Noise reduction device of gas engine

Abstract

The utility model relates to the technical field of gas engines, in particular to a noise reduction device of a gas engine. The noise reduction device for the gas engine comprises a sound insulation cover, the sound insulation cover is formed by splicing a plurality of sound insulation steel plates, and wave-shaped sound absorption cotton is fixedly embedded in the inner plate walls of the sound insulation steel plates; through holes are formed in wave troughs of the wave-shaped sound-absorbing cotton, metal threaded rings are embedded in the through holes, sound-absorbing holes are formed in the positions, corresponding to the metal threaded rings, of the sound-insulating steel plate, and the sound-absorbing holes are filled with metal fine sand. And noise reduction components are mounted on the metal threaded rings. According to the noise reduction device for the gas engine, the small steel ball drives the large steel ball to slightly fluctuate on the metal fine sand through the middle connecting rod, so that the metal fine sand around the large steel ball dynamically and slightly moves and plastically deforms, vibration dynamic energy consumption can be efficiently dissipated, and the noise reduction device is particularly good at inhibiting low-frequency noise and solid noise spread by a structure; therefore, vibration energy is absorbed through plastic deformation of the metal fine sand, and transmission of noise is greatly reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of gas engines, in particular to a noise reduction device for gas engines. Background Art

[0002] Gas engines (such as gas generators and gas engines) generate significant noise pollution during operation, primarily from combustion, mechanical motion, and airflow pulsation. Excessive noise not only impacts the working environment but can also cause disturbances to operators and the surrounding area. Currently, common noise reduction measures rely on installing soundproofing enclosures around the gas engine. Traditional soundproofing enclosures typically utilize flat-plate sound-insulating steel panels lined with conventional sound-absorbing cotton (such as glass wool or rock wool). While this structure can absorb some high-frequency noise, it has significant shortcomings in practical applications. For example, the flat-plate sound-absorbing cotton has a weak scattering effect on sound waves, which easily reflects and overlaps within the enclosure. This results in poor absorption of specific frequency bands (particularly mid- and low-frequency frequencies), resulting in suboptimal overall noise reduction. Furthermore, existing soundproofing enclosures are prone to structural resonance under the broadband vibration excitation generated by the gas engine, radiating secondary noise and potentially amplifying certain frequencies.

[0003] Therefore, it is necessary to provide a new gas engine noise reduction device to solve the above technical problems. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides a gas engine noise reduction device.

[0005] The gas engine noise reduction device provided by the utility model includes a soundproof cover, which is composed of a plurality of soundproof steel plates, and the inner wall of each soundproof steel plate is fixedly embedded with a corrugated sound-absorbing cotton;

[0006] The trough of the corrugated sound-absorbing cotton is provided with a through hole, and a metal threaded ring is fixedly embedded in the through hole. A sound-absorbing hole is provided on the sound-insulating steel plate corresponding to each metal threaded ring, and the sound-absorbing hole is filled with metal fine sand.

[0007] Each of the metal threaded rings is equipped with a sound-reducing component, and the sound-reducing component includes an insertion column, an inner cylindrical surface of the insertion column is equipped with an elastically connected pressing disk, and a hinged middle link rod is inserted in the insertion column, one end of the middle link rod passes through the pressing disk and is fixedly installed with a large steel ball, and the other end of the middle link rod is fixedly installed with a small steel ball.

[0008] Preferably, a spherical cavity is provided in the insertion column, a hinge ball is fixedly sleeved on the rod section of the middle link rod located in the spherical cavity, and the hinge ball is rotatably connected to the spherical cavity.

[0009] Preferably, an elastic rubber disc is fixedly embedded in the through hole opened in the middle of the pressing disc, and the middle link passes through the through cavity opened in the center of the elastic rubber disc and is fixedly connected to the through cavity.

[0010] Preferably, a spring is installed on the inner cylindrical surface of the insertion column, and the other end of the spring is fixedly connected to the pressing disk.

[0011] Preferably, a threaded portion is provided on the insertion column, and the threaded portion matches the metal threaded ring.

[0012] Preferably, the insertion column is threadedly fixedly connected to the metal threaded ring through a threaded portion, and the large steel ball is inserted into the metal fine sand filled in the sound insulation steel plate.

