Abrasive dust collecting mechanism, conductive mechanism and high voltage rotating conductive device

Abstract

The application discloses a grinding dust collecting mechanism, a conductive mechanism and a high-pressure rotating conductive device, and relates to the technical field of grinding dust collecting. The grinding dust collecting mechanism comprises a containing groove, an in-situ storage groove and a cleaning brush. The containing groove is in a closed ring structure. The containing groove is arranged at the lower part of a sliding ring friction surface and is fixed opposite to the sliding ring. The containing groove is used for receiving the grinding dust falling from the sliding ring friction surface. The in-situ storage groove is arranged on the sliding ring friction surface and extends away from the sliding ring friction surface. The in-situ storage groove is in a ring structure coaxial with the sliding ring friction surface. The bottom surface height of the in-situ storage groove is not higher than the bottom surface height of the containing groove. The cleaning brush is fixedly arranged. The cleaning brush is in contact with the bottom surface of the containing groove and is used for sweeping the grinding dust on the bottom surface of the containing groove into the in-situ storage groove. The scheme provided by the application is suitable for a low-speed and high-pressure environment.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of grinding dust collection, in particular to a grinding dust collection mechanism, a conductive mechanism and a high-voltage rotating conductive device. BACKGROUND

[0002] In the field of high-voltage rotating conductive devices, slip rings are the core components for realizing current transmission between rotating bodies and static structures, and are widely used in single-point mooring turrets, offshore wind power and other ultra-low-speed (rotating speed ≤ 0.5 rpm) high-voltage scenarios. In the long-term operation of such devices, continuous friction between the brush and the conductive ring will generate a large amount of conductive grinding dust (such as carbon powder and metal particles). If the grinding dust is not removed in time, it will accumulate in the insulation gap, causing partial discharge or even breakdown accidents, especially in a high-voltage environment of ≥ 10 kV.

[0003] At present, the traditional grinding dust collection technology is not suitable for ultra-low-speed high-voltage scenarios. SUMMARY

[0004] The purpose of the present application is to provide a grinding dust collection mechanism, a conductive mechanism and a high-voltage rotating conductive device to solve the problems existing in the prior art and be suitable for low-speed and high-voltage environments.

[0005] To achieve the above-mentioned purpose, the present application provides the following solutions:

[0006] The present application provides a grinding dust collection mechanism, comprising: a containing groove, an in-situ storage groove and a cleaning brush, the containing groove is in a closed ring structure, the containing groove is constructed at the lower part of the friction surface of the slip ring and is fixed opposite to the slip ring, the containing groove is used to receive the grinding dust falling from the friction surface of the slip ring; the in-situ storage groove is opened on the friction surface of the slip ring and extends away from the friction surface of the slip ring, and is in a ring structure coaxial with the friction surface of the slip ring, the bottom surface height of the in-situ storage groove is not higher than the bottom surface height of the containing groove; the cleaning brush is fixedly arranged, the cleaning brush is in contact with the bottom surface of the containing groove and is used to sweep the grinding dust on the bottom surface of the containing groove into the in-situ storage groove.

[0007] Preferably, it further comprises a grinding dust negative pressure collection device, the grinding dust negative pressure collection device comprises a negative pressure suction port, a negative pressure generating device and a grinding dust collection cavity, the negative pressure suction port is located in the containing groove or above the containing groove, the negative pressure suction port and the grinding dust collection cavity are communicated, and the negative pressure generating device is configured to generate negative pressure in the negative pressure suction port and the grinding dust collection cavity to suck the grinding dust in the containing groove into the grinding dust collection cavity.

[0008] Preferably, the cleaning brush has a side surface facing the in-situ storage tank, the side surface comprising a first edge and a second edge.

[0009] Preferably, in the circumferential direction of the containing groove, any position of the containing groove passes the negative pressure suction port first and then passes the cleaning brush when rotating with the slip ring.

[0010] Preferably, in the circumferential direction of the containing groove, any position of the containing groove passes the cleaning brush first and then passes the negative pressure suction port when rotating with the slip ring.

[0011] Preferably, a plurality of flow guide grooves are further included, the flow guide grooves being formed on the slip ring friction surface and extending upward spirally from the upper edge of the in-situ storage tank side opening in the rotation direction of the slip ring.

