CN219197640U - Roots blower muffler - Google Patents

Abstract

The utility model relates to the technical field of mufflers, in particular to a Roots blower muffler, which comprises a casing, the two ends of the casing are respectively connected with an air inlet pipe and an air outlet pipe, and two partitions are fixedly connected in the casing. The air duct is fixedly connected through the air duct, and a plurality of through holes are opened on the air duct. The inner side of the housing is fixedly connected with a perforated plate near the inner wall. The perforated plate and the inner wall of the housing are filled with sound-absorbing cotton. Filled with glass cloth; in the utility model, after the gas enters the shell from the intake pipe, it will collide with the partition plate and the air guide pipe, so that the sound energy is partially turned back, and the sound radiated by the gas can be effectively reduced through the reflection and interference of the sound energy. It can achieve the purpose of noise reduction. In addition, the sound-absorbing cotton can absorb part of the noise. At the same time, the perforated plate and glass cloth are used as the protective layer of the sound-absorbing cotton to prevent the sound-absorbing cotton from being carried away by the air flow; It is not taken away by the impact of high-pressure gas, which improves the noise reduction effect.

Description

A Roots blower silencer

technical field

The utility model relates to the technical field of silencers, in particular to a Roots blower silencer.

Background technique

Roots blower is a constant flow fan, and its noise is the loudest among fans. Each Roots blower will be equipped with a silencer to reduce the noise of the fan.

Roots fan mufflers generally use fillers such as sound-absorbing cotton, which absorb noise through the porous structure of the filler material, and reduce the noise at the outlet of the Roots fan. A Chinese utility model patent of CN217270838U as a Roots blower silencer uses iron filings to form a porous sound-absorbing filler. However, the filling material in this type of muffler tube is easy to fall off under the impact of high-pressure gas, and enters the system with the gas, damaging system components, and will reduce the muffler effect and service life of the muffler tube after long-term use.

Utility model content

The purpose of the utility model is to provide a Roots blower muffler, which can protect the muffler filler from being taken away by the impact of high-pressure gas and improve the muffler effect.

In order to achieve the above object, the technical scheme of the utility model is as follows:

A Roots blower muffler, comprising a housing, the two ends of the housing are respectively connected with an air inlet pipe and an air outlet pipe, and two partitions are fixedly connected in the housing, and guide rails are fixedly connected through the partitions. A trachea, a plurality of through holes are opened on the air guide tube, a perforated plate is fixedly connected to the inner side of the housing close to the inner wall, and sound-absorbing cotton is filled between the perforated plate and the inner wall of the housing, and the sound-absorbing cotton and the perforated The plates are filled with glass cloth.

Further, one end of the air inlet pipe extends into the housing and is provided with a plurality of air inlet holes, and one end of the air outlet pipe extends into the housing and is provided with a plurality of air outlet holes.

Further, two filter screens are fixedly connected in the intake pipe, and filter cotton is arranged between the two filter screens.

Further, the sound-absorbing wool is glass wool.

Further, the two air guide tubes are arranged non-coaxially.

The beneficial effects of the utility model are:

After the gas enters the shell from the intake pipe, it will collide with the baffle and the air guide pipe, causing the sound energy to partially turn back. Through the reflection and interference of the sound energy, the sound energy radiated by the gas can be effectively reduced to achieve the purpose of noise reduction. The sound-absorbing cotton can absorb part of the noise, and at the same time, the protective layer of the sound-absorbing cotton is made of a perforated plate and glass cloth to prevent the sound-absorbing cotton from being taken away by the air flow; Improve the noise reduction effect.

Description of drawings

Fig. 1 is the three-dimensional structure schematic diagram of the present utility model;

Fig. 2 is a sectional view of the utility model.

Reference signs: shell 1; air intake pipe 2; air outlet pipe 3; partition plate 4; air guide pipe 5; through hole 6; perforated plate 7; sound-absorbing cotton 8; glass cloth 9; Net 12; Filter cotton 13.

