Damping gasket, motor and fan

Abstract

The invention provides a damping gasket, a motor and a fan. The damping gasket comprises a first wear-resistant layer and a second wear-resistant layer, the elastic layer is arranged on one side of the wear-resistant layer; the damping layer is arranged on the side, away from the first wear-resistant layer, of the elastic layer; the second wear-resistant layer is arranged on the side, away from the elastic layer, of the damping layer; the first wear-resistant layer, the elastic layer, the damping layer and the second wear-resistant layer are sequentially stacked to form a multi-layer composite structure. According to the damping gasket, the wear resistance and the elasticity of the damping gasket can be improved, and the service life of the elastic gasket is prolonged.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electric machines, in particular to a damping gasket, an electric machine and a fan. BACKGROUND

[0002] In the current design of the fan blade system, the electric machine as the core driving component inevitably produces vibration when running at high speed. This vibration energy not only propagates along the electric machine itself, but also is transmitted to the entire device and even the external environment through the fan blade and its supporting structure, resulting in a series of negative effects. First, the physical impact and noise caused by vibration seriously affect the user experience and the comfort of the working environment, especially in situations that require silent or low-noise operation, such as office air conditioners, household air purifiers, etc. Second, the long-term effect of vibration can make the fan blade system unstable, increase the relative displacement between parts, accelerate wear and tear, reduce device efficiency, and even cause safety hazards, affecting the service life.

[0003] For the damping measures of the fan blade system, the existing technology relies on single-material gaskets such as rubber, plastic, etc. These gaskets can absorb vibration to some extent, but their performance limitations are significant. They have limited absorption capacity when dealing with high-frequency vibration, and for continuous high-speed working conditions, single-material gaskets often cannot effectively disperse and dissipate vibration energy, are prone to fatigue failure due to stress concentration, and eventually lose damping function. In addition, due to the lack of sufficient wear resistance and elastic recovery mechanism, such gaskets are prone to accelerated wear and irreversible deformation after continuous friction and deformation of the fan blade and the electric machine, further weakening the stability and reliability of the system. SUMMARY

[0004] The main purpose of the present application is to provide a damping gasket, an electric machine and a fan, which can improve the wear resistance and elasticity of the damping gasket and prolong the service life of the elastic gasket.

[0005] In order to achieve the above-mentioned purpose, according to one aspect of the present application, a damping gasket is provided, comprising: a first wear-resistant layer; an elastic layer arranged on one side of the wear-resistant layer; a damping layer arranged on the side of the elastic layer away from the first wear-resistant layer; a second wear-resistant layer arranged on the side of the damping layer away from the elastic layer; the first wear-resistant layer, the elastic layer, the damping layer and the second wear-resistant layer are sequentially stacked to form a multi-layer composite structure.

[0006] Further, the elastic layer is formed by pouring a plurality of materials with different elastic moduli on the first wear-resistant layer, and the elastic modulus of each layer of material of the elastic layer increases in the direction away from the first wear-resistant layer.

[0007] Further, the elastic layer is formed by pouring a single elastic modulus material on the first wear-resistant layer.

[0008] Further, the first wear-resistant layer is provided with a plurality of protrusions at one end thereof facing the elastic layer, the plurality of protrusions decreasing in cross-sectional area in a direction away from the first wear-resistant layer, and the plurality of protrusions are embedded in the elastic layer.

[0009] Further, the plurality of protrusions include a plurality of pyramids and / or a plurality of truncated pyramids, and the plurality of pyramids and / or the plurality of truncated pyramids are evenly distributed on the end face of the first wear-resistant layer.

[0010] Further, at least part of the plurality of pyramids and / or the plurality of truncated pyramids are of different sizes and heights; and / or, part of the plurality of pyramids protrude out of the elastic layer and penetrate into the damping layer.

[0011] Further, the damping layer has an elastic modulus greater than that of the elastic layer, and the damping layer is cast on the elastic layer.

