Noise reduction assembly, fuel tank and vehicle

Abstract

The invention provides a noise reduction assembly, a fuel tank and a vehicle, and belongs to the technical field of vehicles. The noise reduction assembly comprises a supporting column, a first fin and a second fin. The supporting column is in a hollow column shape. The first ends of the first fins and the first ends of the second fins are connected to the two opposite sides, in the first direction, of the supporting column correspondingly. The first direction is parallel to the diameter direction of the supporting column; the second ends of the first fins and the second ends of the second fins are suspended and bent towards the two ends in the second direction, so that the projections of the first fins and the second fins in the axial direction of the supporting column are arc-shaped, and the central angles alpha corresponding to the arc shapes are within the target value range. The second direction is perpendicular to the first direction and the axial direction of the supporting column. According to the noise reduction assembly, impact of fluid can be reduced, abnormal sound generated when the fluid flaps the flat wall face is reduced, and the effect of reducing noise is achieved.

Description

Technical Field

[0001] The present application relates to the field of vehicle technology, and in particular to a noise reduction component, a fuel tank and a vehicle. Background Art

[0002] With the development of vehicle technology, people have higher and higher requirements for vehicle driving comfort. Among them, the noise level inside the car has a great impact on driving comfort.

[0003] In the related technology, whether it is a fuel vehicle, a hybrid electric vehicle or an extended-range power vehicle, a fuel tank is required. When the vehicle is braked to stop, reversed into a garage, etc., the fuel in the fuel tank has inertia due to acceleration, and the generated waves will hit the fuel tank wall, producing a "bang bang" sound, or a "gurgling" sound through the cavity structure on the upper surface of the fuel tank. These abnormal sounds may be transmitted to the passenger compartment, affecting the comfort of the vehicle. Summary of the invention

[0004] The present application provides a noise reduction component, a fuel tank and a vehicle, which can solve the problem of abnormal noise generated by gasoline in the fuel tank due to inertia.

[0005] The technical solution is as follows:

[0006] In one aspect, a noise reduction assembly is provided, the noise reduction assembly comprising: a support column, a first fin and a second fin;

[0007] The support column is a hollow column;

[0008] The first end of the first fin and the first end of the second fin are respectively connected to opposite sides of the support column along a first direction; the first direction is parallel to the diameter direction of the support column;

[0009] The second end of the first fin and the second end of the second fin are respectively suspended and bent toward two ends of the second direction, so that the projections of the first fin and the second fin along the axial direction of the support column are respectively arc-shaped, and the central angle α corresponding to the arc shape meets the target value range;

[0010] The second direction is perpendicular to the first direction and the axial direction of the support column.

[0011] In some embodiments, the noise reduction assembly is configured such that when the fluid moves along the second direction, the first fin and the second fin can block the fluid, so that the fluid forms vortices on surfaces of the first fin and the second fin.

[0012] In some embodiments, positioning flanges are respectively provided at both axial ends of the support column, a positioning hole is provided in the middle of the positioning flange, the positioning flange is used to abut against two opposite inner walls of the fuel tank respectively, and the positioning hole is used to insert the positioning column on the corresponding inner wall of the fuel tank.

[0013] In some embodiments, at least one positioning notch is provided on the edge of the positioning flange, at least one positioning protrusion is provided on the inner wall of the fuel tank, and the at least one positioning notch and the at least one positioning protrusion are cooperatively connected.

[0014] In some embodiments, the target value range of the central angle α corresponding to the arc shape is 30°-90°.

[0015] In some embodiments, a plurality of flow holes are respectively provided on the first fin and the second fin, and each of the flow holes penetrates the corresponding first fin or the second fin along the second direction.

[0016] In some embodiments, a leakage gap is respectively provided between the first end of the first fin and the first end of the second fin and the surface of the support column.

[0017] On the other hand, a fuel tank is provided, comprising the noise reduction assembly described in the present application.

