An exemplary fluid supply system for use on a turbomachine includes a turbomachine fluid container having a moveable barrier. A pressurized fluid is delivered to one side of the moveable barrier, and an opposing side of the flexible barrier communicates with a source of lubricant. Pressurized fluid
An exemplary fluid supply system for use on a turbomachine includes a turbomachine fluid container having a moveable barrier. A pressurized fluid is delivered to one side of the moveable barrier, and an opposing side of the flexible barrier communicates with a source of lubricant. Pressurized fluid is selectively delivered to the one side to move the moveable barrier between a flow-permitting position that permits flow from the source of lubricant to the turbomachine fluid container and a flow-restricting position that restricts flow from the source of lubricant to the turbomachine fluid container.
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1. A fluid supply system for use on a turbomachine, comprising: a turbomachine fluid container having a moveable barrier, with a pressurized fluid delivered to one side of the moveable barrier, and an opposing side of the moveable barrier communicating with a source of lubricant,wherein pressurized
1. A fluid supply system for use on a turbomachine, comprising: a turbomachine fluid container having a moveable barrier, with a pressurized fluid delivered to one side of the moveable barrier, and an opposing side of the moveable barrier communicating with a source of lubricant,wherein pressurized fluid is selectively delivered to the one side to move the moveable barrier between a flow-permitting position that permits flow from the source of lubricant to the turbomachine fluid container and a flow-restricting position that restricts flow from the source of lubricant to the turbomachine fluid container. 2. The fluid supply system of claim 1, wherein the moveable barrier comprises a flexible barrier. 3. The fluid supply system of claim 1, wherein the moveable barrier comprises a piston. 4. The fluid supply system of claim 1, including a spring configured to move the moveable barrier from the flow-restricting position to the flow-permitting position. 5. The fluid supply system of claim 1, wherein the moveable barrier is a bag-like member. 6. The fluid supply system of claim 1, including a solenoid valve configured to selectively deliver the pressurized fluid to the one side in response to a transition of a turbomachine from a positive g-force environment to a negative g-force environment. 7. The fluid supply system of claim 1, wherein the pressurized fluid is selectively delivered to the one side to move a vent of the turbomachine fluid container between a vent-permitted position that permits venting from the turbomachine fluid container and a vent-restricted position that restricts venting from the turbomachine fluid container. 8. The fluid supply system of claim 1, wherein the pressurized fluid is selectively delivered to a valve to move a vent of the turbomachine fluid container between a vent-permitted position that permits venting from the turbomachine fluid container and a vent-restricted position that restricts venting from the turbomachine fluid container. 9. A geared architecture and oil supply system for a turbomachine comprising: a geared architecture;a holding container having a flexible barrier, with a connection to a source of pressurized fluid to be delivered to one side of the flexible barrier, and an opposing side of the flexible barrier communicating with a source of oil, for delivering oil downstream to a pump; andwherein pressurized fluid is selectively delivered to the one side to move the moveable barrier between a flow-permitting position that permits flow from the source of oil to the holding container and a flow-restricting position that restricts flow from the source of oil to the holding container. 10. The system of claim 9, wherein the source of oil is the geared architecture. 11. The system of claim 9, wherein the pressurized fluid is communicated from a compressor system of a turbomachine. 12. The system of claim 9, wherein the pump delivers the oil to the geared architecture. 13. The system of claim 9, including a solenoid valve configured to selectively deliver the pressurized fluid to the one side in response to a change of a turbomachine from a positive g-force environment to a negative g-force environment. 14. The system of claim 9, wherein the pressurized fluid is selectively delivered to the one side to move the moveable barrier between a vent-permitted position that permits venting from the turbomachine fluid container and a vent-restricted position that restricts venting from the turbomachine fluid container. 15. The system of claim 9, wherein the pressurized fluid is selectively delivered to a valve to move a vent between a vent-permitting position that permits venting from the turbomachine fluid container and a vent-restricting position that restricts venting form the turbomachine fluid container. 16. A method of maintaining positive suction head on a turbomachine fluid in positive g-force environments and negative g-force environments, comprising: selectively introducing a compressed fluid to a holding container to move a flexible barrier against an oil within the holding container, and to cover an inlet that introduces oil to the holding container; andpumping oil from the holding container. 17. The method of claim 16, wherein the compressed fluid is compressed by a compression section of a turbomachine. 18. The method of claim 16, including delivering the oil to a geared architecture of a turbomachine. 19. The method of claim 18, including introducing oil to the holding container from a geared architecture of a turbomachine.
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