In the precision control network of the steam turbine fire-resistant oil system, the plug-in solenoid valve undertakes the dual missions of hydraulic execution and safety protection. As the core actuator of the system, the seismic performance and high temperature environment tolerance of the SV13-16-0-0-00 solenoid valve coil are directly related to the reliability and safety of the unit operation. Today we will deeply analyze the performance advantages of this key component from multiple dimensions such as technical principles, structural design, material technology and practical application.

1. Typical working conditions and challenges of solenoid valves in fire-resistant oil system

The steam turbine fire-resistant oil system (EH system) uses phosphate ester synthetic oil as the medium, and the working pressure is usually as high as 14~21 MPa, and it is in a high temperature (55~65℃) and high-frequency mechanical vibration environment for a long time. As the “nerve endings” of the hydraulic control circuit, the solenoid valve coil needs to remain stable under the following extreme conditions:

High-frequency mechanical vibration: The high-speed rotation of the turbine rotor (above 3000 rpm) and the steam power shock cause the system pipeline and valve components to bear continuous vibration loads;

High-temperature thermal stress: The superposition effect of oil friction heat and ambient temperature may cause the coil operating temperature to exceed 80°C;

Transient current shock: When the emergency shutdown (ETS) or overspeed protection (OPC) is activated, the coil needs to complete the magnetic switching within the millisecond response time.

2. Design of seismic performance of SV13-16-0-0-00 solenoid valve coil

1. Mechanical structure optimization

The SV13-16-0-0-00 solenoid valve coil adopts a multi-layer nested magnetic circuit design, and the vibration resistance is improved through the following technical means:

Compact packaging technology: The coil winding and the iron core are cured by vacuum impregnation epoxy resin to form an integrated structure to prevent the internal components from being displaced due to vibration;

Damping buffer system: Add silicone shock-absorbing gaskets at the valve body installation interface, and optimize the bolt preload distribution through finite element analysis to reduce vibration transmission efficiency;

Redundant fixed bracket: A three-point bracket made of 304 stainless steel is used to ensure that the displacement of the coil in the XYZ three-axis direction is less than 0.1 mm (in compliance with IEC 60068-2-6 vibration test standards).

2. Electrical reliability guarantee

Anti-vibration wire connection: The lead wire of the SV13-16-0-0-00 solenoid valve coil adopts a twisted copper core wire + armored sheath design, and a snap-on anti-loose terminal is used at the joint to avoid poor contact caused by vibration;

Dynamic impedance monitoring: Built-in temperature-impedance compensation circuit, real-time correction of inductance drift under vibration environment, to ensure the stability of electromagnetic force output (error ≤±2%).

3. Technological breakthrough in high temperature environment tolerance

The SV13-16-0-0-00 coil optimizes the grain orientation of the core silicon steel sheet and matches it with nanocrystalline soft magnetic alloy to control the magnetic permeability attenuation rate under high temperature within 5%. Fluororubber O-rings are used at the joint between the valve body and the coil, and the IP67 protection level is maintained at 120°C.

In the actual operation performance of the power plant, compared with the previous generation of products, the SV13-16-0-0-00 solenoid valve has reduced the coil circuit failure caused by vibration by 92%, and the maintenance cycle is extended.

The SV13-16-0-0-00 solenoid valve coil has successfully broken through the technical bottlenecks of traditional solenoid valves in the fields of earthquake resistance and high temperature resistance through the coordinated design of material innovation, structural optimization and intelligent thermal management. Its outstanding performance in the steam turbine fire-resistant oil system not only provides a high-reliability solution for the power industry, but also lays a key foundation for the construction of future smart power plants.

When looking for high-quality, reliable solenoid valves, YOYIK is undoubtedly a choice worth considering. The company specializes in providing a variety of power equipment including steam turbine accessories, and has won wide acclaim for its high-quality products and services. For more information or inquiries, please contact the customer service below:

E-mail: sales@yoyik.com
Tel: +86-838-2226655
Whatsapp: +86-13618105229

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