High-temperature long-life slip ring based on helical groove heat dissipation structure

Abstract

The utility model relates to a slip ring technical field, concretely is a high temperature long life slip ring based on spiral groove heat dissipation structure, the slip ring structure divides rotor and stator, and rotor contains main shaft, front end cover, shock ring, import high temperature precision bearing, import wear -resisting and gold -plated conductive ring and spiral groove import temperature -resistant insulating sheet, and the conductive ring is equipped with the main shaft in the interference of interval, and the main shaft both ends are equipped with shock ring, and the stator contains pressing plate, brush holder, PCB, import copper alloy bundle brush combination body and stainless steel protection cover, and the bundle brush is welded to the fixed connection brush holder after PCB, and the protection cover is fixed connection brush holder and has flange, the utility model discloses a high temperature long life slip ring based on spiral groove heat dissipation structure, and rotor and stator cooperate through bearing, and the conductive ring and bundle brush spring force lap joint signal current. The slip ring can resist 150 DEG C high temperature, and the heat dissipation is good, and the impact resistance is good, and can work continuously for more than 10 years, and the compact structure adapts narrow space, and guarantees pipeline robot signal current stable transmission.

Description

Technical Field

[0001] This utility model relates to the field of slip ring technology, specifically a high-temperature, long-life slip ring based on a spiral groove heat dissipation structure. Background Technology

[0002] Currently, pipeline robots can replace humans in dangerous and harsh pipeline environments, effectively reducing the risk of personal injury. They can also quickly and accurately inspect pipelines, saving time and labor costs. Traditional manual labor often requires high-intensity physical labor, posing a high risk to workers' health and safety. Pipeline robots, on the other hand, can efficiently complete tasks such as inspection, maintenance, and cleaning, greatly reducing the labor intensity and work risks for workers. Because pipeline robots typically operate in confined spaces with poor air circulation and high temperatures, various thermal control measures are employed in their design to ensure normal operation. These measures include the use of heat-sensitive materials, heat pipes, and radiators to maintain the internal temperature of the pipeline robot within a suitable range. The slip ring, as a crucial component for signal transmission in pipeline robots, is critical to its ability to withstand harsh natural environments. In similar slip ring cases, the slip rings could not withstand temperatures up to 150°C. Furthermore, the slip ring in this project is used for pipeline inspection, an environment typically characterized by oxygen deficiency, high temperatures, and difficult heat dissipation. Simultaneously, the joints on the pipeline robot need to rotate 360° without restriction to send and receive signals. Therefore, a high-temperature resistant and impact-resistant slip ring needs to be installed on the rotating shaft to ensure smooth and uninterrupted signal and current transmission during rotation. Since this project is used in the signal transmission system of the pipeline robot, the working life, stability, and accuracy of the transmission components are subject to high requirements.

[0003] Traditional slip ring designs for pipeline robots typically integrate the rotor and track, with the insulation layer usually designed to have a smooth surface. While this works well for short periods, prolonged use can lead to insulation failure due to poor heat dissipation caused by temperature rise, thus affecting the slip ring's lifespan. Other companies in the industry, in an effort to improve slip ring lifespan and high-temperature adaptability, often use aluminum alloy materials, ordinary heat-resistant insulation materials, and domestic electroplating processes, with the insulation layer also typically designed to have a smooth surface. While this design is cost-effective, it results in a larger product size and poor heat dissipation at 150°C, requiring external cooling equipment. This makes it unsuitable for installation within the limited space of a pipeline robot. Furthermore, existing slip ring solutions are insufficient to meet the demands of pipeline robots operating stably for extended periods in harsh environments such as 150°C, confined spaces, and oxygen-deficient environments, as well as the need for uninterrupted signal and current transmission. Therefore, there is an urgent need to develop a high-temperature, long-life slip ring based on a spiral groove heat dissipation structure to overcome the shortcomings of current practical applications. Utility Model Content

[0004] The purpose of this invention is to provide a high-temperature, long-life slip ring based on a spiral groove heat dissipation structure to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: A high-temperature, long-life slip ring based on a spiral groove heat dissipation structure includes a rotor section and a stator section: The rotor part includes a main shaft, a conductive ring, and an insulating sheet. The conductive ring and the insulating sheet are spaced apart and fitted on the main shaft. The insulating sheet has a spiral groove structure. The stator includes a brush holder, a PCB, and a brush assembly, wherein the brush assembly is soldered onto the PCB and the PCB is fixed to the brush holder. The rotor section and the stator section are connected by bearings, and the conductive ring is in elastic contact with the brush assembly to transmit signals and current.

