Secondary silencer structure of power van

Abstract

The utility model relates to the technical field of automobile exhaust silencers, in particular to a secondary silencer structure of a power van. Comprising a shell, a partition plate and an auxiliary device, the auxiliary device comprises a front end cover, a rear end cover, a first silencing pipe, a second silencing pipe, a foamed aluminum sound absorption barrel, a foamed aluminum sound absorption plate and a matching assembly, during work, waste gas enters the front side of the interior of the shell through a gas inlet cavity of the front end cover, part of airflow enters the first silencing pipe, and during circulation, part of airflow passes through the foamed aluminum sound absorption barrel on the outer side and enters the second silencing pipe. Meanwhile, part of airflow enters the multiple second silencing pipes in the annular array at the same time, during circulation, part of airflow passes through the foamed aluminum sound absorption barrel on the outer side, then the airflow is blocked and decelerated through the foamed aluminum sound absorption plate after being converged, is treated through the matching assembly and is discharged through the rear end cover, noise reduction is achieved, and therefore in the using process, sound transmission channels can be increased, and noise is reduced. Better airflow blocking, speed reduction and noise reduction are achieved, and the noise reduction effect can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile exhaust mufflers, in particular to a secondary muffler structure for a power supply vehicle. Background Art

[0002] The exhaust noise of a car is the main component of driving noise. The exhaust muffler is a device designed to reduce exhaust noise. When working, it eliminates noise by reducing and attenuating the pulsation of exhaust pressure.

[0003] There are two basic types of exhaust silencers: absorption and reflection. Absorption silencers reduce the energy of exhaust gas through the friction of exhaust gas on sound-absorbing materials such as glass fiber, steel fiber and asbestos; reflection silencers have multiple series-connected harmonic chambers and porous reflection tubes of different lengths connected to each other. The exhaust gas undergoes multiple reflections, collisions, expansions and cooling to reduce its pressure, reduce vibration and energy.

[0004] At present, when eliminating automobile exhaust noise, multi-stage silencer treatment is mostly used. The exhaust gas is first processed by a first-stage silencer and then discharged through a second-stage silencer. However, the existing second-stage silencer structure is mostly a traditional single-channel structure with a single sound propagation channel and poor noise reduction effect. Utility Model Content

[0005] The utility model aims to provide a two-stage muffler structure for a power supply vehicle, which is designed to increase the sound propagation channel when in use, achieve better airflow blocking, deceleration and noise reduction, and is conducive to improving the noise reduction effect.

[0006] To achieve the above-mentioned purpose, the utility model provides a two-stage muffler structure for a power supply vehicle, comprising a shell and a partition, wherein the partition is fixedly connected to the shell and is located inside the shell, and further comprises an auxiliary device;

[0007] The auxiliary device includes a front end cover, a rear end cover, a first silencer, a second silencer, a foam aluminum sound absorbing tube, a foam aluminum sound absorbing board and a matching component. The front end cover is fixedly connected to the shell and is located at the front side of the shell. The rear end cover is fixedly connected to the shell and is located at the rear of the shell. The first silencer is fixedly connected to the partition and is located on the partition. The second silencer is fixedly connected to the partition and is located on a side of the partition close to the first silencer. The foam aluminum sound absorbing tube is respectively mounted on the outside of the first silencer and the second silencer and is respectively located on the first silencer and the second silencer. The foam aluminum sound absorbing board is fixedly connected to the shell and is located on a side of the shell close to the first silencer. The matching component is arranged in the shell.

[0008] Wherein, the auxiliary device also includes a connecting seat, which is fixedly connected to the front end cover and is located on the front end cover.

[0009] Wherein, the matching component includes a primary filter element and a secondary treatment component, the primary filter element is arranged between the front end cover and the partition; the secondary treatment component is arranged between the foam aluminum sound absorbing plate and the rear end cover.

