CN112377289A

CN112377289A - Reduce supply vehicle noise cancelling structure of infrared characteristic

Info

Publication number: CN112377289A
Application number: CN202011279203.0A
Authority: CN
Inventors: 王浩; 房元斌; 何兵; 唐嘉麒; 赵炜
Original assignee: Shanghai Junhai Special Electromechanical Equipment Technology Development Co ltd; Shanghai Electrical Apparatus Research Institute Group Co Ltd
Current assignee: Shanghai Junhai Special Electromechanical Equipment Technology Development Co ltd; Shanghai Electrical Apparatus Research Institute Group Co Ltd
Priority date: 2020-11-16
Filing date: 2020-11-16
Publication date: 2021-02-19
Anticipated expiration: 2040-11-16
Also published as: CN112377289B

Abstract

The invention discloses a power supply vehicle noise elimination structure for reducing infrared characteristics, which is characterized by comprising a smoke inlet pipe, wherein one end of the smoke inlet pipe is connected with an exhaust port of a diesel engine; one side of the ascending pipe group is provided with a cooling water tank for cooling the diesel engine, and one side of the cooling water tank close to the diesel engine is provided with a diesel engine fan. The invention restrains the main noise sources (namely exhaust noise and mechanical noise) of the liquid-cooled diesel engine, and simultaneously cools the waste gas discharged by the liquid-cooled diesel engine, thereby reducing the infrared characteristic.

Description

Reduce supply vehicle noise cancelling structure of infrared characteristic

Technical Field

The invention relates to a power supply vehicle noise elimination structure, in particular to a power supply vehicle noise elimination structure capable of reducing infrared characteristics, and belongs to the field of mechanical engineering.

Background

The function of a certain power supply vehicle is to provide working power supply for a certain weapon system under the field battle condition along with the maneuvering of the certain weapon system. The working mode is that the liquid cooling diesel engine drives the synchronous generator to generate electricity, but the liquid cooling diesel engine can generate larger noise when in work, discomfort is brought to the operation officers and soldiers of the weapon system, the man-machine engineering is reduced, and meanwhile, the temperature of exhaust gas discharged by the liquid cooling diesel engine is higher, larger infrared characteristics are generated, and the tactical concealment is influenced.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: how to reduce noise when the power supply vehicle is operated and how to reduce infrared characteristics.

In order to solve the technical problem, the technical scheme of the invention provides a power supply vehicle noise elimination structure for reducing infrared characteristics, which is characterized by comprising a smoke inlet pipe, wherein one end of the smoke inlet pipe is connected with an exhaust port of a diesel engine; one side of the ascending pipe group is provided with a cooling water tank for cooling the diesel engine, and one side of the cooling water tank close to the diesel engine is provided with a diesel engine fan.

Preferably, the front silencer is of a microporous plate structure; be equipped with micropore board and baffle in the leading silencer, micropore board and baffle separate leading silencer for a plurality of parts, are equipped with a plurality of micropores on the micropore board.

Preferably, at least one layer of microporous plate is arranged in the front silencer, and each layer of microporous plate is provided with a plurality of partition plates connected with the inner wall of the front silencer.

Preferably, the exhaust silencer comprises a porous aluminum plate and a sound-absorbing material layer, the porous aluminum plate forms a plurality of exhaust ducts, and the sound-absorbing material layer is arranged between any two adjacent exhaust ducts; one end of the exhaust duct is arranged on one side of the ascending pipe group, and the other end of the exhaust duct is communicated with the atmosphere.

Preferably, the exhaust duct is of an inverted V-shaped structure.

Preferably, the outer wall of the exhaust silencer is provided with a shutter.

Preferably, the expansion cavity structure comprises a first expansion cavity, the other end of the smoke inlet pipe is communicated with the first expansion cavity, and the other end of the first expansion cavity is communicated with the second expansion cavity.

Preferably, the expansion cavity structure comprises at least one descending pipe group and a first expansion cavity corresponding to the descending pipe group, all the descending pipe groups are connected with the first expansion cavity in series at intervals, the other end of the smoke inlet pipe is communicated with the first expansion cavity at the head end, and the second expansion cavity is communicated with the descending pipe group at the tail end.

Preferably, the descending pipe group and the ascending pipe group are both composed of a plurality of through pipe arrays and are arranged in the same cavity, and the cavity is connected with the cooling water tank through a transition joint; each through pipe is sleeved with a plurality of radiating fins.

Preferably, the walls of the first expansion cavity, the second expansion cavity and the third expansion cavity are coated with heat insulation material layers.

According to the power supply vehicle noise elimination structure for reducing the infrared characteristic, the main noise sources (namely exhaust noise and mechanical noise) of the liquid-cooled diesel engine are all restrained, and meanwhile, the waste gas discharged by the liquid-cooled diesel engine is cooled, so that the infrared characteristic is reduced.

