A fuel cell muffler test bench

Abstract

The utility model discloses a fuel cell silencer test bench, including the frame of rack and several soundproof boards, several soundproof boards set up on the frame of rack, and several soundproof boards enclose the soundproof room, and the soundproof room is used for depositing the sound collecting equipment, the equipment of being tested can set up on the frame of rack, exhaust noise can be introduced into the soundproof room through the pipeline. The utility model discloses the frame of rack, its frame type's structural design can effectively reduce the weight of structure, is favorable to the position transfer of test bench, the frame of rack can supply the equipment of being tested (such as exhaust silencer) fixed, and it provides a fixed stable foundation for the equipment of being tested, and the equipment of being tested carries out corresponding function test conveniently, the soundproof room for depositing the sound collecting equipment is arranged on the frame of rack, and the exhaust noise in the test can be introduced into the soundproof room through the pipeline, thereby can be gathered to the sound collecting equipment, the existence of this soundproof room is favorable to reducing the influence of environmental noise to exhaust noise.

Description

Technical Field

[0001] This utility model belongs to the field of test bench technology, specifically relating to a fuel cell muffler test bench. Background Technology

[0002] Exhaust noise is one of the main sources of noise in hydrogen fuel cell systems. Exhaust mufflers can effectively reduce exhaust noise, and functional testing of exhaust mufflers can be conveniently performed using muffler test benches. Currently available muffler test benches typically use steel structures for the overall frame. These benches are usually large and heavy, and once fixed indoors, they are difficult to move. Therefore, they generally cannot be taken to anechoic chambers or open outdoor areas, and are usually only installed in ordinary indoor environments. They lack effective noise isolation devices, and the collected exhaust noise during testing is easily affected by ambient noise. Therefore, it is necessary to develop a fuel cell muffler test bench with a soundproof chamber to facilitate functional testing of exhaust mufflers. Utility Model Content

[0003] To address the aforementioned problems in the prior art, this utility model provides a fuel cell muffler test bench equipped with a soundproof chamber, which facilitates functional testing of the exhaust muffler.

[0004] The present invention adopts the following technical solution:

[0005] A fuel cell muffler test bench includes a bench frame and several sound insulation panels; the several sound insulation panels are disposed on the bench frame and form a soundproof chamber, which is used to house a sound-receiving device; the device under test can be disposed on the bench frame; exhaust noise can be introduced into the soundproof chamber through a pipe.

[0006] Furthermore, the platform frame is one or more of an aluminum frame and a steel frame.

[0007] Furthermore, a fuel cell muffler test bench also includes a wheel assembly, which is disposed under the test bench frame.

[0008] Furthermore, a fuel cell muffler test bench also includes a first mounting bracket; the first mounting bracket is disposed on the test bench frame and is used for fixing the exhaust muffler.

[0009] Furthermore, a fuel cell muffler test bench also includes an adjustment device; the first mounting bracket is positionally adjustable on the test bench frame via the adjustment device.

[0010] Furthermore, the adjusting device includes a slide rail and a slider; the slide rail is disposed on the frame; the slider is adjustablely disposed on the slide rail; and the first mounting bracket is disposed on the slider.

[0011] Furthermore, the sound insulation panel includes a panel, sound-absorbing cotton, and an inner panel; the panel is connected to the inner panel, and the sound-absorbing cotton is filled between the panel and the inner panel.

[0012] Furthermore, a fuel cell muffler test bench also includes a second mounting bracket; the second mounting bracket is disposed in the soundproof chamber and is used for fixing the sound receiving equipment.

[0013] Furthermore, the second mounting bracket consists of a base, a hinge, a universal joint, and studs.

