Air compressor with noise reduction function

Abstract

The present application discloses an air compressor with a noise reduction function, which relates to the field of air compressors and includes a machine base. The machine base is provided with a compressor power system and an air intake filter, and the air intake filter is communicated with the compressor power system through a pipeline. The machine base is provided with a sound insulation cover that covers the compressor power system, and the pipeline connecting the compressor power system and the air intake filter passes through the sound insulation cover. The air intake of the air intake filter is provided with a connecting pipe that is communicated with the inner cavity of the sound insulation cover, and the sound insulation cover is provided with an air inlet. In the present application, 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 continuously flow, thereby reducing the influence of the sound insulation cover on the heat dissipation efficiency of the compressor power system.

Description

Technical Field

[0001] This application relates to the field of air compressors, and more particularly to an air compressor with a noise reduction function. Background Art

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

[0003] The main components of a screw compressor include a compressor power system, an air intake filter, an oil and gas barrel, an oil cooler, an air cooler, an oil filter, etc. Air enters the compressor power system through the air filter, and the high-temperature and high-pressure oil and gas mixture is output 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 mainly two 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 passes through the oil filter for filtration and then returns to the compressor power system for continuous operation. 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, it will generate relatively large noise, which affects the working environment. The main noises of the air compressor are the mechanical noise of the compressor power system and the air flow noise of the air intake filter. Especially for screw air compressors, during their operation, due to the periodic suction and exhaust of the tooth space volume, the compressor noise is high. Although setting a sound insulation structure for the power components of the air compressor can reduce noise, it will affect the cooling effect of the air compressor, thereby affecting the reliability of the operation of the air compressor. Summary of the Invention

[0005] In order to minimize the impact of the sound insulation structure on the cooling effect of the compressor power system while sound insulation and noise reduction are carried out on the compressor power system, this application provides an air compressor with a noise reduction function.

[0006] The air compressor with a noise reduction function provided by this application adopts the following technical solution:

[0007] An air compressor with a noise reduction function includes a machine base, the machine base is provided with a compressor power system and an air intake filter, and the air intake filter is communicated with the compressor power system through a pipeline; the machine base is provided with a sound insulation cover, the sound insulation cover covers the compressor power system, and the pipeline connecting the compressor power system and the air intake filter passes through the sound insulation cover; the air intake of the air intake filter is provided with a connecting pipe, the connecting pipe is communicated with the inner cavity of the sound insulation cover, and the sound insulation cover is provided with an air inlet.

[0008] By adopting the above technical solution, when the air compressor operates, air enters the sound insulation cover from the air inlet of the sound insulation cover, then enters the 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 sound insulation cover and is not easily diffused into the air. Moreover, the air inside the sound insulation cover flows towards the connecting pipe and the intake filter, enabling some of the noise generated by the compressor power system to enter the connecting pipe and the intake filter along the direction of air flow, which is conducive to further reducing the diffusion of noise during the operation of the compressor power system. Also, the noise during the intake of air at the air inlet of the intake filter is blocked by the sound insulation of the connecting pipe and is not easily diffused into the air. On the other hand, the air inside the sound insulation cover can continuously 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.

[0009] Optionally, the inner diameter of the connecting pipe is larger than the diameter of the air inlet of the intake filter.

[0010] By adopting the above technical solution, the inner diameter of the connecting pipe is larger than the diameter of the air inlet of the intake filter, which is beneficial to reducing the impact of the connecting pipe on the intake efficiency of the intake filter.

[0011] Optionally, the sound insulation 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 sound insulation cover.

[0012] By adopting the above technical solution, the inlet baffle blocks the path for the mechanical noise of the compressor power system to spread outside the air inlet, thereby reducing the diffusion of the mechanical noise of the compressor power system.

[0013] Optionally, an inner sandwich cover is provided inside the sound insulation cover. A sandwich gap is formed between the inner sandwich cover and the sound insulation cover. The inner sandwich cover has a top wall and four side walls. The side wall of the inner sandwich cover close to the air inlet serves as the inlet baffle, and the remaining side walls of the inner sandwich cover are arranged as a louver structure. The louver structure has long strip-shaped blades, and the included angle between the outer side surface of the blade and the air flow direction in the sandwich gap is an acute angle.

[0014] 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.

[0015] 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.

[0016] 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.

[0017] Optionally, the folded angles of the blades on the left wall and the right wall gradually decrease in a direction approaching the connecting pipe.

[0018] 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.

[0019] 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.

[0020] 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.

[0021] 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.

[0022] By adopting the above technical solution, the two arc-shaped plates can reflect the noise generated by the compressor power system. The noise emitted by the arc-shaped plates is concentrated on the mounting surface of the compressor power system on the machine base. The part of the machine base for mounting the compressor power system has high strength and good sound insulation effect.

[0023] Optionally, an air supply fan is installed at the air inlet of the sound insulation cover.

