A brush misconnection type stator electrode structure and electrostatic fan

Abstract

The utility model belongs to electrostatic motor technical field especially relates to a kind of brush misplacement connection type stator electrode structure and electrostatic fan, the brush misplacement connection type stator electrode structure includes the multiple stator electrode plates arranged in circumferential direction, electrode plate outer surface is covered with insulating layer, only in brush contact area forms conductive bare surface, adjacent brush is set up in axial up and down misplacement, and up and down two ends are fixed between the upper frame and lower frame coaxially arranged, and support hole for installing rotating shaft is formed by center connecting rod. The present application increases contact distance by brush misplacement arrangement, avoids discharge breakdown, improves voltage resistance performance in combination with insulating coating structure, so that rotor rotates stably under high voltage condition, and it is applicable to high-efficiency electrostatic motor and fan system.

Description

Technical Field

[0001] This utility model belongs to the field of electrostatic motor technology, and particularly relates to a stator electrode structure with staggered brush connection and an electrostatic fan. Background Technology

[0002] As a core component for converting mechanical energy into electrical energy, electric motors are widely used in industrial production, electronic equipment, and aerospace. Traditional electric motors mostly operate based on the principle of electromagnetic induction, generating a magnetic field by current flowing through coils and then using Lorentz force to drive the rotor to rotate. Although electromagnetic motor technology is mature and has a large output torque, it inevitably generates resistance loss, hysteresis loss, and eddy current loss during operation, resulting in decreased energy utilization efficiency and continuous heat generation of the motor body. Especially in power-sensitive scenarios such as cooling fans of electronic devices and micro actuators, electromagnetic motors cannot meet the requirements of modern high-performance electronic devices for efficient heat dissipation and low-energy-consumption drive due to problems such as severe heat generation, high noise, and complex structure that makes further miniaturization difficult.

[0003] To overcome the technical limitations of electromagnetic motors in terms of high loss, high heat generation, and difficulty in miniaturization, electrostatic motors, as a novel driving method that utilizes the Coulomb force between electrostatic fields to achieve energy conversion, have gradually attracted attention. This type of motor transfers charges by applying a high-voltage electric field between the stator and rotor electrodes, thereby achieving the driving effect of like charges repelling and unlike charges attracting. Compared with electromagnetic structures, it does not require coil windings and iron core components, thus eliminating resistance losses caused by current flowing through conductors and hysteresis and eddy current losses caused by changes in the magnetic field. This gives it significant advantages in energy conversion efficiency, operating temperature rise, and noise control, making it suitable for use in electronic devices with limited size, sensitive heat dissipation, and strictly controlled power consumption. Some existing technologies have disclosed the use of electrostatic motors to drive cooling fan structures to replace traditional electromagnetic fans, enabling continuous airflow output at lower power consumption to meet local heat dissipation needs.

[0004] However, existing electrostatic motors still face key bottlenecks in their structural design that restrict performance improvement. Among these, the most prominent issues are insufficient insulation protection of the stator electrodes and unreasonable arrangement of the brush conductive structure. Existing electrostatic motors generally adopt a layout where the stator electrode plates are completely exposed to the environment. The stator electrode plates are usually arranged in alternating positive and negative pole pairs along the circumference. A driving electric field is constructed by applying high voltage DC to the entire stator. Since the surface of the stator electrode plates is not insulated or only treated with a simple coating in local areas, the air in the electrode gaps is easily ionized under high voltage to form conductive channels, leading to frequent electric field breakdown. To avoid breakdown, it is usually necessary to increase the spacing between adjacent stator electrode plates. However, in applications with extremely limited installation space, such as cooling fans for electronic equipment, increasing the stator electrode spacing directly reduces the number of stators per unit circumferential length, thereby reducing the electrostatic field area and thus reducing the electrostatic force output on the rotor, limiting further increases in fan speed.

[0005] Furthermore, existing electrostatic motors typically use a sliding contact method between brushes and conductive plates for commutation to achieve charge transfer between the stator and rotor. Some existing technologies uniformly place the brushes in the axial center of the stator structure to achieve concentrated conductivity of the rotor electrodes. However, this arrangement can easily lead to unstable contact between the brushes and rotor conductive plates under high-voltage operating conditions. Changes in contact resistance can cause fluctuations in charge transfer efficiency, triggering electric spark discharge or even local overheating. Moreover, the concentrated arrangement of brushes at a single height may also lead to uneven electric field distribution in the vertical direction of the stator electrode plates, resulting in excessively high electric field strength in local areas and exacerbating the risk of air breakdown. This further limits the maximum operating voltage that the electrostatic motor can withstand, making it difficult to meet the requirements for increasing fan speed and air pressure.

