CN2918755Y - Generating set mute box apparatus - Google Patents

Abstract

The utility model relates to a silent box device for a generator set, which belongs to the field of noise control of the generator set. The device mainly includes a box shell (1), an air inlet muffler (3), an internal combustion engine exhaust muffler (4), and an exhaust muffler 7; wherein, the entire generator set is arranged inside the box body 1, and the air inlet muffler 3 Located at the front of the box 1, there are two in total, located on both sides of the generator and the control cabinet respectively, supported by the base, and the upper edge is close to the top of the box 1; the exhaust muffler 7 can be tightly filled in the box 1 Tail, width and height are equal to the width and height of the box inner wall section, is cuboid structure, internal combustion engine exhaust muffler 4 is installed on the exhaust pipe of generator set, is positioned at the outside of box body 1. The utility model has the advantages of compact structure, which makes the volume of the box as small as possible and reduces the cost. The heat dissipation performance is good, and the noise can be reduced more effectively, so that the noise in the short range can be reduced to below 75dB.

Description

Generator set mute box device

technical field

The utility model relates to a sound box device for a generating set, which belongs to the field of noise control of the generating set.

Background technique

Today, with the increasing degree of modernization, generator sets, as the backup power supply of industrial equipment, play a very important role in ensuring the normal operation of the business, especially with the vigorous development of computer networks and communications, this equipment plays an important role in the reliability of power supply. The requirements are also increasing day by day, because the UPS power supply has the problem of long power supply time, which makes the generator set have a broad development space in people's production and life. It is not only indispensable in mines and factories, but also appears near densely populated telecommunications and telephone offices. However, while the generating set provides convenience for people, it also affects our living environment because of the noise and emission of the generating set itself, especially the noise of the generating set directly affects people's work and life.

There are many types of mute boxes on the market at present, but the products for large-scale units generally adopt traditional noise-absorbing and sound-absorbing structures, which cannot effectively eliminate the noise of the unit. In addition, in order to increase the noise reduction, the ventilation area is small, the back pressure of the equipment is large, resulting in a large power loss, the overall noise control level of the unit is not high, and it cannot meet the requirements of the current environmental standards. In places with high noise standards, it is better to carry out complex The secondary noise reduction design increases the overall input cost.

Utility model content

The purpose of the utility model is to overcome the defects in the noise control of the existing generating set, and provide a silent box device for the generating set. The device has a compact structure, good heat dissipation performance, and can effectively control and reduce noise in a short distance.

In order to achieve the above-mentioned purpose, the technical scheme adopted by the utility model is shown in Fig. 1 to Fig. 3 . The device mainly includes a box body 1, an air inlet muffler 3, an internal combustion engine exhaust muffler 4, and an exhaust outlet muffler 7; wherein, the entire generator set is arranged inside the box body 1, and the air inlet muffler 3 is located at the front of the box body 1 , there are two in total, located on both sides of the generator 12 and the control cabinet 11, supported by the base, and the upper edge is close to the top of the box 1; the exhaust muffler 7 can be tightly filled in the tail of the box 1, and its cross-sectional shape Compatible with the cross-sectional shape of the inner wall of the box; a space sound absorber 5 is arranged between the air outlet muffler 7 and the cooling water tank 16, and the sound absorber is made of sound absorbing material; the internal combustion engine exhaust muffler 4 is installed on the generator set On the exhaust pipe, it is located outside the box body 1, and there are maintenance operation doors 6 on both sides of the box body 1, which are close to the air intake shutters 2 on both sides; at the front of the box body 1, corresponding to the control cabinet The position is provided with control observation window 9.

An exhaust louver 8 is arranged outside the muffler 7 at the air outlet, and an air inlet louver 2 is arranged outside the muffler 3 .

The air inlet muffler 3, the air outlet muffler 7, and the space sound absorbing body 5 are all made of a muffler sheet 10, and the muffler sheet 10 is made of a three-layer plate structure, the two side plates are non-metallic perforated plates, and the middle is a Metal steel plates, filled with sound-absorbing materials between the plates, the sound-absorbing materials are non-metallic fiber porous materials or products.

The box body 1 adopts a board-air-board structure, and porous sound-absorbing materials are filled in the air layer.

Described air intake louvers 2 and exhaust louvers 8 are rainproof louvers.

The shape of the mufflers 10 forming the exhaust muffler 7 is a folded plate, which is to increase the length of sound absorption on the one hand, and to avoid direct sound transmission on the other hand.

The air outlet muffler 7 is a cuboid structure, and its width and height are equal to the width and height of the section of the inner wall of the box.

The control observation window 9 is a small control door with a double glass for operating the control cabinet and viewing the operating conditions of the unit.

