What is a gerotor oil pump
Introduction: A Gerotor oil pump is a type of positive displacement pump consisting of an external gerotor, an internal gerotor and a housing. As you can see in the illustration below, the outer gerotor has one more tooth than the inner gerotor and has a convex cycloidal profile on its outer surface. The inner gerotor has a concave cycloidal profile on its inner surface and is installed off-center within the outer gerotor. Both gerotors are positioned such that the convex and concave surfaces are in contact with each other. Housings, usually made of cast iron or aluminum, provide the rotors and necessary supports. How various types of gerotor oil pump work we talked about centrifugal pumps and reciprocating pumps but it’s not over yet pumps are such a wide and evolving topic that a person can keep on talking and never stop so in today’s video we’ll be talking about another type of pump called the rotary pump rotary pumps are positive displacement gerotor oil pump that use rotary motion instead of reciprocating motion in their pumping action the rotary pumps can be designed to pump liquid gases and even mixtures of the two unlike reciprocating pumps the rotary pumps. Rotary Pumps: Since the fluid flow is continuous they develop a dynamic seal or rotary pumps have three major operations unlike the two of the reciprocating pumps the first operation is the suction operation here the fluid is sucked into the pump from the pipe or reservoir the next operation is the travel operation here the fluid moves from the suction side gerotor oil pump to the exit side the third operation The exhaust operation here the fluid exits the pump and flows into the exit pipe if you feel all this a bit confusing don’t worry as we progress in the video you’ll be able to get a better understanding ever since the development of better drivers for centrifugal pumps they have been continuously replacing all the type of the pumps Gear Pumps: There is one huge disadvantage for these pumps similar to how kryptonite is dangerous for Superman so as high viscosity fluids for centrifugal pumps this is because it is very difficult to pump these fluids with just the centrifugal action due to this a different type of pump called gear pumps are used high viscosity fluids are the bread and butter of gear pumps gerotor oil pump consist of two gears meshing working principle of rotor oil pump with diagram Each other one gear is driven by an external shaft this is called the drive of gear the other gear acts as an idle gear and rotates with the help of the meshing action from the drive of gear the gear pumps normally have extremely close tolerance between the gear teeth and the wall of the pump case Close Tolerance: The close tolerance is the main reason behind the pumping action as the gears of the pump rotate they get separated at the suction side of the gerotor oil pump this area is generally filled with fluid even if the suction area is not filled the gear pumps are self priming this means they are capable of generating sufficient suction pressure to pull the it towards the gears for pumping this is the end of the suction operation as the gears rotate the fluid is carried by the gears towards The discharge side of the pump the type meshing and almost zero clearance ensures that the fluid doesn’t leak this concludes the travel operation as the gear is now Re-mesh together the total volume will reduce this forces the fluid out of the pump through the discharge pipe this ends the discharge operation Types of Gerotor oil pump There are many variations and types of gear pumps the variations are made to accommodate the different types of fluid that they will be used pump the first type is the External gear pump This is the type of gear we discussed until now the next type of gear pump is called the internal gear pump there are two different variants of internal gerotor oil pumps one is the gear outer and the other is a crescent gear pump the gear rotor is a type of gear pump which has two gears arranged one within another the working of the pump is similar to the external gear pumps the fluid enters the gear water through an inlet port The fluid is then transported to the discharge port by the internal gear once the fluid is at the discharge side the area between the two rotors decreases due to its shape this forces the liquid out through the discharge port the gear water pumps are most commonly used in automobiles to pump lubricant or oil this is because these gerotor oil pump are smaller than external gear pumps and are also able to pump viscous fluids efficiently. External gear pump The next type of external gear pump is the crescent gear pump just like the previous two types of gear pumps the crescent gear also has two gears which meshed together the external gear is larger and has more teeth than the internal gear however it gets the name Crescent due to the crescent or moon shaped wall that is present inside the gerotor oil pump when the teeth of the two gears come out of mesh low-pressure zones are created at the gaps between the teeth fluid is trapped between the teeth of the gears and the walls of the pump as the fluid travels with the gear it reaches a point where the gear starts to mesh again this force is the fluid out of the gerotor oil pump and it exits through the discharge pipe Crescent Gear Pumps Uses The Crescent pumps are able to pump fluid with much higher viscosity than give outer gerotor oil pump these pumps are most commonly used in oil refineries to pump oil into the holding tanks the pumps … Read more