Bearing assembly and fan adopting same

Abstract

The invention provides a bearing assembly and a fan adopting the bearing assembly, and belongs to the technical field of bearing parts, the bearing assembly comprises a rotating unit, a wrapping unit and an adjusting unit, the rotating unit comprises an upper driving shaft, a lower driving shaft and a flexible structure fixedly connected between the upper driving shaft and the lower driving shaft, and the wrapping unit is connected with the flexible structure. The flexible structure comprises flexible sleeves and spokes arranged between the flexible sleeves, and variable cavities are formed in the spokes; the wrapping unit comprises a fixed cover arranged on the periphery of the upper driving shaft at intervals, a shaft sleeve arranged between the fixed cover and the periphery of the upper driving shaft and a plugging structure arranged at an opening of the fixed cover, the shaft sleeve is fixedly connected with the inner wall of the fixed cover, and the plugging structure abuts against the lower driving shaft; the adjusting unit comprises a balance weight structure arranged in the variable cavity in a sliding mode and a displacement structure in transmission connection with the balance weight structure, and the displacement structure is used for moving the balance weight structure. According to the invention, noise is reduced.

Description

Technical Field

[0001] This invention belongs to the technical field of bearing parts, specifically relating to a bearing assembly and a fan using the bearing assembly. Background Technology

[0002] Among various ventilation and heat dissipation equipment, fans are the core components that drive airflow, and they are widely used in computer cooling, home appliances, industrial equipment, and even transportation vehicles (such as car seat ventilation systems). A typical fan usually consists of a motor-driven shaft, a bearing assembly supporting the shaft, and a housing that houses these components. The performance and structure of the bearing assembly directly affect the fan's operational smoothness, noise level, and lifespan.

[0003] Currently, common fan bearing assembly designs focus on ensuring the radial and axial positioning accuracy and load-bearing capacity of the shaft. The shaft is usually pressed directly into or fixed in a rigid bearing housing, which is typically rigidly connected to the fan housing (or frame) or is itself part of the housing structure. This rigid support system ensures structural stability.

[0004] However, when a fan operates at high speed, it inevitably generates a certain amount of mechanical vibration due to factors such as uneven electromagnetic force of the motor, slight deviations in the dynamic balance of the shaft assembly, or minor disturbances in the bearing itself. In a traditional rigid connection structure, these vibrations originating from the shaft and bearings are transmitted to the entire fan housing with almost no attenuation, resulting in a high level of noise. Summary of the Invention

[0005] This invention provides a bearing assembly and a fan using the bearing assembly, aiming to solve the technical problem of high noise during the operation of the bearing assembly.

[0006] In a first aspect, embodiments of the present invention provide a bearing assembly, comprising:

[0007] A rotating unit includes an upper drive shaft, a lower drive shaft, and a flexible structure fixed between the upper drive shaft and the lower drive shaft. The flexible structure includes a flexible sleeve and spokes disposed between the flexible sleeves. A variable cavity is formed in the spokes.

[0008] The enclosure unit includes a fixed cover spaced apart from the outer periphery of the upper drive shaft, a bushing disposed between the fixed cover and the outer periphery of the upper drive shaft, and a sealing structure disposed at the opening of the fixed cover. The bushing is fixedly connected to the inner wall of the fixed cover, and the sealing structure abuts against the lower drive shaft.

[0009] The adjustment unit includes a counterweight structure slidably disposed within the variable cavity and a displacement structure drively connected to the counterweight structure, the displacement structure being used to move the counterweight structure within the variable cavity.

[0010] In conjunction with the first aspect, in one possible implementation, the counterweight structure includes:

[0011] Two counterweight plates are arranged opposite each other, forming a counterweight area between the two counterweight plates. An annular compensation groove is formed on the outer periphery of each counterweight plate. A compensation airbag and a compensation component connected to the compensation airbag are provided in the compensation groove. The compensation component is used to inflate or de-inflate the compensation airbag.

[0012] An elastic element is fixed between the two counterweight plates and has a preload force that brings the two counterweight plates closer together.