[0012] Preferably, the cleaning brush comprises bristles, a mounting seat, a support frame and a spring, the bristles being mounted at the bottom of the mounting seat, the support frame being fixedly arranged, and the spring being arranged between the top of the mounting seat and the support frame in a compressed state, the mounting seat being arranged on the support frame in a sliding manner, the spring applying a spring force to the mounting seat so that the bottom of the bristles is always in contact with the bottom surface of the containing groove, and the bristles being made of an elastic material with anti-deformation capability.

[0013] Preferably, the abrasive dust collecting cavity is arranged in an anti-corona storage box, the anti-corona storage box comprising an inner layer and an outer layer, the inner layer being a grounded metal filter screen, and the outer layer being an insulating ceramic container wrapped outside the inner layer.

[0014] The application further provides a conductive mechanism, comprising a slip ring, a brush and the abrasive dust collecting mechanism as described above, the brush being in sliding contact with the slip ring friction surface, and in the circumferential direction of the slip ring, any position of the slip ring passes the brush first and then passes the cleaning brush of the abrasive dust collecting mechanism when rotating.

[0015] The application further provides a high-voltage rotary conductive device, comprising the conductive mechanism as described above.

[0016] The application has the following technical effects compared with the prior art:

[0017] The application adopts the containing groove to receive the abrasion debris falling from the friction surface of the slip ring, and then sweeps the abrasion debris to the in-situ storage groove on the friction surface of the slip ring through the cleaning brush to realize the timely removal of the abrasion debris, avoid the abrasion debris scattering in the insulation gap to cause partial discharge and even breakdown accident, and is suitable for the ultra-low speed high voltage scene. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description only represent some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0019] Figure 1 The application provides an abrasion debris collecting mechanism for the first embodiment of the present application.

[0020] Figure 2 The application provides an abrasion debris collecting mechanism for the first embodiment of the present application. Figure 1 The application provides an abrasion debris collecting mechanism for the first embodiment of the present application.

[0021] Figure 3 The application provides an abrasion debris collecting mechanism for the first embodiment of the present application. Figure 1 The application provides an abrasion debris collecting mechanism for the first embodiment of the present application.

[0022] Figure 4 The application provides an abrasion debris collecting mechanism for the first embodiment of the present application. Figure 3 The application provides an abrasion debris collecting mechanism for the first embodiment of the present application.

[0023] Figure 5 The application provides an abrasion debris collecting mechanism for the first embodiment of the present application.

[0024] Figure 6 The application provides an abrasion debris collecting mechanism for the first embodiment of the present application.

[0025] In the drawings: 1-slip ring; 2-abrasion debris negative pressure collecting device; 3-cleaning brush; 4-containing groove; 5-friction surface of slip ring; 6-flow guide groove; 7-in-situ storage groove; 8-negative pressure generating device; 9-negative pressure suction port; 10-abrasion debris collecting cavity; 11-brush. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments only represent some embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without any creative effort belong to the scope of protection of the present application.

[0027] The purpose of the present application is to provide an abrasion debris collecting mechanism, a conductive mechanism and a high-voltage rotating conductive device to solve the problems in the prior art and be suitable for low-speed and high-voltage environments.

[0028] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0029] In traditional grinding debris collection devices, the mainstream centrifugal collection device relies on the centrifugal force generated by the rotation speed to drive the grinding debris to detach. It is not suitable for low-speed environments and there is a secondary re-entrainment of grinding debris, which cannot meet the requirements for use in high-pressure environments.

[0030] In addition, traditional airflow purging or mechanical scraping methods also result in secondary flying of grinding debris, which cannot meet the requirements for use in high-pressure environments.

[0031] Based on this, the following solution provided by the present invention can meet the requirements for use in low-speed, high-pressure environments, as detailed in the following embodiments.

[0032] In this manual, "low speed" refers to a rotational speed of <5 rpm.

[0033] The following is combined with Figures 1 to 6 The following describes embodiments of the present invention.

