The weight balance design of the double-leaf stainless steel vault door's middle door is a key technical element in ensuring long-term stable operation and reducing opening and closing resistance. Through multi-dimensional structural optimization and material selection, this design achieves precise weight distribution, ensuring safety while enhancing ease of operation and durability.
The main structure of the double-leaf stainless steel vault door's middle door is constructed from high-strength stainless steel. Its density and rigidity dictate that weight distribution must balance strength with lightweightness. Ribs are typically incorporated into the door's interior, distributed in a "well" or "M" pattern to distribute concentrated loads around the door frame and prevent deformation caused by localized stress concentration. For example, the ribs at the edges of the door leaf are thicker than in the center, effectively offsetting the torque generated during opening and closing, ensuring the door maintains balance at all angles and reducing resistance fluctuations caused by a shifted center of gravity.
The hinge system design is central to weight balance. Double-leaf stainless steel vault door middle doors often utilize high-torque adjustable damping hinges. Their main body is constructed from high-strength alloy steel or 304/316 stainless steel, boasting tensile and yield strengths far exceeding those of ordinary hinges, capable of withstanding the impact forces of prolonged door opening and closing. The hinge's internal structure utilizes a thickened leaf plate and reinforced connecting arm, increasing the leaf plate's thickness and ensuring a strong connection to the door and cabinet. Double reinforcing ribs, arranged in a triangular pattern, are added at the junction of the connecting arm and leaf plate to further distribute the torque generated by the door's own weight, preventing stress concentration and fracture at the connection. This design ensures that the hinge evenly bears the weight during door opening and closing, avoiding increased resistance caused by excessive force on one side.
The torque adjustment mechanism is a key technology in balanced design. Its combination of multiple friction plates and a high-strength pressure spring ensures consistently high and stable torque output. Select models feature a torque locking ring, threaded into the main body. Tightening the locking ring after adjustment stabilizes the friction plate pressure and prevents torque shifting caused by vibration or prolonged use. This design prevents the door from dropping or shifting at any opening angle, ensuring operators can open and close with minimal force and significantly reducing resistance.
An optimized damping system further enhances balancing performance. The double-leaf stainless steel vault door's middle door damping system utilizes a dual hydraulic oil chamber + high-flow orifice design to independently control the door's opening and closing processes. High-viscosity silicone-based damping oil is contained within the orifice, which slowly releases fluid through flow restriction, controlling the door's rotation speed and preventing rapid opening and closing caused by the door's weight. The orifice diameter is customized based on the door's weight to ensure the damping force is balanced with the door's weight, avoiding excessive damping that would make opening difficult, while also preventing insufficient damping that would be ineffective. Before the door fully closes, the damping force increases slightly to further slow its closing speed, ensuring a gentle return to its original position without clashing noise or structural damage.
The adaptable structural design enhances balancing flexibility. Waist-shaped adjustment holes in the leaf plate allow for fine-tuning of the hinge position within a certain range, compensating for machining errors between the door and cabinet, ensuring the door is flush with the cabinet after installation, without offset or height differences. High-strength hexagon socket head screws are used with lock washers to prevent the screws from loosening under heavy loads and causing hinge displacement, ensuring a secure, long-lasting connection. This design ensures the door maintains precise alignment with the cabinet during opening and closing, reducing frictional resistance.
The weight-balanced design of the double-leaf stainless steel vault door middle door achieves precise weight distribution through the coordinated optimization of materials, structure, torque adjustment, damping system, and adaptable structure. This design not only reduces opening and closing resistance and improves ease of operation, but also extends the door's service life by distributing stress and enhancing connection strength, ensuring the safe operation of the vault door.