[0013] Material box, located inside the flexible sleeve; and

[0014] A feeding mechanism is connected to the material bin and the counterweight area, and is used to transfer materials between the material bin and the counterweight area.

[0015] In conjunction with the first aspect, in one possible implementation, an isolation unit is provided between the two counterweight plates;

[0016] The isolation unit includes:

[0017] An isolation bladder, fixedly connected between the two counterweight plates, is also spaced and sleeved around the outer periphery of the elastic member; and

[0018] An isolation element is connected to the interior of the isolation bladder and is used to inflate or de-inflate the isolation bladder.

[0019] In conjunction with the first aspect, in one possible implementation, the opposite side of the two counterweight plates is a displacement region, and the displacement structure includes a displacement member communicating with the displacement region, the displacement member inflating or deflating the displacement region.

[0020] In conjunction with the first aspect, in one possible implementation, the spokes are S-shaped, and the thickness of the spokes gradually decreases from the ends to the middle.

[0021] In conjunction with the first aspect, in one possible implementation, the outer periphery of the upper drive shaft is spirally provided with a circulation groove;

[0022] The bearing assembly also includes a circulation unit;

[0023] The loop unit includes:

[0024] A circulation seat, slidably disposed on the inner wall of the bushing, the circulation seat being movable axially along the upper drive shaft; and

[0025] A circulation lever is connected to the circulation seat and is adapted to the circulation groove.

[0026] In conjunction with the first aspect, in one possible implementation, the circulation seat has a groove for the circulation lever to slide in, and the circulation unit further includes a pneumatic component communicating with the groove and a deformation component fixed between the circulation seat and the circulation lever. The pneumatic component is used to inflate or de-inflate the groove, and the deformation component has a preload force that causes the circulation lever to extend out of the groove.

[0027] In conjunction with the first aspect, in one possible implementation, the circulating paddle block has an oil replenishment chamber, and the bearing assembly further includes an oil replenishment unit. The oil replenishment unit includes an oil replenishment tank disposed within the flexible sleeve, an oil replenishment pipe connecting the oil replenishment chamber and the oil replenishment chamber, and an oil replenishment component disposed on the oil replenishment pipe. The oil replenishment component is used to draw lubricating oil from the oil replenishment tank.

[0028] In conjunction with the first aspect, in one possible implementation, the blocking structure includes:

[0029] An elastic pad is fixed to the opening of the fixing cover; and

[0030] A wear-resistant pad is fixed to the side of the elastic pad facing the lower drive shaft, and the wear-resistant pad abuts against the lower drive shaft.

[0031] Compared with the prior art, the bearing assembly provided in this application flexibly connects the rotating unit (upper / lower drive shaft) and the fixed enclosure unit (fixed cover) by setting a flexible structure including a flexible sleeve and spokes. This effectively absorbs and isolates the vibration generated by rotation, preventing it from being directly transmitted to the outer shell and fundamentally reducing noise. At the same time, by adjusting the counterweight structure in the variable cavity of the unit, the mass distribution of the rotating body can be adjusted in real time or under specific working conditions to actively compensate for the imbalance, thereby suppressing vibration from the source. It is especially suitable for balance shifts that may occur after changes in rotational speed or long-term operation.

[0032] Secondly, embodiments of the present invention also provide a fan, including a housing, an impeller rotatably connected within the housing, a bearing assembly drively connected to the impeller, and a drive mechanism for driving the rotating unit to rotate. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the bearing assembly according to an embodiment of the present invention;

[0034] Figure 2 This is a schematic diagram illustrating the rotating unit and the sealing structure in an embodiment of the present invention;

[0035] Figure 3 This is a schematic diagram illustrating the internal structure of the flexible sleeve in an embodiment of the present invention;

[0036] Figure 4 This is a schematic diagram illustrating the counterweight structure in an embodiment of the present invention;

[0037] Figure 5 This is a partial cross-sectional view illustrating the isolation capsule in an embodiment of the present invention;

[0038] Figure 6 This is a cross-sectional view illustrating the loop unit in an embodiment of the present invention;

[0039] Figure 7 for Figure 6 A magnified view of part A in the middle;

[0040] Figure 8 This is an unfolded diagram illustrating the circulation tank path in an embodiment of the present invention;

[0041] Figure 9 This is a schematic diagram of the fan structure according to an embodiment of the present invention;

[0042] Figure 10 This is a schematic diagram illustrating the installation of the drive mechanism and impeller in an embodiment of the present invention.

