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1. US20200309142 - COMPACT VARIABLE GEOMETRY DIFFUSER MECHANISM

Office United States of America
Application Number 16650277
Application Date 21.09.2018
Publication Number 20200309142
Publication Date 01.10.2020
Publication Kind A1
IPC
F04D 27/02
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
04POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
DNON-POSITIVE-DISPLACEMENT PUMPS
27Control, e.g. regulation, of pumps, pumping nstallations or pumping systems specially adapted for elastic fluids
02Surge control
F04D 29/46
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
04POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
DNON-POSITIVE-DISPLACEMENT PUMPS
29Details, component parts, or accessories
40Casings; Connections for working fluid
42for radial or helico-centrifugal pumps
44Fluid-guiding means, e.g. diffusers
46adjustable
CPC
F05D 2250/52
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
05INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
DINDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
2250Geometry
50Inlet or outlet
52Outlet
F04D 27/0246
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
DNON-POSITIVE-DISPLACEMENT PUMPS
27Control, e.g. regulation, of pumps, pumping installations or systems
02Surge control
0246by varying geometry within the pumps, e.g. by adjusting vanes
F04D 29/464
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
DNON-POSITIVE-DISPLACEMENT PUMPS
29Details, component parts, or accessories
40Casings; Connections of working fluid
42for radial or helico-centrifugal pumps
44Fluid-guiding means, e.g. diffusers
46adjustable
462especially adapted for elastic fluid pumps
464adjusting flow cross-section, otherwise than by using adjustable stator blades
Applicants Johnson Controls Technology Company
Inventors Jordan Q. Steiner
Paul W. Snell
Title
(EN) COMPACT VARIABLE GEOMETRY DIFFUSER MECHANISM
Abstract
(EN)

A diffuser system for a centrifugal compressor is provided. The diffuser system includes a nozzle base plate (206) that defines a diffuser gap (212), support blocks (216, 246), and a drive ring (220) rotatable relative to the support blocks. The drive ring includes cam tracks (224, 242) and bearing assemblies (226, 234) positioned proximate an outer circumference of the drive ring. The diffuser system further includes drive pins (214) extending through the support blocks and the nozzle base plate. The first end of each drive pin includes a cam follower (218) mounted into a cam track on the drive ring. The second end of each drive pin is coupled to a diffuser ring (208). Rotation of the drive ring causes axial movement of the drive pins by movement of the cam followers in the cam tracks. This results in movement of the diffuser ring to control fluid flow through the diffuser gap.

Also published as
JP2020517099