[0013] Compared with related technologies, the gas engine noise reduction device provided by the present invention has the following beneficial effects:

[0014] When the noise generated by the gas engine in the soundproof cover hits the small steel ball during operation, the small steel ball drives the large steel ball to slightly fluctuate in the metal sand through the middle connecting rod, causing the metal sand around the large steel ball to dynamically micro-move and plastically deform, which can efficiently dissipate the vibration kinetic energy and is particularly good at suppressing low-frequency noise and solid noise transmitted by the structure. Therefore, the vibration energy is absorbed by the plastic deformation of the metal sand, which greatly reduces the propagation of noise. The pressing plate presses the metal sand tightly under the action of the spring, and cooperates with the fixation of the inserted column to effectively compact the metal sand in the sound-absorbing hole to prevent it from settling or hardening under long-term vibration, thereby ensuring the durability and stability of the damping effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A schematic structural diagram of a preferred embodiment of the gas engine noise reduction device provided by the utility model;

[0016] Figure 2 for Figure 1 Schematic diagram of the inner panel structure of the sound insulation steel plate shown;

[0017] Figure 3 for Figure 2 Schematic diagram of the cross-sectional structure of the sound insulation steel plate shown;

[0018] Figure 4 for Figure 3 Schematic diagram of the cross-sectional structure of the sound reduction component shown.

[0019] Numbers in the figure: 100, sound insulation cover; 1, sound insulation steel plate; 1a, sound-absorbing hole; 2, corrugated sound-absorbing cotton; 2a, metal threaded ring; 3, sound reduction component; 31, insertion column; 31a, spherical cavity; 311, threaded part; 32, pressing disk; 321, elastic rubber disk; 33, center link; 331, hinged ball; 34, small steel ball; 35, large steel ball; 36, spring; 4, metal fine sand. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0021] The specific implementation of the present invention is described in detail below with reference to specific embodiments.

[0022] See also Figures 1 to 4 An embodiment of the present invention provides a gas engine noise reduction device, which includes a sound insulation cover 100, corrugated sound-absorbing cotton 2, a sound reduction component 3 and metal fine sand 4.

[0023] In the embodiments of the present invention, please refer to Figures 1 to 4 The soundproof cover 100 is composed of several soundproof steel plates 1, and the inner wall of each soundproof steel plate 1 is fixedly embedded with a corrugated sound-absorbing cotton 2. The soundproof cover 100 is placed on the gas engine, and the corrugated sound-absorbing cotton 2 is used to reduce noise. Since the sound-absorbing cotton has a wavy structure, when the sound wave hits the surface of the corrugated sound-absorbing cotton 2, it will be scattered (or diffused) to many different directions, effectively dispersing the reflected sound energy, avoiding the energy concentration in a specific direction or area, making the reflected sound more evenly distributed, and reducing the obvious echo.

[0024] In the embodiments of the present invention, please refer to Figures 1 to 4 The trough of the corrugated sound-absorbing cotton 2 is provided with a through hole, and a metal threaded ring 2a is fixedly embedded in the through hole. Each metal threaded ring 2a corresponds to a sound-absorbing hole 1a on the sound-insulating steel plate 1, and the sound-absorbing hole 1a is filled with metal fine sand 4;

[0025] A sound reduction component 3 is installed on each metal threaded ring 2a, and the sound reduction component 3 includes an insertion column 31, and the inner cylindrical surface of the insertion column 31 is installed with an elastically connected pressing disk 32, specifically, a spring 36 is fixedly installed on the inner cylindrical surface of the insertion column 31, and the other end of the spring 36 is fixedly connected to the pressing disk 32; a hinged middle link 33 is inserted in the insertion column 31, specifically, a spherical cavity 31a is opened in the insertion column 31, and the middle link 33 is located on the rod section of the spherical cavity 31a and is fixedly sleeved with a hinge The receiving ball 331 is connected with the hinged ball 331 in rotation with the spherical cavity 31a; one end of the middle link 33 passes through the pressing disk 32 and is fixedly installed with a large steel ball 35, and the other end of the middle link 33 is fixedly installed with a small steel ball 34. A threaded portion 311 is provided on the insertion column 31, and the threaded portion 311 matches the metal threaded ring 2a. The insertion column 31 is threadedly fixed with the metal threaded ring 2a through the threaded portion 311, and the large steel ball 35 is inserted into the metal fine sand 4 filled in the sound insulation steel plate 1.

[0026] It should be noted that: the insertion column 31 is inserted into the metal threaded ring 2a and screwed, so that the large steel ball 35 is inserted into the metal sand 4, and the small steel ball 34 is moved to make the middle link 33 in a balanced state. At this time, the pressing plate 32 is inserted into the sound-absorbing hole 1a and abuts against the metal sand 4, which can not only compact the metal sand 4 but also prevent leakage of the metal sand 4.

[0027] When the noise generated by the gas engine in the soundproof cover 100 during operation hits the small steel ball 34, the small steel ball 34 drives the large steel ball 35 to slightly fluctuate in the metal sand 4 through the middle connecting rod 33, causing the metal sand 4 around the large steel ball 35 to dynamically micro-move and plastically deform, which can efficiently dissipate the vibration kinetic energy and is particularly good at suppressing low-frequency noise and structure-borne solid noise. Therefore, the plastic deformation of the metal sand 4 absorbs vibration energy and greatly reduces the spread of noise.