[0043] Explanation of reference numerals in the attached figures:

[0044] 10. Rotating unit; 101. Upper drive shaft; 1011. Circulation groove; 102. Lower drive shaft; 103. Flexible sleeve; 104. Spoke;

[0045] 20. Enclosure unit; 201. Fixing cover; 202. Bushing; 203. Elastic pad; 204. Wear-resistant sheet;

[0046] 30. Adjustment unit; 301. Counterweight plate; 3011. Compensation groove; 3012. Compensation airbag; 302. Elastic component; 303. Material box;

[0047] 40. Isolation unit; 401. Isolation capsule;

[0048] 50. Circulation unit; 501. Circulation seat; 5011. Slide groove; 502. Circulation lever; 5021. Oil filling chamber; 503. Deformation component;

[0049] 60. Fuel replenishment unit; 601. Fuel replenishment tank;

[0050] 70. Casing; 701. Impeller; 702. Drive mechanism. Detailed Implementation

[0051] To make the technical problems to be solved, the technical solutions, and the beneficial effects of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0052] Please refer to the following: Figures 1 to 8 The bearing assembly of the present invention will be described below. A bearing assembly includes a rotating unit 10, a wrapping unit 20, and an adjusting unit 30. The rotating unit 10 includes an upper drive shaft 101, a lower drive shaft 102, and a flexible structure fixed between the upper drive shaft 101 and the lower drive shaft 102. The flexible structure includes a flexible sleeve 103 and spokes 104 disposed between the flexible sleeves 103, with a variable cavity formed within each spoke 104. The wrapping unit 20 includes a fixed cover 201 spaced around the outer periphery of the upper drive shaft 101, a bushing 202 disposed between the fixed cover 201 and the outer periphery of the upper drive shaft 101, and a sealing structure disposed at the opening of the fixed cover 201. The bushing 202 is fixedly connected to the inner wall of the fixed cover 201, and the sealing structure abuts against the lower drive shaft 102. The adjusting unit 30 includes a counterweight structure slidably disposed within the variable cavity and a displacement structure drively connected to the counterweight structure. The displacement structure is used to move the counterweight structure within the variable cavity.

[0053] Compared with the prior art, the bearing assembly provided in this embodiment, when the upper drive shaft 101 and the lower drive shaft 102 are driven to rotate, the vibration caused by manufacturing tolerances, uneven electromagnetic force, or load changes will first be transmitted to the flexible structure connecting them. The spokes 104 in this flexible structure can undergo controllable elastic deformation, converting the mechanical energy of the vibration into its own strain energy and dissipating it, thereby effectively blocking the rigid transmission path of vibration to the external fixed cover 201 and the entire assembly, achieving passive vibration isolation. At the same time, the adjustment unit 30 integrated in the variable cavity of the spokes 104 activates its active control function: the displacement structure receives signals from the vibration monitoring system (or preset program), drives the counterweight structure to move in the variable cavity, and changes the mass distribution and moment of inertia of the rotating unit 10 in real time, actively counteracting the unbalanced force and torque caused by mass eccentricity or changes in working conditions. The passive vibration absorption of the flexible structure and the active vibration suppression of the adjustment unit 30 complement each other to form a dynamic adaptive system, which enables the rotating shaft system to maintain high dynamic balance accuracy during operation. This significantly suppresses the generation and propagation of vibration and noise from both the source and path dimensions, thereby reducing noise.