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. 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.

As shown in Figures 1 and 2, a Roots fan muffler includes a housing 1, the two ends of the housing 1 are respectively connected with an air inlet pipe 2 and an air outlet pipe 3, and the housing 1 is fixedly connected with two A partition 4, the partition 4 is fixedly connected with an air guide tube 5, the air guide tube 5 is provided with a plurality of through holes 6, and the inner side of the housing 1 is fixedly connected with a perforated plate 7 close to the inner side wall, so Sound-absorbing cotton 8 is filled between the perforated plate 7 and the inner wall of the housing 1 , and glass cloth 9 is filled between the sound-absorbing cotton 8 and the perforated plate 7 .

After the gas enters the shell from the intake pipe 2, it will collide with the partition plate 4 and the air guide pipe 5, so that the sound energy is partially turned back. Through the reflection and interference of the sound energy, the sound energy radiated by the gas can be effectively reduced to achieve the effect of noise reduction. Purpose, the air duct 5 is provided with a plurality of through holes to change the direction of the air flow, so that the sound energy entering the air duct 5 cancels out each other, reduces the sound energy, and can absorb part of the noise through the sound-absorbing cotton 8 provided. The perforated plate 7 and the glass cloth 9 are used as the protective layer of the sound-absorbing cotton 8 to prevent the sound-absorbing cotton 8 from being taken away by the air flow; the utility model can protect the sound-absorbing filler from being taken away by the impact of high-pressure gas, and improves the sound-absorbing effect.

One end of the air intake pipe 2 extends into the housing 1 and is provided with a plurality of air intake holes 10 , and one end of the air outlet pipe 3 extends into the housing 1 and is provided with a plurality of air outlet holes 11 ; Flowing through the air inlet 10 and the air outlet 11, the friction generated by the airflow and the hole wall converts part of the sound energy into heat energy and dissipates it, which can effectively attenuate the transmission of noise.

Two filter screens 12 are fixedly connected in the air intake pipe 2, and filter cotton 13 is arranged between the two described filter screens 12; filter cotton 13 is set to filter the dust particles in the inhaled gas, and the filter screen 12 can prevent the filter cotton 13 from being Airflow pulses away.

The sound-absorbing cotton 8 is glass wool.

The two air guide tubes 5 are non-coaxially arranged.

Finally, it is noted that the above embodiments are only used to illustrate the technical solutions of the present utility model without limitation. Although the utility model has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the utility model can be Modifications or equivalent replacements of the technical solutions without departing from the spirit and scope of the technical solutions of the utility model shall be covered by the scope of the claims of the utility model.

Claims (5)

1. The utility model provides a roots fan muffler which characterized in that: including casing (1), the both ends of casing (1) communicate respectively has intake pipe (2) and outlet duct (3), two baffles (4) of fixedly connected with in casing (1), all fixed through-connection has air duct (5) on baffle (4), a plurality of through-holes (6) have been seted up on air duct (5), the casing (1) inboard is close to inside wall fixedly connected with perforated plate (7), it has amortization cotton (8) to fill between perforated plate (7) and casing (1) inside wall, it has glass cloth (9) to fill between amortization cotton (8) and the perforated plate (7).

2. The Roots blower muffler according to claim 1, wherein: one end of the air inlet pipe (2) extends into the shell (1) and is provided with a plurality of air inlet holes (10), and one end of the air outlet pipe (3) extends into the shell (1) and is provided with a plurality of air outlet holes (11).

3. The Roots blower muffler according to claim 1, wherein: two filter screens (12) are fixedly connected in the air inlet pipe (2), and filter cotton (13) is arranged between the two filter screens (12).

4. The Roots blower muffler according to claim 1, wherein: the silencing cotton (8) is glass cotton.

5. The Roots blower muffler according to claim 1, wherein: the two air guide pipes (5) are arranged in a non-coaxial way.

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