Noise reduction mechanism of agricultural vehicle generator

Abstract

The utility model discloses an agricultural vehicle generator noise reduction mechanism which comprises a protection module and a noise reduction module. The protection module comprises a machine shell, a machine core installed in the machine shell, a first wind scooper, a second wind scooper, a machine cover attached to the top of the machine shell, two bolts vertically penetrating through the machine cover and a movable door plate connected with the machine shell in a buckled mode, wherein the first wind scooper and the second wind scooper are connected with the two side walls in the machine shell respectively. And the bottom ends of the two bolts are respectively connected with the wind scooper I and the wind scooper II. According to the utility model, the first microphone inside the casing picks up noise signals generated by the movement, the second microphone picks up noise signals outside the casing, the two noise signals are transmitted to the control box, the control box generates noise which is equal to the two noise signals in amplitude but opposite to the two noise signals in polarity, after being mixed, the two noise is transmitted to the loudspeaker, and then the loudspeaker generates noise. And then sound waves abut against one another, so that the noise reduction effect is effectively ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of generator noise reduction, in particular to a generator noise reduction mechanism for an agricultural vehicle. Background Art

[0002] Generator is a mechanical device that converts other forms of energy into electrical energy. It is driven by a turbine, steam turbine, diesel engine or other power machinery, and converts the energy generated by water flow, air flow, fuel combustion or nuclear fission into mechanical energy and transmits it to the generator, which then converts it into electrical energy. Generators are widely used in industrial and agricultural production, national defense, science and technology, and daily life.

[0003] Application No. CN201921164638.3 discloses a generator noise reduction protective cover, including a base, a shock absorber, a support plate, a generator, a fixed rod, a pull rod, a cover plate, a sound-absorbing sponge block, an axial flow fan and an exhaust pipe. The generator is placed between the top baffles of the support plate, and the bottom limit block of the fixed rod is passed through the circular through hole on the top surface of the support plate, and then slid inward through the square notch to fix the two sides and the top of the generator. When the fixed rod slides inward to the innermost end, the pull rod is inserted, and the two ends of the pull rod are fixed to the block by pins, so that the fixed rod is fixed, so that the generator can be firmly fixed on the support plate, the vibration generated by the generator during operation is weakened by the shock absorber, and the noise generated during operation is absorbed by the foam aluminum layer and the sound-absorbing sponge block, reducing the noise generated, and the generator is very convenient to fix and disassemble in the protective cover, and the noise reduction effect is good. When the application is used specifically, it is impossible to fundamentally reduce the noise transmitted by the "corrugation" form, so its noise reduction effect is limited. Utility Model Content

[0004] The utility model aims to solve one of the technical problems existing in the prior art or related technology.

[0005] To this end, the technical solution adopted in this utility model is:

[0006] A noise reduction mechanism for a generator of an agricultural vehicle comprises a protection module and a noise reduction module, wherein the protection module comprises a casing, a movement installed inside the casing, an air scoop 1 and an air scoop 2 respectively connected to the inner side walls of the casing, a cover fitted to the top of the casing, two bolts vertically penetrating the cover, and a movable door plate buckled with the casing, wherein the bottom ends of the two bolts are respectively connected to the air scoop 1 and the air scoop 2, and the noise reduction module comprises a first microphone and a control box installed inside the air scoop 2, a second microphone installed on one side of the casing, and a speaker installed inside the control box, wherein the first microphone, the second microphone, and the speaker are all electrically connected to the control box.

[0007] By adopting the above technical solution, the first microphone located inside the casing picks up the noise signal generated by the movement, and the second microphone picks up the noise signal outside the casing. The two noise signals are transmitted to the control box, and the control box generates noise with equal amplitude but opposite polarity to the two noise signals. After the two noises are mixed, they are transmitted to the speaker, and then the speaker generates sound waves, and then the sound waves offset each other, effectively ensuring the noise reduction effect.

[0008] In a preferred example, the utility model can be further configured as follows: two light steel keels are installed at the bottom of the casing, and the two light steel keels are respectively close to two sides of the casing.

[0009] In a preferred example, the utility model can be further configured as follows: the machine cover and the movable door panel are made of the same material as the casing, and the casing is made of sound insulation material.

[0010] In a preferred example, the utility model can be further configured as follows: a plurality of heat dissipation windows are embedded in the casing, and the plurality of heat dissipation windows are respectively located at the front, rear and outer side of the air guide cover of the casing.

[0011] In a preferred example, the utility model can be further configured as follows: the second microphone is located on the top of the heat dissipation window close to the air guide cover, and the first microphone and the second microphone are of the same model.

[0012] By adopting the above technical solution, the beneficial effects achieved by the utility model are as follows:

[0013] 1. In the utility model, the first microphone located inside the casing picks up the noise signal generated by the movement, and the second microphone picks up the noise signal outside the casing. The two noise signals are transmitted to the control box, and the control box generates noise with the same amplitude but opposite polarity as the two noise signals. After the two noises are mixed, they are transmitted to the speaker, and then the speaker generates sound waves, and then the sound waves offset each other, which effectively ensures the noise reduction effect.

[0014] 2. In the utility model, the noise generated when the movement is working fills the interior of the casing, and then the casing, the cover and the movable door panel cooperate to block the sound, reduce the decibel of sound propagation, and improve the noise reduction effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional diagram of the overall structure of the utility model;

[0016] Figure 2 This is a schematic diagram of the protection module of the utility model;

[0017] Figure 3 This is a top view of the casing of the utility model;

[0018] Figure 4 This is a schematic diagram of the noise reduction module of the utility model.

