Electrolytic corrosion protection ring structure

Abstract

The application discloses an electric corrosion protection ring structure, and belongs to the field of electrically conductive ring structure design. The ring body is configured in a ring shape; a plurality of electrically conductive fibers are arranged in a ring shape on the inner wall of the ring body in the circumferential direction of the ring body; a sleeve is used for sleeving the electrically conductive fibers; wherein the extending part of the inner wall of the ring body extends in the direction of the central axis, and the extending part extends along the circumferential direction of the ring body to form a protection ring. The application has the beneficial effect of providing an electric corrosion protection ring structure capable of preventing oil and water.

Description

Technical Field

[0001] This application relates to the field of conductive ring structure design, and more specifically, to an electro-erosion protection ring structure. Background Technology

[0002] In recent years, the new energy sector has developed rapidly, and the application of variable frequency motors has become increasingly widespread. With the continuous increase in motor power, the higher voltage platform often leads to higher shaft voltage. Furthermore, to adapt to high speeds, the viscosity of lubricating oil / grease decreases, resulting in a thinner oil film and poorer load-bearing capacity. Therefore, bearing electro-corrosion problems have become prominent in the past two years. Bearing electro-corrosion in motors is a key concern for OEMs recently.

[0003] A current Chinese patent document, CN218386131 U, discloses a side-circuit conductive ring and a motor. It includes a conductive ring body and conductive fibers. The conductive ring body has radially opened fiber holes, and the conductive fibers are implanted within the fiber holes, with at least one end of the conductive fibers extending out of the fiber holes. A clamping portion is formed on the sidewall of the fiber holes, protruding into the fiber holes and abutting against the conductive fibers. The contact surface between the clamping portion and the conductive fibers is wavy. By pressing the conductive fibers radially into the clamping portion of the conductive ring body, the conductive fibers are securely installed within the limiting holes of the conductive ring body. Furthermore, the clamping portion acts on the undulating wavy contact surface of the conductive fibers, achieving a multiple tightening and loosening pressing method for the conductive fibers.

[0004] In actual operation, when installed in an oil-cooled motor, excessive oil volume will wash away the fiber bundles (lift the fiber bundles), affecting the contact between the fiber bundles and the shaft; the above-disclosed structure does not solve this technical defect; therefore, it is necessary to design an electro-erosion protection ring structure that can block oil. Summary of the Invention

[0005] The summary section of this application is intended to provide a brief overview of the concepts, which will be described in detail in the detailed description section below. This summary section is not intended to identify key or essential features of the claimed technical solutions, nor is it intended to limit the scope of the claimed technical solutions.

[0006] In order to solve the technical problems mentioned in the background section, some embodiments of this application provide an electro-erosion protection ring structure, wherein the ring body is configured in a ring shape;

[0007] Several conductive fibers are arranged in a circular array on the inner wall of the ring along the circumferential direction of the ring.

[0008] A sleeve, used to hold conductive fibers;

[0009] Among them, the part located on the inner wall of the ring extends radially toward the central axis, and the extended part extends around the circumference of the ring to form a protective ring;

[0010] Furthermore, the inner wall of the protective ring and the inner ring of the ring body form a distance L in the radial direction;

[0011] The spacing L ranges from 0.3mm to 4.1mm.

[0012] Furthermore, the surface of the protective ring forms a spacing M with the conductive fiber;

[0013] The spacing M ranges from 1.2mm to 2.1mm.

[0014] Furthermore, the inner ring wall of the ring body is radially concave to form a mounting groove ring for inserting the bundle sleeve;

[0015] The mounting groove ring extends circumferentially around the ring body;

[0016] In the radial direction, the surface of the sleeve located inside the mounting ring always has a gap of 0.1 mm to 0.3 mm with the inner wall of the ring body.

[0017] Furthermore, several riveting holes are formed on the surfaces of the ring body and the protective ring that are opposite each other;

[0018] In the axial direction of the ring, the rivet hole is located above the mounting groove;

[0019] The rivet holes are set to correspond to the bushings.