[0006] As a further embodiment of this utility model: the rotor part also includes a front end cover, a shock-absorbing ring one, a shock-absorbing ring two, a bearing one, and a bearing two; The first and second shock-absorbing rings are respectively installed at both ends of the main shaft. The inner rings of the first and second bearings are interference-fitted to the main shaft, and the outer rings are transition-fitted to the bearing positions of the brush holder.

[0007] As a further embodiment of this utility model: the front end cover is connected to the end of the main shaft by bolts to achieve axial positioning of bearing one and bearing two.

[0008] As a further aspect of this utility model: the conductive ring and the main shaft, and the insulating sheet and the main shaft, are both interference fits.

[0009] As a further embodiment of this utility model: the stator part further includes a pressure plate and a protective cover. The pressure plate presses and fixes the PCB to the brush holder, and the protective cover is placed on the outside of the brush holder and fixed with screws.

[0010] As a further embodiment of this utility model: the protective cover is made of stainless steel, and the end away from the rotor has an integrally formed flange with mounting holes.

[0011] As a further embodiment of this utility model: the brush assembly is made of imported copper alloy and is welded to the PCB using a special fixture.

[0012] As a further aspect of this utility model: the conductive ring is made of imported wear-resistant material, and its surface is treated with a special military-grade gold plating process.

[0013] As a further aspect of this utility model, the insulating sheet is made of imported high-temperature resistant insulating material.

[0014] Compared with the prior art, the beneficial effects of this utility model are: 1. The insulating sheet of the slip ring of this utility model is designed with a spiral groove structure. When the temperature of the contact point of the slip ring rises during long-term operation, the heat can be discharged outward through the spiral shape. At the same time, the electrical gap between the rings is increased, which effectively improves the heat dissipation effect and avoids insulation failure due to poor heat dissipation caused by the temperature rise of the slip ring. It is suitable for working environments of pipeline robots with oxygen deficiency, high temperature and difficult heat dissipation, and can meet the requirements for use of slip ring in high temperature environment of 150℃. 2. The use of imported high-temperature resistant insulation materials, imported high-temperature precision bearings, stainless steel protective covers, and insulation materials that are resistant to high and low temperatures and do not easily volatilize ensures the stability of the slip ring's insulation and pressure resistance in the high-temperature working environment of the pipeline. At the same time, the stainless steel material can ensure that the slip ring can be protected for long-term normal operation under high impact, thus improving the slip ring's impact resistance. 3. The conductive ring uses imported wear-resistant materials and its surface is treated with a special military-grade gold plating process. Gold, as a precious metal with excellent conductivity among known solid metals, further improves the surface smoothness, conductivity, and contact performance of the conductive ring after the gold plating process, and reduces the coefficient of friction. At the same time, the multi-brush structure (brush bundle assembly) can ensure the stability of the contact points of the slip ring during ultra-long-term operation. Combined with the overall structural design, it can effectively ensure that the slip ring can work continuously for more than 10 years, meeting the high requirements of pipeline robots for the working life of transmission components. 4. The slip ring of this utility model adopts a non-standard structure design, which avoids the problem of large product size caused by the use of aluminum alloy materials and ordinary heat-resistant insulation materials by competitors in the industry. It can be installed and used in the narrow space of the pipeline robot without the need for external equipment to assist in cooling, and has better adaptability. Moreover, the conductive ring of the rotor and the brush assembly of the stator form a stable and reliable rotating communication system. The principle of elastic overlap is used to realize the smooth and uninterrupted transmission of signals and current, ensuring the stability and reliability of the electrical signal transmission of the pipeline robot. 5. Each end of the spindle is equipped with a shock-absorbing ring structure, which can effectively resist external impact forces from the control system, improve the impact and vibration resistance of the slip ring, protect the internal structure of the slip ring from damage in the pipeline environment, and ensure the smooth and reliable signal transmission during product operation. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the external structure of the slip ring in this utility model.

