Noise reduction and shock absorption device of oilless air compressor

Abstract

The noise reduction and shock absorption device comprises a machine body, an immersion structure is arranged on the surface of the machine body, a shock absorption and noise reduction assembly is arranged on the surface of the immersion structure, one end of the shock absorption and noise reduction assembly is connected with a heat exchanger, the immersion structure comprises a protective shell, the protective shell is cylindrical, and a mounting cavity is formed in the protective shell; the shock absorption and noise reduction assembly comprises a box body, a liquid cavity is formed in the box body, the protective shell is located in the liquid cavity, shock absorption springs and a pasting pad are installed on the inner wall of the box body in an array mode, the lower half portion of the air compressor body is immersed in liquid, double efficient dissipation of sound waves and vibration energy is achieved, in the aspect of shock absorption, the liquid serves as a high-density viscous medium, and the damping effect is good. A strong damping effect is formed on vibration of a machine body, and vibration energy is quickly converted into heat energy through internal friction when trying to push liquid molecules to move, so that solid sound transmitted through a foundation is greatly weakened, the problem of overall shaking of equipment is effectively solved, and noise reduction is achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of air compressors, in particular to a noise reduction and shock absorption device for an oil-free air compressor. BACKGROUND

[0002] An air compressor is a device used to generate compressed air. Oil-free means that no lubricating oil is used in the compression chamber, avoiding contamination of compressed air by oil. This makes it particularly suitable for industries such as food, medicine, and electronics that require high-purity compressed air. Oil-free air compressors usually use self-lubricating pistons made of special materials (such as Teflon coating) or use structures such as scroll and screw. However, due to the lack of oil lubrication and damping, the noise and vibration generated by mechanical operation (such as piston knocking and motor rotation) are often more obvious than those of oil-filled air compressors. However, the oil-free air compressor in the working room still produces unpleasant sounds due to the mixing of air dynamic noise (intake and exhaust sound) and mechanical noise (part friction and impact sound). The unbalanced force of internal moving parts (such as pistons, crankshafts, and motors) is transmitted to the casing and foundation, causing the entire device and the surrounding environment to shake, resulting in vibration and noise problems.

[0003] In the prior art, a noise reduction and shock absorption device is disclosed in publication "CN114837916B", especially a noise reduction and shock absorption device for an oil-free air compressor. The purpose of the present application is to provide a noise reduction and shock absorption device for an oil-free air compressor with a fixed position function. The present application provides such a noise reduction and shock absorption device for an oil-free air compressor, which comprises a support plate, a first support block, a first support column, a second support block, a noise reduction plate, etc. The first support block is provided on the top right side of the support plate. The first support column is symmetrically provided on the upper left and right sides of the first support block. The second support block is rotatably provided between the top of the first support column. The noise reduction plate is provided on the top of the second support block to reduce noise. When the oil-free air compressor emits noise and vibration, the first movable plate and the noise reduction plate cooperate to reduce noise. At the same time, under the action of the first movable block, the first spring, and the second support block, the oil-free air compressor can be damped, facilitating the use of people.

[0004] However, the prior art still has the following problems: Traditional shock absorption and noise reduction devices rely on basic vibration isolation materials such as rubber pads for shock absorption. The damping effect on high-frequency vibration in oil-free air compressors is limited, making it difficult to suppress solid sound transmission through the base, resulting in obvious shaking of the equipment. In terms of noise reduction, a soundproof cover is usually used to passively isolate air sound, but it cannot effectively dissipate structural radiation noise, especially low-frequency components. Moreover, the closed structure easily leads to poor heat dissipation of the equipment, and the lack of temperature control system causes the soundproof material to age and fail due to high temperature. The overall noise reduction is not complete, and the heat dissipation and shock absorption performance are difficult to balance. SUMMARY

[0005] The oil-free air compressor noise reduction and shock absorption device aims to solve the problems in the background art.

[0006] To achieve the above object, the oil-free air compressor noise reduction and shock absorption device comprises a body, the surface of the body is provided with an immersion structure, the surface of the immersion structure is provided with a shock absorption and noise reduction assembly, and one end of the shock absorption and noise reduction assembly is connected with a heat exchanger. The immersion structure comprises a protective shell, the protective shell is in a cylindrical shape, and an installation cavity is formed in the interior of the protective shell. The shock absorption and noise reduction assembly comprises a box body, a liquid cavity is formed in the interior of the box body, and the protective shell is located in the interior of the liquid cavity, and damping springs and pads are respectively arrayed and installed on the inner wall of the box body. Preferably, the body comprises a compression cylinder, an air tank and a port, and the air tank is located in the interior of the protective shell and cooperates with the protective shell.

