Detachable air inlet silencer

Abstract

The invention relates to a detachable air inlet silencer which comprises a silencing shutter, a metal frame, a fixed panel and sound absorption plates, and the detachable sound absorption plates are installed at an inlet of the air inlet silencer and the left face, the right face, the upper face and the rear face of the air inlet silencer. And a foamed aluminum plate is adopted as an internal sound absorption material of the detachable sound absorption plate. The air inlet silencer can achieve the effective silencing effect of about 15dB within the low-frequency range, the medium-frequency range and the high-frequency range on the premise that the structural size is controlled. The air inlet silencer does not depend on the limitation of the structural size, has full-band effective silencing performance, and has certain practical value for engineering application; the detachable air inlet silencer is installed on an air inlet filter of the diesel generating set through machine feet on the metal frame and a sealing rubber pad. The air inlet silencer is convenient to disassemble and assemble, the air inlet filter of the diesel generating set is convenient to disassemble, inspect and replace, and a sound absorption material in the air inlet silencer is convenient to inspect and replace.

Description

Technical Field

[0001] The invention relates to an air intake muffler for reducing vibration and noise, in particular to a detachable air intake muffler. Background Art

[0002] The air intake muffler is mainly used for the air intake filter of diesel generator sets to reduce the wind noise generated by the air intake filter when it is working.

[0003] Different types of mufflers have different advantages and disadvantages:

[0004] 1) The main disadvantage of the expansion chamber muffler is that it requires a considerable axial length to work effectively in the low-frequency range, and the space occupied by the huge side branch structure cannot meet the compact structural requirements of actual engineering requirements.

[0005] 2) The main disadvantage of the Helmholtz silencer is that its silencing frequency has a narrow band characteristic, which can only eliminate targeted characteristic frequencies and cannot meet the broadband silencing effect in actual engineering.

[0006] 3) Resistive silencers generally use the friction between the sound-absorbing material in the internal structure and the medium to convert sound energy into heat energy to achieve the purpose of reducing noise. However, the sound-absorbing material is generally effective for noise in the high-frequency range and has weaker control ability for noise in the low-frequency range.

[0007] In recent years, with the continuous improvement of environmental vibration and noise requirements, there are certain restrictions on the radiation noise of diesel generators. Generally, the radiation noise can be attenuated by installing noise control devices such as silencers and soundproof covers at the air inlet. Although both can control the radiation noise to a certain extent, the soundproof cover is not conducive to the heat dissipation of the unit, and there are certain difficulties in its installation and maintenance. The sound-absorbing performance of the traditional silencer is limited by its own size. If you want to achieve a sound attenuation of more than 10dB in the low-frequency range, you need a larger installation space, which is undoubtedly unfavorable. In order to improve this problem, a new sound-absorbing material is introduced: foam aluminum plate. The silencer is designed through the shutter air inlet form. Based on high-efficiency sound-absorbing materials, when sound waves propagate in the silencer channel, the sound energy is converted into heat energy due to friction, and energy dissipation is generated to achieve the purpose of silencer. Summary of the invention

[0008] The present invention is to provide a detachable air intake silencer, introduce a new sound-absorbing material: foam aluminum plate, design the silencer through a louver air intake form, based on high-efficiency sound-absorbing materials, utilize the sound energy converted into heat energy due to friction when sound waves propagate in the silencer channel, and generate energy dissipation to achieve the purpose of silencer.

[0009] To achieve the above objectives, the technical solution of the present invention is: a detachable air intake silencer, including silencer louvers, a metal frame, a fixed panel, and a sound absorbing plate. The detachable sound absorbing plates are installed at the inlet of the air intake silencer and on the left, right, top, and rear surfaces.

[0010] Furthermore, the internal sound absorbing material of the detachable sound absorbing panel is a foam aluminum plate.

[0011] Furthermore, the surface of the detachable sound absorbing board is covered with a rigid panel of a certain thickness.

[0012] Furthermore, the detachable sound absorbing plate is installed at the inlet of the air intake muffler at a certain angle to the horizontal direction of the air intake.

[0013] Furthermore, fixed panels are installed on the other three surfaces of the inlet of the air intake muffler except the surface on which the detachable sound absorbing panel is installed.

[0014] Furthermore, a silencer shutter is installed at the inlet of the air intake silencer.

[0015] Furthermore, the sound-absorbing louvers are installed in the metal frame through metal inserts to form detachable sound-absorbing louvers.

[0016] Furthermore, a sealing gasket is arranged between the detachable sound absorbing panel and the metal frame.

[0017] Furthermore, a handle is provided on the detachable sound absorbing panel.

[0018] Furthermore, the detachable air intake muffler is installed on the air intake filter of the diesel generator set through the machine feet on the metal frame and the sealing rubber pad.

