and 321 is the first mounting hole. Detailed Implementation

[0030] 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.

[0031] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0032] like Figures 1 to 4 As shown, this solution mainly focuses on the specific structure of the connection structure 300 and its application on the fan 100.

[0033] A connection structure 300 and a fan 100 are provided for connecting a silencer 200 to the fan 100. The connection structure 300 includes a second connector 320 and a plurality of first connectors 310.

[0034] Specifically, the muffler 200 is provided with a connecting part 210. The first connecting member 310 includes a contoured part 311 that is adapted to the shape of the muffler 200 and a fixing part 312 for pressing the connecting part 210. The contoured part 311 fits against the outer side wall of the muffler 200.

[0035] The second connector 320 is fixedly mounted on the fan 100 and detachably connected to a plurality of first connectors 310. When the second connector 320 is connected to the plurality of first connectors 310, the connecting portion 210 is clamped and fixed between the second connector 320 and the fixing portion 312; wherein...

[0036] Multiple first connectors 310 are arranged at circumferential intervals along the muffler 200, and the projection area of ​​each first connector 310 in the direction toward the second connector 320 at least partially overlaps with the second connector 320.

[0037] When installing the silencer 200, first place the silencer 200 at the end of the fan 100, aligning the connecting part 210 on the silencer 200 with the second connecting member 320 fixed on the fan 100; then, arrange multiple first connecting members 310 sequentially along the circumference of the silencer 200. Once the first connecting member 310 is in place, its contoured part 311 fits tightly against the outer wall of the silencer 200, achieving good positioning and support. Simultaneously, the fixing part 312 and the end faces of the second connecting member 320 press firmly against the upper and lower sides of the connecting part 210 (e.g., ...). Figure 1 (As shown). Finally, by connecting the first connector 310 and the second connector 320, the connecting part 210 is firmly clamped between the two, thereby achieving reliable fixation of the silencer 200 and the fan 100.

[0038] This solution eliminates the complex structure of traditional integral flange connections by decomposing the connection structure 300 into multiple independent first connecting parts 310 and second connecting parts 320 fixed to the fan 100, significantly simplifying the design of the silencer 200 end. This split connection method eliminates the need for a complete flange structure on the silencer 200, reducing manufacturing difficulty and production costs while improving structural adaptability and maintainability. Multiple first connecting parts 310 are distributed circumferentially, and their axial projections at least partially overlap with the second connecting parts 320, ensuring uniform stress distribution and reliable sealing. Furthermore, the first connecting parts 310 can be installed individually, offering flexible operation and easy alignment, making them particularly suitable for complex installation environments such as those with limited space or high-altitude operations, greatly improving assembly efficiency and engineering practicality.

[0039] In one embodiment, a plurality of first connectors 310 are non-uniformly distributed along the circumference of the muffler 200.

[0040] By setting the multiple first connectors 310 in a non-uniform distribution, the positions of the connection points can be flexibly adjusted according to the actual needs of the muffler 200's structural strength, stress distribution, or spatial layout. For example, the density of connection points can be increased in structurally weak areas, and installation can be avoided in areas with spatial obstacles, thereby optimizing the overall stress state, avoiding stress concentration, and improving connection reliability. This design enhances the adaptability and customizability of the connection structure 300, and is particularly suitable for the connection requirements of asymmetrical or irregularly shaped mufflers 200.

[0041] In another embodiment, a plurality of first connectors 310 are distributed circumferentially along the muffler 200 at equal angular intervals.

[0042] By employing an equiangular interval distribution method, the force on each first connector 310 is uniform, ensuring that the preload is symmetrically distributed along the circumference during connection. This effectively prevents problems such as eccentricity, warping, or sealing failure caused by uneven force distribution. This layout structure is regular, facilitating standardized design and mass production. It also benefits positioning and alignment during installation, further improving assembly efficiency and connection consistency.

[0043] With multiple first connectors 310 distributed at equal angular intervals, when all first connectors 310 are installed in place, they are continuously connected in the circumferential direction to form a complete annular contact surface that is compatible with the second connector 320.

[0044] After installation, each of the first connecting parts 310 forms a continuous annular contact surface, achieving surface contact with the second connecting part 320 (such as a flange) rather than point or line contact. This significantly increases the contact area of ​​the connection region, improving connection rigidity and sealing performance. This structure can effectively transfer loads, reduce local stress, prevent vibration, leakage, or fatigue damage caused by gaps, and enhance the overall stability and durability of the connection structure 300.

[0045] It is worth mentioning that the second connector 320 is provided with a plurality of first mounting holes 321 evenly distributed along the circumference, and the first connector 310 is provided with second mounting holes 313 corresponding to the first mounting holes 321. Fasteners are inserted into the first mounting holes 321 and the second mounting holes 313 to fix the first connector 310 and the second connector 320.

[0046] By providing corresponding first mounting holes 321 and second mounting holes 313 on the second connector 320 and the first connector 310 respectively, and using standard fasteners (such as bolts) for connection, the structure is simple, highly versatile, and easy to disassemble and maintain. The circumferentially evenly distributed mounting holes ensure symmetrical application of connection force, which helps guarantee connection concentricity and sealing. This design achieves modular connection, allowing each component to be independently processed and replaced, reducing maintenance costs.

