As a key component in the automation control system, the reliability of the performance of the solenoid valve directly affects the stable operation of the whole system. Among the many performance indicators, the life of the solenoid valve is a crucial parameter. Therefore, it is of great significance to carry out the life test of solenoid valve to evaluate and ensure its long-term stable operation. This article will comprehensively carry out the working principle of solenoid valve, the significance of life test, test methods and measures to improve life of solenoid valves.
First, the working principle of the solenoid valve.
The solenoid valve is a basic element of automation using electromagnetic control, which generates a magnetic field through the coil to drive the valve core inside the valve to move and realize the opening or closing of the fluid channel. The core components of solenoid valves include solenoid coils, valve spools, valve bodies, etc. When the solenoid coil is energized, a magnetic field is generated, and the valve core is displaced by magnetic force, which then pushes the valve to open or close to complete the control task of the fluid.
Second, the significance of life test.
The life test of solenoid valve is to simulate its use in the actual working environment, and evaluate its reliability and stability through long-term continuous work. This kind of test can help manufacturers to improve the service life of solenoid valves, find possible design and manufacturing defects in time, and provide an important basis for product improvement and optimization. In addition, the life test can also help users select the solenoid valve that is more suitable for their specific application needs and ensure the efficient operation of the system.
3. Test methods.
The life test of solenoid valves usually includes the following methods:
1) Switch life test: This is the most basic life test, by simulating the switching frequency of the solenoid valve in actual use, and continuously carrying out a large number of switching actions, to observe whether the performance of the solenoid valve will change with the increase of the number of uses. This test can help evaluate the mechanical durability of the solenoid valve.
2) Environmental adaptability test: Solenoid valves may encounter various harsh environmental conditions in practical applications, such as high temperature, low temperature, high humidity, vibration, etc. Environmental suitability testing is to place solenoid valves in these extreme environments to see if they are working properly and if their performance is affected.
3) Withstand pressure test: The solenoid valve needs to withstand a certain pressure when working, and the pressure withstand test is mainly to evaluate the performance and sealing performance of the solenoid valve under high pressure. This testing ensures that the solenoid valve will not leak or be damaged when subjected to pressure.
This solenoid valve life testing machine (SH9265), the valve test bench mainly uses the solenoid valve life test for refrigerators and air conditioners, using touch screen + PLC display and control, which can accurately test and record the parameters of the tested solenoid valve.
Technical Parameters:
1. Current range: 50-500mA (power 1-1 6W);
2. Solenoid valve test voltage: DC5-12V, adjustable.
3. Test stations: 10, each station works independently
4. Test cycle: 0-999s can be set, 5. The equipment has the function of saving when the power is off, which can record the stop time, and the test data can be kept intact in the case of sudden power failure.
6. The number of tests: 1-999999 times can be set arbitrarily, and the number of tests will be automatically stopped after the number of tests, and the alarm will be reminded.
7. Test water pressure measurement range: 0001 ~ 0.003+ 10%mpa。
8. The test is constant pressure, and the pressure accuracy is +0001mpa
Fourth, measures to improve life expectancy.
In order to improve the service life of the solenoid valve, you can start from the following aspects:
1) Material selection: The right material is the basis for improving the life of the solenoid valve. Choosing corrosion-resistant and wear-resistant materials can effectively improve the durability of the valve body and spool, thereby extending the service life of the solenoid valve.
2) Precision manufacturing: The precision in the manufacturing process directly affects the performance of the solenoid valve. Improving manufacturing accuracy and ensuring a good fit between the spool and the seat can reduce wear caused by improper fit and improve the reliability of the solenoid valve.
3) Optimized design: According to the use conditions and working environment of the solenoid valve, optimize its structural design, which can effectively reduce the failure rate. For example, for high-frequency switching applications, the design should consider reducing inertia and friction to reduce wear on the spool and seat.
4) Regular maintenance: Reasonable maintenance and overhaul is an important means to extend the service life of the solenoid valve. Regular cleaning, lubrication and inspection of solenoid valves can detect and solve problems in a timely manner, avoiding downtime of the entire system due to minor failures.
Summary: The life test of solenoid valve is not only very important to ensure the quality of the product, but also the basis for continuous product optimization. Through the in-depth study of the life of the solenoid valve, its reliability under various working conditions can be continuously improved, and the development of automation technology can be further promoted.