Application of pultrusion structural material

At present, as electrical equipment continues to develop towards high voltage and large capacity, the performance of insulating materials faces higher requirements. As a high-performance insulating material with unique structure and excellent performance, pultrusion structural material have been widely used in the electrical field. It is an insulating component made by combining fiber-reinforced materials and resin matrix using special processes. It has significant characteristics such as high mechanical strength, good insulation performance, and strong heat resistance.

Material properties of the pultrusion structural material

The pultrusion structural material is mainly composed of reinforcing fibers and resin matrix. Common reinforcing fibers include glass fiber, carbon fiber and aramid fiber; the resin matrix is mostly epoxy resin, unsaturated polyester resin, etc. The combination of these materials gives the pultrusion structural material excellent mechanical properties and insulation properties.

Manufacturing process of pultrusion structural material

The manufacturing process of pultrusion structural material covers multiple links such as fiber pretreatment, resin impregnation, molding and curing, and post-processing. In the fiber pretreatment stage, the fiber surface needs to be treated to improve its interface bonding with the resin; the resin impregnation stage must ensure that the fiber is fully impregnated; the molding and curing process precisely controls the temperature and time to promote the complete curing of the resin; finally, after post-processing steps such as cutting and polishing, the final product can be obtained.

The performance advantages of the pultrusion structural material

The performance advantages of the pultrusion structural material are mainly reflected in the following three aspects: first, the insulation performance is extremely excellent, the volume resistivity is high, the dielectric strength is large, and it can effectively avoid current leakage and arc generation; second, the mechanical strength is high, and its tensile strength and bending strength are significantly improved compared with traditional insulation materials; third, the heat resistance is good, and it can work stably for a long time in a high temperature environment without failure. It is these characteristics that make the pultrusion structural material an indispensable key component in high-voltage electrical equipment.

Application of pultrusion structural material

Application of pultrusion structural material in power systems

1. High-voltage switchgear

In high-voltage switchgear, pultrusion structural material is responsible for supporting and fixing conductive parts, and at the same time play a role in insulation isolation. Taking high-voltage circuit breakers as an example, pultrusion structural material can fix components such as contacts and arc extinguishing chambers in the proper position, and ensure their insulation performance between each other and between them and the casing. Its excellent insulation properties can withstand high-voltage electric fields, prevent the generation and spread of arcs, and ensure the safe and reliable operation of circuit breakers during the opening and closing process.

2. Transformer

As an important electrical equipment in the power system, the transformer has pultrusion structural material used for insulation support and isolation during its manufacturing process. The pultrusion structural material plays a role of separation and insulation between the windings of the transformer and between the windings and the iron core to prevent discharge and short circuit between different potentials. In addition, the pultrusion structural material can also withstand the mechanical and thermal stresses generated during the operation of the transformer, ensuring the long-term and stable operation of the transformer.

Application of pultrusion structural material in industrial machinery

In motors and generators, pultrusion structural material is mainly used as insulating parts such as slot wedges and end supports. Their high mechanical strength can withstand the centrifugal force generated by high-speed rotation, and their excellent heat resistance can also adapt to the temperature rise during motor operation. In variable-frequency motors, the corona resistance of pultrusion structural material is particularly critical, which can effectively resist the damage of high-frequency pulse voltage.

Industrial automation equipment often operates in harsh environments, at which time the chemical corrosion resistance and weather resistance of pultrusion structural material can be fully utilized. In equipment such as robotic arms and conveying systems, pultrusion structural material is used as insulating rails, supports, etc., which not only provide reliable insulation protection, but also reduce the weight of the equipment.