Military communication vehicle with high noise reduction performance

Abstract

The invention discloses a military communication vehicle with high noise reduction performance, which comprises a chassis and a cabin body, the chassis is used for supporting and bearing the whole vehicle, the cabin body is fixed on the chassis, the cabin body comprises an outer layer mask and an inner layer mask, and an anti-vibration noise reduction layer is arranged between the outer layer mask and the inner layer mask; silencing walls are further arranged on the inner side of the cabin body and comprise a front silencing partition wall and a middle silencing partition wall. According to the military communication vehicle with the high noise reduction performance, an all-dimensional three-dimensional noise reduction system is formed through the comprehensive design of the cabin body, the noise reduction wall and the ventilation noise reduction body, the problem that composite noise of vehicle-mounted equipment is difficult to control is effectively solved, the noise index can be controlled to be 60 decibels or below, the comfort level of workers is remarkably improved, and the service life of the workers is prolonged. And meanwhile, normal heat dissipation and operation of the equipment are considered, and the applicability and reliability are greatly improved.

Description

Technical Field

[0001] The invention relates to the field of communication vehicles, and in particular to a military communication vehicle with high noise reduction performance. Background Art

[0002] As an important equipment for emergency rescue and command and dispatch, the command and communication vehicle needs to be equipped with a generator, an air-conditioning outdoor unit, and various communication equipment. At present, there are many noise reduction technical solutions on the market. For example, CN202322238753.3 discloses a micro-pressure cabin noise reduction and sound insulation structure, which adopts basic sound insulation and noise reduction measures. However, this solution mainly targets the cabin itself and fails to effectively solve the noise problem of the on-board equipment.

[0003] In actual applications, these devices will generate a lot of noise and vibration, which is mainly reflected in the following aspects: the generator is an on-board power supply device, and its noise sources include gas dynamic noise, exhaust noise, fuel combustion noise, mechanical noise of piston movement, airflow noise and electromagnetic noise of cooling fan operation, etc.; the vibration and noise generated by the air conditioner outdoor unit during operation are transmitted and radiated through the vehicle structure, which will also cause noise interference in the car; in addition, various communication equipment and cabinets in the car will also generate certain noise when working. The superposition of these equipment noises will seriously affect the work efficiency and physical and mental health of the staff, and is not conducive to the smooth development of emergency rescue command work.

[0004] Although some noise reduction solutions have been developed in the prior art, for example, some communication vehicles mainly adopt a single noise reduction measure of installing a soundproof wall in the cabin. Even after the noise reduction treatment, the noise index is still above 65dB(A) (excluding the chassis startup noise). This single noise reduction measure has the following technical problems: the noise reduction effect is not ideal, and it is difficult to meet the low noise requirements of the working environment of personnel; there is a lack of a systematic and comprehensive noise reduction treatment solution for the whole vehicle, and the coordinated treatment of various noise sources from the perspective of the whole vehicle is not considered; the noise treatment of special parts such as air-conditioning outlets is not perfect, and these parts often generate additional noise; there is a lack of theoretical analysis and evaluation methods after the comprehensive noise reduction of the whole vehicle, and it is impossible to accurately predict and evaluate the noise reduction effect.

[0005] Therefore, it is urgent to develop a communication vehicle that can achieve better noise reduction effect and establish a corresponding noise reduction evaluation system to meet the growing demand for a low-noise working environment. Summary of the invention

[0006] The technical problem solved by the present invention is: to solve the above-mentioned technical problems, to provide a military high-noise reduction performance communication vehicle with multiple noise reduction structures, to solve the problem of complex noise generated by generators, air-conditioning outdoor units and communication equipment in existing command and communication vehicles, to achieve coordinated noise reduction of multiple noise sources, and at the same time to ensure normal heat dissipation and operation of the equipment, to provide a good working environment for the staff.

[0007] The technical solution adopted by the present invention to solve its technical problem is:

[0008] A military communication vehicle with high noise reduction performance comprises a chassis and a cabin. The chassis is used to support and carry the entire vehicle. The cabin is fixed on the chassis. The cabin comprises an outer panel and an inner panel. An anti-vibration and noise reduction layer is arranged between the outer panel and the inner panel. A soundproofing wall is also arranged on the inner side of the cabin, including a front soundproofing partition wall and a middle soundproofing partition wall.