[0016] Figure 2 This is a schematic diagram of the rotor and stator structure in this utility model.

[0017] In the diagram: 1-Main shaft, 2-Front end cover, 3-Brush assembly, 4-Conductive ring, 5-PCB, 6-Insulating sheet, 7-Protective cover, 8-Brush holder, 9-Shock-absorbing ring one, 10-Bearing one, 11-Shock-absorbing ring two, 12-Bolt, 13-Bearing two. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] The specific implementation of this utility model will be described in detail below with reference to specific embodiments.

[0020] Please see Figure 1 and Figure 2 This utility model provides a high-temperature, long-life slip ring based on a spiral groove heat dissipation structure. This slip ring is specifically designed for pipeline robots to achieve uninterrupted and stable transmission of signals and current when the rotating joints rotate 360° without restriction.

[0021] I. Component Preparation: Prepare all components according to the technical requirements, as follows: Rotor section: The main shaft 1 is machined from high-temperature-compatible metal rods, with pre-drilled damping ring mounting sections and threaded holes at both ends; the front cover 2 has bolt holes that match the threaded holes of the main shaft 1; damping ring 1 (9) and damping ring 2 (11) are made of elastic damping material, with inner diameters compatible with the mounting sections of the main shaft 1; bearing 1 (10) and bearing 2 (13) are imported high-temperature precision bearings, made of stainless steel, with a temperature range of -20℃ to +200℃; the conductive ring 4 is made of imported wear-resistant material, and its surface is treated with a special military-grade gold plating process. Military-grade electroplating typically uses processes such as zinc plating, cadmium plating, and chromium plating, which provide excellent high-temperature resistance; military-grade electroplating processes have characteristics such as high corrosion resistance, functionality, strong adhesion, high hardness, and low hydrogen embrittlement; military-grade electroplating processes can adapt to various harsh working environments, such as high temperature, high humidity, and salt spray, ensuring the reliability and stability of the product under these conditions. Insulating sheet 6 is made of imported high-temperature resistant insulating material PEEK, with a melting point of 343℃ and a heat distortion temperature as high as 315℃. It possesses flame-retardant properties without the need for additional flame-retardant components. A 1.45mm thick sample can meet the UL-94V0 standard, and its smoke emission is significantly lower than other resin varieties. It maintains excellent insulation and stable electrical properties even under high temperature, high pressure, high speed, and high humidity conditions. It is processed into a spiral groove structure to ensure both temperature resistance and heat dissipation requirements.

[0022] Stator section: The pressure plate and brush holder 8 are made of high-temperature resistant metal. The brush holder 8 is machined with bearing positions, PCB fixing threaded holes, and protective cover mounting ears. The PCB 5 is a high-temperature resistant PCB board with reserved brush welding positions and screw avoidance holes. The brush assembly 3 is made of imported copper alloy, which has high strength, high conductivity, corrosion resistance, wear resistance, and non-sparking impact characteristics. It needs to be positioned and welded using a special fixture. The special welding fixture supports the product to be welded through the bearing clamping component and acts on the bearing clamped brush through the downward pressing component, so that the bearing clamping component presses the cantilever beam of the brush, ensuring the reliability of the clamping and achieving a good clamping effect. This effectively avoids the phenomenon of brush misalignment with the ring track and the solder joint entering the product during wire welding, which would damage the internal brush contacts (all of the above are existing technologies). The protective cover 7 is made of stainless steel, and the end away from the rotor is integrally formed with a flange with pre-set mounting holes.

[0023] II. Rotor assembly steps; Assembly of conductive rings and insulating sheets: Conductive rings 4 and insulating sheets 6 are sequentially and alternately sleeved on the main shaft 1. The conductive rings 4 and the main shaft 1 are fixed with an interference fit (the interference fit can be achieved by heating the main shaft 1 or cooling the conductive rings 4 during assembly), ensuring that the conductive rings 4 rotate synchronously with the main shaft 1 without relative displacement. Adjacent conductive rings 4 are separated by insulating sheets 6. The insulating sheets 6 are also fixed with the main shaft 1 with an interference fit, and the adjacent conductive rings 4 provide axial positioning for the insulating sheets 6, preventing the insulating sheets 6 from shifting axially or circumferentially during rotation, while ensuring that the end face of the conductive rings 4 and the end face of the insulating sheets 6 are in close contact.

