Silencer for vacuum pump and vacuum pump

Abstract

The utility model provides a silencer for a vacuum pump. The silencer comprises an outer shell, an air inlet pipe, an exhaust pipe, a first cavity, a second cavity, a third cavity, a fourth cavity, a fifth cavity, a first pipeline, a second pipeline and a Helmholtz resonator, wherein the air inlet pipe and the exhaust pipe are communicated with the outer shell, and the first cavity, the second cavity, the third cavity, the fourth cavity and the fifth cavity are arranged in the outer shell. One end of the air inlet pipe communicates with the first cavity through the air inlet of the shell, and the other end is connected with an exhaust port of the vacuum pump; the first chamber is communicated with one end of the first porous silencing pipe through a first pipeline; the side wall of the first porous silencing pipe is communicated with the third chamber through a plurality of silencing holes, the other end of the first porous silencing pipe is communicated with the fourth chamber, and a Helmholtz resonator is arranged in the fourth chamber; the third chamber is communicated with one end of a second porous hush pipe through a second chamber, the other end of the second porous hush pipe is communicated with a fifth chamber through a second pipeline, and the fifth chamber is communicated with an exhaust pipe through an exhaust port of the shell. The utility model further provides a silencer.

Description

TECHNICAL FIELD

[0001] The utility model relates to a muffler, especially a muffler of a vacuum pump. BACKGROUND

[0002] Nowadays, the environmental protection requirement of enterprise is more and more strict, in addition to waste gas, waste material and waste water, the pollution of noise also has higher requirement. The inhibition of noise is also the performance of product performance, which helps to establish brand image. The noise pipe using double-layer pipeline is filled with glass wool in the middle to isolate noise diffusion. The double-layer design of the noise pipe can only reduce the noise diffusion of the pipe wall, and the noise of the exhaust port of the vacuum pump cannot be reduced. Since most of the customers will not carry out noise reduction treatment on the exhaust port of the vacuum pump, a small part of the customers will lead the exhaust port to the outdoor, so the noise reduction effect is limited. UTILITY MODEL CONTENTS

[0003] The utility model solves the main technical problem to provide a kind of muffler for vacuum pump, exhaust port noise also has inhibitory effect on the basis of reducing the noise of the pipe wall of vacuum pump.

[0004] In order to solve the above technical problems, the utility model provides a kind of muffler for vacuum pump, including shell, the air inlet pipe and exhaust pipe of intercommunication shell, the first chamber, second chamber, third chamber, fourth chamber, fifth chamber, first pipeline, second pipeline and Helmholtz resonator being set in shell;

[0005] One end of the air inlet pipe is communicated with the first chamber through the air inlet of the shell, and the other end is used to be connected with the exhaust port of the vacuum pump;The first chamber is communicated with one end of the first porous sound attenuation pipe through the first pipeline;The side wall of the first porous sound attenuation pipe is communicated with the third chamber through a plurality of sound attenuation holes, the other end of the first porous sound attenuation pipe is communicated with the fifth chamber, and the Helmholtz resonator is built in the fifth chamber;

[0006] The third chamber is communicated with one end of the second porous sound attenuation pipe through the second chamber, and the other end of the second porous sound attenuation pipe is communicated with the fourth chamber through the second pipeline, and the fourth chamber is communicated with the exhaust pipe through the exhaust port of the shell.

[0007] In a preferred embodiment: the air inlet pipe is provided with two joints for connecting temperature sensor and pressure sensor.

[0008] In a preferred embodiment: the bottom of the first chamber is provided with a drain port.

[0009] The utility model further provides a kind of vacuum pump, is equipped with the muffler as described above.

[0010] Compared with prior art, the technical scheme of the utility model has the following beneficial effects:

[0011] The utility model provides a silencer for vacuum pump adopts the way of external to introduce the air of vacuum pump exhaust port output into the silencer, therefore can reduce the basic vacuum pump pipe wall noise to the vacuum pump exhaust port noise also has the inhibition effect. BRIEF DESCRIPTION OF DRAWINGS

[0012] Fig. 1 It is the appearance view of silencer in the utility model preferred embodiment;

[0013] Fig. 2 It is the internal schematic view of silencer in the utility model preferred embodiment. DETAILED DESCRIPTION

[0014] In order to make the technical scheme and characteristics of the utility model more clear, the utility model is further explained in detail in the following with the drawings and specific examples, and it should be understood that these examples are only used for explaining the utility model and are not used for limiting the scope of the utility model, and after reading the utility model, the modification of various equivalent forms of the utility model of those skilled in the art all fall within the range defined by the claims attached to the present application.