[0012] Further, the damping layer is provided with a plurality of non-uniformly distributed tapered holes at one end thereof away from the elastic layer.

[0013] Further, part of the tapered holes increase in cross-sectional area in a direction away from the elastic layer, and part of the tapered holes decrease in cross-sectional area in a direction away from the elastic layer.

[0014] Further, the damping layer is of an open-cell foam structure, and the damping layer is filled with sound-absorbing particles.

[0015] Further, the second wear-resistant layer is provided with a plurality of pyramids at one side thereof facing the damping layer, the plurality of pyramids have an axial height less than that of the damping layer, and the plurality of pyramids penetrate into the damping layer.

[0016] According to another aspect of the present application, there is provided an electric machine comprising a rotating shaft and a damping pad, the damping pad being sleeved on the rotating shaft.

[0017] According to another aspect of the present application, there is provided a fan comprising a fan blade and an electric machine, the fan blade comprising a fan blade mounting portion, the rotating shaft being provided with a snap ring, a flat washer, an elastic washer and a nut, the flat washer, the damping pad, the fan blade mounting portion, the flat washer and the elastic washer being sequentially arranged between the snap ring and the nut.

[0018] The damping gasket is formed by the first wear-resistant layer, the elastic layer, the damping layer and the second wear-resistant layer in sequence to form a multi-layer composite structure. The first wear-resistant layer and the second wear-resistant layer have excellent wear resistance and can withstand the extrusion and friction transmitted by the system components, thereby providing the damping gasket structure with basic structural strength and effectively resisting wear in daily operation. The elastic layer is arranged between the first wear-resistant layer and the damping layer and can deform when subjected to pressure, thereby buffering and absorbing vibration energy in daily operation. The damping layer is the core part of the damping gasket and can more effectively convert and consume vibration energy. The multi-layer composite damping gasket of the embodiment optimizes the functional characteristics of each layer through the superposition and mutual cooperation of the multi-layer materials, achieves better damping effect, wear resistance and longer service life, and meets higher requirements for damping and wear resistance under high-speed working conditions. When the motor is applied to the motor of the application, the motor vibration can be effectively isolated, the noise generated during equipment operation can be reduced, and the stability and service life of the equipment can be improved. When the motor of the application is applied to the fan of the application, the technical problems of poor control of the motor vibration transmission path in the fan blade system, limited damping effect of the traditional gasket and poor wear resistance are solved. BRIEF DESCRIPTION OF DRAWINGS

[0019] The drawings accompanying the specification of this application form a part thereof, serve to provide further understanding of the application, and together with the description, explain the application. The specific embodiments of the application and its description are used to explain the application without imposing undue limitations on the application. In the drawings:

[0020] Figure 1 An assembly structure schematic diagram of a fan of one embodiment of the application is shown;

[0021] Figure 2 A structure schematic diagram of a damping gasket of one embodiment of the application is shown;

[0022] Figure 3 A cross-sectional structure schematic diagram of a damping gasket of one embodiment of the application is shown;

[0023] Figure 4 A three-dimensional structure schematic diagram of a first wear-resistant layer of a damping gasket of one embodiment of the application is shown;

[0024] Figure 5 An assembly structure schematic diagram of a first wear-resistant layer and an elastic layer of a damping gasket of one embodiment of the application is shown;

[0025] Figure 6 An assembly structure schematic diagram of a first wear-resistant layer, an elastic layer and a damping layer of a damping gasket of one embodiment of the application is shown;

[0026] Figure 7A cross-sectional structural schematic diagram of an assembly structure of a first wear-resistant layer, an elastic layer and a damping layer of a shock-absorbing gasket of one embodiment of the present application is shown.

[0027] Figure 8 A three-dimensional structural schematic diagram of a second wear-resistant layer of a shock-absorbing gasket of one embodiment of the present application is shown.

[0028] Figure 9 An assembly structure cross-sectional view of a fan of one embodiment of the present application is shown.

