CN214221501U

CN214221501U - Silencer device for double-screw air compressor

Info

Publication number: CN214221501U
Application number: CN202023192488.2U
Authority: CN
Inventors: 吴赛赛; 王开专
Original assignee: Mann and Hummel Filter Shanghai Co Ltd
Current assignee: Mann and Hummel Filter Shanghai Co Ltd
Priority date: 2020-12-27
Filing date: 2020-12-27
Publication date: 2021-09-17
Anticipated expiration: 2030-12-27

Abstract

The utility model relates to a silencer device for a double-screw air compressor, which comprises a silencer and a connecting structure, wherein the silencer is connected with the head of the air compressor through the connecting structure; the silencer comprises an upper shell, a lower shell and a central pipe, wherein the upper shell and the lower shell are connected to form a sealed cavity, and the central pipe is arranged in the cavity formed by the upper shell and the lower shell; the center tube includes a plurality of resistance resonant cavities of different volumes and a resistive material resonant cavity, the resistance resonant cavity is close to air compressor machine one end sets up, just a plurality of resistance resonant cavities of different volumes from being close to air compressor machine one end is to outer volume diminishing gradually. The utility model discloses silencer device has wide band, high noise elimination volume, adjustable noise elimination frequency, standardization, and easy dismounting, the good advantage of gas tightness.

Description

Silencer device for double-screw air compressor

Technical Field

The utility model relates to a technical field of making an uproar falls in the car noise elimination, concretely relates to a silencer device for double screw air compressor.

Background

Noise caused by the operation characteristics of the air compressor seriously puzzles the physical and mental health of people in an application scene, and with the continuous expansion of the application scene range of the industrial air compressor, the forced requirement of background noise is provided for part of working environments, so that the noise and even the sound quality are gradually listed as important indexes for developing the air compressor in the industry of the air compressor, and the noise reduction becomes an important and battle-choosing work.

At present, for a double-screw air compressor, a silencer is less in application and has a single main noise reduction mode, and the silencer is mainly filled with simple acoustic materials on the inner surface of a shell of the air compressor or is a simple cylindrical expansion type silencer, so that the noise reduction mode has high cost requirement and an unobvious noise reduction effect; secondly, the noise problem caused by the operating characteristic of the double screw is very serious, the noise characteristic is mostly medium and low frequency mechanical noise with a wider frequency band, and the low frequency problem is serious.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a silencer device for two screw air compressor in order to solve the not good problem of two screw air compressor machine noise reduction effect.

The purpose of the utility model is realized through the following technical scheme:

a silencer device for a double-screw air compressor comprises a silencer and a connecting structure, wherein the silencer is connected with a machine head of the air compressor through the connecting structure;

the silencer comprises an upper shell, a lower shell and a central pipe, wherein the upper shell and the lower shell are connected to form a sealed cavity, and the central pipe is arranged in the cavity formed by the upper shell and the lower shell;

the center tube includes a plurality of resistance resonant cavities of different volumes and a resistive material resonant cavity, the resistance resonant cavity is close to air compressor machine one end sets up, just a plurality of resistance resonant cavities of different volumes from being close to air compressor machine one end is to outer volume diminishing gradually.

Further, the casing is cascaded sleeve structure down, and the diameter is close to from the air compressor machine one end is toward reducing outward gradually, the center tube is the pipe, fluting or trompil on the center tube, the outer wall of center tube is equipped with a plurality of baffles perpendicularly, the baffle with the cascaded sleeve structure phase-match of casing down is close to from the air compressor machine one end is toward reducing outward gradually, forms different resonance chamber in proper order. The cavity and the partition board are in interference clamping connection, so that the sealing of the cavity is guaranteed.

Further, the reactive resonant cavity comprises at least one slotted reactive resonant cavity and a plurality of round-holed reactive resonant cavities.

Further, the opening rate of the opening in the cavity of the reactive resonant cavity is 60% -90%.

Furthermore, the size of a round hole in the round hole resistance resonant cavity is 3-5mm, and the distance between the round hole and the partition plate is at least 3 mm; and the distance between the slotted resistance resonant cavity and the partition plate is at least 3 mm.

Further, the resistive material resonant cavity is filled with acoustic materials.

Further, the acoustic material is fixed in the resistive material resonant cavity through an axial fixing structure, an elbow fixing structure or a circumferential fixing structure.

Further, the thickness of the acoustic material is 10-50 mm.

Further, connection structure includes coupling hose and clamp, coupling hose's both ends are passed through respectively the clamp with silencer and air compressor machine aircraft nose sealing connection.

Further, coupling hose is the rubber coupling pipe of reducing, go up the casing and be connected with adopting the bolt between the casing down, convenient and the leakproofness is good.

