Composite silencer for reciprocating piston compressor

Abstract

The utility model discloses a compound muffler for a reciprocating piston compressor, which comprises a muffling mechanism communicated and mounted between two air ports of Y-shaped piston cylinders of the reciprocating piston compressor, the muffling mechanism comprises a breather pipe, the breather pipe is communicated and mounted at one ends of the air ports of the two Y-shaped piston cylinders, and the two ends of the two Y-shaped piston cylinders are communicated and mounted at the other ends of the air ports of the two Y-shaped piston cylinders. The two ventilation pipes are both in a U-shaped curled shape, and the outer surfaces of the portions, at the curled ends, of the ventilation pipes are sleeved with expansion tanks. By means of the noise reduction mechanism, noise pollution during operation of the compressor is effectively reduced, the working environment is improved, damage to hearing and physical and psychological health of operators is reduced, the compressor can be suitable for occasions such as hospitals, schools and offices with high noise requirements, and the application range of equipment is remarkably expanded.

Description

Technical Field

[0001] This utility model relates to the field of reciprocating piston compressor technology, specifically a composite silencer for reciprocating piston compressors. Background Technology

[0002] A reciprocating piston compressor is a type of compressor that compresses and transports gas by the reciprocating motion of a piston within a cylinder. During operation, it generates considerable noise, which can disrupt daily life, studies, and work. Therefore, it is essential to reduce the noise generated by reciprocating piston compressors.

[0003] For example, Chinese patent CN221003046U discloses a piston air compressor including a base plate, a compressor pump movably connected to the top of the base plate, casters fixedly connected to the four corners of the bottom of the base plate, a motor body fixedly connected to the top left side of the air compressor component, a piston body fixedly connected to the top right side of the air compressor component, and connecting blocks fixedly connected to the front and rear sides of the right side of the compressor pump, with connecting shells fixedly connected to the right sides of both connecting blocks. The beneficial effects achieved by this utility model are: through the coordinated use of the air compressor component, compressor pump, motor body, and piston body, the piston air compressor possesses the characteristics of simple structure, stability, reliability, and convenient maintenance; and through the coordinated use of the first and second buffer springs in the buffer component, it plays a buffering role during the operation of the air compressor component.

[0004] However, the aforementioned reciprocating air compressor generates significant noise during the process of expelling compressed air from the piston cylinder. This noise can make the working environment noisy, and prolonged exposure to such an environment can damage hearing and may also cause other health problems such as headaches, fatigue, and difficulty concentrating, thereby reducing work efficiency and quality. Utility Model Content

[0005] The purpose of this invention is to provide a composite silencer for reciprocating piston compressors to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A composite silencer for a reciprocating piston compressor includes: a silencing mechanism that connects and is installed between two air ports of a Y-shaped piston cylinder of the reciprocating piston compressor. The silencing mechanism includes a vent pipe that connects and is installed at one end of the air ports of the two Y-shaped piston cylinders. Both vent pipes are U-shaped and coiled. An expansion tank is fitted on the outer surface of the coiled end of the vent pipe.

[0008] Preferably, a partition plate is fixedly installed inside the expansion tank. The partition plate can divide the curved end of the U-shaped vent pipe into two chambers. Multiple sound-absorbing cottons are fixedly installed at both ends of the partition plate, and the sound-absorbing cottons are fixedly installed at equal intervals on the inner ring surface of the expansion tank.

[0009] Preferably, the vent pipes inside the expansion tank are divided into multiple segments by sound-absorbing cotton passing through them, and each segment of the vent pipe has air holes on its outer surface. The separated vent pipes can discharge compressed gas through the air holes on their outer surface and enter another segment through the sound-absorbing cotton, thereby forming an expansion cavity between the vent pipes and the expansion tank.

[0010] Preferably, a spacer ring is fixedly installed inside each segment of the vent pipe.