[0019] Reference numerals:

[0020] 100, protection module; 110, housing; 120, movement; 130, air guide cover 1; 140, air guide cover 2; 150, machine cover; 160, bolt; 170, movable door panel;

[0021] 200, noise reduction module; 210, first microphone; 220, second microphone; 230, control box; 240, speaker;

[0022] 300. Heat dissipation window. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model is further described in detail below in combination with specific implementation methods and with reference to the accompanying drawings. It should be noted that the embodiments of the utility model and the features in the embodiments can be combined with each other without conflict.

[0024] It should be understood that these descriptions are exemplary only and are not intended to limit the scope of the present invention.

[0025] A noise reduction mechanism for a generator for an agricultural vehicle provided by some embodiments of the utility model will be described below in conjunction with the accompanying drawings.

[0026] Embodiment 1:

[0027] Combination Figure 1-4 As shown, the utility model provides a noise reduction mechanism for a generator for an agricultural vehicle, comprising a protection module 100 and a noise reduction module 200, wherein the protection module 100 comprises a housing 110, a movement 120 installed inside the housing 110, an air guide cover 130 and an air guide cover 2 140 respectively connected to the two side walls inside the housing 110, a cover 150 fitted to the top of the housing 110, two bolts 160 vertically penetrating the cover 150, and a movable door plate 170 buckled with the housing 110, wherein the bottom ends of the two bolts 160 are respectively connected to the air guide cover 130 and the air guide cover 2 140;

[0028] The noise reduction module 200 includes a first microphone 210 and a control box 230 installed inside the wind guide cover 140, a second microphone 220 installed on one side of the housing 110, and a speaker 240 installed inside the control box 230. The first microphone 210, the second microphone 220, and the speaker 240 are all electrically connected to the control box 230.

[0029] Specifically, the cover 150 and the movable door panel 170 are made of the same material as the housing 110. The housing 110 is made of sound insulation material, which effectively blocks the propagation of noise.

[0030] Furthermore, the second microphone 220 is located on the top of the heat dissipation window 300 near the wind guide cover 130, and the first microphone 210 and the second microphone 220 are of the same type. With this structural design, the device will be more convenient to manufacture.

[0031] Embodiment 2:

[0032] Combination Figure 1 , 2 and Figure 4 As shown, based on the first embodiment, two light steel keels are installed at the bottom of the casing 110, and the two light steel keels are respectively close to the two sides of the casing 110. The light steel keels can be set up to lift the casing 110 and effectively prevent the bottom of the casing 110 from accumulating heat.

[0033] Embodiment three:

[0034] Combination Figure 1 , 2 and Figure 4 As shown, in the above embodiment, the casing 110 is embedded with a plurality of heat dissipation windows 300, which are respectively located at the front and rear of the casing 110 and the outside of the air guide cover 130. The heat dissipation windows 300 can improve the heat dissipation effect inside the casing 110.

[0035] The working principle and use process of the utility model are as follows: when the device is put into actual use, the noise generated by the movement 120 when it is working fills the interior of the casing 110, and then the casing 110, the cover 150, and the movable door panel 170 cooperate to block the sound and reduce the decibel of sound propagation. Then the first microphone 210 located inside the casing 110 picks up the noise signal generated by the movement 120, and the second microphone 220 picks up the noise signal outside the casing 110. The two noise signals are transmitted to the control box 230, and the control box 230 generates noise with equal amplitude but opposite polarity to the two noise signals. After the two noises are mixed, they are transmitted to the speaker 240, and then the speaker 240 generates, and then the sound waves offset the sound waves, effectively ensuring the noise reduction effect.

[0036] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A noise reduction mechanism for a generator of an agricultural vehicle, characterized in that: include: A protection module (100), the protection module (100) comprising a housing (110), a movement (120) installed inside the housing (110), a first air guide cover (130) and a second air guide cover (140) respectively connected to two side walls inside the housing (110), a cover (150) affixed to the top of the housing (110), two bolts (160) vertically penetrating the cover (150), and a movable door panel (170) buckled with the housing (110), the bottom ends of the two bolts (160) being respectively connected to the first air guide cover (130) and the second air guide cover (140); A noise reduction module (200), the noise reduction module (200) comprising a first microphone (210) and a control box (230) installed inside the second air guide cover (140), a second microphone (220) installed on one side of the housing (110), and a speaker (240) installed inside the control box (230), wherein the first microphone (210), the second microphone (220), and the speaker (240) are all electrically connected to the control box (230).

2. The noise reduction mechanism of a generator for an agricultural vehicle according to claim 1, characterized in that: Two light steel keels are installed at the bottom of the casing (110), and the two light steel keels are respectively close to two sides of the casing (110).

3. The noise reduction mechanism of a generator for an agricultural vehicle according to claim 1, characterized in that: The machine cover (150) and the movable door panel (170) are made of the same material as the machine casing (110), and the machine casing (110) is made of sound insulation material.

4. The noise reduction mechanism for a generator for an agricultural vehicle according to claim 1, characterized in that: The housing (110) is embedded with a plurality of heat dissipation windows (300), and the plurality of heat dissipation windows (300) are respectively located at the front and rear of the housing (110) and the outside of the first air guide cover (130).

5. The noise reduction mechanism of the generator for agricultural vehicles according to claim 4, characterized in that: The second microphone (220) is located at the top of the heat dissipation window (300) close to the first air guide cover (130), and the first microphone (210) and the second microphone (220) are of the same model.

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