Multi-piece grit blast masking boot assembly

Abstract

A boot assembly (10) is configured to hold and mask a portion of a turbine component (12). The boot assembly includes a first boot (14) comprising a boot receiving area (32), a turbine component receiving area (34), and a notch (38) that extends into the turbine component receiving area. A second boot (16) is configured to be received within the boot receiving area of the first boot, the second boot comprising a boot engagement face (56), a turbine engagement portion (70), and a notch (66) extending into the turbine engagement portion. The first and second boots are configured so that when assembled together, the notches of the first and second boots combine to form a continuous notch with an open end and a closed end. The continuous notch is configured to expose both sides of a target part of the turbine component (12) when the turbine component is masked by the boot assembly. A cross-sectional area of the continuous notch is larger toward the open end of the continuous notch than at the closed end of the continuous notch.

Description

TECHNICAL FIELD

[0001] The technology relates to masking devices used during the manufacturing or servicing of turbine components, such as blades or vanes for a gas turbine. In particular, the technology relates to a boot assembly that is affixed to the turbine component during a process to grit blast the component.BACKGROUND

[0002] Turbine components, such as a turbine blades (also referred to as airfoils) or vanes, in a gas turbine are typically subjected to stress from centrifugal force and fluid forces that can cause fracture, yielding, or creep failures. In addition, turbine components often endure temperatures around 2,500 °F (1,370 °C). Such high temperatures can weaken the turbine components and make them more susceptible to creep and corrosion failures. Also, vibrations from the turbine itself can cause fatigue failures.

[0003] One solution employed to improve the durability of and protect turbine components is to add a protective coating to component surfaces. In order to improve the bonding of the protective coating to the turbine component, the turbine component is initially subjected to a grit blast process.

[0004] In one treatment process, multiple turbine components are placed on a turn table and then each turbine component is subjected to a high-pressure stream of abrasive particles. While on the turn table, each turbine component is encased within a corresponding one-piece rubber molded boot that masks portions of the turbine component so that only the desired portion is grit blasted.

[0005] However, the one-piece molded boots are difficult to attach and remove from the turbine components. In addition, because of the difficulty of attaching and removing the one-piece molded boots, the turbine components are often damaged, scratched, or otherwise compromised during the attachment and removal processes.

[0006] Another process uses metal casted boots. However, the metal is too rigid and if not fit precisely results undesired portions of the turbine component being grit blasted.

[0007] A masking system is desired that better masks the turbine components without causing the damage discussed above.SUMMARY

[0008] Disclosed herein are a system and method that is applied to solve the problems discussed above.

[0009] In one aspect of the technology, a boot assembly configured to mask a portion of a turbine component, the boot assembly comprising: a first boot comprising a boot receiving area, a turbine component receiving area, and a notch that extends into the turbine component receiving area; and a second boot configured to be received within the boot receiving area of the first boot, the second boot comprising a boot engagement face, a turbine engagement portion, and a notch that extends into the turbine engagement portion, wherein the first and second boots are configured so that when assembled together, the notches of the first and second boots combine to form a continuous notch with an open end and a closed end, wherein the continuous notch is configured to expose both sides of the turbine component when the turbine component is masked by the boot assembly, and wherein a cross-sectional area of the continuous notch is larger toward the open end of the continuous notch than at the closed end of the continuous notch.

[0010] A further aspect of the technology includes the preceding aspect and wherein the first and second boots comprise projections and recesses that engage each other when the first and second boots are assembled to each other, and wherein when the projections and recesses engage each other, they form tortuous paths to the turbine component receiving area and turbine component engagement portion.

[0011] A further aspect of the technology includes any of the preceding aspects and wherein the first boot comprises an alignment receptacle configured to receive the second boot and align the second boot with the first boot while the second boot is being received in the alignment receptacle.

[0012] A further aspect of the technology includes any of the preceding aspects and wherein the alignment receptacle has an angled surface configured to retain the second boot to the first boot.

[0013] A further aspect of the technology includes any of the preceding aspects and wherein the first and second boots are configured to be assembled together and disassembled from each other without using tools.

[0014] A further aspect of the technology includes any of the preceding aspects and wherein the first and second boots are formed from silicone, hard rubber, polymers, or compound materials.

[0015] A further aspect of the technology includes any of the preceding aspects and further comprises a grip portion configured to be grasped and pulled apart to disassemble the first boot from the second boot.

[0016] A further aspect of the technology includes a boot assembly configured to mask a portion of a turbine component, the boot assembly comprising: a first boot comprising a turbine component receiving area and a notch that extends into the turbine component receiving area; a second boot configured to be received within the boot receiving area of the first boot, the second boot comprising a boot engagement face, a turbine engagement portion, and a notch that extends into the turbine engagement portion; and a securing mechanism configured to secure the first boot to the second boot by way of an interference connection, the securing mechanism comprising a projection and a receptacle configured to receive the projection, wherein the second boot is configured to be secured to the first boot be pressing the first boot against the second boot, wherein the first and second boots are configured so that when assembled together, the notches of the first and second boots combine to form a continuous notch with an open end and a closed end, and wherein a cross-sectional area of the continuous notch is larger toward the open end of the continuous notch than at the closed end of the continuous notch.

[0017] A further aspect of the technology includes the preceding aspect and wherein the first boot comprises an alignment receptacle configured to receive the second boot and align the second boot with the first boot while the second boot is being received in the alignment receptacle.

[0018] A further aspect of the technology includes any of the preceding aspects and wherein the alignment receptacle has an angled surface configured to retain the second boot to the first boot.

[0019] A further aspect of the technology includes any of the preceding aspects and wherein the first and second boots are configured to be assembled together and disassembled from each other without using tools.

[0020] A further aspect of the technology includes any of the preceding aspects and wherein the first and second boots are formed from silicone, hard rubber, polymers, or compound materials.

[0021] A further aspect of the technology includes any of the preceding aspects and further comprises a grip portion configured to be grasped and pulled apart to disassemble the first boot from the second boot.

[0022] A further aspect of the technology includes a boot assembly configured to mask a portion of a turbine component, the boot assembly comprising: a first boot comprising a boot receiving area, a turbine component receiving area, and a notch that extends into the turbine component receiving area; and a second boot configured to be nested within the boot receiving area of the first boot, the second boot comprising a boot engagement face, a turbine engagement portion, and a notch that extends into the turbine engagement portion, wherein a portion of the second boot extends beyond the first boot when the second boot is nested within the boot receiving area of the first boot and the extended portion of the second boot forms a gripping part configured to be grasped by a user to disassemble the second boot from the first boot, wherein the first and second boots are configured so that when assembled together, the notches of the first and second boots combine to form a continuous notch with an open end and a closed end, and wherein a cross-sectional area of the continuous notch is larger toward the open end of the continuous notch than at the closed end of the continuous notch.

