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An adaptive bipolar micro-perforated plate muffler
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A micro-perforated plate, self-adaptive technology, applied in mufflers, machines/engines, mechanical equipment, etc., can solve the problems of difficult processing, difficult to adapt to different frequency noise sources, etc.
Active Publication Date: 2020-02-07
HEFEI UNIV OF TECH
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Problems solved by technology
[0004] In industrial pipeline noise reduction, the sound-absorbing structure of the micro-perforated plate generally appears in the form of a micro-perforated tube, which is not only difficult to process, but also due to its relatively fixed structure, different working conditions (such as the speed of the fan) in the project vary. The anechoic environment of frequency noise is difficult to adapt to noise sources of different frequencies. In view of these problems, it is necessary to propose a new structure of the muffler
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Embodiment 1
[0026] see figure 1 As shown, the self-adaptive bipolar micro-perforated plate muffler of the embodiment of the present invention includes an air intake pipe 1, a sliding sleeve 2, an end cover 3, a left micro-perforated plate 4, a main pipe 5, a right micro-perforated plate 6, and an exhaust pipe 7, and the displacement adjustment device.
[0027] The left end of the main pipe 5 has an end cap 3, and the right end has a right side wall (not shown), and the cavity in the main pipe 5 serves as an expansion chamber of the muffler.
[0028] A left micro-perforated plate 4 is installed at a certain distance from the end cover 3 in the cavity of the main pipeline 5, and a right micro-perforated plate 6 is installed at a certain distance from the right side wall in the cavity of the main pipeline 5, and the left micro-perforated plate 4 is connected to the end cover. The cavity formed between the cover 3, the cavity formed between the left micro-perforated plate 4 and the right mic...
Embodiment 2
[0036] The difference between this embodiment and Embodiment 1 is that the motor 11 is a servo motor, and a baffle (not shown in the figure) is arranged on the left end of the sliding sleeve 2, and a screw rod is fixed on the output shaft of the motor 11, and a baffle is provided on the baffle. There is an inner screw hole matched with the external thread of the screw, the screw is screwed into the inner screw hole, the controller 12 controls the motor 11, and the rotation of the output shaft of the motor 11 drives the screw to rotate, thereby driving the baffle in the axial direction of the sliding sleeve 2 Direction movement, thereby driving the left and right movement of the left micro-perforated plate 4, and then adjusting the depth of the cavity formed between the left micro-perforated plate 4 and the end cover 3.
Embodiment 3
[0038] see Figure 5 , the difference between this embodiment and Embodiment 1 is that the left and right sides of the main pipe 5 are provided with displacement adjustment devices, and the right side wall of the main pipe 5 is also arranged as an end cap structure, and the end cap and the main pipe 5 The space can be connected by fastening screws to facilitate the installation of other parts. The displacement adjustment device on the right is used to control the depth of the cavity formed between the right micro-perforated plate 6 and the right end cover, thereby adjusting the muffler performance of the muffler.
[0039] The structure of the displacement adjustment device on the left and right sides can be the same, and the structure of the displacement adjustment device in Embodiment 1 or Embodiment 2 can be adopted, and the structure of the displacement adjustment device on the left and right sides can also be different, as one of them adopts the displacement adjustment devi...
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Abstract
The invention discloses a self-adaptive bipolar micro-perforated plate muffler. The left end of a main pipeline is provided with an end cover, and the right end of the main pipeline is provided with aright side wall; a left micro-perforated plate is additionally arranged at a certain distance from the end cover in a cavity of the main pipeline; a right micro-perforated plate is additionally arranged at a certain distance from the right side wall in the cavity of the main pipeline; an air inlet pipeline is inserted into the cavity of the main pipeline from the end cover of the main pipeline; the right end of the air inlet pipeline penetrates out of the left micro-perforated plate; an exhaust pipeline is inserted into the cavity of the main pipeline from the right side wall of the main pipeline; the left end of the exhaust pipeline penetrates out of the right micro-perforated plate; and a displacement adjusting device is used for adjusting the cavity depth between the left micro-perforated plate and the end cover or adjusting the cavity depth between the right micro-perforated plate and the right side wall. Compared with the prior art, the self-adaptive bipolar micro-perforated plate muffler has the advantages that the muffler can adapt to noise reduction environments with different frequency noises of a noise source due to different working conditions in engineering.
Description
technical field [0001] The present invention relates to noiseelimination technology, and more specifically relates to a micro-perforated plate muffler. Background technique [0002] The basic acoustic unit of the sound-absorbing structure of the micro-perforated plate is a cavity and a micro-perforation. It uses the acoustic resistance of the micro-perforation combined with the resonance of the cavity to absorb sound energy without adding additional sound-absorbing materials. It is a green and environmentally friendly sound-absorbing structure. . [0003] The micro-perforated plate muffler is a muffler lined with a micro-perforated plate structure, which can eliminate airflow noise in a wide frequency range. It has high temperature resistance, oil resistance, corrosion resistance and other properties. Due to the small diameter of the perforation and the smooth surface of the plate, the resistance loss of the muffler is smaller than that of the general resistive muffler. M...
Claims
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Application Information
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