Damping noise reduction assembly, engineering machinery, vibration reduction method and device and medium

Abstract

The invention discloses a damping noise reduction assembly, engineering machinery, a vibration reduction method, a vibration reduction device and a medium, relates to the field of engineering machinery, and aims to meet the vibration reduction requirements of the engineering machinery under complex working conditions and long-time continuous operation conditions. The damping noise reduction assembly comprises a shell assembly, a middle layer, a restraining piece, a damping coating layer and a damping paint layer. The shell assembly comprises a shell, an expansion piece and damping slurry. The shell comprises a containing cavity, the expansion piece is fixed to the inner wall of the containing cavity, and a gap between the expansion piece and the shell is filled with the damping slurry. And the middle layer is fixedly connected with the shell assembly. The restraining piece is fixedly connected with the side, away from the shell assembly, of the middle layer. The damping coating layer is fixedly connected with the side, away from the middle layer, of the restraining piece. The damping paint layer is fixedly connected with the side, away from the restraining piece, of the damping coating layer. According to the technical scheme, through the multi-layer synergistic effect, vibration is absorbed, isolated and consumed from different aspects, the noise reduction effect is greatly improved, and the noise reduction device is particularly suitable for complex working conditions and working conditions of long-time continuous operation.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of engineering machinery, in particular to a damping noise reduction assembly, an engineering machinery, a damping method, a device and a medium. BACKGROUND

[0002] With the accelerated promotion of the electrification process of engineering machinery, the power system has gradually replaced the traditional internal combustion engine with a silent motor. This technical change makes the noise problem of key components such as hydraulic elements and transmission elements more prominent. For example, the noise contribution of the hydraulic pump in the electric loader to the whole vehicle is more than 70%, and the noise contribution of the drive axle in the electric crane to the whole vehicle is more than 50%. Such noise problems not only seriously hinder the further development of engineering machinery electrification, but also become one of the reasons restricting the entry of Chinese engineering machinery into the international market. According to statistics, the annual export trade loss of engineering machinery equipment and components due to noise indicators not meeting standards is as high as tens of billions of yuan.

[0003] The inventor found after research that in the field of noise control, reducing noise from the source of vibration by optimizing the internal structure of key components is the most fundamental solution. However, due to the limited development level of domestic related technologies, breakthroughs in this path are difficult to achieve. Therefore, reducing noise by blocking the vibration transmission path has become the main technical direction of the current industry.

[0004] The inventor found that at least the following problems exist in the prior art: engineering machinery has the significant characteristics of variable working conditions and long-time continuous operation, and the existing damping structure cannot meet the damping requirements of engineering machinery. SUMMARY

[0005] The present application provides a damping noise reduction assembly, an engineering machinery, a damping method, a device and a medium to meet the damping requirements of engineering machinery under complex working conditions and long-time continuous operation.

[0006] The damping noise reduction assembly provided by the embodiment of the present application comprises:

[0007] The shell assembly comprises a shell, an expansion piece and a damping paste. The shell comprises a containing cavity, the expansion piece is fixed to the inner wall of the containing cavity, and the damping paste fills the gap between the expansion piece and the shell.

[0008] The intermediate layer is fixedly connected with the shell assembly.

[0009] The constraint piece is fixedly connected with the side of the intermediate layer away from the shell assembly.

[0010] The damping coating layer is fixedly connected with the side of the constraint piece away from the intermediate layer.

[0011] A damping paint layer is fixedly connected to the side of the damping paint layer away from the restraint.

[0012] In some embodiments, the extension member is configured in a Y shape or a ¥ shape, and one end of the extension member is fixedly connected to the inner wall of the shell.

[0013] In some embodiments, the extension member comprises two layers, and the two layers of the extension member are symmetrically arranged with respect to the center line in the thickness direction of the shell, or the two layers of the extension member are staggered with respect to the center line in the thickness direction of the shell.

[0014] In some embodiments, along the thickness direction of the shell, the first gap is provided between the two layers of the extension member.

[0015] In some embodiments, the shell is configured in a cuboid, and the shell is provided with an opening at one end in the length direction.

[0016] In some embodiments, the intermediate layer comprises a plurality of damping rubbers arranged at intervals, each of the damping rubbers is fixed between the shell and the restraint, and the second gap is provided between adjacent two of the damping rubbers.

[0017] The embodiment of the present application also provides an engineering machine comprising the damping noise reduction assembly provided by any of the technical solutions of the present application.

[0018] In some embodiments, the engineering machine further comprises:

[0019] A cover body, the damping noise reduction assembly is used as the cover body, or the damping noise reduction assembly is mounted on the surface of the cover body.

[0020] The embodiment of the present application further provides an engineering machine damping method comprising the following steps:

[0021] Determining a damping target parameter;

[0022] Determining the structure of the damping noise reduction assembly according to the damping target parameter;

[0023] Manufacturing the damping noise reduction assembly;

[0024] Mounting the damping noise reduction assembly to the cover body of the engineering machine or using the damping noise reduction assembly as the cover body of the engineering machine.

[0025] In some embodiments, the step of determining the structure of the damping noise reduction assembly according to the damping target parameter specifically comprises the following steps:

[0026] Determining the structure of the shell assembly of the damping noise reduction assembly;

[0027] Determining the thickness of the intermediate layer of the damping noise reduction assembly;

[0028] Determine the thickness of the constraint member of the damping noise reduction component;

[0029] Determine the thickness of the damping coating layer of the damping noise reduction component;

[0030] Determine the thickness of the damping paint layer of the damping noise reduction component.

