Conductive ring and conductive structure

Abstract

The application provides a conductive ring and a conductive structure. The conductive ring comprises a first metal ring, a second metal ring, a conductive component and a locking component. The first metal ring is sleeved on the outer circumferential side of the second metal ring. The first metal ring is provided with a first clamping portion extending inward and in the radial direction. The second metal ring is provided with a second clamping portion extending inward and in the radial direction. The first clamping portion and the second clamping portion form a gap for mounting the conductive component. The first end of the conductive component in the radial direction is arranged between the gaps. The second end of the conductive component in the radial direction extends towards the inner side of the second metal ring. The locking component is arranged between the first clamping portion and the second clamping portion. The locking component locks the first clamping portion and the second clamping portion relative to each other to tightly fix the conductive component in the gap. The contact is prevented from loosening due to thermal expansion and cold shrinkage of the metal ring. The conductive component is ensured to be in long-term close contact with the metal ring. The induced voltage is stably led out. The conductive performance is reliable.

Description

Technical Field

[0001] This utility model relates to the field of electrical protection technology, and in particular to a conductive ring and conductive structure. Background Technology

[0002] During the operation of industrial equipment (such as electric motors and transmissions), control components such as frequency converters can easily generate variable-frequency induced voltages on the rotating shaft of the equipment. If these induced voltages cannot be discharged in time, they can break down the resistance of the bearing lubricant and discharge through the bearing, causing small melting marks on the bearing working surface and balls. Over time, these melting marks will gradually develop into depressions, eventually causing bearing damage. At the same time, induced voltages may also cause electromagnetic compatibility (EMV) problems, such as interference noise generated during equipment operation, which seriously affects the stable operation and service life of the equipment.

[0003] To address the aforementioned issues, conductive rings (also known as shaft grounding rings) have been developed for discharging induced voltage or charge from a shaft. These rings consist of an annular housing, a conductive discharging element, and a metal component for clamping and securing the discharging element. The discharging element is typically made of conductive polytetrafluoroethylene (PTFE), while the metal component (usually a metal ring) clamps and secures the conductive PTFE element, ensuring a conductive connection between it and the housing, thus forming a conductive path from the shaft to the grounded housing.

[0004] Existing conductive rings fix the metal ring and the conductive element through a radial interference fit. The conductive PTFE element is clamped between the two metal rings. However, the metal rings are only limited by the radial interference fit. Due to the obvious thermal expansion and contraction characteristics of metal materials, the heat generated by the equipment during operation will cause the temperature of the metal rings to rise. The radial expansion of the outer metal ring is usually greater than that of the inner metal ring. When the equipment is shut down and cooled down, the radial contraction of the outer metal ring will be greater than that of the inner metal ring, and a radial gap may even be generated between them. Long-term temperature cycling will continuously weaken the stability of the radial interference fit, causing the inner metal ring to easily shift along the axial direction, or even directly detach from the outer metal ring. This will result in poor contact between the PTFE sheet and the metal ring, affecting the conductivity. Utility Model Content

[0005] The purpose of this application is to provide a conductive ring to solve the problem in the prior art where the conductive element of the conductive ring is not in close contact with the metal ring, thus affecting conductivity; in addition, the purpose of this application is also to provide a conductive structure including the conductive ring.

[0006] To achieve this objective, the following technical solution is adopted in this application:

[0007] This application provides a conductive ring, which includes a first metal ring, a second metal ring, a conductive component, and a locking component, wherein:

[0008] The first metal ring is fitted onto the outer periphery of the second metal ring;

[0009] A first clamping portion extending inward and radially is provided on a first metal ring, and a second clamping portion extending inward and radially is provided on a second metal ring, with a gap for mounting conductive components formed between the first clamping portion and the second clamping portion.

[0010] The first end of the conductive component is disposed in the gap along the radial direction, and the second end of the conductive component extends toward the inner side of the second metal ring along the radial direction. The locking component is disposed between the first clamping part and the second clamping part. The locking component is configured to lock or release the first clamping part and the second clamping part relative to each other to press and fix or release the conductive component in the gap.

