Vibration and noise reduction structure of gearbox

Abstract

The invention discloses a gearbox vibration and noise reduction structure, and relates to the technical field of gearboxes. The problem that an existing gearbox is large in noise in the operation process is solved. The box comprises a box body, a vibration reduction layer and a noise reduction layer are sequentially arranged on the inner wall of the box body, the vibration reduction layer is located on the side close to the box body, the vibration reduction layer is attached to the inner wall of the box body, the noise reduction layer is located on the side away from the box body, the vibration reduction layer is bent along with the box body to achieve vibration reduction, and the noise reduction layer absorbs and obstructs noise to achieve noise reduction. When the vibration reduction layer bends and vibrates along with the box body, the tension and compression deformation of the vibration reduction layer converts vibration energy into macromolecular chain or chain segment movement, mechanical energy is converted into heat energy through intermolecular internal friction to be consumed, meanwhile, generated noise can be absorbed by the noise reduction layer, noise diffusion is further prevented, and the noise reduction effect is improved. Therefore, the high-frequency vibration noise of the box body is suppressed, and the noise is controlled.

Description

Technical Field

[0001] The invention relates to the technical field of gear boxes, and in particular to a vibration and noise reduction structure of a gear box. Background Art

[0002] Gearbox is an important component widely used in mechanical transmission. When a pair of gears mesh, there will inevitably be errors in tooth pitch, tooth shape, etc., which will cause meshing impact during operation and produce noise corresponding to the gear meshing frequency. Friction noise will also occur due to relative sliding between tooth surfaces. These noises will affect the working environment, staff and equipment performance, so it is very necessary to reduce gear noise.

[0003] In the prior art, vibration transmission is generally suppressed by arranging vibration isolators, adding ribs, etc., but the use of vibration isolators will take up more space, thereby increasing the size of the gearbox and increasing the difficulty of adjustment with other connected equipment. In addition, the inspection and replacement of vibration isolators are very cumbersome. Although the method of adding ribs can suppress vibration, its control effect on gear noise is very limited, and there will still be a lot of noise.

[0004] In summary, the existing gearbox has the problem of high noise during operation. Summary of the invention

[0005] The purpose of the present invention is to solve the problem of high noise in the gearbox during operation, and further provide a gearbox vibration reduction and noise reduction structure.

[0006] The technical solution of the present invention is: a gear box vibration reduction and noise reduction structure, comprising: a box body, the inner wall of which is sequentially provided with a vibration reduction layer and a noise reduction layer, the vibration reduction layer is located on a side close to the box body, and the noise reduction layer is located on a side away from the box body;

[0007] The vibration-damping layer is bent and vibrated together with the box body to achieve vibration reduction, and the noise reduction layer achieves noise reduction by absorbing noise.

[0008] Furthermore, it also includes: a constraint layer, which is sandwiched between the vibration reduction layer and the noise reduction layer, and the constraint layer is used to absorb the vibration energy of the vibration reduction layer to enhance the vibration reduction effect.

[0009] Furthermore, the constraining layer is epoxy resin.

[0010] Furthermore, the epoxy resin is formed on the vibration reduction layer by a coating process.

[0011] Furthermore, it also includes: a protective layer installed on a side of the noise reduction layer away from the vibration reduction layer.

[0012] Furthermore, the protective layer is a steel plate.

[0013] Furthermore, it also includes: a plurality of bolts distributed in an array, one end of each bolt sequentially passes through the steel plate and the noise reduction layer and is fastened to the constraint layer.

[0014] Furthermore, the vibration damping layer is polyurethane.

[0015] Furthermore, the noise reduction layer is polyester fiber sound-absorbing cotton.

[0016] Compared with the prior art, the present invention has the following effects:

[0017] 1. The gearbox vibration and noise reduction structure provided by the present invention has a tensile and compressive deformation of the vibration-damping layer that converts the vibration energy into the movement of macromolecular chains or chain segments when the vibration-damping layer bends and vibrates together with the box body, and converts the mechanical energy into heat energy through the internal friction between molecules and consumes it. At the same time, the noise generated will be absorbed by the noise reduction layer, further preventing the spread of the noise, thereby suppressing the high-frequency vibration noise of the box body and controlling the noise.

[0018] 2. The gearbox vibration and noise reduction structure provided by the present invention has a shear deformation of the constraint layer that converts the vibration energy into heat energy and consumes it, thereby further absorbing the vibration energy. Under the joint action of the constraint layer and the vibration reduction layer, the vibration reduction effect is better.