[0024] Shock absorber ring assembly: Shock absorber ring 9 and shock absorber ring 11 are respectively installed on the reserved installation sections at both ends of the spindle 1. The shock absorber ring 9 and shock absorber ring 11 are fitted onto the preset installation sections at both ends of the spindle 1 by a tight fit, and the inner side of the shock absorber ring is tightly fitted to the surface of the spindle 1, so as to achieve a wrap-around shock absorption installation of the spindle 1 and ensure that the shock absorber ring is not loose.

[0025] Pre-assembly of bearings and brush holders: The inner rings of bearing 10 and bearing 23 are respectively fitted onto the bearing mounting positions of the main shaft 1 (located on both sides of the conductive ring 4). The inner rings of bearing 10 and bearing 23 are interference-fitted with the main shaft 1. Then, the main shaft 1 with the bearings assembled is installed into the bearing position of the brush holder 8. The outer rings of bearing 10 and bearing 23 are transition-fitted with the bearing position of the brush holder 8. They can be manually pushed in or lightly pressed in to ensure that the bearings are installed stably and that the main shaft 1 can rotate smoothly.

[0026] Front cover fixing: Place a sealing gasket on the mating surface of the front cover 2 and the brush holder 8, align the front cover 2 with the end of the main shaft 1, and use bolts to connect the front cover 2 and the pre-set threaded hole at the end of the main shaft 1. Tighten the bolts until the sealing gasket is slightly compressed to achieve axial positioning of bearing 10 and bearing 23, while improving the overall sealing performance to prevent dust from entering the pipeline environment, thus completing the pre-assembly of the rotor part and the brush holder 8.

[0027] III. Stator Assembly Steps; Brush assembly 3 is soldered to the PCB: Use a special fixture to fix the soldering position of the brush assembly 3 to ensure that the soldering position is accurate. Then, solder the pins of the brush assembly 3 to the reserved soldering position of the PCB 5 (the soldering temperature and time must be adapted to the PCB 5 and the brush material to avoid damaging the components) to ensure that the soldering is firm and has good conductivity.

[0028] PCB and brush holder fixing: Place the PCB5 with the soldered brush assembly 3 on the PCB fixing position of the brush holder 8, aligning the clearance holes on the PCB5 with the threaded holes on the brush holder 8. First, fix the PCB5 to the brush holder 8 with screws. Then, cover the preset pressing position of the PCB5 with the pressure plate and fix the pressure plate to the brush holder 8 and PCB5 in sequence with screws (the pressure plate has preset through holes, the PCB5 has corresponding clearance holes, and the brush holder 8 has threaded holes). Tighten the screws to ensure that the PCB5 is not loose, thereby improving the stability of the connection between the PCB5 and the brush holder 8.

[0029] Protective cover assembly: Place the protective cover 7 on the outside of the brush holder 8, aligning the mounting ears of the protective cover 7 with the mounting holes of the protective cover on the brush holder 8. Fix the protective cover 7 to the pre-set mounting ears on the outer periphery of the brush holder 8 by means of screw connection, ensuring that the protective cover 7 completely covers the internal components of the stator (brush holder 8, PCB 5, brush bundle assembly 3), thereby protecting the internal components and completing the overall assembly of the stator.

[0030] IV. Overall assembly of rotor and stator and connection with pipeline robot; Overall conduction system inspection: After the rotor and stator are pre-assembled, manually rotate the main shaft 1 to check whether the rotor rotates smoothly without jamming; use a multimeter to measure the conduction resistance between the conductive ring 4 and the brush assembly 3 to ensure that the bristles of the brush assembly 3 are tightly attached to the surface of the conductive ring 4 and have good contact, forming a stable conduction path.