[0006] Therefore, how to overcome the breakdown problem caused by the exposed stator electrodes and brush installation method of existing electrostatic motors, and effectively increase the working voltage to improve fan speed and air pressure, has become an urgent technical problem to be solved in the field of electrostatic motors and electrostatic fans. Utility Model Content

[0007] In existing electrostatic fans, the brushes are concentrated on the same plane, and the contact points are too close together. This makes them prone to corona discharge or arcing during high-voltage operation. Furthermore, the electrode plates are often exposed, making them susceptible to leakage in humid or dusty environments, resulting in unstable operation under high voltage. This application aims to solve the problems of insufficient brush withstand voltage and unstable charge transfer. It discloses a staggered brush connection stator electrode structure and an electrostatic fan. By using staggered brush arrangement, insulated electrode plates, angled installation, and a double-ring supported shaft structure, the brush contact distance is increased, electric field leakage is reduced, and rotor stress is stabilized, enabling the electrostatic fan to operate safely and stably even at higher voltages.

[0008] The first objective of this application is to disclose a stator electrode structure with misaligned brush connections, comprising: The stator frame is used to support and fix the stator electrode plate; Multiple stator electrode plates are arranged alternately as positive and negative pole pairs along the circumference of the stator frame. The brushes are mounted on the stator electrode plate for electrical connection with the rotor conductive plates of the rotor assembly. Adjacent brushes are staggered vertically in the axial direction of the stator frame.

[0009] In some examples of this application, the stator electrode plate includes an electrode plate body, the electrode plate body including an insulating portion with an outer surface covered with insulating material and a brush contact area without insulating material, the brush being mounted in the brush contact area.

[0010] In some examples of this application, a brush is provided on the electrode plate body of each of the stator electrode plates, and the brush contact areas of two adjacent electrode plates are located at the upper and lower ends of the electrode plate body, respectively.

[0011] In some examples of this application, the stator frame includes an upper frame and a lower frame arranged in a ring. The upper frame and the lower frame are coaxial and parallel. The upper and lower ends of the stator electrode plates are fixedly connected between the upper frame and the lower frame, so that each stator electrode plate is vertically spaced along the circumference.

[0012] In some examples of this application, the stator electrode plate is divided into a positive electrode group and a negative electrode group. The positive electrode group includes a plurality of positive electrode plates distributed circumferentially at intervals. The negative electrode group includes a number of negative electrode plates equal to the number of positive electrode plates. The positive and negative electrode plates are arranged alternately circumferentially between the upper and lower frames of the stator frame. All positive electrode plates in the positive electrode group are electrically connected to the positive terminal of an external power supply, and all negative electrode plates in the negative electrode group are electrically connected to the negative terminal of an external power supply.

[0013] In some examples of this application, the brushes on all the positive electrode plates in the positive electrode group are arranged at the same height in the axial direction of the stator frame, and the brushes on all the negative electrode plates in the negative electrode group are arranged at the same height in the axial direction of the stator frame.

[0014] In some examples of this application, the extension direction of the stator electrode plate is set at a predetermined angle with the central axis of the connection point between the upper frame and the lower frame.

[0015] In some examples of this application, a plurality of first connecting rods are arranged radially on the inner side of the upper frame, and the plurality of first connecting rods form a first connecting portion with a first connecting hole at the center of the upper frame. Correspondingly, a plurality of second connecting rods are arranged radially on the inner side of the lower frame, and the plurality of second connecting rods form a second connecting portion with a second connecting hole at the center of the lower frame. The first connecting hole and the second connecting hole are coaxially arranged to provide rotational support for the rotating shaft.

[0016] The second objective of this application is to disclose an electrostatic fan, comprising a rotor assembly and a stator assembly arranged coaxially. The stator assembly adopts a stator electrode structure with staggered brush connections as described above. The rotor assembly includes a rotor conductive plate for forming sliding contact with the brush to obtain charge and fan blades connected to the rotor conductive plate. When an external power supply is connected to the positive electrode group and the negative electrode group respectively, the brush transfers charge to the rotor conductive plate, causing the rotor conductive plate to drive the fan blades to rotate around the central axis of the stator assembly under the action of electrostatic repulsion and attraction.