[0011] Optionally, the first metal ring is fixed to the outer periphery of the second metal ring by riveting.

[0012] Optionally, a first threaded hole is provided through the first clamping part, and a second threaded hole is provided through the second clamping part, with the first threaded hole and the second threaded hole corresponding to each other;

[0013] The locking assembly includes a first bolt and a first locking nut. The first bolt is screwed into the first threaded hole and the second threaded hole and then locked by the first locking nut to lock and fix the first clamping part and the second clamping part.

[0014] Optionally, the conductive component also includes at least one gasket, which is fitted between the head of the first bolt and the first clamping portion or the second clamping portion.

[0015] Alternatively, a washer may be fitted between the first locking nut and the first or second clamping part.

[0016] Optionally, a first through hole is provided through the first clamping part, and a second through hole is provided through the second clamping part, with the first through hole and the second through hole corresponding to each other;

[0017] The locking assembly includes a second bolt and a second locking nut. The shank of the second bolt passes through the first through hole and the second through hole and is locked by the second locking nut to lock and fix the first clamping part and the second clamping part.

[0018] Optionally, the first clamping part is provided with a threaded blind hole, and the second clamping part is provided with a countersunk hole, with the threaded blind hole corresponding to the countersunk hole;

[0019] The locking assembly includes a countersunk bolt that passes through a countersunk hole and is screwed into a threaded blind hole. The head of the countersunk bolt is accommodated in the countersunk hole to lock and fix the first clamping part and the second clamping part.

[0020] Optionally, the conductive component includes at least one layer of conductive annular PTFE sheet.

[0021] Optionally, the conductive component includes several layers of PTFE sheets, which are stacked axially.

[0022] Optionally, the inner diameter of the PTFE sheet can be increased or decreased sequentially along the axial direction.

[0023] A conductive structure comprising a first conductive element, a second conductive element, and any one of the aforementioned conductive rings, wherein:

[0024] A conductive ring is fitted between a first conductive element and a second conductive element. The sidewall of the first metal ring abuts against the first conductive element to make the first metal ring electrically connected to the first conductive element. The second end of the conductive component along the radial direction abuts against the second conductive element to make the conductive component electrically connected to the second conductive element.

[0025] Compared with the prior art, the conductive ring proposed in this application has the following advantages:

[0026] 1) By fitting the first metal ring onto the outer periphery of the second metal ring, a gap is formed by the clamping parts of the two metal rings to install the conductive component. The locking or loosening state of the clamping part is controlled by the locking component, which realizes the controllable adjustment of the conductive component being pressed and fixed or loosened. This avoids the contact loosening caused by the thermal expansion and contraction of the metal ring, ensures that the conductive component and the metal ring are in close contact for a long time, stably outputs the induced voltage, and ensures reliable conductivity.

[0027] 2) By using a riveting process to fix the first metal ring to the outer circumference of the second metal ring, the initial fixation of the two metal rings radially fits together, preventing radial relative displacement, further improving the overall structural stability of the conductive ring, and reducing the risk of loosening during long-term use.

[0028] 3) By setting the conductive components as multi-layered stacked and conductive annular PTFE sheets, and using an adjustable locking component, it is easy to quickly remove the PTFE sheets to adjust the degree of compression of the PTFE sheets or the number of PTFE sheets in a timely manner, thereby adjusting the flow rate of the medium through the conductive PTFE ring. Attached Figure Description

[0029] To more clearly illustrate and understand the technical solutions in the embodiments of this application, the accompanying drawings used in the background technology and embodiment descriptions of this application will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of this application and these drawings without creative effort.