[0034] Example 1

[0035] This invention provides a wear debris collection mechanism, comprising: a receiving groove 4, an in-situ storage groove 7, and a cleaning brush 3. The receiving groove 4 has a closed annular structure, is constructed at the lower part of the slip ring friction surface 5 and is fixed relative to the slip ring 1, and is used to receive wear debris falling from the slip ring friction surface 5; the in-situ storage groove 7 is formed on the slip ring friction surface 5, extends from the slip ring friction surface 5 in a direction away from the slip ring friction surface 5, and has an annular structure coaxial with the slip ring friction surface 5, the bottom surface of the in-situ storage groove 7 is not higher than the bottom surface of the receiving groove 4; the cleaning brush 3 is fixedly installed, the cleaning brush 3 contacts the bottom surface of the receiving groove 4 and is used to sweep the wear debris on the bottom surface of the receiving groove 4 into the in-situ storage groove 7.

[0036] In use, the receiving groove 4 rotates synchronously with the slip ring 1. When the friction surface 5 of the slip ring and the brush generate wear debris due to friction, the wear debris falls into the receiving groove 4 under the action of gravity. When the receiving groove 4 rotates with the slip ring 1, the fixed cleaning brush 3 can sweep the wear debris into the in-situ storage groove 7 on the friction surface 5 of the slip ring for storage.

[0037] This invention uses a receiving groove 4 to receive the wear debris falling from the slip ring friction surface 5, and then uses a cleaning brush 3 to sweep the wear debris into the in-situ storage groove 7 on the slip ring friction surface 5 for storage. This achieves timely removal of wear debris and prevents it from scattering in the insulation gap, causing partial discharge or even breakdown accidents. It is suitable for ultra-low speed and high voltage scenarios.

[0038] In some embodiments, the present invention further includes a grinding debris negative pressure collection device 2. The grinding debris negative pressure collection device 2 includes a negative pressure suction port 9, a negative pressure generating device 8, and a grinding debris collection chamber 10. The negative pressure suction port 9 is located inside or above the receiving groove 4. The negative pressure suction port 9 and the grinding debris collection chamber 10 are in communication. The negative pressure generating device 8 is configured to generate a negative pressure between the negative pressure suction port 9 and the grinding debris collection chamber 10, so as to draw the grinding debris in the receiving groove 4 into the grinding debris collection chamber 10.

[0039] In use, the receiving groove 4 rotates synchronously with the slip ring 1. When the friction surface 5 of the slip ring and the brush generate wear debris due to friction, the wear debris falls into the receiving groove 4 under the action of gravity. When the receiving groove 4 rotates with the slip ring 1 until the wear debris is close to the negative pressure suction port 9, the wear debris is drawn into the wear debris collection chamber 10 for storage under the action of negative pressure suction.

[0040] In this embodiment, a dual-mode grinding debris collection device is formed by using both sweeping and negative pressure suction, thereby further improving the success rate of grinding debris collection.

[0041] In some examples, multiple negative pressure dust collection devices 2 and multiple cleaning brushes 3 can be set up to collect dust in multiple ways.

[0042] In some embodiments, the cleaning brush 3 has a side facing the in-situ storage tank 7, the side including a first edge and a second edge. The first edge is located at the side opening of the in-situ storage tank 7; the second edge is disposed away from the side opening of the in-situ storage tank 7; there is a smooth transition between the first edge and the second edge; along the circumferential direction of the receiving tank 4, any position of the receiving tank 4 passes the second edge first when rotating with the slip ring 1 past the cleaning brush 3.

[0043] This embodiment achieves the purpose of cleaning the grinding debris in the receiving tank 4 into the in-situ storage tank 7.

[0044] Preferably, the first edge and the second edge are smoothly transitioned in a plane, that is, the side of the cleaning brush 3 facing the in-situ storage tank 7 is a plane.

[0045] Since this application has a dual chip collection function, the two collection mechanisms can be arranged in any direction, each with its own advantages, as shown in the following two embodiments.

[0046] In some embodiments, along the circumferential direction of the receiving groove 4, any position of the receiving groove 4, when rotating with the slip ring 1, first passes through the negative pressure suction port 9 and then through the cleaning brush 3.

[0047] In this embodiment, the grinding debris is first suctioned out by negative pressure through the negative pressure suction port 9, and then the grinding debris that was not suctioned out by negative pressure is swept into the original storage tank 7 by the cleaning brush 3. In this embodiment, negative pressure suction is the main method and cleaning is the auxiliary method, thus achieving the purpose of dual collection.

