Pump mounts are gearboxes that are designed to power hydraulic pumps. These gearboxes have one input and provisions for mounting one to four pumps on…
Category: Creation and Control of Fluid Flow
The multiple pump design places two or more pumps in the same housing and drives them with a single input shaft. Sometimes, only one inlet…
The Vickers Model 25V (T) vane pump has a displacement (cam ring fixed for maximum displacement) of 4.81 in3/rev. The specifications are: Maximum speed 1800…
Servo valves are a close relative of the proportional valve and are based on an electrical torque motor which produces a small deflection proportional to…
The Hydreco Model 1919 gerotor pump has a displacement of 4.53 in3/rev. The manufacturer gives performance data up to a maximum speed of 3000 rpm.…
Load sensing was developed to improve the efficiency of a circuit. It requires a variable displacement pump; thus, it is appropriate to discuss it here.…
The principle of operation of the radial piston pump is shown in Fig. 4.16. In this case, the cylinders are positioned radially around the axis…
The axial piston pump has a series of cylinders (typically 7 or 9) mounted parallel to the axis of rotation. (The arrangement is similar to…
A vane pump (Fig. 4.7) has a series of vanes that slide back and forth in slots. There are springs in these slots that push…
Variable displacement pump circuits are called demand flow circuits. A simple example is shown in Fig. 4.6. (The astute reader will quickly observe that this…