[0023] A further aspect of the technology includes the previous aspect and wherein the first and second boots comprise projections and recesses that engage each other when the first and second boots are assembled to each other, and wherein when the projections and recesses engage each other, they form tortuous paths to the turbine component receiving area and turbine component engagement portion.

[0024] A further aspect of the technology includes any of the previous aspects and wherein the first boot comprises an alignment receptacle configured to receive the second boot and align the second boot with the first boot while the second boot is being received in the alignment receptacle.

[0025] A further aspect of the technology includes the previous aspect and wherein the alignment receptacle has an angled surface configured to retain the second boot to the first boot.

[0026] A further aspect of the technology includes the previous aspect and wherein the first and second boots are configured to be assembled together and disassembled from each other without using tools.

[0027] A further aspect of the technology includes the previous aspect and wherein the first and second boots are formed from silicone, hard rubber, polymers, or compound materials.

[0028] A further aspect of the technology includes the previous aspect and further comprises a grip portion configured to be grasped and pulled apart to disassemble the first boot from the second boot.BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Fig. 1 is an exploded view of a boot assembly. Fig. 2 is a perspective view of the boot assembly. Fig. 3 is another perspective view of the boot assembly. Fig. 4 is a side view of the boot assembly. Fig. 5 is another side view of the boot assembly. Fig. 6 is another perspective view of the boot assembly. Fig. 7 is another perspective view of the boot assembly. Fig. 8 is a perspective view of the first boot. Fig. 9 is another perspective view of the first boot. Fig. 10 is a side view of the first boot. Fig. 11 is another side view of the first boot. Fig. 12 is another perspective view of the first boot. Fig. 13 is another perspective view of the first boot. Fig. 14 is a perspective view of the second boot. Fig. 15 is another perspective view of the second boot. Fig. 16 is a side view of the second boot. Fig. 17 is another side view of the second boot. Fig. 18 is another perspective view of the second boot. Fig. 19 is another perspective view of the second boot. Fig. 20 is another perspective view of the second boot. DETAILED DESCRIPTION OF EXAMPLE NON-LIMITING EMBODIMENTS

[0030] Figs. 1-7 illustrate an exemplary boot assembly 10 for masking a turbine component 12. Although the boot assembly 10 is illustrated as having two boots, the boot assembly 10 may have more than two boots (e.g., three, four, or more boots). According to an embodiment, the boot assembly 10 includes a first boot 14 and a second boot 16 nested within a receiving space of the first boot 14. The first and second boots 14, 16 are secured together by way of an interference fit. However, it is contemplated that there are other means (either as an alternative to or in addition to the interference fit) to secure the first boot 14 to the second boot 16. For example, the first and second boots 14, 16, according to an embodiment, are secured to each other by way of a snap fit connection, a dovetail connection, or other releasable mechanical fastener connection.

[0031] According to an embodiment, the boot assembly 10 includes a notch (or window or opening) 18 through which the turbine component 12 is exposed when the turbine component 12 is contained within the boot assembly 10. In an embodiment, the notch 18 extends through both of the first and second boots 14, 16 so that both sides of the targeted portion of the turbine component 12 are exposed and visible.

[0032] The notch 18 has a closed end 20 and an open end 22. A cross-sectional area of the closed end 20 is smaller than a cross-sectional area of the open end 22. It is contemplated that when the turbine component 12 is contained within the boot assembly 10, the targeted portion of the turbine component 12 is located within the closed end 20 of the notch 18 but not in the open end 22. In this configuration, the width W of the notch 18 is less at the closed end 20 than at the open end 22. In addition, the width W of the notch 18, according to another example, is invariable at the closed end 20. In addition, at the open end 22, the width W of the notch 18 may increase in a direction away from the closed end 20 so that the width W of the notch 18 is greatest at the portion of the notch 18 furthest from the closed end 20. This configuration of the notch 18 minimizes or prevents the particles projected toward the turbine component 12 from being captured and remaining within the boot assembly 10.

[0033] The open end 22 of the notch 18, according to an embodiment, is located on a first side of the boot assembly 10, while a gripping portion 24 is located on a second side opposite the first side. The gripping portion 24 is used by the user to separate the first boot 14 from the second boot 16. The gripping portion 24 includes, for example, an extended portion 26 of the second boot 16 that extends beyond the first boot 14 when the second boot 16 is nested within the first boot 14. According to an embodiment, the extended portion 26 includes a recess 28 that is sized to receive a user's fingers. The drawings show the recess 28 facing toward the first boot 14. However, the recess 28 faces other directions as long as the recess 28 is accessible to the user.

[0034] According to an embodiment, the gripping portion 24 also includes one or more flanges 30 located on the second side of the boot assembly 10 opposite the first side. The flanges 30extends in a direction away from the first side of the boot assembly 10 (as shown in Figs. 1-13). However, it is contemplated that the flanges 30 may extend in any other direction as long as the flanges 30 are accessible by the user.

[0035] To disassemble the boot assembly 10 (i.e., separate the first boot 14 from the second boot 16), the user grips the extended portion 26 of the second boot 16 and grips the flanges 30 of the first boot 14. The user then pulls the flanges 30 and the extended portion 26 away from each other, which will in turn overcome the forces holding the first boot 14 to the second boot 16.

[0036] According to an embodiment, the first boot 14 supports the second boot 16 and the turbine component 12 and includes the one or more flanges 30, a boot receiving space 32, a turbine component receiving space 34, one or more securing mechanisms 36, and a notch portion 38. In addition, according to an embodiment, the first boot 14 has a front side 40, a rear side 42 opposite the front side 40, a first lateral side 44 extending from the front side 40 to the rear side 42, a second lateral side 46 extending from the front side 40 to the rear side 42, a notch side 48 that includes the notch portion 38, and a grip side 50 that includes the flanges 30.

[0037] According to an embodiment, the boot receiving space 32 is in the form of a recess that is sized and shaped to receive the second boot 16. The boot receiving space 32 is bound by walls on the rear side 42, the first lateral side 44, the second lateral side 46, and the notch side 48. In addition, the boot receiving space 32 is open on the front side 40 and the grip side 50.

[0038] According to an embodiment, the turbine component receiving space 34 is also open on the front side 40 and the grip side 50. In addition, the turbine component receiving space 34 is located within the boot receiving space 32. For example, the turbine component receiving space 34 is positioned in a central location within the boot receiving space 32. Alternatively, the turbine component receiving space 34 is positioned at a location that is offset from the central region of the boot receiving space 32.

