The Changes in the Output Parameters of Planetary Hydraulic Machines with the Increase in the Gap Between Their Rotors

European Green Deal: Improving the Efficiency of Using Planetary Hydraulic Machines

“…The main systems of the planetary HM (Figure 1), which ensure its performance, are the system of rotors [13,14] and the distribution system [15,16]. The system of rotors is represented by an external rotor 10 with inserted teeth (rollers) 1 and an internal rotor 2, forming a hypocycloidal engagement [14]. The distribution system is represented by a movable distributor 3 and a fixed distributor 6.…”

“…An analysis of the reasons for the unsatisfactory operation of PHM (orbital) made it possible to identify two main units that limit their effective operation: the rotor system [13,14] and the distribution system [16,17]. In the system of rotors, the kinematics of the movement of the outer rotor was studied [13,14] and the effect of changing the gap between the inner and outer rotors on the change in the functional parameters of the planetary HM was determined [67].…”

“…An analysis of the reasons for the unsatisfactory operation of PHM (orbital) made it possible to identify two main units that limit their effective operation: the rotor system [13,14] and the distribution system [16,17]. In the system of rotors, the kinematics of the movement of the outer rotor was studied [13,14] and the effect of changing the gap between the inner and outer rotors on the change in the functional parameters of the planetary HM was determined [67]. The dynamic processes occurring in the system of rotors are described [10,12,22]; an experimental assessment of the influence of the design features of the system of rotors on the functional characteristics of planetary HM is carried out [68].…”

“…The distribution system is a complex unit, which is a device for supplying and draining the working fluid into the working chambers [15,16], formed by the outer and inner rotors, in a certain sequence [13,14]. The rational kinematic schemes of the distribution system [16] and the rational geometrical parameters of the distribution windows [71] were substantiated, allowing to reduce the pulsations of the working fluid flow; the influence of the shape of the windows made in the form of a segment [15,17], a circle [15,72] and a groove [15,73] on the throughput of the distribution system justified the angular arrangement of the windows [74].…”

“…However, one must take into account the fact that the planetary (orbital) HM is a structure consisting of a gearbox and a liquid distribution device [14,16]. In this case, the gearbox has a special cycloidal gearing that forms the working chambers, and the distribution device ensures the supply of the working fluid to these chambers.…”