A wear test noise reduction device

Abstract

The utility model is suitable for material detection test equipment noise reduction field provides a kind of abrasion test noise reduction device, including soundproof cover main part and soundproof door, the soundproof cover main part inside is equipped with buffer mounting structure;The sidewall of soundproof cover main part is equipped with ventilation system, the ventilation system includes mute axial fan, air intake and outlet, the air intake and outlet inside are equipped with spiral noise reduction passage;In the utility model, through the soundproof cover main part of three layers composite structure realizes basic sound insulation, combines buffer mounting structure attenuation vibration transmission, again through the spiral noise reduction passage of ventilation system and strengthens the noise reduction effect, simultaneously optimizes the opening and closing structure of soundproof door and promotes the operation convenience, can effectively reduce the noise pollution in abrasion test process.

Description

Technical Field

[0001] This utility model belongs to the field of noise reduction in material testing equipment, and particularly relates to a noise reduction device for abrasion testing. Background Technology

[0002] Abrasion testing machines are commonly used testing equipment in the field of materials testing. They evaluate the abrasion resistance of materials by simulating the wear conditions during actual use. During the test, the collision and friction between the machine's rollers and the test blocks and steel balls, as well as the vibration generated by the machine's operation, produce a large amount of noise, typically reaching 90-110 decibels, which seriously exceeds the noise limits for industrial sites. Prolonged work in such a high-noise environment can cause irreversible damage to the operator's hearing system and also disrupt the quietness of the surrounding environment.

[0003] Existing noise reduction measures for abrasion testing have many shortcomings: traditional soundproof enclosures only use single or double-layer board structures, which have limited sound insulation effects and do not design buffer structures for equipment vibration transmission, resulting in incomplete vibration noise control; ventilation systems often sacrifice noise reduction performance to ensure heat dissipation, with air inlets and outlets becoming the main channels for noise leakage, and conventional sound-absorbing structures cannot balance ventilation volume and noise reduction effect; some noise reduction devices are complicated to install, causing inconvenience to the maintenance and operation of the testing machine; Therefore, a wear test noise reduction device is needed to solve the above problems. Utility Model Content

[0004] The purpose of this utility model embodiment is to provide a wear test noise reduction device to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: The soundproof enclosure body and the soundproof door are provided. The soundproof enclosure body has a buffer installation structure inside. The side wall of the soundproof enclosure body is provided with a ventilation system, which includes a silent axial flow fan, an air inlet and an air outlet. The air inlet and the air outlet are provided with a spiral silencing channel inside.

[0006] A further technical solution involves a three-layer composite structure for the soundproof enclosure, consisting of an outer steel plate layer, a middle layer of sound-insulating cotton, and an inner damping sound-insulating layer, from the outside in. The middle layer of sound-insulating cotton connects the outer steel plate layer and the inner damping sound-insulating layer. The outer steel plate layer provides structural support for the entire device, and its high strength effectively blocks the direct transmission of high-frequency noise. The middle layer of sound-insulating cotton is made of porous material, which can convert the acoustic energy of mid-to-low frequency noise into heat energy through air friction and viscous resistance, thus achieving noise absorption. The inner damping sound-insulating layer has high damping characteristics, which can suppress secondary noise generated by the vibration of the soundproof enclosure. The three layers work together to form a highly efficient sound barrier.

[0007] A further technical solution involves a buffer installation structure comprising several damping springs, several telescopic rods, and several dampers. These damping springs, telescopic rods, and dampers are evenly distributed. The top ends of each damping spring, telescopic rod, and damper are connected to the lower surface of the testing machine body, while the bottom ends are connected to the damping and sound-insulating inner layer. Each damping spring is sleeved on the outside of the telescopic rods. The damping springs absorb the vertical vibration energy generated by the testing machine body through elastic deformation. The telescopic rods guide the damping springs, preventing lateral displacement during vibration and ensuring the stability of the damping effect. The dampers dissipate vibration energy through damping force, preventing resonance. These three components work together to attenuate vibration transmission and reduce vibration noise.

