A universal noise reduction coupler for modular nitrogen generators

Abstract

The utility model discloses a modularization noise reduction coupler of nitrogen generator, including butt joint plate and bottom shell, butt joint plate is the flat of strip shape, and the middle part of butt joint plate is equipped with one row of adsorption cylinder interface, and one adsorption cylinder can be sealedly connected on every adsorption cylinder interface, and the bottom of butt joint plate is connected with the bottom shell of U shape, and the inside of bottom shell is air cavity, and air cavity is opposite to one row of adsorption cylinder interface, and the both ends of air cavity are air interface, and the compressed air is injected from air interface, and the compressed air can enter adsorption cylinder upward through adsorption cylinder interface, the inner wall of air cavity is the structure of wave, and the wall thickness of air cavity is the change of wave, and the maximum place of wall thickness is 5.8mm, and the minimum place of wall thickness is 4.2mm, set up the wave shape curved surface in the inside of this coupler, can divide the concentrated impact flow into multistrand laminar flow, makes turbulent kinetic energy greatly attenuate, reduces the noise and vibration.

Description

Technical Field

[0001] This utility model belongs to the technical field of nitrogen generators, specifically relating to a noise reduction connector for modular nitrogen generators. Background Technology

[0002] The modular nitrogen generator mainly consists of adsorption cylinders equipped with carbon molecular sieves and a control system. Multiple adsorption cylinders are installed on a connector, and compressed air enters each adsorption cylinder from the connector for pressurized adsorption to produce nitrogen. In actual use, the existing modular nitrogen generator generates a peak noise of 85-95 dB during instantaneous operation. After analyzing the source of the noise, it was confirmed that the main source of the noise is the turbulent vibration generated by the compressed air in the cavity of the connector. The root cause is that the wall thickness of the connector is insufficient, and the inner cavity is too smooth and empty, resulting in a resonance effect between aerodynamic noise and mechanical vibration. In order to reduce the noise in the nitrogen production process, the existing connector needs to be redesigned. Utility Model Content

[0003] To address the aforementioned problems and technical requirements, this utility model provides a universal noise reduction connector for modular oxygen generators. The connector features a wave-shaped curved surface inside, which can decompose concentrated impact flow into multiple laminar flows, significantly attenuating turbulent kinetic energy and reducing noise and vibration.

[0004] The technical solution of this utility model is as follows: A universal noise reduction connector for modular nitrogen generators includes a docking plate and a bottom shell. The docking plate is a long, flat plate with a row of adsorption cylinder interfaces in the middle. Each adsorption cylinder interface can be sealed to an adsorption cylinder. The bottom of the docking plate is connected to a U-shaped bottom shell, inside which is an air cavity. The air cavity is opposite to the row of adsorption cylinder interfaces, and both ends of the air cavity are air inlets. Compressed air is injected through the air inlets and can enter the adsorption cylinders upwards through the adsorption cylinder interfaces. The inner wall of the air cavity has a corrugated structure, and the wall thickness of the air cavity varies with the waveform, with a maximum wall thickness of 5.8 mm and a minimum wall thickness of 4.2 mm. In the above solution, the wall thickness of the air cavity varies. When compressed air rushes into the cavity from one end air inlet, the airflow at the edge contacts the corrugated inner wall. The inner wall forms resistance to the airflow, the airflow at the edge is dispersed, its flow direction changes, and the flow velocity slows down. Therefore, turbulence is difficult to form in the cavity, which can significantly reduce noise.

[0005] Furthermore, the air cavity is rectangular, comprising a bottom surface and side walls, with arc-shaped thickened protrusions at the joints between the bottom surface and the two side walls. These thickened protrusions reinforce the joints, increasing the overall rigidity of the connector and preventing deformation of the bottom shell during operation.

[0006] Furthermore, multiple buffer strips are evenly spaced along the length of the air cavity. These buffer strips have a U-shaped protrusion structure and cover the bottom surface and two side walls along the width direction. All buffer strips are parallel to each other. The multiple layers of buffer strips laid flat inside the cavity form a wave-shaped curved surface, which can decompose the concentrated impact airflow into multiple laminar flows, thereby increasing the turbulent kinetic energy attenuation rate and reducing air noise and mechanical vibration generated by turbulence, resulting in a significant noise reduction effect.

[0007] Furthermore, the cross-section of the buffer strip is semi-circular, and there is an intersection between the buffer strip and the thickened protrusion.

[0008] Furthermore, the spacing between adjacent buffer bars is smaller than the diameter of the buffer bars.

[0009] Furthermore, the docking plate and the bottom shell are integrally formed parts, and the manufacturing material of the docking plate and the bottom shell is aerospace aluminum.

[0010] The beneficial effects of this utility model are as follows: This utility model redesigns the original nitrogen adsorption cylinder connector, setting the inner wall of the air cavity inside the connector as a wave-shaped structure. The crest of the wave-shaped structure is the top of the semi-circular buffer strip, and the trough is the original inner wall of the connector. The "wave" formed by the multi-layered and spaced buffer strips can continuously block the concentrated and high-speed compressed air entering the cavity from one side, gradually slowing down and dispersing the impactful airflow to form multiple laminar flows, reducing the kinetic energy of the turbulence, and reducing the noise generated by the high-speed air, thereby achieving the effect of reducing noise and vibration. Furthermore, the wave-shaped inner wall is not a standard wave shape, but is formed by multiple semi-circular buffer strips. The semi-circular buffer strips are not only easy to manufacture, but also have a good speed reduction effect, resulting in better economy. Attached Figure Description

