Squeeze film damper assembly for a turbine engine
A squeeze film damper assembly for a turbine engine includes an annular bearing support and an annular damper housing. The annular bearing support includes an inner support segment and an outer support segment located radially outward of the inner support segment. The inner support segment and the outer support segment are spaced apart to define a support channel therebetween. The annular damper housing is at least partially received in the support channel to define an inner damping chamber and an outer damping chamber, the inner damping chamber being radially inward of the outer damping chamber, the inner damping chamber and the outer damping chamber each capable of being filled with an amount of lubricant to provide a squeeze film damper at the inner damping chamber, the outer damping chamber, or both.
1 . A squeeze film damper assembly for a turbine engine, the squeeze film damper assembly comprising:
an annular bearing support configured to support a rotating component, the annular bearing support including an inner support segment and an outer support segment located radially outward of the inner support segment, the inner support segment and the outer support segment spaced apart to define a support channel therebetween; and
an annular damper housing at least partially received in the support channel to define an inner damping chamber and an outer damping chamber, the inner damping chamber being radially inward of the outer damping chamber, the inner damping chamber and the outer damping chamber each capable of being filled with an amount of lubricant to provide a squeeze film damper at the inner damping chamber, the outer damping chamber, or both, the annular damper housing capable of moving radially relative to the annular bearing support to alter a radial dimension of at least one of the inner damping chamber or the outer damping chamber.
2 . The squeeze film damper assembly of claim 1 , wherein the inner damping chamber includes a plurality of seals spaced apart in an axial direction to define an axial dimension of the inner damping chamber, and the outer damping chamber includes a plurality of seals spaced apart in an axial direction to define an axial dimension of the outer damping chamber.
3 . The squeeze film damper assembly of claim 1 , further comprising a controller to individually control the amount of lubricant provided to the inner damping chamber and the outer damping chamber.
4 . The squeeze film damper assembly of claim 1 , wherein selectively providing the amount of lubricant to the inner damping chamber activates an inner squeeze film damper and selectively providing the amount of lubricant to the outer damping chamber activates an outer squeeze film damper.
5 . The squeeze film damper assembly of claim 1 , wherein the inner damping chamber is located radially between the inner support segment of the annular bearing support and a radially inner surface of the annular damper housing.
6 . The squeeze film damper assembly of claim 1 , wherein one of the inner damping chamber or the outer damping chamber is located radially between the outer support segment of the annular bearing support and a radially outer surface of the damper housing.
7 . The squeeze film damper assembly of claim 1 , further comprising a third damping chamber located radially outward of the inner damping chamber and radially inward of the outer damping chamber.
8 . The squeeze film damper assembly of claim 1 , further comprising a third damping chamber located at a same radial location as, and axially spaced apart from, one of the inner damping chamber or the outer damping chamber.
9 . The squeeze film damper assembly of claim 8 , further comprising a third lubricant circuit fluidly connecting the third damping chamber to a lubricant source, the third lubricant circuit including a third lubricant control valve to control an amount of lubricant provided to the third damping chamber.
10 . The squeeze film damper assembly of claim 1 , wherein the inner damping chamber is sized to provide a squeeze film damper providing a first damping value, and the outer damping chamber is sized to provide a squeeze film damper providing a second damping value different from the first damping value.
11 . The squeeze film damper assembly of claim 10 , wherein the first damping value and the second damping value target different vibration modes of a rotating component.
12 . The squeeze film damper assembly of claim 1 , further comprising a lubricant source fluidly connected to the inner damping chamber by a first lubricant circuit and to the outer damping chamber by a second lubricant circuit.
13 . The squeeze film damper assembly of claim 12 , wherein the first lubricant circuit includes a lubricant control valve to control an amount of lubricant provided to the inner damping chamber and the second lubricant circuit includes a lubricant control valve to control an amount of lubricant provided to the outer damping chamber.
14 . The squeeze film damper assembly of claim 1 , wherein the damper housing includes an inner housing segment and an outer housing segment located radially outward of the inner housing segment, the inner housing segment and the outer housing segment spaced apart to define a housing channel therebetween.
15 . The squeeze film damper assembly of claim 14 , wherein the outer damping chamber is located between the outer support segment of the annular bearing support and the outer housing segment of the damper housing.
16 . A method of damping vibrations of a rotating component of a turbine engine, the method comprising:
selectively providing lubricant to:
a first damping chamber to activate a first squeeze film damper, the first damping chamber fluidly connected to a lubricant source by a first lubricant circuit, the first lubricant circuit including a first lubricant control valve; and
a second damping chamber to activate a second squeeze film damper, the second damping chamber fluidly connected to the lubricant source by a second lubricant circuit, the second lubricant circuit including a second lubricant control valve, the first damping chamber and the second damping chamber defined by an annular damper housing at least partially received between an inner support segment and an outer support segment of an annular bearing support, the annular damper housing being capable of moving radially relative to the annular bearing support to alter a radial dimension of at least one of the first damping chamber or the second damping chamber.
17 . The method of claim 16 , wherein the first squeeze film damper provides a first damping value, and the second squeeze film damper provides a second damping value different from the first damping value.
18 . The method of claim 17 , wherein the first damping value and the second damping value target different vibration modes of a rotating component.
19 . The method of claim 16 , further comprising selectively providing the lubricant to a third damping chamber to activate a third squeeze film damper, the third damping chamber fluidly connected to the lubricant source by a third lubricant circuit, the third lubricant circuit including a third lubricant control valve.
20 . The method of claim 19 , wherein the first squeeze film damper provides a first damping value, the second squeeze film damper provides a second damping value, and the third squeeze film damper provides a third damping value that is different from at least one of the first damping value or the second damping value.