As an important part of the steam turbine, the control oil system undertakes the key tasks of regulating and protecting the unit. In this system, the oil pump inlet filter AX3E301-03D10V/F plays a vital role. It is not only responsible for filtering impurities in the oil and ensuring the cleanliness of the oil, but also directly related to the cavitation risk prevention and control at the oil pump inlet. Cavitation, as a common fluid machinery failure, will cause irreversible damage to the oil pump and the entire control system once it occurs. Therefore, in-depth discussion of the correlation between the flux design of the filter element and the oil temperature is of great significance for preventing cavitation and ensuring the stable operation of the steam turbine control oil system.

Cavitation formation mechanism

Cavitation is essentially the physical damage caused by the formation of bubbles and subsequent rupture of liquid when the pressure is lower than its saturated vapor pressure. In the control oil system of the steam turbine, the inlet of the oil pump is the area with the most concentrated cavitation risk. When the filter element is blocked or the flux is insufficient, the flow of oil at the inlet of the oil pump is blocked and the pressure is reduced. Once it is lower than the saturated vapor pressure of the oil, bubbles will be generated. These bubbles burst rapidly in the high-pressure area, releasing huge energy, causing serious scouring and corrosion to the blades, bearings and other components of the oil pump, resulting in a decline in equipment performance or even failure.

As a key factor affecting the physical properties of oil, oil temperature has a significant impact on the occurrence of cavitation. The increase in oil temperature will reduce the viscosity of the oil and enhance its fluidity, but it will also increase the saturated vapor pressure of the oil, increasing the risk of cavitation. On the contrary, when the oil temperature is too low, the viscosity of the oil increases and the flow resistance increases, which may also cause the inlet pressure of the oil pump to decrease and induce cavitation. Therefore, the flux design of the filter element AX3E301-03D10V/F must fully consider the change in oil temperature to ensure that sufficient flux can be maintained at different temperatures to prevent cavitation.

Key parameters of filter element flux design

The flux design of the filter element, that is, the oil flow rate allowed to pass through the filter element per unit time, is the key to ensuring its effective filtration and preventing cavitation. The calculation of flux involves multiple parameters, including pressure drop, flow rate, viscosity, etc. However, in practical applications, the precise calculation of these laws is often complicated and affected by many factors. Therefore, when designing, we pay more attention to the performance of the oil pump filter element AX3E301-03D10V/F at different oil temperatures, and how to adapt to the changes in oil temperature through reasonable flux design.

The influence of oil temperature on the flux design of the EH oil filter element AX3E301-03D10V/F is mainly reflected in two aspects: one is the change in oil viscosity caused by oil temperature changes, which in turn affects the pressure drop and flow of the filter element; the other is the effect of oil temperature changes on the saturated vapor pressure of the oil, which is directly related to the risk of cavitation. At high temperatures, the viscosity of the oil decreases, the fluidity increases, the pressure drop of the filter element decreases, but the saturated vapor pressure increases, and a larger flux is required to maintain the pressure at the inlet of the oil pump to prevent cavitation. At low temperatures, the oil viscosity is high and the flow resistance is large, so the flux of the filter element needs to be increased accordingly to compensate for the pressure loss caused by the increase in viscosity.

Optimization strategy

For the challenge of the correlation between the flux design and oil temperature of the pump inlet filter element AX3E301-03D10V/F, we can optimize it from the following aspects:

1. Material selection: Select temperature-sensitive materials, such as thermoplastic elastomers, and automatically adjust the pore structure of the filter element according to the change of oil temperature to maintain a stable flux.

2. Structural design: Design a filter element with a variable pore structure to adapt to the oil flow characteristics at different oil temperatures by adjusting the pore size to ensure that sufficient flux can be maintained at different temperatures.

3. Temperature monitoring and adjustment: Install an oil temperature monitoring device in the control oil system to monitor the changes in oil temperature in real time, and adjust system parameters such as the speed of the oil pump and the replacement cycle of the filter element according to the monitoring results to optimize the performance of the filter element.

4. Intelligent management: Use modern information technology, such as the Internet of Things and big data, to achieve remote monitoring and intelligent management of filter element performance, and timely discover and deal with potential cavitation risks.

The importance of filter element AX3E301-03D10V/F in the turbine control oil system is self-evident. The correlation between its flux design and oil temperature is directly related to the cavitation risk prevention and control of the oil pump. Through reasonable material selection, structural design, temperature monitoring and regulation, and intelligent management, we can effectively improve the performance of the filter element, reduce the risk of cavitation, and ensure the stable operation of the turbine control oil system.

When looking for high-quality, reliable oil filters, 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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