The subject matter described herein relates to a spin pump that includes a combination of a compressor and a vacuum pump on respective pistons extending from a common crankshaft in a rotating housing. Related methods, apparatuses, systems, techniques and articles are also described.

A radial rotary piston machine comprising a frame (1), at least one opening (13) for inlet of a medium into the machine and at least one opening (14) for discharge of a medium out of the machine, where the frame (1) comprises end plates (11) between which a rotor (2) is placed, this rotor (2) comprises axial opening (21) for a shaft (5) of the machine and further comprises at least two angularly offset piston chambers (22) transversely to the rotor axis, the shaft (5) of the machine extends through the axial opening (21) in the rotor (2) and is mounted in bearings in the end plates (11) of the frame (1), circular cams (51) are arranged on the shaft (5), the shaft (5) being positioned eccentrically to the rotor (2), each piston (4) is arranged for reciprocal movement in the chamber (22) and mounted rotatively on the circular cam (51), where the chamber (22) ends are closed by heads (3), the head (3) or the rotor (2) comprise at least one passage (32) for inlet and discharge of a medium from the chamber (22), which are opened and closed by valve means, where the head (3) and/or the rotor (2) comprise at least one passage (32) for inlet and discharge of a medium to and from the piston chamber (22) leading on one end in axial direction to the end plate (11) of the frame (1), and which is opened and closed at its axial opening by valve means in the form of separate arcuate slots (61).

The subject matter described herein relates to a spin pump that includes a combination of a compressor and a vacuum pump on respective pistons extending from a common crankshaft in a rotating housing. Related methods, apparatuses, systems, techniques and articles are also described.

A radial piston rotary machine includes a housing, at least one opening for inlet of a medium to the machine and at least one opening for outlet of the medium from the machine, where the housing includes end caps between which a rotor is rotatably mounted. The rotor is composed of at least two plates, where a chamber for a reciprocating piston is provided in the rotor plate. The rotor plates are separated by a partition plate with an opening for a shaft of the machine. The shaft is mounted in rotary bearings in the end caps of the housing and circular cams are arranged on the shaft. The shaft is mounted eccentrically to the rotor, where the eccentricity of the axis of rotation of the shaft from the axis of the rotor is equal to the eccentricity of the axis of the circular cam from the axis of rotation of the shaft. Each piston is placed movably in reciprocation motion in the chamber for the piston in the rotor plate and rotatably on the circular cam on the shaft. The inlet and outlet of the medium to and from the piston chamber are opened and closed by valve means. The chamber for the piston is formed as a hole in the rotor plate, where at least two opposite walls of the hole are parallel for sliding arrangement of the piston. The piston is closed axially in the chamber at one side by the partition plate of the rotor plates and at the other side by an end plate of the rotor. The end plate comprises-includes an opening for the shaft and apertures for the inlet and outlet of the medium to and from the chamber. The apertures lead in the axial direction to the end cap of the housing, and are opened and closed by valve means in the form of separate arcuate slots.

The subject matter described herein relates to a spin pump that includes a combination of a compressor and a vacuum pump on respective pistons extending from a common crankshaft in a rotating housing. Related methods, apparatuses, systems, techniques and articles are also described.