[0031] In some embodiments, determining the structure of the housing assembly of the damping noise reduction component specifically includes the following steps:

[0032] Determine the thickness of the housing of the housing assembly;

[0033] Determine the structure and number of the extensions of the housing assembly.

[0034] In some embodiments, the extension is configured as Y-shaped or ¥-shaped.

[0035] In some embodiments, the extensions are arranged in two rows, both located inside the housing, with one row of extensions located at the top of the housing and the other row of extensions located at the bottom of the housing.

[0036] This invention also provides a vibration damping device for engineering machinery, comprising:

[0037] Memory; and

[0038] A processor coupled to the memory is configured to execute the vibration reduction method provided by any of the technical solutions of the present invention based on instructions stored in the memory.

[0039] This invention also provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the vibration reduction method provided by any of the technical solutions of this invention.

[0040] The damping noise reduction component provided by the above technical solution includes a shell assembly, an intermediate layer, a constraint member, a damping coating layer, and a damping paint layer. The extension member of the shell assembly is tightly fixed to the inner wall of the accommodating cavity, forming a specific structure with the shell, and the gap between them is filled with damping slurry. The gap can be designed with an irregular shape to increase the contact area between the damping slurry and the shell and extension member, enhancing the damping effect. The damping slurry has high density and a high loss factor, exhibiting excellent performance in suppressing low-frequency vibrations and structural sound transmission. The intermediate layer is arranged between the shell assembly and the constraint member, forming a constrained damping layer. The intermediate layer effectively buffers vibration transmission, significantly reducing the impact of vibration on the constraint member, thereby improving the noise reduction effect of the entire damping noise reduction component and creating a quieter environment. The constraint member effectively constrains the vibration deformation of the intermediate layer. The damping coating layer effectively absorbs vibration energy and converts it into heat energy for dissipation, further reducing vibration and noise. The damping paint layer has good wear resistance and corrosion resistance. It can not only protect the internal structure from external environmental erosion, but also work together with the damping coating layer to play a damping and noise reduction role. It is closely bonded to the damping coating layer to form a complete damping and noise reduction structure.

[0041] The above-mentioned technical solution, through the synergistic effect of a multi-layered structure, absorbs, isolates, and dissipates vibrations from different aspects, significantly improving the damping and noise reduction effect. The damping and noise reduction component has a reasonable structural design, is easy to manufacture and install, and can be widely used in various equipment and scenarios requiring damping and noise reduction, especially suitable for complex working conditions and long-term continuous operation. Attached Figure Description

[0042] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, illustrate exemplary embodiments of the invention and, together with their description, serve to explain the invention and do not constitute an undue limitation thereof. In the drawings:

[0043] Figure 1 This is a three-dimensional structural diagram of the damping and noise reduction component provided in an embodiment of the present invention.

[0044] Figure 2 This is a cross-sectional schematic diagram of the damping noise reduction component provided in an embodiment of the present invention.

[0045] Figure 3 This is a cross-sectional schematic diagram of the housing component 1 of the damping noise reduction component provided in an embodiment of the present invention.

[0046] Figure 4 A logical schematic diagram illustrating the structure of the housing assembly 1 for determining the vibration reduction method for engineering machinery provided in this embodiment of the invention.

[0047] Figure label:

[0048] 1. Shell assembly; 2. Intermediate layer; 3. Constraints; 4. Damping coating layer; 5. Damping paint layer;

[0049] 11. Housing; 12. Extension; 13. Damping slurry; 14. First gap; 15. Opening;

[0050] 21. Damping adhesive; 22. Second gap. Detailed Implementation

[0051] The following is combined with Figures 1-4 The technical solutions provided by this invention will be described in more detail below. The descriptions of exemplary embodiments are merely illustrative and are in no way intended to limit this disclosure or its application or use. This disclosure can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are provided to make this disclosure thorough and complete, and to fully express the scope of this disclosure to those skilled in the art. It should be noted that, unless otherwise specifically stated, the relative arrangement of components and steps, the composition of materials, numerical expressions, and values ​​set forth in these embodiments should be interpreted as merely exemplary and not as limiting.

[0052] The terms “first,” “second,” and similar terms used in this disclosure do not indicate any order, quantity, or importance, but are merely used to distinguish different parts. Terms such as “including” or “contains” mean that the element preceding the word covers the element listed after the word, and do not exclude the possibility of covering other elements as well.

[0053] In this disclosure, when a specific device is described as being located between a first device and a second device, an intermediary device may or may not be present between the specific device and the first or second device. When a specific device is described as being connected to other devices, the specific device may be directly connected to the other devices without an intermediary device, or it may be not directly connected to the other devices but have an intermediary device.

[0054] All terms used in this disclosure, including technical or scientific terms, have the same meaning as understood by one of ordinary skill in the art to which this disclosure pertains, unless otherwise specifically defined. It should also be understood that terms defined in a general dictionary, such as a dictionary, should be interpreted as having a meaning consistent with their meaning in the context of the relevant art, and not as having an idealized or highly formalized meaning, unless expressly defined herein.

[0055] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment shall be considered part of the specification.