The specific working principle is that the air compressor is dragged by the motor, the air compressor starts to operate, air is filtered into clean air through the air filter, the clean air enters the hose from the atmosphere end, the clean air enters the machine head of the air compressor through the silencer, and finally air compression is carried out. The noise transmission and the air compression of noise are opposite direction simultaneously, the noise that produces under the stable rotational speed of air compressor machine and the pressure, mainly be the mechanical noise of low frequency range, inside getting into standard silencer through the aircraft nose, the sound wave passes through resistant structure aperture, the effect of square groove and resistive acoustic material, the noise obtains the decay of corresponding frequency, the noise passes through the hose afterwards and enters into air cleaner, the import through the filter is transmitted away, and for main transfer path, the noise is the part through the pipeline in addition, air compressor machine body surface radiation transmits away.

Compared with the prior art, the utility model has the characteristics of it is following:

1. broadband, high noise damping: the resistance and the reactive muffler are combined, so that the noise elimination device can act on noise in different frequency ranges, broadens the noise elimination frequency range of the muffler, improves the noise elimination amount to a certain extent, has acoustic performances as shown in figure 9, 500-1500Hz (20dB), 1500-2000Hz (15dB) and 2000-3500Hz (10dB), and can cover the acoustic problems of a plurality of double-screw air compressors;

2. the noise elimination frequency can be adjusted: the silencer is divided into an upper shell, a lower shell and a central tube, different silencing frequency bands can be adjusted through the change design of punching and slotting the central tube, so that the requirements of the same air compressor interface size except the multi-type double-screw silencer can be met, and the function can be realized only by replacing the central tube;

3. standardization, easy dismounting and good air tightness: this silencer and connection structure can satisfy design boundary and connection demand, and casing, center tube and connection structure have all been standardized about the silencer, and the connected mode of rubber tube and double cassette hub is very convenient in the aspect of changing dismouting silencer, can guarantee to be connected with large-traffic air compressor machine aircraft nose gas tightness good performance.

Drawings

Fig. 1 is a schematic diagram of an explosion structure of the muffler device of the present invention;

fig. 2 is a schematic view of an assembly structure of the muffler device of the present invention;

FIG. 3 is a schematic view of positioning of an eight-claw lotus structure;

FIG. 4 is a sectional view taken along line A-A of FIG. 3;

FIGS. 5-8 are cross-sectional views of the attachment of acoustic material within a resistive material cavity;

fig. 9 is a schematic structural view of a specific application of the muffler device of the present invention;

FIG. 10 is a graph of transmission loss for a standard muffler;

in the figure: 1-air compressor head; 2, clamping a hoop; 3-a bushing; 4-lotus eight-grab structure; 5-an upper shell; 6-a central tube; 7-a lower shell; 8. 9, 10, 11, 12-partitions; 13. 14, 15, 16-round-hole resistance resonant cavity; 17-grooving and round hole resistant resonant cavities; 18-an acoustic material; 19-structure of the partition and chamber fit; 20-an axial fixation structure; 21-elbow fixing structure; 22-circumferential fixation structure; 23-partition square groove fixing structure 100-motor; 200-an air compressor; 300-rubber connecting pipe and clamping hub; 400-a muffler; 500-rubber connecting pipe and clamping hub; 600-connecting a hose; 700-air filter.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

As shown in fig. 1 and 2, a silencer device for a twin-screw air compressor comprises a silencer and a connecting structure, wherein the silencer is connected with an air compressor head 1 through the connecting structure, the silencer comprises an upper shell 5, a lower shell 7 and a central pipe 6, the upper shell 5 is connected with the lower shell 7 to form a sealed cavity, and the central pipe 6 is installed inside the cavity formed by the upper shell 5 and the lower shell 7; the center tube 6 comprises a plurality of resistance resonant cavities with different volumes and a resistance material resonant cavity, the resistance resonant cavities are arranged near one end of the air compressor 200, and the resistance resonant cavities with different volumes gradually reduce from one end near the air compressor to the outside.

Wherein, casing 7 is cascaded sleeve structure down, and the diameter is from being close to 1 one end of air compressor machine aircraft nose and toward reducing outward gradually, and center tube 6 is the pipe, fluting or trompil on the center tube 6, and the outer wall of center tube 6 is equipped with a plurality of baffles perpendicularly, and this embodiment is equipped with 5, is

baffle

8, 9, 10, 11, 12 respectively, and baffle and casing 7's cascaded sleeve structure phase-match down are from being close to air compressor machine one end and toward reducing outward gradually, form different resonance cavity in proper order.

The reactive resonant cavity comprises at least one grooved reactive

resonant cavity

17 and 4

circular holes

13, 14, 15 and 16, and the opening rate of the holes in the reactive resonant cavity is 60-90%, so that an ideal acoustic effect can be achieved. The size of a round hole in the round hole-punched resistant resonant cavity is 3-5mm, and the distance between the round hole and the partition plate is at least 3 mm; the grooved reactive resonant cavity is at least 3mm away from the partition plate, so that acoustic subjective problems can be well guaranteed.

