CN221703813U - A water-cooled muffler for silent power stations - Google Patents

Abstract

The utility model relates to a water-cooled silencer for a silent power station, and belongs to the technical field of silent power stations. It comprises a silencer shell, which is divided into a primary exhaust silencer chamber and a secondary exhaust silencer chamber from top to bottom; a first expansion zone and a first damping zone are arranged in sequence in the primary exhaust silencer chamber; a second expansion zone and a second damping zone are arranged in the secondary exhaust silencer chamber, and the primary exhaust silencer chamber and the secondary exhaust silencer chamber are connected through a smoke channel arranged on the right side of the bottom wall of the primary exhaust silencer chamber; smoke enters the primary exhaust silencer chamber through the smoke inlet pipe on the left side of the silencer shell, flows into the secondary exhaust silencer chamber through the smoke channel, and is discharged through the smoke outlet on the left side of the bottom wall of the silencer shell. The high-temperature, high-pressure, and high-speed combustion exhaust gas is fully water-cooled to reduce its temperature and flow rate. According to the exhaust noise spectrum of the internal combustion engine, a damping resonance silencer chamber is designed, and after several (stages) of silencers, a lower exhaust noise is achieved.

Description

A water-cooled muffler for silent power stations

Technical Field

The utility model belongs to the technical field of silent power stations and relates to a water-cooled muffler for a silent power station.

Background Art

The silent power station is mainly composed of a shelter, an internal combustion engine, a generator, an inverter, an output port, etc. During the operation of the shelter, a large amount of heat and noise will be generated due to the work of the internal combustion engine, the generator and other components.

At present, ordinary silencers are unable to effectively reduce exhaust noise. The noise level of mainstream power station cabins on the market is above 75 decibels. The noise is relatively loud, causing noise pollution to the environment. It does not meet the requirements of the "Environmental Noise Pollution Prevention and Control Law of the People's Republic of China" and the "Urban Area Noise Standards of the People's Republic of China" that environmental noise pollution should not exceed 65 decibels.

In view of this, the present invention provides a water-cooled muffler for a silent power station to solve the above technical problems.

Utility Model Content

The purpose of the utility model is to overcome the shortcomings of the prior art, to provide a silent power station water-cooled muffler, and to achieve technical effects by technical means.

In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a silent power station water-cooled muffler, comprising a muffler shell, the muffler shell is divided into a primary exhaust muffler chamber and a secondary exhaust muffler chamber from top to bottom;

The first exhaust muffler chamber is provided with a first expansion zone and a first damping zone in sequence; the second exhaust muffler chamber is provided with a second expansion zone and a second damping zone, and the first exhaust muffler chamber is connected with the second exhaust muffler chamber through a smoke channel provided on the right side of the bottom wall of the first exhaust muffler chamber;

The smoke enters the primary exhaust muffler chamber through the smoke exhaust inlet pipe on the left side of the muffler shell, flows into the secondary exhaust muffler chamber through the smoke channel, and is discharged through the smoke exhaust outlet on the left side of the bottom wall of the muffler shell.

Furthermore, a cooling water pipeline is distributed on the outer surface of the first-stage exhaust muffler chamber, a cooling water inlet is arranged on one side of the first-stage exhaust muffler chamber, and a cooling water outlet is arranged on the other side of the first-stage exhaust muffler chamber.

Furthermore, a resonance muffler cavity is provided on the outer surface of the secondary exhaust muffler chamber.

Furthermore, the resonance silencing cavity is filled with glass wool.

Furthermore, an exhaust return damping plate is provided in the first damping zone.

Furthermore, an exhaust return damping block coated with sound-absorbing cotton is provided in the second damping zone.

Furthermore, the muffler shell is made of cold-rolled steel plate or stainless steel plate.

The utility model has the following beneficial effects:

1. Excellent noise reduction effect. The high-temperature, high-pressure, and high-speed combustion exhaust gas discharged by the internal combustion engine is fully cooled by water to reduce its temperature, pressure, and flow rate. According to the exhaust noise spectrum of the internal combustion engine, the expansion, damping, and resonance anechoic chambers are designed. After several (stages) of anechoic, the exhaust noise is lowered.

2. Setting the expansion zone can perform resistant silencing, and setting the damping zone can, on the one hand, damp and reduce noise, and at the same time serve as heat dissipation fins for exhaust gas cooling, and conduct heat for heat exchange between exhaust gas and cooling water, so that exhaust gas heat dissipation is more sufficient.

