Additive inflatable leak check bladder
A conformal sealing fixture includes an inflatable bladder having a bladder body, a sealing surface, and an intake port. The bladder body has an outer skin surrounding a hollow inner volume, which is configured to expand to a rigid or semi-rigid structure when in an inflated state and to collapse to a flaccid structure when in a deflated state. The sealing surface is configured to form a leak-tight seal against a port in a component assembly. The intake port is configured to direct a pressurizing fluid into and out of the hollow inner volume of the bladder body to inflate the bladder to the inflated state and deflate the bladder body to the deflated state.
1 . A conformal sealing fixture for a component assembly positioned in an industrial assembly comprising:
an inflatable bladder having:
a bladder body having an outer skin surrounding a hollow inner volume, wherein the bladder body is formed from an elastomeric material such that the bladder body is configured to expand to a rigid or semi-rigid structure when in an inflated state and to collapse to a flaccid structure when in a deflated state and wherein at least a portion of the outer skin comprises an isogrid structure;
a sealing surface, wherein the sealing surface is configured to form a leak-tight seal against a port in the component assembly; and
an intake port configured to direct a pressurizing fluid into and out of the hollow inner volume of the bladder body to inflate the bladder to the inflated state and deflate the bladder body to the deflated state;
wherein the bladder body is configured to be positioned within a constrained space in the industrial assembly when the bladder body is in the deflated state and is configured to conform to a geometry of the constrained space when the bladder body is in the inflated state, such that when the bladder body is in the inflated state, the sealing surface engages with the port in the component assembly to form a leak-tight seal.
2 . The conformal sealing fixture of claim 1 , wherein the elastomeric material is selected from the group consisting of natural rubber, artificial rubber, polyurethane, and silicone rubber.
3 . The conformal sealing fixture of claim 2 , wherein the elastomeric material is a light-curable resin useful in a stereo lithography process.
4 . The conformal sealing fixture of claim 1 , wherein the component assembly is configured to operate as a fluid conduit in the industrial assembly.
5 . The conformal sealing fixture of claim 1 , wherein the constrained space includes one or more interior structures that impede access to the port in the component assembly.
6 . The conformal sealing fixture of claim 1 , wherein the industrial assembly is a structure of a gas turbine engine.
7 . The conformal sealing fixture of claim 1 , wherein the elastomeric material is a light-curable resin that is selected to impart desirable friction characteristics to the outer skin to stabilize and support the conformal sealing fixture in the constrained space.
8 . A method of leak checking a component assembly positioned in an industrial assembly, comprising the steps of:
inserting an inflatable bladder into a constrained space of the industrial assembly, wherein the inflatable bladder is in a deflated state;
inflating the inflatable bladder to a rigid or semi-rigid inflated state by directing a pressurizing fluid through an intake port in the inflatable bladder into a hollow inner volume of a bladder body, thereby causing the inflatable bladder to conform to a geometry of the constrained space and causing a sealing surface of the inflatable bladder to engage with a port in the component assembly to form a leak-tight seal;
conducing a leak check test on the component assembly, wherein the bladder body includes an outer skin that defines the hollow inner volume of the bladder body and at least a portion of the outer skin comprises an isogrid structure;
deflating the inflatable bladder by evacuating the pressurizing fluid from the intake port in the inflatable bladder, thereby causing the inflatable bladder to enter a flaccid deflated state; and
removing the inflatable bladder from the constrained space of the industrial assembly.
9 . The method of claim 8 , wherein the bladder body is formed from an elastomeric material such that the bladder body is configured to expand to a semi-rigid structure when in an inflated state and to collapse to a flaccid structure when in a deflated state.
10 . The method of claim 9 , wherein the elastomeric material is selected from the group consisting of natural rubber, artificial rubber, polyurethane, and silicone rubber.
11 . The method of claim 10 , wherein the elastomeric material is a light-curable resin useful in a stereo lithography process.
12 . The method of claim 9 , wherein the elastomeric material is selected to impart desirable friction characteristics to the outer skin to stabilize and support the conformal sealing fixture in the constrained space.
13 . The method of claim 8 , wherein the component assembly is configured to operate as a fluid conduit in the industrial assembly.
14 . The method of claim 8 , wherein the constrained space includes one or more interior structures that impede access to the port in the component assembly.
15 . The method of claim 8 , wherein the industrial assembly is a structure of a gas turbine engine.