公开(公告)号：US12025146B2

公开(公告)日：2024-07-02

申请号：US17261953

申请日：2019-08-06

Applicant: FPZ S.p.A.

Inventor： Andrea Lazari ,  Andrea Cattanei ,  Sergio Ettore Ferigo

IPC: F04D29/28 ,  F01D5/04 ,  F01D5/10 ,  F01D5/14 ,  F02M37/04 ,  F04D5/00 ,  F04D13/06 ,  F04D23/00 ,  F04D29/18 ,  F04D29/30 ,  F04D29/42 ,  F04D29/66

CPC classification number: F04D29/281 ,  F01D5/04 ,  F01D5/048 ,  F01D5/10 ,  F01D5/14 ,  F01D5/141 ,  F02M37/048 ,  F04D5/002 ,  F04D13/06 ,  F04D23/008 ,  F04D29/188 ,  F04D29/30 ,  F04D29/4206 ,  F04D29/666 ,  F05D2240/303 ,  F05D2260/96 ,  F05D2260/961

Abstract: A fluid working machine comprises a rotor (7) with a blading (10) comprising 40 to 65 blades that radially project out of a body central and are suitably circumferentially offset on a plane normal to the axis of symmetry of the rotor, according to an appropriate spacing rule that can eliminate or appreciably attenuate the acoustic emission components that are mostly annoying to the human ear or at frequencies close to the resonance frequencies of other parts of the working machine.

公开(公告)号：US20210301830A1

公开(公告)日：2021-09-30

申请号：US17261953

申请日：2019-08-06

Applicant: FPZ S.p.A.

Inventor： Andrea LAZARI ,  Andrea CATTANEI ,  Sergio Ettore FERIGO

IPC: F04D29/28 ,  F04D13/06 ,  F04D29/42

Abstract: A fluid working machine comprises a rotor (7) with a blading (10) comprising 40 to 65 blades that radially project out of a body central and are suitably circumferentially offset on a plane normal to the axis of symmetry of the rotor, according to an appropriate spacing rule that can eliminate or appreciably attenuate the acoustic emission components that are mostly annoying to the human ear or at frequencies close to the resonance frequencies of other parts of the working machine.