Why can't the gear oil pump pump pump water

Gear oil pump is designed specifically for conveying high viscosity and well lubricated liquids. Its main application objects include various oils, fats, and other fluids with lubricating properties.

In contrast, the viscosity of water is much lower than these liquids and lacks sufficient lubricity. Therefore, using a gear oil pump to pump water often leads to the following problems:

1. Increased wear: Due to the poor lubricity of water, direct contact between gears and high-speed operation will generate more friction and heat, accelerating the wear of components such as gears, shafts, and bearings.

2. * * Idle Risk * *: The thin water cannot form an effective oil film on the surface of the gear, which can easily cause dry wear, especially in the early stages of start-up, and may lead to damage to the components inside the pump chamber.

3. * * Inefficient * *: The design of gear pumps relies on the viscosity characteristics of liquids to enclose spaces. The low viscosity of water significantly reduces the volumetric efficiency of the pump, resulting in increased leakage and reduced actual flow rate.

4. * * Cavitation hazard * *: Water is prone to vaporization, especially in low-pressure areas, and the shock wave generated by the rupture of bubbles can cause damage to the internal components of the pump.

5. Rust and Corrosion: Ordinary steel gear pumps may experience rust when exposed to water for a long time, especially when standing still, which poses a potential threat to the pump body and internal metal components.

Of course, if it is necessary to use water or other low viscosity, non lubricating liquids as the working medium, a specially designed "water use" gear pump can be used. Such pumps usually make targeted improvements in materials, structure, sealing methods, and other aspects,

For example, using corrosion-resistant materials, increasing gaps, and strengthening seals to adapt to different working conditions.

Therefore, gear oil pumps are not suitable for direct use in pumping unless specially modified or specialized gear pumps for water are selected. In practical operation, the type of pump should be selected reasonably based on the fluid properties and application scenarios,

To achieve optimal performance and avoid unnecessary losses.