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Open Volume Calculator →Traditional flow‑synchronization systems, such as those used for penstock gate valves in hydropower stations, typically require six sets of synchronizing servomotors. These systems rely on either synchronous motors or mechanical linkages—often employing a mechanical lead‑screw drive to achieve synchronization—but they suffer from issues like reduced accuracy due to wear and tear, as well as potential lead‑screw breakage caused by air pockets in the mechanical transmission. In contrast, the SCHWERLL hydraulic servo digital control system achieves digital synchronization via a hydraulic servo control loop and employs a multi‑channel hard‑sync cylinder design driven by piston accumulators equipped with energy‑monitoring capabilities. This enables emergency shutdown functionality under fault conditions, ensuring long‑term repeatability of synchronization accuracy and high‑precision hard synchronization even during complete power loss. Meeting the stringent requirements of applications such as penstock gate valves—where high precision, excellent repeatability, and reliable emergency synchronization under total power‑outage conditions are critical—the SCHWERLL system represents the optimal synchronization solution.
Contact Schwerll engineering sales directly for custom volume sizing, pressure ratings (up to 207 MPa), and volume pricing.
Traditional flow‑synchronization systems, such as those used for penstock gate valves in hydropower stations, typically require six sets of synchronizing servomotors. These systems rely on either synchronous motors or mechanical linkages—often employing a mechanical leadscrew to achieve synchronization—but suffer from issues like reduced accuracy due to wear and tear, as well as potential lead‑screw breakage caused by air pockets in the mechanical drive assembly. In contrast, the SCHWERLL hydraulic servo digital control system achieves digital synchronization via a hydraulic servo control loop and employs a multi‑channel hard‑sync cylinder design driven by a piston accumulator with energy‑monitoring capabilities. This enables emergency shutdown under fault conditions while ensuring long‑term repeatability of synchronization accuracy and high‑precision hard synchronization even during complete power loss. Meeting the stringent requirements of applications such as penstock gate valves—where high precision, excellent repeatability, and reliable emergency synchronization under total power failure are critical—the SCHWERLL system represents the reliable synchronization solution for mission-critical applications.
Meanwhile, in contrast to the high‑precision mechanical screw‑driven synchronization technology—where six‑cylinder synchronization requires non‑standard commissioning and matching adjustments during product replacement—the SCHWERLL hydraulic servo digital synchronization system fully standardizes the supply of servomotors. Its precision is achieved through real‑time, high‑accuracy tracking and adjustment by the servo valve, rather than relying on mechanical symmetry, thereby significantly simplifying system installation, commissioning, and maintenance.
SCHWERLL high-precision synchronous digital servo cylinder system—system integration product composition:
1. Digital hydraulic cylinder products with servo valves (hydraulic servo‑valve‑based synchronization), controllers, and hydraulic cylinders;
2.NG ≤ 25mm Adoption of a digital valve (direct drive by a servo motor);
3.NG > 25mm Adoption of a pilot-operated, high‑response servo proportional valve + Digital valve products for servomotors;
3.1 Closed-loop control and staged shutdown eliminate the risk of mechanical overspeed.
3.2 An integrated design combining the valve and the servomotor is feasible, or alternatively, a separate arrangement of a proportional servo valve and a servomotor can be adopted, facilitating disassembly, assembly, and maintenance.
4. In high-flow applications, the conventional approach employs a synchronous motor in series. NG6 10 16 of the servo valve (in high‑flow applications, after mechanical overspeed, it achieves hydraulic synchronization);
5. System accumulator system + The synchronous cylinder achieves high-precision synchronized motion in the de-energized state (closed).
