In the manufacturing of dry type transformers, the density of the insulation system directly determines the electrical performance and service life of the equipment. The Pressure-Changed Vacuum Drying Oven for Dry Type Transformer effectively solves the challenge of deep moisture removal by combining an innovative "variable pressure" process with a vacuum environment. It is core equipment for improving product quality and shortening production cycles.
Core Process: Variable Pressure Cycle for Deep Moisture Removal
This equipment utilizes an advanced "Variable Pressure Method." While providing a high-vacuum environment, it alternately introduces dry air or nitrogen to create periodic pressure changes inside the tank. This "breathing" cycle breaks the dynamic equilibrium of moisture evaporation and condensation, preventing the formation of a "completely dry surface layer." By enhancing convective and conductive heat transfer, it rapidly vaporizes and extracts moisture from the micropores deep within the windings, achieving uniform drying from the inside out.
Outstanding Performance and Structural Advantages
Precise Temperature Control and Anti-Aging: Heated by thermal oil or steam pipe arrays and controlled by an automated computer system, the oven strictly follows preset temperature curves. The gentle and uniform heating prevents local overheating and aging of insulation materials, ensuring the mechanical and electrical properties of epoxy resin .
Smart Endpoint Judgment: The system monitors temperature, vacuum degree, and pressure changes in real time. It automatically determines the drying endpoint through scientific pressure rise rate tests, eliminating the risks of over-drying or under-drying.
High Sealing and High Vacuum: The tank is constructed from high-strength steel with precision welding and equipped with high-performance vacuum pumps. This ensures ultimate vacuum levels and an extremely low leakage rate, providing a pristine environment for insulation curing.
Extensive Industrial Applications
Dry Type Transformer Manufacturing: Thoroughly removes air and moisture from windings before and after the VPI (Vacuum Pressure Impregnation) process, ensuring perfect resin penetration and keeping partial discharge levels extremely low (e.g., <5 pC).
Epoxy Resin Casting: Performs vacuum degassing and drying before casting, and provides a constant temperature and pressure curing environment afterward, ensuring the cured product is free of bubbles and cracks.
Special Motors and Capacitors: Provides oxidation-free drying and insulation curing for high-voltage motor stator windings and large power capacitors, enhancing moisture resistance, pollution resistance, and short-circuit withstand capability.
Why Choose Our Equipment?
We are dedicated to providing safe and energy-efficient insulation treatment solutions for global power equipment manufacturers. Featuring a modular design, our equipment requires a short on-site installation and commissioning cycle while offering exceptional operational stability.
Compared to traditional processes, it reduces drying time by approximately 30%-40%, significantly lowering energy consumption and manufacturing costs. Whether for a new production line or equipment upgrades, we can provide customized drying tank configurations and process guidance tailored to your product specifications and capacity requirements.