CN204488679U - Air intake sound arrester and supply vehicle thereof - Google Patents

Abstract

The utility model discloses an air inlet noise reduction device and a power supply vehicle thereof. Wherein, the air inlet muffler device includes a box body and a first muffler panel, and the front and back sides of the box body are provided with an air inlet and an air outlet respectively, and the first muffler panel is arranged between the air inlet and the air outlet and forms a folded shape with the box body. curved channel. Based on the wind inlet muffler provided by the utility model, the first muffler panel can absorb and reflect the noise, and the bent channel increases the number of reflections of sound waves and can avoid the propagation of direct sound, thereby effectively reducing the noise of the generator set. radiated noise to achieve a good noise reduction effect; at the same time, because only one sound-absorbing panel is set up to form a bent channel, the wind resistance is small, which can ensure sufficient air intake to achieve a good heat dissipation effect; and this practical The newly provided air inlet muffler device has simple structure and low cost.

Description

Air intake muffler and its power supply vehicle

technical field

The utility model relates to the technical field of mobile power supply equipment, in particular to an air inlet noise reduction device and a power supply vehicle thereof.

Background technique

The power supply car is used as a power source for emergency operations and outdoor operations. Its generator set generates a lot of noise when it is working. At the same time, it needs ventilation and cooling to meet its heat dissipation requirements. Therefore, an air intake and noise reduction device with good sound absorption and insulation performance and ventilation and heat dissipation performance is designed. It has become an important work content in the design stage of the power supply vehicle.

At present, in order to reduce the radiated noise when the generator set is working and meet its heat dissipation requirements, an air inlet muffler is usually installed on both sides of the power supply car body. The sound-absorbing panel is composed of a perforated plate and sound-absorbing and insulating materials, so that it can play the role of sound-absorbing and insulating and ventilation.

Although the structure of the air inlet noise reduction device with inclined slice type noise reduction panels is relatively simple, due to the large spacing between the panels, there are few noise reflection surfaces and the noise can be directly transmitted without passing through the noise reduction panels, resulting in the disadvantage of this type of air inlet noise reduction device. Noise reduction is not effective. The air inlet muffler with a labyrinth-type muffler panel has obvious noise reduction effect, but the structure of this air inlet muffler is relatively complex, the wind resistance is large, and the effective air inlet area is small, resulting in limited heat dissipation performance and poor heat dissipation effect .

Utility model content

The purpose of the utility model is to provide an air inlet noise reduction device with small wind resistance, good noise reduction effect and simple structure.

According to one aspect of the present invention, the present invention provides an air inlet noise reduction device, which includes a box body and a first noise elimination panel, the front and back of the box body are respectively provided with an air inlet and an air outlet, and the first noise elimination panel It is arranged between the air inlet and the air outlet and forms a bent channel with the box body.

Optionally, the first sound attenuation panel is parallel to the front and back of the box.

Optionally, both sides of the first sound attenuation panel respectively intersect with a line connecting the edges of the air inlet and the air outlet on the corresponding side to avoid direct sound transmission.

Optionally, the distance between the first sound-absorbing panel and the rear of the box body is equal to the distances between the two sides of the first sound-absorbing panel and the left side and the right side of the box body respectively.

Optionally, the front of the box is completely opened to form an air inlet.

Optionally, the air inlet muffler device further includes a second muffler panel, and the second muffler panel is arranged at an angle to the first muffler panel.

Optionally, the second anechoic panel is arranged perpendicular to the first anechoic panel.

Optionally, the second sound attenuation panel is arranged in the middle of the box body.

Optionally, sound-absorbing and insulating materials are pasted on the inner wall of the box and/or the outer wall of the box.

According to another aspect of the utility model, the utility model also provides a power supply vehicle, which includes any one of the above air inlet and noise reduction devices.

Based on the air inlet muffler provided by the utility model, the first muffler panel can absorb and reflect the noise, and the bent channel increases the number of reflections of sound waves and can avoid the propagation of direct sound, thereby effectively reducing the noise of the generator set. radiated noise to achieve a good noise reduction effect; at the same time, because only one sound-absorbing panel is set up to form a bent channel, the wind resistance is small, which can ensure sufficient air intake to achieve a good heat dissipation effect; and the utility model The newly provided air inlet muffler device has simple structure and low cost.

