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- Energy storage hydraulic control system with reliable energy monitoring
- Energy storage high-flow hydraulic forming system
- High-precision digital servo synchronous actuation system
- Energy storage high-flow electro-hydraulic servo test system
- Energy storage, large flow compensation and balance hydraulic control system
- High-frequency fatigue testing system
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- Product
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Solution
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Energy storage hydraulic control system with reliable energy monitoring
- Energy storage high-flow power source start-up system
- Energy-saving electro-hydraulic control system
- Hydro-controlled system of electric furnace energy storage device power source
- Emergency control high-pressure accumulator power source for valves
- Governor energy storage power source electro-hydraulic control system
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Energy storage high-flow hydraulic forming system
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High-precision digital servo synchronous actuation system
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Energy storage high-flow electro-hydraulic servo test system
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Energy storage, large flow compensation and balance hydraulic control system
- High-frequency fatigue testing system
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Energy storage hydraulic control system with reliable energy monitoring
- Service
- Calculation
High-precision synchronous servo-hydraulic control system for cylinder valves, etc.
Published Time:
2024-12-30 18:04
Category:
Solution
High-Precision Digital Servo Synchronous Actuation System
Cylinder valve multi-relay digital servo synchronous hydraulic control system
Cylinder valve synchronous hydraulic control system with electric water closing function
Under operating conditions characterized by large inlet valves or substantial load interfaces, valves such as cylindrical valves can be employed as the actuating mechanism for opening and closing, thereby replacing a single‑cylinder hydraulic drive with a multi‑cylinder configuration. Taking a cylindrical valve driven by six hydraulic cylinders as an example, during normal valve opening and closing, the water flow generates impact loads that vary in both timing and cross‑sectional position, manifesting as time‑varying dynamic loads. Consequently, the cylindrical valve must exhibit highly precise synchronous motion during operation; this requires multiple hydraulic cylinders to maintain high‑frequency responsiveness and real‑time adjustment of the hydraulic actuator’s stroke, ensuring accurate synchronized movement.
Therefore, actuating elements with synchronization capabilities should be employed. Earlier solutions included mechanical synchronization devices such as synchronous motors, or digital hydraulic cylinders featuring screw‑drive mechanisms. While synchronous motor‑based systems maintain reliable operation under normal cycling conditions, they suffer from a gradual loss of synchronization accuracy over time due to mechanical wear, which can introduce additional torque during valve actuation and result in closing characteristics that fail to meet control requirements. By contrast, digital hydraulic cylinders with screw‑drive architectures address the issue of declining synchronization accuracy caused by long‑term mechanical wear; however, this approach gives rise to two additional challenges: first, cavitation generated during screw‑thread operation can lead to structural fractures and shutdowns; second, encoder‑based position counting at high‑precision levels is prone to lost counts, and the need to achieve synchronization accuracy often necessitates custom‑made, non‑standard cylinders, complicating maintenance.
Schwerll’s Solution: Given the stringent safety requirements of operating conditions in hydropower, chemical processing, and similar industries, synchronous systems must also address the challenge of achieving reliable, high‑precision synchronous shutdown under power‑loss scenarios. Employing sprockets and gravity‑based mechanisms is clearly an outdated approach. Therefore, taking into account the functional characteristics of electro‑hydraulic control systems during power outages, it remains essential to ensure high‑precision synchronous closure even when subjected to dynamic hydraulic loads. Conventional methods typically rely on mechanical gravity‑chain drive mechanisms to accomplish synchronous shutdown in the event of a power failure. In contrast, Schwerll’s solution employs multiple servo cylinders equipped with high‑response servo valves, a multi‑channel synchronized cylinder‑valve architecture, and a piston‑type accumulator system with emergency‑operation capability to construct a hydraulically controlled synchronization system. This integrated approach resolves the dual challenges of maintaining high‑precision, long‑term reliability under dynamic loading conditions and ensuring dependable, high‑accuracy forced shutdown during power‑loss events.
The servo‑synchronization module system employs a piston accumulator with energy monitoring as its power source and utilizes a purpose‑built synchronized hydraulic cylinder valve to achieve dynamic water‑tight shutoff in the event of a power failure, significantly enhancing the precision of synchronous motion. Moreover, the system is compactly integrated, ensuring long‑term safe operation while consistently maintaining high‑precision synchronization.
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What are the causes of severe pressure drop and shortened service life in bladder-type accumulators?
What are the causes of severe pressure drop and short service life in bladder-type accumulators? The structure of a bladder-type accumulator is quite simple, consisting mainly of an oil chamber surrounding the bladder and a gas chamber equipped with a gas‑tight seal. During operation, the hydraulic fluid must be connected to the hydraulic circuit; when the system pressure rises, the fluid flows into the accumulator, compressing the gas until the pressure in the system pipeline stabilizes.
How can we reduce failures when an accumulator malfunctions?
If an accumulator malfunctions, its performance will be directly affected, potentially leading to abnormal pressures and system failure. Therefore, it should receive close attention during routine operation, and appropriate measures must be implemented to mitigate risks. So, how can we minimize failures when an accumulator malfunctions? The following sections address this issue.
Accumulators are intriguing components in hydraulic systems, analogous to capacitors in electrical circuits or springs in mechanical systems. As critical energy‑storage elements, they serve a variety of sophisticated functions, including hybrid‑power applications, shock absorption, pressure stabilization (and sometimes flow‑rate regulation), and the rapid release of stored energy to simulate impacts.
Is a bladder-type accumulator suitable for use in series with gas cylinders or cylinder banks?
1. Bladders typically have a shorter service life than piston‑type accumulators, and their quality varies significantly among different manufacturers. 2. Many factors can shorten a bladder’s lifespan and lead to rupture, including variations in the bladder’s intrinsic quality and durability; improper handling during assembly (e.g., failure to pre‑fill with fluid for lubrication); incorrect procedures during pre‑charging (e.g., insufficiently slow inflation); errors in calculating the pre‑charge pressure; oil‑port flow velocities approaching or exceeding 7 m/s; single‑stroke reciprocation times of 10 seconds or less when used for energy storage; collisions between the bladder and check valves during operation; large temperature fluctuations (including significant seasonal differences); prolonged lateral vibration; fluid‑induced corrosion; and inertial impacts from minute solid contaminants in the working medium, among others.
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