[0010] Wherein, the secondary processing component includes a first filter element and a second filter element, the first filter element is slidably connected to the shell and is located on the side of the shell close to the foam aluminum sound absorbing board; the second filter element is slidably connected to the shell and is located between the first filter element and the rear end cover.

[0011] Among them, the auxiliary device also includes a first protective cover and a second protective cover, the first protective cover is slidably connected to the shell and is located on the outside of the shell; the second protective cover is slidably connected to the shell and is fixedly connected to the first protective cover, and is located on the side of the shell close to the first protective cover.

[0012] The utility model discloses a two-stage muffler structure for a power supply vehicle, wherein a partition is installed in a shell, a front end cover is installed in the front side of the shell, an air intake cavity is provided, a rear end cover is installed in the rear side of the shell, an exhaust groove and an exhaust hole are provided, a first muffler is installed in the partition, a circular small hole is provided on the tube, a second muffler is installed in the partition and arranged in an annular interval, a circular small hole is provided on the tube, a foam aluminum sound absorbing tube is respectively sleeved on the outside of the first muffler and the second muffler, a foam aluminum sound absorbing plate is installed in the shell near the side of the first muffler, a matching component is arranged in the shell, when working, the exhaust gas enters the front side of the shell through the air intake cavity of the front end cover, part of the air flow enters the first muffler, when circulating, part of the air flow passes through the outer foam aluminum sound absorbing tube, and at the same time, part of the air flow will simultaneously enter a plurality of second muffler tubes of the annular array, when circulating, part of the air flow passes through the outer foam aluminum sound absorbing tube, and then, after the air flow converges, it will be blocked and decelerated by the foam aluminum sound absorbing plate, and after being processed by the matching component, it will be discharged through the rear end cover to achieve noise reduction, and then when in use, the sound propagation channel can be increased, and better air flow blocking, deceleration and noise reduction can be achieved, which is conducive to improving the noise reduction effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below.

[0014] Figure 1 It is a schematic diagram of the overall structure of the secondary muffler structure of the power supply vehicle of the first embodiment of the utility model.

[0015] Figure 2It is a schematic diagram of the installation position of the foam aluminum sound-absorbing tube of the first embodiment of the utility model.

[0016] Figure 3 It is a schematic structural diagram of the first muffler pipe of the first embodiment of the utility model.

[0017] Figure 4 It is a schematic diagram of the overall structure of the secondary muffler structure of the power supply vehicle of the second embodiment of the utility model.

[0018] In the figure: 101-shell, 102-partition, 103-front end cover, 104-rear end cover, 105-first silencer, 106-second silencer, 107-foam aluminum sound absorbing tube, 108-foam aluminum sound absorbing board, 109-connecting seat, 110-primary filter element, 111-first filter element, 112-second filter element, 201-first protective cover, 202-second protective cover. DETAILED DESCRIPTION

[0019] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0020] Embodiment 1:

[0021] like Figures 1 to 3 As shown, Figure 1 This is the overall structural diagram of the secondary muffler structure of the power supply vehicle. Figure 2 This is a schematic diagram of the installation position of the foam aluminum sound absorbing tube 107. Figure 3 It is a structural schematic diagram of the first muffler 105. The utility model provides a two-stage muffler structure for a power supply vehicle: including a shell 101, a partition 102 and an auxiliary device, the auxiliary device includes a front cover 103, a rear cover 104, a first muffler 105, a second muffler 106, a foam aluminum sound absorbing tube 107, a foam aluminum sound absorbing board 108, a connecting seat 109 and a matching component, the matching component includes a primary filter element 110 and a secondary treatment component, the secondary treatment component includes a first filter element 111 and a second filter element 112. Through the above scheme, it can be achieved that when in use, the sound propagation channel can be increased, and better airflow blocking, deceleration and noise reduction can be achieved, which is conducive to improving the noise reduction effect. It can be understood that the above scheme can increase the sound propagation channel when in use, and better airflow blocking, deceleration and noise reduction can be achieved, which is conducive to improving the noise reduction effect.

