A honeycomb-like high-speed motor surface shell structure

Abstract

The utility model discloses a kind of similar honeycomb type high-speed motor surface shell structure, it is related to motor shell structure technical field, including motor shell base body, the inner surface of the motor shell base body is provided with honeycomb array, the unit depth of the honeycomb array is gradually shallow from the center area of inner surface to edge area in gradient, the surface of the honeycomb array is attached with functional damping layer.Gradient depth variation honeycomb array structure is used in the inner wall of motor shell base body, while significantly improving local rigidity and overall structural strength, scattering the vibration mode of shell surface, changing the sound wave propagation path, effectively inhibiting to medium-high frequency vibration is realized.

Description

Technical Field

[0001] This utility model relates to the technical field of motor housing structure, specifically a surface housing structure similar to a honeycomb high-speed motor. Background Technology

[0002] With the rapid development of high-end manufacturing fields such as new energy vehicles, precision machining equipment, and aerospace, high-speed motors have become indispensable core power components due to their high power density and excellent dynamic response performance. When the motor speed increases to over 10,000 revolutions per minute, the internal electromagnetic excitation force and mechanical imbalance force will significantly intensify, inevitably inducing severe vibration of the generator casing and radiating uncomfortable high-frequency noise. This noise problem not only affects the comfort of passengers and the precision of equipment, but also causes noise pollution to the working environment, constituting a key bottleneck in the industry's technological development.

[0003] To address the aforementioned vibration and noise challenges, the industry has developed several technological approaches. One approach involves structural design, such as optimizing the shell geometry and adding reinforcing ribs, to improve overall structural stiffness and alter its natural frequency, thus preventing resonance. Another approach focuses on material application, commonly employing methods such as bonding or coating damping materials onto the inner and outer walls of the motor housing. For example, laying rubber damping layers or spraying viscoelastic damping coatings utilizes the internal friction of these materials to convert mechanical vibration energy into heat energy, thereby achieving vibration reduction and noise reduction.

[0004] However, existing technologies still have shortcomings in use: simple structural reinforcement often has limited effect on noise suppression in the mid-to-high frequency range and easily increases system weight and cost. Commonly used damping materials such as rubber usually have poor temperature resistance and are prone to aging and failure under the high temperature environment generated by the continuous operation of high-speed motors. At the same time, their poor thermal conductivity will also form a thermal barrier between the motor and the external environment, which will seriously hinder heat dissipation and lead to increased motor temperature rise. More importantly, the interface between conventional damping coating and metal shell is very fragile under continuous high-speed vibration stress, and is prone to fatigue cracking and large-area peeling, which makes it difficult for its effective service life to exceed 2000 hours, and cannot meet the stringent durability requirements of high reliability application scenarios. Utility Model Content

[0005] The technical problem to be solved by this utility model is to overcome the existing defects and provide a honeycomb-like surface shell structure for a high-speed motor. By adopting a honeycomb array structure with gradient depth variation on the inner wall of the motor shell matrix, the local stiffness and overall structural strength are significantly improved, while the vibration modes of the shell surface are broken up and the sound wave propagation path is changed, thus effectively suppressing mid-to-high frequency vibrations. This can effectively solve the problems in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a honeycomb-like surface shell structure for a high-speed motor, comprising a motor housing substrate, wherein a honeycomb array is disposed on the inner surface of the motor housing substrate, and the depth of the cells in the honeycomb array gradually decreases from the central region to the edge region of the inner surface in a gradient manner, and a functional damping layer is attached to the surface of the honeycomb array. Through the composite structural design of the gradient-changing honeycomb array and the functional damping layer, a synergistic effect is achieved. The gradient-changing honeycomb array effectively disperses the vibration modes of the shell surface and changes the sound wave propagation path, thus achieving mid-to-high frequency noise reduction. Furthermore, the functional damping layer on the surface of the honeycomb array further dissipates vibration energy, thereby jointly solving the high-frequency vibration and noise problem of high-speed motors from both structural and material perspectives.

[0007] Furthermore, the cellular array is composed of regular hexagonal cellular cells. Using a regular hexagonal structure to construct the cellular array allows for the highest rigidity of the shell matrix with minimal material, while providing numerous regular and uniform reflection interfaces for sound waves, thereby optimizing the interference and attenuation effects of sound waves.

