-
- 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
-
-
- Product
-
Solution
-
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
-
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
-
Energy storage hydraulic control system with reliable energy monitoring
- Service
- Calculation
High-speed servo hydraulic cylinder with displacement sensing device
Published Time:
2024-11-05 17:31
Category:
Solution
High-Precision Digital Servo Synchronous Actuation System
Multi-executive agency hydraulic drive synchronous actuation system
High-speed hydraulic cylinder with displacement detection device
Servo hydraulic cylinder with a piston rod displacement sensor:
To implement closed-loop control of hydraulic systems—such as flow‑rate regulation—it is essential to accurately measure piston‑rod displacement in real time. In particular, for long‑stroke, high‑speed piston cylinders, it is necessary to use servo‑hydraulic cylinders equipped with a precision piston‑rod displacement measurement system.
A. Based on the control requirements of hydraulic systems, many operating conditions necessitate the measurement of piston‑rod displacement. Depending on accuracy and stroke‑length specifications, different methods are employed for measuring piston‑rod displacement in various applications:
- Magnetostrictive displacement sensors, including redundant magnetostrictive sensor assemblies used in critical safety‑control applications, offer a maximum measurement range of 7 to 8 meters; however, they typically achieve higher accuracy within the 1.5‑meter range.
- Pulse sensors constructed from non‑magnetic materials represent a mature solution that offers superior cost‑effectiveness and measurement accuracy. These sensors are typically mounted on the end caps of hydraulic cylinders, where they detect pulses generated by alternating segments of non‑magnetic material affixed to the piston rod, thereby providing precise displacement signals. This piston‑displacement sensing approach is easy to install and boasts the advantage of measurement accuracy that remains unaffected by the magnitude of the measured displacement, making it highly promising for future applications.
- A non-contact laser sensor is used to measure piston displacement, for example, when installed in a wave-compensation hydraulic actuator.
B. Product Features of the Xiwel Servo Hydraulic Cylinder:
- In applications involving high-speed motion, high-speed servo hydraulic cylinders must be used; for example, when the piston rod displacement speed reaches 10 m/s, 15 m/s, or 20 m/s, a high-speed servo hydraulic cylinder is required.
- When a high-speed servo hydraulic cylinder is equipped with a precision piston displacement sensor, closed-loop control of the system can be achieved. By accurately measuring the piston rod’s displacement in real time, closed-loop regulation of the system’s flow rate, velocity, and acceleration becomes possible.
Recommended News
SCHWERLL has successfully completed the manufacturing of CNOOC’s super‑flow anti‑recoil valves and the associated super‑flow testing. The products have passed all performance verification tests and flow‑rate assessments, and have obtained certification from CCS, the classification society. Anti-Recoil Valve (AVR), also referred to in the industry as an anti‑backflow valve.
To meet the demands of operating conditions in vehicles, marine vessels, aerospace, and mobile applications—particularly where equipment weight or available installation space is constrained—SCHWERLL began, in 2025, developing miniaturized nitrogen‑boosting units based on its established standard designs. These compact units have been successfully deployed in nitrogen‑boosting systems for marine vessels and heavy‑duty vehicles.
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.
Products of Different Specifications
Products
Application Fields
Application
Partners
Partner
Exporting Countries and Regions
Exported Countries
Schwerll Fluid Control (Beijing) Co., Ltd.
Email: schwerlltec@schwerll.com.cn
Address: Building 39B, Floor 1, No. 16, Huanke Zhong Road, Tongzhou Park, Zhongguancun Science and Technology Park, Tongzhou District, Beijing
Welcome to access our company through the following methods
Copyright © 2024 Schwell Energy Storage Technology (Beijing) Co., Ltd.