[0009] Preferably, the outer panel is an aluminum alloy plate, and the inner panel is a zinc-iron alloy plate.

[0010] Preferably, the anti-vibration and noise reduction layer is a sprayed 3M water-based chassis armor provided on the inner and outer sides of the cabin.

[0011] Preferably, the outer layer of each soundproofing wall is composed of a metal plate and an aluminum plate, sound insulation material is filled between the metal plate and the aluminum plate, the inner layer is an aluminum plate, and rock wool is filled between the outer layer and the inner layer.

[0012] Preferably, the metal plate is a 1 mm thick galvanized steel plate, the aluminum plate includes a 2 mm thick aluminum plate and a 1.2 mm thick aluminum plate, and the thickness of the rock wool is 80 mm.

[0013] Preferably, the corners of the sound-absorbing wall are sealed using sealing materials.

[0014] Preferably, it also includes a ventilation noise reduction body, which is arranged at the air outlet position of the air conditioner in the cabin.

[0015] Preferably, the ventilation and noise reduction body is a rectangular parallelepiped structure with one surface recessed inwardly, and is provided with a plurality of partitions arranged vertically and arranged obliquely with respect to each other inside, and the ventilation and noise reduction body is sealedly connected to the cabin.

[0016] Beneficial effects of the present invention:

[0017] 1. By adopting a double-layer mask structure in the cabin, the outer layer uses an aluminum alloy plate with good high-frequency noise reduction performance, and the inner layer uses a zinc-iron alloy plate with good low-frequency noise reduction performance, and 3M water-based chassis armor is coated between the outer and inner layers to form an anti-vibration and noise reduction coating; combined with the front sound-absorbing partition wall and the middle sound-absorbing partition wall installed on the inside of the cabin, as well as the ventilation noise reduction body set at the air outlet of the air conditioner in the cabin, a full-dimensional three-dimensional noise reduction system is formed, which effectively solves the problem that the composite noise of the vehicle-mounted equipment is difficult to control, and significantly improves the comprehensive noise reduction effect of the communication vehicle. The noise index can be controlled below 60 decibels, providing a more comfortable and quiet working environment for the staff.

[0018] 2. By using a composite structure of galvanized steel plate and aluminum plate in the outer layer of the soundproofing wall, an aluminum plate in the inner layer, filling sound-absorbing and heat-insulating rock wool between the outer and inner layers, and sealing the corners; and arranging a plurality of inclined partitions in the ventilation and noise reduction body, using the principles of sound absorption and expansion to change the airflow path, and sealingly connecting with the cabin body, a high-efficiency noise barrier and noise reduction system is formed. The present invention effectively solves the problem of superposition interference of various noises generated during the operation of various types of equipment, takes into account the normal heat dissipation and operation of the equipment while reducing noise, makes noise control more comprehensive and thorough, and greatly improves applicability and reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a diagram showing the structural position of the internal sound-absorbing wall and 3M water-based chassis armor of the military high noise reduction performance communication vehicle in Example 1;

[0020] Figure 2 This is a schematic diagram of the structure of the sound-absorbing wall in Example 1;

[0021] Figure 3 This is a schematic diagram of the structure of the air outlet silencer of the air conditioner in Example 1.

[0022] The above-mentioned figure markings: 1. Cabin; 2. Front sound-absorbing partition wall; 3. Middle sound-absorbing partition wall; 4. 3M water-based chassis armor; 5. 2mm aluminum plate; 6. 1mm galvanized steel plate; 7. Sound insulation material; 8. 1.2mm aluminum plate; 9. Rock wool; 10. Sealant; a. Air inlet direction; b. Sound-absorbing air outlet direction. DETAILED DESCRIPTION

[0023] The present invention is further described below in conjunction with the accompanying drawings and examples, but these specific implementation schemes do not limit the protection scope of the present invention in any way.