[0011] Preferably, a square tube is installed between the other ends of the two vent pipes. Two outer plates and one inner plate are fixedly installed inside the square tube. The inner plate is located between the two outer plates, thereby forming two resistive acoustic channels between the two outer plates and the inner plate. A guide pipe is connected between the two resistive acoustic channels and the guide pipe is connected to the storage tank of the reciprocating piston compressor.

[0012] Preferably, the wall material of the vent pipe is a porous metal composite material with a porosity of 30% to 50% and a pore size distribution in the range of 50-100 μm, which can form a scattering absorption effect on high-frequency noise.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] On the Y-shaped piston cylinder of the reciprocating piston compressor, a silencing mechanism is installed between two air ports, which are the intake port and the exhaust port, respectively. Acoustic optimization is achieved through an integrated silencing mechanism. When the final compression pressure exceeds the opening pressure of the silencing mechanism, the exhaust port forms a passage with the silencing mechanism. After the high-pressure gas is treated by a three-stage silencing structure (including an expansion chamber, micro-perforated plates, and sound-absorbing cotton), the noise level is significantly reduced before finally entering the gas storage tank.

[0015] This design effectively reduces noise pollution during compressor operation through the intervention of a silencing mechanism. This not only improves the working environment and reduces damage to the hearing and physical and mental health of operators, but also makes the compressor suitable for places with high noise requirements, such as hospitals, schools, and offices, significantly expanding the application range of the equipment. Attached Figure Description

[0016] Figure 1 This is a schematic diagram illustrating the application of the composite silencer for a reciprocating piston compressor according to this utility model.

[0017] Figure 2 This is a schematic diagram of the structure of the Y-shaped piston cylinder of this utility model;

[0018] Figure 3 This is a schematic diagram of the structure of the vent pipe and expansion tank of this utility model;

[0019] Figure 4 This is a schematic diagram of the spacer ring of this utility model;

[0020] Figure 5 This is a schematic diagram of the square tube structure of this utility model.

[0021] In the diagram: 1. Reciprocating piston compressor; 101. Y-shaped piston cylinder; 102. Air inlet; 2. Silencing mechanism; 201. Vent pipe; 202. Expansion tank; 203. Sound-absorbing cotton; 204. Partition plate; 205. Air hole; 206. Square tube; 207. Spacer ring; 208. Inner plate; 209. Resistive acoustic channel; 210. Air guide pipe; 211. Outer plate. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] like Figures 1-2 As shown, this embodiment provides a composite silencer for a reciprocating piston compressor, including: a silencer mechanism 2 that connects to two air ports 102 of a Y-shaped piston cylinder 101 installed in a reciprocating piston compressor 1. The silencer mechanism 2 includes a vent pipe 201 that connects to one end of the air ports 102 of the two Y-shaped piston cylinders 101. Both vent pipes 201 are U-shaped and coiled. An expansion tank 202 is fitted on the outer surface of the coiled end of the vent pipe 201. The Y-shaped piston cylinder 101 of the reciprocating piston compressor 1 is fixedly installed at the upper end of the outer surface of the tank.

[0024] like Figures 3-5As shown, the silencing mechanism 2 includes a vent pipe 201, which is connected to one end of the air port 102 of two Y-shaped piston cylinders 101. Both vent pipes 201 are U-shaped and coiled. An expansion tank 202 is fitted on the outer surface of the coiled end of the vent pipe 201. A partition plate 204 is fixedly installed inside the expansion tank 202 so that the partition plate 204 can divide the coiled end of the U-shaped vent pipe 201 into two chambers. Multiple sound-absorbing cotton 203s are fixedly installed at both ends of the partition plate 204, and the sound-absorbing cotton 203s are fixedly installed at equal intervals on the inner ring surface of the expansion tank 202.