[0018] In some embodiments, the fuel tank is made of plastic material and is formed by injection molding; the noise reduction component is preset in the injection molding cavity, and the top and bottom ends of the support column are respectively provided with support spikes, the height of the support spikes is equal to the wall thickness of the fuel tank, and the melting point of the support spikes is lower than that of the plastic material;

[0019] The support spikes are used to support and fix the noise reduction component in the injection molding cavity, and melt during the injection molding process, so that the top and bottom ends of the support column are respectively filled with the plastic material.

[0020] On the other hand, a vehicle is provided, the vehicle comprising the noise reduction assembly described in the present application, or using the fuel tank described in the present application.

[0021] The beneficial effects of the technical solution provided by this application include at least:

[0022] The noise reduction component of the present application is provided with a first fin and a second fin on opposite sides of the support component, and the first fin and the second fin are bent respectively, and the axial projections of the first fin and the second fin on the support column are arc-shaped. When the fluid hits the first fin or the second fin, the first fin or the second fin can use the arc surface to guide the fluid, and the surfaces of the first fin and the second fin form a vortex, which disturbs the fluid, buffers the impact energy of the fluid, reduces the impact of the fluid, and reduces the abnormal sound generated when the fluid hits the flat wall, thereby reducing the noise. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0024] Figure 1 is a schematic diagram of the structure of the noise reduction component provided in an embodiment of the present application;

[0025] Figure 2 is a structural cross-sectional view of a noise reduction component provided in an embodiment of the present application;

[0026] Figure 3 is a structural cross-sectional view of a noise reduction component provided by another embodiment of the present application;

[0027] Figure 4 is a schematic diagram of the connection between the noise reduction assembly and the fuel tank provided in an embodiment of the present application;

[0028] Figure 5 is a schematic diagram of the connection between a noise reduction component and a fuel tank provided by another embodiment of the present application;

[0029] Figure 6 is a structural schematic diagram of a noise reduction component provided in another embodiment of the present application;

[0030] Figure 7 It is a schematic diagram of the preset structure of the noise reduction component in the injection molding cavity during the injection molding process of the fuel tank provided in an embodiment of the present application.

[0031] The reference numerals in the figures represent respectively:

[0032] a, first direction; b, second direction;

[0033] 1. Support column;

[0034] 11. Positioning flange; 111. Positioning notch; 12. Positioning hole;

[0035] 2. The first fin;

[0036] 21. Flow hole;

[0037] 3. Second fin;

[0038] 4. Positioning column;

[0039] 5. Positioning protrusion;

[0040] 6. Positioning groove;

[0041] 7. Leakage gap;

[0042] 8. Support buckle;

[0043] 9. Injection cavity;

[0044] 10. Support spikes. DETAILED DESCRIPTION

[0045] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present application. Instead, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0046] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate directions or positional relationships based on the attached Figure 1 The orientation or positional relationship shown is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0047] Unless otherwise defined, all technical terms used in the embodiments of the present application have the same meanings as commonly understood by those of ordinary skill in the art.

[0048] In order to make the objectives, technical solutions and advantages of the present application clearer, the implementation methods of the present application will be further described in detail below with reference to the accompanying drawings.

[0049] On the one hand, combined with Figure 1 As shown, this embodiment provides a noise reduction component, which includes: a support column 1, a first fin 2 and a second fin 3.

[0050] The support column 1 is a hollow column; the first end of the first fin 2 and the first end of the second fin 3 are respectively connected to opposite sides of the support column 1 along a first direction a; the first direction a is parallel to the diameter direction of the support column 1.

[0051] The second end of the first fin 2 and the second end of the second fin 3 are respectively suspended and bent toward the two ends of the second direction b, so that the projections of the first fin 2 and the second fin 3 along the axial direction of the support column 1 are respectively arc-shaped, and the central angle α corresponding to the arc shape meets the target value range; the second direction b is respectively perpendicular to the first direction a and the axial direction of the support column 1.