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings herein are incorporated into and constitute a part of this specification, and together with the description, are used to explain the principles of the utility model.

In order to more clearly illustrate the new embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

FIG1 is a schematic diagram of a water-cooled muffler housing of the present invention;

FIG2 is a schematic diagram of the resonance muffler cavity of the water-cooled muffler of the present invention;

FIG3 is a schematic diagram of the internal water and smoke path layout of the water-cooled muffler of the present invention.

Among them: 1 is the first-stage exhaust silencer chamber; 2 is the second-stage exhaust silencer chamber; 3 is the smoke channel; 11 is the first expansion zone; 12 is the first damping zone; 21 is the second expansion zone; 22 is the second damping zone; 23 is the resonance silencer chamber; 4 is the smoke exhaust inlet pipe; 5 is the smoke exhaust outlet; 6 is the cooling water inlet; 7 is the cooling water outlet; 8 is the cooling water pipeline; 9 is the muffler shell; 10 is the bracket.

DETAILED DESCRIPTION

Here, exemplary embodiments will be described in detail, and the embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the utility model. Instead, they are only examples of devices consistent with some aspects of the utility model described in detail in the attached claims.

Example

A water-cooled muffler for a silent power station, comprising a muffler housing 9, wherein the muffler housing 9 is divided into a primary exhaust muffler chamber 1 and a secondary exhaust muffler chamber 2 from top to bottom;

The first exhaust muffler chamber 1 is provided with a first expansion zone 11 and a first damping zone 12 in sequence; the second exhaust muffler chamber 2 is provided with a second expansion zone 21 and a second damping zone 22, and the first exhaust muffler chamber 1 is connected to the second exhaust muffler chamber 2 through a smoke channel 3 provided on the right side of the bottom wall of the first exhaust muffler chamber 1;

The smoke enters the primary exhaust muffler chamber 1 through the smoke exhaust inlet pipe 4 on the left side of the muffler housing 9, flows into the secondary exhaust muffler chamber 2 through the smoke channel 3, and is discharged through the smoke exhaust outlet 5 on the left side of the bottom wall of the muffler housing 9.

The exhaust duct is first designed as the first expansion zone 11 with a sudden change in the exhaust pipe diameter, which is convenient for resistance silencing. Then it passes through the first damping zone 12, which, on the one hand, damps and reduces noise, and on the other hand, conducts heat for heat exchange between the exhaust and cooling water, making the exhaust heat dissipation more sufficient. According to the exhaust noise spectrum of the power station internal combustion engine, a two-stage exhaust silencing chamber 2 with expansion, damping, resonance and sound absorption is designed. In this way, after several levels of silencing, lower exhaust noise can be achieved, and the exhaust impedance is small, and the power loss caused by noise reduction is small.

A cooling water pipe 8 is distributed on the outer surface of the first-stage exhaust muffler chamber 1 , a cooling water inlet 6 is provided on one side of the first-stage exhaust muffler chamber 1 , and a cooling water outlet 7 is provided on the other side of the first-stage exhaust muffler chamber 1 .

The water-cooled muffler firstly cools the high-temperature, high-pressure and high-speed combustion exhaust gas discharged from the internal combustion engine through a special water cooling pipe 8, thereby significantly reducing its temperature. According to the ideal gas state equation: pV=nRT, the exhaust pressure is reduced, the exhaust expansion volume is reduced, and the exhaust flow rate is reduced, thereby reducing the exhaust expansion and airflow noise.

The cooling water channel 8 is distributed on the outer surface of the first-stage exhaust muffler chamber 1. The cooling water channel 8 flows back along the outer surface to increase the flow area and eliminate the flow dead corner, so as to fully cool the exhaust gas.

The outer surface of the secondary exhaust muffler chamber 2 is provided with a resonance muffler cavity 23 .

The resonance silencing cavity 23 is filled with glass wool.