[0056] The dimensions of the various parts shown in the accompanying drawings are not drawn to actual scale. Common structural elements or elements of the same type are given the same reference numerals in the various drawings, and repeated descriptions of them are omitted where appropriate.

[0057] Further research by the inventors revealed that construction machinery is characterized by variable operating conditions and long-term continuous operation, requiring noise reduction solutions for key components to maintain stable and ideal noise reduction effects under dynamic loads and prolonged high-load conditions. Existing traditional vibration transmission path blocking methods, such as structural damping enhancement, vibration isolation base optimization, and local mass tuning, are all designed to block the dominant frequency vibration energy at specific speeds, which can no longer meet the above new requirements. Specifically, they have the following two major drawbacks:

[0058] Frequency mismatch under varying operating conditions leads to vibration isolation failure: The actual operating speed and load pressure of key components of construction machinery need to be dynamically adjusted within a large range, which makes it difficult to match the vibration blocking frequency band preset by traditional methods with the real-time excitation frequency, resulting in a significant decrease or even complete failure of vibration isolation performance. In extreme cases, it may also cause resonance risk, seriously affecting the safety of equipment operation.

[0059] Long-term operation temperature rise leads to insufficient noise reduction adaptability: When key components are running under continuous high load conditions, the thermal expansion effect will cause material aging, which will cause irreversible changes in their inherent damping characteristics. This will directly lead to a narrowing of the vibration blocking frequency band, and ultimately result in a systemic decrease in noise reduction capability, making it impossible to maintain a stable noise reduction effect under long-term operating conditions.

[0060] In summary, under the background of electrification of construction machinery, noise issues of key components have become a core constraint on the industry's development. Existing technologies, whether for noise reduction at the source or noise reduction along the path, are limited by their own limitations and cannot meet the stringent requirements of variable operating conditions and long-term operation. Therefore, a new type of vibration reduction structure is urgently needed to overcome the bottlenecks of existing technologies. The technical solution of this invention can effectively meet the vibration reduction requirements under variable operating conditions and long-term operation.

[0061] Some embodiments of the present invention provide a damping noise reduction component, including a housing assembly 1, an intermediate layer 2, a constraint member 3, a damping coating layer 4, and a damping paint layer 5. The housing assembly 1 includes a housing 11, an extension member 12, and a damping paste 13. The housing 11 includes a receiving cavity, the extension member 12 is fixed to the inner wall of the receiving cavity, and the damping paste 13 fills the gap between the extension member 12 and the housing 11. The intermediate layer 2 is fixedly connected to the housing assembly 1. The constraint member 3 is fixedly connected to the side of the intermediate layer 2 away from the housing assembly 1. The damping coating layer 4 is fixedly connected to the side of the constraint member 3 away from the intermediate layer 2. The damping paint layer 5 is fixedly connected to the side of the damping coating layer 4 away from the constraint member 3.

[0062] Both the housing 11 and the extension 12 can be made of cast iron and are cast together. The housing 11 and the extension 12 are integrally formed using a casting process. This method ensures a tight connection, a stable structure, reduces weak points such as gaps caused by assembly, and improves overall strength and stability. Cast iron is a relatively inexpensive and widely available material for both the housing 11 and the extension 12, and it has good casting properties, allowing it to be cast into complex shapes to meet different design requirements. It also possesses certain damping properties, which help reduce vibration.

[0063] The extension 12 is tightly fixed to the inner wall of the accommodating cavity, forming a specific structure with the shell 11, and the gap between them is filled with damping slurry 13. The gap can be designed with an irregular shape to increase the contact area between the damping slurry 13 and the shell 11 and the extension 12, thereby enhancing the damping effect. The damping slurry 13 has the characteristics of high density and high loss factor, and performs excellently in suppressing low-frequency vibrations and structural sound transmission.

[0064] In some embodiments, the housing 11 is constructed as a cuboid, and an opening 15 is provided at one end of the housing 11 along its length. The regular shape of the cuboid makes it easy to arrange and install the damping noise reduction assembly in the device, allowing it to better cooperate with other components and saving space. When needed, damping slurry 13 is added to the interior of the housing 11 through the opening 15.

[0065] In some embodiments, the extension 12 is configured as Y-shaped or ¥-shaped, and one end of the extension 12 is fixedly connected to the inner wall of the housing 11.

[0066] When the extension member 12 is Y-shaped, its three branches can evenly distribute and transmit vibrations, increasing the contact area with the damping slurry 13, allowing the damping slurry 13 to absorb vibration energy more fully. The three branches of the Y-shape can be designed with different lengths and angles according to actual needs to better adapt to the internal space and vibration characteristics of the shell 11. One end is fixed to the inner wall of the shell 11 by casting, resulting in high connection strength and ensuring that the extension member 12 is firmly connected to the shell 11 during vibration and will not loosen.

[0067] If the extension component 12 is constructed in the shape of a ¥, the structure is more complex and can more effectively disperse vibrations, further improving the damping effect. The ¥-shaped extension component 12 is also cast and fixed at one end to the housing 11 to withstand larger vibration loads, ensuring that the extension component 12 works stably and collaboratively with the housing 11 during operation.

[0068] The Y-shaped or ¥-shaped extension 12 significantly increases the contact area with the damping slurry 13, making the damping slurry 13 more efficient in absorbing and suppressing vibrations, thereby more effectively reducing low-frequency vibrations and structural sound transmission. Extensions 12 of different shapes can be selected according to actual application scenarios and vibration characteristics, enhancing the adaptability of the damping noise reduction components and meeting the diverse needs of various equipment.