[0019] 3. The gearbox vibration and noise reduction structure provided by the present invention has high strength and rigidity of epoxy resin, which can withstand greater pressure and impact, and has significant advantages in manufacturing structural parts and parts bearing heavy loads. In addition, the surface hardness of epoxy resin is high, and the wear resistance is excellent, and it is not easy to be worn, so it is suitable for application scenarios that need to maintain the surface integrity for a long time.

[0020] 4. The gearbox vibration and noise reduction structure provided by the present invention has a protective layer that can protect the constraint layer and the vibration reduction layer from being damaged, thereby ensuring the vibration reduction and noise reduction effects. At the same time, it can also support the constraint layer and the vibration reduction layer, so that the vibration reduction layer is tightly attached to the inner wall of the box body. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the gearbox vibration reduction and noise reduction structure of the present invention;

[0022] Figure 2 yes Figure 1 A partial enlarged view of .

[0023] In the figure: 1. Box body; 2. Vibration reduction layer; 3. Constraint layer; 4. Noise reduction layer; 5. Protective layer. DETAILED DESCRIPTION

[0024] Specific implementation method 1: Combination Figure 1 , Figure 2 To illustrate this embodiment, this embodiment includes a box body 1, and the inner wall of the box body 1 is sequentially provided with a vibration-damping layer 2 and a noise-reducing layer 4, the vibration-damping layer 2 is located on a side close to the box body 1, the vibration-damping layer 2 is attached to the inner wall of the box body 1, and the noise-reducing layer 4 is located on a side away from the box body 1, the vibration-damping layer 2 bends together with the box body 1 to achieve vibration reduction, and the noise-reducing layer 4 achieves noise reduction by absorbing and blocking noise.

[0025] In the gearbox vibration and noise reduction structure of this embodiment, when the vibration-damping layer 2 bends and vibrates together with the box body 1, the tensile and compressive deformation of the vibration-damping layer 2 converts the vibration energy into the movement of macromolecular chains or chain segments, and converts the mechanical energy into heat energy and consumes it through the internal friction between molecules. At the same time, the noise generated will be absorbed by the noise reduction layer 4, further preventing the spread of noise, thereby suppressing the high-frequency vibration noise of the box body 1 and controlling the noise.

[0026] Specific implementation method 2: Combination Figure 1 , Figure 2 To illustrate this embodiment, this embodiment also includes: a constraint layer 3, which is sandwiched between the vibration reduction layer 2 and the noise reduction layer 4. The constraint layer 3 is a damping structure, which is used to absorb the vibration energy of the vibration layer to enhance the vibration reduction effect. The vibration reduction layer 2 and the constraint layer 3 work together to reduce vibration. When the constraint layer 3 follows the bending vibration of the vibration reduction layer 2, the shear deformation of the constraint layer 3 converts the vibration energy into heat energy and consumes it, further absorbing the vibration energy. Under the joint action of the constraint layer 3 and the vibration reduction layer 2, the vibration reduction effect is better. Of course, the above description is not restrictive. As an alternative embodiment, the constraint layer 3 can also be omitted, and the vibration reduction effect can be improved by increasing the thickness of the vibration reduction layer 2. Other components and connection relationships are the same as those in the specific embodiment one.

[0027] Specific implementation method three: Combination Figure 1 , Figure 2 To explain this embodiment, the constraint layer 3 of this embodiment uses a high modulus two-component epoxy resin material. Epoxy resin has high strength and rigidity, can withstand greater pressure and impact, and has significant advantages in making structural parts and parts that bear heavy loads. In addition, epoxy resin has high surface hardness and excellent wear resistance. It is not easy to be worn and is suitable for application scenarios that require long-term surface integrity. Of course, the above description is not restrictive. As an alternative embodiment, the constraint layer 3 can also be rubber. Other components and connection relationships are the same as those of the second specific embodiment.

[0028] Specific implementation method four: Combination Figure 1 , Figure 2To illustrate this embodiment, the epoxy resin of this embodiment is formed on the vibration damping layer 2 by a coating process. During processing, the processing position can be accurately controlled, material waste can be avoided, and the molding effect is better. Of course, the above description is not restrictive. As an alternative embodiment, the epoxy resin can also be processed by spraying or other processes. Other components and connection relationships are the same as those of the specific embodiment three.

[0029] Specific implementation method five: Combination Figure 1 , Figure 2 This embodiment further includes: a protective layer 5, which is installed on the side of the noise reduction layer 4 away from the vibration reduction layer 2. The protective layer 5 can play a protective role to prevent the constraint layer 3 and the vibration reduction layer 2 from being damaged, thereby ensuring the vibration reduction effect and the noise reduction effect. The other components and connection relationships are the same as those of the second embodiment.