Drawings

Fig. 1 is a schematic view of a supply vehicle muffling structure for reducing infrared characteristics.

Detailed Description

In order to make the invention more comprehensible, preferred embodiments are described in detail below with reference to the accompanying drawings.

Example 1

The invention provides a power supply vehicle noise elimination structure for reducing infrared characteristics, which is composed of a front silencer 16, a first expansion cavity 18, a downlink pipe group 10, a second expansion cavity 7, an uplink pipe group 8, a third expansion cavity 19, a smoke outlet 1, an exhaust silencer 4 and a shutter 2, and is shown in figure 1. One end of the smoke inlet pipe 15 is connected with the exhaust port of the diesel engine, the outer side of the smoke inlet pipe 15 is provided with a front muffler 16, the other end of the smoke inlet pipe 15 is communicated with a first expansion cavity 18, the first expansion cavity 18 is communicated with a second expansion cavity 7 through a descending pipe group 10, the second expansion cavity 7 is communicated with a third expansion cavity 19 through an ascending pipe group 8, the third expansion cavity 19 is provided with a smoke outlet 1 communicated with the third expansion cavity, and an exhaust muffler 4 is arranged between the second expansion cavity 7 and the third expansion cavity 19; a cooling water tank 13 for cooling the diesel engine is arranged at one side of the descending pipe group 10 and the ascending pipe group 8, and a diesel engine fan 12 is arranged at one side of the cooling water tank 13 close to the diesel engine.

The pre-silencer 16 adopts a micropore plate structure, in the embodiment, a double-layer micropore plate 17 is arranged in the pre-silencer 16, namely micropores are densely distributed on the pipe wall, a partition plate 14 is also arranged in the middle of the pre-silencer 16, and the micropore plate 17 and the partition plate 14 divide the pre-silencer 16 into a plurality of parts; the descending pipe group 10 and the ascending pipe group 8 are both composed of a plurality of through pipe arrays and communicated with a first expansion cavity 18, a second expansion cavity 7 and a third expansion cavity 19, and a plurality of radiating fins 9 are sleeved on each through pipe; the walls of the first expansion chamber 18, the second expansion chamber 7 and the third expansion chamber 19 are coated with a layer 20 of heat insulating material; the outer wall of the third expansion cavity 19 is provided with a smoke outlet 1; the exhaust silencer 4 consists of porous aluminum plates 6 and sound-absorbing material layers 5, the porous aluminum plates 6 form a plurality of inverted V-shaped exhaust ducts 3, and the sound-absorbing materials are filled among the porous aluminum plates 6 to form the sound-absorbing material layers 5; the sound absorption material layer 5 is arranged between any two adjacent exhaust ducts 3. The outer wall of the exhaust silencer 4 is provided with a shutter 2. One end of the exhaust duct 3 is arranged at one side of the ascending pipe group 8, and the other end of the exhaust duct 3 is communicated with the atmosphere.

The noise suppression principle of the invention is as follows:

1. exhaust noise: when the power supply vehicle works, the liquid cooling diesel engine drives the synchronous generator to generate electricity, exhaust gas discharged by the diesel engine firstly enters the preposed silencer 16 through the smoke inlet pipe 15, the liquid cooling diesel engine belongs to an impedance composite silencer, exhaust noise is primarily eliminated through a double-layer micropore plate 17 and a partition plate 14 in the liquid cooling diesel engine, then the exhaust gas enters the first expansion cavity 18, the downlink pipe group 10, the second expansion cavity 7, the uplink pipe group 8 and the third expansion cavity 19, the uplink pipe group 8 and the downlink pipe group 10 are both formed by a plurality of through pipe arrays, the pipe diameters of the through pipes are thin, the pipe lengths of the through pipes are long, the exhaust noise is further attenuated, the three expansion cavities are equivalent to three resistance expansion chambers, the exhaust noise is attenuated again, and finally the exhaust gas is discharged out.

2. Mechanical noise: mechanical noise (including the noise of airing exhaust of diesel engine fan) when power supply car diesel generator group moved, when 4 time exhaust mufflers, can be in the porous aluminum plate 6 of the exhaust duct 3 of type of falling V between repeated reflection and by the sound absorbing material layer 5 absorption in the porous aluminum plate 6, spread the outer mechanical noise of power supply car and attenuate greatly.

