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1. (WO1979000043) PRESSURE VARIATION ABSORBER
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/1979/000043 International Application No.: PCT/US1978/000042
Publication Date: 08.02.1979 International Filing Date: 12.07.1978
IPC:
F04D 29/66 (2006.01)
F MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
04
POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
D
NON-POSITIVE-DISPLACEMENT PUMPS
29
Details, component parts, or accessories
66
Combating cavitation, whirls, noise, vibration, or the like; Balancing
Applicants:
Inventors:
Priority Data:
81533013.07.1977US
Title (EN) PRESSURE VARIATION ABSORBER
(FR) DISPOSITIF D"AMORTISSEMENT DES VARIATIONS DE PRESSION
Abstract:
(EN) Pressure variation absorbing apparatus (10) is mounted adjacent to a moving fluid stream in the diffuser (14) of a centrifugal compressor for absorbing both acoustic and aerodynamic pressure variations. The absorbing apparatus (10) when mounted as a part of the diffuser wall of a centrifugal compressor not only reduces acoustic noise but also absorbs aerodynamic pressure variations increasing the efficiency of the compressor and simultaneously reducing the rate of flow at which surge occurs thereby enlarging the operational flow range of the compressor. A method of absorbing pressure variations in a moving fluid stream is also disclosed.
(FR) Un dispositif d"amortissement des variations des pressions (10) est dispose de facon adjacente a un courant de fluides dans le diffuseur (14) d"un compresseur centrifuge afin d"amortir a la fois les variations de la pression acoustique et aerodynamique. L"appareil (10) lorsqu"il constitue une partie de la paroi du diffuseur d"un compresseur centrifuge non seulement reduit le niveau sonore mais amortit egalement les variations de pression aerodynamique, et ameliore le rendement du compresseur tout en reduisant le debit auquel apparaissent les a-coups de pression, elargissant ainsi la gamme des debits de fonctionnement du compresseur. Un procede d"amortissement des variations de pression dans un debit de fluide est egalement decrit.
Designated States:
Publication Language: English (EN)
Filing Language: English (EN)
Also published as:
SU01253435DE000003522306GB2160433