[0020] Furthermore, on the same plane, there is a distance N between the end of the conductive fiber in the radial direction and the inner wall of the ring.

[0021] The value of the spacing N ranges from 0.5 mm to 6 mm.

[0022] Furthermore, the outer edge of the ring forms a slope;

[0023] The inclined plane intersects the surface of the ring to form an angle α, and the value of the angle α is always no greater than 45°.

[0024] The inclined plane forms a length H, which ranges from 0.5 mm to 3 mm.

[0025] Furthermore, the inner wall of the mounting groove forms several positioning grooves;

[0026] The positioning grooves are arranged in a ring along the circumference of the mounting groove;

[0027] The positioning groove is positioned opposite to the riveting hole.

[0028] Furthermore, the protective ring is fixedly provided with a plurality of limiting components on the side corresponding to the conductive fiber. The limiting components include connecting arms and blocking rods. There are multiple connecting arms and they are correspondingly arranged between adjacent conductive fibers. The connecting arms are fixedly connected to the end face of the protective ring. The blocking rods are fixedly arranged between adjacent connecting arms. The conductive fiber passes through the enclosed area formed by the connecting arms, blocking rods and protective ring.

[0029] Furthermore, the connecting arm is bendable and is positioned at the middle of the conductive fiber along its length. The side of the blocking rod corresponding to the conductive fiber is curved, and the arc height at the middle position of the blocking rod is less than the arc height at its two ends.

[0030] The beneficial effects of this application are as follows: First, the rivet holes enable one-time riveting of the conductive fiber bundle, resulting in higher assembly efficiency. Second, the protective ring prevents oil, water, and dust from entering the fiber bundle and hindering its contact with conductivity. Third, the inclined surface provides guidance and positioning when installed on the motor housing, facilitating ring installation. Fourth, because the protrusion distance of the conductive fibers is 0.5mm to 6mm, the inner wall of the ring will not rub against the shaft surface during operation, nor will it be washed away by oil or water, ensuring good contact between the conductive fiber bundle and the shaft, thus achieving conductivity. Attached Figure Description

[0031] The accompanying drawings, which form part of this application, are used to provide a further understanding of the application and to make other features, objects, and advantages of the application more apparent. The illustrative embodiments and descriptions of this application are used to explain the application and do not constitute an undue limitation of the application.

[0032] Furthermore, throughout the accompanying drawings, the same or similar reference numerals denote the same or similar elements. It should be understood that the drawings are schematic, and the elements are not necessarily drawn to scale.

[0033] In the attached diagram:

[0034] Figure 1 This is an overall schematic diagram according to Embodiment 1 of this application;

[0035] Figure 2 This is a structural schematic diagram of a part of Embodiment 1, mainly showing the structure of the conductive fiber and the sheath;

[0036] Figure 3 This is a structural schematic diagram of a part of Embodiment 1, mainly showing the structure of the ring;

[0037] Figure 4 This is a structural schematic diagram of a part of Embodiment 1, mainly showing the structure of the ring body and the protective ring;

[0038] Figure 5 yes Figure 4 Enlarged view of part A;

[0039] Figure 6 This is a structural schematic diagram of part of Embodiment 2, mainly showing the structure between the limiting component, conductive fiber, and protective ring.

[0040] Figure label:

[0041] 1-Ring body; a1-Inner ring; a2-Outer ring; a10-Ceiling surface; a101-Ceiling angle α; a102-Length H; 11-Mounting groove;

[0042] 2-Conductive fiber; a20-Spacing N;

[0043] 3-Sleeve;

[0044] 4-Rivet holes;

[0045] 5 - Protective ring; a50 - Spacing L; a501 - Spacing M;

[0046] 6-Limiting assembly; 61-Connecting arm; 62-Blocking bar. Detailed Implementation

[0047] Embodiments of this disclosure will now be described in more detail with reference to the accompanying drawings. While some embodiments of this disclosure are shown in the drawings, it should be understood that this disclosure can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of this disclosure. It should be understood that the accompanying drawings and embodiments of this disclosure are for illustrative purposes only and are not intended to limit the scope of protection of this disclosure.