[0054] In some embodiments, see Figure 3 and Figure 4The counterweight structure includes two counterweight plates 301, an elastic element 302, a material box 303, and a feeding mechanism. The two counterweight plates 301 are arranged opposite each other, forming a counterweight area between them. An annular compensation groove 3011 is formed on the outer periphery of each counterweight plate 301. A compensation airbag 3012 and a compensation element connected to the compensation airbag 3012 are provided within the compensation groove 3011. The compensation element is used to inflate or deflate the compensation airbag 3012 to compensate for air loss. The component is a pneumatic component; the elastic component 302 is fixed between the two counterweight plates 301 and has a preload force that brings the two counterweight plates 301 closer to each other. The elastic component 302 is a spring; the material box 303 is located inside the flexible sleeve 103; the feeding mechanism is connected to the material box 303 and the counterweight area and is used to transfer materials between the material box 303 and the counterweight area. The feeding mechanism includes a feeding pipe and a feeding pump located in the feeding pipe. This is prior art and will not be described in detail in this application.

[0055] It should be noted that the spokes 104 are hollow, and the counterweight structure is located inside the spokes 104.

[0056] The displacement structure can relocate the entire counterweight structure; or the feeding mechanism can be activated to quantitatively transport or extract high-density counterweight material (such as metal particles or fluid) stored in the material box 303 to the counterweight area, directly and significantly increasing or decreasing the local mass. By changing the weight of the counterweight area and its position within the variable cavity, different speeds and load conditions can be adapted.

[0057] The elastic element 302 not only provides a restoring force for the relative movement of the counterweight plate 301, but also works in conjunction with the variable volume compensation airbag 3012 to form an internal subsystem with elastic damping characteristics, further assisting in the dissipation of vibration energy.

[0058] The compensation component fills or releases the gas contained in the compensation airbag 3012, causing the compensation airbag 3012 to expand or contract, so that the counterweight plate 301 can fit against the inner wall of the variable cavity regardless of the position of the counterweight structure in the variable cavity.

[0059] In some embodiments, see Figure 5 An isolation unit 40 is provided between the two counterweight plates 301. The isolation unit 40 includes an isolation bladder 401 and an isolation component; the isolation bladder 401 is fixed between the two counterweight plates 301, and the isolation bladder 401 is also spaced around the outer periphery of the elastic component 302; the isolation component is connected to the inside of the isolation bladder 401 and is used to inflate or de-inflate the isolation bladder 401, and the isolation component is an air pump.

[0060] When the feeding mechanism is activated to transfer the counterweight material to the counterweight area, the distance between the two counterweight plates 301 increases; when the feeding mechanism pneumatically transfers the counterweight material in the counterweight area to the material box 303, the distance between the two counterweight plates 301 decreases.

[0061] The length of the isolation bladder 401 meets the maximum distance between the two counterweight plates 301. After the isolation bladder 401 is inflated by the isolation member, the isolation bladder 401 expands, causing the inner wall of the isolation bladder 401 to separate from the elastic member 302. At this time, the counterweight material in the counterweight area will not compress the elastic member 302, thereby protecting the elastic member 302.

[0062] In some embodiments, the opposite sides of the two counterweight plates 301 are a displacement region, and the displacement structure includes a displacement member connected to the displacement region, which inflates or deflates the displacement region.

[0063] When the system detects the need to adjust the counterweight to compensate for imbalance in a specific direction, the displacement component (typically a micro-pump or a solenoid valve-controlled pneumatic system) initiates its operating procedure, performing differentiated pneumatic pressure operations on the target displacement area: air is pumped out to create a local negative pressure in the displacement area where the desired counterweight plate 301 is to be moved, while air is pumped in to establish a positive pressure in the displacement area on the other side. This generates a controllable pressure gradient on the back surfaces of the two counterweight plates 301. This pressure difference acts directly on the effective working area of ​​the counterweight plates 301, forming an axial driving force that propels the counterweight structure, thereby driving the counterweight plates 301 to move smoothly and precisely within the variable cavity.

