Air inlet silencing system for dry screw air compressor

Abstract

The utility model provides an air inlet noise reduction system for a dry screw air compressor, which comprises an air inlet noise reduction channel provided with an air inlet and an air outlet, and the air outlet of the air inlet noise reduction channel is communicated with a main engine air inlet of the dry screw air compressor; and the multiple silencing baffles are arranged in the air inlet silencing channel, and the silencing baffles are arranged at intervals in the airflow flowing direction. According to the design of the air inlet noise reduction channel and the noise reduction baffle, the flowing path of air flow can be prolonged by forcibly changing the flowing direction of the air flow for multiple times, and noise flowing through the air flow can be adsorbed and shielded through the sound absorption cotton arranged at different positions. According to the dry screw air compressor, leakage of high-frequency noise transmitted from the air inlet of the main machine in the air inlet process of the dry screw air compressor is effectively reduced, the problem that in the prior art, no effective treatment means is provided for the high-frequency noise transmitted from the air inlet of the main machine is solved, and the overall noise level of the dry screw air compressor is remarkably reduced.

Description

Technical Field

[0001] The utility model relates to the field of air compressors, in particular to an air intake silencer system for a dry screw air compressor. Background Art

[0002] Dry screw air compressors have been increasingly used in the industrial sector in recent years. Compared to traditional oil-injected screw compressors, dry screw compressors have advantages such as no need for lubricating oil, cleaner compressed air, and lower maintenance costs.

[0003] A dry screw air compressor primarily consists of an air conditioner, motor, intake system, exhaust system, cooling system, lubrication system, and electronic control system. The air conditioner is the core component of the compressor. Compared to oil-free screw compressors, dry screw air compressors: a. No lubricating oil is involved in the compression, cooling, and sealing of the air in the compression chamber; b. The female and male rotors do not contact each other; the female rotor is driven by a synchronous gear on the male rotor side, and a certain gap is usually set between the male and female rotors. To reduce leakage between the rotors and improve the air conditioner's compression efficiency, the rotational speed is usually increased, using a speed-increasing gear to increase the original speed from 1,500 to 3,000 rpm to 10,000 to 20,000 rpm.

[0004] However, due to the unique operating characteristics of dry screw air compressors, they generate considerable noise during operation. Especially at high speeds, the high-speed meshing of the speed-increasing and synchronous gears produces high-frequency mechanical noise. Furthermore, as compressed air exits the main unit's exhaust port, friction between the airflow and the inner walls of the pipe creates a certain amount of airflow noise. These combined noises, propagating through the main unit's inlet and exhaust ports, become one of the main noise sources for dry screw compressors.

[0005] Existing dry screw air compressors typically incorporate mufflers at the exhaust port to reduce exhaust noise, but lack effective solutions for the high-frequency noise emanating from the main unit's air intake. Some models on the market still utilize intake systems similar to those used in oil-injected screw compressors, consisting solely of simple filtration devices without specific designs specifically tailored to the high-frequency noise characteristics of dry screw air compressors. This results in significant noise issues at the main unit's air intake, hindering overall noise control for dry screw air compressors. Utility Model Content

[0006] The technical problem to be solved by the utility model is to overcome the defects of the prior art and provide an air intake silencer system for a dry screw air compressor which can eliminate high-frequency noise.

[0007] The utility model solves the above technical problems through the following technical solutions:

[0008] An air intake silencer system for a dry screw air compressor comprises an air intake silencer channel with an air inlet and an air outlet, the air outlet of the air intake silencer channel communicating with the main air intake of the dry screw air compressor; and a plurality of silencer baffles disposed within the air intake silencer channel, the silencer baffles being spaced apart along the airflow direction. The design of the air intake silencer channel and the silencer baffles can reduce the transmission of high-frequency mechanical and airflow noise from the main air compressor through the main air intake to the outside.

[0009] Preferably, the muffler baffles are alternately arranged on opposite side walls of the intake muffler channel. This design can extend the effective distance of the noise flowing through the muffler channel by forcibly changing the direction of noise transmission multiple times, thereby improving the attenuation effect of the intake muffler channel on the noise flowing through.