[0052] In the noise reduction component of the present embodiment, the first fin 2 and the second fin 3 are respectively provided on the opposite sides of the support component, and the first fin 2 and the second fin 3 are respectively bent, and the axial projections of the first fin 2 and the second fin 3 on the support column 1 are arc-shaped. When the fluid impacts the first fin 2 or the second fin 3, the first fin 2 or the second fin 3 can use the arc surface to guide the fluid, and the surfaces of the first fin 2 and the second fin 3 form a vortex, which disturbs the fluid, buffers the impact energy of the fluid, reduces the impact of the fluid, and reduces the abnormal sound generated when the fluid hits the flat wall, thereby reducing the noise.

[0053] In some possible implementations, the support column 1 is a hollow cylinder. The hollow support column 1 has a smaller mass, which is helpful to reduce the mass of the noise reduction component.

[0054] The cylindrical support column 1 has a smooth surface and can produce the same guiding effect as the first fin 2 or the second fin 3 to prevent abnormal noise from being generated when the airflow impacts the support column 1 .

[0055] In some other possible implementations, the support column 1 , the first fin 2 , and the second fin 3 are all made of stainless steel.

[0056] In some other possible implementations, the first fin 2 and the second fin 3 are both sheet metal products.

[0057] Combination Figure 2 As shown, in some embodiments, the noise reduction component is configured so that when the fluid moves along the second direction b, the first fin 2 and the second fin 3 can block the fluid, so that the fluid forms vortices on the surfaces of the first fin 2 and the second fin 3 .

[0058] In this embodiment, when the noise reduction component is in use, the second direction b is arranged to coincide with the movement direction of the fluid, so that when the fluid moves along the second direction b and impacts the first fin 2 and the second fin 3, since the first fin 2 and the second fin 3 are arc-shaped, when the fluid impacts the arc surface, a vortex will be formed along the arc surface, which can reduce its own impact energy on the one hand, and on the other hand, the vortex can buffer the fluid behind and absorb the kinetic energy of the fluid, thereby reducing the impact energy of the fluid, so that no noise will be generated when the fluid impacts the box wall.

[0059] In some possible implementations, reference Figure 2 As shown, the center O1 corresponding to the axial projection of the first fin 2 along the support column 1, and the center O2 corresponding to the axial projection of the second fin 3 along the support column 1 are respectively located on both sides of the support column 1 along the first direction a, and on both sides of the support column 1 along the second direction b.

[0060] Through the above arrangement, the first fin 2 and the second fin 3 can be respectively a concave structure facing the fluid impact direction and a convex structure facing the fluid impact direction, and can buffer the fluid respectively.

[0061] In some other possible implementations, refer to Figure 3 As shown, the center O1 corresponding to the axial projection of the first fin 2 along the support column 1, and the center O2 corresponding to the axial projection of the second fin 3 along the support column 1 are respectively located on both sides of the support column 1 along the second direction b, and the connecting line between the center O1 and the center O2 intersects with the axis of the support column 1.

[0062] Through the above arrangement, the first fin 2 and the second fin 3 can form an integral S-shaped flow-guiding structure to guide and buffer the impacting fluid as a whole toward one side.

[0063] Combination Figure 1 and Figure 4 As shown, in some embodiments, positioning flanges 11 are respectively provided at both axial ends of the support column 1, and a positioning hole 12 is provided in the middle of the positioning flange 11. The positioning flange 11 is used to abut against two opposite inner walls of the fuel tank respectively, and the positioning hole 12 is used to insert the positioning column 4 on the corresponding inner wall of the fuel tank.

[0064] Through the above arrangement, positioning flanges 11 are respectively provided at both axial ends of the support column 1. The positioning flanges 11 can be used to support and fix the support column 1 on two opposite inner walls of the fuel tank. The first fin 2 and the second fin 3 are arranged on two opposite inner walls of the fuel tank. When the fuel in the fuel tank is impacted by inertia flowing in the fuel tank, the first fin 2 and the second fin 3 can buffer the fuel and reduce the abnormal noise caused by the fuel impacting the fuel tank wall.

