Rotary piston machines working volume sealing systems thereof are disclosed. They can be used in gas (air) and refrigerating compressors, heat and vacuum pumps, and internal-combustion engines. The rotary piston compressor sealing system includes radial and butt sealing bars in the rotor slots, tightened towards the working surfaces by expanders and interacting with the sealing cylinders. The radial and butt sealing bars are made from an antifriction composite material. Each sealing cylinder is configured conjointly with one end of one butt sealing bar. Variations also are disclosed. The technical result involves increasing efficiency of the sealing system and the whole compressor operation, simplification of the system production process, simplification and labor intensity reduction of the system assembly and maintenance, increasing of the working chambers leakage tightness, increasing of system reliability and durability, and improvement of compressor performance related to bleeding and the dynamic pneumatic process as a whole.

There is provided a rotary heat pump capable of realizing further miniaturization, compared with a current status. As means of solution, a rotary heat pump includes: a rotary drive section including: a rotary shaft; a stationary gear; a rotor that has a rotor gear engaged with the stationary gear and that makes an eccentric rotation; a rotary housing along a peritrochoid curve defined by the eccentric rotation of the rotor; and a first side housing and a second side housing that cover one end side and the other end side of the rotary housing and that fix the stationary gear; a heat exchange fin provided in each of a compression region that is demarcated by the rotor and the rotary housing and that has a smallest planar area and an expansion region that has the largest planar area; and a heat insulation portion formed in a boundary portion between the compression region and the expansion region.

There is provided a rotary heat pump capable of realizing further miniaturization, compared with a current status. As means of solution, a rotary heat pump includes: a rotary drive section including: a rotary shaft; a stationary gear; a rotor that has a rotor gear engaged with the stationary gear and that makes an eccentric rotation; a rotary housing along a peritrochoid curve defined by the eccentric rotation of the rotor; and a first side housing and a second side housing that cover one end side and the other end side of the rotary housing and that fix the stationary gear; a heat exchange fin provided in each of a compression region that is demarcated by the rotor and the rotary housing and that has a smallest planar area and an expansion region that has the largest planar area; and a heat insulation portion formed in a boundary portion between the compression region and the expansion region.

Pressure changing devices and methods of making and using the same are disclosed. One pressure changing device includes an elliptic cylinder and a piston that has an external surface with a trochoid cross-section. Another pressure changing device includes a piston and a rotating cylinder that has an internal surface with a trochoid cross-section. Another pressure changing device includes two fixed axes, one for rotation of one component and another for orbiting or oscillation of the other component. The devices and methods include stacked pressure changing devices with one or more common shafts. The pressure changing device may be easier and less expensive to manufacture and repair than prior pressure changing devices of the same or similar functionality, and can provide efficient gap sealing in a high-pressure expansion part of a compression or expansion cycle.

Pressure changing devices and methods of making and using the same are disclosed. One pressure changing device includes an elliptic cylinder and a piston that has an external surface with a trochoid cross-section. Another pressure changing device includes a piston and a rotating cylinder that has an internal surface with a trochoid cross-section. Another pressure changing device includes two fixed axes, one for rotation of one component and another for orbiting or oscillation of the other component. The devices and methods include stacked pressure changing devices with one or more common shafts. The pressure changing device may be easier and less expensive to manufacture and repair than prior pressure changing devices of the same or similar functionality, and can provide efficient gap sealing in a high-pressure expansion part of a compression or expansion cycle.

A compressible fluid separator pump includes a crankshaft, four cylinders, and four pistons. Each cylinder includes an inlet including an inlet valve for mixed fluid comprising a target component and a discharge component, a reject outlet including a reject valve for a reject fluid, and a select outlet for a select fluid, wherein each of the select outlets includes a separator member that prefers the target component over the discharge component such that the target component is at a higher concentration in the select fluid than in the mixed fluid and in the reject fluid. Each piston is connected to the crankshaft and is positioned in one of the four cylinders, and the crankshaft is configured to position two of the pistons at top dead center when the other two of the pistons are at bottom dead center.

A compressor unit (38) for supplying pressurized medium to a tire mounted on a vehicle wheel rim (34), having a compressor (58) for exerting pressure on a fluid medium that is to be conveyed into the tire. The compressor unit (38) is dimensioned to be accommodated in a center bore (44) of the vehicle wheel rim (34) when the vehicle wheel rim (34) is in the mounted state on a wheel hub (62); and the compressor (58) can be driven by a drive unit (56) positioned in the vicinity of the center bore (44) of the vehicle wheel rim (34). The compressor unit (38) is usable with a vehicle wheel rim (34) having a pressurized medium supply device (22) for a tire that is mounted on the vehicle wheel rim (34), as well as a vehicle having a vehicle wheel that includes such a vehicle wheel rim (34).

A compressor unit (38) for supplying pressurized medium to a tire mounted on a vehicle wheel rim (34), having a compressor (58) for exerting pressure on a fluid medium that is to be conveyed into the tire. The compressor unit (38) is dimensioned to be accommodated in a center bore (44) of the vehicle wheel rim (34) when the vehicle wheel rim (34) is in the mounted state on a wheel hub (62); and the compressor (58) can be driven by a drive unit (56) positioned in the vicinity of the center bore (44) of the vehicle wheel rim (34). The compressor unit (38) is usable with a vehicle wheel rim (34) having a pressurized medium supply device (22) for a tire that is mounted on the vehicle wheel rim (34), as well as a vehicle having a vehicle wheel that includes such a vehicle wheel rim (34).

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.

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.