[0029] Among them, the above-mentioned drawings include the following reference signs:

[0030] 1, first wear-resistant layer; 2, elastic layer; 3, damping layer; 4, second wear-resistant layer; 5, protrusion; 6, tapered hole; 7, multi-prism; 8, rotating shaft; 9, shock-absorbing gasket; 10, fan blade mounting portion; 11, snap ring; 12, flat gasket; 13, elastic gasket; 14, nut. DETAILED DESCRIPTION

[0031] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The present application will be described in detail below with reference to the drawings and in combination with embodiments.

[0032] For reference Figures 1 to 9 As shown, according to the embodiment of the present application, a shock-absorbing gasket is provided, which comprises: a first wear-resistant layer 1; an elastic layer 2 arranged on one side of the wear-resistant layer; a damping layer 3 arranged on the side of the elastic layer 2 away from the first wear-resistant layer 1; a second wear-resistant layer 4 arranged on the side of the damping layer 3 away from the elastic layer 2; and the first wear-resistant layer 1, the elastic layer 2, the damping layer 3 and the second wear-resistant layer 4 are sequentially superimposed to form a multi-layer composite structure.

[0033] In the above embodiment, the damping pad is formed by sequentially stacking the first wear-resistant layer 1, the elastic layer 2, the damping layer 3, and the second wear-resistant layer 4 to form a multi-layer composite structure. The first wear-resistant layer 1 and the second wear-resistant layer 4 have excellent wear resistance and can withstand the extrusion and friction transmitted by the system components, providing the damping pad structure with basic structural strength and effectively resisting wear during daily operation. The elastic layer 2 is arranged between the first wear-resistant layer 1 and the damping layer 3, and utilizes the elasticity of its material to deform when subjected to pressure, thereby buffering and absorbing the vibration energy during daily operation. The damping layer 3 is the core part of the damping pad, which can more effectively convert and consume vibration energy. The multi-layer composite damping pad of the present embodiment optimizes the functional characteristics of each layer through the stacking and cooperation of multiple layers of materials, achieves better damping effect, wear resistance, and longer service life, and meets the higher requirements for damping and wear resistance under high-speed working conditions. When applied to the motor of the present application, it can effectively isolate the motor vibration, reduce the noise generated during equipment operation, and improve the stability and service life of the equipment. When the motor of the present application is applied to the fan of the present application, it solves the technical problems of poor control of the motor vibration transmission path in the fan blade system, limited damping effect of traditional pads, and poor wear resistance in the prior art.

[0034] In another embodiment, the first wear-resistant layer 1 and the second wear-resistant layer 4 are made of polytetrafluoroethylene material.

[0035] In the above embodiment, the first wear-resistant layer 1 and the second wear-resistant layer 4 are made of polytetrafluoroethylene material, which has excellent chemical corrosion resistance and can maintain excellent mechanical properties in the temperature range of -196℃ to 260℃. It has small surface tension, good non-stick properties, and small friction coefficient. Using polytetrafluoroethylene material to make the first wear-resistant layer 1 and the second wear-resistant layer 4 improves the structural strength of the first wear-resistant layer 1 and the second wear-resistant layer 4, and can more effectively resist wear during daily operation.

[0036] In another embodiment, the elastic layer 2 is formed by pouring multiple layers of materials with different elastic moduli on the first wear-resistant layer 1, and the elastic modulus of each layer of the elastic layer 2 increases in the direction away from the first wear-resistant layer 1.

