Hydraulic swivel motor for testing machine - with method of dimensioning two side annular spaces and central space

摘要

The hydraulic swivel motor has side annular spaces (2, 3) on eithe side of a central annular space (1). They are each provided with pistons (5, 6) and dividers (8, 9). The piston (4) of the central space is displaced by 180 deg. with respect to the pistons of the side spaces and the axial and radial dimensions of all three spaces are so calculated that the sum of the radial forces of the side spaces corresponds to the radial force of the middle space. USE/ADVANTAGE - Hydraulic swivel motor for a testing machine which is capable of attaining a high load frequency.