Air compressor with noise reduction function

Abstract

The invention discloses an air compressor with a noise reduction function, and relates to the field of air compressors, the air compressor comprises a machine base, the machine base is provided with a compressor power system and an air inlet filter, and the air inlet filter communicates with the compressor power system through a pipeline; the machine base is provided with a sound insulation cover, the compressor power system is covered with the sound insulation cover, and a pipeline connecting the compressor power system and the air inlet filter penetrates through the sound insulation cover. An air inlet of the air inlet filter is provided with a communicating pipe, the communicating pipe is communicated with an inner cavity of the sound insulation cover, and the sound insulation cover is provided with an air inlet. Mechanical noise generated in the operation process of the compressor power system is separated by the sound insulation cover, and air on the inner side of the sound insulation cover can continuously keep flowing, so that the influence of the sound insulation cover on the heat dissipation efficiency of the compressor power system is reduced.

Description

Technical Field

[0001] The present application relates to the field of air compressors, and in particular to an air compressor with a noise reduction function. Background Art

[0002] An air compressor is a device used to compress gas. The structure of an air compressor is similar to that of a water pump. Most air compressors are reciprocating piston type, rotary vane type or screw type. Among them, screw compressors have the advantages of fewer wearing parts, high reliability, and smooth and safe operation.

[0003] The main components of a screw compressor include the compressor power system, air intake filter, oil and gas barrel, oil cooler, air cooler, oil filter, etc. The air enters the compressor power system through the air filter, and the output is a high-temperature and high-pressure oil and gas mixture after being compressed by the compressor power system. The oil and gas mixture will flow into the oil and gas barrel for separation; after separation, there are two main paths, the first loop is the oil pipeline, and the other is the air pipeline. The high-temperature oil in the oil pipeline flows to the oil cooler, and after cooling, it is filtered through the oil filter and returned to the compressor power system to continue operating. The air in the air pipeline is cooled by the air cooler and then input into the air storage tank for storage.

[0004] During the operation of the air compressor, a lot of noise will be generated, which will affect the working environment. The main noises of the air compressor are the mechanical noise of the compressor power system and the airflow noise of the air intake filter. Especially for screw air compressors, during the operation, the volume between the teeth is periodically sucked and exhausted, so the compressor noise is high. Although the noise can be reduced by setting a sound insulation structure for the power components of the air compressor, it will affect the cooling effect of the air compressor, thereby affecting the reliability of the air compressor operation. Summary of the invention

[0005] In order to minimize the influence of the sound insulation structure on the cooling effect of the compressor power system under the premise of sound insulation and noise reduction of the compressor power system, the present application provides an air compressor with noise reduction function.

[0006] The air compressor with noise reduction function provided in this application adopts the following technical solution: An air compressor with a noise reduction function comprises a machine base, the machine base is provided with a compressor power system and an air intake filter, the air intake filter is connected to the compressor power system through a pipeline; the machine base is provided with a soundproof cover, the soundproof cover covers the compressor power system, and the pipeline connecting the compressor power system and the air intake filter passes through the soundproof cover; the air inlet of the air intake filter is provided with a connecting pipe, the connecting pipe is connected to the inner cavity of the soundproof cover, and the soundproof cover is provided with an air inlet.

[0007] By adopting the above technical solution, when the air compressor is running, the air enters the soundproof cover from the air inlet of the soundproof cover, then enters the air intake filter through the connecting pipe, and then enters the compressor power system. The mechanical noise generated during the operation of the compressor power system is separated by the soundproof cover and is not easy to diffuse into the air, and the air inside the soundproof cover flows toward the connecting pipe and the air intake filter, so that part of the noise generated by the compressor power system can follow the flow direction of the air and enter the connecting pipe and the air intake filter, which is conducive to further reducing the diffusion of noise during the operation of the compressor power system; and, the noise of the air intake port of the air intake filter when inhaling air is affected by the sound insulation effect of the connecting pipe and is not easy to diffuse into the air. On the other hand, the air inside the soundproof cover can continue to flow, which is conducive to improving the heat dissipation efficiency of the compressor power system, thereby reducing the impact of the soundproof cover on the heat dissipation efficiency of the compressor power system.

