5. Efficiency
The efficiency of hydraulic pumps is generally affected by the following factors: size, geometric clearance, and the precision of the fit of the parts inside the hydraulic pump; Viscosity and properties of oil; Work pressure and rotational speed. In order to achieve higher volumetric efficiency, when choosing a hydraulic pump, it is important to understand the allowable limits of the internal components of the hydraulic pump
Generally speaking, axial piston pumps have the highest overall efficiency, followed by vane pumps, and finally gear pumps. Pumps with the same structure and larger displacement have higher overall efficiency; Pumps with the same displacement have the highest overall efficiency under rated operating conditions.
6. Application scenarios
Vane pumps are generally only used in non regulated hydraulic systems, such as hydraulic systems in machine tools, hydraulic presses, vehicles, construction machinery, and plastic injection machines. Gear pumps are commonly used in machine tools, construction machinery, mining machinery, and agricultural machinery.
Piston pumps, especially axial piston pumps, are widely used in high-power hydraulic systems that require high pressure, large flow rate, and regulation, such as forging machinery, transportation machinery, mining machinery, metallurgical machinery, ships, airplanes, etc.
7. Economic costs
The cost of a hydraulic pump depends on many factors, the most important of which is the varying complexity of the structure depending on the pump.
Generally speaking, gear pumps cost the least, internal gear pumps are more expensive than vane pumps, screw pumps are more expensive than internal gear pumps and vane pumps, and plunger pumps are more expensive than other pumps.
When choosing a hydraulic pump, in addition to considering the above factors, hydraulic system designers and maintenance personnel should also take into account other basic factors such as safety pressure, maximum working pressure of the system, and compatibility of the entire system. At the same time, the manufacturer's reputation, maintenance, and supply of accessories are also issues that need to be considered when selecting hydraulic pumps.