[0064] This pure pneumatic drive method eliminates traditional mechanical transmission components such as screws, gears, or linear motors, achieving contactless transmission. It completely eliminates the additional resistance, vibration, and reliability problems caused by mechanical contact, wear, or jamming, making the counterweight adjustment process smoother, faster in response, and almost without additional vibration.

[0065] In some embodiments, see Figure 3 The spokes 104 are S-shaped, and the thickness of the spokes 104 gradually decreases from the end to the middle.

[0066] When the rotating unit 10 operates and generates multi-directional composite vibration, the stress is first transmitted to the connection between the spokes 104 and the upper drive shaft 101 and the lower drive shaft 102. The S-shaped meandering geometric path significantly increases the effective deformation length of the spokes 104 in the limited axial space, so that the vibration energy can be more fully dispersed and absorbed along this extended path.

[0067] Meanwhile, the thickness design that gradually thins from the connection points at both ends to the central region creates an elastic body with gradient stiffness: the thicker ends ensure the rigidity and structural reliability of the connection with the drive shaft and flexible sleeve 103, while the central region, which gradually thins to the thinnest point, becomes the main control area for the flexible deformation of the entire spoke 104. This region has the lowest bending stiffness and can preferentially undergo large-amplitude elastic bending and torsional deformation under radial, axial and even torsional loads.

[0068] The combination of this S-curve-guided multi-directional deformation capability and gradient stiffness design enables the spokes 104 to not only adapt to vibration excitation of different frequencies and directions like a series of micro-arc beams, but more importantly, the concentrated flexible deformation at its thinnest section can efficiently convert mechanical kinetic energy into elastic potential energy in a highly controllable manner, and dissipate it as heat energy through the internal friction effect inside the material, rather than transferring it to the external structure.

[0069] Therefore, the optimized spoke 104, as the core force-bearing element of the flexible structure, realizes a qualitative change from rigid connection to directional flexible connection, transforming discrete vibration impact into a smooth and continuous elastic deformation process, which greatly improves the passive isolation and attenuation efficiency of the bearing assembly against broadband vibration.

[0070] In some embodiments, see Figure 6 The upper drive shaft 101 has a spirally formed circulation groove 1011 on its outer periphery, and the circulation groove 1011 is connected end to end. The bearing assembly also includes a circulation unit 50; the circulation unit 50 includes a circulation seat 501 and a circulation lever 502; the circulation seat 501 is slidably disposed on the inner wall of the bushing 202, and the circulation seat 501 moves axially along the upper drive shaft 101; the circulation lever 502 is connected to the circulation seat 501 and is adapted to the circulation groove 1011.

[0071] When the upper drive shaft 101 rotates at high speed, the circulation groove 1011 spirally opened on its outer circumference continuously meshes with the circulation block 502 sliding on the inner wall of the bushing 202. The circulation block 502 cannot rotate with it under the constraint of the spiral surface of the circulation groove 1011, but converts the rotational motion into a periodic axial thrust along the spiral direction of the circulation groove 1011. This thrust is directly transmitted to the circulation seat 501 connected to the circulation block 502, forcing the circulation seat 501 to overcome the frictional damping in the bushing 202 and strictly follow the guiding law of the spiral groove to make precise reciprocating linear motion in the axial direction of the upper drive shaft 101.

[0072] This reciprocating motion has a dual core function: First, the regular shuttle movement of the circulation seat 501 and its associated structures within the bushing 202 acts like a dynamic piston, continuously agitating and pushing the lubricating oil stored in the gap between the bushing 202 and the upper drive shaft 101. This disrupts uneven oil film distribution or localized voids that may result from centrifugal force or static placement, forcing the lubricating oil to form directional flow and exchange between the key contact areas of the friction pair. This ensures that the bearing contact surface is always fully wetted, significantly reducing the coefficient of friction, reducing wear, and enhancing heat dissipation. Second, the circulation seat 501 itself, as a moving part with considerable mass, generates an inertial force related to the rotational frequency through its regular axial reciprocating motion. This inertial force is fed back to the bearing support system through the connection point between the circulation seat 501 and the bushing 202. When the frequency and phase of this inertial force are properly designed, it can effectively counteract or weaken radial or axial vibrations of a specific frequency from the rotating unit 10, thus forming an additional passive vibration damping element based on momentum modulation.

