公开(公告)号：US12084988B2

公开(公告)日：2024-09-10

申请号：US17593226

申请日：2020-03-06

申请人： NUOVO PIGNONE TECNOLOGIE—S.r.l.

发明人： Michelangelo Bellacci ,  Gianfranco Maffulli ,  Lorenzo Cosi ,  Nicola Ciarla

IPC分类号： F01D5/28 ,  C10G11/18 ,  C10G75/00 ,  F01D5/20 ,  F01D11/12

CPC分类号： F01D5/288 ,  C10G11/18 ,  C10G75/00 ,  F01D5/20 ,  F01D11/122 ,  F05D2220/62 ,  F05D2230/90 ,  F05D2240/307 ,  F05D2300/6111

摘要： A blade for fluid catalytic cracking (FCC) flue hot gas expander with a layer of hard abrasive material localized on the blade tip that contributes to reducing the accumulation of FCC catalyst residuals in the expander.

公开(公告)号：US20220163047A1

公开(公告)日：2022-05-26

申请号：US17103535

申请日：2020-11-24

申请人： Nuovo Pignone Tecnologie - S.R.L.

发明人： Riccardo Brogelli ,  Michelangelo Bellacci

IPC分类号： F04D29/28 ,  F01D5/02 ,  C23C24/04

摘要： A shrouded impeller for centrifugal compressors, and methods for manufacturing shrouded impellers for centrifugal compressors are provided. In one embodiment, the method includes manufacturing an impeller base, then depositing by cold spraying at least one layer of metallic material on the surface of the frontal part of the impeller corresponding to the shroud of the impeller and machining the impeller to complete and finish the structure thereof. The at least one layer deposited by cold spraying may include grooves adapted to optimize the dynamic behavior of the impeller by modifying and tuning the local natural frequencies.