[0030] Figure 1This is a cross-sectional view of the conductive structure provided in the embodiments of this application;

[0031] Figure 2 This is a cross-sectional view of a first embodiment of the locking assembly for the conductive ring provided in this application;

[0032] Figure 3 This is a cross-sectional view of a second embodiment of the locking assembly for the conductive ring provided in this application;

[0033] Figure 4 This is a cross-sectional view of a third embodiment of the locking assembly for the conductive ring provided in this application. Detailed Implementation

[0034] To facilitate understanding of this application, a more complete description of the application will be provided below with reference to the accompanying drawings. Preferred embodiments of the application are shown in the drawings. However, the application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this application. It should be noted that when a component is referred to as being "fixed to" another component, it can be directly on the other component or there may be an intermediate component. When a component is referred to as being "connected to" another component, it can be directly connected to the other component or there may be an intermediate component. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementations. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the specification of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0035] Please see Figures 1 to 4 As shown in the embodiment of this application, a conductive ring includes a first metal ring 10, a second metal ring 20, a conductive component 30, and a locking component 40, wherein:

[0036] The first metal ring 10 is fitted onto the outer periphery of the second metal ring 20;

[0037] The first metal ring 10 is provided with an inwardly facing and radially ( Figure 1 A first clamping part 11 extends in the direction of X (in the middle X), and a second clamping part 21 is provided on the second metal ring 20, extending inward and radially. A gap for mounting the conductive component 30 is formed between the first clamping part 11 and the second clamping part 21.

[0038] The first end of the conductive component 30 is disposed in the gap along the radial direction, and the second end of the conductive component 30 extends toward the inner side of the second metal ring 20 along the radial direction. The locking component 40 is disposed between the first clamping part 11 and the second clamping part 21. The locking component 40 is configured to lock or release the first clamping part 11 and the second clamping part 21 relative to each other, so as to press and fix or release the conductive component 30 in the gap.

[0039] Specifically, the outer periphery of the first metal ring 10 is provided with an arc transition structure and its end is provided with a guide slope 12, which facilitates the quick installation of the first metal ring 10.

[0040] By providing a locking component 40 between the first clamping part 11 and the second clamping part 21, the locking component 40 is used to lock the first clamping part 11 and the second clamping part 21, thereby controlling the compression state of the conductive component 30, avoiding contact loosening caused by thermal expansion and contraction of the metal ring, ensuring that the conductive component 30 and the metal ring are in close contact for a long time, and stably delivering the induced voltage.

[0041] In one embodiment, the first metal ring 10 is fixed to the outer periphery of the second metal ring 20 by riveting.

[0042] By riveting the first metal ring 10 and the second metal ring 20 together, a radially fitted fixed connection is formed between the two, which enhances the initial bonding strength of the two metal rings, prevents radial relative displacement, further improves the overall structural stability of the conductive ring, and reduces the risk of loosening during long-term use.

[0043] In one embodiment, a first threaded hole is provided through the first clamping part 11, and a second threaded hole is provided through the second clamping part 21, with the first threaded hole and the second threaded hole corresponding to each other.

[0044] The locking assembly 40 includes a first bolt 41 and a first locking nut 42. The first bolt 41 is screwed into the first threaded hole and the second threaded hole and then locked by the first locking nut 42 to lock and fix the first clamping part 11 and the second clamping part 21.

[0045] By setting corresponding threaded holes in the two clamping parts respectively, the first bolt 41 is screwed into the threaded hole and then locked with the first locking nut 42, which realizes the firm connection between the two clamping parts and the precise clamping of the conductive component 30. The clamping force of the conductive component 30 can be adjusted according to the needs to adapt to different working conditions. It is also easy to disassemble and assemble, and convenient for later maintenance or replacement of the conductive component 30.

[0046] In one embodiment, the conductive component 30 further includes at least one washer 43, which is fitted between the head of the first bolt 41 and the first clamping portion 11 or the second clamping portion 21.

[0047] Alternatively, the washer 43 is fitted between the first locking nut 42 and the first clamping part 11 or the second clamping part 21.

[0048] Specifically, gasket 43 can be a metal gasket or an elastic silicone gasket.

[0049] By installing a washer 43 between the bolt head or locking nut and the corresponding clamping part, the force-bearing area is increased, avoiding the bolt or nut from directly pressing the metal ring and causing local deformation or damage. At the same time, the conductive component 30 is subjected to more uniform force, further improving contact stability and extending the service life of the metal ring and the conductive component 30.