[0008] Optionally, the inner diameter of the connecting pipe is larger than the diameter of the air inlet of the air intake filter.

[0009] By adopting the above technical solution, the inner diameter of the connecting pipe is larger than the diameter of the air inlet of the air intake filter, which is beneficial to reducing the influence of the connecting pipe on the air intake efficiency of the air intake filter.

[0010] Optionally, the soundproof cover is provided with an inlet baffle, the position of the inlet baffle is opposite to the air inlet, and a gap for air circulation is left between the inlet baffle and the inner wall of the soundproof cover.

[0011] By adopting the above technical solution, the inlet baffle blocks the path of the mechanical noise of the compressor power system propagating to the outside of the air inlet, thereby reducing the diffusion of the mechanical noise of the compressor power system.

[0012] Optionally, a sandwich inner cover is provided on the inner side of the sound insulation cover, and a sandwich gap is formed between the sandwich inner cover and the sound insulation cover; the sandwich inner cover has a top wall and four side walls, the side wall of the sandwich inner cover close to the air inlet serves as an inlet baffle, and the remaining side walls of the sandwich inner cover are arranged as a louver structure, the louver structure has long strip-shaped blades, and the outer side surface of the blade forms an acute angle with the airflow direction in the sandwich gap.

[0013] By adopting the above technical solution, the interlayer inner cover and the soundproof cover form a double-layer soundproof structure, which is conducive to further reducing the noise of the compressor power system. An interlayer gap is formed between the interlayer inner cover and the soundproof cover, so that the air outside the soundproof cover flows to the connecting pipe through the interlayer gap. The air flow speed in the interlayer gap is greater than the air flow speed around the compressor power system. When the noise generated by the compressor power system enters the interlayer gap, the air flow direction in the interlayer gap is perpendicular to or crosses the propagation direction of the noise, thereby interfering with the propagation of the noise. The interlayer inner cover is set as a louver structure, so that the air inside and outside the interlayer inner cover can circulate, so that the heat generated by the compressor power system can enter the interlayer gap.

[0014] Optionally, two side walls of the interlayer inner cover are respectively a left side wall and a right side wall, the left side wall and the right side wall are parallel to the direction of the air inlet of the connecting pipe, and the inner side surfaces of the blades of the left side wall and the right side wall are inclined toward the air inlet of the connecting pipe.

[0015] By adopting the above technical solution, the blades can reflect the noise generated by the compressor power system. The inner side surfaces of the blades on the left and right walls are inclined toward the air inlet of the connecting pipe, so that the noise reflected by the blades on the left and right walls is transmitted to the air inlet of the connecting pipe.

[0016] Optionally, the folded angles of the blades on the left wall and the right wall gradually decrease in a direction approaching the connecting pipe.

[0017] By adopting the above technical solution, the fold angle of the blades of the shutter structure gradually decreases and changes, which can adapt to the relative position between the blades and the air inlet of the connecting pipe, so that the noise reflected by the blades can enter the connecting pipe as much as possible.

[0018] Optionally, a plurality of long slit-shaped through holes are provided at the connection portion between the blade and the interlayer inner cover, and the length direction of the through holes is arranged along the length direction of the blade, and the through holes are arranged at intervals along the length direction of the blade.

[0019] By adopting the above technical solution, the long slit-shaped through holes can weaken the strength of the connection between the blades of the shutter structure, making it easy for the blades to vibrate under the action of noise. When the blades vibrate, they can consume the energy of the noise, thereby playing a noise reduction role.

