Mastering Complex Projects with Precision & Technology
The Challenge: Ultra-High Speed Kinetic Storage
Flywheel Energy Storage Systems (FESS) operate by accelerating a heavy kinetic rotor to massive speeds to store electrical energy. To maintain extreme efficiency and prevent intense aerodynamic drag on the spinning rotor, these systems must be housed in flawlessly sealed vacuum chambers.
Fabricating these containment vessels is incredibly demanding. The metal structure acts as a critical safety housing against immense centrifugal forces, demanding perfectly penetrated welds. Simultaneously, the interior bearing housings, O-ring seal grooves, and flanges require ultra-tight machining tolerances to guarantee rotor alignment and prevent even microscopic drops in the system's deep vacuum over decades of operation.
The Manufacturing Process at Openex
Relying on our fully integrated massive manufacturing ecosystem, our engineering team controlled every phase of production—from the heavy rolling and submerged arc welding (SAW) to Post-Weld Heat Treatment (PWHT) and precise final dimensioning on our gantry mills.
Assembled containment vessel featuring thick structural ribs to withstand vacuum forces and ensure dynamic rotor safety.
1 Void-Free Submerged Arc Welding
Zero porosity is permitted for deep vacuum applications. Thick plates were formed and continuously welded under strict AWS codes with deep-penetration SAW.
2 Heavy Vertical Turning & Milling
After extensive thermal stress-relief in our large furnaces to prevent future distortion, large-scale VTLs machined the seal grooves and rotor bearing lands perfectly parallel.
Testing & Quality Assurance: Proving the Vacuum
You cannot compromise on the integrity of a Flywheel system. Before final protective coatings were applied, Openex initiated an aggressive inspection protocol to verify precision and atmospheric integrity.
3D CMM Metrology
Our heavy Coordinated Measuring Machines verify that bearing alignment tolerances were held down to tight microns.
Helium Mass Leak Checking
Each assembled unit underwent strict vacuum leakage testing, ensuring hermetic containment capable of maintaining a deep space-like vacuum environment.
Project Execution Details
| Project Focus | Kinetic Energy Containment Vessels (Vacuum Chambers) |
|---|---|
| Industry Served | Renewable Energy, Microgrid Regulation, Power Quality Systems. |
| Key Manufacturing Technologies | Heavy Plate Rolling, Submerged Arc Welding, Deep Machining on VTL, and Thermal PWHT. |
| Stringent Q/C Standards | Zero-porosity Ultrasound, Helium Vacuum Leak Verification, CMM Dimensional Reporting. |
Through exceptional quality control and complete under-one-roof control over welding, machining, and heat treating, Openex was able to dramatically decrease the customer's manufacturing lead time. These highly complex assemblies deployed directly to renewable energy hubs and utility data centers worldwide, acting as safe, incredibly reliable buffers for the electrical grid.