[0007] Preferably, the compression cylinder and the port are located at the opening position of the top surface of the protective shell, and the compression cylinder and the port are exposed to the outside.

[0008] Preferably, a separation opening is formed in the front surface of the protective shell, a sealing cover is cooperatively installed at the position of the separation opening, and the sealing cover is bolted to the front surface of the protective shell.

[0009] Preferably, lifting pieces are respectively fixed on the two sides of the box body, the movable end of each lifting piece is connected with a lifting branch, and the connecting end of the lifting branch is screwed to the surface of the protective shell.

[0010] Preferably, the pads are connected with one end of the springs, the springs are fixed to the inner wall of the box body, and the springs are circumferentially arrayed on the surface of the protective shell.

[0011] Preferably, one side of each pad is provided with a pad surface and a pressing surface, the pad surface is attached to the surface of the protective shell, and the pressing surface is an inclined surface.

[0012] Preferably, the top surface of the heat exchanger and the front surface of the box body are respectively provided with liquid inlet ends and liquid outlet ends, two adjacent liquid inlet ends are connected with each other, and two adjacent liquid outlet ends are connected with each other.

[0013] Preferably, a fixing support is sleeved on the surface of the heat exchanger, the connecting end of the fixing support is attached to the front surface of the box body, and the fixing support is bolted to the attachment surface of the box body.

[0014] Preferably, the liquid cavity is in a rectangular shape, the liquid cavity is used for storing liquid required for shock absorption and noise reduction, and the protective shell is wrapped around the body and can be immersed in the liquid in the liquid cavity.

[0015] Compared with the prior art, the application has the beneficial effects that: 1. By immersing the lower half of the air compressor body in liquid, double efficient dissipation of sound waves and vibration energy is achieved. In terms of shock absorption, the liquid acts as a high-density viscous medium, forming a strong damping effect on the vibration of the body. The vibration energy is rapidly converted into heat energy through internal friction when trying to push the liquid molecules to move, thereby greatly weakening the solid sound transmission through the foundation and effectively solving the problem of overall equipment shaking. In terms of noise reduction, the liquid layer forms a sound impedance mismatch interface, so that the structural noise radiated by the body surface, especially the medium and low frequency components, is largely reflected and absorbed at the air-liquid interface, significantly reducing the radiated noise generated by components such as the machine shell and gas storage tank.

[0016] 2. The integrated liquid cavity circulation heat exchange and mechanical buffer assembly provides comprehensive protection for long-term stable operation. Through the coordinated work of the external heat exchanger and the liquid level and temperature sensor, the liquid that has absorbed a large amount of vibration heat energy and machine operation heat is continuously cooled, maintaining the constant working temperature of the liquid, avoiding the attenuation of noise reduction and shock absorption performance and the risk of equipment overheating due to liquid warming. At the same time, the arrayed shock absorbing springs arranged on the inner wall of the box and the self-adaptive pad form a multi-stage buffer structure. When the cylindrical protective shell is lowered, the inclined extrusion surface of the pad guides it to smoothly fit in place, and the spring group further absorbs and isolates residual vibration by being attached to the surface of the shell at multiple points, forming double protection of liquid damping and mechanical elastic buffer, and comprehensively improving the smoothness of equipment operation and service life. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a schematic diagram of the device of the application; Figure 2 It is a perspective view of the application; Figure 3 It is a side view of the application; Figure 4 It is a top view of the application; Figure 5 It is a schematic diagram of the box structure in the application; Figure 6 It is a diagram of the box interior in the application; Figure 7 It is a structure diagram of the protective shell in the application; Figure 8 It is a structure diagram of the sealing cover in the application.