[0020] Optionally, the mounting surface of the compressor power system is a horizontal plane, and the top wall of the interlayer inner cover includes two arc-shaped plates, the center lines of curvature of the two arc-shaped plates are located on the mounting surface of the compressor power system on the base, and are staggered with the compressor power system.

[0021] By adopting the above technical solution, the two arc plates can reflect the noise generated by the compressor power system. The noise emitted by the arc plates is concentrated on the mounting surface of the compressor power system on the base. The part of the base used to mount the compressor power system has high strength and good sound insulation effect.

[0022] Optionally, an air supply fan is installed at the air inlet of the sound insulation cover.

[0023] By adopting the above technical solution, the air supply fan can accelerate the outside air to enter the sound insulation cover and the connecting pipe, reducing the influence of the connecting pipe on the air intake efficiency of the air intake filter.

[0024] Optionally, the sound insulation cover includes two half covers, the interface between the two half covers is perpendicular to the installation surface of the compressor power system, and the two half covers are detachably connected to the base respectively.

[0025] By adopting the above technical solution, the soundproof cover can be detachably mounted on the base, so that the soundproof cover can be removed from above the compressor power system to facilitate the inspection and maintenance of the compressor power system. The soundproof cover is formed by combining two half covers, so that the soundproof cover is easy to disassemble and assemble.

[0026] In summary, the present application includes at least one of the following beneficial technical effects: The mechanical noise generated during the operation of the compressor power system is separated by the sound insulation cover, and the air inside the sound insulation cover can continue to flow, which is beneficial to improving the heat dissipation efficiency of the compressor power system, thereby reducing the impact of the sound insulation cover on the heat dissipation efficiency of the compressor power system.

[0027] The interlayer inner cover and the soundproof cover form a double-layer soundproof structure, which is beneficial to further reduce the noise of the compressor power system. The interlayer inner cover is set as a shutter structure, so that the air inside and outside the interlayer inner cover can circulate, so that the heat generated by the compressor power system can enter the interlayer gap.

[0028] The long slit-shaped through holes can weaken the strength of the connection between the blades of the shutter structure, making it easier for the blades to vibrate under the action of noise. When the blades vibrate, they can consume the energy of the noise, thereby playing a noise reduction role. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the overall structure of Example 1.

[0030] Figure 2 It is a schematic diagram of the state in which the sound insulation cover is removed in Example 1.

[0031] Figure 3 This is a cross-sectional view of the soundproof cover in Example 1.

[0032] Figure 4It is a schematic structural diagram of the sound insulation cover of Example 2.

[0033] Figure 5 It is a schematic structural diagram of the sandwich inner cover of Example 2.

[0034] Figure 6 This is a schematic structural diagram of the sandwich inner cover of Example 2 from another viewing angle.

[0035] Figure 7 This is a partial view of the structure of the blade according to Embodiment 2.

[0036] Figure 8 It is a schematic diagram of the blade angles of the left and right walls of the sandwich in Example 3.

[0037] Description of reference numerals: 1. Machine base; 2. Compressor power system; 3. Air intake filter; 4. Soundproof cover; 41. Half cover; 42. Air inlet; 43. Avoidance hole; 431. Semicircular notch; 44. Inlet baffle; 45. Interlayer inner cover; 451. Top wall; 4511. Arc plate; 452. Front side wall; 453. Rear side wall; 454. Left side wall; 455. Right side wall; 46. Connecting column; 47. Interlayer gap; 48. Blade; 481. Through hole; 5. Connecting pipe; 6. Air supply fan. DETAILED DESCRIPTION

[0038] The following is combined with Figure 1-8 This application is described in further detail. Example 1