[0022] In this embodiment, the partition plate 102 is fixedly connected to the shell 101 and is located inside the shell 101 . The partition plate 102 is installed inside the shell 101 by bolts.

[0023] Among them, the front end cover 103 is fixedly connected to the shell 101 and is located at the front side of the shell 101, the rear end cover 104 is fixedly connected to the shell 101 and is located at the tail of the shell 101, the first muffler 105 is fixedly connected to the partition 102 and is located on the partition 102, the second muffler 106 is fixedly connected to the partition 102 and is located on the side of the partition 102 close to the first muffler 105, the foam aluminum sound absorbing tube 107 is respectively sleeved on the outside of the first muffler 105 and the second muffler 106, and is respectively located on the first muffler 105 and the second muffler 106, the foam aluminum sound absorbing board 108 is fixedly connected to the shell 101 and is located on the side of the shell 101 close to the first muffler 105, the matching components are arranged in the shell 101, the front end cover 103 is installed on the shell 101 by bolts, and an air inlet cavity is opened, and the rear end cover 104 is installed by Bolts are installed on the shell 101, and ventilation grooves and ventilation holes are provided. The first silencer 105 mounting plate is installed on the partition 102 by bolts, and a plurality of circular through holes are provided on the first silencer 105. The second silencer 106 mounting plate is installed on the partition 102 by bolts. The annular array is installed on the outside of the first silencer 105, and a plurality of circular through holes are provided on the second silencer 106. The foam aluminum sound absorbing tube 107 is respectively sleeved on the outside of the first silencer 105 and the second silencer 106. The foam aluminum sound absorbing plate 108 is installed on the shell 101 by bolts, and the foam aluminum sound absorbing tube 107 can be limited. The foam aluminum sound absorbing tube 107 and the foam aluminum sound absorbing plate 108 are both made of open-pore foam aluminum material to replace traditional sound absorbing materials. They are resistant to high temperature and corrosion, and overcome the shortcomings of traditional sound absorbing materials such as moisture absorption, environmental pollution, and short life. The density of open-pore foam aluminum is 1 / 14 of that of steel, which can make the muffler lighter.

[0024] Secondly, the connecting seat 109 is fixedly connected to the front end cover 103 and is located on the front end cover 103. The connecting seat 109 is installed on the outside of the air inlet cavity of the front end cover 103 by bolts, and its inlet can be connected to the output pipe of the first-stage muffler.

[0025] Then, the primary filter element 110 is arranged between the front end cover 103 and the partition 102; the secondary treatment component is arranged between the foam aluminum sound absorbing plate 108 and the rear end cover 104, and the primary filter element 110 is directly arranged between the front end cover 103 and the partition 102. After the front cover 103 is installed, it is limited to perform primary filtration of the airflow.

[0026] Finally, the first filter element 111 is slidably connected to the shell 101 and is located on the side of the shell 101 close to the foam aluminum sound-absorbing plate 108; the second filter element 112 is slidably connected to the shell 101 and is located between the first filter element 111 and the rear end cover 104. When the first filter element 111 is installed, it is directly slid into the shell 101 and is located on the air outlet end side of the first silencer 105 and the second silencer 106. The second filter element 112 is directly slid into the shell 101 and is located between the first filter element 111 and the rear end cover 104 after installation, and is limited by the rear end cover 104 after installation.

