A multi-stage compression magnetic suspension centrifugal air compressor's silencer

Abstract

The utility model provides a kind of sound-absorbing box of multistage compression magnetic suspension centrifugal air compressor, comprising: sound-absorbing box shell, the first heat dissipation gas import is provided with in the side surface along length direction of sound-absorbing box shell, high-pressure gas import is provided with in the front side along thickness direction, second heat dissipation gas import is provided with in the bottom surface along height direction;Fixed support is welded in the left and right sides of sound-absorbing box shell along height direction upper end, exhaust air deflector is welded in the upper end of sound-absorbing box shell along height direction, and it is located in the side close to high-pressure gas import;The sound-absorbing box shell is high-pressure cavity, low-pressure cavity and confluence cavity respectively in the inside, and high-pressure cavity and low-pressure cavity are separated by middle partition.

Description

Technical Field

[0001] This utility model relates to a silencer box for a multi-stage compression magnetic levitation centrifugal air compressor. Background Technology

[0002] As a new generation of high-efficiency and energy-saving compressed air supply equipment, the magnetic levitation air compressor adopts magnetic levitation bearing technology to achieve contactless levitation operation between the rotor and stator, eliminating the frictional losses of traditional mechanical bearings. It boasts significant advantages such as compact structure, low energy consumption, and low maintenance costs. With the increasing demands for energy conservation and environmental protection in the industrial sector, magnetic levitation air compressors have been widely used in numerous industries, including food and pharmaceuticals, electronics and semiconductors, and automobile manufacturing.

[0003] Multi-stage compression magnetic levitation centrifugal air compressors use multiple centrifugal fans to cool the bearings of the magnetic levitation motor. The cooling gas is exhausted to the atmosphere, and the large flow of cooling gas generates considerable noise. Furthermore, during start-up and shutdown, the magnetic levitation centrifugal air compressor needs to open the vent valve to exhaust gas to the atmosphere, and the release of high-pressure gas also generates significant noise. Therefore, noise reduction measures are necessary for the vented gas.

[0004] Magnetic levitation centrifugal air compressors in the industry generally use simple partitioned silencers, which do not have a significant noise reduction effect. For bearing cooling gas, some even exhaust directly inside the compressor housing, which can easily cause high temperatures inside the housing, increasing the requirements for the housing's heat dissipation design. Utility Model Content

[0005] The main technical problem to be solved by this utility model is to provide

[0006] To solve the above-mentioned technical problems, this utility model provides a silencer box for a multi-stage compression magnetic levitation centrifugal air compressor, including: a silencer box shell, wherein a first heat dissipation gas inlet is provided on one side along the length direction, a high-pressure gas inlet is provided on the front side along the thickness direction, and a second heat dissipation gas inlet is provided on the bottom surface along the height direction.

[0007] The fixed brackets are welded to the upper left and right sides of the muffler housing along the height direction, and the exhaust guide plate is welded to the upper end of the muffler housing along the height direction and located on the side close to the high-pressure gas inlet.

[0008] The interior of the silencer box consists of a high-pressure chamber, a low-pressure chamber, and a manifold chamber, with a partition separating the high-pressure chamber and the low-pressure chamber.

[0009] A first perforated plate and a second perforated plate are respectively provided above and below the low-pressure cavity and the manifold cavity, and a third perforated plate and a fourth perforated plate are respectively provided around the low-pressure cavity and the manifold cavity; the space between the first perforated plate, the second perforated plate, the third perforated plate, the fourth perforated plate and the outer shell of the silencer box is filled with sound-absorbing material; the first perforated plate, the second perforated plate, the third perforated plate, and the fourth perforated plate divide the low-pressure cavity and the manifold cavity into an intermediate flow passage area and a sound-absorbing area;

[0010] The high-pressure chamber includes an inner tube, an outer tube, an intermediate baffle, a first labyrinth baffle, a second labyrinth baffle, and reinforcing ribs; the space between the outer tube and the outer shell of the silencer box and the intermediate partition, as well as the interior of the first and second labyrinth baffles, are filled with sound-absorbing material; the intermediate baffle divides the high-pressure chamber into a front cavity and a rear cavity, and the high-pressure gas first enters the front cavity of the high-pressure chamber 7 through the tube, and then enters the rear cavity of the high-pressure chamber 7 through the fan-shaped holes of the intermediate baffle; the first and second labyrinth baffles form a tortuous flow channel in the rear cavity of the high-pressure chamber.