[0024] Example 1

[0025] like Figure 1-3 As shown, a military high noise reduction performance communication vehicle includes a chassis, a cabin 1, a soundproofing wall, a ventilation noise reduction body and other structures. The communication vehicle can control the noise index of personnel working positions to no more than 60dB (A) when the chassis and all equipment are working at the same time.

[0026] The cabin 1 adopts a double-layer panel structure, the outer panel is made of aluminum alloy plate with good high-frequency noise reduction performance, and the inner panel is made of zinc-iron alloy plate with good low-frequency noise reduction performance. 3M water-based chassis armor 4 is sprayed on the inside and outside of the cabin 1 to form an anti-vibration and noise reduction layer.

[0027] The soundproof wall includes a front soundproof partition wall 2 and a middle soundproof partition wall 3 installed on the inner side of the cabin 1, which are fixedly connected to the inner panel. The outer layer of each soundproof wall is composed of a 1mm galvanized steel plate 6 and a 2mm aluminum plate 5. The space between the galvanized steel plate and the aluminum plate is filled with sound insulation material 7. The inner layer is a 1.2mm aluminum plate 8. The space between the outer layer and the inner layer is filled with 80mm thick rock wool 9 for sound absorption and heat insulation. The corners of the soundproof wall are sealed with sound insulation sealants or sealants to ensure the tightness of the structure and prevent sound leakage. The soundproof wall uses a combination of multiple layers of materials to form an effective soundproof barrier, reduce the transmission of noise, and effectively block the noise generated by various types of equipment during operation.

[0028] The ventilation noise reduction body is an air-conditioning outlet silencer, which is arranged at the air outlet position of the air conditioner in the cabin (not shown in the figure, it is the air outlet position of a general air conditioner). The air-conditioning outlet silencer is a rectangular parallelepiped structure with one side concave inward, and is provided with a plurality of vertically arranged partitions inside. These partitions are arranged and distributed obliquely with respect to each other, which helps to absorb sound, guide and expand the airflow. By using the principles of sound absorption and expansion, the air outlet of the air conditioner is the air inlet direction a, and the two sides are the silencer air outlet direction b, and the airflow path and direction are changed, thereby effectively reducing noise. A sealed connection is adopted between the ventilation noise reduction body and the cabin body 1, specifically a sound insulation sealant or sealant is adopted. In this embodiment, sealant is adopted to prevent noise from leaking from the connection.

[0029] The military high noise reduction performance communication vehicle provided by the present invention can control the noise index of the personnel working position to no more than 60dB (A) when the chassis and all equipment are working at the same time. Because in the current field of military communication vehicles, when the vehicle performs tasks in a complex environment, the noise generated by the chassis startup and equipment operation is generally high, and the noise index is mostly above 70 decibels, and some models even exceed 80 decibels. Working in such a high-noise environment for a long time will not only damage the hearing health of the staff, but also cause problems such as fatigue and decreased attention, thereby affecting the completion quality and work efficiency of the communication task. Therefore, this indicator in the present invention has reached the highest level in the field of noise reduction of military communication vehicles, which is 10-20 decibels lower than the conventional level of the industry and is at the international advanced level. The noise intensity of 60dB (A) is equivalent to the sound of a normal conversation, and long-term work will not cause hearing fatigue, which can ensure the health of the staff. At the same time, the ultra-low noise working environment can also improve the comfort and concentration of personnel, ensuring the high-quality completion of communication tasks in complex electromagnetic environments and extreme conditions.

[0030] The theoretical analysis and evaluation method after comprehensive noise reduction of the whole vehicle is as follows:

[0031] According to the superposition calculation formula, it is concluded that the superposition calculation of different sound pressure noises is carried out according to the following rules:

[0032]

[0033] According to the analysis, the noise reduction capacity of the cabin 1 soundproofing partition wall is 25dB (A). The noise values ​​of each device after the noise reduction of cabin 1 (unit: dB (A)) are shown in the following table:

[0034]

[0035] Evaluation conclusion: After the vehicle has undergone noise reduction design, the superimposed calculation result of the cabin noise value is 58dB(A).

