Lubrication module for a turbomachine lubrication station

Patent metadata

Field	Value
Publication number	US-12044137-B2
Application number	US-202318336674-A
Country	US
Kind code	B2
Filing date	Jun 16, 2023
Priority date	Jun 17, 2022
Publication date	Jul 23, 2024
Grant date	Jul 23, 2024

Abstract

Lubrication module for at least one lubrication station of a turbomachine, the lubrication module comprising at least one positive displacement pump including a pump body delimiting a main chamber configured to be in fluid communication with a main lubrication circuit and an auxiliary chamber configured to be in fluid communication with an auxiliary lubrication circuit, and a piston movably mounted in the pump body between an inactive configuration and an active configuration, the piston being configured to perform, in the active configuration, a pumping movement between a top dead center and a bottom dead center by cooperation with a cam of a shaft of the turbomachine and, in the inactive configuration, not to cooperate with the cam of the shaft of the turbomachine, the positive displacement pump including a return element configured to return the piston to the active configuration.

First claim

The invention claimed is:

1. A lubrication module for at least one lubrication station of a turbomachine, the lubrication module comprising at least one positive displacement pump including a pump body delimiting a main chamber configured to be in fluid communication with a main lubrication circuit and an auxiliary chamber configured to be in fluid communication with an auxiliary lubrication circuit, and a piston movably mounted in the pump body between an inactive configuration and an active configuration, the piston being configured to perform, in the active configuration, a pumping movement between a top dead center and a bottom dead center by cooperation with a cam of a shaft of the turbomachine and, in the inactive configuration, not cooperate with the cam of the shaft of the turbomachine, the positive displacement pump including a return element configured to return the piston to the active configuration, and the piston extending into the main chamber so that the filling of the main chamber with lubricating fluid beyond a predetermined threshold brings the piston into the inactive configuration.

2. The lubrication module according to claim 1 , wherein, in the active configuration, the piston is configured to pump the fluid through the auxiliary chamber.

3. The lubrication module according to claim 1 , wherein the active configuration corresponds to a phase of windmilling of a fan of the turbomachine or to a phase of idle rotation of the turbomachine.

4. The lubrication module according to claim 1 , comprising an intermediate tank disposed on the auxiliary lubrication circuit, between the lubrication station and the positive displacement pump in the direction of circulation of the lubricating fluid.

5. The lubrication module according to claim 4 , wherein the intermediate tank is disposed between the lubrication station and a pump of the main lubrication circuit in the direction of circulation of the lubricating fluid.

6. The lubrication module according to claim 1 , wherein the piston is configured to prevent, in the inactive configuration, the circulation of fluid through the auxiliary chamber.

7. The lubrication module according to claim 1 , wherein the piston is configured to prevent, in the active configuration, the circulation of fluid through the main chamber.

8. The lubrication module according to claim 1 , wherein the auxiliary chamber has a volume smaller than a volume of the main chamber.

9. The lubrication module according to claim 1 , wherein, in the inactive configuration, the piston is stowed beyond the top dead center and the bottom dead center so as to be at a distance from the cam.

10. A lubrication assembly comprising the lubrication module according to claim 1 and a cam configured to be mounted on a turbomachine shaft and to cooperate with the piston of the lubrication module.

11. The lubrication assembly according to claim 10 , wherein the cam comprises at least three top centers and three bottom centers, each top center corresponding to the top dead center of the piston and each bottom center corresponding to the bottom dead center of the piston.

12. An aircraft turbomachine comprising at least one shaft and at least one lubrication assembly according to claim 10 , whose cam is secured in rotation to the at least one shaft.

13. The aircraft turbomachine according to claim 12 , comprising at least three positive displacement pumps, the three positive displacement pumps being disposed in phase shift around the shaft.

14. The aircraft turbomachine according to claim 12 , wherein the shaft is a shaft of a reduction gear of the turbomachine.

Assignees

• Safran Trans Systems

Inventors

• Badidi Abdallah

Classifications

• F16N2210/08

  Aircraft · CPC title

• F16N2210/02

  Turbines · CPC title

• F16N13/04

  Adjustable reciprocating pumps · CPC title

• F05D2260/98

  Lubrication · CPC title

• F05D2220/323

  for aircraft propulsion, e.g. jet engines · CPC title