Rotary piston machine

Abstract

The invention concerns a rotary machine with a spherical piston, comprising a housing (1) whose walls delimit a chamber having a spherical surface (1.1) in its central part. The chamber, delimited by the spherical surface (1.1), contains two rotors (2, 3) with spherical outer surfaces, each mounted rotatably around its own axis (L1, L2), which intersect and form an obtuse angle (α) between them, at the symmetry plane of the housing. The chamber, delimited by the spherical surface (1.1), between the rotors (2, 3), contains a piston composed of two parts (4, 5). The first piston part (4) is connected to the first rotor (2) by means of support arms (16, 17) attached to the first rotor (2) and by means of bearings of the first piston part (12, 13) located at the ends of the support arms (16, 17) and mounted in the first piston part (4), wherein the rotation axis of the bearings coincides with the axis of the rotating surface (L3) of the first piston part (4), and the second piston part (5) is connected to the second rotor (3) by means of support arms (18, 19) attached to the second rotor (3) and by means of bearings of the second piston part (14, 15) located at the ends of the support arms (18, 19) and mounted in the second piston part (5), wherein the rotation axis of the bearings coincides with the axis of the rotating surface (L4) of the second piston part (5). Additionally, the piston parts (4, 5) are connected by a piston part coupling (20), wherein the piston part coupling (20) for the piston parts (4, 5) ensures mutual rotary motion of the piston parts (4) and (5) around an axis being perpendicular to axes (L3) and (L4) of the rotating surfaces (4.1), (5.1) of the piston parts (4, 5) within a small angle. In one embodiment, the first chamber surface (2.2) of the first rotor (2), the second chamber surface (2.3) of the first rotor (2), the first chamber surface (3.2) of the second rotor (3), and the second chamber surface (3.3) of the second rotor (3) are provided with cooling elements (21) that improve heat exchange between the compressed gas and the rotor parts (2) and (3). In one embodiment, the contact surface (4.2) of the first piston part (4) and the contact surface (5.2) of the second piston part (5) are provided, in the area located further from the centre of the spherical surface (1.1) of the housing (1), with cooling elements for the piston parts (22), which improve heat exchange between the compressed gas and the piston parts (2, 3). The chamber, delimited by the spherical surface (1.1) of the housing (1), is divided into separable chambers (V1, V2, V3, V4), of which the first half (V1, V3) is delimited by the first chamber surface (2.2) and second chamber surface (2.3) of the first rotor (2), the spherical surface (1.1) of the housing (1), the rotating surface (4.1) of the first piston part (4), and the surface (5.2) of the second piston part (5). The second half of the chambers (V2, V4) is delimited by the first chamber surface (3.2) and second chamber surface (3.3) of the second rotor (3), the spherical surface (1.1) of the housing (1), the rotating surface (5.1) of the second piston part (5), and the contact surface (4.2) of the first piston part (4), and the rotors (2, 3) are coupled to each other via a gear transmission.