M-shaped silencer

Abstract

The utility model discloses an M-shaped silencer which comprises a connecting piece and a silencing piece, a first air inlet hole is formed in the center of the connecting piece, and a plurality of second air inlet holes are evenly distributed in the circumference of the outer side of the first air inlet hole. The silencing piece comprises a first barrel-shaped body and a second barrel-shaped body located on the inner side of the first barrel-shaped body, and further comprises an annular end face and a round end face. The left end of the first cylindrical body is fixedly connected with the right end of the connecting piece, the right end of the first cylindrical body is connected with the outer edge of the annular end face, the right end of the second cylindrical body is connected with the inner edge of the annular end face, and the left end of the second cylindrical body is connected with the outer edge of the circular end face. The circular end face corresponds to the first air inlet hole in position, and an annular cavity corresponding to the second air inlet hole is defined by the first barrel-shaped body, the second barrel-shaped body and the annular end face. According to the utility model, the problems of small area of a silencing part and poor noise reduction effect of the traditional silencer due to space limitation are solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a muffler technical field, specifically to a muffler. BACKGROUND

[0002] As a key equipment for reducing intake or exhaust noise, pneumatic muffler has been widely used in industrial automation, precision machinery manufacturing, automobile, aviation, electric power and petroleum chemical industry and other fields due to its simple structure. Its main function is to reduce the noise generated during the operation of pneumatic equipment, thereby effectively improving the comfort and safety of the working environment. However, the pneumatic muffler on the current market is limited by the internal space layout in the design of the muffling part, resulting in relatively small muffling area, which affects the noise reduction effect. SUMMARY

[0003] The utility model provides a kind of M muffler, its purpose is: solve the problem of the small area of muffling part of traditional muffler due to space limitation, poor noise reduction effect.

[0004] The utility model technical scheme is as follows:

[0005] A kind of M muffler, including connecting piece and muffling part, the first inlet hole is set in the center of connecting piece, and the outer side of first inlet hole is uniformly distributed with multiple second inlet holes;The muffling part includes first cylinder and the second cylinder located in the inboard of first cylinder, and also includes annular end face and circular end face;The left end of first cylinder is fixedly connected with the right end of connecting piece, the right end of first cylinder is connected with the outer edge of annular end face, the right end of second cylinder is connected with the inner edge of annular end face, and the left end of second cylinder is connected with the outer edge of circular end face;The circular end face corresponds to the position of first inlet hole, and the first cylinder, second cylinder and annular end face form annular chamber corresponding to second inlet hole.

[0006] As a further improvement of the utility model, the left end of first cylinder is matched with the annular limiting structure of the right end of connecting piece to realize fixed connection.

[0007] As a further improvement of the utility model, the right end of first inlet hole is provided with counterbore matched with the left end of second cylinder.

[0008] As a further improvement of the utility model, the muffling part is an integrally formed sintered body.

[0009] Specifically, the material of muffling part is bronze or stainless steel.

[0010] Compared with the prior art, the utility model has the following positive effects:

[0011] (1) The utility model discloses a second cylindrical body is added in the cavity, and the contact area of sintered body and airflow is effectively increased, thereby improving the noise reduction effect under the condition that the appearance and size are kept unchanged.

[0012] (2) The utility model discloses a plurality of second air inlets are arranged on the outside of the first air inlet, and the second air inlets can uniformly introduce airflow into the annular chamber, fully utilize the increased sintered body area of the annular chamber, and further improve the noise reduction effect. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 Structure diagram of the M-type muffler of the utility model Figure One (Axial sectional view);

[0014] Figure 2 Structure diagram of the M-type muffler of the utility model Figure Two (Left view).

[0015] Mark explanation:

[0016] 1, connecting piece, 1-1, first air inlet, 1-2, second air inlet, 1-3, counterbore, 1-4, annular limiting structure, 2, noise reduction piece, 2-1, annular end face, 2-2, circular end face. DETAILED DESCRIPTION

[0017] The technical scheme and technical effect of the utility model will be described in detail below with reference to the drawings. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments.

[0018] As Figure 1 , an M-type muffler, comprising a connecting piece 1 and a noise reduction piece 2, the connecting piece 1 is tightly matched with the noise reduction piece 2 and is sintered and fixed. The connecting piece 1 is provided with external threads for mounting and connecting the muffler.