[0048] In some embodiments, along the circumferential direction of the receiving groove 4, any position of the receiving groove 4, when rotating with the slip ring 1, first passes through the cleaning brush 3 and then through the negative pressure suction port 9.

[0049] In this embodiment, the cleaning brush 3 is first used to sweep the grinding debris that has not been drawn away by the negative pressure into the original storage tank 7, and then the grinding debris is drawn away by the negative pressure suction port 9. In this embodiment, the cleaning is the main method and the negative pressure suction is the auxiliary method, so as to achieve the purpose of dual collection.

[0050] In some embodiments, the present invention further includes a plurality of flow guide grooves 6, which are formed on the friction surface 5 of the slip ring and extend spirally upward from the upper edge of the side opening of the in-situ storage tank 7 along the rotation direction of the slip ring 1.

[0051] In this embodiment, when in use, the brush can sweep the grinding or shavings on the surface of the slip ring friction surface 5 into the guide groove 6. The shavings accumulated in the guide groove 6 can slide down into the receiving groove 4 under the action of gravity. This avoids the defect of shavings falling irregularly and being adsorbed on the slip ring friction surface 5, thereby improving the collection efficiency.

[0052] In some examples, the guide channel 6 is 4-5 mm wide and 2-5 mm deep. The cross-section of the guide channel 6 is U-shaped to reduce partial discharge.

[0053] In some embodiments, the cleaning brush 3 includes bristles 11, a mounting base, a support frame, and a spring. The bristles 11 are mounted on the bottom of the mounting base; the support frame is fixedly mounted; the spring is disposed between the top of the mounting base and the support frame and is in a compressed state; the mounting base is slidably mounted on the support frame, and the spring applies elastic force to the mounting base so that the bottom of the bristles 11 is always in contact with the bottom surface of the receiving groove 4; the bristles 11 are made of an elastic material with deformation resistance.

[0054] This embodiment uses a spring to ensure that the brush bristles 11 are always in contact with the bottom surface of the receiving groove 4, and to maintain the force between the brush bristles 11 and the bottom surface of the receiving groove 4, thereby achieving powerful cleaning and preventing abrasive debris from adhering to the bottom surface of the receiving groove 4.

[0055] Understandably, brush bristles 11 can be made of carbon fiber material.

[0056] In some embodiments, the wear debris collection chamber 10 is disposed in a corona-proof storage box, which includes an inner layer and an outer layer, wherein the inner layer is a grounded metal filter and the outer layer is an insulating ceramic container covering the inner layer.

[0057] This embodiment achieves the purpose of preventing partial discharge.

[0058] Specifically, the metal filter is the structure remaining after a small portion of the spherical filter is cut off. The insulating ceramic container has openings at both opposite ends, while the metal filter has an opening on only one side, with the opening aligned with one side opening of the insulating ceramic container. Together, they form the abrasive inlet of the abrasive collection chamber 10. The mesh on the metal filter corresponding to the opening on the other side of the insulating ceramic container is smaller, preventing abrasive particles from passing through, but allowing gas to pass through. This enables the negative pressure generating device 8 to draw gas from the abrasive collection chamber 10 through the opening on the other side of the insulating ceramic container, thus achieving a negative pressure state.

[0059] The wear debris collection mechanism provided in this application requires regular maintenance. The specific maintenance cycle can be the same as that of the brush. The purpose of maintenance is mainly to remove the collected wear debris in a timely manner so that it can be used in the next cycle.

[0060] Example 2

[0061] The present invention also provides a conductive mechanism, comprising: a slip ring 1, an electric brush, and the wear debris collection mechanism described in Embodiment 1, wherein the electric brush slides in contact with the friction surface 5 of the slip ring; along the circumferential direction of the slip ring 1, when the slip ring 1 rotates, it first passes through the electric brush and then through the cleaning brush in the wear debris collection mechanism.

[0062] This embodiment, equipped with the wear debris collection mechanism described in Embodiment 1, also achieves timely removal of wear debris, preventing it from scattering in the insulation gap and causing partial discharge or even breakdown accidents, making it suitable for ultra-low speed and high voltage scenarios.

[0063] This embodiment possesses all the advantages of Embodiment 1, and will not be repeated here.

