Turbomachine sealing device and method
阅读说明:本技术 涡轮机械密封装置和方法 (Turbomachine sealing device and method ) 是由 赖安·克里斯托弗·琼斯 丹尼尔·恩迪科特·奥斯古德 扎迦利·丹尼尔·韦伯斯特 格雷戈里·T·加 于 2019-07-30 设计创作,主要内容包括:一种涡轮机械密封装置,包括具有第一端面的第一涡轮机械部件和远离第一端面延伸的密封件,该密封件通过在部件的壁和密封件之间延伸的接片连接到该壁。(A turbomachinery sealing device includes a first turbomachinery component having a first end face and a seal extending away from the first end face, the seal being connected to a wall of the component by a tab extending between the wall and the seal.)
1. A turbomachine sealing device comprising a first turbomachine component having a first end face, and a seal extending away from the first end face, the seal being connected to a wall of the component by a tab extending between the wall and the seal.
2. The apparatus of claim 1, wherein the wall defines a portion of a first seal groove in communication with the first end face, and a portion of the seal is received in the first seal groove.
3. The apparatus of claim 2, further comprising a second turbomachine component disposed adjacent the first turbomachine component, the second turbomachine component having a second end face and a second seal groove formed in the second end face, wherein a portion of the seal extends into the second seal groove to seal a gap between the first end face and the second end face when the first turbomachine component and the second turbomachine component are disposed adjacent to each other.
4. The device of claim 1, wherein the seal, tab and wall form a unitary structure.
5. The device of claim 1, wherein the seal extends away from the first end face at an oblique angle.
6. The device of claim 1, wherein the tab has a thickness less than a thickness of the seal.
7. The apparatus of claim 1, wherein the seal includes a metering hole formed therethrough.
8. The apparatus of claim 2, wherein the first turbomachine component comprises a second end face opposite the first end face, the second end face comprising a second seal groove.
9. A turbomachine sealing device comprising a plurality of first turbomachine components as recited in claim 8, arranged in a ring, wherein the first end face of each of the first turbomachine components is disposed adjacent the second end face of an adjacent one of the first turbomachine components such that a portion of the seal in each of the first turbomachine components extends into the second seal groove of one of the first turbomachine components, thereby sealing a gap between adjacent ones of the plurality of first turbomachine components.
10. A method of assembling a turbomachine sealing device, comprising the steps of:
providing a first turbomachine component having a seal connected thereto by a tab;
providing a second turbomachine component; and
positioning the first and second turbomachine components adjacent to each other such that the seal spans a gap between the two turbomachine components.
Technical Field
The present invention relates generally to sealing leak paths in engines. More particularly, the present invention relates to seals, such as spline seals, used in leakage paths of turbine hardware or other hardware, where the seals are used to seal leakage between components.
Background
Stationary and rotating turbine engine components, such as turbine stators or nozzles, buckets, bucket shrouds and combustors, are typically constructed as a ring of side-by-side segments. It is known that leakage at the gaps between adjacent sections results in inefficiencies in aircraft engines. Therefore, air leakage between adjacent sections must be minimized to meet engine performance requirements. This is typically achieved using a spline seal, which is a small metal strip that is received in seal grooves formed in two adjacent segments, bridging the gap between the two adjacent segments. Each groove formed in an adjacent segment receives one half of a spline seal.
In conventional seal assemblies, sealing the leak paths requires cumbersome assembly and, because of the assembly of multiple modules, numerous seals must be carefully inserted to seal each leak path, potentially resulting in misplacement and/or improper installation of the seals. For example, in a ring of turbine blades or a ring of stationary turbine nozzles or a ring of turbine shrouds, there may be 30 to 70 joint lines, each of which requires a seal. Assembling all seals is complicated and time consuming.
Disclosure of Invention
At least one of the above problems is addressed by a seal manufactured using casting and/or other manufacturing methods that allow the seal to be connected and/or integrally formed with an adjacent one of the segments and to remain in place during assembly of the adjacent segments, thereby preventing misplacement and/or incorrect installation of the seal.