[0018] In the figure: 1, body; 11, compression cylinder; 12, gas storage tank; 13, port; 2, immersion mechanism; 21, protective shell; 22, mounting cavity; 23, disengagement port; 24, sealing cover; 25, lifting member; 26, lifting arm; 3. Vibration damping and noise reduction components; 31. Housing; 32. Liquid chamber; 33. Vibration damping spring; 34. Pad; 35. Fitting surface; 36. Extrusion surface; 4. Heat exchanger; 41. Liquid inlet; 42. Liquid outlet; 43. Fixed bracket. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Please see Figures 1-8 The present invention provides a technical solution: Example 1: A noise reduction and vibration damping device for an oil-free air compressor: It includes a body 1, with an immersion mechanism 2 on the surface of the body 1. A vibration damping and noise reduction component 3 is provided on the surface of the immersion mechanism 2, and one end of the vibration damping and noise reduction component 3 is connected to a heat exchanger 4. The body 1 includes a compression cylinder 11, an air tank 12, and a port 13. The air tank 12 is located inside a protective shell 21, and the two cooperate with each other. The compression cylinder 11 and the port 13 are both located at the opening on the top surface of the protective shell 21, and both are exposed to the outside. The body 1 is an integral oil-free air compressor, and the main components include, but are not limited to, the compression cylinder 11, the air tank 12, and the port 13. Its core objective is... The entire air compression process avoids the involvement of lubricating oil, thus producing 100% oil-free clean compressed air. For piston-type oil-free air compressors, the core is the compression cylinder 11 assembly, which usually adopts a two-stage or higher compression design. The high-pressure air generated by the compression cylinder 11 enters the air receiver 12 through a metal pipeline. The air receiver 12 is a pressurized container, and its primary function is to stabilize the system pressure and reduce the load fluctuation of the compressor. The interfaces of the machine body 1 are concentrated in its port 13 part. The most important one is the air inlet port 13, which is connected to the air filter and is responsible for drawing in ambient air and filtering out dust and particulate matter to ensure that the air entering the compression system is clean.

[0021] The immersion mechanism 2 includes a protective shell 21, which is cylindrical. The protective shell 21 has an internal mounting cavity 22 and a release opening 23 on its front. During mechanical operation, the machine body 1 generates unpleasant noise and vibration, which can even cause shaking of the entire equipment and the surrounding environment. Therefore, adding a noise reduction and vibration damping structure to the air compressor improves the user experience and ensures better machine operation. The immersion mechanism 2, together with the vibration damping and noise reduction components 3, allows the machine body 1 to automatically descend and immerse itself in the liquid. Sound travels easily in the air... However, during the process of sound waves entering water from air and then returning to air, due to the significant difference in density and acoustic impedance between air and water, most sound waves are reflected back at the air-water interface and cannot penetrate effectively. Secondly, water is a viscous fluid; when the air compressor casing vibrates in water, it needs to push the surrounding water molecules. During this process, the vibrational energy is converted into heat energy through friction and dissipated, effectively suppressing the casing's vibration and thus reducing solid-borne sound transmission through the foundation. Specifically, in terms of vibration damping, the effect is the most direct and significant; the strong vibrations generated during mechanical operation are transmitted through the foundation... The metal structure of body 1 transmits vibrations outwards. When the lower half of body 1 is submerged in liquid, the liquid, as a high-density viscous medium, exerts a strong damping effect on the vibration of body 1. The vibrational energy, attempting to propel the liquid, is largely consumed through friction and converted into heat energy. This is analogous to how swinging your hand rapidly in air is easy, but performing the same action in water would result in significant resistance. This damping effect effectively suppresses the overall vibration amplitude of body 1, thereby reducing solid-borne sound transmission through the base to the ground and surrounding environment, thus resolving the issue of overall equipment swaying. Secondly... In terms of noise reduction, the immersion mechanism 2 mainly targets structural radiated noise. In addition to the airflow noise directly emitted from the air inlet and outlet of the compression cylinder 11, a large part of the noise source of the air compressor is the radiated noise generated by the vibration of large-area metal surfaces such as the casing, bracket, and air tank 12, which are excited like gongs. Immersing this part of the structure in the liquid greatly hinders the vibration of these surfaces, which is equivalent to covering the gongs and preventing them from effectively radiating sound waves into the air. Therefore, the noise generated by structural vibration, especially the mid- and low-frequency components, will be significantly reduced.

