公开(公告)号：US20170241420A1

公开(公告)日：2017-08-24

申请号：US15521635

申请日：2015-09-08

Applicant: DANFOSS COMMERCIAL COMPRESSORS S.A.

Inventor： Nicolas Nouyrigat ,  Patrice Bonnefoi ,  Yves Rosson ,  Ingrid Claudin ,  Arnaud Daussin

IPC: F04C29/12 ,  F04C27/00 ,  F04C18/02

CPC classification number: F04C29/12 ,  F04C18/0215 ,  F04C18/0223 ,  F04C27/001

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.

公开(公告)号：US10281046B2

公开(公告)日：2019-05-07

申请号：US15576433

申请日：2016-05-19

Applicant: Danfoss Commercial Compressors

Inventor： Arnaud Daussin ,  Patrice Bonnefoi ,  Yves Rosson ,  Nicolas Nouyrigat

IPC: F01D11/02 ,  F16J15/447 ,  F04D29/08

Abstract: The fluid machine includes a stationary member (6), a rotary member (5) and a labyrinth seal (9) including a succession of stationary steps (11) formed on the stationary member (6), and a succession of rotary steps (14) formed on the rotary member (5). The labyrinth seal (9) further includes a plurality of stationary recesses (18) each formed in a radial wall portion (12) of a respective stationary step (11), and a plurality of rotary recesses (21) each formed in a radial wall portion (16) of a respective rotary step (14). Each stationary step (11) defines a stationary projection (19) delimited by the stationary recess (18) formed on said stationary step (11), and each rotary step (14) defines a rotary projection (22) delimited by the rotary recess (21) formed on said rotary step (14). The axial width (Wr) of each of the stationary recesses (18) and of the rotary recesses (21) substantially equals the axial width (Wp) of each of the stationary projections (19) and of the rotary projections (22).

公开(公告)号：US20180156337A1

公开(公告)日：2018-06-07

申请号：US15576433

申请日：2016-05-19

Applicant: Danfoss Commercial Compressors

Inventor： Arnaud Daussin ,  Patrice Bonnefoi ,  Yves Rosson ,  Nicolas Nouyrigat

IPC: F16J15/447

CPC classification number: F16J15/4472 ,  F01D11/02 ,  F04D29/08 ,  F05D2220/30 ,  F05D2240/55

Abstract: The fluid machine includes a stationary member (6), a rotary member (5) and a labyrinth seal (9) including a succession of stationary steps (11) formed on the stationary member (6), and a succession of rotary steps (14) formed on the rotary member (5). The labyrinth seal (9) further includes a plurality of stationary recesses (18) each formed in a radial wall portion (12) of a respective stationary step (11), and a plurality of rotary recesses (21) each formed in a radial wall portion (16) of a respective rotary step (14). Each stationary step (11) defines a stationary projection (19) delimited by the stationary recess (18) formed on said stationary step (11), and each rotary step (14) defines a rotary projection (22) delimited by the rotary recess (21) formed on said rotary step (14). The axial width (Wr) of each of the stationary recesses (18) and of the rotary recesses (21) substantially equals the axial width (Wp) of each of the stationary projections (19) and of the rotary projections (22).

公开(公告)号：US10605244B2

公开(公告)日：2020-03-31

申请号：US15521635

申请日：2015-09-08

Applicant: DANFOSS COMMERCIAL COMPRESSORS S.A.

Inventor： Nicolas Nouyrigat ,  Patrice Bonnefoi ,  Yves Rosson ,  Ingrid Claudin ,  Arnaud Daussin

IPC: F01C1/02 ,  F04C18/02 ,  F04C29/12 ,  F04C27/00

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.

公开(公告)号：US20180142694A1

公开(公告)日：2018-05-24

申请号：US15735301

申请日：2016-06-20

Applicant: DANFOSS COMMERCIAL COMPRESSORS

Inventor： Arnaud Daussin ,  Patrice Bonnefoi ,  Nicolas Nouyrigat

IPC: F04D29/10 ,  F04D29/051 ,  F04D29/056

CPC classification number: F04D29/102 ,  F04D17/12 ,  F04D17/122 ,  F04D25/06 ,  F04D29/051 ,  F04D29/053 ,  F04D29/056 ,  F04D29/286

Abstract: The centrifugal compressor includes an hermetic housing; a drive shaft (4); a first and a second compression stage (8, 9) configured to compress a refrigerant, the first and second compression stages (8, 9) respectively including a first and a second impeller (18, 19), the first and second impellers (18, 19) being connected to the drive shaft (4) and being arranged in a back-to-back configuration; a radial annular groove (27) formed between the back-sides (25, 26) of the first and second impellers (18, 19); an inter-stage sealing arrangement (35) provided between the first and second compressor stages (8, 9) and in the radial annular groove (27); a radial bearing arrangement configured to rotatably support the drive shaft (4); and a thrust bearing arrangement configured to limit an axial movement of the drive shaft (4) during operation. The diameter of the inter-stage sealing arrangement (35) is configured to minimize the amplitude of the axial load applying on the thrust bearing arrangement during operation of the centrifugal compressor (2).