Device for supplying and distributing fluid

Patent metadata

Field	Value
Publication number	US-9616992-B2
Application number	US-201314093779-A
Country	US
Kind code	B2
Filing date	Dec 2, 2013
Priority date	Dec 5, 2012
Publication date	Apr 11, 2017
Grant date	Apr 11, 2017

Abstract

The device is intended to supply a rotating linear displacement actuator capable of controlling the pitch of the blades of a propeller, according to separate operating states, from a rotary power assembly, the device being arranged so as to be located between the power assembly and the actuator, along a longitudinal axis, and being connected in rotation therewith. According to the invention, the device comprises supplies for supplying fluid interacting with the power assembly and defining as many supplies as there are operating states of the actuator, and a fluid distributor to which the supplies are connected and having separate channels for transporting the fluid in the direction of the actuator according to the operating states, by a tubular equipment connected to the distributor.

First claim

The invention claimed is:

1. A device for supplying and distributing fluid for a rotating linear displacement actuator to control a pitch of blades of a propeller, according to separate operating states, through a rotary power assembly, said device being arranged so as to be located between the power assembly and the rotating linear displacement actuator, along a longitudinal axis, and being connected in rotation therewith, the device comprising:
a supply mechanism to supply fluid comprising radial arms having internal passages to interact with said power assembly and to define as many supplies as there are operating states of the rotating linear displacement actuator,
a fluid distributor to which the internal passages of the arms of said supplies are connected, and having separate channels to separately transport the fluid in a direction of the rotating linear displacement actuator according to the operating states of the rotating linear displacement actuator, and
a tubular equipment connected coaxially to the distributor and forming two independent chambers, each of said two independent chambers being connected to one lateral channel among the separate channels of the distributor transporting the fluid, each of said two independent chambers to be selectively in communication with said rotating linear displacement actuator to select one of two operating states of the rotating linear displacement actuator, the distributor comprising another central channel among the separate channels, along a common axis, to be in direct communication with a supply tube of the rotating linear displacement actuator for another operating state of the rotating linear displacement actuator.

2. The device according to claim 1 , wherein the radial arms are fixed to the distributor, and the internal passage of each of said arms ends in a respective input cavity in connection with a supply tube of the respective supply mechanism passing through the power assembly, and through a respective output cavity leading into the distributor.

3. The device according to claim 2 , wherein the separate channels of the fluid distributor comprise compartments to receive output cavities of the radial arms, each compartment and the associated output cavity being interconnected in a sealing manner by a connecting end piece.

4. The device according to claim 1 , wherein the tubular equipment is cylindrical, along the common axis, and fixed, at one end, to one of transverse faces of the distributor, facing towards the rotating linear displacement actuator, while the supply mechanism is fixed to another transverse face of the distributor facing towards the power assembly.

5. The device according to claim 1 , wherein the tubular equipment comprises two assembled tubular sleeves, respectively external tubular sleeve and internal tubular sleeve, and defines between the external tubular sleeve and the internal tubular sleeve an annular space in connection with one of the separate channels of the distributor, and surrounds a tubular control shaft of the rotating linear displacement actuator by forming, between said rotating linear displacement actuator and the internal tubular sleeve, and also defining, the two independent chambers, one of the two independent chambers being in connection with the annular space and the corresponding separate channel connected to said annular space, and another of the two independent chambers being in connection with another of the separate channels of the distributor.

6. The device according to claim 5 , wherein one or another of the two chambers are to be put in communication with an annular chamber located between the control shaft of the rotating linear displacement actuator and the supply tube of the rotating linear displacement actuator, through orifices made in a wall of said control shaft.

7. The device according to claim 5 , wherein the two independent chambers are adjacent and mutually separated by a transverse partition wall emanating from the internal tubular sleeve or the control shaft.

8. The device according to claim 5 , wherein, at an end of the tubular equipment opposite an end fixed to the distributor, the two assembled tubular sleeves are joined together by a connecting ring held axially in position.

9. A system for adjusting the pitch of the blades of a turbine engine propeller, comprising:
a rotating linear displacement actuator, driven in rotation by a power assembly and supplied by the device to supply and distribute fluid as defined according to claim 1 and according to different operating states of the propeller, and
a transmission mechanism connecting the actuator to the blades of the propeller to be controlled,
wherein the device to supply and distribute fluid is arranged between the power assembly and the rotating linear displacement actuator and connected in rotation therewith.

Assignees

• Snecma

Inventors

• Belmonte Olivier
• Curlier Augustin
• Perrier Mathieu

Classifications

• B64C11/40

  automatic · CPC title

• B64C11/38 Primary

  fluid, e.g. hydraulic · CPC title

• F01D7/00

  Rotors with blades adjustable in operation; Control thereof (for reversing F01D1/30) · CPC title

• Y02T50/66

  Cross-Sectional Technologies · mapped topic

• B64C11/308

  automatic · CPC title