[0069] The two adjacent extension pieces 12 are not touching to form a gap. By using the extension pieces 12, the shear area of ​​the damping slurry 13 can be increased. The overall vertical deformation of the shell 11 enhances the shear effect of the damping slurry 13, thus further improving its vibration reduction and noise reduction effect.

[0070] In some embodiments, the extension member 12 comprises two layers, the two layers of extension members 12 being arranged symmetrically with respect to the centerline of the thickness direction of the housing 11; or, the two layers of extension members 12 being arranged staggered with respect to the centerline of the thickness direction of the housing 11. The thickness direction is... Figure 2 and Figure 3 The up and down directions.

[0071] When the two layers of extension members 12 are symmetrically arranged with respect to the centerline of the shell 11 in the thickness direction, the structure has good symmetry and uniform stress distribution. This allows vibrations to be more evenly dispersed and suppressed during transmission, preventing excessive local vibrations due to uneven stress distribution. A certain gap can be set between the two layers of extension members 12, and the gap can be filled with damping slurry 13 to increase the effective space of the damping slurry 13 and enhance the damping effect. The symmetrical arrangement also facilitates manufacturing and installation, reduces production difficulty, and ensures consistent product quality. Symmetrical arrangement refers to... Figure 1 As shown, the two extension pieces 12 are in the same horizontal position in the horizontal direction.

[0072] If the two layers of extension members 12 are staggered relative to the centerline of the shell 11 in the thickness direction, this layout can break the regularity of vibration transmission, causing vibrations to interfere with each other during transmission and further consuming vibration energy. The staggered arrangement can be specifically designed according to the characteristics of vibrations in different frequency bands. For example, the upper extension member 12 can primarily handle high-frequency vibrations, while the lower extension member 12 can focus on handling low-frequency vibrations, thereby achieving comprehensive suppression of vibrations in different frequency bands. Damping slurry 13 is also filled between the two layers of extension members 12 and the shell 11, fully utilizing the advantages of the damping slurry 13 in suppressing vibration and structural sound transmission. The staggered arrangement refers to... Figure 1 As shown, the horizontal positions of the upper and lower extension pieces 12 are different in the horizontal direction.

[0073] The symmetrically arranged extensions 12 ensure the stability of the structure and the balance of vibration suppression, which helps to improve the overall damping and noise reduction effect, while simplifying the production process and reducing costs.

[0074] The staggered arrangement of the extension components 12 breaks the vibration transmission law, effectively suppressing vibrations in different frequency bands, improving the versatility and adaptability of the damping noise reduction components, and better meeting the needs of complex and ever-changing practical application scenarios. Both arrangement methods utilize the characteristics of the damping slurry 13 to enhance the component's ability to suppress vibration and structural sound transmission, effectively reducing noise and creating a quieter environment.

[0075] In some embodiments, a first gap 14 is provided between the two extensions 12 along the thickness direction of the housing 11. The first gap 14 is used to accommodate the damping slurry 13.

[0076] The width of the first gap 14 can be flexibly adjusted according to actual needs. A narrower gap allows the damping paste 13 to fill more tightly, enhancing the adhesion between the damping paste 13 and the extension member 12, improving the efficiency of vibration energy transfer and absorption, and thus more effectively suppressing high-frequency vibrations. A wider gap, on the other hand, can accommodate more damping paste 13, increasing the mass of the damping paste 13 and achieving a better effect in suppressing low-frequency vibrations.

[0077] The first gap 14 can be designed as a regular parallel structure, which facilitates processing and manufacturing, ensures that the damping slurry 13 is evenly distributed within the gap, and is conducive to the stable performance of the damping effect. Alternatively, it can be designed as an irregular shape, such as a wavy or sawtooth shape. This shape can increase the contact area between the damping slurry 13 and the extension member 12, further improving the damping effect and allowing vibration energy to be more fully absorbed and converted on the complex contact surface.

[0078] The first gap 14 accommodates the damping slurry 13, providing space for the damping slurry 13 to exert its characteristics of suppressing low-frequency vibrations and structural sound transmission, significantly enhancing the damping noise reduction component's ability to suppress vibrations in different frequency bands. The adjustable gap width allows the damping noise reduction component to be optimized according to actual vibration characteristics, improving the component's adaptability and meeting the damping noise reduction needs of different application scenarios.

[0079] Intermediate layer 2 is positioned between shell assembly 1 and constraint member 3, forming a constraint damping layer. Intermediate layer 2 effectively buffers vibration transmission, significantly reducing the impact of vibration on constraint member 3, thereby improving the noise reduction effect of the entire damping and noise reduction assembly and creating a quieter environment. Furthermore, it is firmly connected to shell assembly 1 by adhesive bonding or hot pressing, ensuring effective transmission and dissipation of vibration energy.

[0080] In some embodiments, the intermediate layer 2 includes a plurality of spaced damping adhesives 21; each damping adhesive 21 is fixed between the housing 11 and the constraint member 3, and a second gap 22 is formed between adjacent damping adhesives 21. The damping adhesives 21 are generally cuboid in shape after solidification. The damping adhesives 21 are designed with different thicknesses and formulations, and through an efficient shear deformation energy dissipation mechanism, the damping adhesives 21 exhibit excellent performance in suppressing mid-frequency vibrations.

