As a key device for power transmission, the composite shielded insulated tubular busbar body will generate Joule heat due to the passage of current during operation. If the heat cannot be effectively dissipated, the internal temperature will rise, affecting the insulation performance and equipment life. Sealing is an important factor in preventing the intrusion of external dust and moisture and ensuring the safe operation of the equipment. Therefore, how to balance sealing and heat conduction efficiency in heat dissipation design has become the core issue to ensure the stable operation of the composite shielded insulated tubular busbar body.
Selecting metal materials with high thermal conductivity as the conductor and shell matrix of the composite shielded insulated tubular busbar body, such as copper or aluminum alloy, can quickly conduct the heat generated inside to the outside. At the same time, in the selection of insulating materials, new composite materials with good insulation and certain thermal conductivity are used, such as epoxy resin-based insulating materials with added thermal conductive fillers. These fillers (such as aluminum oxide and aluminum nitride) can construct a heat conduction path without destroying the insulation performance and improve the thermal conduction efficiency of the insulation layer. Through material-level optimization, the heat dissipation capacity of the tank body is enhanced from the source, and the dependence on the ventilation and heat dissipation structure is reduced, thereby leaving room for sealing design.
The double-layer tubular structure design is adopted, and a closed air interlayer or a low thermal conductivity insulation material is formed between the inner and outer layers, which can not only play a certain role in heat insulation and reduce the influence of the external environment on the temperature of the internal conductor, but also set a heat dissipation channel in the interlayer. For example, heat dissipation fins are arranged in the interlayer, and heat is transferred to the surface of the fins by heat conduction, and then the heat is dissipated by natural convection or forced convection. In addition, at the connection of the composite shielded insulated tubular busbar body, a special interface structure with a sealing rubber ring is designed to achieve a good sealing effect while ensuring the tightness of the electrical connection, and prevent the external environment from interfering with the heat dissipation system.
An intelligent temperature sensor is installed to monitor the internal temperature of the composite shielded insulated tubular busbar body in real time. When the temperature exceeds the set threshold, the ventilation system is automatically started. The vent adopts a structural design with a one-way valve and a sealing strip. When there is no ventilation, the one-way valve is closed and the strip is pressed tightly to ensure the sealing of the tank body; when ventilation, the one-way valve is opened, and the fan is forced to supply or exhaust air to accelerate the air flow to take away the heat. At the same time, combined with the humidity sensor, when the humidity of the external environment is detected to be high, the sealing measures are automatically strengthened to reduce the entry of moisture, ensuring that the dynamic balance of heat dissipation and sealing can be achieved under different working conditions.
The shell of the composite shielded insulated tubular busbar body is surface treated, such as anodizing, spraying heat dissipation paint, etc. Anodizing can form a porous oxide film on the metal surface, increase the surface area, and improve the heat dissipation efficiency. At the same time, the oxide film itself has certain sealing and anti-corrosion capabilities. Heat dissipation paint can further reduce the surface thermal resistance and accelerate the radiation of heat. In addition, special sealants are used to fill the contact parts between the insulation layer and the conductor and the shell to eliminate tiny gaps, prevent moisture and dust from invading, and ensure good heat conduction to avoid local overheating due to poor contact.
The heat dissipation process of the composite shielded insulated tubular busbar body is simulated and analyzed through thermal simulation software, the structural design and material selection are optimized, and the temperature distribution and heat conduction efficiency under different working conditions are predicted. In the actual production process, the composite shielded insulated tubular busbar body is subjected to strict sealing performance tests, such as airtightness test and rain test, to ensure that the sealing meets the requirements; at the same time, a temperature rise test is carried out to monitor the temperature change under the rated current and verify the effectiveness of the heat dissipation design. According to the test results, the design scheme is repeatedly adjusted and optimized to continuously improve the balance between heat dissipation and sealing performance.
The heat dissipation design of the composite shielded insulated tubular busbar body can effectively balance the sealing and heat conduction efficiency through the application of high-performance materials, special structural design, intelligent control system, surface treatment process and strict test optimization. This balance not only ensures the stable operation of the composite shielded insulated tubular busbar body in complex environments, improves the safety and reliability of power transmission, but also provides important reference and reference for the design of similar electrical equipment.