[0036] The working principle and method of the above-mentioned military high noise reduction performance communication vehicle are:

[0037] The first step is that when the generator, air conditioner and various communication equipment in the communication vehicle start working, these devices will generate noise. The outer aluminum alloy mask first isolates the high-frequency noise, while the inner zinc-iron alloy mask mainly handles the low-frequency noise.

[0038] In the second step, the 3M water-based chassis armor 4 sprayed on the inside and outside of the cabin 1 plays a vibration-proof and noise-reducing role, reducing the noise generated by the equipment vibration transmitted through the cabin 1 structure.

[0039] In the third step, the sound-absorbing wall installed on the inner side of the cabin 1 further absorbs and isolates the noise penetrating the double-layer mask, forming a multiple noise reduction barrier.

[0040] The fourth step is that the ventilation noise reduction body reduces the noise generated by ventilation through its special structure while ensuring the heat dissipation of the equipment, thus preventing noise from leaking from the vents.

[0041] The various components of the vehicle's comprehensive noise reduction system work together to achieve effective control of multiple noise sources such as generators, air-conditioning outdoor units and communication equipment, ensuring that the noise index in the working cabin is no more than 60dB(A). At the same time, it ensures the normal operating temperature of various equipment and creates a good working environment for staff.

[0042] Since the cabin 1 adopts a double-layer masking structure and combines the use of sound-absorbing walls and ventilation noise reduction bodies, the communication vehicle can simultaneously cope with noises of different frequencies. Compared with the noise reduction solution of the prior art that only uses sound-absorbing walls, the noise reduction effect is improved by more than 5dB(A).

[0043] The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of protection of the present invention. Any innovative improvement or replacement based on the present invention shall fall within the scope of the claims of the present invention. At the same time, the various parameters, materials, and processes mentioned in the above embodiments are not exclusive. Without departing from the technical essence of the present invention, a person of ordinary skill in the art may make various alternatives, and these alternatives shall also be deemed to fall within the scope of protection of the present invention.

Claims

1. A military high noise reduction performance communication vehicle, comprising a chassis and a cabin, wherein the chassis is used to support and carry the entire vehicle, the cabin is fixed on the chassis, and the cabin comprises an outer panel and an inner panel, and is characterized in that: A vibration-proof and noise-reducing layer is provided between the outer panel and the inner panel; a sound-absorbing wall is also provided on the inner side of the cabin, including a front sound-absorbing partition wall and a middle sound-absorbing partition wall.

2. The military high noise reduction performance communication vehicle according to claim 1 is characterized in that: The outer panel is an aluminum alloy plate, and the inner panel is a zinc-iron alloy plate.

3. The military high noise reduction performance communication vehicle according to claim 1 is characterized in that: The anti-vibration and noise reduction layer is a sprayed 3M water-based chassis armor arranged on the inner and outer sides of the cabin.

4. The military high noise reduction performance communication vehicle according to claim 1 is characterized in that: The outer layer of each soundproofing wall is composed of metal plates and aluminum plates, sound insulation materials are filled between the metal plates and the aluminum plates, the inner layer is an aluminum plate, and rock wool is filled between the outer layer and the inner layer.

5. The military high noise reduction performance communication vehicle according to claim 4 is characterized in that: The metal plate is a 1 mm thick galvanized steel plate, the aluminum plate includes a 2 mm thick aluminum plate and a 1.2 mm thick aluminum plate, and the thickness of the rock wool is 80 mm.

6. The military high noise reduction performance communication vehicle according to claim 4 is characterized in that: The corner positions of the sound-absorbing wall are sealed using sealing materials.

7. The military high noise reduction performance communication vehicle according to claim 1 is characterized in that: It also includes a ventilation and noise reduction body, which is arranged at the air outlet position of the air conditioner in the cabin.

8. The military high noise reduction performance communication vehicle according to claim 7 is characterized in that: The ventilation and noise reduction body is a rectangular parallelepiped structure that is concave inwards, and is provided with a plurality of partitions that are vertically arranged and arranged obliquely with respect to each other. The ventilation and noise reduction body is sealedly connected to the cabin.

Images