A motor and fan with protection against electrocorrosion

Abstract

The utility model discloses a motor and fan of anti -electricity corrosion, and the motor of anti -electricity corrosion includes stator subassembly, rotor subassembly and the ball bearing of being located between rotor subassembly and stator subassembly, and the ball bearing includes inner ring, outer ring and the ball between inner ring and outer ring, still include ground member, and the ball is equipped with conductive lubricating medium, and stator subassembly is electrically connected with ground member. Through setting conductive lubricating medium in the ball, and utilizing ground member to contact stator subassembly and handle, make when the ball bearing work, the potential difference of its inner ring and outer ring approaches zero, thereby avoided the problem that voltage difference breaks down grease film and destroys the track surface of ball bearing, and then improved the service life of fan.

Description

Technical Field

[0001] This utility model relates to the field of fan technology, and in particular to a motor and fan resistant to electro-corrosion. Background Technology

[0002] With market development and technological advancements, fans are being used more widely. For fans that use ball bearings, the proper functioning of the ball bearings is one of the key factors in ensuring fan reliability.

[0003] Currently, charging pile products have been added to the fan industry. Charging pile products contain large transformers and other devices that can generate changing strong magnetic fields. The metal parts inside the fan cut the magnetic field and generate voltage. Because the metal parts inside the fan cannot conduct the voltage in time, the ball bearing grease insulation causes a voltage difference to form between the inner and outer rings, breaking down the grease film. This forms electrical sparks on the bearing track surface, causing abnormal ball bearing noise or failure, resulting in fan damage. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a motor and fan that are resistant to electro-corrosion, aiming to solve the problem of fan damage caused by voltage difference breaking down the grease film.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: On the one hand, this utility model provides an anti-electro-corrosion motor, including a stator assembly, a rotor assembly, and a ball bearing disposed between the rotor assembly and the stator assembly. The ball bearing includes an inner ring, an outer ring, and balls disposed between the inner ring and the outer ring. It also includes a grounding member, the balls being provided with a conductive lubricating medium, and the stator assembly being electrically connected to the grounding member.

[0006] Furthermore, the conductive lubricating medium is a conductive grease.

[0007] Furthermore, the stator assembly includes a bearing housing, and the outer ring is fixedly connected to the bearing housing.

[0008] Furthermore, the bearing housing is a copper tube made of copper or a copper alloy.

[0009] Furthermore, the rotor assembly includes a shaft and a motor housing, the inner ring is fixedly connected to the shaft, and one end of the shaft is fixedly connected to the motor housing.

[0010] Furthermore, the stator assembly also includes an iron core, which is fixedly connected to the bearing housing.

[0011] Furthermore, the stator assembly also includes a pin, the iron core has a pin hole, one end of the pin is placed in the pin hole and electrically connected to the iron core, and the other end of the pin is electrically connected to the grounding member.

[0012] Furthermore, it also includes a PCB board, the other end of the PIN pin is soldered to the PCB board, and the grounding member is connected to the PCB board.

[0013] Furthermore, the grounding component is a conductor.

[0014] On the other hand, the present invention also provides a fan, including fan blades, a housing and the aforementioned anti-electro-corrosion motor, wherein the anti-electro-corrosion motor is disposed inside the housing and is drivenly connected to the fan blades.

[0015] The beneficial effects of this utility model compared with the prior art are as follows: An anti-electrochemical corrosion motor includes a stator assembly, a rotor assembly, and a ball bearing disposed between the rotor assembly and the stator assembly. The ball bearing includes an inner ring, an outer ring, and balls disposed between the inner and outer rings. It also includes a grounding component. The balls are provided with a conductive lubricating medium, and the stator assembly is electrically connected to the grounding component. By providing a conductive lubricating medium in the balls and using the grounding component to make contact with the stator assembly, the potential difference between the inner and outer rings of the ball bearing approaches zero during operation. This avoids the problem of voltage difference breaking down the grease film and damaging the ball bearing's raceway surface, thereby improving the fan's service life.

[0016] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model, it can be implemented according to the contents of the specification. In order to make the above and other objectives, features and advantages of this utility model more obvious and easy to understand, the following are preferred embodiments, which are described in detail below. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 A schematic diagram of the structure of a fan provided for a specific embodiment of this utility model; Figure 2 An exploded view of a fan provided for a specific embodiment of this utility model; Figure 3 An exploded view of an anti-electro-corrosion motor provided for a specific embodiment of this utility model; Figure 4 A schematic diagram of the iron core provided for a specific embodiment of this utility model.

