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How do hydraulic pumps work, and what are their advantages and disadvantages?

Because of their ability to produce high pressures and deliver high flow rates, the hydraulic pumps extend their application to a variety of fields. However, to make sure you've chosen the right hydraulic pump, whatever the application, it's a good idea to get an idea of how it works, its strengths and weaknesses. Want to know more? Read on to find out.

What is a hydraulic pump ?

Bien choisir une pompe hydraulique - Guides d'achat DirectIndustry

A hydraulic pump is a mechanical device used to transfer mechanical energy into hydraulic energy. It is designed to pump a liquid, usually water or oil.

Often powered by an electric motor, internal combustion engine or other mechanical energy source, they are essential for transmitting power in hydraulic systems.

Whether you visit a specialist online shop or a retail outlet, you'll find different types of hydraulic pump, including gear pumps, piston pumps and vane pumps. Each of these types of pump operates differently and is used in specific applications.

What are the parts of a pump hydraulics ?

You're probably wondering how a pump produces enough force to move heavy loads Well, the answer lies in the parts that make it up.

To better understand how it works, it is important to know what are the parts of a hydraulic pump. .

From the pumping chamber to the discharge valve, we'll guide you through the key elements of this incredibly useful machine.

- The pumping chamber

The first part of a hydraulic pump is the pumping chamber, also known as the suction chamber. This part is responsible for drawing fluid into the pump through an opening in the chamber. It is usually located at the inlet end of the pump.

Schémas de montage d'une installation de pompage | Negimex

- The rotor

23 Rotor d'une pompe hydraulique volumétrique à palettes. | Download Scientific Diagram

The second key part of this equipment is the rotor, which is responsible for the rotation of the rotoration of the fluid in the pump. It is generally located in the pumping chamber.

This part is made up of several blades that rotate around a central axis. When the rotor rotates, the blades create a force that pushes the fluid through the pump and into the hydraulic system.

- The stator

Réparation de Stator et Rotor, moteur hydraulique POCLAIN MSE02 2 | AliExpress

Generally located at the rear of the pump, behind the rotor, the stator is the element responsible for compressing the hydraulic fluid in the pump. It is made up of several blades that do not move.

When the rotor rotates, the stator blades create a compression that pushes the fluid through the pump and into the hydraulic system.

- The relief valve

Serie 700 Qr Vanne De Déc... | Décharge/stabilisation De... | Irrigation | Produits | Armas Su Armaturleri San. ve Tic. A.S.

Located at the pump outlet, the relief valve is responsible for regulating the pressure of the hydraulic fluid in the device.

It is designed to open and close according to the pressure of the fluid in the system, maintaining a constant pressure and preventing overloads or damage to the system.

- Sealing joints

Joints d'étanchéité, pompe hydraulique TOPRAN 107356 – Topwagen

Seals are important elements that prevent hydraulic fluid from leaking through leaks between the pump's internal components.

What are the most common applications for hydraulic pumps ?

If you would like to find out more about common applications for hydraulic pumps, they are used in a wide range of hydraulic systems, including construction equipment, industrial machinery, vehicles, aircraft and ships.

If you're an extreme sports fan, you might be surprised to learn that pumps are also used in leisure applications. Theme parks, for example, use this equipment to power high-speed rides, while water sports enthusiasts love the jet skis and motorboats powered by these pumps.

How do hydraulic pumps work ?

To operate, hydraulic pumps use a piston or vane to draw hydraulic fluid through the pump inlet and push it through the pump outlet. This fluid is then used to power the cylinders and fluid motors that power machinery and equipment.

These pumps are powered by an electric motor or an internal combustion engine. The movement of the motor is transmitted to the pump by a transmission shaft. The piston or vane in the pump is driven by a cam, which is attached to the drive shaft.

When the hydraulic pump starts working, the piston or vane moves backwards, creating a low-pressure area inside the pump. Fluid is drawn into this low-pressure area through the pump inlet.