[0008] A further technical solution involves providing spiral sound-absorbing cotton on the inner wall of the spiral silencing channel, and louvered guide vanes at both the inlet and outlet of the spiral silencing channel. The spiral silencing channel extends the propagation path of airflow and noise, causing noise to be reflected multiple times and absorbed within the channel. The spiral sound-absorbing cotton is arranged parallel to the airflow direction, which increases the sound-absorbing area and reduces resistance to airflow, enabling efficient absorption of noise at different frequencies. The louvered guide vanes guide the airflow smoothly into the channel while blocking the straight-line propagation of noise, further enhancing the noise reduction effect.

[0009] A further technical solution involves connecting the silent axial flow fan within the damping and sound-insulating inner layer. Both the air inlet and outlet are connected through the side wall of the soundproof enclosure body, with the height of the air inlet lower than that of the outlet. The silent axial flow fan provides ventilation power while maintaining low noise, reducing additional noise pollution. The design of the air inlet being lower than the outlet utilizes the principle of rising hot air to form natural convection, enhancing heat dissipation efficiency and ensuring that the main body of the testing machine operates at a suitable temperature.

[0010] A further technical solution includes a limiting groove inside the soundproof enclosure body, and a door panel slidably connected within the limiting groove. A limiting rod and a return spring are connected within the limiting groove. The return spring is sleeved on the limiting rod, which is slidably connected inside the door panel. The top end of the return spring is connected to the bottom of the door panel. Two locking bolts are threaded onto the front of the outer layer of the steel plate. The limiting groove and the limiting rod together restrict the movement trajectory of the door panel, ensuring smooth opening and closing. The return spring provides elastic pressure when the door panel is closed, enhancing the sealing between the door panel and the soundproof enclosure body. The locking bolts can further secure the door panel after it is closed, preventing noise leakage due to loosening of the door panel during testing.

[0011] Compared with the prior art, the beneficial effects of this utility model are: This utility model, through a three-layer composite soundproof cover body, achieves basic sound insulation from three dimensions: blocking, absorption and suppression, effectively reducing airborne noise; This utility model employs a combination design of shock-absorbing springs, telescopic rods, and dampers in its buffer installation structure, which significantly attenuates vibration transmission and reduces the generation and propagation of vibration noise. This utility model's ventilation system, through the synergistic effect of a spiral-shaped noise-absorbing channel and spiral-shaped sound-absorbing cotton, effectively prevents noise leakage through the ventilation opening while ensuring ventilation and heat dissipation, thus balancing noise reduction and heat dissipation performance. This utility model features a sliding structure for the soundproof door, combined with a return spring and locking bolts. This design facilitates operation, ensures a tight seal when closed, and enhances the practicality of the device and the stability of its noise reduction effect.

[0012] To more clearly illustrate the structural features and effects of this utility model, the following detailed description of this utility model is provided in conjunction with the accompanying drawings and specific embodiments. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural diagram of the present invention from the front view; Figure 2 This is a structural schematic diagram of the present invention in frontal three-dimensional cross-section; Figure 3 This is a schematic diagram of a partial frontal three-dimensional cross-section of the present invention; Figure 4 This is a side view of the three-dimensional cross-section of the present invention.

[0014] In the diagram: 1. Soundproof enclosure main body; 11. Outer steel plate; 12. Middle layer of sound insulation cotton; 13. Inner layer of damping sound insulation; 14. Limiting groove; 2. Buffer installation structure; 21. Damper; 22. Telescopic rod; 23. Vibration damping spring; 3. Main body of testing machine; 4. Ventilation system; 41. Silent axial flow fan; 42. Air inlet; 43. Air outlet; 44. Spiral silencing channel; 45. Spiral sound-absorbing cotton; 5. Soundproof door; 51. Door panel; 52. Limiting rod; 53. Return spring; 6. Locking bolt. Detailed Implementation

[0015] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0016] The specific implementation of this utility model will be described in detail below with reference to specific embodiments.