[0022] A sealing cover 24 is installed at the location of the detachment opening 23, and the sealing cover 24 is bolted to the front of the protective shell 21. To further explain, the protective shell 21 in the immersion mechanism 2 encloses components such as the air tank 12, preventing the air compressor from directly contacting the liquid and causing corrosion, rust, and other problems. It also effectively provides good waterproofing for the enclosed components, allowing them to be directly immersed in the liquid, while components such as the compression cylinder 11 are exposed above the liquid and do not come into contact with it. The mounting cavity 22 is the location where the air compressor is installed. After the part of the air tank 12 is installed in the mounting cavity 22, the sealing cover 24 is used to close the detachment opening 23 of the protective shell 21, and the sealing ring is used to seal it. This allows part of the machine body 1 to be lowered and immersed in the liquid. Similarly, when the machine body 1 is not in use or needs to be removed for maintenance, the bolts and other components on the sealing cover 24 can be removed, and the air tank 12 can be directly pulled out from the inside of the mounting cavity 22. Example 2: Based on Embodiment 1, lifting components 25 are fixed on both sides of the housing 31. The movable end of the lifting component 25 is connected to the lifting arm 26, and the connecting end of the lifting arm 26 is screwed to the surface of the protective shell 21. The lifting component 25 can be an electric lifting component 25 or a pneumatic / hydraulic cylinder. A suitable lifting component is selected according to the size of the machine body 1, and the lifting arm is used to connect the protective shell 21 to the lifting end of the lifting component 25. The lifting component 25 can move the protective shell 21 together with the machine body 1 under the connection of the lifting arm 26, so that it is immersed in or detached from the liquid.

[0023] The vibration damping and noise reduction assembly 3 includes a housing 31, with a liquid cavity 32 inside the housing 31. A protective outer shell 21 is located inside the liquid cavity 32. Vibration damping springs 33 and pads 34 are arrayed on the inner wall of the housing 31. One end of each pad is connected to a vibration damping spring 33, and all vibration damping springs 33 are fixed to the inner wall of the housing 31. The vibration damping springs 33 are arranged circumferentially on the surface of the protective outer shell 21. The liquid cavity 32 is rectangular and is used to store the required vibration damping and noise reduction liquid. The protective outer shell 21, encased in the body 1, can be simultaneously immersed in the liquid in the liquid cavity 32. One side of each pad 34 has a contact surface 35 and a pressing surface 36. The contact surface 35 is in contact with the surface of the protective outer shell 21, and the pressing surface 36 is an inclined surface. The housing 31 in the vibration damping and noise reduction assembly 3, including the liquid cavity 32, is mainly used to store the required liquid, ensuring that the liquid is absorbed when the body 1 descends into the housing 31. The rear part can be submerged in liquid to reduce noise and vibration. The inner wall of the housing 31 is equipped with multiple shock-absorbing springs 33, and one end of the housing also includes a pad 34. The pad 34 has a bonding surface 35 and a pressing surface 36. The bonding surface 35 is mainly bonded to the surface of the protective shell 21. Since the protective shell 21 is cylindrical, the pad 34 needs to be designed independently to ensure that multiple positions on the surface of the protective shell 21 can be bonded to the bonding surface 35 of the pad 34 after it descends to the specified position. This allows the shock-absorbing springs 33 to play an additional role in shock absorption when the body 1 vibrates. Similarly, since the protective shell 21 is cylindrical, it first contacts the uniquely designed inclined pressing surface 36 when it descends. As the protective shell 21 continues to descend, it can press the pad 34 to make it displaced, ensuring that the body 1 and the protective shell 21 can be properly submerged in the appropriate position.