[0039] In addition, according to an embodiment, the notch portion 38 extends through the boot receiving space 32 so that the boot receiving space 32 is divided into two portions. The notch portion 38 also extends through the turbine component receiving space 34 so that the turbine component receiving space 34 is divided into two portions. This allows the grit blast material to reach the target part of the turbine component 12 while the turbine component 12 is held within the boot assembly 10.

[0040] The wall on the rear side 42 of the boot receiving space 32 is contoured with projections and recesses. In most cases, there is a sharp transition from projection to recess. As will be shown later, the portion of the second boot 16 that engages the rear side of the boot receiving space 32 is also contoured. However, the contour of the second boot 16 is the opposite of the contour of the boot receiving space 32. In other words, the contours of the boot receiving space 32 and the second boot 16 are complementary to each other. The projections of the boot receiving space 32 have a similar shape as the recess in the first boot 14, and the recesses in the boot receiving space 32 in the first boot 14 have a similar shape as the projections on the second boot 16.

[0041] This configuration forms a lip 51 at the seams where the first and second boots 14, 16 meet. This removes any direct path to the turbine component 12 so that if any particle of the grit blast stream somehow infiltrates the boot assembly 10 at the seams or any other undesired location, the infiltrating particles are prevented from directly hitting the masked portions of the turbine component 12. The tortuous path to the turbine component 12 ensures that if any infiltrating particles do reach the turbine component 12, they will not have enough energy to impact or damage the surface of the turbine component 12.

[0042] The turbine component receiving space 34 is also contoured. However, the contour of the turbine component receiving space 34 is shaped to complement the contours of the turbine component 12 so that the turbine component 12 is immovable within the turbine component receiving space 34. For example, if the turbine component 12 is a vane or blade, the turbine component receiving space 34 has ridges that match the ridged "fir-tree" shape of the vane or blade root.

[0043] The wall on the notch side 48 of the boot receiving space 32 has an angled lip (or a chamfered portion) to form a channel 52 that extends from the first lateral side 44 to the second lateral side 46. The channel is only interrupted by the notch portion 38. The channel 52 receives a notch side 48 of the second boot 16. In addition, the depth d of the boot receiving space 32 is the same as the depth D of the second boot 16 so that when the second boot 16 is fully received in the boot receiving space 32, an exterior surface 54 of the second boot 16 is flush with the exterior surface on the front side 40 of the first boot 14.

[0044] However, the height h of the boot receiving space 32 is less than the height H of the second boot 16. This way the extended portion 26 of second boot 16 extends beyond the boot receiving space 32 when the second boot 16 is fully received by the first boot 14. It is contemplated an embodiment wherein the height h of the boot receiving space 32 is within a range of about 1.0 inches (2.54cm) to about 5 inches (12.7cm) (e.g., 1.917 inches (4.8692cm), 2 inches (5.08cm), 2.6675 inches (6.7744cm), or 3 inches (7.62cm)). According to an embodiment, it is contemplated that the height H of the second boot 16 is within a range of about 1.5 inches (3.81cm) to about 5 inches (12.7cm) (e.g., about 2.0 inches (5.08cm), about 2.4171 inches (6.1394cm), about 3 inches (7.62cm), about 3.1671 inches (8.0444cm), or about 4 inches (10.16cm)).

[0045] According to an embodiment, the securing mechanisms 36 is in the form of projections (e.g., ball locks) that extend from the wall on the rear side 42 of the first boot 14. The second boot 16, in another embodiment, includes receptacles positioned to receive the securing mechanisms 36 as the second boot 16 is pressed into the boot receiving space 32. The securing mechanisms 36 holds the first and second boots 14, 16 together by way of a friction fit with corresponding receptacle in the second boot 16. In order to separate the first and second boots 14, 16, the force pulling on the flange 30 and the extended portion 26 must be greater than the frictional force retaining the securing mechanisms 36 in the corresponding receptacles in the second boot 16.

[0046] Similar to the first boot 14, according to another embodiment, the second boot 16 has a front side 56, a rear side 58 opposite the front side 56, a first lateral side 60 extending from the front side 56 to the rear side 58, a second lateral side 62 extending from the front side 56 to the rear side 58, a notch side 64 that includes a notch portion 66, and a grip side 68 that includes the extended portion 26.

[0047] As can be seen in Figs. 14-20, in this example the notch side 64 of the second boot 16 is chamfered or angled to fit within the channel 52 in the first boot 14. The chamfered or angled shape of the notch side of the second boot 16 guides and aligns the second boot 16 with the first boot 14 when the second boot 16 is assembled to the first boot 14. Also, to some extent, the chamfered or angled shape of the notch side 64 of the second boot 16 keeps the first and second boots 14, 16 together prior to and while the securing mechanisms 36 of the first boot 14 engage the corresponding receptacles of the second boot 16.

[0048] As can be seen in Figs. 17-20 and as discussed above, the front side 56 of the second boot 16 is contoured to have projections and recesses match the shapes of the projections and recesses of the boot receiving space 34. Accordingly, when the second boot 16 is pressed into the boot receiving space 34 of the first boot 14, the projections and recesses reduce and even prevent particles from the grit blast stream infiltrating through the seams between the first and second boots 14, 16. In addition, any particles that infiltrate the first and second boots 14, 16 are prevented from directly hitting the masked portions of the turbine component 12. The tortuous path to the turbine component 12 ensures that if any infiltrating particles do reach the turbine component 12, they will not have enough energy to impact or damage the surface of the turbine component 12.

[0049] The front side 56 of the second boot 16 also includes a turbine component engaging portion 70. Similar to the turbine component receiving space 34 of the first boot 14, according to an embodiment, the turbine component engaging portion 70 is contoured to complement the contours of the turbine component 12 so that the turbine component 12. For example, if the turbine component 12 is a vane or blade, the turbine component engagement portion 70 has ridges that match the ridged "fir-tree" shape of the vane or blade root.

[0050] According to an embodiment, the turbine engagement portion 70 also includes a flange 72 that extends between the flanges 30 of the first boot 14 when the second boot 16 is secured to the first boot 14. Accordingly, the flange 72, according to another embodiment, covers the open side of the turbine component receiving space 34. The overlap created by the flange 72 also prevents particles from the grit blast stream infiltrating through the seams between the first and second boots 14, 16.

[0051] The front side 56 of the second boot 16 also includes the receptacles 74 that receive the securing mechanisms 36 of the first boot 14. Each receptacle is shaped to match the shape of the corresponding securing mechanism 36 on the first boot 14 so that the first and second boots 14, 16 can be secured together by way of an interference fit.