[0073] Therefore, the circulation unit 50 not only solves the problem of traditional static oil bath or grease lubrication being prone to failure at high speeds, but also upgrades the simple lubrication function into a comprehensive performance enhancement system that integrates active lubrication, enhanced heat dissipation and auxiliary dynamic vibration reduction. Working together with the flexible structure and adjustment unit 30, it improves the overall operational stability and durability of the bearing assembly under complex working conditions such as high speed and variable load.

[0074] In some embodiments, see Figure 7 The circulation seat 501 has a groove 5011 for the circulation lever 502 to slide. The circulation unit 50 also includes a pneumatic component connected to the groove 5011 and a deformation component 503 fixed between the circulation seat 501 and the circulation lever 502. The pneumatic component is used to inflate or de-inflate the groove 5011, and the deformation component 503 has a preload force that causes the circulation lever 502 to extend out of the groove 5011.

[0075] It should be noted that a sealing gasket is provided on the outer periphery of the circulation block 502 or on the inner wall of the slide groove 5011, and between the circulation block 502 and the inner wall of the slide groove 5011.

[0076] Under system default or non-high load conditions, the pneumatic components remain unpressurized. At this time, the deformable component 503 (such as a disc spring or elastomer) fixed between the circulation seat 501 and the circulation block 502 uses its preset preload force to stably push the circulation block 502 out of the slide groove 5011, so that the end of the circulation block 502 is fully inserted into the circulation groove 1011.

[0077] After the gas in the slide groove 5011 is extracted by the pneumatic component, a negative pressure is formed in the slide groove 5011, thereby moving the circulation block 502 into the slide groove 5011, thereby adjusting the depth of the circulation block 502 inserted into the circulation groove 1011, thus realizing stepless precise control from "full engagement forced circulation" to "partial engagement adjustment circulation" and even "complete separation".

[0078] By precisely controlling the negative pressure value within the slide groove 5011, the system can linearly control the degree to which the preload of the deformable part 503 is offset, thereby stabilizing the circulating block 502 at any intermediate position within the slide groove 5011, allowing its end to engage with the circulating groove 1011 at a variable depth.

[0079] When it is necessary to minimize operating resistance or when the system enters standby mode, the pneumatic components can further increase the negative pressure, completely retracting the circulation block 502 into the slide groove 5011 to achieve zero contact. This mechanism based on precise negative pressure adjustment makes the intensity of the lubrication cycle no longer fixed, but an adaptive variable that dynamically matches the bearing's real-time temperature, vibration spectrum, and load conditions. While ensuring that key friction pairs always receive the necessary lubrication, it minimizes unnecessary mechanical friction losses and drive power consumption, achieving an intelligent balance between efficiency and energy consumption.

[0080] In some embodiments, see Figures 6 to 8 The circulating block 502 has an oil replenishment chamber 5021. The bearing assembly also includes an oil replenishment unit 60. The oil replenishment unit 60 includes an oil replenishment tank 601 located in the flexible sleeve 103, an oil replenishment pipe connecting the oil replenishment chamber 5021 and the oil replenishment chamber 5021, and an oil replenishment component located in the oil replenishment pipe. The oil replenishment component is used to draw lubricating oil from the oil tank.

[0081] It should be noted that the connection between the oil replenishment pipe and the oil replenishment tank 601 can be made by a rotary joint, so that the oil replenishment pipe does not rotate with the oil replenishment tank 601. This is prior art and will not be described in detail in this application.

[0082] When the circulation block 502 is in motion, the oil replenishment chamber 5021 located inside the circulation block 502 moves synchronously; at the same time, the oil replenishment component (such as a micro piezoelectric pump or electromagnetic metering pump) is activated according to a preset program or feedback signal from the oil level and temperature sensor, and draws lubricating oil from the oil replenishment tank 601 and delivers it to the oil replenishment chamber 5021 in dynamic motion through the oil replenishment pipe.