[0037] In the above embodiment, the elastic layer 2 is formed by pouring multiple layers of materials with different elastic moduli on the first wear-resistant layer 1, and the elastic modulus of each layer of material of the elastic layer 2 increases in the direction away from the first wear-resistant layer 1. When the shock pad assembly is subjected to external pressure, the elastic layer 2 can exhibit a layered elastic deformation characteristic. Since the elastic modulus of each layer of material of the elastic layer 2 increases in the direction away from the first wear-resistant layer 1, the elastic modulus of the material of the elastic layer 2 close to the first wear-resistant layer 1 is small, which can quickly respond to and transmit the pressure. As the cross section of the elastic layer 2 moves away from the first wear-resistant layer 1, the elastic modulus of the material of the elastic layer 2 gradually increases, thereby being able to absorb more vibration energy, ensuring that the entire pad maintains good shock-absorbing effect in different stress stages. At the same time, due to the gradient design of the elastic modulus of the elastic layer 2, the residual stress in the recovery process of the shock pad after being subjected to pressure can be effectively reduced, and the stability of the shock pad during long-term use can be improved. In addition, the layered design of the elastic layer 2 also gives the shock pad a wider working range, so that it can perform excellent performance under different rotating speeds and load conditions. When applied to the fan of the present application, the service life of the entire system can be prolonged, and the noise level during operation can be reduced.

[0038] In this embodiment, the first layer of the elastic layer 2 closest to the first wear-resistant layer 1 adopts a lower elastic modulus. The softness of this layer of material enables it to respond quickly to axial vibrations and absorb initial vibration energy, especially in the low frequency band. The initial deformation capability of the low elastic modulus material can ensure that most of the low frequency vibrations are absorbed in the shallow layer of the pad, reducing the amount of vibration transmitted to the deep layer.

[0039] In the middle part of the elastic layer 2, the elastic modulus gradually increases. This gradual change helps the pad to further absorb and disperse the remaining vibration energy through the stiffer material layers under different frequencies and intensities of vibration, especially in the medium frequency band. By controlling the elastic modulus of each layer, the entire elastic layer can gradually attenuate the vibration intensity during vibration transmission, like a filter, ensuring efficient absorption of vibration energy.

[0040] The last layer of the elastic layer 2 farthest from the first wear-resistant layer 1, i.e., closest to the damping layer 3, adopts the highest elastic modulus. The role of this layer of material is to provide firm support and deformation recovery capability under high load or high frequency vibration, preventing the pad from excessive deformation or damage, while also absorbing high frequency vibration energy. The rigidity of the high elastic modulus material can ensure the stability and durability of the pad under high intensity vibration.

[0041] From the first wear-resistant layer 1 to the damping layer 3, the material elastic modulus of the elastic layer 2 presents a gradually increasing trend. This gradient change design can form a continuous energy attenuation zone on the propagation path of the axial vibration of the gasket, and different layers of materials can absorb and convert vibration energy at different vibration frequencies and intensities at the best point, so as to realize the optimal damping effect of the whole gasket.

[0042] In another embodiment, the elastic layer 2 is formed by pouring a single elastic modulus material on the first wear-resistant layer 1.

[0043] In the above embodiment, the elastic layer 2 is formed by pouring a single elastic modulus material on the first wear-resistant layer 1. This structure ensures the firm combination between the elastic layer 2 and the first wear-resistant layer 1, and the single elastic modulus material gives the elastic layer 2 consistent elastic recovery performance, so that the damping gasket can provide stable and uniform damping effect when bearing the dynamic load transmitted by the fan blade, simplifies the manufacturing process of the elastic layer 2, and avoids the design and manufacturing costs introduced by using multiple layers of gradient materials.

[0044] In this embodiment, when applied to the fan of the present application, the elastic layer 2 can still effectively absorb medium and low frequency vibrations, and cooperate with the wear resistance of the first wear-resistant layer 1 to achieve good isolation of the fan blade vibration, reduce the noise and vibration during equipment operation, and improve the overall operation stability and service life.

[0045] In another embodiment, the first wear-resistant layer 1 is provided with a plurality of protrusions 5 at one end facing the elastic layer 2, the cross-sectional area of the protrusions 5 decreases along the direction away from the first wear-resistant layer 1, and the plurality of protrusions 5 are embedded in the elastic layer 2.