[0024] By adopting the above technical solution, the air supply fan can accelerate the entry of external air into 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.

[0025] Optionally, the sound insulation cover includes two half covers. The interface between the two half covers is perpendicular to the mounting surface of the compressor power system. The two half covers are respectively detachably connected to the machine base.

[0026] By adopting the above technical solution, the sound insulation cover is detachably installed on the machine base, enabling the sound insulation cover to be removed from above the compressor power system, facilitating the inspection and maintenance of the compressor power system. The sound insulation cover is formed by combining two half covers, making it easy to disassemble and assemble.

[0027] In summary, the present application includes at least one of the following beneficial technical effects:

[0028] During the operation of the compressor power system, the mechanical noise generated is separated by the sound insulation cover. The air inside the sound insulation cover can continuously flow, which is beneficial to improving the heat dissipation efficiency of the compressor power system, thereby reducing the influence of the sound insulation cover on the heat dissipation efficiency of the compressor power system.

[0029] The inner sandwich cover and the sound insulation cover form a double-layer sound insulation structure, which is beneficial to further reducing the noise of the compressor power system. The inner sandwich cover is arranged in a louver structure, enabling the air inside and outside the inner sandwich cover to circulate, allowing the heat generated by the compressor power system to enter the sandwich gap.

[0030] The long-slit-shaped through holes can weaken the strength at the joints of the blades of the louver structure, making the blades prone 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. Description of the Drawings

[0031] Figure 1 is the overall structural schematic diagram of Embodiment 1.

[0032] Figure 2 is the schematic diagram of the state with the sound insulation cover removed in Embodiment 1.

[0033] Figure 3 is the cross-sectional view of the sound insulation cover in Embodiment 1.

[0034] Figure 4 It is a schematic structural view of the sound insulation cover in Embodiment 2.

[0035] Figure 5 It is a schematic structural view of the inner sandwich cover in Embodiment 2.

[0036] Figure 6 It is a schematic structural view of the inner sandwich cover in Embodiment 2 from another perspective.

[0037] Figure 7 It is a partial view for showing the structure of the blade in Embodiment 2.

[0038] Figure 8 It is a schematic view for showing the blade angles of the left side wall and the right side wall of the inner sandwich cover in Embodiment 3.

[0039] Description of the reference numerals:

[0040] 1, machine base; 2, compressor power system; 3, intake air filter; 4, sound insulation cover; 41, half cover; 42, air inlet; 43, avoidance hole; 431, semi-circular notch; 44, inlet baffle; 45, inner sandwich cover; 451, top wall; 4511, arc-shaped plate; 452, front side wall; 453, rear side wall; 454, left side wall; 455, right side wall; 46, connecting column; 47, sandwich gap; 48, blade; 481, through hole; 5, connecting pipe; 6, air supply fan. Detailed implementation manners

[0041] The following further elaborates on this application Figure 1-8 with reference to the accompanying drawings. Embodiment 1

[0042] The embodiment of this application discloses an air compressor with a noise reduction function. Referring to Figure 1 and Figure 2 , the air compressor with a noise reduction function includes a machine base 1, the machine base 1 is a combined structure of profiles and sheet metals, the machine base 1 is fixedly installed with a compressor power system 2 and an intake air filter 3, the air outlet of the intake air filter 3 is communicated with the air inlet of the compressor power system 2 through a pipeline, the machine base 1 is provided with a sound insulation cover 4, the sound insulation cover 4 covers the compressor power system 2, and the pipeline connecting the compressor power system 2 and the intake air filter 3 passes through the sound insulation cover 4; the air inlet of the intake air 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 inlet of the intake air filter 3, the connecting pipe 5 is communicated with the inner cavity of the sound insulation cover 4, and the sound insulation cover 4 is provided with an air inlet 42, and the air inlet 42 is located on the side of the sound insulation cover 4 away from the connecting pipe 5.

[0043] When the air compressor is running, air enters the sound insulation cover 4 through the air inlet 42 of the sound insulation cover 4, then enters the intake filter 3 through the connecting pipe 5, and then enters the compressor power system 2. During the operation of the air compressor, the sound insulation cover 4 can reduce the diffusion of the mechanical noise of the compressor power system 2.

[0044] It should be particularly noted that in this embodiment, other components of the air compressor except the compressor power system 2, such as the intake filter 3, oil-gas barrel, oil-gas separator, oil cooler, air cooler, oil filter, etc., are arranged on the outside of the sound insulation cover 4 as much as possible to minimize the heating components inside the sound insulation cover 4. The air compressor as a whole is an open structure, so that other components of the air compressor except the compressor power system 2 can dissipate heat easily.