According to one aspect of the technology described herein, a turbomachinery sealing device includes a first turbomachinery component having a first end surface and a seal extending from the first end surface, the seal being connected to a wall of the component by a tab extending between the wall and the seal.
According to another aspect of the technology described herein, a method of assembling a turbomachine sealing device includes the steps of: providing a first turbomachine component having a seal connected thereto by a tab; providing a second turbomachine component; the first and second turbomachine components are positioned adjacent to each other such that the seal spans a gap between the two turbomachine components.
According to another aspect of the technology described herein, a method of assembling a turbomachine component includes the steps of: providing a plurality of turbomachine segments, each of the plurality of turbomachine segments having a first end face and a second end face opposite the first end face, the first end face including a first seal groove, the second end face including a second seal groove, the first seal groove having a seal disposed therein, the seal connected to a wall of the first seal groove by a tab extending between the wall of the first seal groove and the seal; and providing a plurality of turbomachine segments having first end faces adjacent to second end faces of adjacent turbomachine segments such that a portion of a respective seal extends into the second seal groove.
Drawings
The invention may best be understood by reference to the following description taken in conjunction with the accompanying drawings in which:
FIG. 1 is a perspective view of two nozzle segments assembled together;
FIG. 2 is an exploded perspective view of FIG. 1 showing a spline seal and seal groove for sealing the leakage path of the assembled nozzle segment;
FIG. 3 is a cross-sectional view of FIG. 1 illustrating a prior art method of assembling two nozzle segments;
FIG. 4 is a cross-sectional view illustrating an exemplary method of assembling a plurality of nozzle segments;
FIG. 5 illustrates a seal installed in a seal groove of an adjacent nozzle segment assembled by the method of FIG. 4, wherein the seal is separated from the seal groove after assembly;
FIG. 6 illustrates a seal installed in a seal slot of adjacent nozzle segments after assembly by the method of FIG. 4, wherein the seal remains connected to one of the seal slots;
FIG. 7 illustrates a seal installed in the seal slots of adjacent nozzle segments after assembly by the method of FIG. 4, wherein the seal remains attached to one of the seal slots and contains at least one hole;
FIG. 8 is an exploded schematic view showing an alternative seal embodiment in which a component has a seal extending from opposite faces thereof; and
fig. 9 is an assembled view of the components of fig. 8.
Detailed Description
Referring to the drawings, wherein like reference numbers refer to like elements throughout the several views, FIG. 1 depicts two exemplary
The
Referring now to fig. 2-6, each
The
Likewise, the
The
As shown in fig. 3, the prior art assembly method requires insertion of the
Note that the region generally labeled "P1" is part of the secondary flowpath, i.e., it is located on the "cold side" of the hardware. The region labeled "P2" is part of the primary flow path, i.e., the "hot side" of the hardware where the hot combustion gases flow. The
Referring to fig. 4-6, the present concept uses manufacturing techniques such as investment casting, additive manufacturing, and Electrical Discharge Machining (EDM) to form the
As shown, the
The tabs or
In another example, as shown in fig. 6, the tabs or
A variety of physical configurations of the above-described seal structures are possible. For example, fig. 8 and 9 illustrate an
The
The
The embodiments of fig. 8 and 9 illustrate the following concepts: the seal connected by the tabs as described above may extend from the face of one component and be fully received in the groove of the meeting component; or, in other words, not every component need include a seal groove. This embodiment further illustrates the concept of: a given component may have two or more seals extending from opposite sides thereof that are received in the grooves of two adjacent components. Providing a seal that extends at an oblique angle allows for physical assembly of generally angled or arcuate structures from these components.
The current technology provides the benefits of eliminating the assembly steps, simplifying the overall assembly process and allowing for tightly controlled manufacturing tolerances to introduce better sealing effectiveness and drive airflow away from potential leakage paths; thus, performance is improved.
The foregoing has described a turbomachine apparatus and method. All of the features disclosed in this specification (including any accompanying claims, abstract and drawings), and/or all of the steps of any method or process so disclosed, may be combined in any combination, except combinations where some of such features and/or steps are mutually exclusive.