[0048] It should also be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings. Unless otherwise specified, the embodiments and features described in this disclosure can be combined with each other.

[0049] It should be noted that the concepts of "first" and "second" mentioned in this disclosure are used only to distinguish different devices, modules or units, and are not used to limit the order of functions performed by these devices, modules or units or their interdependencies.

[0050] It should be noted that the terms "a" and "a plurality of" used in this disclosure are illustrative rather than restrictive, and those skilled in the art should understand that, unless otherwise expressly indicated in the context, they should be understood as "one or more".

[0051] This disclosure will now be described in detail with reference to the accompanying drawings and embodiments.

[0052] Example 1

[0053] An electro-erosion protection ring structure is installed on a motor; it includes: a ring body 1, a conductive fiber 2, a sleeve 3, and a protective ring 5;

[0054] Specifically, the ring 1 is constructed in the shape of an inner ring a1 and an outer ring a2; a plurality of conductive fibers 2 are provided on the inner wall of the inner ring a1 of the ring 1, and the conductive fibers 2 are inserted into a sleeve 3, which is preferably made of copper; the conductive fibers 2 are arranged in a ring array on the inner wall of the ring 1 along the circumferential direction; more specifically, the ring 1 is interference-fitted with the motor spindle, and the end of the conductive fiber 2 away from the ring 1 is interference-fitted with the motor housing of the motor.

[0055] More specifically, the outer ring a2 side of the ring body 1 forms a bevel a10; the bevel a10 intersects the surface of the ring body 1 to form a bevel angle α, and the bevel angle α is 45°; wherein, the bevel a10 forms a length H, the length H is in the range of 0.5mm to 3mm; preferably 1.5mm; the bevel a10 can play a positioning role during interference fit, which is convenient for installation.

[0056] Specifically, the inner wall of the inner ring a1 of the ring body 1 is radially recessed to form a mounting groove 11, which extends around the circumference of the ring body 1; the conductive fiber 2 is inserted into the mounting groove 11, and the extension direction of the conductive fiber 2 in the length direction intersects and is perpendicular to the axis of the ring body 1 in the same plane.

[0057] More specifically, the surface of the ring 1 has multiple riveting holes 4 corresponding to the conductive fibers 2 formed directly above the mounting groove 11; wherein, the riveting holes 4 are circular; the riveting is performed by using a stamping tool, which causes the two sides of the mounting groove 11 to deform, thereby fastening the conductive fibers 2; thus, rapid assembly can be achieved; since the riveting holes 4 correspond to the sleeve 3, the compressive force on the sleeve 3 can be more uniform during riveting.

[0058] Specifically, in the radial direction, the surface of the sleeve 3 located inside the mounting ring always has a gap of 0.1mm to 0.3mm with the inner ring a1 wall of the ring body 1, preferably 0.12mm; with this setting, the sleeve 3 will deform due to the mutual compression of the inner walls of the mounting groove 11 during the riveting process; the existence of the gap can prevent the sleeve 3 from protruding from the outer wall of the mounting groove 11.

[0059] In another preferred embodiment, the end of the conductive fiber 2 protrudes radially from the surface of the inner ring a1, and the protruding portion forms a spacing N, wherein the spacing N ranges from 0.5mm to 6mm; the preferred value is 3mm; with this setting, the conductive fiber bundle 2 can be kept in good contact with the shaft during motor operation, thus achieving a conductive effect; and the inner wall of the ring 1 will not rub against the shaft surface and the wire fiber bundle will not be washed away by oil or water.

