Safran Aircraft Engines

Snecma

Philippe Vertenoeuil

Bellal Waissi

Petar Tomov

Augustin Curlier

Nicolas Potel

Lauranne Sophie Mottet

Thomas Chauveau

Gilles Brun

Sébastien Gameiro

José Rodrigues

A jet pump for a system for supplying fluid to a turbomachine. The jet pump includes an active fluid inlet pipe including a tube delimiting the inlet pipe, and a passive fluid inlet pipe that is fluidically separated from the active fluid inlet pipe by the tube. The active fluid inlet pipe includes at least one twisted blade that is positioned within the tube and is configured to make the active fluid rotate with respect to the axis of the tube.

Jet pump for a turbomachine, comprising blading for imparting rotation to active fluid

A method of regulating a feed circuit including at least a first pump and an upstream duct leading to the first pump, the method including the steps of: determining the gas content of a flow in the upstream duct feeding the first pump; and, when the value of the gas content in the upstream duct, as determined in the determining step, is greater than or equal to a predetermined threshold value, modifying the flow rate of the flow feeding the first pump.

Method for regulating a supply circuit

A cartridge for a filtering device, includes a cylindrically arranged pleated cloth, the pleats being parallel to the generatrix of the cylinder, wherein the cylinder includes a non-pleated region which is to be placed across from a fuel inlet into the filtering device.

Fuel filter having high resistance to icing

A system for supplying a turbine engine with fluid includes a first low-pressure pump, a downstream hydraulic resistance and a high-pressure volumetric pump located between the first low-pressure pump and the downstream hydraulic resistance. The downstream hydraulic resistance includes at least one element selected among a fluid proportioning unit, a filter, a flow meter, an exchanger, a cut-off valve and an injection system. The supply system includes a second low-pressure pump and a supply variator configured such as to vary the flow of fluid supplied to the second low-pressure pump, the second low-pressure pump and the supply variator being located parallel to the first low-pressure pump.

System for supplying a turbine engine with fluid having a low pressure pumping assembly comprising two pumps in parallel

The invention relates to a hydraulic connection device comprising a part with an opening for the throughflow of hydraulic fluid and a tubular rod with an end fitting, the end fitting of the rod being hydraulically connected to the opening for the throughflow of the fluid, wherein the opening and the end fitting of the rod each have a portion of surface which is shaped so as to allow a certain angular movement between the part and the rod, a seal being inserted between said two surface portions.

Hydraulic connection device and fluid transfer system using said device

A fuel circuit of a turbomachine, this circuit including a fuel return valve connected to the main fuel circuit and to a tank, the valve being able to take a first and a second open position, separate from one another, and a closed position, two primary hydraulic lines connecting the valve to the main circuit and including, respectively, first and second filters through which the fuel passes when the valve is in its first open position, two secondary hydraulic lines which connect the valve to the main circuit and which are positioned in relation to the first and second filters in such a way that the circulation of fuel in these secondary lines contributes, respectively, to the cleaning of the first and second filters, the fuel circulating in the secondary lines when the valve is in its second open position.

Turbomachine fuel circuit

A geared fuel pump (') operates to supply a determined flow but at low or zero pressure rise. It is planned to add gland packing () between support bearings () of the pinions (), or between some of them, to provide hydrodynamic lift for these bearings, by delimiting a closed cavity () to provide lift by a fluid with better viscosity properties instead of using the fluid itself that is pumped. Possible application to fuel pumps for aircraft engines, in which the pump (&#x2032;) is a high pressure pump associated with a low pressure pump.

Gear pump intended, in particular, as a high pressure fuel pump

A device for controlling feed of fluid to equipment, such as a heat exchanger, the device including: a fluid slide valve mounted in a fluid circuit including a slide movable between two positions, a first position in which it allows the fluid to flow through the equipment, and a second position in which it prevents the fluid from flowing through the equipment; a laminar flow constriction arranged in the fluid circuit upstream from the slide valve; and a drive mechanism moving the slide of the slide valve between its two positions by head loss of the fluid in the laminar flow constriction.

Fluid circuit in a turbine engine

A two stage pump (), where the high pressure stage (') is a gear pump (), comprises a driving of the other stage (&#x2032;) by a support shaft (), mounted in the driven pinion (), the shaft () being driven by the drive shaft (), by means of a pair of toothed wheels () adjacent to the rest of the stage (&#x2032;), which can allow different rotation speeds between the two stages (). The support shaft () may be supported by stops and hydrodynamic bearings, directly integrated and lubricated in the driven pinion, which make the design lighter and more compact. The shaft () and the toothed wheels () ingeniously transmit the loads from the stage (&#x2032;) to the stage (&#x2032;) in such a way as to cancel out the usual hydraulic loads, stemming from pressure, and mechanical, forces stemming from rotational drivings on the driven pinion ().

Two stage pump, particularly provided as main pump for supplying an aircraft engine with fuel

The invention provides a test bench for characterizing a flow of a two-phase fluid, the test bench comprising a fluid tank, a first pump suitable for taking fluid from the tank and for feeding first and second lines connected in parallel, each line being provided in succession, from upstream to downstream in the flow direction of the fluid, with: injection means for injecting air into the fluid; measurement means suitable for providing information about the proportion of the vapor phase relative to the liquid phase of the fluid; and a second pump or a Venturi.

Bench test, for the characterization of a flow of a two-phase fluid

A fuel circuit for a turbine engine is provided. The fuel circuit includes a fuel return valve connected to the main circuit and to a fuel tank, the valve being capable of adopting an open position in which the valve allows an excess quantity of fuel to be returned to the tank, and a closed configuration in which the return of fuel to the tank is blocked; a first hydraulic line connecting the valve to the main circuit, and including a first filter; a second hydraulic line connecting the valve to the main circuit, and including a second filter; and an intermediate hydraulic line connected to the first and second lines downstream from the filters, the first and second lines being hydraulically connected together by the intermediate line when the valve is in the closed configuration.

Fuel circuit of a turbine engine

A device includes a first hot fuel bleed, a second cold fuel bleed, a fuel pressure regulator including a fuel inlet line, a fuel outlet line and a fuel pressure set point line, the pressure of the outlet line being set by the regulator to a fixed divergence from the pressure of the set point line, a first connector to connect the first bleed to the inlet line of the regulator and the second bleed to the set point line of the regulator, when a first pressure of the first bleed is greater than or equal to a second pressure of the second bleed and to connect the first bleed to the set point line of the regulator and the second bleed to the inlet line of the regulator when the first pressure is lower than the second pressure, and a second connector.

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Paris, France

Philippe Vertenoeuil