[0010] Preferably, the inner wall of the air intake silencer channel is provided with sound-absorbing cotton, and the silencer baffle is also provided with sound-absorbing cotton. The provision of the sound-absorbing cotton can further improve the absorption and shielding effect of noise.

[0011] Preferably, the present invention further comprises: an air filter mounting box, on which an air inlet and an air outlet are provided, the air inlet of the air filter mounting box being connected to the air outlet of the air inlet muffler channel; an air filter rear box, on which an air inlet and an air outlet are provided, the air inlet of the air filter rear box being connected to the air outlet of the air filter mounting box; an air filter element disposed within the air filter mounting box; and an air intake hose, one end of which is connected to the air outlet of the air filter rear box and the other end of which is connected to the air inlet of the main unit of the dry screw air compressor. This design further reduces noise while ensuring air intake and air cleanliness.

[0012] Preferably, the air filter installation box includes a box body and a detachable door panel arranged on the box body, and the door panel is provided with sound-absorbing material. Such a design facilitates the replacement and maintenance of the air filter element and further reduces noise.

[0013] Preferably, the muffler baffle is in a bent shape, which can achieve multiple direction changes in the air intake channel, further improving the noise shielding effect.

[0014] Preferably, a mounting hole for fixing is provided on the top plate of the air intake silencer channel, so as to facilitate installation of the air intake silencer system on the dry screw air compressor.

[0015] Preferably, a pre-filter is provided at the air inlet of the air intake silencer channel to filter out larger particles of impurities, protect the subsequent air filter element, and extend its service life.

[0016] Preferably, the air inlet silencer channel is arranged at the top of the dry screw air compressor, which saves space and facilitates installation and maintenance.

[0017] Preferably, the air inlet of the air inlet silencing channel is located outside the dry screw air compressor, which can make the air inlet temperature of the dry screw air compressor close to the actual ambient temperature, which is beneficial to reducing the exhaust temperature of the main engine.

[0018] Preferably, the utility model also includes an air filter pressure difference indicator, which is arranged on the air intake hose and can monitor the pressure difference of the air filter element in real time, reminding the user to replace the air filter element in time to ensure the normal operation of the compressor.

[0019] To sum up, the utility model effectively reduces the high-frequency noise transmitted from the main engine air inlet during the intake process of the dry screw air compressor by setting up an air intake silencer channel, a silencer baffle, a sound-absorbing material and other measures, solves the problem of lack of effective treatment means for the high-frequency noise transmitted from the main engine air inlet in the prior art, and significantly reduces the overall noise level of the dry screw air compressor. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a structural schematic diagram of an air intake silencer system for a dry screw air compressor according to an embodiment of the present invention.

[0021] Figure 2 This is a schematic structural diagram of an air intake passage according to an embodiment of the present invention.

[0022] Figure 3 This is a structural schematic diagram of an air filter installation box and an air filter rear box according to an embodiment of the present invention. DETAILED DESCRIPTION

[0023] A preferred embodiment is given below, and the present invention is described more clearly and completely in conjunction with the accompanying drawings.

[0024] Figure 1 This is a structural diagram of an intake silencer system for a dry screw air compressor according to an embodiment of the present invention. Figure 2 This is a schematic structural diagram of an air intake passage according to an embodiment of the present invention. Figure 3 This is a structural diagram of the air filter installation box and the air filter rear box according to an embodiment of the present invention. Figure 1-3 As shown, the utility model provides an air intake silencer system for a dry screw air compressor, which includes a pre-filter 2, an air intake silencer channel 1, an air filter installation box 8, an air filter rear box 3, an air intake hose 7 and an air intake valve 5, which are connected in sequence to form an air intake channel.

[0025] The air inlet 104 and the air outlet 101 are provided on the air inlet silencer channel 1. The air outlet 101 of the air inlet silencing channel 1 is indirectly connected to the main air inlet of the dry screw air compressor. The main air inlet is not shown in the figure, but those skilled in the art can understand its position and connection method based on the existing technology.