[0039] The present application embodiment discloses an air compressor with noise reduction function. Figure 1 and Figure 2 The air compressor with noise reduction function includes a base 1, which is a combination structure of a profile and a sheet metal. A compressor power system 2 and an air intake filter 3 are fixedly installed on the base 1. The air outlet of the air intake filter 3 is connected to the air intake of the compressor power system 2 through a pipeline. The base 1 is provided with a soundproof cover 4, which covers the compressor power system 2, and the pipeline connecting the compressor power system 2 and the air intake filter 3 passes through the soundproof cover 4; the air intake of the air intake filter 3 is provided with a connecting pipe 5, the inner diameter of the connecting pipe 5 is larger than the diameter of the air intake of the air intake filter 3, the connecting pipe 5 is connected with the inner cavity of the soundproof cover 4, and the soundproof cover 4 is provided with an air inlet 42, and the air inlet 42 is located on the side of the soundproof cover 4 away from the connecting pipe 5.

[0040] When the air compressor is running, air enters the soundproof cover 4 from the air inlet 42 of the soundproof cover 4, then enters the air intake filter 3 through the connecting pipe 5, and then enters the compressor power system 2. During the operation of the air compressor, the soundproof cover 4 can reduce the diffusion of the mechanical noise of the compressor power system 2.

[0041] It should be noted that, in this embodiment, other components of the air compressor except the compressor power system 2, such as the air intake filter 3, the oil-gas barrel, the oil-gas separator, the oil cooler, the air cooler, the oil filter, etc., are arranged on the outside of the soundproof cover 4 as much as possible to reduce the heat generating components inside the soundproof cover 4 as much as possible. The air compressor is an open structure as a whole, so that other components of the air compressor except the compressor power system 2 can easily dissipate heat.

[0042] Reference Figure 1 and Figure 3 The soundproof cover 4 includes two half covers 41, the width of the two half covers 41 is adjusted according to the position of the compressor power system 2 and the pipeline layout, the dividing interface between the two half covers 41 is a vertical plane, the mounting surface of the compressor power system 2 is a horizontal plane, and the two half covers 41 are detachably connected to the base 1 through threaded fasteners.

[0043] Reference Figure 1 The top of the soundproof cover 4 is provided with a plurality of avoidance holes 43 of different sizes, and the avoidance holes 43 are used to avoid the pipeline connected to the compressor power system 2. Each avoidance hole 43 is composed of two semicircular notches 431, and the two semicircular notches 431 are respectively located on different half covers 41.

[0044] Reference Figure 3 The soundproof cover 4 is provided with an inlet baffle 44, which is fixedly mounted on the inner side of the soundproof cover 4 through a plurality of connecting columns 46. The position of the inlet baffle 44 is opposite to the air inlet 42, and the outline size of the inlet baffle 44 is larger than the outline size of the air inlet 42. A gap for air circulation is left between the inlet baffle 44 and the inner wall of the soundproof cover 4. The inlet baffle 44 blocks the path of the mechanical noise of the compressor power system 2 to propagate outside the air inlet 42.

[0045] The purpose of the inlet baffle 44 is to block the path for the noise of the compressor power system 2 to diffuse outward, so in another embodiment, the inlet baffle 44 can be arranged on the outside of the sound insulation cover 4.

[0046] Reference Figure 1 An air supply fan 6 is installed at the air inlet 42 of the soundproof cover 4. The air supply fan 6 is located outside the soundproof cover 4 and is provided with an insect-proof net. The air supply fan 6 can increase the efficiency of air entering the soundproof cover 4 and the connecting pipe 5, so as to reduce the influence of the connecting pipe 5 on the air intake efficiency of the air intake filter 3.

