Internally Eccentric Pumps

Introduction to Internally Eccentric Pumps and Their Advantages

Internally eccentric pumps are a type of positive displacement pump that utilize a rotating internal rotor and a stationary external stator to create a pumping action. The rotor is shaped in such a way that it remains eccentrically positioned within the stator during rotation, causing the volume of fluid within the pump to change and resulting in the displacement and transfer of the fluid.

These pumps are highly efficient and versatile, making them suitable for a wide range of applications in various industries. In this article, we will provide an overview of internally eccentric pumps, their advantages, and their applications.

The Working Principle of Internally Eccentric Gear Pumps

Internally eccentric gear pumps operate on the principle of positive displacement, which means that a fixed amount of fluid is displaced with each rotation of the rotor. The rotor has an eccentric shape, which causes the fluid within the pump to move from the inlet to the outlet as the rotor rotates.

As the rotor turns, the vanes of the rotor sweep along the inside surface of the stator. This creates a series of chambers between the rotor and stator that increase and decrease in volume as the rotor turns. This causes the fluid within the pump to be displaced and transferred to the outlet.

Advantages of Internal Eccentric Gear Pumps

Internally eccentric pumps offer several advantages over other types of pumps, including;

High Efficiency: The positive displacement principle of internally eccentric pumps ensures that a consistent flow rate is maintained, even when pumping fluids with varying viscosities or densities. This makes them highly efficient, reducing energy consumption and operating costs.
High Pressure: Internally eccentric pumps are capable of producing high pressure, making them ideal for applications requiring high flow rates and pressure, such as in the oil and gas industry.
Low Shear: The design of internally eccentric pumps ensures that the fluid is transferred with minimal shear, making them ideal for pumping shear-sensitive fluids, such as emulsions and suspensions.
Self-Priming: Internally eccentric pumps are capable of self-priming, meaning they can start pumping fluid without the need for manual priming, reducing downtime and increasing efficiency.
Low Maintenance: Internally eccentric pumps have a simple design with few moving parts, making them easy to maintain and repair.

Applications of Internally Eccentric Pumps

Internally eccentric pumps are used in a wide range of industries and applications, including;

Chemical Processing: Internally eccentric pumps are used for the transfer of chemicals and solvents in various chemical processing applications.
Food Processing: Internally eccentric pumps are used in the food processing industry for the transfer of viscous food products, such as sauces, pastes, and creams.
Oil and Gas: Internally eccentric pumps are used for the transfer of oil, gas, and other fluids in the oil and gas industry, where high pressures and flow rates are required.
Cosmetics: Internally eccentric pumps are used for the transfer of cosmetic products, such as lotions, creams, and gels, in the cosmetics industry.
Pharmaceuticals: Internally eccentric pumps are used for the transfer of pharmaceutical products, such as vaccines, suspensions, and creams, in the pharmaceutical industry.

Types of Internal Eccentric Gear Pumps

Usage Areas of Internal Eccentric Pumps

Internally excentrical pumps, also known as eccentric screw pumps, are widely used in a variety of industries due to their unique ability to handle viscous fluids, slurries, and even delicate materials. These pumps consist of a helical screw that moves within a stator, generating a progressive cavity. The eccentricity of the screw and stator ensures that the fluid is transported smoothly, without pulsation, making it ideal for applications requiring precision and gentle handling of the fluid.

In the chemical and pharmaceutical industries, these pumps are essential for transferring sensitive substances, including viscous chemicals, slurries, and even high-purity fluids. Their ability to provide a consistent flow rate without shear stress makes them valuable in situations where the integrity of the fluid must be maintained. Furthermore, in food processing, they are employed for the handling of thick liquids such as pastes, syrups, and doughs, where traditional pumps may struggle due to the high viscosity of the materials.

Additionally, in wastewater treatment, internally excentrical pumps play a crucial role in transporting thick sludge, ensuring that the material is moved without clogging the system. The pulp and paper industry also benefits from their use, where these pumps are employed to move slurries and pulps with varying consistencies. The ability of these pumps to handle solids and liquids in suspension makes them versatile and reliable in sectors that require the movement of challenging fluids.

Internal Eccentric Gear Pumps

Internally eccentric pumps offer numerous advantages over other types of pumps, making them a popular choice for a wide range of applications in various industries. Their high efficiency, high pressure, low shear, self-priming capabilities, and low maintenance requirements make them an ideal choice for pumping fluids with varying viscosities and densities. If you are in need of a reliable and efficient pump for your operations, consider Vimpo Pumps' range of internally eccentric pumps.

VD SeriesInternally Eccentric Pumps