What is an oil strut belt?

The oil strut belt is an important structural component in oil-immersed transformers. It is mainly used to support and fix the transformer windings, and form oil channels to promote the flow and heat dissipation of insulating oil at the same time. The design and installation of the oil strut belt directly affect the cooling effect, mechanical stability and operational reliability of the transformer.

Structure and materials

The oil strut belts are mainly composed of rectangular stays and glue-coated diamond-shaped insulation paper. The rectangular stays are made of 100% pure wood pulp insulation paperboard and must not contain any foreign matter and impurities that affect electrical performance. Any processed part must not have cracks and delamination, no concave and convex or deep tooth marks exceeding 20μm, no spots, burrs, no carbonization, and color differences due to density and processing are allowed.

Types of oil strut belt

Oil strut belts can be divided into many types according to different materials, structures and uses. The following are some common types of oil strut belts:

Paper oil strut belts: Made of insulating sheet, it has the advantages of low cost and easy processing, but the mechanical strength is relatively low.

Laminated paperboard oil strut belts: Made of multiple layers of insulating sheet, it has high mechanical strength and electrical insulation performance.

Oil strut belts with oil gaps: Oil gap holes are opened on the stays to improve oil flow distribution and reduce coil temperature rise. This type of stay has a complex structure, but has good heat dissipation effect.

Customized oil strut belts: Design and manufacture according to customer specific requirements to meet the needs of specific transformers.

Application of oil strut belts

Oil strut belts are widely used in oil-immersed transformers, especially high-voltage and large-capacity transformers. In these transformers, the role of oil strut belts is particularly important because they are directly related to the heat dissipation performance and operation safety of the transformer. In addition, oil strut belts are also used in other power equipment that require insulation and heat dissipation, such as reactors, transformers, etc.

Specific applications include:

‌Support and fix the oil channel‌: The oil strut belts effectively support and fix the oil channel of the transformer through their structural design, ensuring the stability and reliability of the oil channel.

‌Improve heat dissipation effect‌: Reasonable oil channel design can enhance the heat dissipation effect of the transformer and ensure the stability and safety of the transformer during long-term operation.

‌Enhance mechanical strength‌: The design and material selection of the oil strut belts give it high mechanical strength and can withstand various stresses during the operation of the transformer.

Maintenance of oil strut belts

Check the status of the oil strut belts regularly to ensure that they are not loose, deformed or damaged.

Clean the surface of the oil strut belts regularly to prevent dust and oil accumulation from affecting their performance.

If the oil strut belts are found to be damaged or aged, they should be replaced or repaired in time to ensure the normal operation of the transformer.

The oil strut belts are important structural components in oil-immersed transformers, with functions such as supporting and fixing the oil channel, optimizing heat dissipation and enhancing mechanical strength. Through reasonable design, manufacturing and installation, the oil strut belts can significantly improve the cooling effect, mechanical stability and operational reliability of the transformer. With the advancement of technology and the development of the market, the oil strut belts will play a more important role in the future, providing strong support for the stable operation and efficient development of the transformer.