Turbine outer ring sealing assembly, turbine outer ring and aero engine

Abstract

This invention discloses a sealing assembly for a turbine outer ring, a turbine outer ring, and an aero-engine. The sealing assembly includes: a sealing base plate, which is erected between a CMC outer ring assembly and a metal outer ring assembly. The end face of the CMC outer ring assembly has a first sealing groove, and the end face of the metal outer ring assembly has a second sealing groove; a first sealing rib and a second sealing rib, which are respectively disposed on two sides of the sealing base plate and extend from the two sides of the sealing base plate in opposite directions. The first sealing rib is inserted into the first sealing groove, and the second sealing rib is inserted into the second sealing groove. The first and second sealing ribs have different structures. When faced with the problem of different structural characteristics of the end faces of the CMC outer ring assembly and the metal outer ring assembly, the use of two different structures of the first and second sealing ribs achieves separate sealing of sealing grooves of different shapes, thereby preventing leakage.

Description

Technical Field

[0001] This invention relates to the field of aero-engine technology, specifically to a sealing assembly for a turbine outer ring, a turbine outer ring, and an aero-engine. Background Technology

[0002] The turbine is one of the main components of an aero-engine. The turbine outer ring is a ring structure formed by multiple blocks. Due to the good mechanical properties of ceramic matrix composites (CMCs) at high temperatures, CMC hot-end components for aero-engines have been increasingly researched and engineered, such as CMC turbine outer ring assemblies. This involves partially replacing existing multi-block metal outer ring assemblies with CMC outer ring assemblies.

[0003] Gaps can exist between the end faces of the CMC outer ring assembly and the metal outer ring assembly, leading to leakage. Therefore, minimizing these gaps and reducing leakage is a crucial aspect of the structural design. Furthermore, due to the different end face structures of the CMC and metal outer ring assemblies, a sealing device is needed to seal each assembly separately, taking into account their unique characteristics. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the defect that leakage can occur due to the gap between the end face of the CMC turbine outer ring assembly and the metal turbine outer ring assembly in the prior art, and to provide a sealing assembly for the turbine outer ring, the turbine outer ring, and an aero-engine.

[0005] The present invention solves the above-mentioned technical problems through the following technical solution:

[0006] A sealing assembly for a turbine outer ring, the sealing assembly comprising:

[0007] A sealing base plate is erected between the CMC outer ring assembly and the metal outer ring assembly. The end face of the CMC outer ring assembly is provided with a first sealing groove, and the end face of the metal outer ring assembly is provided with a second sealing groove.

[0008] A first sealing rib and a second sealing rib are respectively disposed on the two sides of the sealing base plate and extend from the two sides of the sealing base plate in opposite directions. The first sealing rib is inserted into the first sealing groove and the second sealing rib is inserted into the second sealing groove. The first sealing rib and the second sealing rib have different structures.

[0009] In this solution, first and second sealing ribs, located on both sides of the sealing base plate, are inserted into first and second sealing grooves to seal the gap between the CMC outer ring assembly and the end face of the metal outer ring assembly, thus preventing leakage. Furthermore, when faced with the challenges of different structural characteristics of the end faces of the CMC outer ring assembly and the metal outer ring assembly, as well as the different shapes of the first and second sealing grooves, the use of two different structures of first and second sealing ribs allows for separate sealing of the sealing grooves with different shapes. On the other hand, the sealing base plate cleverly integrates the two structures of sealing ribs, which are conveniently located on both sides, reducing the size of the sealing assembly.

[0010] Preferably, the sealing base plate has a separate upper base plate and a lower base plate, which can be assembled together.

[0011] In this solution, the above structure is adopted to avoid thermal deformation between the outer ring and the casing, which could cause damage to the sealing assembly under load, and to increase the service life of the sealing base plate.

[0012] Preferably, the shape of the upper end face of the lower base plate is adapted to the shape of the lower end face of the upper base plate.

[0013] In this solution, the above structure is adopted to avoid mutual interference between the upper and lower end faces when assembling the upper and lower base plates, making assembly more convenient and allowing for more rational use of space.

[0014] Preferably, the upper base plate includes a first horizontal plate arranged horizontally and a first vertical plate arranged vertically at both ends of the first horizontal plate. The first vertical plate extends vertically downward from the end of the first horizontal plate and fits against the end face of the lower base plate.

[0015] Preferably, at least one end of the first horizontal plate is in surface contact with the first vertical plate.

