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A gear pump uses the meshing of gears to pump fluid by displacement.[1] They are one of the most common types of pumps for hydraulic fluid power applications. The gear pump was invented around 1600 by Johannes Kepler.[2]
Gear pumps are also widely used in chemical installations to pump high-viscosity fluids. There are two main variations: external gear pumps which use two external spur gears, and internal gear pumps which use an external and an internal spur gear (internal spur gear teeth face inwards, see below). Gear pumps provide positive displacement (or fixed displacement), meaning they pump a constant amount of fluid for each revolution. Some gear pumps are designed to function as either a motor or a pump.
- ^ "Welcome to the Hydraulic Institute". Pumps.org. Archived from the original on 2013-06-26. Retrieved 2013-08-18.
- ^ Frank Prager, Kepler as inventor, Vistas in Astronomy, Volume 18, 1975, Pages 887-889, https://doi.org/10.1016/0083-6656(75)90184-1.
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