1. Optimize the installation design
Reasonably determine the installation height: According to the performance parameters of the Water Injection Pump and the liquid level of the suction pool, accurately calculate and reasonably determine the installation height of the pump to ensure that there is enough static pressure head at the pump inlet. Generally, the installation height is required to be lower than the allowable suction height.
Optimize the suction pipe layout: Try to shorten the length of the suction pipe, reduce the number of elbows and valves, and select a suitable pipe diameter to keep the flow rate of the liquid in the pipe within a reasonable range, generally 1.5 - 2.5m/s, to reduce the pipe resistance. At the same time, ensure the sealing of the suction pipe to prevent air leakage.
2. Control the operating parameters
Stabilize the flow rate and speed: According to the rated flow rate and speed of the Water Injection Pump, by adjusting the outlet valve or using a variable frequency speed control device, the pump can be operated under stable working conditions to avoid large fluctuations in flow rate and speed, especially to prevent operation at large flow rate and high speed.
Control the liquid temperature: Monitor and control the temperature of the transported liquid to avoid excessive liquid temperature. Cooling measures can be taken, such as setting up cooling water pipelines or adding heat dissipation devices, to keep the liquid temperature within a suitable range, generally not exceeding 40°C.
3. Regular maintenance
Inspect and clean parts: Regularly inspect the Water Injection Pump, clean impurities, dirt and rust in the impeller, pump casing and suction pipe, prevent blockage and scaling, ensure smooth flow channels, and reduce flow resistance.
Repair or replace worn parts in time: Regularly check the wear of vulnerable parts such as impellers and shaft seals. For severely worn parts, repair or replace them in time to ensure the performance and sealing performance of the pump and prevent cavitation from being aggravated due to component wear.
4. Improve liquid properties
Reduce liquid viscosity: If the liquid viscosity is too high, appropriate measures can be taken to reduce the viscosity, such as heating the liquid or adding a viscosity reducer. However, it should be noted that when taking heating measures, it is necessary to prevent other problems caused by excessively high liquid temperature.
Remove gas from liquid: Install a degassing device, such as a vacuum degasser or gas separator, before the inlet of the Water Injection Pump to remove gas from the liquid in advance, reduce the impact of gas on pump performance, and reduce the possibility of cavitation.
5. Use anti-cavitation design and materials
Optimize impeller design: Use reasonable impeller design, such as increasing the impeller inlet diameter, optimizing the blade shape and angle, etc., to improve the flow state of the liquid at the impeller inlet, reduce the flow rate, and improve the impeller's anti-cavitation performance.
Select anti-cavitation materials: For parts that are prone to cavitation, such as impellers and pump casings, select materials with good anti-cavitation performance, such as stainless steel, bronze, etc., to improve the cavitation resistance of the parts and extend their service life.