The principle of infrared characteristic inhibition of the invention is as follows:

the cooling air flow that the diesel engine fan 12 that utilizes the cooling water tank 13 of diesel engine produced, the cooling air flow that diesel engine fan 12 produced at first passes through cooling water tank 13 of liquid cooling diesel engine, the rethread transition joint 11 blows down nest of tubes 10 and the 8 arrays of upstream nest of tubes, the cover has a large amount of fin 9 on the siphunculus of nest of tubes, the heat of diesel engine waste gas is taken away by the cooling air flow in the siphunculus, the temperature greatly reduced, after the diesel engine waste gas gets into the expansion chamber, because the gas expands, the temperature further reduces, at last diesel engine waste gas passes through exhaust port 1 and discharges the power supply car external, during the diesel engine waste gas sneaks into the cooling air flow of exhaust silencer 4 exhaust downwards, the temperature reduces once.

Example 2

In this embodiment, the other end of the smoke inlet pipe 15 is connected to the first expansion chamber 18, and the other end of the first expansion chamber 18 is connected to the second expansion chamber 7.

The rest is the same as in example 1.

Example 3

In this embodiment, the muffler structure of the power supply vehicle includes at least 2 descending tube sets 10 and corresponding first expansion cavities 18, all the descending tube sets 10 are connected in series with the first expansion cavities 18 at intervals, the other end of the smoke inlet tube 15 is communicated with the first expansion cavity 18 at the head end, and the second expansion cavity 7 is communicated with the descending tube set 10 at the tail end.

The rest is the same as in example 1.

Claims

1. A silencing structure of a power supply vehicle for reducing infrared characteristics is characterized by comprising a smoke inlet pipe (15) with one end connected with an exhaust port of a diesel engine, wherein a front silencer (16) is arranged on the outer side of the smoke inlet pipe (15), the other end of the smoke inlet pipe (15) is communicated with a second expansion cavity (7) through an expansion cavity structure, the second expansion cavity (7) is communicated with a third expansion cavity (19) through an ascending pipe group (8), a smoke outlet (1) communicated with the third expansion cavity (19) is formed in the third expansion cavity (19), and an exhaust silencer (4) is arranged between the second expansion cavity (7) and the third expansion cavity (19); one side of the ascending pipe group (8) is provided with a cooling water tank (13) for cooling the diesel engine, and one side of the cooling water tank (13) close to the diesel engine is provided with a diesel engine fan (12).

2. The structure of claim 1, wherein the pre-muffler (16) is of a micro-perforated plate structure; a micropore plate (17) and a partition plate (14) are arranged in the front silencer (16), the front silencer (16) is divided into a plurality of parts by the micropore plate (17) and the partition plate (14), and a plurality of micropores are formed in the micropore plate (17).

3. The structure of claim 2, wherein the front muffler (16) is provided with at least one layer of micro-porous plate (17), and each layer of micro-porous plate (17) is provided with a plurality of partition plates (14) connected with the inner wall of the front muffler (16).

4. The muffling structure of the power supply vehicle for reducing the infrared characteristics of the claim 1, wherein the exhaust muffler (4) comprises a porous aluminum plate (6) and a sound-absorbing material layer (5), the porous aluminum plate (6) forms a plurality of exhaust ducts (3), and the sound-absorbing material layer (5) is arranged between any two adjacent exhaust ducts (3); one end of the exhaust duct (3) is arranged at one side of the ascending pipe group (8), and the other end of the exhaust duct (3) is communicated with the atmosphere.

5. The muffling structure of the power supply vehicle for reducing the infrared characteristics of claim 4, wherein the exhaust duct (3) is of an inverted V-shaped structure.

6. The structure of claim 4, wherein the outer wall of the exhaust muffler (4) is provided with a shutter (2).

7. The muffling structure of the power supply vehicle for reducing the infrared characteristic of claim 1, wherein the expansion cavity structure comprises a first expansion cavity (18), the other end of the smoke inlet pipe (15) is communicated with the first expansion cavity (18), and the other end of the first expansion cavity (18) is communicated with the second expansion cavity (7).

8. The structure of reducing the noise of the power supply vehicle with the infrared characteristics is characterized in that the structure of the expansion cavities comprises at least one descending tube group (10) and a first expansion cavity (18) corresponding to the descending tube group, all the descending tube groups (10) are connected with the first expansion cavity (18) at intervals in series, the other end of the smoke inlet pipe (15) is communicated with the first expansion cavity (18) at the head end, and the second expansion cavity (7) is communicated with the descending tube group (10) at the tail end.

9. The structure of claim 8, wherein the down tube group (10) and the up tube group (8) are both composed of a plurality of tube arrays and are arranged in the same cavity, and the cavity is connected with the cooling water tank (13) through a transition joint (11); each through pipe is sleeved with a plurality of radiating fins (9).

10. A supply vehicle muffler structure for reducing the infrared characteristic as claimed in claim 7 or 8, wherein the walls of the first expansion chamber (18), the second expansion chamber (7) and the third expansion chamber (19) are coated with a layer of heat insulation material (20).