[0014] Furthermore, the platform frame includes a first frame body and a second frame body;

[0015] The first frame body is fixedly connected to the second frame body;

[0016] Alternatively, the first frame body and the second frame body can be detachably connected.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0018] This utility model discloses a fuel cell muffler test bench, including a bench frame. Its frame-type structural design effectively reduces the weight of the structure and facilitates the relocation of the test bench. The bench frame can be used to fix the device under test (such as an exhaust muffler), providing a stable foundation for the device and facilitating functional testing. A soundproof chamber is provided on the bench frame for housing a sound-receiving device. Exhaust noise during testing can be introduced into the soundproof chamber through a pipe and thus collected by the sound-receiving device. The presence of this soundproof chamber helps reduce the impact of environmental noise on exhaust noise. Attached Figure Description

[0019] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0020] Figure 1 This is a three-dimensional schematic diagram of the frame of this utility model;

[0021] Figure 2 yes Figure 1 A magnified view of a portion at point A;

[0022] Figure 3 yes Figure 1 A magnified view of the area at point B;

[0023] Figure 4 yes Figure 1 A magnified view of the area at point C;

[0024] Figure 5 This is a front view of the present invention, "A Test Bench for a Fuel Cell Muffler";

[0025] Figure 6 This is a three-dimensional schematic diagram of the present invention, "A Test Bench for a Fuel Cell Muffler";

[0026] Figure 7 This is a partial cross-sectional view of the soundproof chamber of the present invention, "A Test Bench for a Fuel Cell Muffler";

[0027] Figure 8 yes Figure 7 A magnified view of the area at point D;

[0028] Figure 9 yes Figure 7 A magnified view of the area at point E;

[0029] Figure 10 yes Figure 7 A magnified view of the area at point F;

[0030] Figure 11 This is a three-dimensional schematic diagram of the second mounting bracket from a first-person perspective;

[0031] Figure 12 This is a three-dimensional schematic diagram of the second mounting bracket from a second perspective.

[0032] Figure label:

[0033] 1-Frame stand; 11-First frame main body; 12-Second frame main body; 121-Second hinge; 13-Modible latch;

[0034] 2-Sound insulation panel; 21-First vent; 22-Second vent; 23-Waist-shaped weight reduction hole; 24-Soundproof room;

[0035] 3-Swivel wheel assembly; 31-Universal wheels; 32-Brake wheel assembly;

[0036] 4-First mounting bracket; 41-Waist hole;

[0037] 5-Adjusting device; 51-Slide rail; 52-Slider;

[0038] 6-Second mounting bracket; 61-Base; 611-Knob; 62-Joint arm; 63-Universal joint; 64-Stud;

[0039] 71-Receiving equipment; 72-Sensor; 73-Wire harness;

[0040] 8-Exhaust muffler; 81-First pipe; 82-Second pipe;

[0041] A - First zoomed-in icon; B - Second zoomed-in icon; C - Third zoomed-in icon; D - Fourth zoomed-in icon; E - Fifth zoomed-in icon; F - Sixth zoomed-in icon. Detailed Implementation

[0042] The following will provide a clear and complete description of the concept, specific structure, and technical effects of this utility model in conjunction with the embodiments and accompanying drawings, so as to fully understand the purpose, solution, and effects of this utility model. It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The same reference numerals used throughout the drawings indicate the same or similar parts.

[0043] It should be noted that, unless otherwise specified, when a feature is referred to as "fixed" or "connected" to another feature, it can be directly fixed or connected to the other feature, or it can be indirectly fixed or connected to the other feature. Furthermore, the descriptions of "upper," "lower," "left," and "right" used in this utility model are only relative to the relative positional relationships of the various components of this utility model in the accompanying drawings.

[0044] Reference Figures 1 to 12 A fuel cell muffler test bench includes a bench frame 1 and several sound insulation panels 2; the several sound insulation panels 2 are disposed on the bench frame 1, and the several sound insulation panels 2 form a soundproof chamber 24, the soundproof chamber 24 is used to house a sound receiving device 71; the device under test (such as an exhaust muffler 8) can be disposed on the bench frame 1; exhaust noise can be introduced into the soundproof chamber 24 through a pipe (such as a second pipe 82).

