• COMPACT SATELLITE HYDRAULIC UNIT

    Machines. Technologies. Materials., Vol. 8 (2014), Issue 9, pg(s) 17-20

    The article describes the design and operation of a prototype hydraulic unit. It is based on an inversed kinematics, satellite pump in which the body rotates around the shaft. The pump is placed inside the electric motor. Thanks to that the compact and low mass construction was achieved. Thanks to new commutation unit with enlarged channels, lower pressure losses were obtained. The article presents the construction and results of preliminary tests.

  • SATELLITE PUMP AND MOTOR

    Machines. Technologies. Materials., Vol. 8 (2014), Issue 9, pg(s) 8-11

    The article describe the design and operation of a prototype of satellite pump and a prototype of satellite motor. In both machines, the operating mechanism consists of a non-circular gear with external teeth (rotor), non-circular gear with internal teeth (curvature), and ten gear wheels which cooperate with the rotor and the curvature. The differences between the commutation unit in the pump and the commutation unit in the motor are described. The principle of axial clearances compensation in the pump and in the motor is also presents. The article contains the values of the losses and the efficiency of these machines supplied with rapeseed oil, HFA-E emulsion and pure tap water. The results of durability tests of motor supplied with HFA-E emulsion and rapeseed oil are also presented.