Influence of the Shape of Windows on the Throughput of the Planetary Hydraulic Motor’s Distribution System

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

“…The contact zone of the end distribution system of a planetary-type HM is represented by surfaces H 1 and H 2 , and limited by diameters D 1 and D 2 (Figure 3c), for the fixed and movable distributors, respectively. On the annular contact surface H 1 of the fixed distributor, the injection and drain windows are alternately located (Figure 4) [15][16][17]. On the contact surface H 2 of the movable distributor, also made in the form of a ring, there are working and unloading windows (Figure 4) [15][16][17].…”

“…On the annular contact surface H 1 of the fixed distributor, the injection and drain windows are alternately located (Figure 4) [15][16][17]. On the contact surface H 2 of the movable distributor, also made in the form of a ring, there are working and unloading windows (Figure 4) [15][16][17]. Moreover, distribution windows can be made both in the form of a segment [15,17], and in the form of a circle [15,72] and a groove [15,73].…”

“…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].…”

“…To ensure the operation of the hypocycloidal engagement, it is necessary to have a rotating hydraulic field created by the working fluid distribution system [15,16]. The hydraulic field (Figure 2) is formed by contacting the end surfaces of the movable 3 and fixed 6 distributors on the contact surfaces of which distribution windows are made [17].…”

“…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]. The dynamic processes occurring in the distribution systems were investigated [10,12,75] and experimental studies of the throughput of the distribution systems of planetary HM were carried out [76].…”