[0045] In one embodiment, the platform frame 1 is one or more of an aluminum frame and a steel frame.

[0046] In this embodiment, the test bench frame 1 is an aluminum frame. The present invention uses aluminum alloy material to make the frame, which can greatly reduce the weight of the test bench.

[0047] Preferably, each component of the platform frame 1 is a hollow tube (e.g., a hollow tube with a square cross section and / or a hollow tube with a circular cross section).

[0048] Reference Figures 1 to 12 In one embodiment, a fuel cell muffler test bench further includes a caster wheel device 3, which is disposed under the test bench frame 1. The caster wheel device 3 makes the test bench easier to move.

[0049] Reference Figures 1 to 12 In this embodiment, the moving wheel device 3 includes a plurality of universal wheels 31, which are disposed under the frame 1; preferably, one or more of the universal wheels 31 are provided with brake wheel members 32, which are used to restrict the rolling of the universal wheels 31.

[0050] Reference Figures 1 to 12 In one embodiment, a fuel cell muffler test bench further includes a first mounting bracket 4; the first mounting bracket 4 is disposed on the test bench frame 1 and is used for fixing the exhaust muffler 8.

[0051] Reference Figures 1 to 12 In one embodiment, the first mounting bracket 4 is a U-shaped bracket (with a U-shaped cross-section).

[0052] Preferably, the first mounting bracket 4 is an aluminum alloy bracket, which helps to reduce the weight of the test bench.

[0053] Reference Figures 1 to 12 In one embodiment, a fuel cell muffler test bench further includes an adjustment device 5; the first mounting bracket 4 is positionally adjustable on the test bench frame 1 via the adjustment device 5.

[0054] Reference Figures 1 to 12 In one embodiment, the adjusting device 5 includes a slide rail 51 and a slider 52; the slide rail 51 is disposed on the frame 1; the slider 52 is disposed on the slide rail 51 in an adjustable position; preferably, the slider 52 is provided with a locking bolt for timely positioning.

[0055] Reference Figures 1 to 12 In one embodiment, the first mounting bracket 4 is connected to the slider 52, and the first mounting bracket 4 changes position via the slider 52.

[0056] Reference Figures 1 to 12 Preferably, the first mounting bracket 4 and the slider 52 are detachably connected. For example, the first mounting bracket 4 has fixing holes, and bolts pass through the fixing holes and connect with the threaded holes on the slider 52, thereby fixing the first mounting bracket 4 to the slider 52. Preferably, one end of the first mounting bracket 4 is provided with four fixing holes, and each slider 52 is provided with four corresponding threaded holes.

[0057] Reference Figures 1 to 12 In one embodiment, the U-shaped bracket is provided with a plurality of waist holes 41 of a predetermined length along its length; the waist holes 41 are used for fixing the equipment under test (such as an exhaust muffler 8).

[0058] Reference Figures 1 to 12 In one embodiment, the platform frame 1 is provided with two slide rails 51, each slide rail 51 is provided with two sliders 52, and each slider 52 is provided with a locking bolt for timely positioning.

[0059] Reference Figures 1 to 12 In one embodiment, two U-shaped brackets are arranged, each spanning one of the left and right slide rails 51. Each bracket is connected to a corresponding slider 52 by bolts. The distance between the two U-shaped brackets can be adjusted by sliding the sliders 52. The U-shaped brackets have multiple waist holes 41 along their length. Through the movement of the sliders and the cooperation of the multi-waist hole structure, different models of exhaust mufflers can be fixed.

[0060] Reference Figures 1 to 12 In one embodiment, the sound insulation panel 2 is provided with six panels; the six sound insulation panels 2 form a soundproof chamber 24. This invention, through the soundproof chamber 24, can reduce the impact of environmental noise on exhaust noise, which is beneficial for the sound-collecting device 71 to collect exhaust noise.