[0011] In a preferred embodiment, the apertures of the first, second, third, and fourth orifice plates are less than 3 mm.

[0012] Compared with the prior art, the technical solution of this utility model has the following beneficial effects:

[0013] This utility model provides a silencer box for a multi-stage compression magnetic levitation centrifugal air compressor, which adopts a special silencer structure for different airflow characteristics, and achieves efficient noise reduction for high-pressure air and heat dissipation air;

[0014] This utility model provides a silencer box for a multi-stage compression magnetic levitation centrifugal air compressor, which separates and processes high-pressure exhaust gas and heat dissipation gas, avoiding mutual interference between airflows in different states and improving the operational stability of the magnetic levitation air compressor.

[0015] This utility model provides a silencer box for a multi-stage compression magnetic levitation centrifugal air compressor. It features an independent labyrinthine channel for the heat dissipation gas. While ensuring the noise reduction effect, its flow path is generally smoother and has less resistance to airflow compared to a complex impedance composite structure. This minimizes the impact of the silencer box on the normal heat dissipation of the magnetic levitation air compressor and prevents the equipment from overheating due to poor heat dissipation. Attached Figure Description

[0016] Figure 1 This is a front view of the silencer box in a preferred embodiment of the present invention;

[0017] Figure 2 for Figure 1 Sectional view at position AA;

[0018] Figure 3 for Figure 1Sectional view at position BB;

[0019] Figure 4 This is an isometric view of the silencer box in a preferred embodiment of the present invention;

[0020] Figure 5 This is a front view of the high-pressure cavity in a preferred embodiment of the present invention;

[0021] Figure 6 for Figure 5 Sectional view at position CC;

[0022] Figure 7 This is a schematic diagram showing the positional relationship between the intermediate baffle and the reinforcing rib in a preferred embodiment of the present invention;

[0023] Figure 8 This is an isometric view of the high-pressure cavity in a preferred embodiment of the present invention;

[0024] Figure 9 This is another isometric view of the high-pressure cavity in a preferred embodiment of this utility model;

[0025] Figure 10 This is a diagram showing the internal structure of the low-pressure cavity and the manifold cavity in a preferred embodiment of the present invention. Detailed Implementation

[0026] To make the technical solution and features of this utility model clearer, the following detailed description of this utility model is provided in conjunction with the accompanying drawings and specific examples. It should be understood that these examples are only for illustrating this utility model and are not intended to limit the scope of this utility model. After reading this utility model, any modifications of this utility model by those skilled in the art in various equivalent forms fall within the scope defined by the appended claims.

[0027] refer to Figures 1-10 This embodiment provides a silencer box for a multi-stage compression magnetic levitation centrifugal air compressor, including: a high-pressure gas inlet 1, a heat dissipation gas inlet 2, and a heat dissipation gas inlet 3 distributed at the front end, lower end, and left end of the silencer box shell 5. A fixing bracket 4 is welded to the left and right sides of the upper end of the silencer box shell 5, and an exhaust guide plate 6 is welded to the upper right rear side of the silencer box shell 5. The interior of the silencer box shell 5 consists of three parts: a high-pressure chamber 7, a low-pressure chamber 9, and a manifold chamber 10, with a partition 8 separating the high-pressure chamber 7 and the low-pressure chamber 9.

[0028] The first perforated plate 11, the second perforated plate 12, the third perforated plate 9-1, and the fourth perforated plate 9-4 are perforated plates with a diameter of less than 3 mm. The first perforated plate 11 and the second perforated plate 12 are located above and below the low-pressure cavity 9 and the manifold 10, respectively. The third perforated plate 9-1 and the fourth perforated plate 9-4 are located around the low-pressure cavity 9 and the manifold 10, respectively. The space between the first perforated plate 11, the second perforated plate 12, the third perforated plate 9-1, and the fourth perforated plate 9-4 and the outer shell 5 of the silencer box is filled with sound-absorbing material. The first perforated plate 11, the second perforated plate 12, the third perforated plate 9-1, and the fourth perforated plate 9-4 divide the low-pressure cavity 9 and the manifold 10 into an intermediate flow passage area and a sound-absorbing area.