[0047] The implementation principle of the air compressor with noise reduction function in the embodiment of the present application is as follows: the mechanical noise generated during the operation of the compressor power system 2 is separated by the soundproof cover 4 and is not easily diffused into the air, and the air inside the soundproof cover 4 flows toward the connecting pipe 5 and the air intake filter 3, so that part of the noise generated by the compressor power system 2 can follow the flow direction of the air and enter the connecting pipe 5 and the air intake filter 3, which is conducive to further reducing the diffusion of noise during the operation of the compressor power system 2; and the noise of the air intake port of the air intake filter 3 during air inhalation is affected by the sound insulation effect of the connecting pipe 5 and is not easily diffused into the air. On the other hand, the air inside the soundproof cover 4 can continue to flow, which is conducive to improving the heat dissipation efficiency of the compressor power system 2, thereby reducing the influence of the soundproof cover 4 on the heat dissipation efficiency of the compressor power system 2. Example 2

[0048] Reference Figure 4 The difference between this embodiment and the embodiment 1 is that a sandwich inner cover 45 is provided on the inner side of the soundproof cover 4, and the sandwich inner cover 45 is set as a horizontal split structure adapted to the structure of the soundproof cover 4, and a sandwich gap 47 is formed between the sandwich inner cover 45 and the soundproof cover 4, and the sandwich inner cover 45 and the soundproof cover 4 are connected and fixed by a connecting column 46. The sandwich inner cover 45 and the soundproof cover 4 form a double-layer sound insulation structure to further reduce the mechanical noise of the compressor power system 2.

[0049] In addition, an interlayer gap 47 is formed between the interlayer inner cover 45 and the sound insulation cover 4, so that the air outside the sound insulation cover 4 flows to the connecting pipe 5 through the interlayer gap 47. When the mechanical noise generated by the compressor power system 2 enters the interlayer gap 47, the airflow in the interlayer gap 47 can interfere with the propagation of the noise.

[0050] Reference Figure 5 and Figure 6 The sandwich inner cover 45 has a top wall 451 and four side walls, and the four side walls of the sandwich inner cover 45 are respectively a front side wall 452, a rear side wall 453, a left side wall 454 and a right side wall 455. The split interface of the sandwich inner cover 45 runs through the left side wall 454, the right side wall 455 and the top wall 451. The left side wall 454 and the right side wall 455 are parallel to the direction of the air inlet of the connecting pipe 5, wherein the front side wall 452 serves as the inlet baffle 44. The left side wall 454, the right side wall 455 and the top wall 451 are all split structures to adapt to the split structure of the soundproof cover 4.

[0051] Reference Figure 6 The remaining left side wall 454, right side wall 455 and rear side wall 453 of the interlayer inner cover 45 are all set as a shutter structure, and the shutter structure has long strip blades 48, and the angle between the outer side surface of the blade 48 and the airflow direction in the interlayer gap 47 is an acute angle. In this embodiment, the outer side surface of the blade 48 of the shutter structure refers to its surface facing away from the compressor power system 2.

[0052] The interlayer inner cover 45 is configured as a shutter structure, so that air inside and outside the interlayer inner cover 45 can circulate, thereby allowing the heat generated by the compressor power system 2 to enter the interlayer gap 47 .

[0053] Reference Figure 7 A plurality of long slit-shaped through holes 481 are provided at the connection portion between the blade 48 and the interlayer inner cover 45. The length direction of the through holes 481 is arranged along the length direction of the blade 48, and the through holes 481 are arranged at intervals along the length direction of the blade 48. The long slit-shaped through holes 481 can weaken the strength of the connection portion of the blade 48, making it easy for the blade 48 to vibrate under the action of noise, thereby playing a noise reduction role.

[0054] Reference Figure 6 The inner side surfaces of the blades 48 of the left side wall 454 and the right side wall 455 are inclined toward the air inlet of the connecting pipe 5. The blades 48 can reflect the mechanical noise generated by the compressor power system 2, and the noise reflected by the blades 48 of the left side wall 454 and the right side wall 455 is transmitted toward the air inlet of the connecting pipe 5.