[0061] In one embodiment, the sound insulation panel 2 is detachably mounted on the platform frame 1; preferably, the sound insulation panel 2 is fixed to the platform frame 1 by screws.

[0062] Reference Figure 6 and Figure 7 In one embodiment, one of the sound insulation panels 2 (such as the front panel) is provided with a first vent 21, which is used as an air inlet and can be connected to a second pipe 82 (such as a silicone tube) connected to the rear of the exhaust muffler 8; another sound insulation panel 2 (such as the rear panel) is provided with a second vent 22, which is used as an exhaust outlet and can effectively discharge the exhaust gas in the sound insulation chamber 24.

[0063] In one embodiment, the sound insulation panel 2 includes a panel, sound-absorbing cotton, and an inner panel; the panel is connected to the inner panel, and the sound-absorbing cotton is filled between the panel and the inner panel.

[0064] In one embodiment, the panel is formed from sheet metal of aluminum alloy, and the inner panel is formed from sheet metal of steel with waist-shaped weight-reducing holes 23. The panel and the inner panel are connected by bolts, and the space between the panel and the inner panel is filled with sound-absorbing cotton. The use of aluminum alloy for the panel and the waist-shaped weight-reducing holes 23 in the inner panel reduce the weight of the test bench. Combined with the aluminum frame 1 and the caster wheel device 3 described above, this invention solves the problem of bulky and difficult-to-carry test benches in the prior art.

[0065] In one embodiment, the sound-absorbing cotton is disposed between the panel and the inner panel, acting like a wall.

[0066] Reference Figures 1 to 12 In one embodiment, a fuel cell muffler test bench further includes a second mounting bracket 6; the second mounting bracket 6 is disposed in the soundproof chamber 24 and is used for fixing the sound receiving device 71.

[0067] Reference Figure 7 , Figure 11 and Figure 12 In one embodiment, the second mounting bracket 6 consists of a base 61, a joint arm 62, a universal joint 63, and a stud 64.

[0068] Preferably, the second mounting bracket 6 consists of a magnetic base, two joint arms, three universal joints, and a stud; wherein the sound receiving device 71 is connected to the stud 64; the universal joints allow for multi-degree-of-freedom and multi-node adjustment of the position of the sound receiving device 71; preferably, the magnetic base is provided with a knob 611, which can be used to control the magnetic force. The magnetic base is disposed on the sound insulation plate 2, such as on the inner plate.

[0069] In one embodiment, the platform frame 1 includes a first frame body 11 and a second frame body 12;

[0070] The first frame body 11 is fixedly connected to the second frame body 12;

[0071] Alternatively, the first frame body 11 and the second frame body 12 can be detachably connected (see reference). Figure 1 ).

[0072] Reference Figure 1 and Figure 3 In this embodiment, the first frame body 11 consists of four door frames, with adjacent door frames connected by a first hinge, which facilitates the folding and unfolding of the first frame body 11. The second frame body 12 consists of two door frames, with the two door frames connected by a second hinge 121, which facilitates the folding and unfolding of the second frame body 12. This utility model designs the stand frame 1 as a foldable structure, which can greatly reduce the storage volume of the stand frame 1.

[0073] Reference Figure 1 , Figure 3 and Figure 4The first frame body 11 and the second frame body 12 are connected by a movable latch 13, which facilitates the disassembly of the first frame body 11 and the second frame body 12. Specifically, during disassembly, the movable latch 13 is released, allowing the first frame body 11 and the second frame body 12 to separate. Then, the first frame body 11 and the second frame body 12 can be folded and unfolded respectively.

[0074] Reference Figure 1 and Figure 4 In this embodiment, one vertical side of the second frame body 12 is connected to the first frame body 11 by five movable latches 13; the other vertical side of the second frame body 12 is also connected to the first frame body 11 by five movable latches 13; that is, the second frame body 12 and the first frame body 11 are connected by a total of ten movable latches 13.