[0025] Furthermore, the vent pipes 201 within the expansion tank 202 are divided into multiple segments by sound-absorbing cotton 203 passing through them. Each segment of the vent pipe 201 has vent holes 205 on its outer surface, allowing compressed gas to be discharged through these vent holes 205 and then pass through the sound-absorbing cotton 203 into another segment. This creates an expansion cavity between the vent pipes 201 and the expansion tank 202. Each segment of the vent pipe 201 is fixedly installed with… There is a partition ring 207, and a square tube 206 is installed between the other ends of the two vent pipes 201. Two outer plates 211 and one inner plate 208 are fixedly installed inside the square tube 206, and the inner plate 208 is located between the two outer plates 211, so that two resistive acoustic channels 209 are formed between the two outer plates 211 and the inner plate 208, and a guide pipe 210 is connected between the two resistive acoustic channels 209. The guide pipe 210 is connected to the storage tank of the reciprocating piston compressor 1.

[0026] Through the design of the vent pipe 201, expansion tank 202, sound-absorbing cotton 203, partition plate 204, square tube 206, resistive acoustic flow channel 209, and air guide pipe 210, the compressed high-pressure gas can be discharged from the interconnected air ports 102 and enter the U-shaped vent pipe 201. The U-shaped vent pipe structure can lengthen the gas flow path and continuously change the direction, which can buffer the impact force of the gas to a certain extent, while disrupting the airflow pattern and reducing the noise generated by the airflow. As the gas flows in, it enters the expansion tank 202 fitted on the outer surface of the vent pipe 201. The vent holes 205 on the outer surface of the vent pipe 201 allow an expansion cavity to be formed between the vent pipe 201 and the expansion tank 202. When gas enters the expansion cavity, the sudden increase in space reduces the airflow velocity. According to the principle of resistance silencing, sound waves will be reflected and interfered in the expansion cavity, and some sound energy will be reflected back, thus consuming sound energy and achieving a silencing effect. At the same time, the gas will also pass through the sound-absorbing cotton 203 installed at equal intervals inside the expansion tank 202. The porous structure of the sound-absorbing cotton 203 causes the air molecules to vibrate when the sound waves propagate within it. Due to the friction and viscous resistance between the air and the fibers of the sound-absorbing cotton 203, the sound energy is converted into heat energy and absorbed. The noise is further reduced by absorbing the gas. Furthermore, a partition ring 207 is installed inside the vent pipe 201 within the expansion tank 202. The partition ring 207 further stabilizes the airflow and regulates its speed. It prevents turbulence or eddies from forming within the vent pipe 201, allowing the gas to pass through the vent pipe 201 and expansion chamber more orderly, thus improving noise reduction efficiency. The gas, after being silenced by the vent pipe 201 and expansion tank 202, enters the square tube 206 from the other end of the vent pipe 201. The square tube 206 contains two resistive acoustic channels 209 formed by two outer plates 211 and one inner plate 208 for gas flow. The internal structure of the 09 is wave-like. When the sound waves carried by the gas propagate in the resistive acoustic channel 209, they interact with the sound-absorbing materials on the surfaces of the outer plate 211 and the inner plate 208. The sound waves cause the air inside the sound-absorbing material to vibrate, and the sound energy is converted into heat energy through friction and viscous resistance, thereby further absorbing and reducing noise. After the powerful noise reduction treatment, the operating noise of the compressor is greatly reduced, which can meet the needs of noise-sensitive places such as hospitals, schools, and precision instrument manufacturing workshops, expand the application scenarios of the equipment, and the stable airflow and air source quality also enable the compressor to be adapted to more equipment with high requirements for air source stability, thereby improving the equipment's versatility and market competitiveness.

[0027] To further improve the noise reduction effect, the wall material of the vent pipe 201 is a porous metal composite material. The porosity of the porous metal composite material is 30% to 50%, and the pore size is distributed in the range of 50-100μm, which can form a scattering absorption effect on high frequency noise.

