Abstract:
Method of assembling a compressor comprising a sealed chamber delimited laterally by a shell (3), a drive shaft (8) housed in the shell and guided relative to the other parts of the compressor via at least one bearing (9) provided in a bearing support (10) fixed to the internal wall of the shell. The method comprises steps consisting in supplying a shell (3) having, in the fixing plane of the bearing support, an oval section comprising a small axis to which the bearing support (10) is intended to be mounted, exerting a pressure on the shell (3) in order to elastically deform it so as to increase the length of its small axis, inserting and positioning the bearing support (10) in the fixing plane of the latter, and ceasing to exert a pressure on the shell so that the latter tends to elastically return to its original form and grip the bearing support.
Abstract:
The invention relates to a refrigeration compressor having a sealed housing defining a suction volume and a compression volume respectively provided on either side of a body (5) contained in the housing, and an oil injection circuit adapted for injecting oil into the compression volume. The oil injection circuit includes a stopper (26) mobile under the action of a centrifugal force between a first position for injecting oil into the compression volume and a second position preventing or limiting the injection of oil into the compression volume, wherein the stopper (26) is adapted so as to move into the second position when the speed of the compressor exceeds a predetermined value.
Abstract:
L'élément de positionnement et de maintien (27) comprend : - une ceinture (28) cylindrique de révolution et d'épaisseur sensiblement constante, présentant un diamètre intérieur sensiblement égal au diamètre extérieur du stator pour pouvoir être montée sensiblement coaxialement avec serrage autour du stator ; - une pluralité d'organes d'appui (30) faisant saillie de la ceinture radialement vers l'extérieur et présentant chacun une face d'appui (34) sur la virole du compresseur, lesdites faces d'appui étant situées sur la face latérale d'un cylindre de révolution fictif de même axe (29) que la ceinture et de diamètre sensiblement égal au diamètre intérieur de la virole, de sorte que l'élément de positionnement et de maintien puisse être monté avec serrage à l'intérieur de la virole.
Abstract:
The double-stage impeller arrangement (17) includes a first impeller (18) and a second impeller (19), each of the first and second impellers (18, 19) having a front-side (21, 22) and a back-side (25, 26), the first and second impellers (18, 19) being configured to be connected to a drive shaft (4) of the double-stage centrifugal turbo-compressor (2) and being arranged in a back-to-back configuration; a radial annular groove formed between the back-sides (25, 26) of the first and second impellers (18, 19); and an inter-stage sealing device provided between the first and second impellers (18, 19). The second impeller (19) is distinct and separated from the first impeller (18) so as to enable an adjustment of an axial distance between the back-sides (25, 26) of the first and second impellers (18, 19), and the inter-stage sealing device includes a one-piece sealing member (32) having an annular disc shape and being at least partially arranged within the radial annular groove.
Abstract:
The scroll compression device includes a first scroll element (11) having a first base plate (13) and a first spiral wrap (14); a second scroll element (12) having a second base plate (15) and a second spiral wrap (16), one of the first and second scroll elements (11, 12) being configured to perform an orbiting movement in relation to the other one of the first and second scroll elements, the first and second scroll elements (11, 12) intermeshing with each other and delimiting compression chambers (17); and a sealing device (28) arranged in an end face (19) of the first spiral wrap (14) and having a sealing surface configured to cooperate with the second base plate (15). The sealing device (28) is configured to allow fluid flow from an upstream compression chamber to a downstream compression chamber through the sealing surface when the pressure in the upstream compression chamber exceeds the pressure in the downstream compression chamber, and the sealing device (28) is configured to prevent fluid flow from a downstream compression chamber to an upstream compression chamber through the sealing surface when the pressure in the downstream compression chamber exceeds the pressure in the upstream compression chamber.