[0019] Figure Labels 1. Anti-electrolytic corrosion motor; 11. Ball bearing; 12. Motor housing; 13. Iron core; 131. Pin hole; 14. Bearing housing; 15. PCB board; 16. Shaft; 17. PIN pin; 2. Fan blade; 3. Outer casing. Detailed Implementation

[0020] The technical solution of this utility model will be clearly and completely described below with reference to specific embodiments. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0021] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0022] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0023] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0024] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0025] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0026] like Figures 1 to 4 As shown, this embodiment of the present invention provides a fan, including fan blades 2, a housing 3, and an anti-electro-corrosion motor 1. The anti-electro-corrosion motor 1 is disposed inside the housing 3 and is drivenly connected to the fan blades 2. The anti-electro-corrosion motor 1 includes a stator assembly, a rotor assembly, and a ball bearing 11 disposed between the rotor assembly and the stator assembly. The ball bearing 11 includes an inner ring, an outer ring, and balls disposed between the inner ring and the outer ring. It also includes a grounding member, and the balls are provided with a conductive lubricating medium. The stator assembly is electrically connected to the grounding member.

[0027] By using a conductive lubricating medium and a grounding path, the induced current or leakage current generated during the operation of the ball bearing 11 is promptly diverted, ensuring that the potential difference between the inner and outer rings of the ball bearing 11 approaches zero. This fundamentally avoids the phenomenon of current breaking down the oil film and causing electro-spark corrosion (electro-erosion), protecting the raceway surface and balls of the ball bearing 11. It also eliminates problems such as abnormal noise, increased vibration, increased torque, and premature failure of the ball bearing 11 caused by electro-erosion, significantly extending the service life and operational reliability of the motor.

[0028] In practical applications, conductive lubricating medium can be filled into the entire internal cavity of the ball bearing 11, so that it can fully wet and cover the balls and fill all the gaps between the balls and the inner and outer raceways.

[0029] In some embodiments, the conductive lubricating medium is preferably conductive grease, a high-performance lubricant that forms a robust lubricating film between the balls and the bearing raceways, effectively reducing friction and wear, and ensuring the mechanical life and smooth rotation of the bearing. Simultaneously, by uniformly dispersing a high concentration of conductive fillers (such as metal particles, carbon nanomaterials, etc.) within it, it also possesses stable conductivity. This addresses both the key technical requirements of lubrication and conductivity, simplifying the design and avoiding the structural complexity and increased costs associated with introducing additional conductive components.

[0030] In such Figure 3 In the embodiment shown, the stator assembly includes a bearing housing 14, and the outer ring is fixedly connected to the bearing housing 14.

[0031] Specifically, the bearing housing 14 is a copper tube made of copper or copper alloy. The diameter of the copper tube is at least large enough to accommodate the outer ring of the ball bearing 11. The outer ring of the ball bearing 11 can be fixed inside the copper tube by snap-fit ​​or adhesive, and the two are electrically connected.

[0032] In such Figure 3 In the embodiment shown, the rotor assembly includes a shaft 16 and a motor housing 12. The inner ring is fixedly connected to the shaft 16, one end of the shaft 16 is fixedly connected to the motor housing 12, and the other end of the shaft 16 is connected to the fan blade 2.

[0033] Specifically, the inner ring of the ball bearing 11 is fixedly connected to the shaft 16 through an interference fit. The shaft 16 and the central part of the motor housing 12 are permanently fixed together by forming a molten weld at the joint through welding processes such as laser welding and argon arc welding.

[0034] By integrating the motor housing 12, the shaft 16, and the inner ring of the bearing into a single unit, efficient torque transmission and dynamic balance during motor operation are ensured. Simultaneously, this rigid connection provides a stable, low-impedance convergence and conduction point for the induced current, allowing it to flow smoothly from the motor housing 12 through the shaft 16 to the inner ring of the ball bearing 11.

[0035] In such Figure 3 In the embodiment shown, the stator assembly further includes an iron core 13, which is fixedly connected to the bearing housing 14.