[0050] In one embodiment, a first through hole is provided through the first clamping part 11, and a second through hole is provided through the second clamping part 21, with the first through hole and the second through hole corresponding to each other;

[0051] The locking assembly 40 includes a second bolt 44 and a second locking nut 45. The shank of the second bolt 44 passes through the first through hole and the second through hole and is locked by the second locking nut 45 to lock and fix the first clamping part 11 and the second clamping part 21.

[0052] By setting corresponding through holes in the two clamping parts, the second bolt 44 passes through the through holes and is then locked with the second locking nut 45, which achieves flexible fixing of the two clamping parts. The structure is simple, and the cooperation between the bolt and the nut can provide a stable and adjustable locking force, which can not only firmly fix the conductive component 30 and ensure tight contact, but also facilitate subsequent disassembly and maintenance, effectively balancing the practicality of the structure and the ease of operation.

[0053] In one embodiment, a threaded blind hole 110 is provided on the first clamping part 11, and a countersunk hole 210 is provided through the second clamping part 21, with the threaded blind hole 110 corresponding to the countersunk hole 210.

[0054] The locking assembly 40 includes a countersunk bolt 46, which passes through a countersunk hole 210 and is screwed into a threaded blind hole 110. The head of the countersunk bolt 46 is accommodated in the countersunk hole 210 to lock and fix the first clamping part 11 and the second clamping part 21.

[0055] Specifically, the taper angle of the countersunk hole 210 is consistent with the taper angle of the head of the countersunk bolt 46, so that the head of the countersunk bolt 46 abuts against the bottom of the countersunk hole 210, thereby enhancing the stability of the installation.

[0056] By providing a threaded blind hole 110 in the first clamping part 11 and a countersunk hole 210 in the second clamping part 21, the countersunk bolt 46 is screwed into the threaded blind hole 110 through the countersunk hole 210 and its head is accommodated in the countersunk hole 210, thus achieving concealed installation of the locking assembly 40, avoiding interference with other components, ensuring the surface of the conductive ring is flat, and further simplifying the structure of the locking assembly 40 by using the countersunk bolt 46, thereby improving the overall installation efficiency.

[0057] In one embodiment, the conductive component 30 includes at least one layer of conductive annular PTFE sheet.

[0058] Specifically, conductive fillers (such as carbon black, metal powder, carbon fiber, etc.) are added to PTFE sheets to achieve conductivity.

[0059] By setting the conductive component 30 as a conductive annular PTFE sheet, the conductive function is combined with wear resistance and high and low temperature resistance. This ensures stable current conduction and utilizes the excellent chemical stability and low coefficient of friction of PTFE material to prevent the conductive component 30 from failing due to wear or environmental changes during long-term use, thus extending its service life.

[0060] In one embodiment, the conductive component 30 includes a plurality of PTFE sheets, the plurality of PTFE sheets being arranged axially ( Figure 1 Stacking settings (Y direction).

[0061] Specifically, the axial direction is perpendicular to the radial direction.

[0062] Preferably, the conductive component 30 comprises three layers of PTFE sheet.

[0063] By setting the conductive component 30 as several layers of PTFE sheets stacked along the axial direction, the conductive contact area is increased through multi-layer stacking, the current conduction capability is improved, and single-point contact failure is avoided; at the same time, the elasticity of the stacked structure can buffer the stress generated by the thermal expansion and contraction of the metal ring, offset the influence of temperature cycling on the contact state, and maintain long-term contact stability.

[0064] In one embodiment, the inner diameter of the PTFE sheet increases or decreases sequentially along the axial direction.

[0065] By using a stacked structure with progressively varying inner diameters of multi-layer PTFE sheets, the contact area between each PTFE sheet and the metal ring is distributed in a stepped manner, avoiding stress concentration at a single interface and reducing the risk of local deformation. At the same time, the progressively varying inner diameter design can form a continuous conductive network. The outer PTFE sheet with a smaller inner diameter fits tightly with the metal ring, while the inner PTFE sheet with a larger inner diameter maintains stable contact with the shaft conductive component, reducing contact resistance.