[0017] In some examples of this application, the rotor assembly further includes: A rotor frame that is rotatable about the central axis of the stator assembly and is at least partially located within the stator assembly; Multiple rotor conductive plates are provided and distributed on the circumferential outer side of the rotor frame. During the rotation of the rotor assembly, the rotor conductive plates pass sequentially through the corona regions of the positive and negative electrode plates of the stator assembly. The fan blades are multiple and are integrated with the rotor frame.

[0018] Compared with the prior art, the stator electrode structure with staggered brush connection and the electrostatic fan of this utility model have the following advantages: 1. This application achieves a staggered axial distribution of the brushes on the stator electrode plate, resulting in a stepped arrangement of the positive and negative electrode contact points. This maintains a uniform circumferential distribution while increasing the minimum spacing in three-dimensional space, reducing the peak electric field, suppressing corona discharge and arc jumping, and making the charge transfer process more stable. At the same time, the contact positions are dispersed at different heights, avoiding localized heating caused by concentrated friction, and extending the service life of the brushes.

[0019] 2. This application covers the surface of the stator electrode plate with insulating material, forming a conductive exposed surface only in the brush contact area, so that the non-contact area is completely insulated and isolated, avoiding leakage in humid or dusty environments, allowing the electrode plate spacing to be further reduced, increasing the electrode plate density, forming a multi-electrode electric field in a limited volume, increasing the charge interaction frequency, and resulting in stronger torque output.

[0020] 3. This application adopts a coaxial ring structure for the stator frame with a bearing support hole in the center, so that the shaft is supported at both the top and bottom, preventing rotor eccentricity. Conductive plates are evenly distributed around the rotor and are integrally connected with the fan blades, so that the conductive plates periodically adsorb charges at the brush and immediately convert them into rotational torque, while driving the blades to generate airflow, realizing synchronous output of electrostatic drive and air propulsion, so that the whole machine can maintain stable speed and low noise operation under high pressure. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the electrostatic fan described in an embodiment of the present invention; Figure 2 This is a schematic diagram of the stator electrode structure with staggered brush connection described in an embodiment of the present invention; Figure 3 This is a second-view structural schematic diagram of the stator electrode structure with misaligned brush connection described in an embodiment of this utility model. Figure 4 This is a schematic diagram of the rotor assembly described in an embodiment of the present invention; The markings in the diagram are as follows: 1. Stator frame; 101. Upper frame; 102. First connecting rod; 103. First connecting part; 104. Lower frame; 105. Second connecting rod; 106. Second connecting part; 107. First connecting hole; 108. Second connecting hole; 2. Stator electrode plate; 21. Positive electrode group; 22. Negative electrode group; 201. Electrode plate body; 202. Insulation part; 203. Brush contact area; 3. Brush; 4. Rotor assembly; 401. Rotor frame; 402. Rotor conductive plate; 403. Fan blade; 404. Third connecting part; 5. Shaft; 6. Stator assembly. Detailed Implementation

[0022] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0023] It should be noted that all directional and positional terms used in this utility model, such as "up," "down," "left," "right," "front," "back," "vertical," "horizontal," "inner," "outer," "top," "lower," "lateral," "longitudinal," and "center," are only used to explain the relative positional relationships and connection arrangements between components in a specific state (as shown in the accompanying drawings). They are merely for the convenience of describing this utility model and do not require that this utility model be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on this utility model. Furthermore, descriptions involving "first," "second," etc., in this utility model are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated.

[0024] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0025] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0026] like Figure 1 As shown in the figure, this application discloses a stator electrode structure with staggered brush connection, including: Stator frame 1, used to support and fix stator electrode plate 2; Multiple stator electrode plates 2 are provided and are arranged alternately in positive and negative pairs along the circumference of the stator frame 1. The brush 3 is disposed on the stator electrode plate 2 for electrical connection with the rotor conductive plate 402 of the rotor assembly 4. Two adjacent brushes 3 are staggered vertically in the axial direction of the stator frame 1.

