Diffuser for centrifugal compressor

Details Diffuser for centrifugal compressor Diffuser for centrifugal compressor

2010-01-12

2010-12-07

Nguyen, Ninh H (Department: 3745)

Rotary kinetic fluid motors or pumps

Including casing part selectively movable relative to fixed...

Circularly around fixed runner axis

C415S206000, C415S211200

Reexamination Certificate

active

07845900

ABSTRACT:
A discharge region of a centrifugal compressor is provided. A scroll casing is asymmetrically formed in a circumferential direction and configured to be positioned in different angular positions in the circumferential direction. A vaned diffuser is configured to be positioned in different angular positions in the circumferential direction. The vaned diffuser includes a plurality of guide elements configured to be arranged in a distributed manner in the circumferential direction. Means are provided for positioning the vaned diffuser with regard to an angular position of the asymmetrically formed scroll casing. An angular spacing of two guide elements which are arranged adjacently to each other differs from an angular spacing of two other guide elements which are arranged adjacently to each other. By varying the angular spacings between two adjacent guide vanes of a diffuser along the circumference, the resonance vibration of the compressor can be reduced.

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Notification Concerning Transmittal of International Preliminary Report on Patentability (Forms PCT/IB/326 and PCT/IB/373) and the Written Opinion of the International Searching Authority (Form PCT/ISA/237) issued in corresponding International Application No. PCT/EP2008/058941 dated Jan. 21, 2010, and the English Translation (Forms PCT/IB/338, PCT/IB/373 and PCT/ISA/237) dated Feb. 18, 2010.
International Search Report (PCT/ISA/210) for PCT/EP2008/058941 mailed Nov. 12, 2008.
European Search Report for EP 07112348.3 dated Jan. 14, 2008.

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