What Are the Different Styles and Differences of Hydraulic Gear Pumps?

The external gear pump supplier is one of the common types of hydraulic gear pumps used in a wide variety of industrial applications. This style of hydraulic gear pump consists of two gears that mesh together within a housing. As the gears rotate, they create cavities that draw in fluid and force it through the system. The external gear pump is known for its simplicity and reliability, which makes it a popular choice in many industries.

One of the key benefits of the external gear pump is its ability to handle a wide range of viscosities. Whether the hydraulic fluid is thin or thick, the external gear pump can effectively move it through the system without significant performance loss. Additionally, this type of pump can operate at higher speeds and pressures, making it suitable for demanding industrial applications.

External gear pumps are also relatively cost-effective compared to other types of hydraulic pumps, making them an attractive option for applications where cost is a primary concern. The simple design and fewer moving parts also mean that maintenance and repairs are easier and less expensive.

However, external gear pumps do have some limitations. The meshing gears in the pump can create more internal friction, which may result in higher heat generation during operation. Additionally, the external gear pump may not be as efficient as other types of pumps, particularly when it comes to handling large volumes of fluid at very high pressures.

The internal gear pump is another popular style of hydraulic gear pump. Unlike the external gear pump, which uses two external gears to move the fluid, the internal gear pump has one gear inside another. The outer gear is typically driven by a motor, while the inner gear rotates within it. As the gears mesh, fluid is drawn in and pushed through the pump, similar to the external gear pump's function.

Internal gear pumps offer several advantages over external gear pumps. One of the primary benefits is that they are typically quieter during operation, as the meshing of the gears generates less noise. This makes internal gear pumps ideal for applications where noise reduction is a priority, such as in commercial or residential environments.

Another advantage is that internal gear pumps can handle more abrasive fluids and higher pressures than external gear pumps. This makes them suitable for more demanding applications where fluid cleanliness and system pressure are crucial. Additionally, internal gear pumps are more efficient at maintaining consistent flow rates, even under varying operating conditions.

However, internal gear pumps also have some drawbacks. They are generally more complex in design than external gear pumps, which can make maintenance and repairs more challenging and costly. The more intricate design also means that internal gear pumps are typically more expensive to manufacture and purchase than their external counterparts.

Another important distinction between hydraulic gear pumps is whether they are fixed or variable displacement. These two styles refer to the amount of fluid the pump can move per revolution.

Fixed Displacement Gear Pumps: A fixed displacement pump moves a specific volume of fluid per rotation, meaning that the flow rate is constant. This type of pump is straightforward in design and is often used in applications where a constant flow of fluid is required. They are simple, reliable, and cost-effective, but they are less versatile than variable displacement pumps.