An oil-free screw compressor muffler

Abstract

This utility model discloses an oil-free screw compressor muffler, including an intake pipe, an expansion chamber, and an exhaust pipe. The intake pipe includes an intake tube and a baffle. Multiple small holes are formed on the intake tube, all of which are inserted into the expansion chamber. The baffle seals one end of the intake tube, and the sealed end of the intake tube is inserted into the expansion chamber. The expansion chamber is a hollow structure with openings at both ends. The exhaust pipe is also open at both ends. The exhaust pipe is inserted into the expansion chamber from the other end.

Description

Technical Field

[0001] This utility model relates to a silencer, and more particularly to an oil-free screw compressor silencer. Background Technology

[0002] The history of screw compressors dates back to the 1930s, invented by Swedish engineer Alf Lysholm. Oil-free screw compressors are characterized by the elimination of lubricating oil, making them suitable for applications sensitive to lubrication, such as the pharmaceutical and food industries.

[0003] Oil-free screw compressors have a wide range of applications, performing particularly well in lubrication-sensitive applications such as the pharmaceutical and food industries. Furthermore, they also have important applications in the military and shipbuilding sectors. With technological advancements, the performance of oil-free screw compressors has been continuously optimized, making them essential equipment in many industries.

[0004] Oil-free screw compressors, due to their unique compressor mechanism, discharge high-speed pulsating airflow from the compressor main unit's exhaust port, accompanied by high-frequency noise. If this high-speed pulsating airflow is not treated, it can easily produce a sharp whistling sound as it flows through downstream gas pipelines and the user's gas storage tank. The high-frequency noise generated at the oil-free screw compressor main unit's exhaust port will also propagate through the gas pipelines. This noise can cause hearing damage to compressor maintenance personnel and also contribute to noise pollution in the compressor room or the area surrounding the gas storage tank.

[0005] Current technologies rarely incorporate internal silencers to control noise at the exhaust port of oil-free screw compressors. Some noise control measures are often installed externally, increasing installation space and difficulty for users. Furthermore, these noise control measures have not been tested and verified by the compressor manufacturer, often resulting in unsatisfactory noise reduction effects. Utility Model Content

[0006] This invention overcomes the shortcomings of the prior art and provides an oil-free screw compressor muffler.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows: an oil-free screw compressor muffler, comprising an intake pipe, an expansion chamber, and an exhaust pipe. The intake pipe includes an intake tube and a baffle; the intake tube has multiple small holes. All the small holes on the intake tube are inserted into the expansion chamber. The end face of the intake tube inserted into the expansion chamber is sealed by the baffle.

[0008] In a preferred embodiment of this invention, the exhaust pipe is inserted into the expansion chamber.

[0009] The total cross-sectional area of ​​all the holes is greater than the cross-sectional area of ​​the air intake pipe.

[0010] The intake pipe is directly connected to the exhaust port of the oil-free compressor main unit.

[0011] This utility model solves the defects existing in the background technology, and has the following beneficial effects: (1) The high-frequency pulsating airflow discharged from the exhaust port of the oil-free screw compressor passes through the intake pipe of the silencer and is divided into multiple airflows by multiple small holes on the intake pipe before entering the expansion chamber and then entering the exhaust pipe through the expansion chamber. At this time, the airflow discharged from the exhaust pipe tends to be stable and will not cause abnormal whistling in the subsequent gas delivery pipe and gas storage tank due to abnormal fluctuations in the airflow; (2) Since the oilless screw compressor silencer provided by this utility model can be used as an expansion silencer, the high-frequency noise discharged from the exhaust port of the oilless screw compressor will have a certain degree of noise reduction effect after entering the silencer.

[0012] (3) The structure is simple and easy to process. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Figure 1 This is a structural diagram of a preferred embodiment of the present invention; Figure 2 This is a schematic diagram of the airflow direction of a preferred embodiment of the present invention; In the picture: 100. Intake pipe; 101. Intake tube; 102. Baffle; 103. Multiple small holes 200. Expansion chamber; 201. Steel pipe; 202. First annular steel plate; 203. Second annular steel plate; 300. Exhaust pipe. Detailed Implementation

[0014] 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 one, not all, of the embodiments of the present utility model. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present utility model.

[0015] like Figure 1 , Figure 2As shown, an oil-free screw compressor muffler includes: an intake pipe 100, an expansion chamber 200, and an exhaust pipe 300. The intake pipe 100 includes an intake pipe 101 and a baffle 102; the intake pipe 101 has multiple small holes 103. All the small holes 103 on the intake pipe 101 are inserted into the expansion chamber 200. The expansion chamber 200 is composed of a steel pipe 201, a first annular steel plate 202, and a second annular steel plate 203. The end face of the intake pipe 101 inserted into the expansion chamber 200 is sealed by the baffle 102. A portion of the exhaust pipe 300 is inserted into the expansion chamber 200.

[0016] In use, the oil-free screw compressor muffler can be directly installed at the exhaust port of the oil-free screw compressor main unit, or it can be installed on the gas delivery pipe behind the exhaust port of the oil-free screw compressor main unit. The high-frequency pulsating airflow discharged from the exhaust port of the oil-free screw compressor main unit passes through the intake pipe 100 of the muffler and is divided into multiple airflows by multiple small holes 103 on the intake pipe 101, which then enter the expansion chamber 200 and then the exhaust pipe 300. At this time, the airflow discharged from the exhaust pipe 300 tends to be stable, and abnormal fluctuations in airflow will not cause abnormal whistling in the subsequent gas delivery pipe and gas storage tank. In addition, this utility model can also be used as an expansion type muffler, which can reduce the noise generated by the exhaust port of the oil-free screw compressor main unit to a certain extent.

[0017] Based on the preferred embodiments of this utility model described above, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A silencer for an oil-free screw compressor, characterized in that, It includes an intake pipe (100), an expansion chamber (200), and an exhaust pipe (300); the intake pipe (100) includes an intake pipe (101) and a baffle (102); the intake pipe (101) has multiple small holes (103); all the multiple small holes (103) on the intake pipe (101) are inserted into the expansion chamber (200); the end face of the intake pipe (101) inserted into the expansion chamber (200) is sealed by the baffle (102); the exhaust pipe (300) is inserted into the expansion chamber (200).

2. The oil-free screw compressor muffler according to claim 1, characterized in that: The expansion chamber (200) is composed of steel pipe (201), first annular steel plate (202), and second annular steel plate (203).

3. The oil-free screw compressor muffler according to claim 1, characterized in that: A portion of the exhaust pipe (300) is inserted into the expansion chamber (200), with the insertion length being 1 / 4 of the length of the expansion chamber (200).

4. The oil-free screw compressor muffler according to claim 1, characterized in that: The cross-sectional area of ​​the expansion chamber (200) is more than 5 times larger than the cross-sectional area of ​​the intake pipe (100).

5. The oil-free screw compressor muffler according to claim 1, characterized in that: The total effective area of ​​the multiple small holes (103) on the intake pipe (101) is greater than the effective cross-sectional area of ​​the intake pipe (100).

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