[0017] like Figures 1-4As shown, this utility model embodiment provides a noise reduction device for abrasion testing, including a soundproof cover body 1 and a soundproof door 5; The main body of the soundproof enclosure 1 adopts a three-layer composite structure, consisting of a 3mm thick Q235 steel plate outer layer 11, a 50mm thick centrifugal glass wool sound insulation cotton middle layer 12, and a 2mm thick butyl rubber damping sound insulation inner layer 13, from the outside to the inside. The buffer installation structure 2 includes four shock-absorbing springs 23 with a diameter of 20mm, four stainless steel telescopic rods 22 and four hydraulic dampers 21, which are distributed in a rectangular shape at the four corners of the bottom of the main body 3 of the testing machine. The shock-absorbing springs 23 are sleeved on the outside of the telescopic rods 22. The ventilation system 4 includes an SF-120 silent axial flow fan 41, an air inlet 42 and an air outlet 43 with a diameter of 150mm, an internal 300mm long spiral sound-absorbing channel 44, and 10mm thick spiral sound-absorbing cotton 45 pasted on the inner wall. The door panel 51 of the soundproof door 5 is a 56mm thick three-layer composite structure, which is slidably connected by the limiting rod 52 and the return spring 53 in the limiting groove 14 and fixed with the M8 locking bolt 6; In this embodiment, the three-layer composite soundproof enclosure body 1 achieves a high-frequency noise blocking rate of 85% and a mid-to-low frequency noise absorption rate of 70%; the buffer installation structure 2 reduces vibration transmission by more than 60%; the ventilation system 4 reduces noise leakage at the ventilation openings by 40% and controls the temperature inside the enclosure to below 40°C; the soundproof door 5 has a door gap noise leakage of ≤5dB, and the overall noise can be controlled to below 70 decibels, achieving a synergistic effect of basic sound insulation, vibration attenuation, and low-noise ventilation. Example

[0018] The difference between this embodiment and embodiment 1 is that the parameters of the buffer installation structure 2 and the ventilation system 4 are optimized; The buffer installation structure 2 is changed to 6 shock-absorbing springs 23, 6 telescopic rods 22 and 6 dampers 21, which are distributed in a regular hexagonal pattern at the bottom of the main body 3 of the testing machine; The length of the spiral silencing channel 44 is increased to 400mm, the spiral diameter gradually changes from 150mm to 80mm, and the thickness of the inner wall sound-absorbing cotton is increased to 15mm; In this embodiment, the hexagonal distributed buffer installation structure 2 increases the horizontal and vertical vibration attenuation rate to 70%, which is suitable for the complex vibration scenarios of large testing machines; the lengthened sound-absorbing channel and thickened sound-absorbing cotton increase the noise absorption efficiency of the ventilation opening by 15%, and the overall noise can be controlled below 65 decibels, further optimizing the vibration control and noise reduction effect. Example

[0019] The difference between this embodiment and Embodiment 1 is that the sound insulation material is upgraded and the structure is strengthened. The main body of the soundproof enclosure 1 is replaced with a 5mm thick Q345 steel plate outer layer 11, a 70mm thick rock wool sound insulation cotton middle layer 12, and a 3mm thick polymer damping inner layer 13. The buffer installation structure 2 adopts a 30mm diameter high elasticity shock absorption spring 23, a hydraulic telescopic rod 22, and a magnetorheological damper 21; The ventilation system 4 is replaced with an HTF-2 high-efficiency fan 41, the air inlet 42 and the air outlet 43 are 200mm in diameter, the spiral sound-absorbing channel 44 is 500mm long, and multi-layer sound-absorbing partitions are added with a sound-absorbing cotton thickness of 20mm. In this embodiment, the upgraded sound insulation material achieves a high-frequency noise blocking rate of 90% and a mid-to-low-frequency noise absorption rate of 80%; the magnetorheological damper 21 reduces resonance amplitude by 80%; the ventilation system 4 increases airflow to 1200 m³ / h, reduces noise leakage by 60%, maintains an internal temperature of ≤35℃, and controls overall noise below 60 decibels, meeting the requirements of high noise reduction scenarios.