The outer shell of the exhaust channel of the second expansion zone 21 and the second damping zone 22 is a mesh plate, and the mesh plate and the muffler shell 9 are between a resonant muffler cavity 23. Specifically, the mesh plate and the muffler shell 9 form a blind hole space, which is equivalent to each perforation of the mesh plate and the cavity behind forming a Helmholtz resonator, i.e., a resonant sound-absorbing structure. When the exhaust airflow noise in the muffler channel is at the same frequency as the air vibration in the cavity, it resonates, and rubs against the hole wall at the perforation to consume sound energy and reduce noise. In addition, the resonant muffler cavity 23 is filled with ultra-fine glass wool. On the one hand, the resonant cavity resonates to reduce noise, and on the other hand, the glass wool absorbs sound and reduces noise.

An exhaust return damping plate is provided in the first damping area 12 .

The exhaust return damping plate is provided to damp and reduce noise on the one hand, and at the same time serve as a heat dissipation fin for exhaust gas cooling, conduct heat for heat exchange between exhaust gas and cooling water, make the exhaust gas heat dissipation more sufficient, and increase the flow path length of the airflow, that is, the residence time, so that the flue gas is fully cooled.

An exhaust return damping block coated with sound-absorbing cotton is provided in the second damping area 22 .

The exhaust return damping block has the functions of sound absorption and damping noise reduction, reducing the noise generated by the airflow during flow.

The muffler housing 9 is made of cold-rolled steel plate or stainless steel plate. The water-cooled muffler is fixedly installed in the silent power station through a bracket 10.

The working process of the utility model is as follows: the smoke enters the primary exhaust muffler chamber 1 through the smoke inlet pipe 4 on the left side of the muffler shell 9, first flows through the first expansion zone 11 with a sudden change in the exhaust pipe diameter, and is damped and noise-resistant through the first damping zone 12. While flowing through the primary exhaust muffler chamber 1, the smoke is cooled by the cooling pipe. The smoke enters the secondary exhaust muffler chamber 2 through the smoke channel 3, and flows through the second expansion zone 21 and the second damping zone 22 with a sudden change in the pipe diameter in turn for damping and noise-resistant. While flowing through the secondary exhaust muffler chamber 2, the resonant muffler chamber 23 is used to absorb sound and resist noise. After multi-stage noise resistance, the smoke is finally discharged through the smoke outlet 5 on the left side of the bottom wall of the muffler shell 9.

The above description is only a specific embodiment of the present invention, so that those skilled in the art can understand or implement the present invention. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention.

It should be understood that the present invention is not limited to the above-described contents, and various modifications and changes can be made without departing from its scope. The scope of the present invention is limited only by the appended claims.

Claims (7)

1. A silent water-cooled muffler for a power station, comprising a muffler housing (9), characterized in that the muffler housing (9) is divided into a primary exhaust muffler chamber (1) and a secondary exhaust muffler chamber (2) at the top and bottom; The first exhaust muffler chamber (1) is provided with a first expansion zone (11) and a first damping zone (12) in sequence; the second exhaust muffler chamber (2) is provided with a second expansion zone (21) and a second damping zone (22); the first exhaust muffler chamber (1) and the second exhaust muffler chamber (2) are connected via a smoke channel (3) provided on the right side of the bottom wall of the first exhaust muffler chamber (1); The smoke enters the primary exhaust muffler chamber (1) through the smoke exhaust inlet pipe (4) on the left side of the muffler housing (9), flows into the secondary exhaust muffler chamber (2) through the smoke passage (3), and is discharged through the smoke exhaust outlet (5) on the left side of the bottom wall of the muffler housing (9). 2. A silent water-cooled silencer for a power station according to claim 1, characterized in that a cooling water pipe (8) is distributed on the outer surface of the first-stage exhaust silencer chamber (1), a cooling water inlet (6) is provided on one side of the first-stage exhaust silencer chamber (1), and a cooling water outlet (7) is provided on the other side of the first-stage exhaust silencer chamber (1). 3. A silent water-cooled silencer for a power station according to claim 1, characterized in that a resonance silencer cavity (23) is provided on the outer surface of the secondary exhaust silencer chamber (2). 4. A silent water-cooled silencer for a power station according to claim 3, characterized in that the resonance silencer cavity (23) is filled with glass wool. 5. A silent water-cooled muffler for a power station according to claim 1, characterized in that an exhaust return damping plate is provided in the first damping zone (12). 6. A silent water-cooled muffler for a power station according to claim 1, characterized in that an exhaust return damping block coated with sound-absorbing cotton is provided in the second damping zone (22). 7. A silent water-cooled silencer for a power station according to claim 1, characterized in that the silencer shell (9) is made of cold-rolled steel plate or stainless steel plate.