[0083] The oil replenishment chamber 5021 is not a closed container. Its chamber wall is designed with micro-pores or micro-valve structures that open under pressure facing the meshing working surface of the circulation block 502 and the circulation groove 1011. As the circulation block 502 slides back and forth under the drive of the circulation groove 1011 and is subjected to periodic lateral pressure, the lubricating oil in the oil replenishment chamber 5021 is continuously and slowly seeped out through these micro-channels under the dual action of mechanical extrusion of the chamber wall and the inertial force of the lubricating oil itself, and is directly coated on the meshing contact surface of the circulation groove 1011 and the block, as well as the adjacent upper drive shaft 101 journal surface.

[0084] This process achieves targeted and precise delivery of lubricating oil, directly replenishing it to the core friction pair interface most prone to oil film loss and wear due to high-speed relative motion. The oil replenishment unit 60 works synergistically with forced circulation lubrication: the circulation motion rapidly diffuses the newly replenished lubricating oil to form a uniform oil film, while the oil replenishment unit 60 continuously compensates for unavoidable lubricant consumption and degradation during operation. Together, they maintain a dynamically stable and long-term reliable optimal lubrication state, significantly reducing frictional heating, abnormal wear, and resulting vibration and noise caused by insufficient lubrication, and significantly improving the durability and stability of the bearing assembly under maintenance-free or long-maintenance cycles.

[0085] In some embodiments, see Figure 1 and Figure 2 The sealing structure includes an elastic pad 203 and a wear-resistant plate 204; the elastic pad 203 is fixed to the opening of the fixed cover 201; the wear-resistant plate 204 is fixed to the side of the elastic pad 203 facing the lower drive shaft 102, and the wear-resistant plate 204 abuts against the lower drive shaft 102.

[0086] With its inherent high elasticity and deformation recovery capability, the elastic pad 203 fits tightly against the surface of the high-speed rotating lower drive shaft 102, forming a following flexible sealing ring. When the lower drive shaft 102 experiences momentary displacement due to minute radial runout, axial movement, or transmitted vibration during operation, the elastic pad 203 can undergo local compression or stretching deformation. This effectively absorbs and converts the mechanical impact transmitted from the lower drive shaft 102 into elastic potential energy while maintaining a contact seal to prevent external dust from entering the bearing. The energy is then dissipated into a small amount of heat energy through the internal friction of the material, achieving primary vibration isolation.

[0087] The wear-resistant plate 204 serves as the interface layer that directly slides in contact with the lower drive shaft 102. It is made of a special material with a low coefficient of friction and high wear resistance. Based on the flexible support provided by the elastic pad 203, it forms a sliding pair with the rotating shaft surface with extremely low frictional resistance and exceptional stability. This not only greatly reduces the frictional power consumption and heat generation of the sealing structure itself, and avoids the rapid wear and aging of the elastic pad 203 due to direct friction, but more importantly, its hard surface and stable frictional characteristics ensure that the sealing gap remains constant during long-term high-speed operation of the shaft, thereby maintaining a durable and consistent sealing and damping effect.

[0088] Therefore, the entire sealing structure is not a passive static seal, but a dynamic adaptive damping seal module that can actively adapt to the movement of the shaft, isolate external contaminants and suppress the transmission of internal vibrations outward. It echoes the flexible structure and adjustment unit 30 inside the bearing assembly, together forming a comprehensive and multi-layered vibration reduction and noise reduction and protection system.

[0089] Based on the same inventive concept, see [link to inventive concept] Figure 9 and Figure 10 This application also provides a fan, including a housing 70, an impeller 701 rotatably connected to the housing 70, a bearing assembly transmissionally connected to the impeller 701, and a drive mechanism 702 for driving the rotating unit 10 to rotate. The drive mechanism 702 includes a stator, a rotor, a magnetic ring, and a PCB circuit board, which are prior art and will not be described in detail in this application.