[0027] The stator electrode structure with staggered brush connection disclosed in this application uses a stator frame 1 as the basic supporting component, with several stator electrode plates 2 arranged circumferentially on it. Brushes 3 are arranged on the stator electrode plates 2, each brush 3 facing the rotor assembly 4, facilitating continuous charge transfer during rotor rotation. This application departs from the traditional method of concentrating all brushes at the same height; instead, each brush is arranged at a staggered height according to the polarity of its location on the stator electrode plate 2, resulting in an alternating vertical arrangement that maintains a regular, staggered distribution. This arrangement allows for a uniform distribution of circumferential conductive contact points while creating a stepped, staggered relationship in the axial direction. Compared to the traditional method of closely arranged brushes on the same plane, this effectively increases the minimum distance between adjacent brushes in three-dimensional space without increasing the diameter or thickness of the stator frame. This avoids the localized enhancement of the electric field caused by the concentration of multiple high-voltage contact points, and prevents corona discharge or air breakdown between contact points at the same voltage. It ensures that the charge transfer process remains stable at higher voltages, improving the overall morphological stability of the layout under high-voltage operation. In the example of this application, the staggered amplitude of the brushes 3 on the stator electrode plate 2 can be adjusted as needed to any proportion of the height of the stator electrode plate 2, such as 20% and 80% or 30% and 70%, to adapt to the requirements of different voltage levels.

[0028] The stator electrode structure with staggered brush connection disclosed in this application increases the minimum effective distance between brushes 3 under high voltage by alternating the vertical distribution of adjacent brushes 3 in the axial direction. As the electric field is stretched, its strength decreases, thus significantly improving the pressure resistance of the structure. Higher operating voltages can be applied without changing the original frame size. Under high voltage driving conditions, the charge transfer efficiency is improved, thereby enhancing the electrostatic force output effect and enabling the rotor to obtain a stronger driving torque. At the same time, since the brush contact points are distributed along the axial direction, the probability of local heat accumulation and electric spark generation can be reduced, improving the reliability and safety of the system during operation.

[0029] As a preferred example of this application, the stator electrode plate 2 includes an electrode plate body 201. The electrode plate body 201 includes an insulating portion 202 covered with insulating material on its outer surface and a brush contact area 203 not covered with insulating material. The brush 3 is installed in the brush contact area 203. In this example, by using an insulating layer to cover the stator electrode plate 2 body, most of the conductive metal area is completely hidden under the insulating material, leaving only the brush contact area 203 associated with the installation of the brush 3 as an exposed part. This makes the stator electrode plate 2 present a highly defined partition between the conductive and insulating areas at the structural level. While the brush 3 installation end forms a conductive connection with the electrode plate body 201, the remaining non-contact parts are all under the insulating protective cover. Even in environments with high humidity or when the air contains dust particles, accidental breakdown will not occur due to excessive exposure of the electrode surface. Compared with the traditional completely exposed stator electrode structure, which requires a large gap to avoid discharge, this application can form a protective barrier through the insulating layer. The effect significantly reduces the diffusion of the high-voltage electric field in the non-contact area, thereby further compressing the spacing between the stator electrode plates 2 without increasing the size of the stator frame 1. Combined with the structure of the brushes 3 being staggered along the axial direction of the stator electrode plates 2 along the stator frame 1, the brush contact points are not only spaced apart in height, but also isolated by insulating material in the lateral expansion range. The whole forms a three-dimensional, interlaced and partially encapsulated array of conductive contacts, so that each brush position is in a relatively independent electric field environment. The charge transfer process is more concentrated and stable, further reducing contact resistance fluctuations and the probability of electric sparks. This allows the system to maintain low loss and high reliability even when running at high speed, providing a solid foundation for the electrostatic motor to achieve high wind pressure output and long-term operation.

[0030] As a preferred example of this application, a brush 3 is provided on the electrode plate body 201 of each stator electrode plate 2, and the brush contact areas 203 of two adjacent electrode plate bodies 201 are located at the upper and lower ends of the electrode plate body 201, respectively. In the example of this application, by providing a brush contact area 203 on each stator electrode plate body and arranging the brush contact areas 203 of adjacent stator electrode plates 2 alternately vertically in the height direction, the brush contact positions are vertically layered in structure, so that the charge transfer points originally concentrated on one plane are dispersed to different height positions, thereby minimizing the coupling probability of the high voltage electric field in the same plane, avoiding arcing or corona discharge caused by multiple brushes 3 being too close to each other during operation, thus improving the withstand voltage performance without increasing the stator volume, making it suitable for stable use in high voltage and high frequency operation scenarios, and possessing the comprehensive advantages of simple structure, easy processing, reliable contact without vibration, and controllable electric field with high safety.

