Servo valve is the core component of hydraulic control system, which is widely used in aerospace, construction machinery, metallurgical equipment and automatic production line. In practical application, due to complex working conditions and high control requirements, it is often difficult for general servo valves to meet the performance requirements of specific systems. Therefore, the customization of special servo valve has become an important means to improve the system performance and ensure the stable operation of equipment.
First, the necessity of customization of special servo valve
Although the universal servo valve has certain adaptability, its performance may not meet the actual needs when faced with special media, extreme temperature, high pressure, high speed or high precision control requirements. For example, in the aerospace field, servo valves need to work stably in high temperature and high frequency vibration environment; In metallurgical industry, servo valves may have to withstand the test of high temperature dust and corrosive media. At this time, customizing the special servo valve becomes the key to improve the reliability and control accuracy of the system.
Second, the main consideration factors of customized servo valve
1. Working environment requirements: including temperature range, medium type (such as hydraulic oil, water, gas, etc.), explosion-proof grade, protection grade, etc.
2. Requirements of performance parameters: such as flow range, pressure grade, response time, control accuracy, etc.
3. Interface and installation mode: Customize the connection mode according to the equipment structure, such as flange, threaded or integrated installation.
4. Control mode: analog control, digital signal control or field bus control (such as CAN and PROFIBUS) can be selected.
5. Material and sealing requirements: stainless steel, ceramics and other corrosion-resistant materials are selected for corrosive media; Adopt high temperature resistant sealing ring in high temperature environment.
III. Customization Process and Technical Support
Customization of special servo valves usually includes the following steps:
1. Demand analysis: in-depth communication with customers, clear working conditions and performance indicators.
2. Scheme design: based on customer’s demand, structural design and material selection are carried out, and simulation verification is carried out.
3. Prototype test: make a prototype and conduct performance test under simulated working conditions to optimize the design.
4. Mass production and quality control: ensure product consistency through strict quality management system.
5. After-sales service support: provide on-site debugging, use training and long-term technical support.
Four, the typical application case analysis
In the control system of a large hydraulic press, the user needs to achieve 0.1% control accuracy and response speed within 10ms. The standard servo valve is difficult to meet the requirements. The customized scheme adopts high-precision displacement sensor and digital control module, and improves the control stability through closed-loop feedback, and finally successfully achieves the customer’s expected goal.
V. Conclusion
With the continuous improvement of industrial automation level, higher requirements are put forward for the accuracy and reliability of hydraulic control system. The customization of special servo valve can not only meet the individual requirements, but also significantly improve the efficiency and safety of equipment operation. In the future, with the development of intelligent manufacturing and industrial internet, servo valves will develop in a more integrated and intelligent direction, further promoting the popularization and deepening of customized services for special servo valves.
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