[0090] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A bearing assembly, characterized in that, include: A rotating unit includes an upper drive shaft, a lower drive shaft, and a flexible structure fixed between the upper drive shaft and the lower drive shaft. The flexible structure includes a flexible sleeve and spokes disposed between the flexible sleeves. A variable cavity is formed in the spokes. The packaging unit includes a fixed cover spaced apart on the outer periphery of the upper drive shaft, a bushing disposed between the fixed cover and the outer periphery of the upper drive shaft, and a sealing structure disposed at the opening of the fixed cover. The bushing is fixedly connected to the inner wall of the fixed cover, and the sealing structure abuts against the lower drive shaft. as well as The adjustment unit includes a counterweight structure slidably disposed within the variable cavity and a displacement structure drively connected to the counterweight structure, the displacement structure being used to move the counterweight structure within the variable cavity.

2. The bearing assembly as claimed in claim 1, characterized in that, The counterweight structure includes: Two counterweight plates are arranged opposite each other, forming a counterweight area between the two counterweight plates. An annular compensation groove is formed on the outer periphery of each counterweight plate. A compensation airbag and a compensation component connected to the compensation airbag are provided in the compensation groove. The compensation component is used to inflate or de-inflate the compensation airbag. An elastic element is fixed between the two counterweight plates and has a preload force that brings the two counterweight plates closer together. Material box, located inside the flexible sleeve; and A feeding mechanism is connected to the material bin and the counterweight area, and is used to transfer materials between the material bin and the counterweight area.

3. The bearing assembly as described in claim 2, characterized in that, An isolation unit is provided between the two counterweight plates; The isolation unit includes: An isolation bladder, fixedly connected between the two counterweight plates, is also spaced and sleeved around the outer periphery of the elastic member; and An isolation element is connected to the interior of the isolation bladder and is used to inflate or de-inflate the isolation bladder.

4. The bearing assembly as described in claim 2, characterized in that, The two counterweight plates are positioned opposite each other on one side as a displacement region. The displacement structure includes a displacement member connected to the displacement region, which inflates or deflates the displacement region.

5. The bearing assembly as claimed in claim 1, characterized in that, The spokes are S-shaped, and the thickness of the spokes gradually decreases from the ends to the middle.

6. The bearing assembly as claimed in claim 1, characterized in that, The outer circumference of the upper drive shaft is spirally provided with a circulation groove; The bearing assembly also includes a circulation unit; The loop unit includes: A circulation seat, slidably disposed on the inner wall of the bushing, the circulation seat being movable axially along the upper drive shaft; and A circulation lever is connected to the circulation seat and is adapted to the circulation groove.

7. The bearing assembly as claimed in claim 6, characterized in that, The circulation seat has a groove for the circulation lever to slide. The circulation unit also includes a pneumatic component connected to the groove and a deformation component fixed between the circulation seat and the circulation lever. The pneumatic component is used to inflate or de-inflate the groove, and the deformation component has a preload force that causes the circulation lever to extend out of the groove.

8. The bearing assembly as claimed in claim 7, characterized in that, The circulating paddle block has an oil replenishment chamber, and the bearing assembly also includes an oil replenishment unit. The oil replenishment unit includes an oil replenishment tank located inside the flexible sleeve, an oil replenishment pipe connecting the oil replenishment chamber and the oil replenishment chamber, and an oil replenishment component located on the oil replenishment pipe. The oil replenishment component is used to draw lubricating oil from the oil replenishment tank.

9. The bearing assembly as claimed in claim 1, characterized in that, The sealing structure includes: An elastic pad is fixed to the opening of the fixing cover; and A wear-resistant pad is fixed to the side of the elastic pad facing the lower drive shaft, and the wear-resistant pad abuts against the lower drive shaft.

10. A fan comprising a bearing assembly as described in any one of claims 1-9, characterized in that, It includes a housing, an impeller rotatably connected within the housing, a bearing assembly drively connected to the impeller, and a drive mechanism for driving the rotating unit to rotate.

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