What is Gerotor Pump | Construction, Working, Advantage and more
Principle
Gerotor pump work on the principle of internal gear pump by using gear shaped rotor elements meshing internally.
Construction
Gerotor pump is a positive displacement pump. The name gerotor is derived from “generated rotor”. A gerotor unit have an inner and outer rotor. The inner rotor has n teeth, while the outer rotor has n+1 teeth.The axis of the inner rotor is offset from the axis of the outer rotor. These both rotors rotate on their respective axes.
Working
- When inner gerotor rotates with the help of motor, it creates partial vaccum near the suction portwhen mesh with the outer gerotor. The oil enters through the suction port.
- If the number of teeth for the inner and outer gerotor are four and five respectively, then while the inner gerotor makes one revolution, the outer one makes only 4/5 revolution.
- Due to offset movement between inner and outer gerotor, the volume near the delivery port decreases and oil is forced out through delivery port.
- The care should be taken as gerotor are to be manufactured with high precision otherwise internal leakage becomes excessive.
- It can operate at the pressure of 125bar, maximum speed of 2000-3600 rpm with maximum discharge of 200 lit/min.
Applications
- General mechanical and plant engineering
- Shipbuilding and offshore industry
- Paper, printing, and pulp industries
- Heavy industry
Materials used for pump Construction
- Externals (head, casing) – Cast iron
- Internals (rotor, idler) – Steel
- Bushing – Carbon graphite, bronze, and other materials as needed
- Shaft Seal – Lip seals, component mechanical seals
Advantage of gerotor pump
- Constant and even discharge
- Operates well in either direction
- Quiet operation
FAQ
- What is the principle of gerotor pump?
- It work on the principle of internal gear pump by using gear shaped rotor elements meshing internally.
- What is the advantages of gerotor pump?
- Constant and even discharge. Operates well in either direction. It has quiet operation.
- What type of pump is Gerotor pump?
- Gerotor pump is a positive displacement pump.
- What is the pressure of gerotor pump?
- It can operate at the pressure of 125bar, maximum speed of 2000-3600 rpm with maximum discharge of 200 lit/min.
- Are gerotor pumps self priming?
- It’s depend on pump manufacturer. Some gerotor pump like SKF product series 143 are self-priming, positive-displacement pumps with fixed displacement and high efficiency.
- What is the application of gerotor pump?
- It is suitable for General mechanical and plant engineering, heavy industries, etc.
- If you want video of this Pump then click below link
- how Gerotor pump work?
Pingback: What is Screw Pump | Definition, Construction, Working