Jet pump comprising an internal nozzle

Patent metadata

Field	Value
Publication number	US-11199203-B2
Application number	US-202016792640-A
Country	US
Kind code	B2
Filing date	Feb 17, 2020
Priority date	Feb 19, 2019
Publication date	Dec 14, 2021
Grant date	Dec 14, 2021

Abstract

The invention relates to a jet pump collector comprising a convergent duct extending along the longitudinal axis (AX) and comprising an intake opening for a fluid to be withdrawn, this convergent duct having a restriction shape terminated by a reduced end having a smaller cross-section than its intake opening. This convergent duct is equipped with a tube ( 17 ) orientated perpendicular to the longitudinal axis longitudinal (AX), this tube ( 17 ) comprising an outer portion extending outside of the convergent duct and being terminated by an intake opening ( 31 ) for a propulsion fluid, and an inner portion extending in the convergent duct and comprising a plurality of distribution openings ( 18, 19 ) for the propulsion fluid which are orientated towards the reduced end.

First claim

The invention claimed is:

1. A collector for a jet pump comprising a convergent duct extending along a longitudinal axis and comprising an intake opening for a fluid to be withdrawn, the convergent duct having a restriction shape terminated by a reduced end having a smaller cross-section than the intake opening, the convergent duct being equipped with a tube positioned between the intake opening and the reduced end, the tube comprising an outer portion extending outside of the convergent duct and being terminated by an intake opening for a propulsion fluid, and an inner portion extending in the convergent duct, the inner portion being orientated perpendicular to the longitudinal axis and comprising a plurality of distribution openings for the propulsion fluid which are orientated towards the reduced end, and wherein the inner portion of the tube has a tapered cross-section defining a tapered leading edge oriented towards the intake opening of the convergent duct.

2. The collector according to claim 1 , wherein the inner portion of the tube has a rectilinear shape.

3. The collector according to claim 1 , wherein the inner portion of the tube has a drop-shaped cross-section.

4. The collector according to claim 1 , wherein the plurality of distribution openings consists of two distribution openings.

5. The collector according to claim 1 , wherein the convergent duct has a conical shape.

6. The collector according to claim 1 , wherein the reduced end has a cross-sectional area that is half a cross-sectional area of the intake opening.

7. A jet pump, comprising the collector according to claim 1 , the collector having a cylindrical portion which is prolonged by a flare terminated by a discharge opening, wherein the reduced end of the convergent duct is prolonged by the cylindrical portion.

Assignees

• Safran Aircraft Engines

Inventors

• Kohn Thierry
• Boujida Benissa
• Lemenand Benjamin
• Pereira Alexis

Classifications

• F04F5/20

  for evacuating · CPC title

• F04F5/44

  Component parts, details, or accessories not provided for in, or of interest apart from, groups F04F5/02 - F04F5/42 · CPC title

• F04F5/00 Primary

  Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow (diffusion pumps F04F9/00; combination of jet pumps with pumps of other than jet type F04B; use of jet pumps for priming or boosting non-positive-displacement pumps F04D) · CPC title

• F04F5/46 Primary

  Arrangements of nozzles · CPC title