[0029] The high-pressure chamber 7 employs an impedance composite silencing structure, primarily composed of an inner tube 7-1, an outer tube 7-2, an intermediate baffle 7-3, a first labyrinth baffle 7-4, a second labyrinth baffle 7-5, and reinforcing ribs 7-6. The space between the outer tube 7-2 and the outer shell 5 and the intermediate partition 8, as well as the interiors of the labyrinth baffles 7-4 and 7-5, are filled with silencing material. The reinforcing ribs 7-6 provide support for the intermediate baffle 7-3. The intermediate baffle 7-3 divides the high-pressure chamber 7 into a front chamber and a rear chamber. High-pressure gas first enters the front chamber of the high-pressure chamber 7 through the tube 7-1, and then enters the rear chamber of the high-pressure chamber 7 through the fan-shaped holes of the intermediate baffle 7-3. The labyrinth baffles 7-4 and 7-5 form tortuous flow channels in the rear chamber of the high-pressure chamber 7, further reducing noise for the gas entering the rear chamber.

[0030] The low-pressure chamber 9 employs a labyrinthine noise reduction structure. Both labyrinth baffles 9-1 and 9-2 are filled with noise-reducing material, forming a tortuous flow channel in the flow area of ​​the low-pressure chamber 9. The low-pressure chamber 9 effectively reduces noise from the low-pressure heat dissipation gas without excessively increasing airflow resistance, ensuring smooth gas flow.

[0031] The noise reduction process of the above-mentioned silencer is as follows: High-pressure exhaust gas enters high-pressure chamber 7 through high-pressure gas inlet 1, and low-pressure cooling gas enters low-pressure chamber 9 through cooling gas inlet 2 and cooling gas inlet 3. Because the intermediate partition 8 separates high-pressure chamber 7 and low-pressure chamber 9, the high-pressure exhaust gas and low-pressure cooling gas do not interfere with each other when entering the silencer for noise reduction. After passing through high-pressure chamber 7 and low-pressure chamber 9 respectively, most of the noise generated by the high-pressure exhaust gas and low-pressure cooling gas is eliminated. The high-pressure exhaust gas and low-pressure cooling gas merge in the manifold chamber. After further noise reduction in the manifold chamber, the merging gas is discharged to the atmosphere through exhaust guide plate 6.

[0032] The above is only one specific embodiment of the present utility model, but the design concept of the present utility model is not limited thereto. Any non-substantial modifications made to the present utility model using this concept shall be deemed as an infringement of the protection scope of the present utility model.

Claims

1. A silencer box for a multi-stage compression magnetic levitation centrifugal air compressor, characterized in that... include: The silencer enclosure has a first heat dissipation gas inlet on one side along the length direction, a high-pressure gas inlet on the front side along the thickness direction, and a second heat dissipation gas inlet on the bottom surface along the height direction. The fixed brackets are welded to the upper left and right sides of the muffler housing along the height direction, and the exhaust guide plate is welded to the upper end of the muffler housing along the height direction and located on the side close to the high-pressure gas inlet. The interior of the silencer box consists of a high-pressure chamber, a low-pressure chamber, and a manifold chamber, with a partition separating the high-pressure chamber and the low-pressure chamber. A first perforated plate and a second perforated plate are respectively provided above and below the low-pressure cavity and the manifold cavity, and a third perforated plate and a fourth perforated plate are respectively provided around the low-pressure cavity and the manifold cavity; the space between the first perforated plate, the second perforated plate, the third perforated plate, the fourth perforated plate and the outer shell of the silencer box is filled with sound-absorbing material; the first perforated plate, the second perforated plate, the third perforated plate, and the fourth perforated plate divide the low-pressure cavity and the manifold cavity into an intermediate flow passage area and a sound-absorbing area; The high-pressure chamber includes an inner tube, an outer tube, an intermediate baffle, a first labyrinth baffle, a second labyrinth baffle, and reinforcing ribs; the space between the outer tube and the outer shell of the silencer box and the intermediate partition, as well as the interior of the first and second labyrinth baffles, are filled with sound-absorbing material; the intermediate baffle divides the high-pressure chamber into a front chamber and a rear chamber, and the high-pressure gas first enters the front chamber of the high-pressure chamber through the tube, and then enters the rear chamber of the high-pressure chamber through the fan-shaped holes of the intermediate baffle; the first and second labyrinth baffles form a tortuous flow channel in the rear chamber of the high-pressure chamber.

2. The silencer box of a multi-stage compression magnetic levitation centrifugal air compressor according to claim 1, characterized in that: The apertures of the first, second, third, and fourth orifice plates are less than 3 mm.

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