[0031] As a preferred example of this application, the stator frame 1 includes an annularly arranged upper frame 101 and lower frame 104. The upper frame 101 and the lower frame 104 are coaxial and parallel. The upper and lower ends of the stator electrode plates 2 are respectively fixedly connected between the upper frame 101 and the lower frame 104, so that each stator electrode plate 2 is vertically spaced along the circumference. In the example of this application, by setting the coaxial and parallel upper frame 101 and lower frame 104 in the stator frame 1, each stator electrode plate 2 has independent support points at its upper and lower ends, thereby forming an overall support structure similar to a cage-like skeleton. Compared with the traditional cantilever electrode arrangement method that relies on only one side support, the upper and lower double support points can effectively prevent the stator electrode plates 2 from shaking or tilting under the action of a high voltage electric field, and further ensure that the brush 3 can maintain a stable contact path even in the axially misaligned distribution state. Both the upper frame 101 and the lower frame 104 are made of insulating material, so that the stator electrode plates 2 are connected together. The electric field is formed solely through the air medium without charge leakage from the frame itself. The double-layer ring support structure not only enhances the overall mechanical strength of the stator but also ensures that the stator electrode plate 2 remains vertical, preventing the brush 3 and rotor conductive plate 402 from detaching due to stator structure misalignment. The ring configuration ensures a periodic and uniform distribution of charge loading, which is beneficial for forming a continuous and stable electrostatic driving torque. This optimizes the electric field pattern while maintaining mechanical rigidity, achieving a dual improvement in structural stability and charge transfer efficiency. It is suitable for electrostatic fan systems that require high-speed rotation under high-voltage environments.

[0032] As a preferred example of this application, the stator electrode plate 2 is divided into a positive electrode group 21 and a negative electrode group 22. The positive electrode group 21 includes a plurality of positive electrode sheets distributed circumferentially at intervals. The negative electrode group 22 includes a number of negative electrode sheets equal to the number of positive electrode sheets. The positive and negative electrode sheets are arranged alternately circumferentially between the upper frame 101 and the lower frame 104 of the stator frame 1. All positive electrode sheets of the positive electrode group 21 are electrically connected to the positive terminal of an external power supply, and all negative electrode sheets of the negative electrode group 22 are electrically connected to the negative terminal of an external power supply. In the example of this application, by dividing the stator electrode plate 2 into a positive electrode group 21 and a negative electrode group 22 and arranging the positive and negative electrode plates alternately in the circumferential direction, the stator as a whole forms a regular and continuous alternating polarity structure. The adjacent electrode plates always maintain a positive-negative relative relationship, thereby constructing a ring-shaped multi-polar electric field environment without increasing the number of additional electrodes. This structure effectively avoids the local electric field imbalance caused by the random arrangement of electrode polarities. The one-to-one correspondence of the positive and negative electrode plates in the structure makes the charge distribution present a periodic repeating pattern. The electric field direction forms a clear attraction or repulsion path between each pair of electrodes, so that the charge force always points radially towards the rotor assembly 4. The positive and negative electrode plates are connected to the positive and negative poles of the high-voltage DC power supply through wires or busbars, so that all electrode plates in the same group are simultaneously controlled by the power supply to form a consistent polarity, avoiding the polarity drift problem caused by poor contact of individual electrodes. The circumferential alternating arrangement ensures that the brush 3 always corresponds to the stable potential difference between the positive and negative electrodes when making contact at different heights, thereby ensuring that the brush 3 can obtain balanced charge input even when making contact at different heights, forming a complete closed electric field drive link.

[0033] As a preferred example of this application, the brushes 3 on all the positive electrode plates in the positive electrode group 21 are arranged at the same height in the axial direction of the stator frame 1, and the brushes 3 on all the negative electrode plates in the negative electrode group 22 are arranged at the same height in the axial direction of the stator frame 1. In the example of this application, by uniformly installing all brushes 3 of the positive electrode group 21 at one axial height position and uniformly installing all brushes 3 of the negative electrode group 22 at another height position, a brush 3 arrangement pattern of consistent polarity and layered polarity is formed. This makes the originally staggered distribution of brushes 3 present a highly clear grouping characteristic, forming a complete upper brush line and a complete lower brush line in the mechanical structure. This not only makes the installation and maintenance more standardized, but also makes the polarity of the brush clear visually and structurally, avoiding the risk of misaligned installation of positive and negative brushes during assembly. At the same time, since the brushes 3 of the same polarity are at the same height, the brushes 3 of this group will not have differences in up-and-down swing when in contact with the rotor conductive plate 402, and the contact path is more consistent. The concentrated contact also makes it easier to apply a uniform elastic force or fixing method to the brushes 3, forming a brush misconnection system with a regular structure, clear potential, and balanced distance.

