A generator electrostatic grounding structure

Abstract

This utility model discloses a generator electrostatic grounding structure, including a generator shaft, an excitation coil, a slip ring, and a rear bearing. The end of the excitation coil is grounded through a lower carbon brush, and a new grounding point E is added to the end of the excitation coil. A conductive boss is provided on the lower ring insert of the slip ring, which is directly connected to the conductive ring of the slip ring and directly contacts the inner ring of the rear bearing to form a conductive connection. The conductive boss and the newly added grounding point E form a parallel grounding structure. Static electricity sequentially passes through the inner ring of the rear bearing, the conductive boss, and the excitation coil circuit to form a common grounding path. In this way, the static electricity generated by the pulley rotation can be quickly conducted to the ground, effectively avoiding the accumulation of static electricity inside the generator and reducing the risk of damage to the generator regulator IC components due to static electricity. At the same time, it avoids the problem of static electricity breaking down the grease film of the bearing, causing electrolytic erosion damage to the bearing raceway and steel balls.

Description

Technical Field

[0001] This utility model relates to the field of generator technology, and in particular to a generator electrostatic grounding structure. Background Technology

[0002] During the operation of the engine pulley system, the continuous friction between the belt and the generator pulley generates a large amount of static electricity. This static electricity is primarily generated in northern regions, particularly during winter when temperatures are dry. For generators using internally grounded regulators, the generator shaft is not grounded. When the static energy is sufficiently high, it can couple to the excitation circuit, damaging the IC components connected to the regulator's P terminal, leading to generator regulation failure and affecting the normal operation of the entire power generation system. Simultaneously, static electricity can also break down the grease film in the bearings, causing electrolytic corrosion damage to the bearing raceways and steel balls.

[0003] Therefore, there is an urgent need for a grounding structure that can enhance electrostatic discharge capability and protect the generator regulator. Utility Model Content

[0004] To address the technical problems existing in the background art, this utility model proposes a generator electrostatic grounding structure.

[0005] This utility model proposes a generator electrostatic grounding structure, including a generator shaft, an excitation coil, a slip ring, and a rear bearing. The slip ring is sleeved on the outside of the generator shaft, and the rear bearing is press-fitted onto the generator shaft. The end of the excitation coil is grounded through a lower carbon brush, and a new grounding point E is added to the end of the excitation coil. A conductive boss is provided on the lower ring insert of the slip ring. The conductive boss is directly connected to the conductive ring of the slip ring, and the conductive boss is in direct contact with the inner ring of the rear bearing to form a conductive connection. The conductive boss and the newly added grounding point E form a parallel grounding structure. Static electricity sequentially passes through the inner ring of the rear bearing, the conductive boss, and the excitation coil circuit to form a common grounding path.

[0006] Preferably, the conductive boss is configured as an arc-shaped protrusion structure, surrounding the lower ring insert of the current collector ring, and integrally formed with the lower ring insert of the current collector ring.

[0007] Preferably, the inner ring of the rear bearing and the conductive boss form a surface contact conductive connection.

[0008] Preferably, the conductive boss is made of a highly conductive metal material.

[0009] Preferably, the conductive boss is made of copper alloy material.

[0010] In summary, this utility model has the following beneficial effects: This solution provides two electrostatic discharge paths: first, the end of the excitation coil is grounded through the lower carbon brush; second, by adding a conductive boss to the lower ring insert of the slip ring and utilizing the inner ring of the rear bearing for grounding, an independent and low-impedance discharge path for static electricity is provided. This allows for the rapid conduction of static electricity generated by the pulley's rotation to the ground, effectively preventing the accumulation of static electricity inside the generator and reducing the risk of damage to the generator regulator IC components due to static electricity. Simultaneously, it avoids the problem of static electricity breaking down the grease film in the bearing, causing electrolytic erosion damage to the bearing raceway and steel balls.

[0011] The resulting common grounding system has redundant protection. Even if the grounding effect decreases due to wear or other reasons at the lower carbon brush at the end of the excitation coil, the newly added grounding path can still ensure normal static discharge, greatly reducing the risk of damage to the generator regulator IC components due to static electricity and improving the stability and reliability of the power generation system.

[0012] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the generator electrostatic grounding principle according to an embodiment of the present invention;

[0014] Figure 2 This is a perspective view of the collector ring according to an embodiment of the present utility model;

[0015] Figure 3 This is a schematic diagram of the mating structure of the generator shaft and slip ring according to an embodiment of the present utility model;

[0016] Figure 4 This is a schematic diagram of the mating structure of the generator shaft, slip ring, and rear bearing in an embodiment of this utility model.

[0017] In the picture:

[0018] 1. Generator shaft; 2. Excitation coil; 21. New grounding point E; 3. Slip ring; 4. Rear bearing; 5. Lower ring insert; 6. Conductive boss. Detailed Implementation

[0019] The embodiments of this utility model are described in detail below. Examples of these embodiments are illustrated in the accompanying drawings, wherein the same or similar symbols denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0020] like Figure 1-4As shown, the generator electrostatic grounding structure proposed in this embodiment includes a generator shaft 1, an excitation coil 2, a slip ring 3, and a rear bearing 4. The slip ring 3 is sleeved on the outside of the generator shaft 1, and the rear bearing 4 is press-fitted onto the generator shaft 1. The end of the excitation coil 2 is grounded through a lower carbon brush, and a new grounding point E21 is added to the end of the excitation coil 2. A conductive boss 6 is provided on the lower ring insert 5 of the slip ring 3. The conductive boss 6 is directly connected to the conductor of the slip ring 3, and the conductive boss 6 is in direct contact with the inner ring of the rear bearing 4 to form a conductive connection. The conductive boss 6 and the newly added grounding point E21 form a parallel grounding structure. Static electricity sequentially passes through the inner ring of the rear bearing 4, the conductive boss 6, and the excitation coil 2 circuit to form a common grounding path.