[0065] In some possible implementations, the support column 1 is arranged in the vertical direction, the positioning flange 11 at the top of the support column 1 abuts against the top inner wall of the fuel tank, the positioning flange 11 at the bottom of the support column 1 abuts against the bottom inner wall of the fuel tank, and the projections of the first fin 2 and the second fin 3 in the vertical direction are arc-shaped.

[0066] Combination Figure 5 As shown, in some embodiments, at least one positioning notch 111 is provided on the edge of the positioning flange 11, at least one positioning protrusion 5 is provided on the inner wall of the fuel tank, and at least one positioning notch 111 and at least one positioning protrusion 5 are cooperatively connected.

[0067] Through the above arrangement, the positioning flange 11 can utilize the positioning notch 111 to cooperate with the positioning protrusion 5 on the inner wall of the fuel tank, so as to realize the circumferential positioning of the positioning flange 11 and the support column 1, so that the noise reduction component can be fixedly limited in the direction where the second direction b coincides with the direction of fluid movement, thereby ensuring that the fluid can smoothly impact the first fin 2 and the second fin 3, buffering the impact energy of the fluid and reducing the abnormal sound of fluid impact in the fuel tank.

[0068] In some possible implementations, the number of positioning notches 111 and positioning protrusions 5 is multiple, the multiple positioning notches 111 are arranged at intervals along the circumferential edge of the positioning flange 11, the positions of the positioning protrusions 5 correspond one-to-one to the positioning notches 111, and the multiple positioning protrusions 5 are arranged in a ring shape.

[0069] In some other possible implementations, a positioning groove 6 is provided on the inner wall of the fuel tank. The shape of the positioning groove 6 is the same as that of the positioning flange 11 , and the positioning flange 11 can be inserted into the positioning groove 6 .

[0070] The positioning protrusion 5 is located on the circumferential inner wall of the positioning groove 6 . When the positioning flange 11 is inserted into the positioning groove 6 , the positioning protrusion 5 is snap-fitted with the positioning notch 111 in a one-to-one correspondence.

[0071] In some possible implementations, on the two positioning flanges 11 located at the axial ends of the support column 1 , one of the positioning flanges 11 may be provided with a positioning notch 111 , or both of the positioning flanges 11 may be provided with a positioning notch 111 .

[0072] For example, when the support column 1 is arranged in the vertical direction, the positioning flange 11 at the bottom end of the support column 1 is further provided with a positioning notch 111, and a positioning groove 6 and a positioning protrusion 5 are provided on the bottom inner wall of the fuel tank.

[0073] In some embodiments, the target value range of the central angle α corresponding to the arc shape is 30°-90°.

[0074] When the central angle α corresponding to the arc shape formed by the projection of the first fin 2 and the second fin 3 along the axial direction of the support shaft meets the above-mentioned distinguishing range, the first fin 2 and the second fin 3 have better buffering and noise reduction effects.

[0075] In some possible implementations, the central angle α corresponding to the arc shape is 30°, 40°, 50°, 60°, 70°, 80°, 90°, etc.

[0076] Combination Figure 1 As shown, in some embodiments, a plurality of flow holes 21 are respectively provided on the first fin 2 and the second fin 3 , and each flow hole 21 penetrates the corresponding first fin 2 or the corresponding second fin 3 along the second direction b.

[0077] Through the above arrangement, when the fluid impacts the first fin 2 and the second fin 3, a part of the fluid can pass through the first fin 2 through the flow hole 21 to disperse the fluid. The flow hole 21 can be used to continuously dilute the vortex formed by the fluid impacting the first fin 2 and the second fin 3, and the vortex energy is gradually consumed, thereby avoiding large drop fluctuations in the liquid level in the fuel tank caused by the vortex.

[0078] If the vortex energy in the fuel tank is large, it will cause large fluctuations in the liquid level in the fuel tank. A low local liquid level may cause a reduction in the fuel supply to the fuel tank, while a high local liquid level may clog the fuel tank's ventilation valve.

[0079] Therefore, the energy of the vortex is gradually consumed by utilizing the multiple flow holes 21 on the first fin 2 and the second fin 3, which is beneficial to maintaining the liquid level balance in the fuel tank and avoiding the reduction of fuel supply or the blockage of the ventilation valve.

