There are typically three types of hydraulic pump constructions found in mobile hydraulic applications. These include gear, piston and vane; however, there are also clutch pumps, dump pumps and pumps for refuse vehicles such as dry valve pumps and Muncie Power Products’ Live PakTM.
Hydraulic pumps, calculation formulas
A pump produces liquid movement or flow: it does not generate pressure. It produces the flow necessary for the development of pressure which is a function of resistance to fluid flow in the system. For example, the pressure of the fluid at the pump outlet is zero for a pump not connected to a system (load). Further, for a pump delivering into a system, the pressure will rise only to the level necessary to overcome the resistance of the load.
Hydraulics makes a flexible and efficient form of energy transfer. With the introduction of modern machinery the need to power them has driven innovations in hydraulic energy; hydraulic pump technology is often chosen for their efficiency and simple designs.
What is a Hydraulic Pump and Why do You Need It?
Hydraulic pumps are sources of power for many dynamic machines. Hydraulic pumps are capable of pushing large amounts of oil through hydraulic cylinders or hydraulic motors. In this fashion, the pump converts the mechanical energy of the drive (i.e. torque, speed) into hydrostatic energy (i.e. flow, pressure). You can use hydraulic machines – equipped with a pump – to do different types of work such as lift, lower, open, close or rotate components.
What are positive-displacement pumps?
External gear pumps can be equipped with straight spur (the most common type), helical, or herringbone gears. In operation, the drive gear and driven gear rotate, creating a partial vacuum at the pump inlet (where gear teeth unmesh) that draws fluid into gear teeth. Gear teeth mesh at the outlet, forcing fluid out of the pump.
The Four Main Types of Hydraulic Pumps
Machines and combustion engines need the right amount of lubricant in order to operate smoothly. Depending on the machine, there could be thousands of gears that need lubricant, and a gear pump helps keep all of these components running strong. Gear pumps are used as a lubrication systems that injected fluids into gears using pressure to make sure the lubrication reaches all the nooks and crannies. Gear pumps can also be used in hydraulic power steering systems to move fluids.
Thomas Industry Update
At Global Electronic Services, we’re often called upon to service hydraulic pumps. Hydraulic pumps are an important part of a wide variety of manufacturing processes. If you use them in your industry, you need to have them up and running at maximum efficiency as often as possible.
Variable displacement axial piston pump type V30D
Variable displacement axial piston pumps operate according to the bent axis principle. They adjust the geometric output volume from maximum to zero. As a result they vary the flow rate that is provided to the loads.