CN218934742U - Microperforated Roots blower muffler - Google Patents

Abstract

The utility model discloses a micro-perforated Roots blower silencer, which comprises a sheet metal box body, wherein noise reduction and sound absorption materials are arranged on the inner wall of the sheet metal box body, a Roots blower is arranged on the inner bottom wall of the sheet metal box body through bolts, an air inlet silencer is connected to the top of the Roots blower through bolts and penetrates through the top wall of the sheet metal box body, a second sound absorption coating is arranged on the inner wall of the air inlet silencer, a support frame is arranged outside the air inlet silencer, a silencing cap is arranged on the top of the support frame and sleeved on the outer side of the top end of the air inlet silencer, an air inlet is formed in the bottom wall of the silencing cap, and the air inlet is positioned on one side of the support frame.

Description

Microperforated Roots blower muffler

Technical Field

The utility model relates to the technical field of noise reduction of Roots fans, in particular to a microperforated Roots fan silencer.

Background

Roots blower is a commonly used air supply device in factory production, but the noise pollution of the Roots blower is serious, and the Roots blower causes great harm to the environment and human body. Roots blower noise is primarily derived from three aspects of mechanical noise, electromagnetic noise, and airflow noise. Among these factors, the most harmful to the human body is the highest with the intensity of the air flow noise. The air flow noise is generated by the rotation of the fan blades in the Roots blower to squeeze air and drive the air flow to form a turbine shape, and the noise is weakened in multiple aspects.

The defects of the Roots blower silencer in the prior art are that:

the existing silencing technology of the Roots blower is simply to add a simple resistive silencer filled with rock wool at an inlet and an outlet, and has very limited noise reduction effect on low-frequency noise of the Roots blower.

Disclosure of Invention

The utility model aims to provide a microperforated Roots blower silencer to solve the problems in the prior art.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides a microperforated roots fan muffler, includes the panel beating box, the inner wall of panel beating box is provided with noise reduction sound absorbing material, the roots fan is installed through the bolt to the inboard diapire of panel beating box, there is the air inlet muffler at the top of roots fan through bolted connection, and the air inlet muffler runs through the roof of panel beating box, the second sound absorbing paint is installed to the inner wall of air inlet muffler, the externally mounted of air inlet muffler has the support frame, the amortization cap is installed at the top of support frame, and amortization cap cover is in the top outside of air inlet muffler, the diapire of amortization cap begins to have the air intake, and the air intake is located one side of support frame.

Preferably, the first sound absorbing coating is installed on the inner wall of the silencing cap, and the first microperforated panel is installed on the inner side of the silencing cap.

Preferably, a second microperforated panel is installed inside the air intake silencer.

Preferably, the top of the sheet metal box body is provided with a box top radiator in a penetrating mode, and the box top radiator is located on one side of the air inlet silencer.

Preferably, the base is installed to the bottom of panel beating box.

Preferably, the output end of the Roots blower is provided with a connecting pipe, the connecting pipe penetrates through the outer wall of one side of the sheet metal box body, one end of the connecting pipe is provided with a flexible connection, and one end of the flexible connection is provided with an air outlet silencer.

Preferably, side radiators are arranged on the outer walls of the two sides of the sheet metal box body, and the side radiators are positioned in front of and behind the connecting pipe.

Compared with the prior art, the utility model has the following beneficial effects:

1. according to the utility model, the first sound-absorbing paint, the two groups of first microperforated plates, the second sound-absorbing paint and the second microperforated plates are arranged in the sound-absorbing cap, the first sound-absorbing paint absorbs noise generated by movement of internal air flow, and meanwhile, vibration of the inner cavities of the two groups of first microperforated plates converts energy into heat, so that a sound-absorbing function is achieved, meanwhile, the second sound-absorbing paint and the second microperforated plates are arranged on the inner side of the air inlet silencer, noise is reduced by the second sound-absorbing paint and the second microperforated plates, after the noise reduction treatment is carried out in the microperforated silencer, the generation and the propagation of the noise are greatly reduced, the air flow is not influenced, the resistance loss is smaller, so that the purpose of reducing the noise is achieved and achieved, and meanwhile, the air outlet silencer is arranged at the output end of the Roots blower, the noise is reduced by the air outlet silencer, and the propagation of low-frequency noise is reduced to the greatest extent.

