Introduction
An eccentric gear pump is a type of positive displacement pump that utilizes the movements of two gears - one with a circular shape and another with a non-circular form - to transfer fluids. The eccentric gear pump’s operation creates a reversible flow with a pulse-free delivery rate. This article provides an overview of eccentric gear pumps and their applications.
The Working Principle of Eccentric Gear Pumps
The eccentric gear pump comprises two gears, called the driver and the driven gears, which intermesh. The driver gear is circular while the driven gear has a crescent-shaped profile. When the gears interlock, the crescent-shaped space between them traps the fluid, which is transferred from the inlet to the outlet side of the pump. Therefore, the pump’s action results from the movements of the driver and driven gears, which rotate at different speeds.
Eccentric Gear Pump Applications
Eccentric gear pumps are suitable for applications that require a high flow rate fluid transfer with low shear. Some applications that utilize eccentric gear pumps include:
- Chemical processing: Eccentric gear pumps are widely used in the chemical industries as they can handle highly viscous fluids such as paints, resins, adhesives, and polymers.
- Food and beverage: Eccentric gear pumps are applied to transfer fluids like syrups, sauces, and confectionery products in the food and beverage industry.
- Pharmaceuticals: Eccentric gear pumps are applied in pharmaceutical manufacturing processes that require precise and accurate dosing of fluids.
- Agricultural: Eccentric gear pumps can be used to apply fertilizers and pest control products in the agricultural sector.
Advantages of Eccentric Gear Pumps
Eccentric gear pumps have a range of benefits that make them ideal for various applications. Some of the advantages include:
- Simple design makes them reliable and easy to maintain
- Can handle high volume and high viscosity fluids
- Provides a pulse-free flow with low shear
- Operates quietly, making it ideal for use in noise-sensitive environments.
Eccentric Gear Pump Components
Eccentric gear pumps are composed of several components, including:
- Driver gear
- Driven gear
- Pump casing
- Bearing supports
- Shafts
- Lubrication system
- Gasket and seals
The Difference Between Eccentric Gear Pump and Centrifugal Pump
Eccentric gear pumps have different features and operation principles compared to centrifugal pumps. While a centrifugal pump uses centrifugal force to move liquids, eccentric gear pumps utilize the actions of two gears to transfer fluids. Also, centrifugal pumps have impellers, while eccentric gear pumps have gears.
Maintenance and Service of Eccentric Gear Pumps
Proper maintenance and servicing of eccentric gear pumps is crucial for their optimal performance and extended service life. Some maintenance and service tips include:
- Regular cleaning to remove debris that affects the pump’s efficiency and performance
- Checking the alignment of the gears and shafts to avoid any malfunction
- Regularly greasing the bearings and changing the oil to reduce wear and tear
- Timely replacing worn-out gaskets, seals, and o-rings to avoid fluid leaks
Eccentric Gear Pump Manufacturers
Several eccentric gear pump manufacturers provide high-quality pumps for use in various sectors. Some of the manufacturers include:
- PSG Dover
- Viking Pump
- Moyno Inc.
- Graymills Corporation
Conclusion
Eccentric gear pumps have unique features that make them suitable for various fluid transfer applications. They are reliable, pulse-free, and able to handle high-viscosity fluids efficiently. The maintenance and servicing of eccentric gear pumps are essential for optimal performance and prolonged service life. When selecting an eccentric gear pump, it is important to consider the manufacturer, compatibility, and the application requirements.