The utility model is aimed at the distribution of the main noise source of the generator set and the characteristics of the noise. In order to effectively control various noises, control technologies such as sound insulation, sound absorption and noise elimination are used to control and process the noise at different positions:

1) Air intake noise reduction control system: It consists of air intake louvers 2 and air intake muffler 3 which are arranged near the two side walls of the front end of the generating set. The air intake passes through the air intake louvers 2 and the air intake muffler 3 successively before entering the mute box. In this way, the outward transmission of the noise of the unit can be suppressed, and the noise transmitted from the unit to the outside of the mute box can be reduced.

2) Smoke exhaust and noise reduction control system: the exhaust muffler 4 of the internal combustion engine is installed on the exhaust pipe of the internal combustion engine, which can effectively reduce the exhaust noise. This system actually uses two-stage exhaust mufflers. The first-stage exhaust muffler is the muffler configured by the generator itself, and the second-stage exhaust muffler is the newly installed internal combustion engine exhaust muffler 4. After passing through the two-stage mufflers, the exhaust noise It can be reduced by about 30dB.

3) Exhaust air noise reduction control system: Since the air outlet has complex noise and high noise level, and it is forced air exhaust, the noise is easy to radiate outward, so the exhaust air muffler 7 and the space sound absorbing body that are longer than the air inlet muffler 3 are used 5 composition. In this way, the sound wave can be vertically incident on the space sound absorbing body 4, which is beneficial to energy absorption, and the front and rear spaces can form a resistant muffler, which can more effectively suppress the outward radiation of noise.

4) Sound insulation and sound absorption control system: Since the box body 1 adopts a board-air-board structure, and porous sound-absorbing materials are filled in the air layer, this design can effectively absorb and block the noise from going out Radiation, in order to reduce the transmission of noise from doors, windows and voids, these parts are specially sealed.

Beneficial effects of the utility model: compact structure, good heat dissipation performance, can effectively control and reduce noise in a short distance, so that the noise can be reduced to below 75db, meets the standard required by the national environment, has little impact on the surrounding environment, and can be widely used In places with high environmental requirements.

Description of drawings

Figure 1: Schematic diagram of the side view of the silent box device of the generator set

Figure 2: Schematic diagram of the top view of the silent box device of the generator set

Figure 3: Schematic diagram of the left view of the silent box device of the generator set

In the figure: 1. Cabinet, 2. Air intake louvers, 3. Air intake muffler, 4. Internal combustion engine exhaust muffler, 5. Space sound absorbing body, 6. Maintenance operation door, 7. Air exhaust muffler, 8. Exhaust Wind shutters, 9, control observation window, 10, muffler, 11, box base, 12, control cabinet, 13, generator set, 14, internal combustion engine, 15, cooling fan, 16, cooling water tank.

Detailed ways

As shown in Figures 1, 2 and 3, the silent box device of the generator set of the utility model is applied on the medium-sized diesel generator set. The silent box device of the generator set includes: box body 1, air intake shutter 2, air intake muffler 3, internal combustion engine exhaust muffler 4, space sound absorbing body 5, maintenance operation door 6, exhaust muffler 7, exhaust shutter 8, Control observation window 9.

The box body 1 of this device is a container type, and the box body 1 adopts a composite sound insulation board, the outer surface is a steel plate, the inner surface is a non-metallic perforated plate, and rock wool is filled inside as a sound-absorbing material. The length, width and height of the cabinet are 5760mm, 2620mm and 2200mm respectively. The exhaust muffler 7 is located at the tail of the box, and fills the tail of the whole box. The length, width and height are 2000mm, 2620mm, and 2200mm respectively. The exhaust louver 2 is located at the tail of the box body 1 and seals the tail port of the box body, with a width of 2620mm and a height of 2200mm. The space sound absorber 5 is located between the cooling water tank and the exhaust muffler 7, parallel to the exhaust muffler 7, embedded in the base 11 groove, both sides are 300mm away from the inner wall of the box, and the top is 300mm away from the box ceiling. The two air inlet mufflers 3 are respectively located on both sides of the front of the box body, symmetrically placed, each with a length of 400mm, one side is close to the air inlet louver 2 of the box body, and the other side is 100mm away from the control cabinet. Internal-combustion engine exhaust muffler 4 is installed on the muffler that the generator set exhaust pipe carries. The two maintenance operation doors 6 are respectively located on both sides of the middle part of the box body, next to the air intake shutters 2 . The control observation window 9 is located at the front end of the box body. The control observation window 9 is a small control door with a double-layer glass. The function of the control door is to facilitate the operation of the control cabinet. The double-layer glass is for convenience. The staff checks the operating status of the unit at any time.