[0081] When applying damping adhesive 21, a heat-resistant adhesive should be selected to ensure bonding strength and a firm bond to the housing 11. When using hot-melt bonding for damping adhesive 21, heating parameters should be set according to the thermal stability of the damping material and bonding requirements. During spraying or brushing, attention should be paid to uniform coating and bubble control. After adhesive application, bubbles should be eliminated using vacuum degassing or hot-press defoaming processes. Before connection, the surface of the housing 11 and the bonding surface of the damping material should be cleaned thoroughly using appropriate solvents or ultrasonic cleaning methods. Ensure the oil resistance of each damping layer, especially the damping paint; ensure the heat aging resistance, tensile strength, and elongation at break of each damping layer.

[0082] The intermediate layer 2 is interspersed with damping adhesive layers and air layers. The damping adhesive 21 is applied to both sides using hot-melt bonding or adhesive application methods, connecting it to the shell assembly 1 and the constraint member 3 to form the damping adhesive layer. Air is distributed between adjacent damping adhesive layers 21, forming an air layer. The vibration coupling between the solid and the air fluid generates damping, forming an air film damping structure. The air layer serves to dissipate heat while also reducing vibration and sound radiation.

[0083] The constraint component 3 is made of metal, such as aluminum alloy. Aluminum alloy has high strength and relatively light weight, which can effectively constrain the vibration and deformation of the intermediate layer 2 without adding too much weight. It is fixed to the intermediate layer 2 by adhesive or other means to ensure a stable connection.

[0084] Damping coating is sprayed onto the constraint plate to form damping coating layer 4. Specifically, water-based damping coating can be used, which is environmentally friendly, pollution-free, and easy to apply. It can be evenly sprayed onto the side of the constraint 3 furthest from the intermediate layer 2. It effectively absorbs vibration energy and converts it into heat energy for dissipation, further reducing vibration and noise. As a free damping layer, damping coating layer 4, based on the low density and thinness of the damping coating, dissipates energy through its own tensile-compression deformation, exhibiting excellent performance in suppressing high-frequency vibrations and airborne sound transmission.

[0085] Damping paint is brushed onto the damping coating layer 4 to form the damping paint layer 5. The damping paint used is epoxy damping paint, which has excellent wear resistance and corrosion resistance. It not only protects the internal structure from external environmental erosion but also works in conjunction with the damping coating layer 4 to perform damping and noise reduction. It adheres tightly to the damping coating layer 4, forming a complete damping and noise reduction structure. The damping paint layer 5 serves to protect and maintain the aesthetic appearance while also reducing vibration and sound radiation.

[0086] Furthermore, the aforementioned technical solution features tightly connected components forming a multi-layered composite structure, which, through their combined action, greatly enhances damping and noise reduction capabilities and provides effective suppression of vibrations in different frequency bands.

[0087] Damping slurry 13 exhibits excellent performance in suppressing low-frequency vibrations and structural sound transmission. Combined with intermediate layer 2, constraint component 3, damping coating layer 4, and damping paint layer 5, it effectively reduces noise generated during equipment operation, creating a quiet operating environment. The above technical solution covers the entire frequency range from low to high frequencies, providing vibration reduction across the entire frequency spectrum.

[0088] The cast iron shell 11 and extension 12 are low-cost and have good casting performance. The rubber intermediate layer 2 has good cushioning performance. The aluminum alloy restraint 3 has high strength and light weight. The water-based damping coating is environmentally friendly and easy to apply. The epoxy damping paint is wear-resistant and corrosion-resistant. The overall material selection takes into account both performance and cost, and has good economic efficiency and practicality.

[0089] This invention also provides an engineering machinery, including the damping and noise reduction component provided by any of the technical solutions of this invention.

[0090] The engineering machinery provided in this embodiment of the invention, having the aforementioned damping and noise reduction components, also possesses the aforementioned technical effects.

[0091] In some embodiments, the engineering machinery further includes a housing, with the damping noise reduction component serving as the housing. Alternatively, the damping noise reduction component can be mounted on the surface of the housing.

[0092] The cover can be a protective cover for the hydraulic pump or a protective cover for the drive axle.

[0093] If the damping and noise reduction components are used as a protective cover for the hydraulic pump, the actual structure of the cover can be determined as follows: The actual structure of the cover is determined based on the external dimensions and installation requirements of the hydraulic pump, and the cross-section of the cover always conforms to the structure of the damping and noise reduction components described above. The cover has a semi-enclosed structure, covering most of the parts of the hydraulic pump that are susceptible to external influences. Holes corresponding to the hydraulic pump's inlet and outlet ports, motor connection points, etc., are pre-drilled on the housing 11. This cover effectively reduces the vibration and noise generated by the hydraulic pump during operation, minimizing the impact on the surrounding environment and operators; it protects the hydraulic pump from external impacts, dust, moisture, etc., extending its service life; the semi-enclosed structure facilitates routine maintenance and repair of the hydraulic pump.

[0094] If the damping and noise reduction components are used as an external cover for the drive axle, i.e., a protective cover, they can be customized according to the shape, size, and operating characteristics of the drive axle. The cover is a fully or mostly enclosed structure that closely fits the shape of the drive axle, providing good sealing. Reinforcing ribs are provided on the inner wall of the housing 11 to enhance overall rigidity. The extension 12 fits tightly against the surface of the drive axle, buffering vibrations. The intermediate layer 2, constraint component 3, and other layers work together. The cover provided by the above technical solution can reduce the vibration and noise generated during drive axle operation, improving vehicle driving comfort; protect the drive axle from road debris, mud, and other erosion, improving drive axle reliability; and the fully or mostly enclosed structure provides a certain degree of protection for the drive axle, reducing damage caused by accidental collisions.