[0011] Figure 1 This is a three-dimensional structural diagram of a universal noise reduction connector for a modular nitrogen generator according to this utility model;

[0012] Figure 2 This is a structural diagram of the end face of this utility model;

[0013] Figure 3 for Figure 2 Cross-sectional view of section AA;

[0014] Figure 4 This is a bottom structural diagram of the present invention;

[0015] Figure 5 for Figure 4 Cross-sectional view of section BB;

[0016] The markings in the diagram are: docking plate 1, adsorption tube interface 11, bottom shell 2, air cavity 3, air interface 4, bottom surface 5, side wall 6, thickened protrusion 7, and buffer strip 8. Detailed Implementation

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0018] like Figure 1-5 The diagram shows a noise-reducing connector for a modular nitrogen generator of this invention, comprising a docking plate 1 and a bottom shell 2. The docking plate 1 is a long, flat plate with a row of adsorption cylinder interfaces 11 in the middle. Each adsorption cylinder interface 11 can be sealed to an adsorption cylinder (not shown in the figure). The bottom of the docking plate 1 is connected to a U-shaped bottom shell 2, and the bottom shell 2 contains an air cavity 3. The air cavity 3 is opposite to the row of adsorption cylinder interfaces 11, and the two ends of the air cavity 3 are air interfaces 4. Compressed air is injected through the air interfaces 4 and can enter the adsorption cylinder upwards through the adsorption cylinder interfaces 11. The inner wall of the air cavity 3 has a corrugated structure, and the wall thickness of the air cavity 3 varies with the waveform, with a maximum wall thickness of 5.8 mm and a minimum wall thickness of 4.2 mm.

[0019] The docking plate 1 and the bottom shell 2 are integrally molded parts, and the material used to manufacture the docking plate 1 and the bottom shell 2 is aerospace-grade aluminum. The air cavity 3 is rectangular and includes a bottom surface 5 and side walls 6. Arc-shaped thickened protrusions 7 are provided at the joints between the bottom surface 5 and the two side walls 6. The thickened protrusions 7 reinforce the joints, making the overall rigidity of the connector stronger and preventing deformation of the bottom shell during operation.

[0020] Multiple buffer strips 8 are evenly spaced along the length of the air cavity 3. The buffer strips 8 have a U-shaped protrusion structure and cover the bottom surface 5 and the two side walls 6 along the width direction. The different buffer strips 8 are all parallel to each other. The multiple layers of buffer strips 8 laid flat in the cavity form a wave-shaped curved surface, which can decompose the concentrated impact airflow into multiple laminar flows, improve the turbulent kinetic energy attenuation rate, reduce air noise and mechanical vibration generated by turbulence, and achieve a significant noise reduction effect.

[0021] The buffer strip 8 has a semi-circular cross-section, and there is an intersection between the buffer strip 8 and the thickened protrusion 7. The distance between adjacent buffer strips 8 is less than the diameter of the buffer strip 8.

[0022] The working principle of this utility model is as follows: Compressed air rushes into the cavity from one end air interface. The inner wall of the air cavity 3 inside the bottom shell 2 is set with a wave-shaped structure. The crest of the wave-shaped structure is the top of the semi-circular buffer baffle 8, and the trough is the original inner wall of the connector. The "wave" formed by the multi-layered buffer baffle can continuously block the concentrated and high-speed compressed air entering the cavity from one side, gradually slowing down and dispersing the impactful airflow to form multiple laminar flows, reducing the kinetic energy of the turbulence, and reducing the noise generated by the high-speed air, thus achieving the effect of reducing noise and vibration.

[0023] The above descriptions are merely several preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any variations and substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the scope of protection of this utility model. Therefore, the scope of protection of this utility model should be determined by the scope of the claims.

Claims

1. A universal noise reduction connector for modular nitrogen generators, characterized in that: The device includes a docking plate and a bottom shell. The docking plate is a long, flat plate with a row of adsorption cylinder interfaces in the middle. Each adsorption cylinder interface can be sealed to an adsorption cylinder. The bottom of the docking plate is connected to a U-shaped bottom shell, which contains an air cavity. The air cavity is opposite to the row of adsorption cylinder interfaces, and both ends of the air cavity are air inlets. Compressed air is injected through the air inlets and can enter the adsorption cylinders upward through the adsorption cylinder interfaces. The inner wall of the air cavity has a corrugated structure, and the wall thickness of the air cavity varies with the waveform, with a maximum wall thickness of 5.8 mm and a minimum wall thickness of 4.2 mm.

2. The universal noise reduction connector for a modular nitrogen generator according to claim 1, characterized in that: The air cavity is rectangular and includes a bottom surface and side walls. The connection between the bottom surface and the two side walls is provided with an arc-shaped thickened protrusion.

3. The universal noise reduction connector for a modular nitrogen generator according to claim 2, characterized in that: Multiple buffer strips are evenly spaced along the length of the air cavity. The buffer strips are U-shaped protrusions and cover the bottom surface and two side walls along the width direction. All buffer strips are parallel to each other.

4. A universal noise reduction connector for a modular nitrogen generator according to claim 3, characterized in that: The cross-section of the buffer strip is semi-circular, and there is an intersection between the buffer strip and the thickened protrusion.

5. A universal noise reduction connector for a modular nitrogen generator according to claim 4, characterized in that: The spacing between adjacent buffer bars is smaller than the diameter of the buffer bars.

6. A universal noise reduction connector for a modular nitrogen generator according to claim 5, characterized in that: The docking plate and the bottom shell are integrally formed parts, and the material used to manufacture the docking plate and the bottom shell is aerospace aluminum.

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