[0080] In some possible implementations, a plurality of flow holes 21 are arranged in an array on the first fin 2 or the second fin 3 .

[0081] Combination Figure 6 As shown, in some embodiments, a liquid leakage gap 7 is respectively provided between the first end of the first fin 2 and the first end of the second fin 3 and the surface of the support column 1 .

[0082] Through the above arrangement, leakage gaps 7 are respectively provided between the first fin 2 and the second fin 3 and the surface of the support column 1, so that when the fluid guided by the first fin 2 and the second fin 3 flows to the position of the support column 1, it can pass through the leakage gap 7 to avoid the fluid directly hitting the surface of the support column 1.

[0083] In some possible implementations, the first end of the first fin 2 and the support column 1 are connected via a support buckle 8, and the second end of the second fin 3 and the support column 1 are connected via a support buckle 8. The support buckle 8 can realize quick snap-on assembly, which is beneficial to improving the assembly efficiency of the first fin 2 and the second fin 3.

[0084] In some possible implementations, combined with Figure 3 , when the center O1 corresponding to the axial projection of the first fin 2 along the support column 1 and the center O2 corresponding to the axial projection of the second fin 3 along the support column 1 are respectively located on both sides of the support column 1 along the second direction b, and the connecting line of the center O1 and the center O2 intersects with the axis of the support column 1, and the first fin 2 and the second fin 3 form an integral S-shaped flow guide structure, the first fin 2 and the second fin 3 can guide the impacting fluid to one side as a whole for buffering. At this time, the leakage gap 7 between the first fin 2 and the second fin 3 and the surface of the support column 1 can be used to further absorb the energy of the vortex and improve the noise reduction effect of the noise reduction component.

[0085] On the other hand, the present embodiment provides a fuel tank, which includes the noise reduction component of the present application.

[0086] The fuel tank of this embodiment adopts the noise reduction component of the present application and has all the beneficial technical effects of all the embodiments herein.

[0087] In some possible implementations, the number of noise reduction components arranged in the fuel tank is not limited to one, and may be two, three or more noise reduction components. Multiple noise reduction components may be arranged in parallel and in an array in the fuel tank, and the second directions b corresponding to the multiple noise reduction components may be parallel or non-parallel, so that the noise of fuel flowing in a single direction may be reduced, or the noise of fuel flowing in multiple different directions may be reduced.

[0088] The overall size and number of noise reduction components can be determined based on the volume and shape of the fuel tank.

[0089] Combination Figure 7 As shown, in some embodiments, the fuel tank is made of plastic material and is processed by injection molding; the noise reduction component is preset in the injection molding cavity 9, and the top and bottom ends of the support column 1 are respectively provided with support spikes 10, and the height of the support spikes 10 is equal to the wall thickness of the fuel tank, and the melting point of the support spikes 10 is lower than that of the plastic material.

[0090] The support spikes 10 are used to support and fix the noise reduction component in the injection molding cavity 9, and melt during the injection molding process, so that the top and bottom ends of the support column 1 are filled with plastic material respectively.

[0091] Through the above arrangement, when a fuel tank made of plastic is used, during the injection molding process of the fuel tank, the noise reduction component can be suspended in the injection cavity 9 by using the support spikes 10. When liquid plastic is injected into the injection cavity 9, since the melting point of the plastic is higher than the support spikes 10, the support spikes 10 will gradually melt, and the space at both ends of the support column 1 will be filled with liquid plastic, which will form the inner wall of the fuel tank after cooling. After the fuel tank is formed, the noise reduction component is built into the fuel tank.

[0092] On the other hand, the present embodiment provides a vehicle, which includes the noise reduction component of the present application, or uses the fuel tank of the present application.

[0093] The vehicle of this embodiment adopts the noise reduction component or fuel tank of the present application, and has all the beneficial technical effects of all the embodiments in this document.