[0095] The same damping and noise reduction component design can be flexibly applied to protective covers for different engineering machinery parts, offering strong versatility and reducing design and manufacturing costs. It not only protects the components but also effectively dampens and reduces noise, improving the overall performance and user experience of the engineering machinery. The specific structure of the damping and noise reduction component can be adaptively designed to suit the characteristics of different components, achieving optimal protection and noise reduction effects.

[0096] This invention also provides a vibration reduction method for engineering machinery, comprising the following steps:

[0097] Step 1: Determine the target parameters for vibration reduction.

[0098] Vibration testing equipment, such as accelerometers and vibration spectrum analyzers, can be used to comprehensively measure the vibration of construction machinery under different working conditions. Data such as vibration frequency range, amplitude, and vibration direction can be collected, and combined with actual usage requirements and industry standards, specific parameters that need to be achieved after vibration reduction can be determined, such as reducing the vibration amplitude to below a certain value or reducing the vibration energy in a specific frequency range by a certain percentage.

[0099] Precise vibration reduction target parameters provide a clear direction for subsequent component design, ensuring that damping and noise reduction components can be effectively optimized for actual vibration problems in engineering machinery, avoiding over-design or under-design, and improving the vibration reduction and noise reduction efficiency and economy of the components.

[0100] Step 2: Determine the structure of the damping and noise reduction components based on the vibration reduction target parameters.

[0101] The above steps specifically include the following: determining the structure of the housing component 1 of the damping noise reduction component; determining the thickness of the intermediate layer 2 of the damping noise reduction component; determining the thickness of the constraint component 3 of the damping noise reduction component; determining the thickness of the damping coating layer 4 of the damping noise reduction component; and determining the thickness of the damping paint layer 5 of the damping noise reduction component.

[0102] The structure of housing assembly 1 is determined using the following steps: determining the thickness of housing 11 of housing assembly 1; and determining the structure and quantity of extension members 12 of housing assembly 1. Extension members 12 are constructed as either Y-shaped or ¥-shaped.

[0103] See Figure 4 First, we establish mathematical descriptions of the modal, noise, and temperature characteristics of each layer of the damping noise reduction component.

[0104] For example, a mathematical description of the modal, noise, and temperature characteristics of the damping noise reduction component is established. Different damping layer thicknesses, the mass ratio of shell 11 to constraint 3, the air gap thickness of intermediate layer 2, different damping layer material loss factors, free damping elastic storage modulus, and constrained damping shear storage modulus are selected as design variables, with modal loss factor, peak noise pressure, and temperature as optimization objectives. The finite element method is used to calculate the influence of different design parameters on the modal loss factor, peak noise pressure, and temperature, obtaining an initial dataset for the damping layer optimization design. Based on the central composite design (CCD) method, a mathematical mapping relationship between design parameters, modal characteristics, noise response, and temperature is established, and multinomial regression is used for data fitting to ensure high model accuracy. The prediction error of the response surface is calculated, and the prediction accuracy of the model is tested using new data points. Finally, sensitivity analysis is used to evaluate the degree of influence of different design parameters on the optimization objectives and to analyze the key factors affecting vibration, noise, and temperature characteristics.

[0105] Secondly, a multi-objective genetic algorithm was constructed to optimize the design parameters of the damping structure. With the objective functions of maximizing the modal loss factor, minimizing the peak noise pressure, and minimizing the temperature, a multi-objective optimization problem was established. Simultaneously, the damping layer thickness range, modal frequency, and overall weight were set as constraints to ensure the feasibility of the optimization scheme. A non-dominated sorting genetic algorithm was used for global optimization to solve for the optimal damping layer configuration under different working conditions. Pareto front analysis was used to obtain the equilibrium solution among different optimization objectives, and the scheme with the best overall performance was selected. Furthermore, simulations were performed to calculate the vibration response, noise level, and temperature before and after optimization to evaluate the optimization effect. Finally, the Monte Carlo method was used for robustness analysis to verify the adaptability of the optimized scheme under different working conditions, thus forming the optimal configuration scheme for the damping structure.

[0106] Finally, the performance of the optimized damping structure design was evaluated based on the experimental testing platform. A temperature, vibration, and noise measurement platform was built, ensuring the measurement environment met standard requirements. Temperature sensors, vibration acceleration sensors, and sound pressure sensors were installed, and a data acquisition system was designed based on the LabVIEW platform to record temperature, vibration, and noise data. Experimental groups with different design variables were set up to measure the temperature, vibration, and noise levels of key components under different operating conditions. The effects of different parameters on temperature, vibration, and noise were evaluated, and the experimental measurements were compared with the optimized simulation predictions to verify the accuracy of the optimization strategy.

[0107] Specifically, the thickness of the shell 11 is determined as follows: According to mathematical description, if the working environment of the engineering machinery is harsh and the vibration and impact are large, a thicker high-strength steel plate can be selected to suppress the vibration propagation by increasing the mass and rigidity of the shell 11; if there are strict restrictions on weight and the vibration is relatively small, a thinner aluminum alloy plate can be used.