[0034] As a preferred example of this application, the extension direction of the stator electrode plate 2 is set at a predetermined angle between its central axis at the connection point of the upper frame 101 and the lower frame 104. In the example of this application, by installing the stator electrode plate 2 at an angle relative to the central axis of the connection point of the stator frame 1, the stator electrode plate 2 is arranged vertically on the frame plane of the stator frame 1, and then tilted at a certain angle towards the rotor rotation direction or the electric field direction. The tilted structure makes the windward surface or the electric field surface of the stator electrode plate 2 form a natural guiding path, which is equivalent to providing an active guiding trajectory for charge flow in terms of structure. This makes it easier for positive and negative charges to form uniform adhesion when they approach the surface of the electrode plate. At the same time, the tilt angle of the stator electrode plate 2 also makes the electrostatic force generate a tangential component on the surface of the electrode plate, so that the interaction between the brush 3 and the rotor is transformed from a single adsorption force into a spiral thrust effect with a driving tendency. This allows the charge to form a continuous guiding airflow during the loading process, so that the air in the local area can continue to flow, reduce the concentration of local ionized gas, and prevent the corona phenomenon caused by gas accumulation.

[0035] As a preferred example of this application, a plurality of first connecting rods 102 are radially arranged on the inner side of the upper frame 101, and the plurality of first connecting rods 102 form a first connecting portion 103 with a first connecting hole 107 at the center of the upper frame 101. Correspondingly, a plurality of second connecting rods 105 are radially arranged on the inner side of the lower frame 104, and the plurality of second connecting rods 105 form a second connecting portion 106 with a second connecting hole 108 at the center of the lower frame 104. The first connecting hole 107 and the second connecting hole 108 are coaxially arranged to provide rotational support for the rotating shaft 5. In the example of this application, by setting spoke-type connecting rods on the inner side of the upper frame 101 and the lower frame 104 and extending radially to the center position, the two form a stable connection part at the center of their respective frames and open coaxial connection holes for supporting the rotating shaft 5. This structure not only provides the rotating shaft 5 with double-point support at the top and bottom, enabling it to maintain a stable vertical posture under the combined action of high voltage electric field and rotational force, but also concentrates the electrical connection lines of the circumferentially distributed stator electrode plates 2 on the connecting rod to form a natural confluence path. This allows the positive and negative wires to be guided to the central area through the connecting rod without additional wiring racks, reducing wire crossings and improving the overall wiring neatness and insulation reliability. In addition, the radial connecting rod structure gives the stator frame 1 higher torsional stiffness, making it less likely for the stator electrode plates 2 to undergo local displacement when subjected to the friction force or electric field force of the brush 3, ensuring the stability of the contact position between the brush 3 and the rotor, thereby improving the structural reliability and continuous operation capability of the overall mechanism under high-speed operation and high-voltage drive conditions.

[0036] In the example of this application, the diameter and thickness of the stator frame 1, as well as the number and spacing of the stator electrode plates 2, can be adaptively adjusted as needed. The materials of the stator electrode plates 2, the brush 3, and the insulation part 202 are all commercially available materials in the prior art, and can be adaptively selected as needed.

[0037] As a preferred example of this application, this application also discloses an electrostatic fan, including a rotor assembly 4 and a stator assembly 6 arranged coaxially. The stator assembly 6 adopts a stator electrode structure with staggered brush connection as described in the above embodiments. The rotor assembly 4 includes a rotor conductive plate 402 for forming sliding contact with the brush 3 to obtain charge and a fan blade 403 that rotates integrally with the rotor conductive plate 402. When an external power supply is connected to the positive electrode group 21 and the negative electrode group 22 respectively, the brush 3 transfers charge to the rotor conductive plate 402, causing the rotor conductive plate 402 to drive the fan blade 403 to rotate around the central axis of the stator assembly under the action of electrostatic repulsion and attraction. This application combines a stator assembly 6 with a staggered brush 3 structure with a rotor assembly 4 having conductive plates and fan blades integrated, enabling the brush 3 to periodically transfer charge to the rotor conductive plates 402 in a stable contact state during rotor rotation. This avoids partial discharge or arcing caused by the high concentration of charge on the brush 3, resulting in a more uniform circumferential distribution of charge and balanced force on the rotor conductive plates 402. This ensures that the fan blades 403 do not wobble or vibrate during high-speed operation. At the same time, the staggered arrangement of the brush 3 effectively increases the axial distance between the positive and negative potential contact points, extending the range of electrostatic field action and enhancing the continuity of charge transfer. This allows the fan to maintain a stable speed output and continuous airflow propulsion under high-voltage drive. As a preferred example of this application, the rotor assembly 4 further includes: Rotor frame 401, which is rotatable about the central axis of the stator assembly 6 and is at least partially located within the stator assembly 6; Multiple rotor conductive plates 402 are provided and distributed on the circumferential outer side of the rotor frame 401. During the rotation of the rotor assembly 4, the rotor conductive plates 402 pass sequentially through the corona regions of the positive electrode plate and the negative electrode plate of the stator assembly 6. Multiple fan blades 403 are provided and are integrated with the rotor frame 401.