Acoustic material 18 is filled and filled in the resistive material resonant cavity, the thickness of the acoustic material is 10-50mm, as shown in fig. 5-8, the acoustic material 18 is fixed in the resistive material resonant cavity through an axial fixing structure, an elbow fixing structure, a circumferential fixing structure or a partition plate square groove fixing structure, the axial fixing structure, the circumferential fixing structure and the partition plate square groove fixing structure are suitable for BG + similar materials, the elbow fixing structure is suitable for the acoustic material similar to non-woven fabrics, and the structure can well avoid the problems of material falling and fixing during assembly.

As shown in figures 3 and 4, 2 positioning structures of the lotus eight-claw structure can meet the positioning requirements of 5 different machines. Connection structure includes that bush 3, clamp 2 and lotus flower eight grab structure 4, and bush 3 grabs structure 4 cooperation with lotus flower eight, respectively through clamp and silencer and 1 sealing connection of air compressor machine aircraft nose, goes up the casing and adopts vibration friction weld to seal down between the casing, and convenient and leakproofness is good.

Fig. 9 is the utility model discloses the concrete structure sketch map who uses of silencer device, 400 one end of silencer are passed through the rubber connecting pipe and are blocked hub 300 and connect at the air compressor machine 200 aircraft noses, and motor 100 is connected to air compressor machine 200, and the silencer 400 other end passes through the rubber connecting pipe and blocks hub 500 and coupling hose 600 is connected with air cleaner 700. The air compressor 200 is dragged by the motor 100, the air compressor 200 starts to operate, air is filtered into clean air through the air filter 700, the clean air enters the connecting hose 600 from the atmosphere end, the clean air enters the machine head of the air compressor 200 through the silencer 400, and finally the air is compressed. The transmission of noise is opposite direction with air compression here simultaneously, the noise that produces under the stable rotational speed of air compressor machine 200 and the pressure, mainly be the mechanical noise of low frequency range, inside getting into standard silencer through the aircraft nose, the sound wave passes through resistant structure aperture, the effect of square groove and resistive acoustic material, the noise obtains the decay of corresponding frequency, the noise passes through the hose afterwards and enters into air cleaner, transmit away through the import of filter, and be main transfer path, the noise is the pipeline in addition partly, air compressor machine body surface radiation transmits away.

The device combines the resistance muffler and the reactive muffler, can act on the noise in different frequency ranges, widens the muffling frequency range of the muffler, and improves the muffling amount to a certain extent, and the acoustics of the device are shown in figure 10, wherein the acoustics of the device are represented by 500-plus-1500 Hz (20dB), 1500-plus-2000 Hz (15dB) and 2000-plus-3500 Hz (10dB), and can cover the acoustics problem of a plurality of double-screw air compressors.

The embodiments described above are intended to facilitate the understanding and use of the invention by those skilled in the art. It will be readily apparent to those skilled in the art that various modifications to these embodiments may be made, and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the above embodiments, and those skilled in the art should make improvements and modifications within the scope of the present invention according to the disclosure of the present invention.

Claims

1. A silencer device for a double-screw air compressor is characterized by comprising a silencer and a connecting structure, wherein the silencer is connected with a machine head of the air compressor through the connecting structure;

2. The muffler device for a twin-screw air compressor of claim 1, wherein the lower housing has a stepped sleeve structure, the diameter of the lower housing gradually decreases from the end near the air compressor to the outside, the central tube is a circular tube, the central tube has a slot or an opening, the outer wall of the central tube is vertically provided with a plurality of partition boards, the partition boards are matched with the stepped sleeve structure of the lower housing, and gradually decrease from the end near the air compressor to the outside, thereby sequentially forming different resonant cavities.

3. A muffler assembly for a twin screw air compressor as defined in claim 2, wherein the resonant resistive cavity includes at least one slotted resonant resistive cavity and a plurality of perforated resonant resistive cavities.

4. A silencer assembly for a twin screw air compressor as claimed in claim 3, wherein the openings in the chambers of the resonant cavities have an opening ratio of 60% to 90%.

5. A silencer assembly for a twin screw air compressor as claimed in claim 3, wherein the size of the hole in the resistively resonant cavity of the perforated hole is 3-5mm, and the hole is at least 3mm from the baffle; and the distance between the slotted resistance resonant cavity and the partition plate is at least 3 mm.

6. The muffler apparatus for a twin screw air compressor of claim 1, wherein the resistive material resonator cavity is filled and filled with an acoustic material.

7. The muffler apparatus for a twin screw air compressor of claim 6, wherein the acoustic material is secured within the resistive material cavity by an axial securing structure, an elbow securing structure, or a circumferential securing structure.

8. A silencer assembly for a twin screw air compressor according to claim 6, wherein the acoustic material has a thickness of 10-50 mm.

9. The muffler apparatus for a twin-screw air compressor according to claim 1, wherein the connecting structure includes a connecting hose and a clamp, and both ends of the connecting hose are hermetically connected to the muffler and the head of the air compressor through the clamp, respectively.

10. The muffler apparatus for a twin-screw air compressor according to claim 9, wherein the connection hose is a variable diameter rubber connection pipe, and the upper and lower casings are connected by bolts.