Knowledgement about Hydraulic Pumps

ZYH is a company located in the Institute of Mechanical Engineering of Guangzhou, Guangdong Province. As a leading global supplier of drive and control technology, Rexroth has extensive project experience and product. The main core of it is the hydraulic pumps.

Introducing the types of hydraulic pumps should be come first, in the section the introduction of how those pumps work would be showed together. What exactly does a hydraulic pump do? Every hydraulic system has to have some sort of pump, or all it would do is just sit there. A hydraulic pump creates flow in a hydraulic system. It’s commonly mistaken that the pump creates the pressure in a system, but pressure is really just a byproduct of having flow (usually measured in gallons per minute). The pump simply generates flow, and the size & speed of the pump determines how much fluid it can move. If a pump is moving fluid through an open system with no resistance, there would be no pressure, but pressure is created when a load is introduced. If you are familiar with electrical systems, there are a lot of parallels to hydraulics. Flows would be considered as voltage, while pressure would be thought as equivalent of amperage.

There are several different types of hydraulic pumps, mainly gear pumps, vane pumps, piston pumps and hand pumps. Each type uses a different method to deliver the same effect but are typically used for different applications, as they have different attributes.

Gear pumps are the most common & versatile of all types, typically having the widest range of uses and are economical & efficient. They work by meshing 2 gears together which creates flow by causing lower pressure on one side. I would compare a gear pump to the good old combustion engine. Maybe a little noisy & may have a bit more vibration, but reliable, efficient and easy to maintain. In addition, Vane pumps use a series of “fins” or vanes to create flow. The fluid is swept around a crescent-shaped housing cavity and flow is created by the difference in volume by the variation in the housing. Vane pumps are typically smoother & quieter than gear pumps, so they commonly work well in industrial systems and hydraulic units that will be used indoors. They have no metal-to-metal contact & self-compensate for wear, since the vanes self-extent to fit the housing. They are also very effective in fluid transfer, thanks to excellent suction characteristics. The last type is the Piston Pump. How a Piston Pump Works Piston pumps are typically much more complicated and are often available in wither fixed or, commonly, variable displacement configurations and with pressure compensation. These are big words that mean that piston pumps can usually adapt to the system pressure, providing maximum efficiency and flexibility. They are often used in “closed center” systems where the pump displacement varies to meet the needs of the work being done. Piston pumps use a “swashplate” to move the pistons and the angle of the swashplate & bore of the pistons determines the displacement. Variable displacement systems are beyond the scope of this article but will be covered in an upcoming post. Pressure compensation regulates outputs in response to variations in the system. Piston pumps are typically the most efficient type of hydraulic pumps.

A hydraulic pump creates flow in a hydraulic system. It’s commonly mistaken that the pump creates the pressure in a system, but pressure is really just a byproduct of having flow (usually measured in gallons per minute). The pump simply generates flow, and the size & speed of the pump determines how much fluid it can move. If a pump is moving fluid through an open system with no resistance, there would be no pressure, but pressure is created when a load is introduced. If you are familiar with electrical systems, there are a lot of parallels to hydraulics. Flow (GPM) would be similar to voltage, while pressure (PSI) would be the equivalent of amperage.

Including majority of common kinds of hydraulic pumps, you can find any products you like in their official website and see brief introduction of its advantages and basic information like the following showed. In ZYH’s website, you can also find the history of it and live view of its factories and product lines.

What’s more, if you want to have a good understanding of hydraulic pump, learning about where are they used also is useful and necessary. Hydraulic pumps are used in literally every single hydraulic power transmission system. A hydraulic pump is the device that converts mechanical energy into hydraulic energy, which is a combination of pressure and flow. A hydraulic pump can be any device that you can input force into to create pressure, which in turn creates flow.

Most hydraulic pumps have a mechanical input from an internal combustion engine or electric motor. These prime movers input their mechanical power to the hydraulic pump in a rotational fashion. The input shaft of the pump will be connected to gears, vanes or pistons of the hydraulic pump, where they will rotate or reciprocate to transfer pressure (force) to the hydraulic fluid. As long as the force (pressure) created by the pump is high enough, flow will occur at a rate dictated by the displacement volume of the pump and the speed at which it rotates.

In ZYH, hydraulic pumps are used on every conceivable mobile or industrial hydraulic machine. Hydraulic pumps are used on excavators, dump trucks, mining machinery, and so on. ZYH’s hydraulic pumps are still widely used in industrial environments. Injection molding machines, like presses material handling, lifts, conveyors, etc. The more severe the application, the more likely it will be powered by a hydraulic pump.

After scanning the information introduced above, now you may have a pretty good idea of hydraulic pumps. All the products and details are shown in the official webste, https://www.zyhydraulics.com/products-category/pumps.html. If you want to buy hydraulic pumps, please take products in ZYH into consideration.