A gear pump is a positive displacement device,which is similar to a piston in a cylinder. When each gear rotates into the fluid space of the next gear, the liquid will be mechanically squeezed out. Debido a que el líquido es incompresible, cuando el líquido y el engranaje están en el mismo espacio, el líquido se drena. The gears are constantly meshing, at the same time,the pump continuously discharges liquid. These bring us to today's question, is the fluid discharged by a gear pump a fixed volume or a variable volume? This requires an analysis of the working principle and characteristics of the gear pump.
First, we need to figure out the working principle of a bomba de engranaje. A gear pump uses two meshing gears to achieve fluid transportation. The two gears’names and functions are different. One gear is called the drive gear, and another is called the driven gear. The drive gear plays a primary role in the syatem, while the driven gear is the secondary component. The drive gear drives the driven gear, and when the drive gear is spinning, the driven gear follows the rotation. Between them, a sealed chamber is formed, which is constantly changing and not static. This change makes the pump perform the functions of sucking in and expelling liquid.
The volume of the pump chamber in a gear pump is fixed, and the space in the sealed chamber remains constant and does not change.Every time the gear rotates, the volume of liquid sucked into and discharged from the pump chamber is also constant. This shows that the volume of liquid delivered by a gear pump per unit of time is fixed, and it has a certain flow rate and pressure.
Variable displacement pumps are pumps that can adjust their output flow and pressure when they are needed. However, the output flow and pressure of bomba de engranajes are determined by the volume of the pump chamber and the speed of the gears. The volume of the pump chamber is fixed, and the speed is also fixed, so it is impossible to change them by adjusting the pump's structure or parameters. In conclusions, gear pumps don’t have the ability to regulate output flow and pressure .In hydraulic systems, gear pumps are often used for liquid transfer or as drive pumps for other hydraulic components.
From a dialectical perspective, a gear pump is a positive displacement pump that achieves liquid conveyance through the meshing of the drive gear and the driven gear. The output flow rate and pressure of a gear pump are fixed and cannot be altered. In hydraulic systems, gear pumps are commonly used for liquid conveyance or as drive pumps for other hydraulic components.