[0046] In the above embodiment, the first wear-resistant layer 1 is provided with a plurality of protrusions 5 at one end facing the elastic layer 2, the cross-sectional area of the protrusions 5 decreases along the direction away from the first wear-resistant layer 1, and the plurality of protrusions 5 are embedded in the elastic layer 2. The bonding force of the materials of the first wear-resistant layer 1 and the elastic layer 2 is enhanced, so that the materials of each layer can work together to effectively disperse stress and avoid fatigue damage caused by local stress concentration when the composite gasket bears load. Through the embedded contact of the plurality of protrusions 5 and the elastic layer 2, not only the interface stability between the first wear-resistant layer 1 and the elastic layer 2 is improved, but also the overall elastic deformation characteristics of the composite gasket are optimized, so that better damping effect is realized. In a high-frequency vibration environment, the design of the protrusions 5 can reduce the energy loss in the vibration transmission process, so as to ensure that the damping gasket maintains its excellent damping performance and wear resistance in long-term use. When applied to the fan of the present application, the service life of the fan blade system can be prolonged, and the equipment operation noise can be reduced.

[0047] In another embodiment, the plurality of protrusions 5 are in the shape of a plurality of polygonal pyramids 7, and the plurality of polygonal pyramids 7 are uniformly distributed on the end face of the first wear-resistant layer 1.

[0048] In the above embodiment, the plurality of protrusions 5 comprise a plurality of polygonal pyramids 7, which are evenly distributed on the end surface of the first wear-resistant layer 1. Through this non-uniform distribution design, the first wear-resistant layer 1 can form a more complex contact network with the contact surface, not only increasing the contact area, but also effectively dispersing the pressure of the contact points, preventing material fatigue and damage caused by local stress concentration. When applied to the motor of the present application, this structure can better adapt to the dynamic pressure changes caused by motor vibration, improving the overall wear resistance and fatigue resistance of the damping pad.

[0049] In another embodiment, the plurality of protrusions 5 are shaped as a plurality of polygonal platforms, which are evenly distributed on the end surface of the first wear-resistant layer 1.

[0050] In the above embodiment, the plurality of protrusions 5 comprise a plurality of polygonal platforms, which are evenly distributed on the end surface of the first wear-resistant layer 1. Through this non-uniform distribution design, the first wear-resistant layer 1 can form a more complex contact network with the contact surface, not only increasing the contact area, but also effectively dispersing the pressure of the contact points, preventing material fatigue and damage caused by local stress concentration. When applied to the motor of the present application, this structure can better adapt to the dynamic pressure changes caused by motor vibration, improving the overall wear resistance and fatigue resistance of the damping pad.

[0051] In another embodiment, at least part of the plurality of polygonal pyramids 7 and / or polygonal platforms are of different sizes and heights.

[0052] In the above embodiment, at least part of the plurality of polygonal pyramids 7 and / or polygonal platforms are of different sizes and heights. This is an adaptation to different degrees of elastic deformation of different areas of the elastic layer 2 material, thereby achieving non-uniform absorption and dispersion of vibration, effectively reducing vibration transmission, and thus improving the damping effect.

[0053] In another embodiment, part of the plurality of polygonal pyramids 7 protrude out of the elastic layer 2 and penetrate into the damping layer 3.

[0054] In the above embodiment, part of the plurality of polygonal pyramids 7 protrude out of the elastic layer 2 and penetrate into the damping layer 3. This structure increases the firmness of the connection between the first wear-resistant layer 1 and the elastic layer 2 and the damping layer 3, improves the bonding force and stability between the materials, and ensures the performance consistency of the damping pad under long-term operation. Since the polygonal pyramids 7 are provided on the first wear-resistant layer 1, the polygonal pyramids 7 have a certain structural strength, and after the polygonal pyramids 7 penetrate into the elastic layer 2 and the damping layer 3, they can provide certain constraints to the elastic structure of the elastic layer 2, allowing the elastic layer 2 to better play a damping role when compressed. At the same time, the penetration of the polygonal pyramids 7 into the damping layer 3 improves the deformation mode of the damping layer 3 and enhances the vibration absorption capacity of the damping layer 3.