[0027] When the utility model is used to increase the sound propagation channel, better airflow blocking, deceleration and noise reduction are achieved, which is beneficial to improving the noise reduction effect. During operation, the exhaust gas enters the front side of the shell 101 through the connecting seat 109 and the air inlet cavity of the front end cover 103. After being filtered by the primary filter element 110, part of the airflow enters the first silencer 105. During circulation, part of the airflow passes through the outer foam aluminum sound absorbing tube 107 at the same time. At the same time, part of the airflow will simultaneously enter the plurality of second silencers 106 of the circular array. During circulation, part of the airflow will also pass through the outer foam aluminum sound absorbing tube 107. Then, after the airflow converges, it will be blocked and decelerated by the foam aluminum sound absorbing plate 108. After being filtered and processed by the first filter element 111 and the second filter element 112, it will be discharged through the rear end cover 104 to achieve noise reduction. Therefore, when in use, the sound propagation channel can be increased, better airflow blocking, deceleration and noise reduction are achieved, which is beneficial to improving the noise reduction effect.

[0028] Embodiment 2:

[0029] like Figure 4 As shown, Figure 4 It is an overall structural diagram of the two-stage muffler structure of a power supply vehicle. On the basis of the first embodiment, the utility model provides a two-stage muffler structure of a power supply vehicle, and the auxiliary device also includes a first protective cover 201 and a second protective cover 202.

[0030] Among them, the first protective cover 201 is slidably connected to the shell 101 and is located on the outside of the shell 101; the second protective cover 202 is slidably connected to the shell 101 and is fixedly connected to the first protective cover 201, and is located on the side of the shell 101 close to the first protective cover 201. The first protective cover 201 and the second protective cover 202 are of the same size and both have a semicircular cavity, which can be snapped into the outside of the shell 101. After being snapped in, they are connected and fixed by screws and nuts.

[0031] In this embodiment, by providing the first protective cover 201 and the second protective cover 202, the housing 101 can be protected to avoid being damaged by impact, thereby improving safety.

[0032] What is disclosed above is only one or more preferred embodiments of the present application, and cannot be used to limit the scope of rights of the present application. Ordinary technicians in this field can understand that all or part of the processes of implementing the above embodiments and equivalent changes made according to the claims of the present application are still within the scope covered by the present application.

Claims

1. A secondary muffler structure for a power supply vehicle, comprising a shell and a partition, wherein the partition is fixedly connected to the shell and is located inside the shell, characterized in that: Also includes auxiliary devices; The auxiliary device includes a front end cover, a rear end cover, a first silencer, a second silencer, a foam aluminum sound absorbing tube, a foam aluminum sound absorbing board and a matching component. The front end cover is fixedly connected to the shell and is located at the front side of the shell. The rear end cover is fixedly connected to the shell and is located at the rear of the shell. The first silencer is fixedly connected to the partition and is located on the partition. The second silencer is fixedly connected to the partition and is located on a side of the partition close to the first silencer. The foam aluminum sound absorbing tube is respectively mounted on the outside of the first silencer and the second silencer and is respectively located on the first silencer and the second silencer. The foam aluminum sound absorbing board is fixedly connected to the shell and is located on a side of the shell close to the first silencer. The matching component is arranged in the shell.

2. The secondary muffler structure of the power supply vehicle according to claim 1, characterized in that: The auxiliary device also includes a connecting seat, which is fixedly connected to the front end cover and is located on the front end cover.

3. The secondary muffler structure of the power supply vehicle according to claim 1, characterized in that: The matching component includes a primary filter element and a secondary treatment component. The primary filter element is arranged between the front end cover and the partition plate; the secondary treatment component is arranged between the foam aluminum sound absorbing plate and the rear end cover.

4. The secondary muffler structure of the power supply vehicle as claimed in claim 3, characterized in that: The secondary treatment component includes a first filter element and a second filter element. The first filter element is slidably connected to the shell and is located on the side of the shell close to the foam aluminum sound absorbing board; the second filter element is slidably connected to the shell and is located between the first filter element and the rear end cover.

5. The secondary muffler structure of the power supply vehicle according to claim 1, characterized in that: The auxiliary device also includes a first protective cover and a second protective cover, the first protective cover is slidably connected to the shell and is located on the outside of the shell; the second protective cover is slidably connected to the shell and is fixedly connected to the first protective cover, and is located on the side of the shell close to the first protective cover.

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