Abstract: A scroll machine for a medium has a machine housing having a longitudinal axis and an inlet and an outlet for the medium. Provided in the machine housing along the longitudinal axis is: a drive unit having a drive shaft mounted on the machine housing by a first bearing unit and a second bearing unit, a first spiral unit having a spiral channel formed by a first spiral rib and has an inner end region and an outer end region, and a second spiral unit having a spiral channel formed by a second spiral rib and has an inner end region and an outer end region. The first spiral unit and the second spiral unit engage one another to form pressure chambers, wherein the first spiral unit can be moved by means of the drive shaft through the drive unit along an orbital path relative to the second spiral unit.

Abstract: A scroll machine, in particular a scroll compressor, has a first scroll unit with a base and a scroll rib protruding from the base with a scroll rib tip, a second scroll unit with a base and a scroll rib protruding from the base with a scroll rib tip. The first scroll unit can be moved along an orbital path relative to the second scroll unit and the first scroll unit and the second scroll unit engage with each other to form pressure chambers, and the scroll rib of a scroll rib tip having a face seal abuts sealingly to the base of the respective other scroll unit. The base of the first scroll unit and/or the base of the second scroll unit include(s) a pocket with an insert plate arranged in the pocket. Also contemplated is a refrigeration system.

Abstract: Refrigerant compressor installation comprising at least three compressors which are arranged in parallel between an intake conduit and a pressure conduit and which each comprise a lubricant sump unit, wherein the compressors, when in operation, work in such a way that the respective pressures in the respective lubricant sump units of the respective compressors form a pressure cascade according to which the compressors have a successively slightly decreasing pressure in the respective lubricant sump unit in a defined cascade sequence, and wherein the lubricant sump units are connected to each other in a manner corresponding to the cascade sequence by way of a lubricant conduit system for lubricant transport, and wherein each lubricant sump unit comprises a port to which is connected an insert element which on the one hand establishes communication with the lubricant conduit system and on the other hand is configured such that it predetermines, for the respective lubricant sump unit, a lubricant level from whic

Abstract: Muzzle device for a projectile-firing device, comprising:—a body adapted to be fixed at a muzzle of a projectile firing device and comprising an axial passageway for permitting the passage of a projectile leaving said muzzle along an axis in a forwards direction and at least one lateral port having an inner end opening into said passageway and an outer end opening at an outer surface of said body, said lateral port having a proximal wall and a distal wall, said proximal wall being situated closer to said muzzle than said distal wall, wherein said distal wall comprises, considered in a plane containing said axis and a midline of said lateral port:—a first distal wall portion having a concave cross-section;—a second distal wall portion adjacent to said first distal wall portion and having a convex cross-section;—a third distal wall portion adjacent to said second distal wall portion and having a concave cross-section; and—a fourth distal wall portion adjacent to said third distal wall portion and having a conve

Abstract: Muzzle device for a projectile-firing device, comprising: —a body adapted to be fixed at a muzzle of a projectile firing device and comprising an axial passageway for permitting the passage of a projectile leaving said muzzle along an axis in a forwards direction and at least one lateral port having an inner end opening into said passageway and an outer end opening at an outer surface of said body, said lateral port having a proximal wall and a distal wall, said proximal wall being situated closer to said muzzle than said distal wall, wherein said distal wall comprises, considered in a plane containing said axis and a midline of said lateral port: —a first distal wall portion having a concave cross-section; —a second distal wall portion adjacent to said first distal wall portion and having a convex cross-section; —a third distal wall portion adjacent to said second distal wall portion and having a concave cross-section; and—a fourth distal wall portion adjacent to said third distal wall portion and having a c

Abstract: Refrigerant compressor installation comprising at least three compressors which are arranged in parallel between an intake conduit and a pressure conduit and which each comprise a lubricant sump unit, wherein the compressors, when in operation, work in such a way that the respective pressures in the respective lubricant sump units of the respective compressors form a pressure cascade according to which the compressors have a successively slightly decreasing pressure in the respective lubricant sump unit in a defined cascade sequence, and wherein the lubricant sump units are connected to each other in a manner corresponding to the cascade sequence by way of a lubricant conduit system for lubricant transport, and wherein each lubricant sump unit comprises a port to which is connected an insert element which on the one hand establishes communication with the lubricant conduit system and on the other hand is configured such that it predetermines, for the respective lubricant sump unit, a lubricant level from whic

Abstract: In order to improve a compressor for refrigerant, comprising an outer housing, a scroll compressor arranged in the outer housing and having a first compressor member arranged stationarily in the outer housing and a second compressor member which is movable relative to the first compressor member, the compressor members each having a base and first and second scroll ribs, respectively, which rise above the respective base and engage in one another such that the second compressor member is movable relative to the first compressor member on an orbital path about a central axis for the purpose of compressing the refrigerant, a drive unit for the second compressor member having an eccentric drive, a drive shaft, a drive motor arranged in a motor housing and having drawn-in refrigerant flowing around it as well as a bearing unit for the drive shaft which comprises a first bearing member connected to the outer housing, in such a manner that the refrigerant drawn in by the scroll compressor is free from lubricating o

Abstract: In order to improve a compressor for refrigerant, comprising an outer housing, a scroll compressor arranged in the outer housing and having a first compressor member arranged stationarily in the outer housing and a second compressor member which is movable relative to the first compressor member, the compressor members each having a base and first and second scroll ribs, respectively, which rise above the respective base and engage in one another such that the second compressor member is movable relative to the first compressor member on an orbital path about a central axis for the purpose of compressing the refrigerant, a drive unit for the second compressor member having an eccentric drive, a drive shaft, a drive motor arranged in a motor housing and having drawn-in refrigerant flowing around it as well as a bearing unit for the drive shaft which comprises a first bearing member connected to the outer housing, in such a manner that the refrigerant drawn in by the scroll compressor is free from lubricating o

Abstract: To provide a screw compressor comprising a compressor screw housing, two screw rotors with intermeshing screw bodies arranged in the compressor screw housing and with shaft sections arranged on both sides of the screw bodies, the screw rotors being mounted by means of the shaft sections in bearing housings arranged on both sides of the compressor screw housing, which prevents pressure losses, it is proposed that an intermediate portion of the respective shaft section adjoining an end of the respective screw body at the pressure side and extending as far as a bearing section be sealed off in the area of a closure wall of the compressor screw housing at the outlet side from an inside surface of an opening in the closure wall, which surrounds the intermediate portion.

Abstract: To provide a screw compressor comprising a compressor screw housing, two screw rotors with intermeshing screw bodies arranged in the compressor screw housing and with shaft sections arranged on both sides of the screw bodies, the screw rotors being mounted by means of the shaft sections in bearing housings arranged on both sides of the compressor screw housing, which prevents pressure losses, it is proposed that an intermediate portion of the respective shaft section adjoining an end of the respective screw body at the pressure side and extending as far as a bearing section be sealed off in the area of a closure wall of the compressor screw housing at the outlet side from an inside surface of an opening in the closure wall, which surrounds the intermediate portion.