Device with a torque-proof first structural component and a second structural component that is connected at least in certain parts in a rotatable manner to the first structural component

Patent metadata

Field	Value
Publication number	US-10041579-B2
Application number	US-201514958397-A
Country	US
Kind code	B2
Filing date	Dec 3, 2015
Priority date	Dec 4, 2014
Publication date	Aug 7, 2018
Grant date	Aug 7, 2018

Abstract

A device includes a torque-proof first structural component and a second structural component rotatably connected to the first component. Hydraulic fluid is guided to lubrication points via the components. A sealing device seals an interface between the components. The interface includes a transition area limited by areas of the components that overlap in the radial direction and which carries hydraulic fluid, and which is connected to supply areas for hydraulic fluid of the first component and transmission areas for hydraulic fluid of the second component. The hydraulic fluid forms a floating hydrodynamic bearing between the components. The sealing device includes at least one thread area in the area of a surface of the second component or of the first component that is facing towards the surface of the first component or the second component.

First claim

The invention claimed is:

1. A device comprising
a fixed first structural component including a supply area for hydraulic fluid;
a second structural component that is connected at least in certain areas in a rotatable manner to the first structural component, the second structural component including a rotational axis and a transmission area for the hydraulic fluid,
an interface between the first structural component and the second structural component,
wherein the hydraulic fluid can be guided to lubrication points via the first structural component and the second structural component,
a sealing device sealing off the interface from an environment of the first and second structural components,
wherein the interface comprises a transition area which is limited by areas of the first and second structural components that overlap in a radial direction and which carries the hydraulic fluid during operation, the transition area connected to the supply area and the transmission area to form an area of hydraulic fluid conduction and a floating hydrodynamic bearing between the first and second structural components,
wherein the sealing device includes a thread area on a surface of at least one chosen from the first structural component and the second structural component, the thread area surrounding the rotational axis and facing toward a surface of the other of the at least one chosen from the first structural component and the second structural component such that when the second structural component rotates relative to the first structural component, there is relative rotation around the rotational axis between the thread area and the at least one chosen from the first structural component and the second structural component;
wherein the thread area includes a first thread portion and a separate second thread portion and the supply area for hydraulic fluid is positioned at a central portion of the interface between the first thread portion and the second thread portion.

2. The device according to claim 1 , and further comprising a recirculation area in an area of at least one chosen from the first structural component and the second structural component that is in proximity to the thread area, the recirculation area connecting the interface to an area of the thread area that is facing away from the interface.

3. The device according to claim 2 , wherein the recirculation area includes a channel or bore in the at least one chosen from the first structural component and the second structural component.

4. The device according to claim 1 , wherein a pitch and height of a turn of a thread of the thread area increase with growing distance from the interface.

5. The device according to claim 1 , wherein the thread area comprises a multi-start thread.

6. The device according to claim 1 , wherein the second structural component includes blade areas that extend substantially in the radial direction and between which the transmission area is provided.

7. The device according to claim 1 , wherein flow cross-sections of the transmission area decreases in a flow direction of the hydraulic fluid in the transmission area from the interface in a direction of the lubrication points.

8. The device according to claim 1 , wherein the transmission area is arranged to extend in the second structural component at a defined angle with respect to the radial direction to guide the hydraulic fluid against a rotational direction of the second structural component and in the radial direction through the transmission area.

9. The device according to claim 1 , wherein the area of the first structural component that limits the transition area of the interface is arranged inside the area of the second structural component that limits the transition area of the interface.

10. The device according to claim 1 , and further comprising bolt elements engaging slotted holes of the first structural component to support the first structural component.

11. The device according to claim 1 , wherein the hydraulic fluid can be guided via the first structural component and the interface radially from the inside to the outside into the second structural component.

12. The device according to claim 1 , and further comprising a plurality of supply areas for the hydraulic fluid arranged in a symmetrically distributed manner over a circumference of the first structural component.

13. The device according to claim 1 , and further comprising a further sealing device including a seal ring, provided on the side of the thread area that is facing away from the interface.

14. The device according to claim 1 , wherein at least one chosen from the first structural component and the second structural component is manufactured by at least one chosen from an ALM method, a 3D printing method and a mechanical manufacturing process.

15. The device according to claim 1 , wherein the area of the second structural component that limits the transition area of the interface is arranged inside the area of the first structural component that limits the transition area of the interface.

16. The device according to claim 1 , wherein the hydraulic fluid can be guided via the first structural component and the interface radially from the outside to the inside into the second structural component.

17. The device according to claim 1 , wherein the thread area includes an axis that is coaxial with the rotational axis.

18. A device comprising
a fixed first structural component including a supply area for hydraulic fluid;
a second structural component that is connected at least in certain areas in a rotatable manner to the first structural component, the second structural component including a rotational axis and a transmission area for the hydraulic fluid,
an interface between the first structural component and the second structural component,
wherein the hydraulic fluid can be guided to lubrication points via the first structural component and the second structural component,
a sealing device sealing off the interface from an environment of the first and second structural components,
wherein the interface comprises a transition area which is limited by areas of the first and second structural components that overlap in a radial direction and which carries the hydraulic fluid during operation, the transition area connected to the supply area and the transmission area to form an area of hydraulic fluid conduction and a floating hydrodynamic bearing between the first and second structural components,
wherein the sealing device includes a thread area on a surface of at least one chosen from the first structural component and the second structural component, the thread area surrounding the rotational axis and facing toward a surface of the other of the at least one chosen from the first structural component and the second structural component such that when the second structural component rotates relative to the first structural component, there is relative rotation around the rotational axis between the thread area and the at least one chosen from the first structural component and the second structural component;
wherein the thread area includes a first thread portion and a separate second thread portion, with the first and second thread portions oriented in opposing directions to both flow the hydraulic fluid toward a central portion of the interface between the first thread portion and the second thread portion during a respective operating rotation between the second structural component and the first structural component.

Assignees

• Rolls Royce Deutschland Ltd & Co Kg

Inventors

• Venter Gideon

Classifications

• F02C7/06 Primary

  Arrangements of bearings (bearings F16C); Lubricating ({of turbo machines F01D25/18; of machines or} engines in general F01M) · CPC title

• F05D2240/55

  Seals · CPC title

• F16H57/0482

  Gearings with gears having orbital motion · CPC title

• F01D25/168

  for axial load mainly · CPC title

• F01D25/183

  Sealing means · CPC title