[0052] According to an embodiment, the first and second boots 14, 16 is formed from a resiliently flexible elastomeric material. In addition, the material from which the first and second boots 14, 16 are formed should be able to withstand the temperatures produced by the grit blasting process. For example, the first and second boots 14, 16 is made from silicone, hard rubber, polymers, composite materials (e.g., fiber-reinforced polymers), etc. It is contemplated that the material from which the first and second boots 14, 16 are made has a durometer between 70 and 90, preferably 90. In addition, according to an embodiment, the first and second boots 14, 16 are formed by way of a molding process and / or by way of an additive process.

[0053] In addition, it is contemplated that the width w 1 of the first boot 14 (which is also the width of the overall boot assembly 10) is within a range of about 2 inches (5.08cm) to about 6 inches (15.24cm). For example, the width w 1 is about 3 inches (7.62cm), about 3.75 inches (9.525cm), or about four inches (10.16cm). It is further contemplated that the height H 1 of the boot assembly 10 (which is the distance between the grip side 68 of the second boot 16 and the notch side 48 of the first boot 14) is within a range of about 1.5 inches (3.81cm) to 4 inches (10.16cm) (e.g., about 2 inches (5.08cm), about 2.6608 inches (6.7755cm), about 3 inches (7.62cm), about 3.108 inches (7.894cm)).

[0054] According to an embodiment, it is further contemplated that the width w 2 of the second boot 16 is the same as the width of the receiving space 32 of the first boot 14. According to an embodiment, the width w 2 is within a range of about 2.5 inches (6.35cm) and 4.0 inches (10.16cm). For example, in an embodiment the width w 2 is about 3.0 inches (7.62cm) or 3.75 inches (9.525cm).

[0055] In addition, according to an embodiment, when the second boot 16 is assembled to the first boot 14 (i.e., the second boot 16 is secured within the receiving space 32 of the first boot 14), the overall height of the boot assembly 10 (i.e., the distance from the extended portion 26 of the second boot 16 to the notch side 48 of the first boot 14) is within a range of about 2.0 inches (5.08cm) to about 5 inches (12.7cm) (e.g., about 2.0 inches (5.08cm), about 2.6608 inches (6.7755cm), about 3 inches (7.62cm), about 3.4108 inches (8.6634cm)).

[0056] In another embodiment, tt is contemplated that the locations of the securing mechanisms 36 and the receptacles 74 is swapped so that the securing mechanisms 36 project from the second boot 16 and the receptacles are in the first boot 14. All of the other projections and recesses in the first and second boots 14, 16 may also be swapped.

[0057] According to an embodiment, to assemble the boot assembly 10 with the turbine component 12, the turbine component 12 is first positioned in the turbine component receiving space 34 of the first boot 14. The second boot 16 is then be brought to the first boot 14 so that the front side 56 of the second boot 16 faces the boot receiving space 32 of the first boot 14. Next, the notch side 64 of the second boot 16 is positioned within the channel 52 in the first boot 14. As discussed above, this aligns the second boot 16 with the first boot 14. It also aligns the second boot 16 with the turbine component 12.

[0058] According to an embodiment, once the first and second boots 14, 16 are aligned, the second boot 16 is pressed against the first boot 14 so that the projections and recesses of the first and second boots 14, 16 engage each other. Also during the pressing action, the securing mechanisms 36 are inserted into the corresponding receptacles 74. During this insertion and during the engagement between the projections and receptacles, the silicone material may deform to create a seal between the engaging surfaces. It should be understood that the second boot 16 also engages the turbine component 12 when the second boot 16 is pressed against the first boot 14.

[0059] To release the second boot 16 from the first boot 14, the user grasps the gripping portion 24. For example, the user grasps the flanges 30 and the recess 28 in the extended portion 26 of the second boot 16. Once the gripping portion 24 is grasped, in an example, the user pulls the extended portion 26 away from the flanges 30 with enough force to overcome the frictional forces retaining the securing mechanisms 36 in the receptacles 74.

[0060] As can be seen from the assembly and disassembly processes above, the boot assembly 10 can be assembled and disassembled by the user simply using their hands. Accordingly, no tool is needed to assemble and disassemble the boot assembly 10.

[0061] While at least one exemplary embodiment of the present invention(s) is disclosed herein, it should be understood that modifications, substitutions and alternatives may be apparent to one of ordinary skill in the art and can be made without departing from the scope of this disclosure. This disclosure is intended to cover any adaptations or variations of the exemplary embodiment(s). In addition, in this disclosure, the terms "comprise" or "comprising" do not exclude other elements or steps, the terms "a" or "one" do not exclude a plural number, and the term "or" means either or both, unless this application states otherwise. Also, the terms "approximately", "about", and "substantially" encompass a range of plus or minus 15%. Furthermore, characteristics or steps which have been described may also be used in combination with other characteristics or steps and in any order unless the disclosure or context suggests otherwise.

Examples

Embodiment Construction

[0030]Figs. 1-7 illustrate an exemplary boot assembly 10 for masking a turbine component 12. Although the boot assembly 10 is illustrated as having two boots, the boot assembly 10 may have more than two boots (e.g., three, four, or more boots). According to an embodiment, the boot assembly 10 includes a first boot 14 and a second boot 16 nested within a receiving space of the first boot 14. The first and second boots 14, 16 are secured together by way of an interference fit. However, it is contemplated that there are other means (either as an alternative to or in addition to the interference fit) to secure the first boot 14 to the second boot 16. For example, the first and second boots 14, 16, according to an embodiment, are secured to each other by way of a snap fit connection, a dovetail connection, or other releasable mechanical fastener connection.

[0031]According to an embodiment, the boot assembly 10 includes a notch (or window or opening) 18 through which the turbine component...

TECHNICAL FIELD

[0001] The technology relates to masking devices used during the manufacturing or servicing of turbine components, such as blades or vanes for a gas turbine. In particular, the technology relates to a boot assembly that is affixed to the turbine component during a process to grit blast the component.BACKGROUND

[0002] Turbine components, such as a turbine blades (also referred to as airfoils) or vanes, in a gas turbine are typically subjected to stress from centrifugal force and fluid forces that can cause fracture, yielding, or creep failures. In addition, turbine components often endure temperatures around 2,500 °F (1,370 °C). Such high temperatures can weaken the turbine components and make them more susceptible to creep and corrosion failures. Also, vibrations from the turbine itself can cause fatigue failures.

[0003] One solution employed to improve the durability of and protect turbine components is to add a protective coating to component surfaces. In order to improve the bonding of the protective coating to the turbine component, the turbine component is initially subjected to a grit blast process.