[0060] In another preferred embodiment, a protective ring 5 is formed on the surface of the inner ring a1 of the ring body 1, and the extended portion of the protective ring 5 extends around the circumference of the ring body 1; the inner wall of the protective ring 5 and the inner ring a1 of the ring body 1 form a radial distance L, the distance L being in the range of 0.3mm to 4.1mm; preferably 2mm; wherein, the distance L is always less than the distance N; the protective ring 5 can achieve the effect of blocking oil, water, and dust during operation, protecting the fiber bundle and preventing it from being invaded by oil, water, or dust, thus hindering the fiber bundle from contacting electrical conductivity; improving the stability of operation; more specifically, the gap between the inner wall of the protective ring 5 and the side wall of the motor spindle is always between 0.1mm and 2mm.

[0061] More specifically, the surface of the protective ring 5 forms a gap M with the conductive fiber 2, the gap M being in the range of 1.2mm to 2.1mm, preferably 1.3mm; this setting allows the conductive fiber 2 to be blocked by the protective ring 5 when a large amount of oil pushes it up, ensuring that the conductive fiber 2 can still maintain contact with the shaft. In addition, the protective ring 5 can also block the oil to a certain extent, preventing excessive oil from contacting the conductive fiber 2 and reducing the pressure on the conductive fiber 2.

[0062] In another embodiment, the inner wall of the mounting groove 11 is further formed with a plurality of positioning grooves corresponding to the sleeve 3. The positioning grooves are arranged in a ring along the circumferential direction of the mounting groove 11, and the positioning grooves are arranged opposite to the riveting holes 4. With this arrangement, the sleeve 3 can be positioned during installation, and the upper limit of the circumferential direction of the sleeve 3 can be maintained during the riveting process to prevent misalignment.

[0063] Example 2

[0064] In another embodiment, such as Figure 6As shown, the protective ring 5 is fixedly provided with several limiting components 6 on the side corresponding to the conductive fiber 2. The limiting component 6 includes a connecting arm 61 and a blocking rod 62. The connecting arm 61 is made of a flexible and deformable high-temperature resistant material, such as steel or titanium alloy. There are multiple connecting arms 61, which are correspondingly arranged between adjacent conductive fibers 2. Each blocking rod 62 has a separate connecting arm 61 on both sides, so as to control the limiting component 6 individually and avoid the situation where the blocking rod 62 cannot be stretched during the rotation when the limiting components 6 share the connecting arm 61. The connecting arm 61 is fixedly connected to the end face of the protective ring 5. The blocking rod 62 is fixedly arranged between adjacent connecting arms 61. The conductive fiber 2 passes through the area surrounded by the connecting arm 61, the blocking rod 62 and the protective ring 5.

[0065] The connecting arm 61 is flexible and is positioned at the middle of the conductive fiber 2 along its length. The blocking rod 62 has an arc-shaped side surface corresponding to the conductive fiber 2, and the arc height at the middle position of the blocking rod 62 is smaller than the arc height at its two ends.

[0066] During the installation of conductive fiber 2, the conductive fiber 2 is first passed through the limiting component and inserted into the rivet hole 4 for fixing, so that each set of conductive fiber 2 is located in the corresponding limiting component 6. During the high-speed operation of the motor, the oil volume increases and passes over the protective ring 5. The oil squeezes the conductive fiber 2 until it deforms and shifts. The conductive fiber 2 presses on the blocking rod 62. The blocking rod 62 plays a limiting role for the conductive fiber 2. The bow height of the middle position of the blocking rod 62 is less than the bow height of its two ends.

[0067] When the connecting arm 61 is offset toward the root of the conductive fiber 2, the blocking rod 62 is closer to the conductive fiber 2. The blocking rod 62 supports the conductive fiber 2 on the side near the root, which indirectly reduces the lever arm of the conductive fiber 2 and increases the strength of the conductive fiber 2. This is suitable for applications where there is too much oil at the root of the conductive fiber 2.

[0068] Alternatively, when the connecting arm 61 is offset toward the head of the conductive fiber 2, the blocking rod provides further support to the head of the conductive fiber 2, reducing the bending of the head of the conductive fiber 2, which is suitable for cases where the amount of oil in the head of the conductive fiber 2 is too large.