[0094] In a vehicle scenario, when the vehicle starts or brakes, the fuel in the fuel tank usually flows in the forward or backward direction of the vehicle under the action of inertia. At this time, the second direction b of the noise reduction component is arranged to coincide with the forward or backward direction of the vehicle, so that the noise reduction component can be used to buffer and absorb the energy of the fuel, thereby preventing the fuel from hitting the fuel tank and generating abnormal noise.

[0095] It should be noted that the "several" and "at least one" mentioned in this article refer to one or more, and "multiple" and "at least two" refer to two or more. "And / or" describes the association relationship of the associated objects, indicating that three relationships can exist. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the associated objects before and after are in an "or" relationship.

[0096] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0097] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0098] In the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0099] In the description of this specification, the reference terms "certain embodiments", "one embodiment", "some embodiments", "illustrative embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiments or examples are included in at least one embodiment or example of the present application.

[0100] The above description is only an embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the principles of the present application shall be included in the protection scope of the present application.

Claims

1. A noise reduction component, characterized in that: The noise reduction component comprises: a support column (1), a first fin (2) and a second fin (3); The support column (1) is cylindrical; The first end of the first fin (2) and the first end of the second fin (3) are respectively connected to opposite sides of the support column (1) along a first direction (a); the first direction (a) is parallel to the diameter direction of the support column (1); The second end of the first fin (2) and the second end of the second fin (3) are respectively suspended in the air and are respectively bent towards two ends of the second direction (b), so that the projections of the first fin (2) and the second fin (3) along the axial direction of the support column (1) are respectively arc-shaped, and the central angle α corresponding to the arc shape meets the target value range; The second direction (b) is respectively perpendicular to the first direction (a) and the axial direction of the support column (1).

2. The noise reduction assembly according to claim 1, characterized in that: The noise reduction component is configured such that when the fluid moves along the second direction (b), the first fin (2) and the second fin (3) can block the fluid, so that the fluid forms vortices on the surfaces of the first fin (2) and the second fin (3).

3. The noise reduction assembly according to claim 1, characterized in that: The support column (1) is provided with positioning flanges (11) at both axial ends, and a positioning hole (12) is provided in the middle of the positioning flange (11). The positioning flange (11) is used to abut against two opposite inner walls of the fuel tank, and the positioning hole (12) is used to insert the positioning column (4) on the corresponding inner wall of the fuel tank.

4. The noise reduction assembly according to claim 3, characterized in that: The edge of the positioning flange (11) is provided with at least one positioning notch (111), the inner wall of the fuel tank is provided with at least one positioning protrusion (5), and the at least one positioning notch (111) and the at least one positioning protrusion (5) are matched and connected.

5. The noise reduction assembly according to claim 1, characterized in that: The target value range of the central angle α corresponding to the arc shape is 30°-90°.

6. The noise reduction assembly according to any one of claims 1 to 5, characterized in that: The first fin (2) and the second fin (3) are respectively provided with a plurality of flow holes (21), and each of the flow holes (21) penetrates the corresponding first fin (2) or second fin (3) along the second direction (b).

7. The noise reduction assembly according to any one of claims 1 to 5, characterized in that: A liquid leakage gap (7) is provided between the first end of the first fin (2) and the first end of the second fin (3) and the surface of the support column (1), respectively.

8. A fuel tank, characterized in that: The fuel tank comprises the noise reduction assembly according to any one of claims 1 to 7.

9. The fuel tank according to claim 8, characterized in that: The fuel tank is made of plastic material and is formed by injection molding; the noise reduction component is preset in the injection molding cavity (9); the top and bottom ends of the support column (1) are respectively provided with support spikes (10); the height of the support spikes (10) is equal to the wall thickness of the fuel tank, and the melting point of the support spikes (10) is lower than that of the plastic material; The support spikes (10) are used to support and fix the noise reduction component in the injection molding cavity (9), and melt during the injection molding process, so that the top and bottom ends of the support column (1) are respectively filled with the plastic material.

10. A vehicle, characterized in that: The vehicle comprises the noise reduction assembly according to any one of claims 1 to 7, or adopts the fuel tank according to any one of claims 8 to 9.

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