[0055] In another embodiment, the damping layer 3 has a larger elastic modulus than the elastic layer 2, and the damping layer 3 is cast on the elastic layer 2.

[0056] In the above embodiment, the damping layer 3 has a larger elastic modulus than the elastic layer 2, and the damping layer 3 is cast on the elastic layer 2. By utilizing the characteristics of different materials, when the shock pad is subjected to pressure, the elastic layer 2 deforms first to absorb most of the vibration energy, and then the damping layer 3 further absorbs the remaining vibration with its higher elastic modulus, especially high-frequency vibration, achieving multi-stage buffering and conversion of vibration energy. Thus, the shock pad can more effectively block and absorb vibration, reduce equipment operation noise, and improve overall operation stability. At the same time, this multi-layer composite structure ensures the elastic recovery ability and wear resistance of the shock pad in long-term use, prolongs the service life, and ensures the reliability and stability of the equipment under high-speed working conditions.

[0057] In another embodiment, the surface of the end of the damping layer 3 away from the elastic layer 2 is provided with a plurality of non-uniformly distributed tapered holes 6.

[0058] In the above embodiment, the surface of the end of the damping layer 3 away from the elastic layer 2 is provided with a plurality of non-uniformly distributed tapered holes 6. This design is based on the overall structure of the composite shock pad. By providing tapered holes 6 on the surface of the damping layer 3, especially in a non-uniform distribution manner, the absorption capacity of different frequency vibrations can be effectively enhanced. This structure can provide differential damping effect according to the stress distribution at different positions when the shock pad is under pressure, avoiding the situation of insufficient damping or excessive damping of a single structure under complex working conditions. The setting of tapered holes 6 optimizes the absorption path of high-frequency vibration, so that the vibration energy can pass through more energy dissipation points when passing through the damping layer 3, thereby achieving more effective shock absorption.

[0059] In another embodiment, the diameters of the tapered holes 6 are different.

[0060] In another embodiment, the depths of the tapered holes 6 are different.

[0061] In another embodiment, the spacings of the tapered holes 6 are different.

[0062] In another embodiment, part of the tapered holes 6 have an increasing cross-sectional area along the direction away from the elastic layer 2, and part of the tapered holes 6 have a decreasing cross-sectional area along the direction away from the elastic layer 2.

[0063] In the above embodiments, the taper hole 6 presents an increasing and decreasing change in cross-sectional area in the direction away from the elastic layer 2. The taper hole 6 of this structure can adjust the absorption and release of vibration energy according to the different vibration transmission paths, achieving more accurate vibration control. The taper hole 6 with increasing cross-sectional area in the direction away from the elastic layer 2 can effectively capture and consume low-frequency and large-amplitude vibration energy, improving the stability of the system and reducing noise. On the contrary, the taper hole 6 with decreasing cross-sectional area in the direction away from the elastic layer 2 is more suitable for high-frequency and small-amplitude vibration absorption, ensuring that the damping pad can perform outstandingly in a wide frequency range.

[0064] In another embodiment, the damping layer 3 is a porous foam structure, and the damping layer 3 is filled with sound-absorbing particles inside.

[0065] In the above embodiments, the damping layer 3 adopts a porous foam structure and is filled with sound-absorbing particles inside. This design enables the damping layer 3 not only to absorb vibration energy through its material properties but also to further enhance energy conversion and dissipation of sound waves with the help of sound-absorbing particles, especially in the processing of noise in the medium and low frequency range. The porous foam structure provides more free space, which helps the internal air flow. When vibration occurs, these pores can effectively increase the damping effect and weaken the intensity of vibration. The filled sound-absorbing particles can work together with the porous foam structure to form an efficient vibration and sound wave energy absorption system.