[0038] In the example of this application, by setting the rotor conductive plate 402 on the circumferential outer side of the annular rotor frame 401, it can continuously pass through the corona region formed by the positive and negative poles during rotation and maintain periodic sliding contact with the brush 3, realizing dynamic charge replenishment and ensuring that the rotor assembly 4 always has sufficient electrostatic driving force throughout the rotation process; the fan blade 403 is directly fixed to the outer periphery of the rotor frame 401, or indirectly connected to the rotor frame 401, and torque output can be realized without additional transmission structure, so that the charge input and airflow output form a highly synchronized direct-drive power chain, reducing mechanical energy loss; the rotor frame 401 is at least partially located inside the stator assembly 6, making the electric field coverage more concentrated, which is conducive to improving charge conversion efficiency. At the same time, the surrounding layout of the corona region can also form continuous driving force at different positions of the rotor conductive plate 402, avoiding speed fluctuations caused by the interruption of driving force, thereby achieving a more stable rotation output.

[0039] As a preferred example of this application, a third connecting part 404 is provided at the center of the rotor frame 401, and a rotating shaft 5 is provided on the third connecting part 404. The rotating shaft 5 is rotatably connected to the first connecting hole 107 and the second connecting hole 108 on the stator assembly 6 through bearings. In the example of this application, by providing a third connecting part 404 at the center of the rotor frame 401 and installing the rotating shaft 5, the entire rotor assembly 4 obtains a clear center of rotation. The two ends of the rotating shaft 5 are supported and engaged with the connecting holes of the upper frame 101 and the lower frame 104 respectively through bearings, realizing coaxial positioning at both upper and lower points. This allows the rotor to maintain a stable trajectory during rotation regardless of electrostatic forces or airflow disturbances, avoiding frictional noise and energy loss caused by eccentric rotation. At the same time, the bearing connection enables the rotating shaft to have low-resistance rotation capability while maintaining good support strength, reducing the electrostatic driving force required for start-up and continuous operation, and further converting more charge energy into effective airflow output rather than mechanical loss. In the example of this application, the third connecting part 404 is connected to the rotor frame 401 by a connecting rod, and the fan blade 403 is arranged on the third connecting part 404 at a certain tilt angle.

[0040] This application employs a staggered arrangement of brushes 3 along the axial direction in the stator electrode structure, creating a stepped distribution of positive and negative electrode contact points in space. This significantly increases the effective spacing between the high-voltage brushes 3 without increasing the frame size, preventing corona discharge and arc breakdown caused by concentrated electric fields. Simultaneously, the conductive areas of the stator electrode plate 2, except for the brush 3 contact areas, are entirely covered with insulating material, keeping non-contact parts in an insulated state. This effectively suppresses the risk of leakage in humid or dusty environments, ensuring stable operation of the brush contact points in an independent electric field environment. The stator electrode plate 2 is installed at a preset angle to guide the electric field lines. During the contact process, the charge generates a driving tendency with a tangential component, converting electrostatic adsorption into continuous thrust and improving the smoothness of torque output. The stator frame 1 adopts upper and lower double ring support and sets a bearing hole in the center, so that the shaft can obtain dual-point positioning support, making the rotor rotation more stable. The rotor conductive plate 402 and fan blade 403 of the rotor assembly 4 are integrally installed on the rotor frame 401, which makes the charge transfer path short, the friction loss low, and the driving efficiency high. Through the above synergistic improvement, the electrostatic fan has comprehensive advantages such as strong pressure resistance, stable charge transfer, continuous driving force output, low operating noise, compact structure and easy assembly under high voltage drive.