Abstract:
This scroll compressor includes a scroll compression unit including a first fixed scroll including a first fixed base plate and a first fixed spiral wrap, an orbiting scroll arrangement (7) including a first orbiting spiral wrap (14), the first fixed spiral wrap and the first orbiting spiral wrap (14) forming a plurality of first compression chambers. The scroll compressor further includes a refrigerant suction part suitable for supplying the scroll compression unit with refrigerant to be compressed. The orbiting scroll arrangement (7) further includes a first orbiting guiding portion (21) extending from an outer end portion of the first orbiting spiral wrap (14) and configured to guide, in use, at least a part of the refrigerant supplied to the scroll compression unit towards the first compression chambers.
Abstract:
This scroll compressor includes a closed container, a scroll compression unit (3) including a first fixed scroll (4) having a first fixed base plate (8) and a first fixed spiral wrap partially delimiting a first refrigerant inlet passage (P1), and an orbiting scroll arrangement (7) including a first orbiting spiral wrap (14), the first fixed spiral wrap and the first orbiting spiral wrap (14) forming a plurality of first compression chambers. The scroll compressor further includes a drive shaft adapted for driving the orbiting scroll arrangement (7) in an orbital movement, and a refrigerant suction duct (19) suitable for supplying the scroll compression unit (3) with refrigerant to be compressed. The refrigerant suction duct (19) includes a refrigerant supplying portion (19c) oriented towards the first refrigerant inlet passage (P1) and configured to conduct, in use, at least a part of the refrigerant suctioned in the refrigerant suction duct (19) towards the first refrigerant inlet passage (P1 ).
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), such as to authorise a relative movement between the separator and the stationary volute; and a delivery chamber (21) defined by the separator and the sealed casing. The compressor also includes: a bypass passage (32) arranged to connect the delivery chamber (21) to an intermediate compression chamber (13b); a non-return device (34) comprising a sealing member that can move between positions for sealing and opening the bypass passage; and a housing (35) disposed between the separator (16) and the plate (7) of the stationary volute, comprising a first portion sealingly mounted in a recess (44) defined by the separator (16) and arranged in parallel to the longitudinal axis (A) of the compressor.
Abstract:
Ce système de réfrigération (1) comprend un circuit de circulation (2) d'un fluide frigorigène comportant notamment un dispositif de compression (6) comprenant des premier et deuxième compresseurs (7, 8), chaque compresseur comprenant un corps (9) comportant d'une part une partie basse pression (11) contant un moteur (12) et un carter d'huile (13), et d'autre part un orifice d'admission (15) de fluide frigorigène débouchant dans la partie basse pression, des première et deuxième conduites de dérivation (21, 22) mettant en communication une conduite de distribution de fluide frigorigène respectivement avec les orifices d'admission (15) des compresseurs (7, 8), une conduite d'égalisation de niveau d'huile (23) mettant en communication les carters d'huile (13) des compresseurs, et une conduite d'égalisation de pression (24) mettant en communication les parties basse pression (11) des compresseurs. La première conduite de dérivation comprend des moyens de réduction de la section d'écoulement du gaz frigorigène dans ladite conduite de dérivation.
Abstract:
Ce compresseur comprend une volute fixe (8) et une volute mobile (11) comportant chacune un plateau (9, 12) équipé d'une spirale(10, 13), les spirales délimitant des chambres de compression de volume variable(14), un conduit de refoulement (15) ménagé dans le plateau (9) de la volute fixe (8), une ouverture de refoulement (27) agencée pour mettre en communication le conduit de refoulement (15) et une chambre de refoulement(16),un dispositif antiretour comprenant un siège de clapet (28) entourant l'ouverture de refoulement (27), et un clapet de refoulement (29) mobile entre des positions d'obturation et de libération de l'ouverture de refoulement (27). Le compresseur comprend au moins un passage de dérivation (32) comprenant une première extrémité débouchant dans le conduit de refoulement (15) à un emplacement situé entre la chambre de compression centrale (14a) et le siège de clapet (28), et une seconde extrémité débouchant dans une chambre de compression intermédiaire(14b) ou dans une portion à basse pression du compresseur, et au moins un clapet de dérivation (39) mobile entre des positions d'obturation et de libération du passage de dérivation (32, 35).