[0066] In another embodiment, the second wear-resistant layer 4 is provided with a plurality of multi-prisms 7 on the side facing the damping layer 3, the axial height of the plurality of multi-prisms 7 is less than the axial height of the damping layer 3, and the plurality of multi-prisms 7 pierce into the damping layer 3.

[0067] In the above embodiments, the second wear-resistant layer 4 is provided with a plurality of multi-prisms 7 on the side facing the damping layer 3, the axial height of the plurality of multi-prisms 7 is less than the axial height of the damping layer 3, ensuring that the multi-prisms 7 can pierce into the damping layer 3 but not penetrate the damping layer 3 to pierce into the elastic layer 2 inside, thereby forming stable contact points between the second wear-resistant layer 4 and the damping layer 3, enhancing the friction and bonding strength of the interface. The interface stability between the second wear-resistant layer 4 and the damping layer 3 is improved, and the overall elastic deformation characteristics of the composite pad are optimized, achieving better damping effect. In a high-frequency vibration environment, the axial force is transmitted to the damping layer 3 through the multi-prisms 7 of the second wear-resistant layer 4, and the vibration energy is absorbed through the elastic deformation of the damping layer 3, thereby achieving the effect of shock absorption and noise reduction. The piercing design of the multi-prisms 7 can also promote the internal flow and stress redistribution of the damping layer 3 material, further optimizing the damping performance. The distribution characteristics and height difference design of the multi-prisms 7 can adapt to different pressure distributions, making the stress of the damping pad more uniform when under pressure, effectively avoiding fatigue damage caused by stress concentration, and prolonging the service life of the damping pad.

[0068] Referring to Figures 1 to 9 As shown in the drawings, according to the embodiment of the present application, a motor is provided, comprising a rotating shaft 8 and a damping washer 9, the damping washer 9 is sleeved on the rotating shaft 8.

[0069] In the above embodiment, by applying the damping washer 9 with a multi-layer composite structure to the motor, the transmission of vibration generated during the operation of the motor to the fan blade structure can be effectively blocked, and the equipment operation noise can be reduced. The first wear-resistant layer 1 and the second wear-resistant layer 4 enhance the wear resistance of the washer and the rotating shaft 8, prolonging the service life of the washer. The elastic layer 2 absorbs most of the vibration energy when deformed under pressure, providing good cushioning effect. The damping layer 3 further consumes the remaining vibration energy through the high damping property of its material, strengthening the damping performance. Therefore, the motor exhibits more stable performance and lower noise level during operation, effectively improving the overall operation quality and service life of the equipment, and solving the problems of large noise and unstable operation caused by motor vibration.

[0070] Referring to Figures 1 to 9 As shown in the drawings, according to the embodiment of the present application, a fan is provided, comprising a fan blade and a motor, the fan blade comprises a fan blade mounting portion 10, a snap ring 11, a flat washer 12, an elastic washer 13 and a nut 14 are arranged on the rotating shaft 8, and the flat washer 12, the damping washer 9, the fan blade mounting portion 10, the flat washer 12 and the elastic washer 13 are sequentially arranged between the snap ring 11 and the nut 14.

[0071] In the above embodiment, by using the damping washer 9, the fan system can effectively isolate the transmission of motor vibration, reduce the noise during operation, and improve the stability and service life of the equipment. The first wear-resistant layer 1 and the second wear-resistant layer 4 in the damping washer 9 enhance the wear resistance of the washer, ensuring the reliability of long-term operation; the setting of the elastic layer 2 and the damping layer 3 further optimizes the vibration absorption effect, especially under high-speed working conditions, which can effectively reduce the influence of motor vibration on the fan blade system, improving the operation quality and durability of the overall equipment. Therefore, the fan not only has significant damping effect, but also can maintain good running state, prolong the maintenance period of the equipment, and has practical application value.