[0045] Refer to Figure 1 and Figure 3 , the sound insulation cover 4 includes two half covers 41. The width dimensions of the two half covers 41 are adjusted according to the position of the compressor power system 2 and the pipeline layout. The interface between the two half covers 41 is a vertical plane, and the installation surface of the compressor power system 2 is a horizontal plane. The two half covers 41 are respectively detachably connected to the machine base 1 through threaded fasteners.

[0046] Refer to Figure 1 , several avoidance holes 43 of different specifications are provided at the top of the sound insulation cover 4. The avoidance holes 43 are used to avoid the pipelines connecting the compressor power system 2. Each avoidance hole 43 is composed of two semi-circular notches 431, and the two semi-circular notches 431 are respectively located on different half covers 41.

[0047] Refer to Figure 3 , the sound insulation cover 4 is provided with an inlet baffle 44. The inlet baffle 44 is fixedly installed inside the sound insulation cover 4 through several connecting columns 46. The position of the inlet baffle 44 is opposite to the air inlet 42. The contour dimension of the inlet baffle 44 is larger than the contour dimension of the air inlet 42. A gap for air circulation is left between the inlet baffle 44 and the inner wall of the sound insulation cover 4. The inlet baffle 44 blocks the path for the mechanical noise of the compressor power system 2 to spread outside the air inlet 42.

[0048] The purpose of the inlet baffle 44 is to block the path for the noise of the compressor power system 2 to spread outward. Therefore, in another embodiment, the inlet baffle 44 can be arranged on the outside of the sound insulation cover 4.

[0049] Refer to Figure 1 , a make-up air fan 6 is installed at the air inlet 42 of the sound insulation cover 4. The make-up air fan 6 is located outside the sound insulation cover 4, and the make-up air fan 6 is provided with an insect-proof net. The make-up air fan 6 can increase the efficiency of air entering the sound insulation cover 4 and the connecting pipe 5 to reduce the influence of the connecting pipe 5 on the intake efficiency of the intake filter 3.

[0050] The implementation principle of the air compressor with noise reduction function in the embodiments of this application is as follows: During the operation of the compressor power system 2, the mechanical noise generated is separated by the sound insulation cover 4 and is not easily diffused into the air. Moreover, the air inside the sound insulation cover 4 flows towards the connecting pipe 5 and the air intake filter 3, enabling some of the noise generated by the compressor power system 2 to enter the connecting pipe 5 and the air intake filter 3 along the direction of air flow, which is conducive to further reducing the diffusion of noise during the operation of the compressor power system 2. Also, the noise during the air intake at the air intake of the air intake filter 3 is insulated by the connecting pipe 5 and is not easily diffused into the air. On the other hand, the air inside the sound insulation cover 4 can continuously maintain flow, which is beneficial to improving the heat dissipation efficiency of the compressor power system 2, thereby reducing the impact of the sound insulation cover 4 on the heat dissipation efficiency of the compressor power system 2. Embodiment 2

[0051] Refer to Figure 4 In this embodiment, the difference from Embodiment 1 is that an inner sandwich cover 45 is provided inside the sound insulation cover 4. The inner sandwich cover 45 is set as a horizontal split structure adapted to the structure of the sound insulation cover 4. A sandwich gap 47 is formed between the inner sandwich cover 45 and the sound insulation cover 4, and the inner sandwich cover 45 and the sound insulation cover 4 are connected and fixed by connecting columns 46. The inner sandwich cover 45 and the sound insulation cover 4 form a double-layer sound insulation structure to further reduce the mechanical noise of the compressor power system 2.

[0052] In addition, a sandwich gap 47 is formed between the inner sandwich cover 45 and the sound insulation cover 4, enabling the air outside the sound insulation cover 4 to flow towards the connecting pipe 5 through the sandwich gap 47. When the mechanical noise generated by the compressor power system 2 enters the sandwich gap 47, the air flow inside the sandwich gap 47 can interfere with the propagation of the noise.

[0053] Refer to Figure 5 and Figure 6 In this embodiment, the inner sandwich cover 45 has a top wall 451 and four side walls. The four side walls of the inner sandwich 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 inner sandwich cover 45 penetrates 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 orientation of the air intake of the connecting pipe 5, and the front side wall 452 serves as an 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 sound insulation cover 4.

[0054] Refer to Figure 6The 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.

[0055] 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 .

[0056] 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.

[0057] 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.

[0058] 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

[0059] 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.

[0060] 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 machine base (1), wherein the machine base (1) is provided with a compressor power system (2) and an air inlet filter (3), and the air inlet filter (3) is communicated with the compressor power system (2) through 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 shutter structure, 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; The 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); 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); 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).

2. The air compressor with noise reduction function according to claim 1, wherein: 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: The mounting surface of the compressor power system (2) is a horizontal surface, and the top wall (451) of the sandwich inner cover (45) includes two arc-shaped plates (4511). The center lines of curvature 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 respect to the compressor power system (2).

4. 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).

5. The air compressor with noise reduction function according to claim 1, wherein: 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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