Top 10 Different Types of Hydraulic Pumps Used in Industry

Hydraulic pumps are at the heart of hydraulic systems, converting mechanical energy into hydraulic energy. They are an essential component in various industries such as construction, manufacturing, agriculture, and aerospace. Understanding the types, classifications, and applications of hydraulic pumps is essential to choosing the right pump for a specific industrial need. This article explores 10 different types of hydraulic pumps, their classifications, and the role they play in various hydraulic systems.

Hydraulic pumps are broadly classified into three major categories based on their design and working principles:

Gear Pumps
Vane Pumps
Piston Pumps

Each category has unique characteristics, advantages, and limitations that make it suitable for specific applications. Let's Poocca dive into the classification of hydraulic pumps and explore the types of hydraulic pumps in each category.

Types of Hydraulic Pumps

External gear pumps are one of the most common types of hydraulic pumps. They consist of two meshing gears that rotate to create a vacuum, drawing fluid into the pump and then squeezing it out under pressure. External gear pumps are relatively simple, durable, and cost-effective.

Internal gear pumps work similarly to external gear pumps, but the internal gear rotates inside the external gear. They will run smoothly and handle viscous fluids strongly.

Gear pumps are a special type of internal gear pump. They consist of an inner rotor and an outer rotor that work together to move the fluid. These pumps are compact and efficient, making them the best choice for space-constrained applications.

Our Poocca Hydraulic Manufacturers' hot-selling gear pump product series include SGP, HGP, AZPF, GR series, KP series, etc., a variety of hydraulic gear pumps for sale, please contact us.

Fixed displacement vane pumps use rotors with sliding vanes to move fluid. The vanes expand and contract as the rotor turns, forming chambers that suck in and discharge fluid.

Variable displacement hydraulic vane pumps are hydraulic pumps that can automatically adjust displacement according to load changes. It adjusts the volume of the pump chamber by changing the rotor or vane angle, thereby achieving flow changes. This pump has the advantages of energy saving and high efficiency. It can reduce energy consumption when the load is light and provide sufficient flow support when the load is heavy. It can ensure the stability and efficiency of the hydraulic system under different working conditions.

Parker T6 T7 T67, Yuken PV2R, Vickers V VQ series vane pumps. These are the choices of many of our customers.

Parker T6 T7 T67, Yuken PV2R, Vickers V VQ series vane pumps. These are the choices of many of our customers

Contact now

The axial piston pump is an efficient hydraulic pump that works by the piston moving axially along the pump shaft in the pump body. Its core feature is that it can provide high-pressure output. Axial piston pumps are divided into two types: fixed displacement and variable displacement. The variable displacement pump adjusts the displacement by changing the inclination angle of the piston to cope with changes in load and improve the flexibility and efficiency of the system.

Because the design of the piston pump has lower friction loss, higher efficiency, and can work stably at higher pressure, it is particularly suitable for high-pressure and high-power application scenarios.

The radial piston pump is characterized by the radial arrangement of the piston around the central axis. A hydraulic pump that uses a plunger to move in a radial direction perpendicular to the pump shaft in the pump body to inhale and discharge hydraulic oil. Unlike axial piston pumps, the plungers of radial piston pumps are arranged radially around the pump shaft. Its main features are compact structure and stable output, and it is suitable for high-pressure and large-flow hydraulic systems.

Radial piston pumps usually have high working pressure and flow stability, and are particularly suitable for application scenarios that require large flows and small pressure fluctuations. By adjusting the inclination angle of the plunger, the radial piston pump can achieve a variable displacement function to meet the needs of different loads.

The bent axis piston pump is a variant of the axial piston pump, in which the piston is at a certain angle to the drive shaft. This design can improve efficiency and compactness. It is a special structure of hydraulic pump, whose working principle is similar to that of a traditional piston pump, but the movement trajectory of the piston is changed by a bent drive shaft. The angle adjustment between the drive shaft of the pump and the pump body causes the piston to move in a curved trajectory in the pump body, thereby achieving the suction and pressure delivery of liquid.

