Gears are the mechanical components. Gears can change their direction from rotator motion to linear motion. There are many gears in the industry field and external gears is one of them. External Gears is the simplest gears system.
External gears are frictionless and most popular category in gears among all types of different gears. It is cylindrical in shape with parallel teeth to the axis. External gears have external teeth with a wheel formed on the outer surface of the cylinder or cone.
External gears are useful in various industries like coal industry, mining, paper industries and many more. An external gears pump is one in which two gears rotates in opposite direction to create a flow of liquid. Gear teeth formed space from the pump under pressure through which liquid flows. The main characteristic of external pump is speed, flow rates, and viscosity.
Speed and viscosity is proportional to each other that are speed reduced when viscosity increases. This allows the liquid to fill the vacant between the gear teeth. External gears works on the displacement principle as the gears rotates it creates a low and high pressure. Liquid flows into this area of lower pressure. As the gear continues to rotate, the liquid becomes trapped in the pocket formed by the gear teeth and the wall of the pump chamber. In this way the external gears works. |