[0019] The present invention has the following beneficial effects:

[0020] (1) The intake silencer can achieve an effective noise reduction effect of about 15dB in the low, medium and high frequency ranges while controlling the structural size.

[0021] (2) The intake silencer is not limited by the structural size, but has effective noise reduction performance in the entire frequency band, which has certain practical value for engineering applications.

[0022] (3) The air intake muffler is easy to disassemble and assemble, which is convenient for disassembly, inspection and replacement of the air intake filter of the diesel generator set, as well as inspection and replacement of the sound-absorbing material inside the air intake muffler. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a three-dimensional schematic diagram of the structure of the detachable air intake muffler of the present invention;

[0024] Figure 2 It is a top-sectional view of the invented detachable intake muffler structure. DETAILED DESCRIPTION

[0025] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0026] like Figure 1 As shown in Figure 2, a detachable air intake silencer provided in an embodiment of the present invention includes a detachable sound absorbing plate 3, a silencer louver 2, a metal frame 1, a fixed panel 4, and a sealing gasket 5.

[0027] A detachable sound absorbing plate 3 is installed at the inlet of the detachable intake muffler, which is at a certain angle to the horizontal direction of the intake air. This design increases the sound absorption conditions of the sound absorbing plate. At the same time, detachable sound absorbing plates 3 made of the same material are installed on the left, right, top and rear sides of the intake muffler. This design improves the noise reduction performance of the intake muffler to a certain extent.

[0028] The internal sound absorbing material of the detachable sound absorbing panel 3 is a foam aluminum plate. The surface of the detachable sound absorbing panel 3 is covered with a rigid panel of a certain thickness to ensure that the sound absorbing panel is not polluted and increase the strength of the structure. In addition, the four large-sized panels and silencer shutters of the intake muffler are designed to be detachable to facilitate cleaning and maintenance of the foam aluminum sound absorbing panel.

[0029] Preferably, fixed panels 4 are installed on the other three surfaces of the inlet of the air intake muffler except the surface on which the detachable sound absorbing panel is installed.

[0030] Preferably, a silencer shutter 2 is installed inside the inlet of the air intake silencer.

[0031] Preferably, the sound-absorbing louver 2 is installed in the metal frame 1 through the metal insert 7 to form a detachable sound-absorbing louver.

[0032] Preferably, a sealing gasket 5 is provided between the detachable sound absorbing panel 3 and the metal frame 1 .

[0033] Preferably, a handle 6 is provided on the detachable sound absorbing panel 3 .

[0034] Preferably, the detachable air intake muffler is installed on the diesel generator set air intake filter through the machine feet 8 and the sealing rubber pad 9 on the metal frame 1.

[0035] Through the simulation calculation of the noise reduction performance, it is estimated that the detachable air intake silencer has a noise reduction effect of nearly 15dB in the range of 20-4000Hz. The device can take into account both the smaller structural size and the effective low-frequency noise control, and has certain practical value for engineering applications.

Claims

1. A detachable air intake muffler, characterized in that: It includes silencer louvers, metal frames, fixed panels, and sound-absorbing panels. Removable sound-absorbing panels are installed at the entrance of the air intake silencer and on the left, right, upper, and rear surfaces.

2. The detachable air intake muffler according to claim 1, characterized in that: The internal sound-absorbing material of the detachable sound-absorbing panel is a foam aluminum plate.

3. The detachable intake muffler according to claim 2, characterized in that: The surface of the removable sound-absorbing panel is covered with a rigid panel of a certain thickness.

4. The detachable air intake muffler according to claim 1, characterized in that: The detachable sound absorbing panel is installed at the inlet of the air intake muffler at a certain angle to the horizontal direction of the air intake.

5. The detachable air intake muffler according to claim 1, characterized in that: Fixed panels are installed on the other three surfaces of the inlet of the air intake muffler except the surface on which the detachable sound absorbing panel is installed.

6. The detachable air intake muffler according to claim 1, characterized in that: The metal frame houses the silencer shutters at the inlet of the air intake silencer.

7. The detachable air intake muffler according to claim 6, characterized in that: The sound-absorbing louver is installed in the metal frame through the metal insert to form a detachable sound-absorbing louver.

8. The detachable air intake muffler according to claim 1, characterized in that: A sealing gasket is arranged between the detachable sound absorbing panel and the metal frame.

9. The detachable air intake muffler according to claim 1, characterized in that: The removable sound absorbing panel is provided with a handle.

10. The detachable air intake muffler according to any one of claims 1 to 9, characterized in that: The detachable air intake muffler is installed on the diesel generator set air intake filter through the machine feet on the metal frame and the sealing rubber pad.

Images