[0072] It should be noted that the terms used herein are only intended to describe specific embodiments and are not intended to limit exemplary embodiments according to the present application. As used herein, the singular form is intended to include the plural form, unless the context clearly indicates otherwise, and it should be understood that when the terms "comprise" and / or "include" are used in the specification, there is a presence of the features, steps, operations, devices, components and / or combinations thereof.

[0073] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in sequences other than those illustrated or described herein.

[0074] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A shock-absorbing pad, characterized in that, include: First wear-resistant layer (1); An elastic layer (2) is disposed on one side of the wear-resistant layer; A damping layer (3) is disposed on the side of the elastic layer (2) away from the first wear-resistant layer (1); The second wear-resistant layer (4) is disposed on the side of the damping layer (3) away from the elastic layer (2); The first wear-resistant layer (1), the elastic layer (2), the damping layer (3) and the second wear-resistant layer (4) are stacked in sequence to form a multi-layer composite structure.

2. The shock-absorbing pad according to claim 1, characterized in that, The elastic layer (2) is formed by casting multiple layers of materials with different elastic moduli onto the first wear-resistant layer (1). Along the direction away from the first wear-resistant layer (1), the elastic modulus of each layer of the elastic layer (2) increases.

3. The shock-absorbing pad according to claim 1, characterized in that, The elastic layer (2) is formed by casting a material with a single elastic modulus onto the first wear-resistant layer (1).

4. The shock-absorbing pad according to claim 1, characterized in that, The first wear-resistant layer (1) has a plurality of protrusions (5) at one end facing the elastic layer (2). The cross-sectional area of ​​the protrusions (5) decreases along the direction away from the first wear-resistant layer (1), and the plurality of protrusions (5) are embedded in the elastic layer (2).

5. The shock-absorbing pad according to claim 4, characterized in that, The plurality of protrusions (5) include pyramids (7) and / or frustums, and the plurality of pyramids (7) and / or frustums are evenly distributed on the end face of the first wear-resistant layer (1).

6. The shock-absorbing pad according to claim 5, characterized in that, At least some of the plurality of pyramids (7) and / or frustums are of different sizes and heights; and / or, portions of the plurality of pyramids (7) extend beyond the elastic layer (2) and penetrate into the damping layer (3).

7. The shock-absorbing pad according to claim 1, characterized in that, The elastic modulus of the damping layer (3) is greater than that of the elastic layer (2), and the damping layer (3) is cast onto the elastic layer (2).

8. The shock-absorbing pad according to claim 1, characterized in that, The surface of the damping layer (3) away from the elastic layer (2) has a plurality of non-uniformly distributed conical holes (6).

9. The shock-absorbing pad according to claim 8, characterized in that, The cross-sectional area of ​​some of the conical holes (6) increases along the direction away from the elastic layer (2), and the cross-sectional area of ​​some of the conical holes (6) decreases along the direction away from the elastic layer (2).

10. The shock-absorbing pad according to claim 1, characterized in that, The damping layer (3) is an open-cell foam structure, and the damping layer (3) is filled with sound-absorbing particles.

11. The shock-absorbing pad according to claim 1, characterized in that, The second wear-resistant layer (4) is provided with a plurality of polygonal pyramids (7) on the side facing the damping layer (3). The axial height of the plurality of polygonal pyramids (7) is less than the axial height of the damping layer (3), and the plurality of polygonal pyramids (7) are inserted into the damping layer (3).

12. An electric motor, characterized in that, It includes a rotating shaft (8) and a damping pad (9) according to any one of claims 1 to 11, the damping pad (9) being sleeved on the rotating shaft (8).

13. A fan, characterized in that, The device includes a fan blade and the motor as described in claim 12. The fan blade includes a fan blade mounting part (10). A retaining ring (11), a flat washer (12), an elastic washer (13), and a nut (14) are provided on the rotating shaft (8). The flat washer (12), the shock-absorbing washer (9), the fan blade mounting part (10), the flat washer (12), and the elastic washer (13) are sequentially arranged between the retaining ring (11) and the nut (14).

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