[0108] The structure and quantity of the extension members 12 are determined as follows: If a Y-type extension member 12 is used, its bifurcated structure can more effectively disperse vibration energy, making it particularly suitable for areas with complex vibration directions. A ¥-type extension member 12 can provide a larger contact area and elastic deformation capacity within a limited space. The quantity of extension members 12 is determined based on vibration reduction requirements and the internal space of the housing 11. For example, the quantity of extension members 12 can be appropriately increased for areas with strong vibrations to enhance the vibration reduction effect.

[0109] In some embodiments, the extension members 12 are divided into two rows, both located inside the housing 11, with one row of extension members 12 located at the top of the housing 11 and the other row of extension members 12 located at the bottom of the housing 11.

[0110] Two rows of extension members 12 are located at the top and bottom of the housing 11, respectively. This layout can effectively suppress the transmission of vibrations in the vertical direction, while also providing some buffering effect on horizontal vibrations. The top extension member 12 can reduce the impact of vibrations from above, while the bottom extension member 12 can buffer the vibrations caused by ground reaction forces.

[0111] The reasonable thickness design of the shell 11 can optimize the vibration suppression effect while ensuring structural strength; the specific structure and number of extension parts 12 and their reasonable distribution can absorb and disperse vibration energy in different directions, greatly improving the damping and noise reduction components' adaptability to complex vibrations.

[0112] The thickness of the intermediate layer 2 is determined as follows: Based on the mathematical expression above, if better isolation of high-frequency vibrations is required, the thickness of the intermediate layer 2 can be appropriately increased, such as by using a thicker fiber-reinforced composite material; if the overall weight is more sensitive and low-frequency vibrations are the main problem, the thickness can be appropriately reduced. A thicker intermediate layer 2 can more effectively block vibration transmission while enhancing the overall rigidity of the component.

[0113] The thickness of constraint 3 is determined as follows: Based on the mathematical expression above, if the intermediate layer 2 material is relatively soft, stronger constraints are needed to limit its deformation, and a thicker constraint 3 can be used. If the intermediate layer 2 itself has good rigidity, the thickness of constraint 3 can be appropriately reduced. A suitable thickness of constraint 3 can optimize the vibration damping performance of the intermediate layer 2 and enhance the overall stability of the component.

[0114] The thickness of the damping coating layer 4 is determined as follows: Based on the damping performance requirements in the vibration reduction objectives, the thickness of the damping coating layer 4 is appropriately increased in the high-frequency vibration region to improve the absorption of high-frequency vibration energy; it can be appropriately thinned in the low-frequency region. A damping coating layer 4 of appropriate thickness can effectively dissipate vibration energy in different frequency ranges, improving the overall noise reduction effect.

[0115] Determining the thickness of damping paint layer 5: Considering both its protective and damping functions. If the working environment of the construction machinery is harsh and requires better protection, the thickness of damping paint layer 5 can be appropriately increased. If lightweight design is prioritized and the environment is relatively favorable, the thickness can be reduced. A damping paint layer 5 of appropriate thickness can both protect internal components and, to some extent, supplement the damping and noise reduction effect.

[0116] Step 3: Manufacture the damping and noise reduction components.

[0117] Based on the determined structural parameters of each component, appropriate manufacturing processes are selected. For example, the shell 11 is manufactured using casting or stamping processes; the extension 12 is manufactured using molding rubber processes; the intermediate layer 2 is formed using hot-pressed fiber-reinforced composite materials; the constraint component 3 is manufactured using stamped metal sheet processes; and the damping coating layer 4 and damping paint layer 5 are applied using spraying processes. After each component is manufactured, it is assembled according to design requirements to ensure that all components are tightly connected.

[0118] Step four: Manufacture the damping noise reduction components into the required shape of the enclosure.

[0119] Technical benefits: Precise manufacturing according to design parameters ensures that the component performance meets the expected vibration reduction target. Appropriate manufacturing processes guarantee the quality of each component, improving the overall reliability and stability of the component.

[0120] This vibration reduction method, through a scientific process from target identification to design, manufacturing, and installation, forms a complete system capable of precisely and effectively solving vibration problems in construction machinery. The structural parameters of each component are meticulously determined, allowing for customized design based on the characteristics and actual vibration conditions of different construction machinery, thus improving the adaptability and effectiveness of the vibration reduction solution. Reasonable manufacturing and installation processes ensure component performance and stability, enhancing the overall performance and service life of the construction machinery, while creating a more comfortable and quieter working environment for operators. This ensures that the damping and noise reduction components maintain excellent vibration reduction performance even under varying operating conditions such as changes in excitation frequency and large temperature rise ranges.

[0121] This invention provides a vibration reduction device for engineering machinery, including a memory and a processor coupled to the memory. The processor is configured to execute the vibration reduction method in any of the foregoing embodiments based on instructions stored in the memory.

[0122] Memory may include, for example, system memory, fixed non-volatile storage media, etc. System memory may store, for example, the operating system, application programs, boot loader, and other programs.

[0123] Some embodiments of this disclosure also provide a computer-readable storage medium having a computer program stored thereon. When executed by a processor, this program implements the vibration reduction method of any of the above embodiments.