[0075] Reference Figures 1 to 12 In one embodiment, the device under test is a fuel cell muffler (i.e., exhaust muffler 8). The exhaust muffler 8 is mounted on the first mounting bracket 4. The front end of the exhaust muffler 8 is connected to the tail outlet of the fuel cell system through a first pipe 81 (such as a silicone tube), and the rear end of the exhaust muffler 8 is guided into the soundproof chamber 24 through a second pipe 82 (such as a silicone tube). Both the first pipe 81 and the second pipe 82 have pre-drilled insertion holes for fixing sensors 72. Preferably, sensors 72 are installed in the insertion holes and fixed to the corresponding pipes by clamps. Specifically, the sensor 72 and the sound-receiving device 71 are connected to wiring harnesses 73 (such as electrical wires). The sensor 72 and the sound-receiving device 71 are each electrically connected to the processing device through the wiring harnesses 73. The specific details of the sound-receiving device 71, sensor 72, and processing device can be found in the prior art.

[0076] During testing, the exhaust gas from the fuel cell system enters the exhaust muffler 8 through the first pipe 81. After silencing, it is then introduced into the soundproof chamber 24 through the second pipe 82. Noise is then collected by the sound-collecting device 71 (exhaust noise is data required for the test to verify the silencing performance of the exhaust muffler 8). The pre-drilled insertion holes on the (first and second) pipes allow for the insertion of different sensors 72, facilitating the collection of desired test information. For example, by installing pressure sensors in the corresponding insertion holes, the pressure of the exhaust gas before and after passing through the exhaust muffler 8 can be measured, thus determining the flow resistance of the exhaust muffler 8.

[0077] Other aspects of the fuel cell muffler test bench described in this utility model are available in the prior art and will not be repeated here.

[0078] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Therefore, any modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the scope of the technical solution of the present utility model.

Claims

1. A fuel cell muffler test stand characterized by, It includes a test bench frame and several sound insulation panels; the sound insulation panels are arranged on the test bench frame and form a soundproof chamber, which is used to house a sound-receiving device; the device under test can be installed on the test bench frame; exhaust noise can be introduced into the soundproof chamber through a pipe.

2. A fuel cell muffler test stand according to claim 1, wherein The platform frame is one or more of aluminum or steel.

3. A fuel cell muffler test stand according to claim 1, wherein It also includes a moving wheel device, which is located under the frame of the platform.

4. A fuel cell muffler test stand according to claim 1, wherein It also includes a first mounting bracket; the first mounting bracket is disposed on the platform frame and is used for fixing the exhaust muffler.

5. A fuel cell muffler test stand according to claim 4, wherein It also includes an adjustment device; the first mounting bracket is positioned adjustablely on the platform frame via the adjustment device.

6. A fuel cell muffler test stand according to claim 5, wherein, The adjusting device includes a slide rail and a slider; the slide rail is mounted on the frame; the slider is adjustablely mounted on the slide rail; and the first mounting bracket is mounted on the slider.

7. A fuel cell muffler test stand according to claim 1, wherein The sound insulation panel includes a front panel, sound-absorbing cotton, and an inner panel; the front panel is connected to the inner panel, and the sound-absorbing cotton is filled between the front panel and the inner panel.

8. A fuel cell muffler test stand according to claim 1, wherein It also includes a second mounting bracket; the second mounting bracket is disposed in the soundproof room and is used for fixing the sound receiving equipment.

9. A fuel cell muffler test stand according to claim 8, wherein, The second mounting bracket consists of a base, a hinge, a universal joint, and studs.

10. A fuel cell muffler test stand according to any one of claims 1 to 9, characterized in that The platform frame includes a first frame body and a second frame body; The first frame body is fixedly connected to the second frame body; Alternatively, the first frame body and the second frame body can be detachably connected.

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