Rotary machine for a compression or an expansion of a gaseous working fluid

A rotary machine for a compression or an expansion of a gaseous working fluid, said machine comprising a machine housing, a rotor which is rotatably mounted within said housing and which has a peripheral outer surface provided with a single helically extending groove having a depth varying along its length and serving as a flow passage for the working fluid, and a separation wheel which is mounted for rotation around a rotary axis located at a distance from the rotary axis of the rotor and oriented in a direction deviating from the direction of the rotary axis of the rotor, said separation wheel comprising a central hub portion and a number of blades projecting in at least approximately radial directions from said hub portion and evenly distributed in the circumferential direction of said wheel, said blades serving as separation elements, successively insertable into the groove of the rotor and arranged to divide the groove into a number of working chambers which follow one after another in the longitudinal direction of the groove and which, during coordinated simultaneous rotation of the rotor and the separation wheel, are brought to move along the groove in the longitudinal direction thereof while successively changing their volume, wherein the wheel blades have peripheral edge portions having an acute-angled wedge-shaped profile and terminating in thin sealing edges moveable along walls of the groove and located at least approximately flush with main surfaces of the wheel blades located on high-pressure sides of the wheel blades;

• wherein the said profile of said edge portion extends along the entire blade peripheral portion movable along the walls of the groove, and wherein the rotor has a generally frusto-conical shape at least along a substantial portion of its length.

A rotary machine for a compression or an expansion of a gaseous working fluid, said machine comprising a machine housing, a rotor which is rotatably mounted within said housing and which has a peripheral outer surface provided with a single helically extending groove having a depth varying along its length and serving as a flow passage for the working fluid, and a separation wheel which is mounted for rotation around a rotary axis located at a distance from the rotary axis of the rotor and oriented in a direction deviating from the direction of the rotary axis of the rotor, said separation wheel comprising a central hub portion and three wheel blades projecting in at least approximately radial directions from said hub portion and evenly distributed in the circumferential direction of said wheel, said blades serving as separation elements, successively insertable into the groove of the rotor and arranged to divide the groove into a number of working chambers which follow one after another in the longitudinal direction of the groove and which, during coordinated simultaneous rotation of the rotor and the separation wheel, are brought to move along the groove in the longitudinal direction thereof while successively changing their volume, wherein the wheel blades have peripheral edge portions having an acute-angled wedge-shaped profile and terminating in thin sealing edges moveable along walls of the groove and located at least approximately flush with main surfaces of the wheel blades located on high-pressure sides of the wheel blades;

• wherein the said profile of said edge portion extends along the entire blade peripheral portion movable along the walls of the groove, and wherein the rotor has a generally frusto-conical shape at least along a substantial portion of its length.

A rotary machine for a compression or an expansion of a gaseous working fluid, said machine comprising a machine housing, a rotor which is rotatably mounted within said housing and which has a peripheral outer surface provided with at least one helically extending groove having a depth varying along its length and serving as a flow passage for the working fluid, and a separation wheel which is mounted for rotation around a rotary axis located at a distance from the rotary axis of the rotor and oriented in a direction deviating from the direction of the rotary axis of the rotor, said separation wheel comprising a central hub portion and three wheel blades having a part-circular shape and projecting in at least approximately radial directions from said hub portion and evenly distributed in the circumferential direction of said wheel, said blades serving as separation elements, successively insertable into the groove of the rotor and arranged to divide the groove into a number of working chambers which follow one after another in the longitudinal direction of the groove and which, during coordinated simultaneous rotation of the rotor and the separation wheel, are brought to move along the groove in the longitudinal direction thereof while successively changing their volume, wherein the wheel blades have peripheral edge portions having an acute-angled wedge-shaped profile and terminating in thin sealing edges moveable along walls of the groove and located at least approximately flush with main surfaces of the wheel blades located on high-pressure sides of the wheel blades;

• wherein the said profile of said edge portion extends along the entire blade peripheral portion movable along the walls of the groove, and wherein the rotor has a generally frusto-conical shape at least along a substantial portion of its length.