[0004] In one treatment process, multiple turbine components are placed on a turn table and then each turbine component is subjected to a high-pressure stream of abrasive particles. While on the turn table, each turbine component is encased within a corresponding one-piece rubber molded boot that masks portions of the turbine component so that only the desired portion is grit blasted.

[0005] However, the one-piece molded boots are difficult to attach and remove from the turbine components. In addition, because of the difficulty of attaching and removing the one-piece molded boots, the turbine components are often damaged, scratched, or otherwise compromised during the attachment and removal processes.

[0006] Another process uses metal casted boots. However, the metal is too rigid and if not fit precisely results undesired portions of the turbine component being grit blasted.

[0007] A masking system is desired that better masks the turbine components without causing the damage discussed above.SUMMARY

[0008] Disclosed herein are a system and method that is applied to solve the problems discussed above.

[0009] In one aspect of the technology, a boot assembly configured to mask a portion of a turbine component, the boot assembly comprising: a first boot comprising a boot receiving area, a turbine component receiving area, and a notch that extends into the turbine component receiving area; and a second boot configured to be received within the boot receiving area of the first boot, the second boot comprising a boot engagement face, a turbine engagement portion, and a notch that extends into the turbine engagement portion, wherein the first and second boots are configured so that when assembled together, the notches of the first and second boots combine to form a continuous notch with an open end and a closed end, wherein the continuous notch is configured to expose both sides of the turbine component when the turbine component is masked by the boot assembly, and wherein a cross-sectional area of the continuous notch is larger toward the open end of the continuous notch than at the closed end of the continuous notch.

[0010] A further aspect of the technology includes the preceding aspect and wherein the first and second boots comprise projections and recesses that engage each other when the first and second boots are assembled to each other, and wherein when the projections and recesses engage each other, they form tortuous paths to the turbine component receiving area and turbine component engagement portion.

[0011] A further aspect of the technology includes any of the preceding aspects and wherein the first boot comprises an alignment receptacle configured to receive the second boot and align the second boot with the first boot while the second boot is being received in the alignment receptacle.

[0012] A further aspect of the technology includes any of the preceding aspects and wherein the alignment receptacle has an angled surface configured to retain the second boot to the first boot.

[0013] A further aspect of the technology includes any of the preceding aspects and wherein the first and second boots are configured to be assembled together and disassembled from each other without using tools.

[0014] A further aspect of the technology includes any of the preceding aspects and wherein the first and second boots are formed from silicone, hard rubber, polymers, or compound materials.

[0015] A further aspect of the technology includes any of the preceding aspects and further comprises a grip portion configured to be grasped and pulled apart to disassemble the first boot from the second boot.

[0016] A further aspect of the technology includes a boot assembly configured to mask a portion of a turbine component, the boot assembly comprising: a first boot comprising a turbine component receiving area and a notch that extends into the turbine component receiving area; a second boot configured to be received within the boot receiving area of the first boot, the second boot comprising a boot engagement face, a turbine engagement portion, and a notch that extends into the turbine engagement portion; and a securing mechanism configured to secure the first boot to the second boot by way of an interference connection, the securing mechanism comprising a projection and a receptacle configured to receive the projection, wherein the second boot is configured to be secured to the first boot be pressing the first boot against the second boot, wherein the first and second boots are configured so that when assembled together, the notches of the first and second boots combine to form a continuous notch with an open end and a closed end, and wherein a cross-sectional area of the continuous notch is larger toward the open end of the continuous notch than at the closed end of the continuous notch.

[0017] A further aspect of the technology includes the preceding aspect and wherein the first boot comprises an alignment receptacle configured to receive the second boot and align the second boot with the first boot while the second boot is being received in the alignment receptacle.

[0018] A further aspect of the technology includes any of the preceding aspects and wherein the alignment receptacle has an angled surface configured to retain the second boot to the first boot.

[0019] A further aspect of the technology includes any of the preceding aspects and wherein the first and second boots are configured to be assembled together and disassembled from each other without using tools.

[0020] A further aspect of the technology includes any of the preceding aspects and wherein the first and second boots are formed from silicone, hard rubber, polymers, or compound materials.

[0021] A further aspect of the technology includes any of the preceding aspects and further comprises a grip portion configured to be grasped and pulled apart to disassemble the first boot from the second boot.

[0022] A further aspect of the technology includes a boot assembly configured to mask a portion of a turbine component, the boot assembly comprising: a first boot comprising a boot receiving area, a turbine component receiving area, and a notch that extends into the turbine component receiving area; and a second boot configured to be nested within the boot receiving area of the first boot, the second boot comprising a boot engagement face, a turbine engagement portion, and a notch that extends into the turbine engagement portion, wherein a portion of the second boot extends beyond the first boot when the second boot is nested within the boot receiving area of the first boot and the extended portion of the second boot forms a gripping part configured to be grasped by a user to disassemble the second boot from the first boot, wherein the first and second boots are configured so that when assembled together, the notches of the first and second boots combine to form a continuous notch with an open end and a closed end, and wherein a cross-sectional area of the continuous notch is larger toward the open end of the continuous notch than at the closed end of the continuous notch.

[0023] A further aspect of the technology includes the previous aspect and wherein the first and second boots comprise projections and recesses that engage each other when the first and second boots are assembled to each other, and wherein when the projections and recesses engage each other, they form tortuous paths to the turbine component receiving area and turbine component engagement portion.

[0024] A further aspect of the technology includes any of the previous aspects and wherein the first boot comprises an alignment receptacle configured to receive the second boot and align the second boot with the first boot while the second boot is being received in the alignment receptacle.

[0025] A further aspect of the technology includes the previous aspect and wherein the alignment receptacle has an angled surface configured to retain the second boot to the first boot.

[0026] A further aspect of the technology includes the previous aspect and wherein the first and second boots are configured to be assembled together and disassembled from each other without using tools.

[0027] A further aspect of the technology includes the previous aspect and wherein the first and second boots are formed from silicone, hard rubber, polymers, or compound materials.

