The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 14, 2020
Filed:
Jun. 20, 2016
Danfoss Commercial Compressors, Trevoux, FR;
Arnaud Daussin, Saint Germain au Mont D'or, FR;
Patrice Bonnefoi, Saint Didier au Mont D'or, FR;
Nicolas Nouyrigat, Lyons, FR;
Danfoss A/S, Nordborg, DK;
Abstract
The centrifugal compressor includes an hermetic housing; a drive shaft (); a first and a second compression stage () configured to compress a refrigerant, the first and second compression stages () respectively including a first and a second impeller (), the first and second impellers () being connected to the drive shaft () and being arranged in a back-to-back configuration; a radial annular groove () formed between the back-sides () of the first and second impellers (); an inter-stage sealing arrangement () provided between the first and second compressor stages () and in the radial annular groove (); a radial bearing arrangement configured to rotatably support the drive shaft (); and a thrust bearing arrangement configured to limit an axial movement of the drive shaft () during operation. The diameter of the inter-stage sealing arrangement () is configured to minimize the amplitude of the axial load applying on the thrust bearing arrangement during operation of the centrifugal compressor ().