Other features and advantages of the present invention will become clear through the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are only some embodiments of the utility model, and those skilled in the art can also obtain other drawings according to these drawings without any creative effort.

Fig. 1 shows the axonometric view of the air inlet muffler provided by the utility model without the top surface.

Fig. 2 shows the front view of the air inlet muffler provided by the utility model.

Fig. 3 shows a cross-sectional view of Fig. 2 along the direction A-A.

In the figure: 1, the first noise reduction panel; 2, the air outlet; 3, the inner wall surface; 4, the second noise reduction panel; 5, the air inlet.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. example. The following description of at least one exemplary embodiment is merely illustrative in nature, and in no way serves as any limitation of the invention and its application or use. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

The relative arrangements of components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.

At the same time, it should be understood that, for the convenience of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship.

Techniques, methods and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, such techniques, methods and devices should be considered part of the Authorized Specification.

In all examples shown and discussed herein, any specific values should be construed as exemplary only, and not as limitations. Therefore, other examples of the exemplary embodiment may have different values.

It should be noted that like numerals and letters denote like items in the following figures, therefore, once an item is defined in one figure, it does not require further discussion in subsequent figures.

In the present utility model, in the case of no contrary description, the used orientation words "up, down, left and right" usually refer to the up, down, left and right shown in the accompanying drawings, "inside and outside" Refers to the inside and outside of the outline of each part itself.

Referring to Fig. 1 and Fig. 3, the air inlet and muffler device provided by the utility model has a box-type structure as a whole, and the front and back of the box are respectively provided with an air inlet 5 and an air outlet 2, preferably, the front is completely opened to form an air inlet 5. Between the air inlet 5 and the air outlet 2, a first muffler panel 1 is provided, and the first muffler panel 1 and the box body form a bent channel. The air inlet muffler is embedded in the power supply car body, the air inlet 5 faces outwards, and the air outlet 2 stretches into the car body. Louvers or air intake grilles can be installed at the air inlet 5 to protect the internal structure of the air intake muffler. Referring to FIG. 3 , the first sound-absorbing panel 1 is preferably arranged parallel to the front and back of the box body, the structure is simple, and the air intake areas on both sides of the first sound-absorbing panel 1 can be equalized, which is easy to control the air volume.

Based on the above technical solutions, the first noise-absorbing panel 1 can absorb and reflect noise, and the bending channel increases the number of reflections of sound waves, and the noise is repeatedly reflected and absorbed by the bending channel, thereby effectively reducing the noise of the generator set. Radiate noise to achieve a good noise reduction effect; at the same time, because only one sound-absorbing panel is used to form a bent channel, the wind resistance is small, which can ensure sufficient air intake to achieve a good heat dissipation effect on the generator set.

In each of the above-mentioned technical solutions, the air inlet muffler device can also include a second muffler panel 4, and the second muffler panel 4 is arranged at an angle to the first muffler panel 1, referring to Fig. 1, preferably the second muffler panel 4 is vertical It is arranged on the first noise-absorbing panel 1, so that the second noise-absorbing panel 4 plays a role of fixing the first noise-absorbing panel 1 on the one hand, and on the other hand increases the noise-absorbing area and the sound wave reflection surface. The noise reduction panel 4 does not increase the wind resistance, therefore, without affecting the heat dissipation effect, the air inlet noise reduction device has a better noise reduction effect. As shown in FIG. 2 , the second sound-absorbing panel 4 can be installed in the middle of the air-inlet sound-absorbing device, thereby forming two upper and lower bent passages to further reduce noise.

In the above-mentioned embodiments, the first sound-absorbing panel 1 and the second sound-absorbing panel 4 may include a perforated plate and a supporting wall, and sound-absorbing materials and sound-insulating materials are arranged between the perforated plate and the supporting wall. The perforated plate plays a role of fixed support and protection for the sound-absorbing and insulating material, and the supporting wall acts as a supporting role. For example, the supporting wall can be a steel plate, and the sound-insulating material and the sound-absorbing material are coated on the steel plate sequentially from the inside to the outside, so Sound waves can pass through the holes in the perforated board to reach the sound-absorbing material and sound-insulating material in turn, and be absorbed or reflected to achieve the effect of noise reduction.