[0028] Based on the above technical solutions, the working steps of this solution are summarized as follows:

[0029] On the Y-shaped piston cylinder 101 of the reciprocating piston compressor 1, a silencing mechanism 2 is installed between two air ports 102. The two air ports 102 are the intake port and the exhaust port, respectively. Acoustic optimization is achieved through the integrated silencing mechanism 2. The specific working process is as follows:

[0030] Inhalation phase:

[0031] When the crankshaft drives the piston assembly to move to the right, the intake port opens at the end of the piston stroke, allowing outside air to enter the cylinder block through the filter. At this time, the exhaust port remains sealed due to the pressure difference, ensuring effective intake volume.

[0032] Compression stage:

[0033] When the piston moves in the reverse direction (to the left), the intake port automatically closes before the piston reaches bottom dead center (achieving airtightness through a built-in check valve), and the gas inside the cylinder undergoes two-stage compression due to the dual-piston structure. At this time, the exhaust port remains sealed until the cylinder pressure reaches the set threshold.

[0034] Exhaust muffler stage:

[0035] When the final compression pressure exceeds the opening pressure of the silencing mechanism 2, the exhaust port forms a passage with the silencing mechanism 2. After the high-pressure gas is treated by the three-stage silencing structure (including an expansion chamber, a micro-perforated plate, and sound-absorbing cotton), the noise level is significantly reduced before finally entering the gas storage tank.

[0036] This design effectively reduces noise pollution during compressor operation through the intervention of the silencing mechanism 2. This not only improves the working environment and reduces damage to the hearing and physical and mental health of operators, but also makes the compressor suitable for places with high noise requirements such as hospitals, schools, and offices, significantly expanding the application range of the equipment.

[0037] All parts not described in this utility model are the same as or can be implemented using existing technology. Although embodiments of this utility model 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 this utility model, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A composite silencer for a reciprocating piston compressor, characterized in that, include: A silencing mechanism (2) is connected between two air ports (102) of a Y-shaped piston cylinder (101) installed in a reciprocating piston compressor (1). The silencing mechanism (2) includes a vent pipe (201), which is connected to one end of the air ports (102) of the two Y-shaped piston cylinders (101). Both vent pipes (201) are U-shaped and coiled. An expansion tank (202) is fitted on the outer surface of the vent pipe (201) at the coiled end. The expansion tank (202) is fixedly installed with a partition plate (204). The partition plate (204) can divide the curved end of the U-shaped vent pipe (201) into two chambers. Both ends of the partition plate (204) are fixedly installed with multiple sound-absorbing cotton (203), and the sound-absorbing cotton (203) is fixedly installed at equal intervals on the inner ring surface of the expansion tank (202). The ventilation pipes (201) inside the expansion tank (202) are divided into multiple segments by sound-absorbing cotton (203) passing through them. Each segment of the ventilation pipe (201) has an air hole (205) on its outer surface. The separated ventilation pipes (201) can discharge compressed gas through the air hole (205) on their outer surface and enter another segment through the sound-absorbing cotton (203), thereby forming an expansion cavity between the ventilation pipes (201) and the expansion tank (202).

2. The composite silencer for a reciprocating piston compressor according to claim 1, characterized in that: Each segment of the vent pipe (201) is fixedly installed with a spacer ring (207).

3. The composite silencer for a reciprocating piston compressor according to claim 2, characterized in that: A square tube (206) is installed between the other ends of the two vent pipes (201). Two outer plates (211) and one inner plate (208) are fixedly installed inside the square tube (206). The inner plate (208) is located between the two outer plates (211), thereby forming two resistive acoustic channels (209) between the two outer plates (211) and the inner plate (208). A guide pipe (210) is connected between the two resistive acoustic channels (209). The guide pipe (210) is connected to the storage tank of the reciprocating piston compressor (1).

4. The composite silencer for a reciprocating piston compressor according to any one of claims 1-3, characterized in that: The wall material of the vent pipe (201) is a porous metal composite material with a porosity of 30% to 50% and a pore size distribution in the range of 50-100 μm.

Images