2. According to the utility model, the noise-reducing and sound-absorbing material is arranged and attached to the inner side of the sheet metal box body to form the sound-insulating structure, and the noise-reducing and sound-absorbing material is the sound-absorbing material with a special acoustic noise-reducing structure, so that the mechanical and electromagnetic noise generated by a fan and a motor can be effectively reduced.

Drawings

FIG. 1 is an overall perspective view of the present utility model;

FIG. 2 is a schematic view of the whole cross-sectional structure of the present utility model;

FIG. 3 is a schematic top view of the present utility model;

FIG. 4 is a schematic side view of the present utility model;

fig. 5 is a schematic view of the structure of the silencing cap of the present utility model.

In the figure: 1. an air outlet silencer; 2. a silencing cap; 201. a first microperforated panel; 202. a first sound-absorbing coating; 203. an air inlet; 3. soft connection; 4. an air intake silencer; 401. a second sound-absorbing coating; 402. a second microperforated panel; 5. roots blower; 501. a connecting pipe; 6. a sheet metal box; 601. a base; 7. a roof radiator; 8. noise reduction and sound absorption materials; 9. a side radiator; 10. and (5) supporting frames.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "upper", "lower", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific direction, be configured and operated in the specific direction, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "provided," "connected," and the like are to be construed broadly, and may be fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

Referring to fig. 1, 2, 3, 4 and 5, a microperforated roots blower muffler,

comprises a metal plate box body 6, the inner wall of the metal plate box body 6 is provided with a noise reduction and sound absorption material 8, the noise reduction and sound absorption material 8 is fixed on the inner wall of the metal plate box body 6, the stability of the noise reduction and sound absorption material 8 is ensured, the noise reduction and sound absorption material 8 is attached to the inner side of the metal plate box body 6 to form a sound insulation structure, the noise reduction and sound absorption material 8 is the sound absorption material of a special acoustic noise reduction structure, the mechanical and electromagnetic noise generated by a fan and a motor can be effectively reduced, the bottom wall of the inner side of the metal plate box body 6 is provided with a Roots blower 5 through bolts, the top of the Roots blower 5 is connected with an air inlet silencer 4 through bolts, the air inlet silencer 4 penetrates through the top wall of the metal plate box body 6, the inner wall of the air inlet silencer 4 is provided with a second sound absorption coating 401, the inner part of the air inlet silencer 4 is provided with a second micropunching plate 402, the outer part of the air inlet silencer 4 is provided with a supporting frame 10, the top of the support frame 10 is provided with a silencing cap 2, the silencing cap 2 is sleeved outside the top end of the air inlet silencer 4, the bottom wall of the silencing cap 2 is provided with an air inlet 203, the air inlet 203 is positioned at one side of the support frame 10, the inner wall of the silencing cap 2 is provided with a first sound absorbing paint 202, the inner side of the silencing cap 2 is provided with a first micropunching plate 201, the running input end of the Roots blower 5 generates suction force, the input end of the Roots blower 5 is connected with the air inlet silencer 4, the top of the air inlet silencer 4 is fixed to the silencing cap 2 at the top through the support frame 10, the stability of the silencing cap 2 is ensured, after the Roots blower 5 sucks air inside the air inlet silencer 4, the air inlet silencer 4 is in a negative pressure state, the air inlet silencer 4 sucks air inside the silencing cap 2 during negative pressure, the air inlet silencer 2 sucks outside air through the air inlet 23, in the in-process that the air got into, can produce the noise, the inside first sound absorbing paint 202 that sets up of amortization cap 2 and two sets of first microperforated plates 201, the noise that produces is absorbed inside air current removal by first sound absorbing paint 202, the vibrations of the inside cavity of two sets of first microperforated plates 201 are energy conversion into heat simultaneously, thereby play the amortization function, the inside that the air got into the air inlet muffler 4, the inboard of air inlet muffler 4 sets up second sound absorbing paint 401 and second microperforated plates 402, by the inside noise reduction of second sound absorbing paint 401 and second microperforated plates 402, after the sound reduction treatment of the inside sound of microperforated muffler, greatly reduced noise's production and propagation, and do not influence the air current and pass through, resistance loss is less, thereby realize and reach the purpose of noise reduction, connecting pipe 501 is installed to the output of Roots fan 5, connecting pipe 501 runs through the outer wall of one side of panel beating box 6, soft connection 3 is installed to the one end of connecting pipe 501, after the air is inhaled to the inside of air inlet muffler 4, by connecting pipe 501 export, with the inside that the air is passed through soft connection 3 to the inside sound absorbing muffler 1, the inside sound absorbing paint that the inside of air that the same two sets up the sound absorbing paint that produces noise and the inside the microperforated plates that the noise.