[0047] Preferably, the fastener is a bolt; of the first mounting hole 321 and the second mounting hole 313, at least one is a threaded hole that mates with the bolt thread.

[0048] Bolts are used as fasteners, and threaded holes are provided in the first mounting hole 321 or the second mounting hole 313, eliminating the need for additional nuts during connection and enabling "single-sided fastening". This not only reduces the number of parts and simplifies the assembly process, but is also particularly suitable for installation scenarios with limited space and where operation from both sides is not possible, greatly improving installation convenience and efficiency.

[0049] Furthermore, there are two first connectors 310, both of which are semi-circular ring structures. The two first connectors 310 together form a complete ring that matches the second connector 320.

[0050] The design employs two semi-circular first connectors 310, featuring a symmetrical structure that facilitates separate installation and disassembly. During installation, the two semi-circles are first fitted onto both ends of the silencer 200, then aligned and secured with the second connector 320 at the fan 100 end. This flexible operation is particularly suitable for large or heavy silencers 200, allowing connection without requiring overall alignment. This design balances connection strength with ease of assembly, significantly reducing installation difficulty.

[0051] Preferably, the second connector 320 is an annular flange, and the second connector 320 is fixed to the fan 100 by welding.

[0052] The second connector 320 is designed as a circular flange and fixed to the end of the fan 100 by welding. This structure is robust and reliable, capable of withstanding significant connection loads and operational vibrations. The circular flange is a mature and low-cost manufacturing process, and is compatible with various first connector 310 structures, offering strong versatility. The welded connection ensures permanent fixation between the second connector 320 and the fan 100, preventing loosening and improving the overall system stability.

[0053] It is worth mentioning that the connecting part 210 is formed by bending the end of the housing of the muffler 200 outward; when the first connector 310 is installed in place, the bent end of the connecting part 210 does not exceed the clamping end of the fixing part 312.

[0054] The connecting portion 210 of the muffler 200 is formed by directly bending the end of the housing, eliminating the need for additional welded flanges or connectors. This simplifies the manufacturing process of the muffler 200 and reduces material and processing costs. Simultaneously, the bending structure enhances end strength, which is beneficial for withstanding connection pressure. Limiting the bent end of the connecting portion 210 to not exceeding the clamping end of the fixing portion 312 of the first connector 310 effectively prevents the connecting portion 210 from being exposed, avoiding impact damage, improving appearance and safety, and contributing to a compact sealing structure.

[0055] It should be noted that in this invention, the use of terms such as "first," "second," and "a" is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified. The terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two elements or the interaction between two elements, unless otherwise explicitly specified. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0056] Furthermore, the technical solutions of the various embodiments of the present invention can be combined with each other, but only if they are feasible for those skilled in the art. If the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by the present invention.

[0057] The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

Claims

1. A connection structure for connecting a silencer to a fan, characterized in that, The connection structure includes: Multiple first connectors are provided, and the muffler is provided with a connecting part. The first connector includes a contoured part adapted to the shape of the muffler and a fixing part for pressing the connecting part. The contoured part fits against the outer side wall of the muffler. A second connector is fixedly mounted on the fan and detachably connected to a plurality of first connectors. When the second connector is connected to the plurality of first connectors, the connecting portion is clamped and fixed between the second connector and the fixing portion. The plurality of first connectors are arranged at circumferential intervals along the muffler, and the projection area of ​​each first connector in the direction toward the second connector at least partially overlaps with the second connector.

2. A connection structure according to claim 1, wherein The plurality of the first connectors are non-uniformly distributed along the circumference of the muffler.

3. A connection structure according to claim 1, wherein Multiple first connectors are distributed circumferentially along the muffler at equal angular intervals.

4. A connection structure according to claim 3, wherein When all the first connectors are installed in place, they are continuously connected in the circumferential direction to form a complete annular contact surface that is compatible with the second connector.

5. A connection structure according to claim 1, wherein The second connector has a plurality of first mounting holes evenly distributed along the circumference, and the first connector has a second mounting hole corresponding to the first mounting hole. Fasteners are inserted into the first mounting hole and the second mounting hole to fix the first connector and the second connector.

6. The connection structure as described in claim 5, characterized in that, The fastener is a bolt; at least one of the first mounting hole and the second mounting hole is a threaded hole that mates with the bolt.

7. A connection structure as described in claim 1, characterized in that, The number of the first connectors is two, and both are semi-circular ring structures. The two first connectors together form a complete ring that matches the second connector.

8. The connection structure as described in claim 1, characterized in that, The second connector is an annular flange, and the second connector is fixed to the fan by welding.

9. A connection structure as described in claim 1, characterized in that, The connecting portion is formed by bending the end of the muffler housing outward; when the first connecting member is installed in place, the bent end of the connecting portion does not exceed the clamping end of the fixing portion.

10. A fan, characterized in that, Includes a connection structure as described in any one of claims 1 to 9.

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