Abstract:
The centrifugal refrigeration compressor (2) includes a hermetic housing (3); a drive shaft (4) including a first axial end portion (5), a second axial end portion (6) and an intermediate portion (7), the drive shaft (4) further including a central axial bore (8); a first and a second compression stage (9, 11) respectively including a first and a second impeller (16, 17) connected to the first axial end portion (5) of the drive shaft (4); an electrical motor (19) configured for driving in rotation the drive shaft (4) and including a stator and a rotor, the rotor being connected to the second axial end portion of the drive shaft (4); a fixed shaft element secured to the hermetic housing (3) and extending partially into the central axial bore (8) of the drive shaft (4); and a radial bearing arrangement configured for rotatably supporting the drive shaft (4), the radial bearing arrangement being arranged between an outer surface of the fixed shaft element and an inner surface of the drive shaft (4).
Abstract:
The invention relates to a scroll refrigeration compressor including: a stationary fan scroll (6) and a movable fan scroll (9), each of which comprises a plate (9, 11) provided with a coil (8, 12), the coils defining compression chambers (13), the volumes of which are variable; a delivery pipe (21) including a first end, leading into a central compression chamber (13a), and a second end, to be placed in communication with a delivery chamber (22); a delivery valve (28), movable between a position for blocking and a position for clearing at least one delivery opening arranged to place the delivery pipe (21) and the delivery chamber (22) in communication with each other; and at least one bypass valve (34) combined with a bypass passage arranged to place the delivery chamber (22) in communication with an intermediate compression chamber (13b). The compressor comprises a retaining plate (29) which is mounted onto the plate (7) of the stationary fan scroll (6), and on which first and second retaining means are formed, said retaining means being arranged to limit the amplitude of movement of the delivery valve (28) and of each bypass valve, respectively, toward the clearing position thereof.
Abstract:
The invention relates to a compressor including: a stationary volute (6) and a moving volute (9) each comprising a plate (7, 11) provided with a scroll (8, 12), said scrolls defining variable-volume compression chambers (13); a separator (16) sealingly mounted to the plate (7) of the stationary volute (6) and defining therewith a first intermediate volume (19); and a delivery chamber (22) defined by the separator and a sealed enclosure. The compressor also includes: a bypass passage arranged to communicate the first intermediate volume (19) with an intermediate compression chamber (13b); a flow passage arranged to communicate the first intermediate volume (19) with the delivery chamber (22); and a bypass valve (34) mounted to the surface of the separator that is facing the delivery chamber, which valve can move between positions for sealing and opening the flow passage.
Abstract:
Culasse (3) pour compresseur frigorifique à piston, comprenant au moins une première pièce (6) délimitant une chambre d'aspiration de gaz frigorigène (8) et au moins une seconde pièce (12) délimitant une chambre de refoulement de gaz frigorigène (14), les première et seconde pièces étant distinctes l'une de l'autre, les chambres d'aspiration et de refoulement étant chacune destinées à être mises en communication avec une chambre de compression (26) ménagée dans le compresseur. La culasse comprend des moyens d'isolation thermique disposés entre les première et seconde pièces, les moyens d'isolation thermique comportant une chambre d'isolation (22) délimitée par les première et seconde pièces (6, 12).
Abstract:
The invention relates to a distribution device (5) for suction gas, that comprises a distribution pipe (6) as well as bypass pipes (7) for establishing communication between the distribution pipe and the inner volumes (3) of cooling compressors (2). A device for normalising the suction gas flow is provided in the distribution pipe upstream of the bypass pipes (7).
Abstract:
Ce compresseur comprend un arbre d'entraînement (26) comportant un conduit de lubrification (35) désaxé alimenté à partir d'huile contenue dans un carter (31) situé dans la partie inférieure du compresseur par une pompe à huile (34) disposée à une première extrémité de l'arbre, le conduit de lubrification comportant des orifices de lubrification (36) au niveau de différents paliers de guidage de l'arbre, la seconde extrémité de l'arbre étant équipée d'un dispositif de la spirale mobile du compresseur suivant un mouvement orbital. L'arbre comporte un conduit de retour (37) incliné par rapport à l'axe de l'arbre et s'étendant sur au moins une partie de la longueur de l'arbre, une des extrémités du conduit de retour débouchant dans la paroi de l'arbre, dans la zone de celui-ci située au-delà du rotor, du côté du carter d'huile, des moyens de mise en communication fluidique (38, 39) entre les conduits de lubrification et de retour étant prévus.
Abstract:
The counterweight (26) for a scroll compressor is manufactured by an additive manufacturing process and comprises a mounting portion (28) having a first density and a mass portion (29) having a second density, the mass portion (29) being formed radially outward of the mounting portion (28).
Abstract:
The scroll compressor comprises a fixed scroll (8) having an fixed end plate (11) and a fixed spiral wrap (12) extending from the fixed end plate (11); an orbiting scroll (9) having an orbiting base plate (14) and an orbiting spiral wrap (15) extending from a first face of the orbiting base plate (14), the orbiting spiral wrap (15) of the orbiting scroll (9) meshing with the fixed spiral wrap (12) of the fixed scroll (8) to form compression chambers (18), the orbiting base plate (14) comprising a flange portion (16) radially extending on at least part of the circumference of the orbiting base plate (14) and beyond an outer wall surface of the orbiting spiral wrap (15); and a first and a second axial stabilizing arrangement (29, 31) configured to axially stabilize the orbiting scroll (9), the first axial stabilizing arrangement (29) being formed between the flange portion (16) of the orbiting base plate (14) and the fixed scroll (8), and the second axial stabilizing arrangement (31) being formed between a portion of the orbiting spiral wrap (15) of the orbiting scroll (9) and the fixed end plate (11) of the fixed scroll (8).
Abstract:
The scroll compressor (2) comprising a hermetic enclosure (3), a compression unit (11) configured to compress refrigerant, and an electric motor (16) configured to drive the compression unit (11) via a drive shaft (15), the hermetic enclosure (3) comprising a midshell (4), an upper cap (5) and a baseplate (6), the baseplate (6) comprising a mounting base (24) having a plate shape and including a central portion, and a cylindrical rim surrounding the central portion and extending upwardly, the cylindrical rim (28) being secured to the mounting base (24) by a double-welded T-joint (29), the double-welded T-joint (29) including an inner welding seam connecting an inner surface of the cylindrical rim (28) to the mounting base (24), and an outer welding seam connecting an outer surface of the cylindrical rim (28) to the mounting base (24).
Abstract:
The centrifugal turbo-compressor (2) includes a hermetic casing; a drive shaft (6); a first and a second compression stage (12, 13) configured to compress a refrigerant and respectively including a first and a second impeller (18, 19) connected to the drive shaft (6) and being arranged in a back-to-back configuration; an interstage sealing device provided between the first and second impellers (18, 19). The hermetic casing includes a main casing portion (4) in which are arranged the first and second compression stages (12, 13) and the inter-stage sealing device. The first and second compression stage (12, 13) respectively includes a first and a second aerodynamic member (29, 31) each having an annular disc shape and respectively facing front-sides (21, 22) of the first and second impellers (18, 19).