Each feature disclosed in this specification (including any accompanying claims, abstract and drawings), may be replaced by alternative features serving the same, equivalent or similar purpose, unless expressly stated otherwise. Thus, unless expressly stated otherwise, each feature disclosed is one example only of a generic series of equivalent or similar features.
The invention is not restricted to the details of the foregoing embodiments. The invention extends to any novel one, or any novel combination, of the features disclosed in this specification (including any accompanying claims, abstract and drawings), or to any novel one, or any novel combination, of the steps of any method or process so disclosed.
Further aspects of the invention are provided by the subject matter of the following clauses:
1. a turbomachinery sealing device comprising a first turbomachinery component having a first end face, and a seal extending away from the first end face, the seal being connected to a wall of the component by a tab extending between the wall and the seal.
2. The apparatus of any preceding claim, wherein the wall defines a portion of a first seal groove in communication with the first end face, and a portion of the seal is received in the first seal groove.
3. The apparatus of any preceding claim, further comprising a second turbomachine component disposed adjacent the first turbomachine component, the second turbomachine component having a second end face and a second seal groove formed in the second end face, wherein a portion of the seal extends into the second seal groove to seal a gap between the first end face and the second end face when the first turbomachine component and the second turbomachine component are disposed adjacent to each other.
4. The device according to any preceding claim, wherein the seal, tab and wall form a unitary structure.
5. The apparatus of any preceding claim, wherein the seal extends away from the first end face at an oblique angle.
6. The device according to any preceding claim, wherein the tab has a thickness less than a thickness of the seal.
7. The apparatus according to any preceding claim, wherein the seal comprises a metering hole formed therethrough.
8. The apparatus of any preceding claim, wherein the first turbomachine component comprises a second end face opposite the first end face, the second end face comprising a second seal groove.
9. A turbomachinery sealing device comprising a plurality of first turbomachinery components of any of the preceding items arranged in a ring, wherein said first end face of each said first turbomachinery component is disposed adjacent to said second end face of an adjacent one of said first turbomachinery components such that a portion of said seal in each said first turbomachinery component extends into said second seal groove of one of said first turbomachinery components, thereby sealing a gap between adjacent ones of said first turbomachinery components.
10. A method of assembling a turbomachine sealing device, comprising the steps of: providing a first turbomachine component having a seal connected thereto by a tab; providing a second turbomachine component; and positioning the first and second turbomachine components adjacent to each other such that the seal spans a gap between the two turbomachine components.
11. The method according to any preceding item, wherein the seal, tab and first turbomachine component form a unitary structure.
12. The method according to any preceding item, further comprising the step of breaking the tab after positioning the first and second turbomachine components.
13. The method of any preceding item, the first segment comprising a first end face having a first seal groove formed therein.
14. The method of any preceding claim, wherein the seal is disposed within the first seal groove and is connected to a wall of the first seal groove by the tab.
15. The method of any preceding item, wherein the second segment includes a second end face having a second seal groove formed therein.
16. The method of any preceding item, further comprising the step of positioning the first end face adjacent the second end face to allow a portion of the seal to be positioned in the second seal groove.
17. The method according to any preceding claim, wherein the seal comprises a metering hole.
18. A method of assembling a turbomachine component comprising the steps of: providing a plurality of turbomachine segments, each of the plurality of turbomachine segments having a first end face and a second end face opposite the first end face, the first end face including a first seal groove, the second end face including a second seal groove, the first seal groove having a seal disposed therein, the seal connected to a wall of the first seal groove by a tab extending between the wall and the seal; and disposing the plurality of turbomachine segments such that a first end face of one turbomachine segment is adjacent to a second end face of an adjacent turbomachine segment such that a portion of a respective seal extends into the second seal groove.
19. The method according to any preceding item, further comprising the step of breaking the tabs after positioning the plurality of turbomachine segments together.
20. The method according to any preceding item, wherein the seal, tab and turbomachine section form a unitary structure.
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