[0031] Connection with the pipeline robot fixing structure: Align the flange of the stator part (the integrated structure of the protective cover 7) with the mounting position of the pipeline robot fixing structure. The stator of the terminal equipment is fixed to the flange by bolts and the pre-set mounting holes on the flange. At the same time, the bottom of the brush holder 8 is also pre-set with mounting feet, which are fixed to the pre-set mounting seats of the equipment fixing structure by bolts, further improving the stability of the connection between the stator and the pipeline robot fixing structure and preventing the stator from shifting during operation.

[0032] Connection with the rotating components of the pipeline robot: Align the flat section in the middle of rotor 1 (the smooth cylindrical section in the middle of spindle 1) with the rotating components of the pipeline robot (such as the joint rotation axis). The flat section of rotor 1 is connected to the moving components of the terminal equipment via a key connection to achieve torque transmission. Fix the end of rotor away from front cover 2 to its own spindle 1 structure. The end of rotor 1 away from front cover 2 is connected to its own spindle 1 structure by welding to ensure the overall stability of the rotor structure. Subsequently, this end (the end of spindle 1 away from front cover 2) is connected to the clamping and positioning structure of the terminal equipment via a key connection and bolt 12 to prevent relative rotation after clamping, thus completing the connection between the rotor and the rotating components of the pipeline robot.

[0033] V. The work process is as follows: Initial state: The slip ring is installed at the rotation center of the pipeline robot. The rotor part (main shaft 1, conductive ring 4, insulating sheet 6, shock-absorbing ring 1-9 / shock-absorbing ring 2-11, etc.) is connected to the rotating structure of the pipeline robot and moves synchronously with the rotating structure. The stator part (brush holder 8, PCB 5, brush assembly 3, protective cover 7, etc.) is connected to the fixed structure of the pipeline robot and remains stationary. The conductive ring 4 of the rotor and the brush assembly 3 of the stator are in close contact through the principle of elastic overlap, forming a stable rotating communication system.

[0034] Signal and current transmission: When the pipeline robot is working, the rotating structure drives the rotor part to rotate synchronously, while the stator part remains stationary. The power supply and signal system of the pipeline robot are connected through the stator wires, and the rotor wires are connected to the actuators or sensors of the rotating parts. With the continuous contact between the rotor conductive ring 4 and the stator brush assembly 3, the control system can smoothly and uninterruptedly transmit signals and current during rotation, ensuring the normal operation of pipeline robot inspection, maintenance and other tasks.

[0035] Heat dissipation process: Since the working environment temperature of the pipeline robot can reach up to 150℃, and the friction between the conductive ring 4 and the brush assembly 3 will generate heat, the heat generated by the friction of the copper ring and the working environment will be superimposed and discharged through the spiral insulating sheet 6. The spiral structure increases the electrical gap between the rings and enhances the efficiency of heat dissipation, effectively preventing the slip ring from failing due to excessive temperature rise and ensuring that the slip ring works normally in high temperature environment.

[0036] Impact Resistance Process: When the pipeline robot operates inside the pipeline, it may encounter impacts. The shock-absorbing rings 9 and 11 at both ends can effectively resist external impact forces from the control system, absorb impact energy, protect the main shaft 1, conductive ring 4, brush assembly 3 and other components inside the slip ring from damage, maintain stable contact between the rotor and stator, and ensure smooth and reliable signal transmission.

[0037] Through the above implementation methods, this slip ring can meet the usage requirements of pipeline robots in high-temperature (150℃), narrow, and oxygen-deficient environments, achieving a long service life of over 10 years of continuous operation. Furthermore, it provides stable signal and current transmission, fully adapting to the operational requirements of pipeline robots. This utility model primarily focuses on ensuring service life through the following measures: 1. Operating Contact Resistance Test: The operating contact resistance value of the conductive slip ring directly affects signal quality, current transmission quality, and the operating stability of the conductive slip ring. The test method is to first install the conductive slip ring on the testing instrument, start it running, and then use a digital micro voltmeter to check whether the contact resistance value of the slip ring meets the standard (the standard is that the fluctuation value of each contact resistance should not exceed 10 milliohms).