[0041] The embodiments of this application have been described above with reference to the accompanying drawings. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. This application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A stator electrode structure with staggered brush connection, characterized in that, include: Stator frame (1) is used to support and fix the stator electrode plate (2); Multiple stator electrode plates (2) are set up and arranged alternately as positive and negative pole pairs along the circumference of the stator frame (1); The brush (3) is set on the stator electrode plate (2) for electrical connection with the rotor conductive plate (402) of the rotor assembly (4). Two adjacent brushes (3) are staggered vertically in the axial direction of the stator frame (1).

2. The stator electrode structure with staggered brush connection according to claim 1, characterized in that, The stator electrode plate (2) includes an electrode plate body (201), which includes an insulating part (202) covered with insulating material on its outer surface and a brush contact area (203) not covered with insulating material. The brush (3) is installed in the brush contact area (203).

3. The stator electrode structure with staggered brush connection according to claim 2, characterized in that, A brush (3) is provided on the electrode plate body (201) of each of the static electrode plates (2), and the brush contact areas (203) of two adjacent electrode plate bodies (201) are located at the upper and lower ends of the electrode plate body (201), respectively.

4. The stator electrode structure with staggered brush connection according to any one of claims 1 to 3, characterized in that, The stator frame (1) includes an upper frame (101) and a lower frame (104) arranged in a ring. The upper frame (101) and the lower frame (104) are coaxial and arranged in parallel. The upper and lower ends of the stator electrode plate (2) are fixedly connected between the upper frame (101) and the lower frame (104) respectively, so that each stator electrode plate (2) is vertically spaced along the circumference.

5. The stator electrode structure with staggered brush connection according to claim 4, characterized in that, The stator electrode plate (2) is divided into a positive electrode group (21) and a negative electrode group (22). The positive electrode group (21) includes a plurality of positive electrode plates distributed circumferentially. The negative electrode group (22) includes a number of negative electrode plates equal to the number of positive electrode plates. The positive electrode plates and negative electrode plates are arranged alternately circumferentially between the upper frame (101) and the lower frame (104) of the stator frame (1). All positive electrode plates of the positive electrode group (21) are electrically connected to the positive terminal of the external power supply, and all negative electrode plates of the negative electrode group (22) are electrically connected to the negative terminal of the external power supply.

6. The stator electrode structure with staggered brush connection according to claim 5, characterized in that, The brushes (3) on all the positive electrode plates in the positive electrode group (21) are set at the same height in the axial direction of the stator frame (1), and the brushes (3) on all the negative electrode plates in the negative electrode group (22) are set at the same height in the axial direction of the stator frame (1).

7. The stator electrode structure with staggered brush connection according to claim 4, characterized in that, The extension direction of the static electrode plate (2) is set at a preset angle between its central axis at the connection point of the upper frame (101) and the lower frame (104).

8. The stator electrode structure with staggered brush connection according to claim 5, 6, or 7, characterized in that, Multiple first connecting rods (102) are radially arranged on the inner side of the upper frame (101). The multiple first connecting rods (102) form a first connecting part (103) with a first connecting hole (107) at the center of the upper frame (101). Correspondingly, multiple second connecting rods (105) are radially arranged on the inner side of the lower frame (104). The multiple second connecting rods (105) form a second connecting part (106) with a second connecting hole (108) at the center of the lower frame (104). The first connecting hole (107) and the second connecting hole (108) are coaxially arranged to provide rotational support for the rotating shaft (5).

9. An electrostatic fan, characterized in that, The system includes a rotor assembly (4) and a stator assembly (6) arranged coaxially. The stator assembly (6) adopts a stator electrode structure with staggered brush connection as described in any one of claims 1 to 8. The rotor assembly (4) includes a rotor conductive plate (402) for forming a sliding contact with the brush (3) to obtain charge and a fan blade (403) connected to the rotor conductive plate (402). When an external power supply is connected to the positive electrode group (21) and the negative electrode group (22) respectively, the brush (3) transfers charge to the rotor conductive plate (402), causing the rotor conductive plate (402) to drive the fan blade (403) to rotate around the central axis of the stator assembly under the action of electrostatic repulsion and attraction.

10. The electrostatic fan according to claim 9, characterized in that, The rotor assembly (4) further includes: The rotor frame (401) is rotatable about the central axis of the stator assembly (6) and is at least partially located within the stator assembly (6); Multiple rotor conductive plates (402) are provided and distributed on the circumferential outer side of the rotor frame (401). During the rotation of the rotor assembly (4), the rotor conductive plates (402) pass sequentially through the corona regions of the positive and negative electrode plates of the stator assembly (6). Multiple fan blades (403) are provided and are integrated with the rotor frame (401).

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