The metal bellows sealed (internal oil) oil conservator consists of a frame, core, outer cover, piping, oil level indication, and alarm devices. Both the product's appearance and the core are runway-shaped. The core is made of high-quality stainless steel sheets, and the outer cover is equipped with an oil level indicator window and a ventilation window. The main pipeline of the oil conservator is connected to the internal cavity of the core, the filling and draining pipelines are drawn from the main pipeline, and the exhaust pipe is drawn from the top of the core for vacuuming and venting.
The lower end of the core is fixed, while the upper end is a freely extensible moving end. Transformer oil is contained inside the core and communicates with the transformer oil tank through the lower main pipeline. When the transformer oil expands or contracts in volume due to temperature changes, the core correspondingly stretches or compresses vertically, altering the volume of the oil chamber inside the core, thus achieving volume compensation for transformer oil under fully sealed conditions.
In conventional internal oil-type metal bellows oil conservators, multiple independent runway-shaped cores are arranged in parallel. Therefore, for internal oil products of the same width, the lengths are segmented, generally in three types, unlike external oil horizontal products where the length can vary continuously.