[0015] REFERENCE Figs. 1-2 The embodiment provides a silencer for vacuum pump, which comprises a shell 1, a gas inlet pipe 2 and an exhaust pipe 3 communicated with the shell 1, a first chamber 4, a second chamber 5, a third chamber 6, a fourth chamber 7, a fifth chamber 8, a first pipeline 9, a second pipeline 10 and a Helmholtz resonator 11 arranged in the shell 1.

[0016] One end of the gas inlet pipe 2 is communicated with the first chamber 4 through the gas inlet of the shell 1, and the other end is used for being connected with the exhaust port of the vacuum pump; the first chamber 4 is communicated with one end of a first porous silencer pipe 13 through the first pipeline 9; the side wall of the first porous silencer pipe 13 is communicated with the third chamber 6 through a plurality of silencer holes, the other end of the first porous silencer pipe 13 is communicated with the fourth chamber 7, and the Helmholtz resonator 11 is arranged in the fourth chamber 7.

[0017] The third chamber 6 is communicated with one end of a second porous silencer pipe 14 through the second chamber 5, the other end of the second porous silencer pipe 14 is communicated with the fifth chamber 8 through the second pipeline 10, and the fifth chamber 8 is communicated with the exhaust pipe 3 through the exhaust port of the shell 1.

[0018] In the embodiment, the gas inlet pipe 2 is provided with two joints for connecting a temperature sensor and a pressure sensor.

[0019] In use, the gas enters the first chamber 4 through the gas inlet pipe 2, and the drain 12 at the bottom of the first chamber 4 is used to remove the water vapor accumulated in the muffler. The gas in the first chamber 4 enters the fourth chamber 7 through the first pipe 9 and the first porous muffling pipe 13 and the second porous muffling pipe 15 at the bottom, and a small part enters the third chamber 6; the gas in the fourth chamber 7 is processed by the Helmholtz resonator 11 to reduce the noise in a specific frequency band; the air after noise reduction and the gas entering the third chamber 6 through the first porous muffling pipe 13 enter the second chamber 5 through the third porous muffling pipe 16, and the gas in the second chamber 5 enters the fifth chamber 8 through the fourth porous muffling pipe 14 above and the second pipe 10, and the gas in the fifth chamber 8 is discharged by the gas outlet pipe 3.

[0020] The above-mentioned muffler for a vacuum pump uses an external mode to introduce the air output by the exhaust port of the vacuum pump into the muffler for muffling, so that the noise of the exhaust port of the vacuum pump can be suppressed in addition to the noise of the pipe wall of the vacuum pump

[0021] The above is only one specific embodiment of the present application, but the design concept of the present application is not limited thereto, and any non-substantial change to the present application using this concept shall be deemed as an infringement of the protection scope of the present application.

Claims

1. A muffler for a vacuum pump, characterized in that The silencer comprises a shell, an air inlet pipe and an air outlet pipe connected to the shell, a first chamber, a second chamber, a third chamber, a fourth chamber, a fifth chamber, a first pipe and a Helmholtz resonator arranged in the shell; One end of the air inlet pipe is connected to the first chamber through an air inlet of the shell, and the other end is used for connecting to an air outlet of a vacuum pump; the first chamber is connected to one end of a first porous sound-absorbing pipe through the first pipe; the side wall of the first porous sound-absorbing pipe is connected to the third chamber through a plurality of sound-absorbing holes, and the other end of the first porous sound-absorbing pipe is connected to the fourth chamber, and the fourth chamber is arranged with the Helmholtz resonator; The third chamber is connected to one end of a second porous sound-absorbing pipe through the second chamber, and the other end of the second porous sound-absorbing pipe is connected to the fifth chamber through the second pipe, and the fifth chamber is connected to the air outlet pipe through an air outlet of the shell.

2. A silencer for a vacuum pump according to claim 1, characterized in that: The air inlet pipe is provided with two joints for connecting a temperature sensor and a pressure sensor.

3. A silencer for a vacuum pump according to claim 1, characterized in that: The bottom of the first chamber is provided with a drain hole.

4. A vacuum pump, characterized by The silencer of any one of claims 1-3 is assembled.

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