[0028] It should also be noted that the lever structure of the small steel ball 34 / large steel ball 35, the deformation of the elastic rubber disc 321, the expansion and contraction of the spring 36, and the fluidized motion of the metal sand 4 together constitute a multi-stage, dynamic damping system that responds to broadband vibrations and has a richer energy dissipation mechanism.

[0029] Among them, the pressing plate 32 presses the metal sand 4 under the action of the spring 36, and cooperates with the fixation of the inserted column 31 to effectively compact the metal sand 4 in the sound-absorbing hole 1a, preventing it from settling or hardening under long-term vibration, thereby ensuring the durability and stability of the damping effect.

[0030] It is worth noting that the size of the small steel ball 34 in the present application is two-thirds of the large steel ball 35 , forming a lever effect, amplifying the force, and making the movement of the large steel ball 35 in the metal sand 4 more significant.

[0031] In order to prevent the spring 36 from being twisted when the insertion column 31 is rotated, a rotating ring for rotational connection is installed at the insertion end of the insertion column 31, and the connection end of the spring 36 is fixedly connected to the rotating ring.

[0032] In this embodiment, the through cavity in the insertion column 31 for passing the middle link 33 has a hole diameter larger than the rod diameter of the middle link 33, so that the middle link 33 can deflect at a certain angle to adapt to the vibration direction.

[0033] Furthermore, an elastic rubber disc 321 is fixedly embedded in the through hole opened in the middle of the pressing disc 32, and the middle link rod 33 passes through the through cavity opened in the center of the elastic rubber disc 321 and is fixedly connected to the through cavity. The elastic rubber disc 321 is arranged on the pressing disc 32 so that the elastic rubber disc 321 can be dynamically adjusted when the middle link rod 33 is tilted, thereby avoiding the hidden danger of the middle link rod 33 being unable to deflect.

[0034] In this solution, the sound reduction components 3 are independent, and the metal sand 4 in each sound absorbing hole 1a can be flexibly replaced, so the staff can conduct inspections to replace damaged sound reduction components 3 or metal sand 4.

[0035] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the description and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A gas engine noise reduction device, comprising a soundproof cover (100), wherein the soundproof cover (100) is composed of a plurality of soundproof steel plates (1), and the inner wall of each soundproof steel plate (1) is fixedly embedded with a corrugated sound-absorbing cotton (2), characterized in that: The trough of the wave-shaped sound-absorbing cotton (2) is provided with a through hole, and a metal threaded ring (2a) is fixedly embedded in the through hole. A sound-absorbing hole (1a) is provided on the sound-insulating steel plate (1) corresponding to each metal threaded ring (2a), and the sound-absorbing hole (1a) is filled with metal fine sand (4); Each of the metal threaded rings (2a) is equipped with a sound-reducing component (3), and the sound-reducing component (3) includes an insertion column (31), an inner cylindrical surface of the insertion column (31) is equipped with an elastically connected pressing disk (32), and a hinged middle link (33) is inserted in the insertion column (31), one end of the middle link (33) passes through the pressing disk (32) and is fixedly equipped with a large steel ball (35), and the other end of the middle link (33) is fixedly equipped with a small steel ball (34).

2. The gas engine noise reduction device according to claim 1, characterized in that: A spherical cavity (31a) is provided in the insertion column (31), and a hinge ball (331) is fixedly sleeved on the rod section of the middle link rod (33) located in the spherical cavity (31a), and the hinge ball (331) is rotatably connected to the spherical cavity (31a).

3. The gas engine noise reduction device according to claim 2, characterized in that: An elastic rubber disc (321) is fixedly embedded in a through hole opened in the middle of the pressing disc (32), and the middle link (33) passes through a through cavity opened in the center of the elastic rubber disc (321) and is fixedly connected to the through cavity.

4. The gas engine noise reduction device according to claim 1, characterized in that: A spring (36) is installed on the inner cylindrical surface of the insertion column (31), and the other end of the spring (36) is fixedly connected to the pressing disk (32).

5. The gas engine noise reduction device according to claim 1, characterized in that: A threaded portion (311) is provided on the insertion column (31), and the threaded portion (311) matches the metal threaded ring (2a).

6. The gas engine noise reduction device according to claim 5, characterized in that: The insertion column (31) is threadedly fixedly connected to the metal threaded ring (2a) via the threaded portion (311), and the large steel ball (35) is inserted into the metal fine sand (4) filled in the sound insulation steel plate (1).

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