[0008] Furthermore, the depth of the cellular array is 4mm-5mm in the central region and 2mm-3mm in the edge region. Vibration and sound pressure are usually strongest in the central region, so a deeper cellular array can provide stronger stiffness and more effective acoustic trapping in this area. The gradual shallowing towards the edge smoothly matches the attenuation of vibration energy, avoiding new vibrations or stress concentrations caused by abrupt changes in structural stiffness, and achieving efficient and uniform conversion of acoustic energy into thermal energy.

[0009] Furthermore, the thickness of the functional damping layer is 0.5mm-2mm. This thickness range represents the optimal balance between achieving efficient damping and ensuring space compactness. If it is too thin, the damping effect will be insufficient; if it is too thick, it will increase weight and cost and affect heat dissipation. Within this range, the functional damping layer is sufficient to generate significant shear deformation to dissipate energy, while ensuring that it does not negatively affect the overall size of the motor and thermal management.

[0010] Furthermore, the functional damping layer is a composite material layer composed of a polyurethane matrix and ceramic microparticles. This composite material layer combines the high damping characteristics of the polyurethane matrix with the high hardness, high thermal conductivity, and wear resistance of the ceramic microparticles. The combination of the two forms a functional damping layer, which not only maintains excellent vibration reduction and noise reduction performance, but also significantly improves the temperature resistance and thermal conductivity of the coating, thereby overcoming the defects of ordinary rubber layers such as heat insulation and easy aging.

[0011] Furthermore, the ceramic microparticles are at least one of alumina, zirconium oxide, or silicon nitride. These ceramic materials possess extremely high hardness, good chemical stability, and excellent thermal conductivity. Incorporating them into the polyurethane matrix greatly enhances the bonding strength between the functional damping layer and the honeycomb array, while simultaneously constructing an efficient heat dissipation path, further improving the durability and heat dissipation efficiency of the functional damping layer.

[0012] Furthermore, the functional damping layer is formed through a spraying process. This spraying process ensures that the composite material slurry fully fills and uniformly covers the complex honeycomb array surface, forming a continuous functional damping layer without dead angles. This tight encapsulation structure maximizes the contact area between the two components, enhances the mechanical interlocking effect, and makes the functional damping layer less prone to peeling under high-speed vibration environments, ensuring long-term reliability.

[0013] Furthermore, the motor housing substrate is suitable for high-speed motors with speeds exceeding 10,000 rpm. The composite shell structure, consisting of the motor housing substrate, a honeycomb array, and a functional damping layer, is specifically optimized for the intense mid-to-high frequency vibration and noise spectrum under high-speed conditions exceeding 10,000 rpm. Its wideband noise reduction, high bonding strength, and excellent heat dissipation characteristics precisely address the pain points of traditional shell technologies under these extreme conditions, significantly improving the NVH performance and service life of high-end high-speed motors.

[0014] Based on the above technical solution, the beneficial effects achieved by the honeycomb-like high-speed motor surface shell structure of this utility model through practical application are as follows: 1. This utility model adopts a honeycomb array structure with gradient depth variation. By accurately reconstructing the structure of the motor housing substrate, it can significantly improve the local stiffness and overall structural strength while effectively suppressing mid-to-high frequency vibrations. Compared with the traditional solution of adding reinforcing ribs, this honeycomb structure itself has excellent specific stiffness. While achieving better noise reduction effect, it also achieves structural lightweighting and avoids the increase in weight and cost caused by excessive reinforcement.

[0015] 2. The functional damping layer in this utility model combines the high damping characteristics of organic polymers with the high thermal conductivity of inorganic ceramic materials. This composite material layer not only maintains excellent vibration reduction and noise reduction performance, but more importantly, the uniformly distributed ceramic particles in it construct an efficient heat conduction path, changing the unfavorable role of traditional rubber materials as "thermal barriers". It enables the material to promote heat dissipation while playing a damping role, significantly improving the reliability and lifespan of the motor under high-temperature conditions.

[0016] 3. This utility model utilizes the three-dimensional mechanical anchoring effect of the honeycomb array structure on the functional damping layer, combined with the dual effect of ceramic microparticles enhancing the strength of the coating body, to greatly enhance the interfacial bonding strength and stability between the damping layer and the metal substrate. This design enables the damping layer to withstand the alternating stress caused by long-term high-speed vibration, effectively suppressing the tendency of fatigue cracking and large-area peeling, thereby extending the service life of the product to well over 2000 hours, fully meeting the durability requirements of high-reliability application scenarios. Attached Figure Description

[0017] Figure 1 This is a front-view three-dimensional structural diagram of the present invention.

