In order to improve an expansion system for a working medium that is used in particular in a circulating process of a system that utilises waste heat, in particular in a system operating in a Rankine cycle, comprising an expansion device coupled to an electricity generator, for the working medium, an inlet for supplying the pressurised working medium, and an outlet for the working medium that has been expanded by the expansion device, it is proposed that an aerosol generator unit that generates a lubricant aerosol should be associated with the inlet, wherein the working medium guided to the expansion device flows through this aerosol generator unit, which has a flow guide for the working medium having a concentration section that concentrates lubricant entrained in the total mass flow of working medium supplied to the expansion device to give aerosol particles, and these aerosol particles leave the concentration section together with a partial mass flow of the working medium, branching off from the total mass flow of working medium, as a lubricant aerosol mass flow, and that a line system should be provided that guides the lubricant aerosol mass flow to lubrication points of an expansion arrangement of the expansion device, for the purpose of aerosol lubrication.

The scroll compressor (2) comprises a hermetic enclosure (3) comprising a midshell (4), an upper cap (5) and a baseplate (6), the baseplate (6) comprising a mounting base (32) having a plate shape and including a central opening (33), and a central cap (28) arranged within the central opening (33), the central cap (28) comprising a concave portion (29) and a first cylindrical rim portion (30) extending upwardly and having an outer diameter substantially corresponding to an inner diameter of the midshell (4); a compression unit (11) configured to compress refrigerant; and an electric motor (21) configured to drive the compression unit (11) via a drive shaft (19). The mounting base (32) comprises a second cylindrical rim portion (34) extending upwardly and surrounding the central opening (33), wherein an inner diameter of the second cylindrical rim portion (34) substantially corresponds to the inner diameter of the midshell (4) and to an outer diameter of the first cylindrical rim portion (30).

The invention relates to a compressor system for generating compressed air. It comprises a drive, a driven compressor, a lubricant cooler, a compressed air cooler and a blower unit. The blower unit has at least two blowers that can be controlled independent of one another, which convey cooling air to first and second cooling chambers that are separated from one another, wherein the first cooling chamber conveys the cooling air to the lubricant cooler, and the second cooling chamber conveys the cooling air to the compressed air cooler. The lubricant cooler and the compressed air cooler have an arrangement that is offset to one another in such a way that the axes of their inflow and outflow flanges, arranged on their lateral walls, are located in different planes. The invention also relates to a method for operating a compressor system that generates compressed air, wherein at least two control signals that are independent of one another are provided for two blowers.

A compressor is provided which is configured to allow lubrication of a thrust surface through an oil groove formed in a thrust surface of a fixed scroll. Also, a scroll compressor is provided which smoothly supplies oil to a thrust surface of a fixed scroll by including a fixed scroll having an oil groove formed in the thrust surface of a fixed scroll sidewall, and allows an injection pressure acting on an orbiting scroll in an upward direction to be added by supplying the oil guided to the oil groove to the thrust surface of the fixed scroll such that an overturn moment generated in the orbiting scroll may be offset.

A compressor system (01) with a system housing (02), in which are arranged heat generating system components (06) comprising at least one compressor stage (201) for compressing a gaseous medium, an air water cooler (12), a blower (15) which generates a cooling air flow (16), and air conducting elements. A cooling air channel (07) is configured which has an inlet opening (08) in the upper section of the system housing (02) and an outlet opening (09) in the lower section of the system housing (02), wherein upper air conducting elements (13) are positioned in order to conduct the cooling air flow (16) after flowing through the air water cooler (12) to the inlet opening (08), and lower air conducting elements (17) are positioned in order to conduct the cooling air flow (16) from the outlet opening (09) to the system components (06).

A scroll compressor, and more particularly, to a scroll compressor including a communication groove which may decrease discharge resistance is provided. The scroll compressor may include a fixed scroll having a fixed end plate and a fixed wrap, and an orbiting scroll configured to perform an orbiting movement about the fixed scroll and having an orbiting end plate and an orbiting wrap. A communication groove in the form of a recessed groove may be formed in an inner surface of the orbiting end plate, and a refrigerant may flow through the communication groove according to a state in which the fixed wrap overlaps the communication groove such that there is an effect in that an opening efficiency of a discharge hole is improved at an initial stage of discharge.

A toroidal combustion engine is provided. The toroidal combustion engine includes a first and a second toroidal cylinder which share a single common intersection to define a combustion chamber. The first toroidal cylinder carries a first piston set, while the second toroidal cylinder carries a second piston set. The first and second piston sets are each rotatable about circular paths which are disposed in planes that are perpendicular to one another.

A transmission assembly for a rotary piston and cylinder device, comprising a rotor including a piston, a stator, a shutter including a slot to receive the piston, and a first gear and a gear sub-assembly, the first gear connectable to a rotatably mounted shutter of the device, and the first gear extending from a side of the shutter, and the first gear connected to the gear sub-assembly which converts rotation to an axis of rotation different to that of the shutter.

A rotary fluid pressure device, such as a low-speed, high-torque gerotor motor, is provided with a valve drive shaft that is partially inserted into and engaged with a main drive shaft as the main drive shaft engages a rotating output shaft and engages a rotating and orbiting star member of a positive displacement device. The device is also provided with a drive retainer configured to retain the engagement of the main drive shaft and the valve drive shaft.

An arrangement of an electric vacuum pump, for example, in a vehicle, wherein a mounting element is provided on which the vacuum pump is installed, and wherein the vacuum pump comprises a pump chamber part and a motor part, and wherein a longitudinal axis extends through the pump chamber part and the motor part. According to the invention, the vacuum pump has a horizontal arrangement with respect to a gravitational direction, wherein the installation of the vacuum pump on the mounting element is limited to two mounting points, and wherein a center of gravity of the vacuum pump lies on a connection axis between the two mounting points.