The top of panel beating box 6 runs through and installs roof radiator 7, and roof radiator 7 at top is fixed to panel beating box 6, guarantees that roof radiator 7 can steady operation, and roof radiator 7 is with outside low temperature air input, reduces the inside temperature of panel beating box 6, realizes the purpose of cooling, and roof radiator 7 is located one side of air inlet muffler 4, base 601 is installed to the bottom of panel beating box 6, side radiator 9 is installed to the both sides outer wall of panel beating box 6, and side radiator 9 is located the place ahead and the rear of connecting pipe 501, and side radiator 9 is installed in panel beating box 6 both sides, and side radiator 9 is with inside gaseous discharge, guarantees the usually of air current transmission for the radiating rate.

Working principle: the operation input end of the Roots blower 5 generates suction force, the input end of the Roots blower 5 is connected with the air inlet silencer 4, the top of the air inlet silencer 4 is fixed on the silencing cap 2 at the top through the supporting frame 10 to ensure the stability of the silencing cap 2, after the Roots blower 5 sucks air in the air inlet silencer 4, the air inlet silencer 4 sucks air in the silencing cap 2 when in negative pressure, the silencing cap 2 sucks outside air into the air inlet 23, noise is generated in the air inlet process, a first sound absorbing paint 202 and two groups of first microperforated panels 201 are arranged in the silencing cap 2, the noise generated by the movement of the air flow in the first sound absorbing paint 202 is absorbed, and simultaneously, the vibration of the inner cavities of the two groups of first microperforated panels 201 converts energy into heat, thereby play the amortization function, the inside that air entered into air inlet muffler 4, the inboard of air inlet muffler 4 sets up second sound absorbing paint 401 and second microperforated panel 402, by second sound absorbing paint 401 and second microperforated panel 402 noise reduction, the inside sound noise reduction that makes of microperforated muffler is handled the back, greatly reduced noise's production and propagation, and do not influence the air current and pass through, resistance loss is less, thereby realize and reach the purpose of noise reduction, roots blower 5 draws the gas back, by connecting pipe 501 output, connecting pipe 501 is with the inside that gas transmitted air-out muffler 1 through flexible coupling 3, the inside of air-out muffler 1 is provided with sound absorbing paint and two sets of microperforated panels equally, reach the noise that the relative inside air current produced.

It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present utility model may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims (7)

1. The utility model provides a microperforated roots fan muffler, includes panel beating box (6), its characterized in that: the inner wall of panel beating box (6) is provided with noise reduction and inhales sound material (8), roots blower (5) are installed through the bolt to the inboard diapire of panel beating box (6), there is air inlet muffler (4) at the top of Roots blower (5) through bolted connection, and air inlet muffler (4) run through the roof of panel beating box (6), second sound absorbing paint (401) are installed to the inner wall of air inlet muffler (4), support frame (10) are installed to the externally mounted of air inlet muffler (4), amortization cap (2) are installed at the top of support frame (10), and amortization cap (2) cover is in the top outside of air inlet muffler (4), the diapire of amortization cap (2) begins to have air intake (203), and air intake (203) are located one side of support frame (10).

2. The microperforated roots blower muffler of claim 1, wherein: the inner wall of the silencing cap (2) is provided with a first sound absorbing coating (202), and the inner side of the silencing cap (2) is provided with a first microperforated panel (201).

3. The microperforated roots blower muffler of claim 2, wherein: the second microperforated panel (402) is arranged in the air inlet silencer (4).

4. A microperforated roots blower muffler according to claim 3, wherein: the top of panel beating box (6) runs through and installs roof radiator (7), and roof radiator (7) are located one side of air inlet muffler (4).

5. The microperforated roots blower muffler of claim 4, wherein: the bottom of the metal plate box body (6) is provided with a base (601).

6. The microperforated roots blower muffler of claim 5, wherein: the output end of roots fan (5) is installed connecting pipe (501), and connecting pipe (501) runs through one side outer wall of panel beating box (6), and flexible coupling (3) are installed to one end of connecting pipe (501), and air-out muffler (1) are installed to one end of flexible coupling (3).

7. The microperforated roots blower muffler of claim 6, wherein: side radiators (9) are arranged on the outer walls of the two sides of the sheet metal box body (6), and the side radiators (9) are located in front of and behind the connecting pipe (501).

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