[0036] Specifically, the iron core 13 has a mounting hole at its center. The bearing seat 14 can be fixed in the mounting hole of the iron core 13 by interference fit or welding. This ensures that the bearing seat 14 and the iron core 13 are in full contact, providing an effective transmission path for current transmission.

[0037] In such Figure 3In the illustrated embodiment, the stator assembly further includes a pin 17, and the iron core 13 has a pin hole 131. One end of the pin 17 is placed in the pin hole 131 and electrically connected to the iron core 13, and the other end of the pin 17 is electrically connected to a grounding component. It also includes a PCB board 15, with the other end of the pin 17 soldered to the PCB board 15, and the grounding component connected to the PCB board 15.

[0038] PIN pin 17 is made of a metal material with good conductivity, such as brass or phosphor bronze, and is in the form of a straight pin with a certain rigidity or a pin with a specific bending structure.

[0039] The pin hole 131 is opened at the end of the iron core 13 and avoids its center position. The diameter of the pin hole 131 matches the diameter of the PIN pin 17. During assembly, one end of the PIN pin 17 is inserted into the pin hole 131 of the iron core 13 to achieve an interference fit. The other end of the PIN pin 17 is soldered to the pre-set metallized through hole on the PCB board 15 to achieve a firm mechanical anchor and a good electrical connection.

[0040] It should be noted that the PIN pin 17 may not be inserted into the pin hole 131. Instead, one end of the PIN pin 17 may be soldered or riveted to a conductive terminal or solder piece soldered to the iron core 13.

[0041] It should also be noted that the other end of PIN 17 can be soldered without passing through the through hole. Instead, surface mount technology can be used to design PIN 17 as an L-shape, with its end mounted and soldered to the ground pad on the PCB surface.

[0042] In some embodiments, the grounding component is a conductor, one end of which is electrically connected to the PCB board 15 by welding or plugging, and the other end of which serves as an external grounding terminal.

[0043] The overall conductive path is as follows: the current flows sequentially through the shaft 16, the inner ring, the conductive grease covering the ball bearing, the outer ring, the bearing housing 14, the iron core 13, the PIN pin 17, the PCB board 15, and the grounding component, thereby making the potential difference between the inner and outer rings of the ball bearing 11 approach zero.

[0044] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this utility model, and these modifications or substitutions should all be covered within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. An electro-corrosion resistant motor, comprising a stator assembly, a rotor assembly, and a ball bearing disposed between the rotor assembly and the stator assembly, the ball bearing comprising an inner ring, an outer ring, and balls disposed between the inner ring and the outer ring; characterized in that, It also includes a grounding component, the ball bearings are provided with a conductive lubricating medium, and the stator assembly is electrically connected to the grounding component.

2. The anti-electrochemical corrosion motor according to claim 1, characterized in that, The conductive lubricating medium is conductive grease.

3. The anti-electrochemical corrosion motor according to claim 1, characterized in that, The stator assembly includes a bearing housing, and the outer ring is fixedly connected to the bearing housing.

4. The anti-electrolytic corrosion motor according to claim 3, characterized in that, The bearing housing is a copper tube made of copper or copper alloy.

5. The anti-electrochemical corrosion motor according to claim 1, characterized in that, The rotor assembly includes a shaft and a motor housing, the inner ring is fixedly connected to the shaft, and one end of the shaft is fixedly connected to the motor housing.

6. The anti-electrolytic corrosion motor according to claim 3, characterized in that, The stator assembly also includes an iron core, which is fixedly connected to the bearing housing.

7. The anti-electrochemical corrosion motor according to claim 6, characterized in that, The stator assembly also includes a pin, the iron core has a pin hole, one end of the pin is placed in the pin hole and electrically connected to the iron core, and the other end of the pin is electrically connected to the grounding component.

8. The anti-electrochemical corrosion motor according to claim 7, characterized in that, It also includes a PCB board, the other end of the PIN pin is soldered to the PCB board, and the grounding component is connected to the PCB board.

9. The anti-electrochemical corrosion motor according to claim 1, characterized in that, The grounding component is a conductor.

10. A fan, characterized in that, The device includes fan blades, a housing, and an anti-electro-corrosion motor as described in any one of claims 1-9, wherein the anti-electro-corrosion motor is disposed within the housing and is drive-connected to the fan blades.

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