As the piston or vane moves forward, it compresses the fluid, creating an area of high pressure inside the pump. The fluid is then forced out of the pump through the outlet, allowing machinery and equipment to operate efficiently.

How should hydraulic pumps be maintained to maximise their lifespan ?

Maintenance préventive des pompes centrifuges - Hydro Group

Now that you understand how they work, you need to know how to maintain hydraulic pumps to maximise their service life and avoid costly repairs.

Get into the habit of regularly checking the oil level in your pump. If the level is too low, it can cause overheating and damage to the pump. So make sure the oil level is correct by using a dipstick and adding oil if necessary.

You can also extend the life of your pump by changing the oil filter regularly. The filter is designed to prevent particles and contaminants from entering the pump. A clogged filter can cause excessive pressure and damage to your machine.

What's more, have your equipment regularly inspected by a qualified professional. This will enable any damage to be detected at an early stage and quickly resolved before it affects the operation of your pump.

How do you find the best hydraulic pump for your budget ?

Looking for a hydraulic pump for your business? It can be a tough choice.

With so many options on the market, it's essential to pay close attention to find the best hydraulic pump for your budget

To do this, determine your needs in terms of flow rate and pressure. These two factors are essential for choosing the right pump. Assess your company's needs and compare them with the specifications of the pump you are considering.

Then compare the prices of different makes and models to find the best deal for your budget. Don't forget to factor in maintenance and repair costs.

Also, be sure to consider the quality of the pump you are considering. If you opt for a cheaper pump of inferior quality, you run the risk of having to replace the pump more often, which could end up costing you more in the long run.

Finally, don't hesitate to ask for advice from the hydraulic equipment sales outlet of your choice. A shop like Au Comptoir Hydraulique has a qualified customer service team available both online and in person to help you choose the right pump for your business. They can also advise you on how to maintain and repair your pump to extend its life and optimise its performance.

What are the advantages of hydraulic pumps ?

Bien choisir une pompe hydraulique - Guides d'achat DirectIndustry

Hydraulic pumps offer a number of advantages over other types of pump.

One of the main advantages is their ability to generate very high levels of pressure, making them ideal for applications requiring high levels of power and pressure, such as construction equipment, industrial machinery and vehicle braking systems.

The hydraulic pumps are also highly reliable and durable, with internal components designed to withstand high pressures and stresses. This makes them ideal for applications requiring prolonged use

What's more, the hydraulic pumps can be used to supply several hydraulic circuits at the same time, offering great versatility and efficient use of energy.

Finally, hydraulic pumps are also very efficient in terms of energy use, as they do not need to convert mechanical energy into electrical energy, as is the case with electric pumps. This can reduce energy consumption and running costs, particularly for applications that require prolonged use.

What are the disadvantages of hydraulic pumps ?

Despite their many qualities, these pumps do have a few drawbacks.

One of the main disadvantages is their high cost, as hydraulic pumps are often more expensive than other types of pump. They can also be expensive to maintain due to the complexity of their design and construction.

Another disadvantage is the noise they produce, which can be very high and annoying in certain applications. Noise can be caused by vibrations in the pump's internal components or by disturbances in the hydraulic fluids.

Hydraulic pumps are also less efficient at lower speeds, which means they may not be suitable for all applications. In addition, their use can also be limited by the temperature of the hydraulic fluid, which can cause damage or failure of pump components.

Finally, hydraulic pumps can also cause environmental problems if hydraulic fluid leaks. Leaks can lead to loss of energy and hydraulic fluid, as well as damage to the environment.

Still on the same theme

- The different types of hydraulic pumps

- What is the difference between a hydraulic pump and a hydraulic motor ?

- Common failures of hydraulic pumps

- How do you choose the right hydraulic pump for your specific application ?

- What are the characteristics of a hydraulic pump ?

- The main characteristics of hydraulic pumps and the differences between their products

- How are hydraulic pumps used in vehicle lifting and moving systems ?

- Safety regulations governing the use of hydraulic pumps and how to comply with them

- The environmental benefits of hydraulic pumps compared with other methods of power transmission

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