Type: The A4VSO series pumps are axial piston variable displacement pumps with a swashplate design. They are primarily used in open-circuit hydraulic systems to provide variable flow and pressure for a wide range of applications, including industrial machinery, mobile equipment, and more.
Performance Specifications
Displacement
The A4VSO series comes in various displacement sizes, typically ranging from 40 cm³/rev to 1000 cm³/rev (e.g., A4VSO40, A4VSO71, A4VSO125, etc.). The displacement can be adjusted continuously within a certain range according to the specific requirements of the hydraulic system.
Pressure
Rated Pressure: These pumps usually have a rated pressure in the range of 350 bar. This is the pressure at which the pump is designed to operate continuously and efficiently under normal working conditions.
Maximum Pressure: They can withstand a maximum pressure of up to 400 bar for short periods or under special circumstances. However, prolonged operation at this maximum pressure might impact the pump's lifespan and performance.
Speed
Maximum Rotational Speed: The maximum rotational speed varies depending on the specific displacement size. For instance, smaller displacement models like A4VSO40 might have a maximum speed of around 2600 rpm, while larger ones such as A4VSO1000 could have a lower maximum speed, perhaps around 1200 rpm. This is to ensure proper mechanical operation and prevent issues like excessive wear and cavitation.
Minimum Rotational Speed: There is also a minimum rotational speed, usually in the range of 500 - 800 rpm. Below this speed, the pump may not be able to generate sufficient pressure or flow to meet the requirements of the hydraulic system.
Flow Rate
The flow rate (Q) of the pump is calculated by multiplying the displacement (V) by the rotational speed (n), i.e., Q = V × n. For example, if an A4VSO71 pump is operating at 1500 rpm, with a displacement of 71 cm³/rev (or 71×10⁻⁶ m³/rev), the flow rate would be Q = (71×10⁻⁶) × (1500/60) = 177.5×10⁻³ m³/min (or 177.5 L/min).