[0026] Multiple muffler baffles 103 are installed within the air intake muffler channel 1, spaced apart along the airflow direction. This design reduces the transmission of airflow noise from the main unit's air intake. Specifically, once air enters the air intake muffler channel 1, it is redirected multiple times by the muffler baffles 103, thereby extending the airflow path. Furthermore, the transmitted noise is absorbed and shielded by the sound-absorbing cotton placed at different locations, effectively reducing noise.

[0027] Preferably, sound-absorbing cotton 102 is provided on the inner wall of the air inlet muffler channel 1 and on the muffler baffle 103. The sound-absorbing cotton 102 can absorb and shield the noise transmitted from the main unit air inlet, especially has a good absorption and shielding effect on high-frequency noise, thereby further reducing the overall noise level.

[0028] The present invention further comprises an air filter mounting box 8, an air filter rear box 3, an air filter element, and an air intake hose duct 301. The air filter mounting box 8 is provided with an air inlet 805 and an air outlet, the air inlet 805 of the air filter mounting box 8 communicating with the air outlet 101 of the air intake muffler duct 1; the air filter rear box 3 is provided with an air inlet 302 and an air outlet, the air inlet 302 of the air filter rear box 3 communicating with the air outlet of the air filter mounting box 8; the air filter element is disposed within the air filter mounting box 8; one end of the air intake hose 7 on the air intake hose duct 301 is connected to the air outlet of the air filter rear box 3, and the other end is connected to the main air inlet of the dry screw air compressor.

[0029] The air filter mounting box 8 and the air filter rear box 3 form a closed structure. Airflow is filtered before entering the main unit, ensuring air cleanliness and extending the service life of the compressor's internal components. This sealed box structure further enhances noise absorption and shielding, providing a quieter operating environment. The specially designed, thick-walled intake hose 301 provides a certain degree of noise isolation, further reducing noise transmission.

[0030] Further, the air filter installation box 8 includes a box body and a detachable door panel 803 arranged on the box body, and a hand screw bolt 802 is provided on the door panel 803. Such a design is convenient for replacing and maintaining the air filter element and further reduces noise.

[0031] Furthermore, the muffler baffle 103 has a special shape, such as a bend at a certain angle. The bend-shaped muffler baffle can achieve multiple changes in the direction of the noise transmission path in the intake muffler channel, thereby improving the noise reduction effect.

[0032] Furthermore, a mounting hole for fixing is provided on the top plate of the air inlet muffler channel 1. The air inlet muffler channel 1 can be fixed to the dry screw air compressor through the mounting hole, which is convenient for installation and maintenance.

[0033] Furthermore, a pre-filter 2 is provided at the air inlet 104 of the air intake silencer channel 1. The pre-filter 2 can filter out larger particulate impurities in the air to avoid clogging the subsequent air filter element, thereby extending the service life of the air filter element and reducing the maintenance cost of the equipment.

[0034] Furthermore, the air intake silencer channel 1 is arranged at the top of the dry screw air compressor. The air intake silencer channel 1 is arranged at the top to save space and facilitate installation and maintenance of the air intake silencer system.

[0035] Furthermore, the utility model also includes an air filter pressure difference indicator 4, which is arranged on the air intake hose 7 and can monitor the pressure difference of the air filter element 10 in real time. When the pressure difference is too large, it reminds the user to replace the air filter element in time to ensure the normal operation of the compressor and avoid affecting the performance and service life of the compressor due to filter element blockage.

[0036] Furthermore, a temperature sensor 9 is mounted on the air filter mounting box 8 to monitor the temperature of the air entering the compressor in real time. If the temperature sensor 9 detects that the intake air temperature is too high or too low, it will issue an alarm, prompting the user to take appropriate measures, such as adjusting the intake air temperature or checking the intake system for malfunctions, thereby ensuring the normal operation of the compressor.

[0037] The clamp 6 is used to securely connect the air intake hose 7 to the air outlet of the air filter rear housing 3, and the air intake hose 7 to the air inlet of the air intake valve 5. The clamp 6 ensures the firmness and sealing of the connection, prevents air leakage, and ensures that the compressor can inhale and work normally.