[0124] The processors described herein may include general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs) or other programmable logic devices, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described herein. A general-purpose processor may be a microprocessor, but in alternatives, it may be any conventional processor, controller, microcontroller, or state machine. The processor may also be implemented as a combination of computing devices, such as a combination of a DSP and a microprocessor, multiple microprocessors, one or more microprocessors cooperating with a DSP core, or any other such configuration.

[0125] Storage media can be any available medium that can be accessed by a computer. By way of example and not limitation, such computer-readable media may include RAM, ROM, EEPROM, CD-ROM or other optical disc storage, disk storage or other magnetic storage devices, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer. Any connection is also properly referred to as computer-readable media. For example, if software is transmitted from a website, server, or other remote source using coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), or wireless technologies such as infrared, radio, and microwave, then such coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwave are included in the definition of media. As used herein, disk and disc include compact discs (CDs), laser discs, optical discs, digital multi-purpose discs (DVDs), floppy disks, and Blu-ray discs, where disks typically reproduce data magnetically, and discs reproduce data optically using lasers. Combinations of the above should also be included within the scope of computer-readable media.

[0126] Those skilled in the art will understand that the method embodiments of this disclosure can be provided as a method, system, or computer program product. Therefore, this disclosure can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this disclosure can take the form of a computer program product embodied on one or more computer-usable non-transitory storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0127] This disclosure is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It should be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart illustrations and / or block diagrams. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0128] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0129] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0130] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this invention. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0131] In the description of this invention, each technical feature may be combined with other technical features where feasible.

[0132] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. However, these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A damping noise reduction component, characterized in that, include: The housing assembly (1) includes a housing (11), an extension (12), and a damping slurry (13); the housing (11) includes a receiving cavity, the extension (12) is fixed to the inner wall of the receiving cavity, and the damping slurry (13) fills the gap between the extension (12) and the housing (11); The intermediate layer (2) is fixedly connected to the housing assembly (1); The constraint member (3) is fixedly connected to the side of the intermediate layer (2) away from the housing assembly (1); The damping coating layer (4) is fixedly connected to the side of the constraint member (3) away from the intermediate layer (2); and The damping paint layer (5) is fixedly connected to the side of the damping coating layer (4) away from the constraint member (3).

2. The damping noise reduction component according to claim 1, characterized in that, The extension (12) is constructed in a Y-shape or a ¥-shape, and one end of the extension (12) is fixedly connected to the inner wall of the housing (11).

3. The damping noise reduction component according to claim 1, characterized in that, The extension member (12) comprises two layers, the two layers of the extension member (12) being arranged symmetrically with respect to the center line of the thickness direction of the housing (11); or, the two layers of the extension member (12) being arranged staggered with respect to the center line of the thickness direction of the housing (11).

4. The damping noise reduction component according to claim 3, characterized in that, Along the thickness direction of the housing (11), there is a first gap (14) between the two layers of the extension (12).

5. The damping noise reduction component according to claim 1, characterized in that, The housing (11) is constructed as a cuboid, and the housing (11) has an opening (15) at one end along the length direction.

6. The damping noise reduction component according to claim 1, characterized in that, The intermediate layer (2) includes a plurality of spaced damping adhesives (21); each damping adhesive (21) is fixed between the housing (11) and the constraint member (3), and there is a second gap (22) between two adjacent damping adhesives (21).

7. An engineering machinery, characterized in that, Includes the damping noise reduction component as described in any one of claims 1-6.

8. The engineering machinery according to claim 7, characterized in that, Also includes: The cover is a damping noise reduction component; or the damping noise reduction component is mounted on the surface of the cover.

9. A method for vibration reduction in engineering machinery, characterized in that, Includes the following steps: Determine the target parameters for vibration reduction; The structure of the damping and noise reduction component is determined based on the vibration reduction target parameters; Manufacturing the aforementioned damping noise reduction component; The damping and noise reduction component is installed on the cover of the engineering machinery or serves as the cover of the engineering machinery.

10. The vibration reduction method for engineering machinery according to claim 9, characterized in that, Determining the structure of the damping and noise reduction component based on the vibration reduction target parameters specifically includes the following steps: Determine the structure of the housing assembly (1) of the damping noise reduction component; Determine the thickness of the intermediate layer (2) of the damping noise reduction component; Determine the thickness of the constraint member (3) of the damping noise reduction component; Determine the thickness of the damping coating layer (4) of the damping noise reduction component; Determine the thickness of the damping paint layer (5) of the damping noise reduction component.

11. The vibration reduction method for engineering machinery according to claim 10, characterized in that, The determination of the structure of the housing assembly (1) of the damping noise reduction component specifically includes the following steps: Determine the thickness of the housing (11) of the housing assembly (1); Determine the structure and number of the extensions (12) of the housing assembly (1).

12. The vibration reduction method for engineering machinery according to claim 11, characterized in that, The extension (12) is configured as Y-shaped or ¥-shaped.

13. The vibration reduction method for engineering machinery according to claim 11, characterized in that, The extension members (12) are divided into two rows, both located inside the housing (11). One row of the extension members (12) is located at the top of the housing (11), and the other row of the extension members (12) is located at the bottom of the housing (11).

14. A vibration damping device for engineering machinery, characterized in that, include: Memory; and A processor coupled to the memory, the processor being configured to execute the vibration reduction method as described in any one of claims 9-13 based on instructions stored in the memory.

15. A computer-readable storage medium, characterized in that, It stores a computer program that, when executed by a processor, implements the vibration reduction method as described in any one of claims 9-13.

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