Bent axis piston pumps are generally designed with variable displacement. The displacement can be changed by adjusting the eccentric shaft angle of the piston to adapt to different load requirements. Due to its high efficiency and reliability, bent axis piston pumps are widely used in high-demand hydraulic systems.

Piston pumps are generally used on excavators and other equipment, such as Danfoss D1P, D1H, Rexroth A10VSO A4CVSG, Parker PV, etc., which can be used on different brands of excavators. Please let us know your needs, Poocca Hydraulic Manufacturer will contact you as soon as possible and provide detailed product information, dimension drawings, etc.

Piston pumps are generally used on excavators and other equipment

Contact now

The screw pump uses two or more intermeshing screws to move the fluid along the screw axis.

The hydraulic screw pump is a pump commonly used in hydraulic systems. Its working principle is based on the volume change caused by the rotation of the screw. There are one or more screws in the pump, which drive the liquid to flow by rotation. The liquid moves in the threaded groove in the pump body, and the liquid is sucked in and pressed out by the rotation of the screw, thereby providing a continuous and stable flow rate.

A hydraulic peristaltic pump is a hydraulic pump that delivers fluids through peristaltic action. Its working principle is similar to the peristaltic action in organisms. The friction between the peristaltic wheel and the pipe presses the liquid to the output end. The liquid generates pressure in the pipe as the peristaltic wheel rotates, pushing the liquid forward. The design of the peristaltic pump allows the liquid to only contact the inner wall of the pipe, and the pump body and the fluid will not come into direct contact, thus reducing the risk of wear and contamination.

The main advantage of the hydraulic peristaltic pump is that it can accurately control the flow rate, does not generate pulsation during the pumping process, and provides a stable output. It is suitable for occasions with high requirements for flow accuracy and liquid purity, and is common in applications that need to transport viscous or corrosive liquids.

In addition, the peristaltic pump has strong self-priming ability, can run at a lower speed, and has low noise and vibration.

Hydraulic pumps are components of various hydraulic systems, each of which is designed for specific applications. Some common types of hydraulic systems include:

Open-loop hydraulic systems: These systems use a pump to draw fluid from a reservoir, circulate it through the system, and then return it to the reservoir. They are commonly used in mobile equipment and industrial machinery.

Closed-loop hydraulic systems: In these systems, the fluid is constantly circulated without returning to the reservoir. They are often used in applications that require precise control, such as winches and conveyors.

Hydrostatic transmission systems: These systems use a hydraulic pump and motor to transmit power. They are commonly used in agricultural and construction equipment.

Fluid power systems: These systems use the kinetic energy of a fluid to transmit power. They are less common but are used in specialized applications such as torque converters.

The classification of hydraulic pumps and their types make them suitable for a wide range of industrial applications. Here are some examples:
Construction: Hydraulic pumps power excavators, bulldozers, and cranes for heavy lifting and precise movement.
Manufacturing: They are used in injection molding machines, presses, and conveyor systems.
Agriculture: Hydraulic pumps operate tractors, harvesters, and irrigation systems.
Aerospace: They are used in landing gear systems, flight control systems, and hydraulic actuators.
Marine: Hydraulic pumps power power steering systems, winches, and stabilizers on ships and boats.

When selecting a hydraulic pump, you must consider the following factors:
Flow rate: The amount of fluid that the pump can move per unit time.
Pressure rating: The maximum pressure that the pump can withstand.
Efficiency: The ability of the pump to convert mechanical energy into hydraulic energy.
Fluid compatibility: The type of fluid that the pump can handle (such as oil, water, or chemicals).
Operating environment: The conditions under which the pump operates (such as temperature, humidity, and exposure to contaminants).

Whether you are using a hydraulic gear pump, vane pump, or piston pump, choosing the right pump for your application can significantly affect productivity and operational success. By considering factors such as flow rate, pressure rating, and fluid compatibility, you can ensure that your hydraulic system operates smoothly and reliably.

We, Poocca Hydraulic Manufacturers, sell a variety of hydraulic pumps, providing multiple displacement products, and a wide variety of brands such as Rexroth, Parker, Vickers, Shimadzu, Danfoss, etc. Please contact us for consultation.