[0066] A conductive structure includes a first conductive element 50, a second conductive element 60, and any one of the aforementioned conductive rings, wherein:

[0067] A conductive ring is fitted between the first conductive element 50 and the second conductive element 60. The sidewall of the first metal ring 10 abuts against the first conductive element 50 so that the first metal ring 10 and the first conductive element 50 are electrically connected. The second end of the conductive component 30 in the radial direction abuts against the second conductive element 60 so as to realize the electrical connection between the conductive component 30 and the second conductive element 60.

[0068] The above embodiments merely illustrate the basic principles and characteristics of this application. This application is not limited to the above examples. Various changes and modifications can be made to this application without departing from the spirit and scope thereof, and all such changes and modifications fall within the scope of this application as claimed. The scope of protection of this application is defined by the appended claims and their equivalents.

Claims

1. A conductive ring, characterized in that, The conductive ring includes a first metal ring, a second metal ring, a conductive component, and a locking component, wherein: The first metal ring is fitted onto the outer periphery of the second metal ring; The first metal ring is provided with a first clamping part extending inward and radially, and the second metal ring is provided with a second clamping part extending inward and radially, and a gap for mounting the conductive component is formed between the first clamping part and the second clamping part. The first radial end of the conductive component is disposed in the gap, and the second radial end of the conductive component extends toward the inner side of the second metal ring. The locking component is disposed between the first clamping part and the second clamping part. The locking component is configured to lock or release the first clamping part and the second clamping part relative to each other to press and fix or release the conductive component in the gap.

2. The conductive ring according to claim 1, characterized in that, The first metal ring is fixed to the outer periphery of the second metal ring by riveting.

3. The conductive ring according to claim 1, characterized in that, The first clamping part is provided with a first threaded hole, and the second clamping part is provided with a second threaded hole, with the first threaded hole corresponding to the second threaded hole; The locking assembly includes a first bolt and a first locking nut. The first bolt is screwed into the first threaded hole and the second threaded hole and then locked by the first locking nut to lock and fix the first clamping part and the second clamping part.

4. The conductive ring according to claim 3, characterized in that, The conductive component further includes at least one gasket, which is fitted between the head of the first bolt and the first clamping portion or the second clamping portion; Alternatively, the gasket may be fitted between the first locking nut and the first clamping portion or the second clamping portion.

5. The conductive ring according to claim 1, characterized in that, The first clamping part is provided with a first through hole, and the second clamping part is provided with a second through hole, with the first through hole and the second through hole corresponding to each other; The locking assembly includes a second bolt and a second locking nut. The shank of the second bolt passes through the first through hole and the second through hole and is locked by the second locking nut to lock and fix the first clamping part and the second clamping part.

6. The conductive ring according to claim 1, characterized in that, The first clamping part is provided with a threaded blind hole, and the second clamping part is provided with a countersunk hole, wherein the threaded blind hole corresponds to the countersunk hole; The locking assembly includes a countersunk bolt that passes through the countersunk hole and is screwed into the threaded blind hole. The head of the countersunk bolt is accommodated in the countersunk hole to lock and fix the first clamping part and the second clamping part.

7. The conductive ring according to claim 1, characterized in that, The conductive component includes at least one layer of conductive annular PTFE sheet.

8. The conductive ring according to claim 7, characterized in that, The conductive component includes several layers of PTFE sheets, which are stacked axially.

9. The conductive ring according to claim 8, characterized in that, The inner diameter of the PTFE sheet increases or decreases sequentially along the axial direction.

10. A conductive structure, characterized in that, The conductive structure includes a first conductive element, a second conductive element, and a conductive ring as described in any one of claims 1-9, wherein: The conductive ring is fitted between the first conductive element and the second conductive element. The sidewall of the first metal ring abuts against the first conductive element so that the first metal ring is electrically connected to the first conductive element. The second end of the conductive component along the radial direction abuts against the second conductive element so as to realize the electrical connection between the conductive component and the second conductive element.

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