[0030] Specific implementation method six: Combination Figure 1 , Figure 2 To explain this embodiment, the protective layer 5 of this embodiment is a steel plate, which has a relatively high hardness and a relatively good protective effect. At the same time, it can also support the constraint layer 3 and the vibration reduction layer 2, so that the vibration reduction layer 2 is tightly attached to the inner wall of the box body 1. Of course, the above description is not restrictive. As an alternative embodiment, the protective layer 5 can also be an iron plate, etc. The other components and connection relationships are the same as those of the specific embodiment 5.

[0031] Specific implementation method seven: Combination Figure 1 , Figure 2 To explain this embodiment, this embodiment also includes: bolts, which are arranged in an array, one end of which passes through the steel plate, the noise reduction layer 4 and is fastened to the constraint layer 3 in sequence, and the bolts can connect the steel plate, the noise reduction layer 4 and the constraint layer 3 together to form a whole, and the bolts are detachable to facilitate subsequent maintenance. Of course, the above description is not restrictive. As an alternative embodiment, the bolts can also be omitted, and the connection can be made by bonding. Other components and connection relationships are the same as those of the specific embodiment six.

[0032] Specific implementation method eight: Combination Figure 1 , Figure 2 To explain this embodiment, the vibration-damping layer 2 of this embodiment is made of polyurethane material. Polyurethane has high strength, toughness and wear resistance, can meet the requirements of mechanical properties in various application scenarios, and has a good vibration absorption effect, thereby enhancing its vibration-damping effect. Of course, the above description is not restrictive. As an alternative embodiment, the vibration-damping layer can also be made of other materials such as butyl rubber. Other components and connection relationships are the same as any one of the specific embodiments one to seven.

[0033] Specific implementation method nine: Combination Figure 1, Figure 2 To explain this embodiment, the noise reduction layer 4 of this embodiment uses polyester fiber sound-absorbing cotton. The polyester fiber sound-absorbing cotton uses 100% polyester fiber that is hot-pressed with high technology and is formed in the shape of cocoon cotton. Its sound absorption coefficient can reach 0.94 within the noise range of 125 to 4000HZ, which can effectively absorb sound, reduce noise, and provide a quiet and comfortable environment. Of course, the above description is not restrictive. As an alternative embodiment, the noise reduction layer 4 can also use plywood, hard fiberboard, gypsum board, asbestos cement board, etc. The other components and connection relationships are the same as any one of the specific embodiments one to six.

[0034] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A gearbox vibration reduction and noise reduction structure, comprising: A box (1), characterized in that a vibration reduction layer (2) and a noise reduction layer (4) are sequentially arranged on the inner wall of the box (1), the vibration reduction layer (2) is located on a side close to the box (1), and the noise reduction layer (4) is located on a side away from the box (1); The vibration-damping layer (2) bends and vibrates together with the box body (1) to achieve vibration reduction, and the noise reduction layer (4) achieves noise reduction by absorbing noise.

2. A gearbox vibration reduction and noise reduction structure according to claim 1, characterized in that: Also includes: A constraint layer (3) is sandwiched between the vibration reduction layer (2) and the noise reduction layer (4), and the constraint layer (3) is used to absorb the vibration energy of the vibration reduction layer (2) to enhance the vibration reduction effect.

3. The gearbox vibration reduction and noise reduction structure according to claim 2, characterized in that: The constraining layer (3) is epoxy resin.

4. The gearbox vibration and noise reduction structure according to claim 3, characterized in that: The epoxy resin is formed on the vibration-damping layer (2) by a coating process.

5. The gearbox vibration and noise reduction structure according to claim 2, characterized in that: Also includes: A protective layer (5) is installed on a side of the noise reduction layer (4) away from the vibration reduction layer (2).

6. The gearbox vibration and noise reduction structure according to claim 5, characterized in that: The protective layer (5) is a steel plate.

7. The gearbox vibration and noise reduction structure according to claim 6, characterized in that: Also includes: The bolts are arranged in an array, and one end of the bolts passes through the steel plate and the noise reduction layer (4) in sequence and is fastened to the constraint layer (3).

8. A gearbox vibration and noise reduction structure according to any one of claims 1 to 7, characterized in that: The vibration-damping layer (2) is polyurethane.

9. A gearbox vibration reduction and noise reduction structure according to any one of claims 1 to 7, characterized in that: The noise reduction layer (4) is polyester fiber sound-absorbing cotton.

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