[0024] The top surface of the heat exchanger 4 and the front surface of the housing 31 are respectively provided with an inlet end 41 and an outlet end 42. Two adjacent inlet ends 41 are connected to each other, and two adjacent outlet ends 42 are connected to each other. A fixed bracket 43 is fitted onto the surface of the heat exchanger 4, and the connecting end of the fixed bracket 43 is in contact with the front surface of the housing 31. The fixed bracket 43 is bolted to the contact surface 35 of the housing 31. The entire device is also equipped with a heat exchanger 4. While the liquid reduces vibration and noise on the machine body 1, it can also cool down the heat absorbed by the protective shell 21. Therefore, in order to ensure that the liquid can continuously cool the machine, a heat exchanger 4 is added. The inlet end 41 is connected to the inlet end 41 of the housing 31 through a pipeline. Similarly, the outlet ends 42 of the two are also connected. An additional liquid level monitoring and temperature sensor are added to achieve normal heat exchange and ensure the normal operation of the device. Working Principle: The compressor body is an integrated oil-free air compressor. Its main components include, but are not limited to, the compression cylinder, air tank, and ports. Its core objective is to avoid the involvement of lubricating oil throughout the entire air compression process, thereby producing 100% oil-free clean compressed air. For reciprocating oil-free air compressors, the core is the compression cylinder assembly, which typically employs a two-stage or higher compression design. The high-pressure air generated by the compression cylinder enters the air tank through metal pipes. The air tank is a pressurized container whose primary function is to stabilize system pressure and reduce compressor load fluctuations. The compressor's interfaces are concentrated in its port section, with the intake port being particularly important. It connects to an air filter, responsible for drawing in ambient air and filtering out dust and particulate matter, ensuring the quality of air entering the compression system. Cleanliness is essential because the mechanical operation of an air compressor generates unpleasant noise and vibration, which can even cause the entire equipment and the surrounding environment to shake. Therefore, adding noise reduction and vibration damping structures to air compressors improves the user experience and ensures better machine operation. The immersion structure, working in conjunction with vibration damping and noise reduction components, allows the compressor to automatically descend and immerse itself in the liquid. While sound travels easily in air, during the transition from air to water and back again, the significant difference in density (acoustic impedance) between air and water causes most sound waves to be reflected back at the air-water interface, failing to penetrate effectively. Furthermore, water is a viscous fluid; when the air compressor casing vibrates in water, it needs to move the surrounding water molecules, and this vibrational energy... The vibrations are dissipated as heat through friction, effectively suppressing the vibration of the outer shell and thus reducing solid-borne sound transmission through the base. Specifically, the effect is most direct and significant in vibration damping. Strong vibrations generated during mechanical operation are transmitted outwards through the metal structure of the machine. When the lower part of the machine is submerged in liquid, the liquid, as a high-density viscous medium, exerts a strong damping effect on the vibrations. The vibrational energy, attempting to propel the liquid, is largely consumed and converted into heat through friction. This is analogous to how swinging your hand quickly in air is easy, but performing the same action in water would result in significant resistance. This damping effect effectively suppresses the overall vibration amplitude of the machine, thereby reducing the sound transmitted to the ground through the base. The submerged structure addresses the issue of solid-borne sound transmission from the surface and surrounding environment, thus resolving the overall equipment swaying problem. Secondly, in terms of noise reduction, the submerged structure primarily targets structural radiated noise. Besides the airflow noise directly emanating from the compressor cylinder's inlet and outlet, a significant portion of the air compressor's noise comes from the radiated noise generated by the vibration of large metal surfaces such as the casing, supports, and air tank, which act like gongs being vibrated. Immersing these structural components in liquid significantly hinders their vibration, essentially covering the gongs and preventing them from effectively radiating sound waves into the air. Therefore, this noise generated by structural vibration, especially the mid-to-low frequency components, is significantly reduced. Furthermore, the protective outer shell in the submerged structure encloses components such as the air tank.To prevent the air compressor from directly contacting the liquid, which could lead to corrosion and rust, and to effectively waterproof the encased components, allowing them to be directly submerged in the liquid, while keeping components such as the compression cylinder exposed above the liquid without contact, the mounting cavity is the location where the air compressor is installed. After the air tank is installed in the mounting cavity, the opening of the protective shell is sealed with a sealing cap, and the included sealing ring is used to seal it. This allows part of the machine body to be lowered and submerged in the liquid. Similarly, when not in use or when the machine body needs to be removed for maintenance, the sealing cap can be closed. After disassembling bolts and other components, the gas tank 12 can be directly pulled out from the installation cavity. The lifting component can be an electric lifting component or a pneumatic / hydraulic cylinder. Select a suitable lifting component according to the size of the machine body, and use the lifting arm to connect the protective shell to the lifting end of the lifting component. The lifting component, under the connection of the lifting arm, can make the protective shell and the machine body move up and down together, immersing or detaching it from the liquid. The housing in the shock absorption and noise reduction component includes a liquid chamber, which is mainly used to store the required liquid, ensuring that after the machine body descends into the housing, part of it can be immersed in the liquid to reduce noise and vibration. The effect is achieved by incorporating multiple shock-absorbing springs into the inner wall of the enclosure, with a pad at one end. This pad has a contact surface and a compression surface. The contact surface primarily adheres to the surface of the protective outer shell. Because the protective shell is cylindrical, the pad needs to be independently designed to ensure proper contact. This ensures that multiple points on the surface of the protective shell can contact the contact surface of the pad after it descends to a designated position. This allows the shock-absorbing springs to provide additional shock absorption when the enclosure vibrates. Similarly, because the protective shell is cylindrical, it first contacts the uniquely designed inclined compression surface as it descends, and then... The continuous descent of the outer shell compresses and displaces the gasket, ensuring the machine body and protective shell are properly submerged. The entire device is also equipped with a heat exchanger. While the liquid dampens vibrations and reduces noise in the machine body, it also cools the heat absorbed by the protective shell. Therefore, to ensure continuous cooling of the machine, a heat exchanger is added. The inlet end is connected to the inlet end of the housing via a pipeline, and similarly, their outlet ends are connected. Additional liquid level monitoring and temperature sensors are also included to achieve proper heat exchange and ensure the normal operation of the device.

