In a rotary gear pump, what are the two spur gears referred to?

In a rotary gear pump, the two spur gears are commonly referred to as the driving gear and the driven gear. The driving gear is the one powered by the motor, which rotates and, consequently, causes the second gear to rotate as well. The driven gear is the one that moves due to the motion imparted by the driving gear. This relationship is key to how the pump generates flow; the engagement between the teeth of the two gears creates a suction effect as the gears rotate, drawing fluid into the pump and pushing it through the discharge port.

This terminology reflects the mechanical function of the gears in the pump system, which is essential for understanding how rotary gear pumps operate and deliver fluid efficiently. The distinction as driving and driven is fundamental in various mechanical applications, where understanding the roles of different components is crucial for system design and troubleshooting.