[0020] Working principle and usage process of this invention: Noise control is achieved through a three-tiered noise reduction system consisting of vibration control, basic sound insulation, and ventilation noise reduction. First, the buffer installation structure 2, through the synergistic action of the shock-absorbing spring 23, the telescopic rod 22 and the damper 21, attenuates the vibration transmission of the main body 3 of the testing machine from the source, thereby reducing the generation of vibration noise; Secondly, the three-layer composite structure of the soundproof enclosure body 1 reduces airborne noise through blocking, absorption and suppression. Finally, the spiral silencing channel 44 and spiral sound-absorbing cotton 45 of the ventilation system 4 work together to allow the airflow entering the channel to collide and rub against the noise multiple times, converting sound energy into heat energy for consumption. At the same time, the louvered baffle guides the airflow and blocks the straight-line propagation of noise. While ensuring ventilation and heat dissipation, it prevents noise from leaking out through the ventilation opening. The three layers work together to significantly reduce the noise of the wear test.

[0021] The circuits, electronic components, and modules involved are all existing technologies, which can be fully implemented by those skilled in the art, and need not be elaborated upon. The content protected by this utility model does not involve any improvement to the software and methods.

[0022] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A noise reduction device for abrasion testing, comprising a soundproof cover body (1) and a soundproof door (5), characterized in that: The soundproof cover body (1) is provided with a buffer installation structure (2) inside; the soundproof cover body (1) is provided with a ventilation system (4) on its side wall. The ventilation system (4) includes a silent axial flow fan (41), an air inlet (42) and an air outlet (43). The air inlet (42) and the air outlet (43) are both provided with a spiral silencing channel (44).

2. The wear test noise reduction device according to claim 1, characterized in that: The soundproof cover body (1) adopts a three-layer composite structure, which consists of an outer steel plate (11), a middle layer of sound insulation cotton (12), and a damping sound insulation inner layer (13) from the outside to the inside. The middle layer of sound insulation cotton (12) is connected between the outer steel plate (11) and the damping sound insulation inner layer (13).

3. The wear test noise reduction device according to claim 1, characterized in that: The buffer installation structure (2) includes several damping springs (23), several telescopic rods (22) and several dampers (21). The damping springs (23), several telescopic rods (22) and several dampers (21) are evenly distributed. The top ends of the damping springs (23), several telescopic rods (22) and several dampers (21) are connected to the lower surface of the main body (3) of the testing machine. The bottom ends of the damping springs (23), several telescopic rods (22) and several dampers (21) are connected to the damping and sound insulation inner layer (13). The damping springs (23) are all sleeved on the outside of the telescopic rods (22).

4. The wear test noise reduction device according to claim 1, characterized in that: The inner wall of the spiral silencing channel (44) is provided with spiral sound-absorbing cotton (45), and louvered guide plates are provided at the inlet and outlet of the spiral silencing channel (44).

5. The wear test noise reduction device according to claim 1, characterized in that: The silent axial flow fan (41) is connected inside the damping and sound insulation inner layer (13). The air inlet (42) and the air outlet (43) are both connected through the side wall of the sound insulation cover body (1). The height of the air inlet (42) is lower than the height of the air outlet (43).

6. The wear test noise reduction device according to claim 2, characterized in that: The soundproof cover body (1) has a limiting groove (14) inside. The soundproof door (5) includes a door panel (51). The door panel (51) is slidably connected in the limiting groove (14). The limiting groove (14) is connected to a limiting rod (52) and a return spring (53). The return spring (53) is sleeved on the outside of the limiting rod (52). The limiting rod (52) is slidably connected in the door panel (51). The top of the return spring (53) is connected to the bottom of the door panel (51). The front of the outer layer (11) of the steel plate is threaded with two locking bolts (6).

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