[0025] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A noise reduction and vibration damping device for an oil-free air compressor, characterized in that: Includes a body (1), the surface of the body (1) is provided with an immersion mechanism (2), the surface of the immersion mechanism (2) is provided with a shock absorption and noise reduction component (3), and one end of the shock absorption and noise reduction component (3) is connected to a heat exchanger (4). The immersion mechanism (2) includes a protective shell (21), which is cylindrical, and an installation cavity (22) is provided inside the protective shell (21). The shock absorption and noise reduction component (3) includes a housing (31), a liquid cavity (32) is provided inside the housing (31), and a protective shell (21) is located inside the liquid cavity (32). Shock-absorbing springs (33) and pads (34) are respectively arrayed on the inner wall of the housing (31).

2. The noise reduction and vibration damping device for an oil-free air compressor according to claim 1, characterized in that: The body (1) includes a compression cylinder (11), an air tank (12) and a port (13), and the air tank (12) is located inside the protective shell (21), and the two cooperate with each other.

3. The noise reduction and vibration damping device for an oil-free air compressor according to claim 2, characterized in that: The compression cylinder (11) and the port (13) are both located at the opening on the top surface of the protective shell (21), and the compression cylinder (11) and the port (13) are both exposed to the outside.

4. The noise reduction and vibration damping device for an oil-free air compressor according to claim 1, characterized in that: The protective shell (21) has a release opening (23) on the front side, and a sealing cover (24) is installed at the location of the release opening (23), and the sealing cover (24) is bolted to the front side of the protective shell (21).

5. The noise reduction and vibration damping device for an oil-free air compressor according to claim 4, characterized in that: Lifting components (25) are fixed on both sides of the housing (31). The movable end of the lifting component (25) is connected to a lifting arm (26), and the connecting end of the lifting arm (26) is connected to the surface screw of the protective shell (21).

6. The noise reduction and vibration damping device for an oil-free air compressor according to claim 1, characterized in that: The pad (34) is connected to one end of the shock-absorbing spring (33), and the shock-absorbing spring (33) is fixed to the inner wall of the housing (31). The shock-absorbing spring (33) is arranged in a circumferential array on the surface of the protective shell (21).

7. The noise reduction and vibration damping device for an oil-free air compressor according to claim 1, characterized in that: The pad (34) has an adhesive surface (35) and an extrusion surface (36) on one side, and the adhesive surface (35) is attached to the surface of the protective shell (21), and the extrusion surface (36) is an inclined surface.

8. The noise reduction and vibration damping device for an oil-free air compressor according to claim 1, characterized in that: The heat exchanger (4) has an inlet end (41) and an outlet end (42) on its top surface and the front of the housing (31), respectively. Two adjacent inlet ends (41) are connected to each other, and two adjacent outlet ends (42) are connected to each other.

9. The noise reduction and vibration damping device for an oil-free air compressor according to claim 8, characterized in that: The surface of the heat exchanger (4) is fitted with a fixed bracket (43), and the connecting end of the fixed bracket (43) is in contact with the front of the box (31), and the fixed bracket (43) is bolted to the contact surface (35) of the box (31).

10. The noise reduction and vibration damping device for an oil-free air compressor according to claim 1, characterized in that: The liquid cavity (32) is rectangular and is used to store the required shock-absorbing and noise-reducing liquid. The protective shell (21) is wrapped around the body (1) and can be immersed in the liquid in the liquid cavity (32) at the same time.

Images