Fan air outlet flange structure

Abstract

The utility model provides a fan air outlet flange structure which comprises a sealing structure, the sealing structure comprises a sealing ring, a combined piece and a rotating shaft, the top and the bottom of the sealing ring are provided with inflation rings, the outer walls of the inflation rings are provided with attaching rings, and the attaching rings are connected with attaching grooves. The flange is reasonable in design, the inflation ring is arranged at the connecting position of the flange body, the fan and other equipment, and after the flange body is connected with the inflation ring, the interior of the inflation ring is inflated, so that the connecting position is sealed; when the fan is started, the air pressure in the flange body is increased through air exhausted from the rear side of the fan, the multiple sealing pieces can be pushed to be opened, the air is exhausted, on the contrary, the sealing pieces are attached to one another, sealing can be achieved, and water vapor is prevented from entering the fan.

Description

Technical Field

[0001] This utility model mainly relates to the field of fans, specifically to a fan outlet flange structure. Background Technology

[0002] With the rapid growth of global demand for clean energy, wind power, as one of the core renewable energy technologies, places higher demands on the reliability, efficiency, and operation and maintenance costs of wind turbines due to its large-scale application. Large wind turbine generators typically operate in complex environments (such as high salt spray at sea, large temperature differences on land, or dusty areas), and the stability of their internal airflow system directly affects energy conversion efficiency. As a core component connecting the wind turbine outlet to downstream pipelines (or tower transition sections), the structural design of the outlet flange must consider high-strength sealing, dynamic load adaptability, and long-term corrosion resistance, making it a crucial link in ensuring the safe operation of the unit.

[0003] During the operation of specific embodiments, the inventors discovered the following defects:

[0004] However, the connecting flange can only be used to connect the fan to other equipment. When the air vent on the back of the fan discharges gas through the cavity inside the connecting flange, a small amount of gas will enter the fan through the connection between the flange and the fan when the fan stops running. When the gas contains water vapor, it will cause damage to the internal parts of the fan when it enters the fan through the connection of the flange.

[0005] It should be noted that the above content falls within the scope of the inventor's technical knowledge. Due to the vast and complex nature of the technical content in this field, the above content of this application does not necessarily constitute prior art. Utility Model Content

[0006] 1. The technical problem to be solved by the utility model:

[0007] This utility model provides a fan outlet flange structure to solve the technical problems existing in the background art.

[0008] 2. Technical Solution:

[0009] To achieve the above objectives, the technical solution provided by this utility model is: a fan outlet flange structure, including a connecting flange structure, wherein a sealing structure is provided inside the connecting flange structure;

[0010] A connecting flange structure includes a flange body, the number of which is set to two, a connecting ring is provided between the two flange bodies, and a fitting groove is provided on the inner side of the flange body.

[0011] A sealing structure includes a sealing ring, a composite plate, and a rotating shaft. The top and bottom of the sealing ring are provided with inflatable rings, and the outer wall of the inflatable ring is provided with a fitting ring, which is connected to a fitting groove.

[0012] Furthermore, the outer wall of the flange body is provided with connecting blocks, and the number of connecting blocks is set to multiple, with multiple connecting blocks arranged in a ring array on the outer wall of the flange body, and mounting holes are opened inside the connecting blocks.

[0013] Furthermore, the outer wall of the flange body is provided with structural holes, and bolt holes are provided on both sides of the outer wall of the flange body. The structural holes and bolt holes are arranged in a ring on the outer wall of the flange body.

[0014] Furthermore, the number of the combined pieces is set to multiple, and the multiple combined pieces are arranged in a ring array inside the sealing ring. Positioning rings are provided at the top and bottom of the combined pieces, and positioning holes are opened on the inner side of the positioning rings.

[0015] Furthermore, the rotating shaft is rotatably connected to the inner wall of the positioning hole, a planar spiral spring is provided between the rotating shaft and the positioning hole, and a sealing plate is provided on the outer wall of the rotating shaft.

[0016] 3. Beneficial effects:

[0017] Compared with the prior art, the technical solution provided by this utility model has the following advantages:

[0018] This utility model reduces the weight of the connecting flange structure by installing a connecting ring between two flange bodies. At the same time, the arc transition between the connecting ring and the flange body is used to increase strength. The flange body is composed of inner and outer layers, thus achieving the effect of lightweighting.

[0019] An air ring is installed at the connection point between the flange body and the fan and other equipment. After the flange body is connected to it, the air ring is inflated to seal the connection point. When the fan starts, the gas discharged from the rear of the fan increases the air pressure inside the flange body, which can push the multiple sealing plates to open and discharge the gas. Conversely, the sealing plates stick together to achieve a seal and prevent water vapor from entering the fan. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0021] Figure 2 This is a three-dimensional structural diagram of the connecting flange structure of this utility model;

[0022] Figure 3 This is a three-dimensional unfolded schematic diagram of the sealing structure of this utility model.

[0023] Figure label:

[0024] 1. Connecting flange structure; 101. Flange body; 102. Connecting block; 103. Mounting hole; 104. Connecting ring; 105. Structural hole; 106. Bolt hole; 107. Fitting groove; 2. Sealing structure; 201. Sealing ring; 202. Inflatable ring; 203. Fitting ring; 204. Assembly piece; 205. Positioning ring; 206. Positioning hole; 207. Rotating shaft; 208. Sealing plate. Detailed Implementation

[0025] To facilitate understanding of this utility model, a more comprehensive description of the utility model will be given below with reference to the accompanying drawings, which show several embodiments of the utility model. However, the utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of the utility model will be more thorough and complete.