[0038] The pre-filter card slot 105 is provided at the air inlet 104 of the air inlet muffler channel 1 for installing and fixing the pre-filter 2. The pre-filter card slot 105 can facilitate the installation and removal of the pre-filter 2, and is convenient for cleaning or replacing the pre-filter 2.

[0039] The hand screw 802 is used to fix the air filter installation box door panel 803. Compared with other fixing methods, the hand screw 802 can complete the disassembly and assembly of the door panel without the help of tools, making it convenient for users to regularly open the door panel to check, clean or replace the air filter element 10, thereby improving maintenance efficiency.

[0040] The temperature sensor mounting hole 801 is provided on the air filter mounting box 8 for mounting the temperature sensor 9. The size and position of the temperature sensor mounting hole 801 are carefully designed to fix the temperature sensor 9 in the best measurement position to ensure the accuracy of the temperature measurement.

[0041] Air filter element 10 is located within air filter mounting housing 8 and mounted on air filter mounting bracket 804. It filters fine particles and impurities from the air entering the compressor main unit, further improving the cleanliness of the compressed air. The filtration accuracy of air filter element 10 can be selected based on actual needs to meet the compressed air quality requirements of different application scenarios.

[0042] To sum up, the air intake silencer system for the dry screw air compressor provided by the utility model can effectively reduce the noise generated by the dry screw air compressor during the air intake process, especially the high-frequency noise, by arranging the air intake silencer channel, silencer baffle, sound-absorbing material, air filter installation box, air filter rear box, pre-filter, air filter pressure difference transmitter and other components, thereby significantly reducing the overall noise level of the dry screw air compressor and providing users with a quieter use environment.

[0043] The above embodiments are only used to illustrate the technical solution of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the present invention can still be modified or some technical features can be replaced by equivalents without departing from the spirit of the technical solution of the present invention. They should all be included in the scope of the technical solution for which protection is requested in the present invention.

Claims

1. An air intake silencer system for a dry screw air compressor, characterized in that: include: An air inlet silencer channel (1) is provided with a first air inlet (104) and an air outlet (101), wherein the air outlet (101) of the air inlet silencer channel (1) is connected to the main air inlet of the dry screw air compressor; A plurality of silencer baffles (103) are arranged inside the air intake silencer channel (1), and the silencer baffles (103) are arranged at intervals along the air flow direction. The muffler baffles (103) are alternately arranged on opposite side walls inside the air intake muffler channel (1). The inner wall of the air intake silencer channel (1) is provided with sound-absorbing cotton (102), and the silencer baffle (103) is also provided with sound-absorbing cotton. An air filter installation box (8) is provided with a second air inlet (805) and an air outlet, wherein the second air inlet (805) of the air filter installation box (8) is in communication with the air outlet (101) of the air inlet silencing channel (1); An air filter rear box (3) is provided with a third air inlet (302) and an air outlet, wherein the third air inlet (302) of the air filter rear box (3) is in communication with the air outlet of the air filter installation box (8); An air filter element (10) is arranged in the air filter installation box (8); An air intake hose (7) has one end connected to the air outlet of the air filter rear box (3) and the other end connected to the main air inlet of the dry screw air compressor.

2. The air intake silencer system for a dry screw air compressor according to claim 1, characterized in that: The air filter installation box (8) comprises a box body and a detachable door panel (803) arranged on the box body, and the door panel (803) is provided with sound absorbing material.

3. The air intake silencer system for a dry screw air compressor according to claim 2, characterized in that: The sound-absorbing baffle (103) is in a bent shape.

4. The air intake silencer system for a dry screw air compressor according to claim 3, characterized in that: A mounting hole for fixing is provided on the top plate of the air intake silencer channel (1).

5. The air intake silencer system for a dry screw air compressor according to claim 4, characterized in that: A pre-filter (2) is provided at the first air inlet (104) of the air inlet silencing channel (1).

6. The dry screw air compressor intake silencer system according to claim 5, characterized in that: The air intake silencer channel (1) is arranged on the top of the dry screw air compressor.

7. The air intake silencer system for a dry screw air compressor according to claim 6, characterized in that: It also includes an air filter pressure difference transmitter (4), which is arranged on the air intake hose (7).

Images