[0021] Thus, by providing two electrostatic discharge paths: one is grounding the end of the excitation coil 2 through the lower carbon brush; the other is grounding by adding a conductive boss 6 to the lower ring insert 5 of the slip ring 3 and utilizing the inner ring of the rear bearing 4, an independent and low-impedance discharge path is provided for static electricity. This can quickly conduct the static electricity generated by the pulley rotation to the ground, effectively preventing the accumulation of static electricity inside the generator and reducing the risk of damage to the generator regulator IC components due to static electricity; at the same time, it avoids the problem of static electricity breaking down the grease film of the bearing, causing electrolytic erosion damage to the bearing raceway and steel balls.

[0022] The resulting common grounding system has redundant protection. Even if the grounding effect decreases due to wear or other reasons at the lower carbon brush at the end of excitation coil 2, the newly added grounding path can still ensure normal static discharge, greatly reducing the risk of damage to the generator regulator IC components due to static electricity and improving the stability and reliability of the power generation system.

[0023] Furthermore, the conductive boss 6 is designed as an arc-shaped protrusion structure, surrounding the lower ring insert 5 of the collector ring 3, and is integrally formed with the lower ring insert 5 of the collector ring 3. The process is simple and easy to implement.

[0024] Furthermore, the inner ring of the rear bearing 4 forms a surface contact conductive connection with the conductive boss 6. This can be an interference fit, or an elastic conductive pad can be provided on the surface of the conductive boss 6 to ensure a reliable electrical connection between the two at all times. When static electricity is generated by friction between the belt and the generator pulley and conducted to the generator shaft 1, the static electricity can be transmitted through the generator shaft 1 to the conductive boss 6 of the lower ring insert 5 of the slip ring 3, and then through the inner ring of the rear bearing 4, the outer ring of the rear bearing 4, and the excitation coil 2 circuit to the generator housing, and finally conducted to the ground.

[0025] In this way, the end of the excitation coil 2 is grounded through the lower carbon brush, forming a common grounding system with the newly added grounding path consisting of the conductive boss 6 and the rear bearing 4. When one of the grounding paths fails, the other path can still ensure the effective release of static electricity, greatly improving the reliability of static electricity release.

[0026] Preferably, the conductive boss 6 is made of a highly conductive metal material. Specifically, the conductive boss 6 is made of a copper alloy to reduce contact resistance.

[0027] In summary, once the generator is put into operation, if static electricity is generated due to friction between the belt and the generator pulley, the static electricity will be quickly conducted through the generator shaft 1 to the conductive boss 6 of the lower ring insert 5 of the slip ring 3, and then through the inner ring of the rear bearing 4, the outer ring of the rear bearing 4, and the excitation coil 2 circuit to the generator housing, and finally safely conducted to the ground. At the same time, the grounding path of the lower carbon brush at the end of the excitation coil 2 also plays a role, providing double protection to ensure that the static electricity can be released in a timely and effective manner, thereby protecting the IC components of the generator regulator from electrostatic damage and maintaining the normal and stable operation of the generator.

[0028] It is applicable to various generator models that use internal grounding regulators. Whether in automobile engines, marine engines or industrial generators, as long as there is a problem of static electricity generated by friction between the belt and the generator pulley, the static grounding structure of this utility model can be applied, which has wide applicability and market promotion value.

[0029] It should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0030] 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.

[0031] 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, an electrical connection, or a connection that allows communication between them; 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.

[0032] 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.

[0033] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A generator electrostatic grounding structure comprising a generator shaft, an excitation coil, a collector ring, and a rear bearing, the collector ring being fitted on the outside of the generator shaft, and the rear bearing being press-fitted on the generator shaft, characterized in that, The excitation coil is grounded at its end via a lower carbon brush, and a new grounding point E is added at the end of the excitation coil. A conductive boss is provided on the lower ring insert of the slip ring. The conductive boss is directly connected to the conductive ring of the slip ring, and the conductive boss is in direct contact with the inner ring of the rear bearing to form a conductive connection. The conductive boss and the newly added grounding point E form a parallel grounding structure. Static electricity sequentially passes through the inner ring of the rear bearing, the conductive boss, and the excitation coil circuit to form a common grounding path.

2. The generator electrostatic grounding structure according to claim 1, characterized in that, The conductive boss is configured as an arc-shaped protrusion structure, surrounding the lower ring insert of the current collector ring, and is integrally formed with the lower ring insert of the current collector ring.

3. The generator electrostatic grounding structure according to claim 2, characterized in that, The inner ring of the rear bearing forms a surface contact conductive connection with the conductive boss.

4. The generator electrostatic grounding structure according to claim 1, characterized in that, The conductive boss is made of a highly conductive metal material.

5. The generator electrostatic grounding structure according to claim 1, characterized in that, The conductive boss is made of copper alloy.

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