Category Archives for Hydraulic Motor
Hydraulic Motors
Hydraulic motors can be used to convert the controlled fluid power from a valve or pump into rota.ting mechanical power for driving a load. The Buid Bow is changed to rotational velocity or speed, and the pressure is converted into … Continue reading
Torque Motor
As shown in Fig. 11.8, a torque motor consists of an armature, two coils, and two pole pieces. The coils are wrapped on the armature, and the armature is mounted such that the ends are positioned in the center of … Continue reading
Design Considerations for Bent Axis Motors
The piston shaft (tapered section shown in Fig. 5.15) does not provide the linkage that ensures that the cylinder block rotates with the output shaft. This linkage is provided with another mechanism. Different manufacturers use various mechanisms to develop this … Continue reading
Vane Motor (Low-Speed, High-Torque) Performance Characteristics
The Vickers Model MHT50 vane motor with 38 in3/rev maximum displacement was chosen for an example. This motor is rated for a maximum pressure of 4000 psi. Maximum continuous speed at 3000 psi is 200 rpm and maximum speed at … Continue reading
Geroler Motor (Disc Valve) Performance Characteristics
The Char-Lynn 10,000 series motor with 40.6 in3/rev displacement was chosen for an example. (Notice that this displacement is approximately 10 times the displacement of the high-speed motors previously studied.) This motor has a maximum speed of 254 rpm for … Continue reading
Hydraulic Piston Motor Efficiency
The fixed displacement axial piston motor (Sauer-Danfoss Model 90-075 MF), comparable to the variable displacement axial piston pump (Sauer-Danfoss Model 90-075 PV), was chosen. This motor has a maximum speed of 3950 rpm and a rated pressure of 6000 psi. … Continue reading
Hydraulic Vane Motor Efficiency
A Vickers Model 25M (65) vane motor was chosen for the comparison. This motor is rated for 3000 rpm at 2500 psi maximum pressure. It has a displacement of 4.19 in3/rev. Efficiencies were calculated for a 35 GPM input flow. … Continue reading
Hydraulic Gear Motor Efficiency
The gear pump design can also be used as a motor. The Hydreco Model 1919 motor has a theoretical displacement of 4.53 in3/rev, a maximum pressure rating of 2500 psi, and 3000 rpm maximum speed rating. Efficiencies were calculated for … Continue reading
Typical Performance Data for a Hydraulic Gear Motor
Manufacturer’s data for a gear motor are given in Fig. 5.2. These data serve as an example of typical data supplied by a manufacturer. The sloping horizontal curves are pressure drop (?P across motor), and the sloping vertical curves are … Continue reading