[0069] Alternatively, the connecting arm 61 is set perpendicular to the end face of the protective ring 5. After the conductive fiber 2 is deformed by the pressure of oil in the middle, the two ends of the blocking rod 62 support the conductive fiber 2. The conductive fiber 2 bends towards the lower part of the arc in the middle of the blocking rod, which increases the elastic force in the middle of the conductive fiber 2 and makes it more conducive to the conductive fiber 2 returning to a straight state.

[0070] This allows the conductive fiber 2 to make better contact with the shaft, improving the stability of the motor operation.

[0071] The above description is merely a selection of preferred embodiments of this disclosure and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the invention involved in the embodiments of this disclosure is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the above-described inventive concept. For example, technical solutions formed by substituting the above-described features with (but not limited to) technical features with similar functions disclosed in the embodiments of this disclosure.

Claims

1. A protective ring structure for electro-erosion, Its characteristics include: A ring-shaped structure; Several conductive fibers are arranged in a circular array on the inner wall of the ring along the circumferential direction of the ring. A sleeve, used to cover the conductive fibers; The portion of the inner wall of the ring extends radially toward the central axis, and the extended portion extends around the circumference of the ring to form a protective ring. The protective ring is fixedly provided with a plurality of limiting components on the side corresponding to the conductive fiber. The limiting components include connecting arms and blocking rods. There are multiple connecting arms and they are correspondingly arranged between adjacent conductive fibers. The connecting arms are fixedly connected to the end face of the protective ring. The blocking rods are fixedly arranged between adjacent connecting arms. The conductive fiber passes through the enclosed area formed by the connecting arms, blocking rods and protective ring. Each stop bar has a separate connecting arm on both sides for individual control of the limit assembly; The connecting arm is flexible, the side of the blocking rod corresponding to the conductive fiber is arc-shaped, and the arc height at the middle position of the blocking rod is smaller than the arc height at both ends.

2. The electro-erosion protection ring structure according to claim 1, characterized in that: The inner wall of the protective ring and the inner ring of the ring body form a distance L in the radial direction; The spacing L ranges from 0.3mm to 4.1mm.

3. The electro-erosion protection ring structure according to claim 1, characterized in that: The surface of the protective ring forms a distance M with the conductive fiber; The spacing M ranges from 1.2mm to 2.1mm.

4. The electro-erosion protection ring structure according to claim 1, characterized in that: The inner ring wall of the ring body is radially recessed to form a mounting groove for inserting the sleeve; The mounting groove extends around the circumference of the ring body; In the radial direction, the sleeve surface located in the mounting groove always has a gap of 0.1mm to 0.3mm with the inner ring wall of the ring body.

5. The electro-erosion protection ring structure according to claim 4, characterized in that: The surface of the ring body opposite to the protective ring has a plurality of riveting holes; In the axial direction of the ring, the rivet hole is located above the mounting groove; The rivet hole is provided corresponding to the bushing.

6. The electro-erosion protection ring structure according to claim 1, characterized in that: On the same plane, there is a distance N between the end of the conductive fiber and the inner wall of the ring in the radial direction; The value of the spacing N ranges from 0.5 mm to 6 mm.

7. The electro-erosion protection ring structure according to claim 1, characterized in that: The outer ring side edge of the ring body forms a slope; The inclined plane intersects the surface of the ring to form an angle α, and the value of the angle α is always no greater than 45°. The inclined plane forms a length H, which ranges from 0.5 mm to 3 mm.

8. The electro-erosion protection ring structure according to any one of claims 5, characterized in that: The inner wall of the mounting groove forms a plurality of positioning grooves; The positioning grooves are arranged in a ring along the circumferential direction of the mounting groove; The positioning groove is positioned opposite to the riveting hole.

9. The electro-erosion protection ring structure according to claim 1, characterized in that: The connecting arm is positioned at the midpoint of the length direction of the conductive fiber.

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