[0055] Reference Figure 5 The top wall 451 of the sandwich inner cover 45 includes two arc-shaped plates 4511, and the curvature center lines of the two arc-shaped plates 4511 are located on the mounting surface of the compressor power system 2 on the base 1, and are staggered with the compressor power system 2. The noise emitted by the arc-shaped plates 4511 is concentrated on the mounting surface of the compressor power system 2 on the base 1, and the part of the base 1 for mounting the compressor power system 2 has a high strength and a good sound insulation effect. Example 3

[0056] Reference Figure 8 The difference between this embodiment and embodiment 2 is that the angle of the blade 48 of the left wall 454 and the right wall 455 gradually decreases in the direction approaching the connecting pipe 5, which can adapt to the relative position between the blade 48 and the air inlet of the connecting pipe 5, so that the noise reflected by the blade 48 can enter the connecting pipe 5 as much as possible.

[0057] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An air compressor with a noise reduction function, comprising a base (1), wherein the base (1) is provided with a compressor power system (2) and an air intake filter (3), wherein the air intake filter (3) is connected to the compressor power system (2) via a pipeline; characterized in that: The machine base (1) is provided with a soundproof cover (4), the soundproof cover (4) covers the compressor power system (2), and a pipeline connecting the compressor power system (2) and the air intake filter (3) passes through the soundproof cover (4); the air intake port of the air intake filter (3) is provided with a connecting pipe (5), the connecting pipe (5) is in communication with the inner cavity of the soundproof cover (4), and the soundproof cover (4) is provided with an air inlet (42); The soundproof cover (4) is provided with an inlet baffle (44), the position of the inlet baffle (44) is opposite to the air inlet (42), and a gap for air circulation is left between the inlet baffle (44) and the inner wall of the soundproof cover (4); An inner sandwich cover (45) is provided on the inner side of the soundproof cover (4), and an interlayer gap (47) is formed between the inner sandwich cover (45) and the soundproof cover (4); the inner sandwich cover (45) has a top wall (451) and four side walls, the side wall of the inner sandwich cover (45) close to the air inlet (42) serves as an inlet baffle (44), and the remaining side walls of the inner sandwich cover (45) are arranged as a louver structure, the louver structure has long strip blades (48), and the angle between the outer side surface of the blade (48) and the airflow direction in the interlayer gap (47) is an acute angle.

2. The air compressor with noise reduction function according to claim 1, characterized in that: The inner diameter of the connecting pipe (5) is greater than the diameter of the air inlet of the air intake filter (3).

3. The air compressor with noise reduction function according to claim 1, characterized in that: Two side walls of the sandwich inner cover (45) are respectively a left side wall (454) and a right side wall (455); the left side wall (454) and the right side wall (455) are parallel to the direction of the air inlet of the connecting pipe (5); and the inner side surfaces of the blades (48) of the left side wall (454) and the right side wall (455) are inclined toward the air inlet of the connecting pipe (5).

4. The air compressor with noise reduction function according to claim 3, characterized in that: The folded angles of the blades (48) of the left side wall (454) and the right side wall (455) gradually decrease in a direction approaching the connecting pipe (5).

5. The air compressor with noise reduction function according to claim 1, characterized in that: A plurality of long slit-shaped through holes (481) are provided at the connection portion between the blade (48) and the sandwich inner cover (45); the length direction of the through holes (481) is arranged along the length direction of the blade (48); and the through holes (481) are arranged at intervals along the length direction of the blade (48).

6. The air compressor with noise reduction function according to claim 1, characterized in that: The mounting surface of the compressor power system (2) is horizontal, and the top wall (451) of the sandwich inner cover (45) includes two arc-shaped plates (4511), and the curvature center lines of the two arc-shaped plates (4511) are located on the mounting surface of the compressor power system (2) on the base (1), and are staggered with the compressor power system (2).

7. The air compressor with noise reduction function according to claim 1, characterized in that: An air supply fan (6) is installed at the air inlet (42) of the soundproof cover (4).

8. The air compressor with noise reduction function according to claim 1, characterized in that: The soundproof cover (4) comprises two half covers (41), the interface between the two half covers (41) is perpendicular to the installation surface of the compressor power system (2), and the two half covers (41) are respectively detachably connected to the base (1).

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