Both the air inlet muffler 3 and the exhaust muffler 7 are multi-channel folded-plate resistive mufflers, in which the thickness of the muffler 10 is 80-100mm, the channel width is 120-150mm, and each muffler is composed of three layers of partitions , the two sides are non-metallic perforated plates, the middle is a metal plate, and the air layer is filled with porous sound-absorbing materials, and the sound absorption coefficient is 0.68;

The surface material of the space sound-absorbing body 5 is a metal perforated plate, and the sound-absorbing material made of a porous material with non-metallic sound-absorbing fibers is installed inside, and the sound absorption coefficient is 0.68.

The internal combustion engine exhaust muffler 4 is to add a resistance muffler to form a two-stage expansion type (resistance) muffler on the basis of the built-in muffler of the generator set, and the expansion coefficient m=9.

The maintenance operation door 6 is a double-layer door, which not only ensures the sound insulation effect but also facilitates equipment maintenance;

In order to ensure the air intake of the generator set and facilitate installation, two air inlet mufflers 3 are used, which are symmetrically placed on both sides of the control cabinet and the generator set. In order to reduce the air intake resistance, the air intake muffler adopts the insert type arrangement. The air inlet muffler 3 adopts a folded-plate resistive muffler, which uses the sound energy to be converted into heat energy due to friction when the sound wave propagates in the sound-absorbing material, and the noise cannot pass directly through the muffler channel due to the existence of the corner. Thereby effectively improving the noise reduction effect and achieving the purpose of noise reduction. In addition, an air intake louver 2 is installed at the outlet of the air intake muffler 3 to prevent rainwater from entering, and effectively protect it.

This example has been made into a finished product, and its noise can be reduced below 75dB through the test of the finished product.

The utility model adopts different control measures aiming at the noise characteristics of different positions, and has reached the requirement standard of the national environment. It has little impact on the surrounding environment and can be widely used in places with high environmental protection conditions.

Claims (8)

1, the quiet case apparatus of generator set is characterized in that: this device mainly includes casing (1), air intake silencing apparatus (3), exhaust silencer for internal-combustion engine (4), exhaust port silencing apparatus (7); Wherein, the whole generating unit is arranged on the inside of casing (1), and air intake silencing apparatus (3) is positioned at the front portion of casing (1), has two, lays respectively at the both sides of generator (12) and control cabinet (11), by base support, and the top of the adjacent casing in upper edge (1); Exhaust port silencing apparatus (7) can closely be filled in the afterbody of casing (1), and its sectional shape and cabinet wall sectional shape adapt; Be provided with suspended absorber (5) between exhaust port silencing apparatus (7) and cooling water tank (16), this sound absorbent is made by sound-absorbing material; Exhaust silencer for internal-combustion engine (4) is installed on the smoke-ejecting pipe of generator set, is positioned at the outside of casing (1), is provided with maintenance operation door (6) in the both sides of casing (1), the air intake venetian blind (2) of these adjacent both sides of operation door; Be provided with controlled observation window (9) in the position of the forefront of casing (1), corresponding control cabinet.

2, the quiet case apparatus of generator set according to claim 1 is characterized in that: the outer installment at exhaust port silencing apparatus (7) has air draft venetian blind (8), and the outer installment of air intake silencing apparatus (3) has air intake venetian blind (2).

3, according to claim 1 or the quiet case apparatus of the described generator set of claim 4, it is characterized in that: described air intake silencing apparatus (3), exhaust port silencing apparatus (7), suspended absorber (5) all are to be made of anechoic sheet (10), anechoic sheet (10) is made of the threepayer structure, biside plate is nonmetal perforated plate, the centre is a metal foil, be filled with sound-absorbing material between plate, sound-absorbing material is non-metallic fiber porous material or goods.

4, the quiet case apparatus of generator set according to claim 1 is characterized in that: what described casing (1) adopted is the structure of plate-air-plate, fills out in air layer and is placed with sound-absorbing porous material.

5, the quiet case apparatus of generator set according to claim 1 is characterized in that: described air intake venetian blind (2), air draft venetian blind (8) are the stormproof louvre window.

6, according to claim 1 or the quiet case apparatus of the described generator set of claim 6, it is characterized in that: the anechoic sheet (10) of described composition exhaust port silencing apparatus (7) is shaped as folded plate type, be in order to increase the length of sound absorption, can to avoid sound directly to spread out of on the other hand on the one hand.

7, the quiet case apparatus of generator set according to claim 1 is characterized in that: described exhaust port silencing apparatus (7) is a rectangular structure, wide and high wide and high in the cabinet wall cross section.

8, the quiet case apparatus of generator set according to claim 1 is characterized in that: described controlled observation window (9) is to have a double glazing on the little control gate, is used to the runnability of operating control cabinet and watching unit.