[0028] A further aspect of the technology includes the previous aspect and further comprises a grip portion configured to be grasped and pulled apart to disassemble the first boot from the second boot.BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Fig. 1 is an exploded view of a boot assembly. Fig. 2 is a perspective view of the boot assembly. Fig. 3 is another perspective view of the boot assembly. Fig. 4 is a side view of the boot assembly. Fig. 5 is another side view of the boot assembly. Fig. 6 is another perspective view of the boot assembly. Fig. 7 is another perspective view of the boot assembly. Fig. 8 is a perspective view of the first boot. Fig. 9 is another perspective view of the first boot. Fig. 10 is a side view of the first boot. Fig. 11 is another side view of the first boot. Fig. 12 is another perspective view of the first boot. Fig. 13 is another perspective view of the first boot. Fig. 14 is a perspective view of the second boot. Fig. 15 is another perspective view of the second boot. Fig. 16 is a side view of the second boot. Fig. 17 is another side view of the second boot. Fig. 18 is another perspective view of the second boot. Fig. 19 is another perspective view of the second boot. Fig. 20 is another perspective view of the second boot. DETAILED DESCRIPTION OF EXAMPLE NON-LIMITING EMBODIMENTS

[0030] Figs. 1-7 illustrate an exemplary boot assembly 10 for masking a turbine component 12. Although the boot assembly 10 is illustrated as having two boots, the boot assembly 10 may have more than two boots (e.g., three, four, or more boots). According to an embodiment, the boot assembly 10 includes a first boot 14 and a second boot 16 nested within a receiving space of the first boot 14. The first and second boots 14, 16 are secured together by way of an interference fit. However, it is contemplated that there are other means (either as an alternative to or in addition to the interference fit) to secure the first boot 14 to the second boot 16. For example, the first and second boots 14, 16, according to an embodiment, are secured to each other by way of a snap fit connection, a dovetail connection, or other releasable mechanical fastener connection.

[0031] According to an embodiment, the boot assembly 10 includes a notch (or window or opening) 18 through which the turbine component 12 is exposed when the turbine component 12 is contained within the boot assembly 10. In an embodiment, the notch 18 extends through both of the first and second boots 14, 16 so that both sides of the targeted portion of the turbine component 12 are exposed and visible.

[0032] The notch 18 has a closed end 20 and an open end 22. A cross-sectional area of the closed end 20 is smaller than a cross-sectional area of the open end 22. It is contemplated that when the turbine component 12 is contained within the boot assembly 10, the targeted portion of the turbine component 12 is located within the closed end 20 of the notch 18 but not in the open end 22. In this configuration, the width W of the notch 18 is less at the closed end 20 than at the open end 22. In addition, the width W of the notch 18, according to another example, is invariable at the closed end 20. In addition, at the open end 22, the width W of the notch 18 may increase in a direction away from the closed end 20 so that the width W of the notch 18 is greatest at the portion of the notch 18 furthest from the closed end 20. This configuration of the notch 18 minimizes or prevents the particles projected toward the turbine component 12 from being captured and remaining within the boot assembly 10.

[0033] The open end 22 of the notch 18, according to an embodiment, is located on a first side of the boot assembly 10, while a gripping portion 24 is located on a second side opposite the first side. The gripping portion 24 is used by the user to separate the first boot 14 from the second boot 16. The gripping portion 24 includes, for example, an extended portion 26 of the second boot 16 that extends beyond the first boot 14 when the second boot 16 is nested within the first boot 14. According to an embodiment, the extended portion 26 includes a recess 28 that is sized to receive a user's fingers. The drawings show the recess 28 facing toward the first boot 14. However, the recess 28 faces other directions as long as the recess 28 is accessible to the user.

[0034] According to an embodiment, the gripping portion 24 also includes one or more flanges 30 located on the second side of the boot assembly 10 opposite the first side. The flanges 30extends in a direction away from the first side of the boot assembly 10 (as shown in Figs. 1-13). However, it is contemplated that the flanges 30 may extend in any other direction as long as the flanges 30 are accessible by the user.

[0035] To disassemble the boot assembly 10 (i.e., separate the first boot 14 from the second boot 16), the user grips the extended portion 26 of the second boot 16 and grips the flanges 30 of the first boot 14. The user then pulls the flanges 30 and the extended portion 26 away from each other, which will in turn overcome the forces holding the first boot 14 to the second boot 16.

[0036] According to an embodiment, the first boot 14 supports the second boot 16 and the turbine component 12 and includes the one or more flanges 30, a boot receiving space 32, a turbine component receiving space 34, one or more securing mechanisms 36, and a notch portion 38. In addition, according to an embodiment, the first boot 14 has a front side 40, a rear side 42 opposite the front side 40, a first lateral side 44 extending from the front side 40 to the rear side 42, a second lateral side 46 extending from the front side 40 to the rear side 42, a notch side 48 that includes the notch portion 38, and a grip side 50 that includes the flanges 30.

[0037] According to an embodiment, the boot receiving space 32 is in the form of a recess that is sized and shaped to receive the second boot 16. The boot receiving space 32 is bound by walls on the rear side 42, the first lateral side 44, the second lateral side 46, and the notch side 48. In addition, the boot receiving space 32 is open on the front side 40 and the grip side 50.

[0038] According to an embodiment, the turbine component receiving space 34 is also open on the front side 40 and the grip side 50. In addition, the turbine component receiving space 34 is located within the boot receiving space 32. For example, the turbine component receiving space 34 is positioned in a central location within the boot receiving space 32. Alternatively, the turbine component receiving space 34 is positioned at a location that is offset from the central region of the boot receiving space 32.

[0039] In addition, according to an embodiment, the notch portion 38 extends through the boot receiving space 32 so that the boot receiving space 32 is divided into two portions. The notch portion 38 also extends through the turbine component receiving space 34 so that the turbine component receiving space 34 is divided into two portions. This allows the grit blast material to reach the target part of the turbine component 12 while the turbine component 12 is held within the boot assembly 10.

[0040] The wall on the rear side 42 of the boot receiving space 32 is contoured with projections and recesses. In most cases, there is a sharp transition from projection to recess. As will be shown later, the portion of the second boot 16 that engages the rear side of the boot receiving space 32 is also contoured. However, the contour of the second boot 16 is the opposite of the contour of the boot receiving space 32. In other words, the contours of the boot receiving space 32 and the second boot 16 are complementary to each other. The projections of the boot receiving space 32 have a similar shape as the recess in the first boot 14, and the recesses in the boot receiving space 32 in the first boot 14 have a similar shape as the projections on the second boot 16.

[0041] This configuration forms a lip 51 at the seams where the first and second boots 14, 16 meet. This removes any direct path to the turbine component 12 so that if any particle of the grit blast stream somehow infiltrates the boot assembly 10 at the seams or any other undesired location, the infiltrating particles are prevented from directly hitting the masked portions of the turbine component 12. The tortuous path to the turbine component 12 ensures that if any infiltrating particles do reach the turbine component 12, they will not have enough energy to impact or damage the surface of the turbine component 12.

[0042] The turbine component receiving space 34 is also contoured. However, the contour of the turbine component receiving space 34 is shaped to complement the contours of the turbine component 12 so that the turbine component 12 is immovable within the turbine component receiving space 34. For example, if the turbine component 12 is a vane or blade, the turbine component receiving space 34 has ridges that match the ridged "fir-tree" shape of the vane or blade root.