[0018] Figure 2 This is a three-dimensional structural diagram of the present invention after being cut open.

[0019] Figure 3 This is a schematic diagram of the unfolded planar structure of this utility model.

[0020] Figure 4 This is a schematic diagram of the cross-sectional structure of the gradient depth structure of this utility model.

[0021] Figure 5 This is a schematic diagram of the microstructure of the functional damping layer of this utility model.

[0022] In the figure: 1-motor housing substrate, 2-honeycomb array, 3-functional damping layer. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figure 1-5This embodiment provides a technical solution: a honeycomb-like surface shell structure for a high-speed motor, including a motor housing base 1. A honeycomb array 2 is disposed on the inner surface of the motor housing base 1. The depth of each cell in the honeycomb array 2 gradually decreases from the center region to the edge region of the inner surface. A functional damping layer 3 is attached to the surface of the honeycomb array 2. Through the composite structural design of the gradient-changing honeycomb array 2 and the functional damping layer 3, a synergistic effect is achieved. The gradient-changing honeycomb array 2 effectively disperses the vibration modes on the shell surface and changes the sound wave propagation path. This structural basis achieves mid-to-high frequency noise reduction, while the functional damping layer 3 on the surface of the honeycomb array 2 further dissipates vibration energy. Thus, the high-frequency vibration and noise problem of high-speed motors is solved from both structural and material perspectives.

[0025] Furthermore, the cellular array 2 is composed of regular hexagonal cellular units. By using a regular hexagonal structure to construct the cellular array 2, the shell substrate 1 can be made to have the highest rigidity with the least amount of material, while providing a large number of regular and uniform reflection interfaces for sound waves, thereby optimizing the interference and attenuation effects of sound waves.

[0026] Furthermore, the depth of the cellular array 2 in the central region is 4mm-5mm, and the depth in the edge region is 2mm-3mm. Vibration and sound pressure are usually strongest in the central region, so a deeper cellular array 2 can provide stronger stiffness and more effective acoustic trapping in this area. The gradual transition to the edge smoothly matches the attenuation of vibration energy, avoiding new vibrations or stress concentrations caused by abrupt changes in structural stiffness, and achieving efficient and uniform conversion of acoustic energy into thermal energy.

[0027] Furthermore, the thickness of the functional damping layer 3 is 0.5mm-2mm. This thickness range represents the optimal balance between achieving efficient damping and ensuring space compactness. If it is too thin, the damping effect will be insufficient; if it is too thick, it will increase weight, cost, and affect heat dissipation. Within this range, the functional damping layer 3 is sufficient to generate significant shear deformation to dissipate energy, while ensuring that it does not negatively affect the overall size of the motor and thermal management.

[0028] Furthermore, the functional damping layer 3 is a composite material layer composed of a polyurethane matrix and ceramic microparticles. This composite material layer combines the high damping characteristics of the polyurethane matrix with the high hardness, high thermal conductivity, and wear resistance of the ceramic microparticles. The combination of the two forms the functional damping layer 3, which not only maintains excellent vibration reduction and noise reduction performance, but also significantly improves the temperature resistance and thermal conductivity of the coating, thereby overcoming the defects of ordinary rubber layers such as heat insulation and easy aging.

[0029] Furthermore, the ceramic microparticles are at least one of alumina, zirconium oxide, or silicon nitride. These ceramic materials possess extremely high hardness, good chemical stability, and excellent thermal conductivity. Incorporating them into the polyurethane matrix greatly enhances the bonding strength between the functional damping layer 3 and the honeycomb array 2, while simultaneously constructing an efficient heat dissipation path, further improving the durability and heat dissipation efficiency of the functional damping layer 3.

[0030] Furthermore, the functional damping layer 3 is formed through a spraying process. The spraying process ensures that the composite material slurry is fully filled and uniformly covered on the surface of the complex honeycomb array 2, forming a continuous functional damping layer 3 without dead corners. This tight wrapping structure maximizes the contact area between the two and enhances the mechanical interlocking effect, making the functional damping layer 3 less prone to peeling off under high-speed vibration environment, thus ensuring the reliability of long-term use.