[0026] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "page", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and 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 or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0027] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0028] In this utility model, unless otherwise explicitly specified and limited, the terms "installed," "connected," "linked," "fixed," "provided with," and "located in" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances. Example

[0029] See attached document Figure 1-3 A fan outlet flange structure includes a connecting flange structure 1, wherein a sealing structure 2 is provided inside the connecting flange structure 1;

[0030] A connecting flange structure 1 includes two flange bodies 101, with a connecting ring 104 between them. A fitting groove 107 is formed on the inner side of each flange body 101. Multiple connecting blocks 102 are arranged in a circular array on the outer wall of each flange body 101. Mounting holes 103 are formed inside each connecting block 102. Structural holes 105 are formed on the outer wall of each flange body 101. Bolt holes 106 are formed on both sides of the outer wall of each flange body 101. The structural holes 105 and bolt holes 106 are arranged in a ring on the outer wall of the flange body 101. The structural holes 105 adopt a biomimetic shark skin guide groove with a groove depth of 0.3~0.8mm and an asymmetrical corrugated distribution, which reduces the pressure drop loss of airflow stripping eddy intensity by 20%. At the same time, the flange body 101 and the connecting block 102 are composed of two layers, an outer layer of shape memory alloy Ni-Ti spring ring, which is embedded in the circumferential groove of the flange bolt hole and dynamically adjusts the preload according to temperature / pressure changes to compensate for gasket creep. The inner ring is a graphene-modified polytetrafluoroethylene PTFE film, which forms a nanoporous structure through electrospinning process to achieve micro-leakage self-repair.

[0031] Insert the bolt into the bolt hole 106 to connect the bolt to the fan and other equipment. The flange body 101 can be hoisted and installed through the mounting hole 103.

[0032] The sealing structure 2 includes a sealing ring 201, a combination piece 204, and a rotating shaft 207. The sealing ring 201 has an inflatable ring 202 at its top and bottom, and a fitting ring 203 on its outer wall. The fitting ring 203 is connected to a fitting groove 107. Multiple combination pieces 204 are arranged in a circular array inside the sealing ring 201. Positioning rings 205 are provided at the top and bottom of each combination piece 204, and positioning holes 2 are formed on the inner side of each positioning ring 205. 06. The rotating shaft 207 is rotatably connected to the inner wall of the positioning hole 206. A planar spiral spring is provided between the rotating shaft 207 and the positioning hole 206. A sealing plate 208 is provided on the outer wall of the rotating shaft 207. After the flange body 101 is installed, the sealing ring 201 is placed inside the flange body 101, and the fitting ring 203 is connected to the fitting groove 107. Then, gas is injected into the air ring 202 to expand the air ring 202 and seal the connection between the flange body 101 and the fan and other equipment.

[0033] The assembly piece 204 is composed of multiple arc-shaped pieces. The assembly piece 204 is placed inside the air ring 202. There are 6-8 sets of symmetrical arc-shaped modules. The modules are connected by mortise and tenon joints and transverse prestressed locking pins. Each module has a carbon fiber reinforced epoxy resin matrix composite material layer with a thickness of 30%. It forms a gradient interface with the external metal matrix through diffusion welding, achieving a 40% weight reduction and a 25% increase in bending stiffness. The module mating surface is set with a laser-clad wear-resistant alloy coating and a pre-set high-precision positioning guide groove.

[0034] After the fan starts, the air pressure inside the assembly plate 204 increases, causing the gas to push the sealing plate 208 to rotate. The sealing plate 208 drives the rotating shaft 207 to rotate and compresses the planar spiral spring, opening the interior of the assembly plate 204 so that the gas can be discharged.

[0035] The above-described embodiments are merely illustrative of certain implementations of this utility model, and their descriptions are relatively specific and detailed. However, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A fan outlet flange structure, characterized in that: include A connecting flange structure (1) is provided with a sealing structure (2) inside the connecting flange structure (1); The connecting flange structure (1) includes a flange body (101), the number of flange bodies (101) is set to two, a connecting ring (104) is provided between the two flange bodies (101), and a fitting groove (107) is opened on the inner side of the flange body (101). The sealing structure (2) includes a sealing ring (201), a combination piece (204) and a rotating shaft (207). The top and bottom of the sealing ring (201) are provided with an air ring (202), and the outer wall of the air ring (202) is provided with a fitting ring (203). The fitting ring (203) is connected to the fitting groove (107).

2. The fan outlet flange structure according to claim 1, characterized in that: The outer wall of the flange body (101) is provided with a connecting block (102), and the number of the connecting blocks (102) is set to multiple, and the multiple connecting blocks (102) are arranged in a ring on the outer wall of the flange body (101). The connecting block (102) is provided with a mounting hole (103) inside.

3. The fan outlet flange structure according to claim 1, characterized in that: The outer wall of the flange body (101) is provided with structural holes (105), and bolt holes (106) are provided on both sides of the outer wall of the flange body (101). The structural holes (105) and bolt holes (106) are arranged in a ring on the outer wall of the flange body (101).

4. The fan outlet flange structure according to claim 1, characterized in that: The number of the combined pieces (204) is set to multiple, and the multiple combined pieces (204) are arranged in a ring array inside the sealing ring (201). The top and bottom of the combined pieces (204) are provided with positioning rings (205), and the inner side of the positioning rings (205) is provided with positioning holes (206).

5. The fan outlet flange structure according to claim 1, characterized in that: The rotating shaft (207) is rotatably connected to the inner wall of the positioning hole (206). A planar spiral spring is provided between the rotating shaft (207) and the positioning hole (206). A sealing plate (208) is provided on the outer wall of the rotating shaft (207).

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