[0043] The wall on the notch side 48 of the boot receiving space 32 has an angled lip (or a chamfered portion) to form a channel 52 that extends from the first lateral side 44 to the second lateral side 46. The channel is only interrupted by the notch portion 38. The channel 52 receives a notch side 48 of the second boot 16. In addition, the depth d of the boot receiving space 32 is the same as the depth D of the second boot 16 so that when the second boot 16 is fully received in the boot receiving space 32, an exterior surface 54 of the second boot 16 is flush with the exterior surface on the front side 40 of the first boot 14.

[0044] However, the height h of the boot receiving space 32 is less than the height H of the second boot 16. This way the extended portion 26 of second boot 16 extends beyond the boot receiving space 32 when the second boot 16 is fully received by the first boot 14. It is contemplated an embodiment wherein the height h of the boot receiving space 32 is within a range of about 1.0 inches (2.54cm) to about 5 inches (12.7cm) (e.g., 1.917 inches (4.8692cm), 2 inches (5.08cm), 2.6675 inches (6.7744cm), or 3 inches (7.62cm)). According to an embodiment, it is contemplated that the height H of the second boot 16 is within a range of about 1.5 inches (3.81cm) to about 5 inches (12.7cm) (e.g., about 2.0 inches (5.08cm), about 2.4171 inches (6.1394cm), about 3 inches (7.62cm), about 3.1671 inches (8.0444cm), or about 4 inches (10.16cm)).

[0045] According to an embodiment, the securing mechanisms 36 is in the form of projections (e.g., ball locks) that extend from the wall on the rear side 42 of the first boot 14. The second boot 16, in another embodiment, includes receptacles positioned to receive the securing mechanisms 36 as the second boot 16 is pressed into the boot receiving space 32. The securing mechanisms 36 holds the first and second boots 14, 16 together by way of a friction fit with corresponding receptacle in the second boot 16. In order to separate the first and second boots 14, 16, the force pulling on the flange 30 and the extended portion 26 must be greater than the frictional force retaining the securing mechanisms 36 in the corresponding receptacles in the second boot 16.

[0046] Similar to the first boot 14, according to another embodiment, the second boot 16 has a front side 56, a rear side 58 opposite the front side 56, a first lateral side 60 extending from the front side 56 to the rear side 58, a second lateral side 62 extending from the front side 56 to the rear side 58, a notch side 64 that includes a notch portion 66, and a grip side 68 that includes the extended portion 26.

[0047] As can be seen in Figs. 14-20, in this example the notch side 64 of the second boot 16 is chamfered or angled to fit within the channel 52 in the first boot 14. The chamfered or angled shape of the notch side of the second boot 16 guides and aligns the second boot 16 with the first boot 14 when the second boot 16 is assembled to the first boot 14. Also, to some extent, the chamfered or angled shape of the notch side 64 of the second boot 16 keeps the first and second boots 14, 16 together prior to and while the securing mechanisms 36 of the first boot 14 engage the corresponding receptacles of the second boot 16.

[0048] As can be seen in Figs. 17-20 and as discussed above, the front side 56 of the second boot 16 is contoured to have projections and recesses match the shapes of the projections and recesses of the boot receiving space 34. Accordingly, when the second boot 16 is pressed into the boot receiving space 34 of the first boot 14, the projections and recesses reduce and even prevent particles from the grit blast stream infiltrating through the seams between the first and second boots 14, 16. In addition, any particles that infiltrate the first and second boots 14, 16 are prevented from directly hitting the masked portions of the turbine component 12. The tortuous path to the turbine component 12 ensures that if any infiltrating particles do reach the turbine component 12, they will not have enough energy to impact or damage the surface of the turbine component 12.

[0049] The front side 56 of the second boot 16 also includes a turbine component engaging portion 70. Similar to the turbine component receiving space 34 of the first boot 14, according to an embodiment, the turbine component engaging portion 70 is contoured to complement the contours of the turbine component 12 so that the turbine component 12. For example, if the turbine component 12 is a vane or blade, the turbine component engagement portion 70 has ridges that match the ridged "fir-tree" shape of the vane or blade root.

[0050] According to an embodiment, the turbine engagement portion 70 also includes a flange 72 that extends between the flanges 30 of the first boot 14 when the second boot 16 is secured to the first boot 14. Accordingly, the flange 72, according to another embodiment, covers the open side of the turbine component receiving space 34. The overlap created by the flange 72 also prevents particles from the grit blast stream infiltrating through the seams between the first and second boots 14, 16.

[0051] The front side 56 of the second boot 16 also includes the receptacles 74 that receive the securing mechanisms 36 of the first boot 14. Each receptacle is shaped to match the shape of the corresponding securing mechanism 36 on the first boot 14 so that the first and second boots 14, 16 can be secured together by way of an interference fit.

[0052] According to an embodiment, the first and second boots 14, 16 is formed from a resiliently flexible elastomeric material. In addition, the material from which the first and second boots 14, 16 are formed should be able to withstand the temperatures produced by the grit blasting process. For example, the first and second boots 14, 16 is made from silicone, hard rubber, polymers, composite materials (e.g., fiber-reinforced polymers), etc. It is contemplated that the material from which the first and second boots 14, 16 are made has a durometer between 70 and 90, preferably 90. In addition, according to an embodiment, the first and second boots 14, 16 are formed by way of a molding process and / or by way of an additive process.

[0053] In addition, it is contemplated that the width w 1 of the first boot 14 (which is also the width of the overall boot assembly 10) is within a range of about 2 inches (5.08cm) to about 6 inches (15.24cm). For example, the width w 1 is about 3 inches (7.62cm), about 3.75 inches (9.525cm), or about four inches (10.16cm). It is further contemplated that the height H 1 of the boot assembly 10 (which is the distance between the grip side 68 of the second boot 16 and the notch side 48 of the first boot 14) is within a range of about 1.5 inches (3.81cm) to 4 inches (10.16cm) (e.g., about 2 inches (5.08cm), about 2.6608 inches (6.7755cm), about 3 inches (7.62cm), about 3.108 inches (7.894cm)).

[0054] According to an embodiment, it is further contemplated that the width w 2 of the second boot 16 is the same as the width of the receiving space 32 of the first boot 14. According to an embodiment, the width w 2 is within a range of about 2.5 inches (6.35cm) and 4.0 inches (10.16cm). For example, in an embodiment the width w 2 is about 3.0 inches (7.62cm) or 3.75 inches (9.525cm).