[0019] The connecting piece 1 is provided with a first air inlet 1-1 in the center, and a plurality of second air inlets 1-2 are uniformly distributed on the circumference of the outside of the first air inlet 1-1. The right side of the connecting piece 1 is provided with an annular limiting structure 1-4, and the right end of the first air inlet 1-1 is provided with a counterbore 1-3. The noise reduction piece 2 comprises a first cylindrical body and a second cylindrical body located on the inside of the first cylindrical body, and further comprises an annular end face 2-1 and a circular end face 2-2. The left end of the first cylindrical body is fixedly connected with the right end of the connecting piece 1, the right end of the first cylindrical body is connected with the outer edge of the annular end face 2-1, and the right end of the second cylindrical body is connected with the inner edge of the annular end face 2-1. The left end of the second cylindrical body is connected with the outer edge of the circular end face 2-2. The axial section of the noise reduction piece 2 is in the shape of M as a whole. The left end of the first cylindrical body is tightly matched with the annular limiting structure 1-4, and the left end of the second cylindrical body is tightly matched with the counterbore 1-3 of the right end of the first air inlet 1-1.

[0020] The first cylindrical body, the second cylindrical body and the annular end face 2-1 enclose an annular chamber corresponding to the second gas inlet hole 1-2.

[0021] Preferably, as the core part of the muffler, the muffling member 2 is a sintered porous material made of bronze or stainless steel. The sintered body is full of tiny pores through which gas can pass smoothly, and at the same time, the sound is weakened by diffusion, reflection and damping when passing through the material.

[0022] The following illustrates the working principle of the muffler of the utility model.

[0023] In use, the muffler is connected with the gas outlet end of the device through the external thread on the connecting member 1. The gas flow is first dispersed into multiple small gas flows through the first gas inlet hole 1-1 in the center of the connecting member 1 and the multiple second gas inlet holes 1-2, thereby reducing the gas flow speed and reducing the turbulence phenomenon. Then, the gas flow passing through the first gas inlet hole 1-1 passes through the circular end face 2-2, and the gas flow passing through the second gas inlet hole 1-2 passes through the first cylindrical body, the second cylindrical body and the annular end face 2-1. The sound is weakened by diffusion, reflection and damping when passing through the sintered body material, thereby achieving the noise reduction effect. Moreover, due to the addition of the second cylindrical body, the area of the sintered body that can be passed through is greatly increased, and the noise reduction effect is improved. Further, the gas flow can also be reflected in the annular chamber, and this reflection effect plays an auxiliary role in the diffusion of the gas flow in the sintered body. The muffler can effectively reduce noise by multiple mechanisms such as gas flow dispersion, chamber reflection and diffusion absorption and damping of the sintered porous material, thereby improving the working environment, enhancing comfort and safety.

[0024] It should be noted that for those skilled in the art, it is obvious that the utility model is not limited to the details of the above exemplary embodiments, and the utility model can be implemented in other specific forms without departing from the spirit or basic characteristics of the utility model. The scope of the utility model is defined by the claims rather than the above description.

Claims

1. A Muffler of the M type comprising a connecting piece (1) and a muffling piece (2), characterized in that: The connecting piece (1) is provided with a first air inlet hole (1-1) in the center, and a plurality of second air inlet holes (1-2) are uniformly distributed on the outer side of the first air inlet hole (1-1); The muffling piece (2) comprises a first cylindrical body and a second cylindrical body located in the inner side of the first cylindrical body, and further comprises an annular end face (2-1) and a circular end face (2-2); the left end of the first cylindrical body is fixedly connected with the right end of the connecting piece (1), the right end of the first cylindrical body is connected with the outer edge of the annular end face (2-1), the right end of the second cylindrical body is connected with the inner edge of the annular end face (2-1), and the left end of the second cylindrical body is connected with the outer edge of the circular end face (2-2); The circular end face (2-2) corresponds to the position of the first air inlet hole (1-1), and the first cylindrical body, the second cylindrical body and the annular end face (2-1) form a ring-shaped cavity corresponding to the second air inlet hole (1-2).

2. The M-type muffler of claim 1, wherein: The left end of the first cylindrical body is fixedly connected with the right end of the connecting piece (1) through cooperation with the annular limiting structure (1-4).

3. The M-type muffler of claim 1, wherein: The right end of the first air inlet hole (1-1) is provided with a counterbore (1-3) matched with the left end of the second cylindrical body.

4. The M-type muffler of claim 1, wherein: The muffling piece (2) is an integral sintered body.

5. The M-type muffler of claim 4, wherein: The material of the muffling piece (2) is bronze or stainless steel.

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