[0031] Furthermore, the motor housing substrate 1 is suitable for high-speed motors with speeds exceeding 10,000 rpm. The composite shell structure, consisting of the motor housing substrate 1, the honeycomb array 2, and the functional damping layer 3, is specifically optimized for the intense mid-to-high frequency vibration and noise spectrum under high-speed conditions exceeding 10,000 rpm. Its wideband noise reduction, high bonding strength, and excellent heat dissipation characteristics precisely address the pain points of traditional shell technologies under these extreme conditions, significantly improving the NVH performance and service life of high-end high-speed motors.

[0032] The working principle of the honeycomb-like high-speed motor surface shell structure provided by this utility model is as follows: During operation, when the high-speed motor runs, the generated vibration energy is transmitted to the motor housing matrix 1 through the stator. The honeycomb array 2 inside the motor housing matrix 1 plays a crucial role first. Its depth gradually changes from the center to the edge, allowing the local stiffness and natural frequency of different areas of the housing to be precisely reconstructed. This is equivalent to dividing a large-area uniform vibrating plate into countless small units with minute stiffness differences. This structure can effectively disperse and separate concentrated vibration modes, preventing strong overall resonance at specific frequencies, thus suppressing the amplification of vibration at the structural source. Subsequently, the vibration energy that is not completely suppressed causes microscopic deformation of the walls of the honeycomb array 2, which in turn causes continuous tensile and compressive deformation of the functional damping layer 3 attached to its surface, especially generating highly efficient shear deformation. In this high-frequency alternating deformation process, the composite material composed of polyurethane matrix and ceramic microparticles generates intense internal friction between the molecular chains and between the matrix and the microparticles, thus irreversibly converting the input mechanical vibration energy into heat energy. This process greatly dissipates the vibration energy. Especially in the mid-to-high frequency range of 800Hz-5000Hz, it achieves excellent damping effect. At the same time, when the sound wave propagates inside the motor housing substrate 1, it encounters the complex three-dimensional cavity formed by the honeycomb array 2 of varying depths. After the sound waves of different frequencies enter the honeycomb units of different depths, reflection, interference and resonance absorption will occur, and their propagation path will be greatly disturbed and lengthened. The sound wave energy will be attenuated due to mutual cancellation. The gradient change design ensures that this efficient acoustic suppression effect can be generated in a wide frequency range. In terms of heat dissipation, the ceramic particles in the composite damping layer 3 constitute a heat conduction path that runs through the polymer network. The generated heat can be conducted through the motor housing substrate 1 itself, and can also be dissipated more efficiently through the ceramic particles via the functional damping layer 3, avoiding the heat insulation problem of traditional rubber layers. In addition, the honeycomb array 2 forms a strong mechanical anchoring effect on the functional damping layer 3, which greatly increases the bonding area and adhesion, ensuring that the entire composite structure remains intact and reliable under long-term high-speed vibration, fundamentally solving the life problem of coating peeling.

[0033] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A honeycomb-like high-speed motor surface shell structure, characterized in that: The device includes a motor housing substrate, the inner surface of which is provided with a honeycomb array, the cell depth of which gradually decreases from the center region to the edge region of the inner surface, and a functional damping layer is attached to the surface of the honeycomb array.

2. The honeycomb-like high-speed motor surface shell structure according to claim 1, characterized in that: The cellular array is composed of regular hexagonal cellular cells.

3. The honeycomb-like high-speed motor surface shell structure according to claim 1, characterized in that: The depth of the cellular array in the central region is 4mm-5mm, and the depth in the edge region is 2mm-3mm.

4. The honeycomb-like high-speed motor surface shell structure according to claim 1, characterized in that: The thickness of the functional damping layer is 0.5mm-2mm.

5. The honeycomb-like high-speed motor surface shell structure according to claim 1, characterized in that: The functional damping layer is a composite material layer consisting of a polyurethane matrix and ceramic microparticles.

6. The honeycomb-like high-speed motor surface housing structure according to claim 5, characterized in that: The ceramic particles are at least one of alumina, zirconium oxide, or silicon nitride.

7. The honeycomb-like high-speed motor surface shell structure according to claim 1, characterized in that: The functional damping layer is formed by a spraying process.

8. The honeycomb-like high-speed motor surface housing structure according to claim 1, characterized in that: The motor housing base is suitable for high-speed motors with a speed higher than 10,000 rpm.

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