[0064] Example 3

[0065] The present invention also provides a high-voltage rotating conductive device, including the conductive mechanism described in Embodiment 2. In this embodiment, since it has the wear debris collection mechanism described in Embodiment 1, it also achieves timely removal of wear debris, preventing it from scattering in the insulation gap and causing partial discharge or even breakdown accidents. It is suitable for ultra-low speed high voltage scenarios.

[0066] This embodiment possesses all the advantages of Embodiment 1, and will not be repeated here.

[0067] Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this invention. Furthermore, those skilled in the art will recognize that, based on the ideas of this invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this invention.

Claims

1. A grinding debris collection mechanism, characterized in that: include: The receiving groove (4) has a closed ring structure and is constructed on the lower part of the slip ring friction surface (5) and fixed relative to the slip ring (1). The receiving groove (4) is used to receive the grinding debris falling from the slip ring friction surface (5). The in-situ storage tank (7) is opened on the slip ring friction surface (5) and extends from the slip ring friction surface (5) in a direction away from the slip ring friction surface (5). It has a ring structure coaxial with the slip ring friction surface (5). The bottom height of the in-situ storage tank (7) is not higher than the bottom height of the receiving tank (4). Cleaning brush (3), the cleaning brush (3) is fixedly installed, the cleaning brush (3) contacts the bottom surface of the receiving groove (4) and is used to sweep the abrasive on the bottom surface of the receiving groove (4) into the in-situ storage groove (7); A grinding debris negative pressure collection device (2) includes a negative pressure suction port (9), a negative pressure generating device (8), and a grinding debris collection chamber (10). The negative pressure suction port (9) is located inside or above the receiving groove (4). The negative pressure suction port (9) and the grinding debris collection chamber (10) are connected. The negative pressure generating device (8) is configured to generate negative pressure between the negative pressure suction port (9) and the grinding debris collection chamber (10) to draw the grinding debris in the receiving groove (4) into the grinding debris collection chamber (10). It also includes multiple guide grooves (6), which are opened on the friction surface (5) of the slip ring and extend spirally upward from the upper edge of the side opening of the in-situ storage tank (7) along the rotation direction of the slip ring (1).

2. The grinding debris collection mechanism according to claim 1, characterized in that: The cleaning brush (3) has a side facing the in-situ storage tank (7), the side comprising: The first edge is located at the side opening of the in-situ storage tank (7); The second edge is provided with a side opening away from the in-situ storage tank (7); The first edge and the second edge have a smooth transition; Along the circumferential direction of the receiving groove (4), any position of the receiving groove (4) passes the second edge first when it rotates with the slip ring (1) past the cleaning brush (3).

3. The grinding debris collection mechanism according to claim 2, characterized in that: Along the circumferential direction of the receiving groove (4), any position of the receiving groove (4) when rotating with the slip ring (1) first passes through the negative pressure suction port (9) and then through the cleaning brush (3).

4. The grinding debris collecting mechanism according to claim 1, characterized in that: Along the circumferential direction of the receiving groove (4), any position of the receiving groove (4) will first pass through the cleaning brush (3) and then through the negative pressure suction port (9) when rotating with the slip ring (1).

5. The grinding debris collection mechanism according to claim 1, characterized in that: The cleaning brush (3) includes: Brush bristles (11); Mounting base, wherein the bristles (11) are mounted on the bottom of the mounting base; Support frame, fixed installation; A spring is disposed between the top of the mounting base and the support frame, and is in a compressed state; The mounting base is slidably mounted on the support frame, and the spring applies elastic force to the mounting base so that the bottom of the bristles (11) is always in contact with the bottom surface of the receiving groove (4); The bristles (11) are made of an elastic material with resistance to deformation.

6. The grinding debris collecting mechanism according to claim 1, characterized in that: The grinding debris collection chamber (10) is disposed within a corona-proof storage box, the corona-proof storage box comprising: The inner layer is a grounded metal filter. The outer layer is an insulating ceramic container that covers the inner layer.

7. A conductive mechanism, characterized in that: include: Slip ring (1); The brush slides in contact with the friction surface (5) of the slip ring; The grinding debris collection mechanism as described in any one of claims 1 to 6; Along the circumferential direction of the slip ring (1), when the slip ring (1) rotates at any position, it first passes the brush and then the cleaning brush in the wear debris collection mechanism.

8. A high-voltage rotating conductive device, characterized in that: Includes the conductive mechanism as described in claim 7.

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