[0038] 2. Life Testing: Point contact control is mainly used to test the lifespan of slip rings. We have comprehensive laboratory testing instruments that can simulate working environments, high or low temperatures, transmission signal frequencies, voltages, and slip ring speeds to test the working condition and lifespan of slip rings under different conditions.

[0039] 3. Insulation resistance test: The insulation resistance of the sheet is tested using an insulation withstand voltage tester, and its standard insulation resistance is not less than 1000 milliohms. If the test fails, the main reasons are short circuits in the slip ring and the slip ring material, or defects such as cracks and holes during potting that lead to a decrease in insulation performance.

[0040] 4. Structure of conductive slip ring: Spiral groove heat dissipation structure, which has a lifespan that is tens or hundreds of times longer than that of ordinary structures.

[0041] 5. Material of the conductive slip ring: Imported high-temperature precision bearing, stainless steel (-20℃~+200℃). Temperature-resistant, wear-resistant, and insulating material. 6. Slip ring assembly process: military-grade electroplating process.

[0042] Currently, the internal testing progress is approximately 430 million, and the operation is normal, as shown in the table below:

[0043] It should be noted that, in this utility model, unless otherwise explicitly specified and limited, the terms "sliding," "rotating," "fixed," and "equipped" should be interpreted broadly. For example, they can refer to welded connections, bolted connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections 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.

[0044] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A high-temperature, long-life slip ring based on a spiral groove heat dissipation structure, comprising a rotor part and a stator part, characterized in that: The rotor part includes a main shaft (1), a conductive ring (4) and an insulating sheet (6). The conductive ring (4) and the insulating sheet (6) are spaced apart and fitted on the main shaft (1). The insulating sheet (6) has a spiral groove structure. The stator includes a brush holder (8), a PCB (5) and a brush assembly (3), the brush assembly (3) being soldered onto the PCB (5), and the PCB (5) being fixed to the brush holder (8). The rotor and stator are connected by bearings, and the conductive ring (4) is in elastic contact with the brush assembly (3) to transmit signals and current.

2. The high-temperature, long-life slip ring based on a spiral groove heat dissipation structure according to claim 1, characterized in that, The rotor part also includes a front end cover (2), a shock-absorbing ring one (9), a shock-absorbing ring two (11), a bearing one (10) and a bearing two (13). The first damping ring (9) and the second damping ring (11) are respectively installed at both ends of the main shaft (1). The inner rings of the first bearing (10) and the second bearing (13) are interference-fitted to the main shaft (1), and the outer rings are transition-fitted to the bearing position of the brush holder (8).

3. The high-temperature, long-life slip ring based on a spiral groove heat dissipation structure according to claim 2, characterized in that, The front cover (2) is connected to the end of the main shaft (1) by bolts to achieve axial positioning of bearing one (10) and bearing two (13).

4. The high-temperature, long-life slip ring based on a spiral groove heat dissipation structure according to claim 1, characterized in that, The conductive ring (4) and the main shaft (1) are both interference fits, as are the insulating sheet (6) and the main shaft (1).

5. The high-temperature, long-life slip ring based on a spiral groove heat dissipation structure according to claim 1, characterized in that, The stator section also includes a pressure plate and a protective cover (7). The pressure plate presses and fixes the PCB (5) to the brush holder (8). The protective cover (7) covers the outside of the brush holder (8) and is fixed by screws.

6. The high-temperature, long-life slip ring based on a spiral groove heat dissipation structure according to claim 5, characterized in that, The protective cover (7) is made of stainless steel, and the end away from the rotor is integrally formed with a flange, which has mounting holes.

7. The high-temperature, long-life slip ring based on a spiral groove heat dissipation structure according to claim 1, characterized in that, The brush assembly (3) is made of imported copper alloy and is welded to the PCB (5) using a special fixture.

8. The high-temperature, long-life slip ring based on a spiral groove heat dissipation structure according to claim 1, characterized in that, The conductive ring (4) is made of imported wear-resistant material and its surface is treated with a special gold plating process of military grade.

9. The high-temperature, long-life slip ring based on a spiral groove heat dissipation structure according to claim 1, characterized in that, The insulating sheet (6) is made of imported high-temperature resistant insulating material.

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