[0055] In addition, according to an embodiment, when the second boot 16 is assembled to the first boot 14 (i.e., the second boot 16 is secured within the receiving space 32 of the first boot 14), the overall height of the boot assembly 10 (i.e., the distance from the extended portion 26 of the second boot 16 to the notch side 48 of the first boot 14) is within a range of about 2.0 inches (5.08cm) to about 5 inches (12.7cm) (e.g., about 2.0 inches (5.08cm), about 2.6608 inches (6.7755cm), about 3 inches (7.62cm), about 3.4108 inches (8.6634cm)).

[0056] In another embodiment, tt is contemplated that the locations of the securing mechanisms 36 and the receptacles 74 is swapped so that the securing mechanisms 36 project from the second boot 16 and the receptacles are in the first boot 14. All of the other projections and recesses in the first and second boots 14, 16 may also be swapped.

[0057] According to an embodiment, to assemble the boot assembly 10 with the turbine component 12, the turbine component 12 is first positioned in the turbine component receiving space 34 of the first boot 14. The second boot 16 is then be brought to the first boot 14 so that the front side 56 of the second boot 16 faces the boot receiving space 32 of the first boot 14. Next, the notch side 64 of the second boot 16 is positioned within the channel 52 in the first boot 14. As discussed above, this aligns the second boot 16 with the first boot 14. It also aligns the second boot 16 with the turbine component 12.

[0058] According to an embodiment, once the first and second boots 14, 16 are aligned, the second boot 16 is pressed against the first boot 14 so that the projections and recesses of the first and second boots 14, 16 engage each other. Also during the pressing action, the securing mechanisms 36 are inserted into the corresponding receptacles 74. During this insertion and during the engagement between the projections and receptacles, the silicone material may deform to create a seal between the engaging surfaces. It should be understood that the second boot 16 also engages the turbine component 12 when the second boot 16 is pressed against the first boot 14.

[0059] To release the second boot 16 from the first boot 14, the user grasps the gripping portion 24. For example, the user grasps the flanges 30 and the recess 28 in the extended portion 26 of the second boot 16. Once the gripping portion 24 is grasped, in an example, the user pulls the extended portion 26 away from the flanges 30 with enough force to overcome the frictional forces retaining the securing mechanisms 36 in the receptacles 74.

[0060] As can be seen from the assembly and disassembly processes above, the boot assembly 10 can be assembled and disassembled by the user simply using their hands. Accordingly, no tool is needed to assemble and disassemble the boot assembly 10.

[0061] While at least one exemplary embodiment of the present invention(s) is disclosed herein, it should be understood that modifications, substitutions and alternatives may be apparent to one of ordinary skill in the art and can be made without departing from the scope of this disclosure. This disclosure is intended to cover any adaptations or variations of the exemplary embodiment(s). In addition, in this disclosure, the terms "comprise" or "comprising" do not exclude other elements or steps, the terms "a" or "one" do not exclude a plural number, and the term "or" means either or both, unless this application states otherwise. Also, the terms "approximately", "about", and "substantially" encompass a range of plus or minus 15%. Furthermore, characteristics or steps which have been described may also be used in combination with other characteristics or steps and in any order unless the disclosure or context suggests otherwise.

Examples

Embodiment Construction

[0030]Figs. 1-7 illustrate an exemplary boot assembly 10 for masking a turbine component 12. Although the boot assembly 10 is illustrated as having two boots, the boot assembly 10 may have more than two boots (e.g., three, four, or more boots). According to an embodiment, the boot assembly 10 includes a first boot 14 and a second boot 16 nested within a receiving space of the first boot 14. The first and second boots 14, 16 are secured together by way of an interference fit. However, it is contemplated that there are other means (either as an alternative to or in addition to the interference fit) to secure the first boot 14 to the second boot 16. For example, the first and second boots 14, 16, according to an embodiment, are secured to each other by way of a snap fit connection, a dovetail connection, or other releasable mechanical fastener connection.

[0031]According to an embodiment, the boot assembly 10 includes a notch (or window or opening) 18 through which the turbine component...

Claims

1. A boot assembly (10) configured to mask a portion of a turbine component (12), the boot assembly (10) comprising: a first boot (14) comprising a boot receiving area (32), a turbine component receiving area (34), and a notch (38) that extends into the turbine component receiving area (34); and a second boot (16) configured to be received within the boot receiving area (32) of the first boot (14), the second boot (18) comprising a boot engagement face (56), a turbine engagement portion (70), and a notch (66) that extends into the turbine engagement portion (70), wherein the first and second boots (14, 16) are configured so that when assembled together, the notches (38, 66) of the first and second boots (14, 16) combine to form a continuous notch with an open end and a closed end, wherein the continuous notch is configured to expose both sides of the turbine component (12) when the turbine component (12) is masked by the boot assembly (10), and wherein a cross-sectional area of the continuous notch is larger toward the open end of the continuous notch than at the closed end of the continuous notch.

2. The boot assembly (10) of claim 1, wherein the first and second boots (14, 16) comprise projections and recesses that engage each other when the first and second boots (14, 16) are assembled to each other, and wherein when the projections and recesses engage each other, they form tortuous paths to the turbine component receiving area (34) and turbine component engagement portion (70).

3. The boot assembly (10) of any one of claims 1 to 2, wherein the first boot (14) comprises an alignment receptacle configured to receive the second boot (16) and align the second boot (16) with the first boot (14) while the second boot (16) is being received in the alignment receptacle.

4. The boot assembly (10) of claim 3, wherein the alignment receptacle has an angled surface configured to retain the second boot (16) to the first boot (14).

5. The boot assembly (10) of any one of claims 1 to 4, wherein the first and second boots (14, 16) are configured for toolless assembly and disassembly.

6. The boot assembly (10) of any one of claims 1 to 5, wherein the first and second boots (14, 16) are formed from silicone, hard rubber, polymers, or composite materials.

7. The boot assembly (10) of any one of claims 1 to 6, further comprising a grip portion (24) configured to be grasped and pulled apart to disassemble the first boot (14) from the second boot (16).

8. The boot assembly (10) of any one of claims 1 to 7, further comprising: a securing mechanism configured to secure the first boot (14) to the second boot (16) by way of an interference connection, the securing mechanism comprising a projection and a receptacle configured to receive the projection.

9. The boot assembly (10) of any one of claims 1 to 8, wherein the second boot (16) is configured to be secured to the first boot (14) by pressing the first boot (14) against the second boot (16).

10. The boot assembly (10) of any one of claims 1 to 9, wherein a portion of the second boot (16) extends beyond the first boot (14) when the second boot (16) is nested within the boot receiving area of the first boot (14).

11. The boot assembly (10) of claim 10, wherein the extended portion of the second boot (16) forms a gripping part (24) configured to be grasped by a user to disassemble the second boot (16) from the first boot (14).

Images