The inner wall surface 3 of the box body can also be coated with sound-absorbing material, so that when the noise is reflected in the bent channel, part of the noise is also absorbed by the inner wall surface 3 of the box body, thereby further improving the noise reduction effect. The inner wall surface 3 here includes the rear inner wall and the left and right inner walls of the box. Of course, it is also possible to coat the outer wall of the box with a sound-absorbing and insulating material to pre-absorb the noise in the compartment.

In order to avoid the propagation of direct sound, the left and right sides of the first noise-absorbing panel 1 respectively intersect with the connecting line between the air inlet 5 and the edge of the air outlet 2 on the corresponding side, that is, the length of the two dotted lines shown in Fig. The horizontal distance at the installation position of the acoustic panel 1, the two dotted lines here, one of which is the connection line between the left edge of the air inlet 5 and the left edge of the air outlet 2, and the other is the line between the right edge of the air inlet 5 and the air outlet 2 The connection line on the right edge, that is, the left and right sides of the first noise reduction panel 1 reach the dotted line or even exceed the dotted line on the corresponding side, so that the noise cannot be directly transmitted in the air inlet noise reduction device, but must be absorbed by the noise reduction panel And the multiple reflections of the bent channel, so as to further improve the noise reduction effect of the air inlet noise reduction device provided by the utility model.

In addition, in order to make the above-mentioned air inlet noise reduction device have a better heat dissipation effect, the distance between the first noise reduction panel 1 and the back of the box and the distance between the two sides of the first noise reduction panel 1 and the left and right sides of the box respectively equal, so that the effective air intake volume of the bent channel is larger and the air intake speed is smoother, so that the air intake muffler device has a better heat dissipation effect.

It should be noted that the air inlet 5 can not only be formed by opening the front of the box as shown in the above embodiments, but can also be formed by opening part of the front of the box similar to the air outlet 2 . Preferably, the air inlet 5 is formed by opening the whole front of the box body, which has the advantage of enabling the air inlet and muffler to have a larger air intake.

The utility model also provides a power supply vehicle including any one of the above air inlet and noise reduction devices. Because the wind-inlet muffler has the above technical effects, the power supply vehicle of the present utility model also has corresponding effects.

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present utility model shall be included in this utility model. within the scope of protection of utility models.

Claims (10)

1. an air intake sound arrester, it is characterized in that, comprise casing and the first noise elimination panel (1), the front-back of described casing offers ventilation inlet (5) and air outlet (2) respectively, and described first noise elimination panel (1) to be arranged between described ventilation inlet (5) and described air outlet (2) and to form bending-type passage with described casing.

2. air intake sound arrester according to claim 1, is characterized in that, described first noise elimination panel (1) is parallel with the front-back of described casing.

3. air intake sound arrester according to claim 2, it is characterized in that, described first noise elimination panel (1) both sides are crossing to avoid direct sound propagation with the described ventilation inlet (5) of respective side and the line at described air outlet (2) edge respectively.

4. air intake sound arrester according to claim 3, it is characterized in that, described first noise elimination panel (1) with after described casing between Distance geometry described in the first noise elimination panel (1) both sides equal with the distance between the casing left side and the right side respectively.

5. air intake sound arrester according to claim 1, is characterized in that, opens wide completely and form described ventilation inlet (5) before described casing.

6. according to the arbitrary described air intake sound arrester of claim 1-5, it is characterized in that, described air intake sound arrester also comprises the second noise elimination panel (4), described second noise elimination panel (4) and described first noise elimination panel (1) angled setting.

7. air intake sound arrester according to claim 6, is characterized in that, described second noise elimination panel (4) is arranged perpendicular to described first noise elimination panel (1).

8. air intake sound arrester according to claim 7, is characterized in that, described second noise elimination panel (4) is arranged at the midway location of described casing.

9. air intake sound arrester according to claim 1, is characterized in that, the internal face (3) of described casing and/or the outside wall surface of described casing are pasted with sound absorption material.

10. a supply vehicle, is characterized in that, comprises the arbitrary described air intake sound arrester of claim 1-9.