[0016] In this design, the above structure is adopted, which improves the structural strength of the upper base plate and avoids bending of the first horizontal plate.

[0017] Preferably, the first sealing rib includes a first protrusion and a second protrusion, the first protrusion extending downward from the top of the sealing base plate and the second protrusion extending upward from the bottom of the sealing base plate. The CMC outer ring assembly includes a CMC outer ring and a first housing, both the CMC outer ring and the first housing being provided with the first sealing groove. The first protrusion and the second protrusion are respectively inserted into the first sealing groove of the first housing and the CMC outer ring.

[0018] In this solution, the above structure is adopted, thereby achieving double-layer sealing by utilizing the first protrusion and the second protrusion, resulting in a better sealing effect.

[0019] Preferably, the first protrusion includes a second horizontal plate and a second vertical plate, the second vertical plate extending downward from both ends of the sealing bottom plate, and the two ends of the second horizontal plate being connected to the top ends of the second vertical plate respectively.

[0020] Preferably, the second protrusion includes a third vertical plate extending upward from the bottom of the sealing base plate, and the third vertical plate is located inside the second vertical plate.

[0021] Preferably, the second sealing rib includes a third protrusion and a fourth protrusion, the third protrusion extending downward from the top of the sealing base plate and the fourth protrusion extending upward from the bottom of the sealing base plate. The metal outer ring assembly includes a metal outer ring and a second housing, both of which are provided with the second sealing groove. The third protrusion and the fourth protrusion are respectively inserted into the second sealing groove of the second housing and the metal outer ring.

[0022] In this solution, the above structure is adopted, thereby achieving double-layer sealing by utilizing the third and fourth protrusions, resulting in a better sealing effect.

[0023] Preferably, the third protrusion includes a first inclined plate and two vertically extending fourth vertical plates, one side of each of the two fourth vertical plates is in contact with the side of the sealing base plate, and one of the fourth vertical plates extends out of the top surface of the sealing base plate, with the two ends of the first inclined plate respectively connected to the two fourth vertical plates.

[0024] Preferably, the fourth protrusion includes a second inclined plate extending obliquely upward from the bottom of the sealing base plate, a horizontal plate extending horizontally from the top of the second inclined plate, and a third inclined plate extending obliquely upward from the bottom of the second inclined plate.

[0025] Preferably, the sealing base plate further includes a connecting hole for connecting the CMC outer ring assembly and the metal outer ring assembly.

[0026] In this solution, the above structure is used, and the connecting hole can be used to connect the cold air cavity of the CMC outer ring assembly and the metal outer ring assembly.

[0027] A turbine outer ring, the turbine outer ring comprising a CMC outer ring assembly, a metal outer ring assembly, and a sealing assembly for the turbine outer ring as described in any one of the above.

[0028] In this solution, the above structure is used to seal the gaps between the sections of the turbine outer ring, thus preventing leakage; it also enables separate sealing of the CMC outer ring assembly and the metal outer ring assembly end face structures under different conditions.

[0029] An aircraft engine comprising the turbine outer ring described above.

[0030] In this solution, the aero-engine can use the CMC outer ring assembly to replace part of the metal outer ring assembly, thereby improving performance without causing leakage problems.

[0031] The positive and progressive effects of this invention are as follows:

[0032] This invention seals the gap between the CMC outer ring assembly and the metal outer ring assembly end faces by inserting first and second sealing ribs, which are located on both sides of the sealing base plate, into first and second sealing grooves, thereby preventing leakage. When faced with the problem of different end face structures of the CMC outer ring assembly and the metal outer ring assembly, as well as different shapes of the first and second sealing grooves, this invention utilizes two different structures of first and second sealing ribs to seal the sealing grooves of different shapes separately, overcoming the inability to seal due to the different end face structures of the CMC outer ring assembly and the metal outer ring assembly. Furthermore, the sealing base plate cleverly integrates the two structures of sealing ribs, which are conveniently located on both sides, reducing the size of the sealing assembly. Attached Figure Description

[0033] Figure 1 This is an exploded structural diagram of the sealing assembly of the turbine outer ring according to Embodiment 1 of the present invention;

[0034] Figure 2 for Figure 1 A schematic diagram of the decomposed structure from another perspective;

[0035] Figure 3 for Figure 1 A schematic diagram of the side view structure;

[0036] Figure 4 for Figure 3 Schematic diagram of the structure of the middle BB section;

[0037] Figure 5 for Figure 3 Schematic diagram of the structure of the DD section;

[0038] Figure 6 for Figure 3 Schematic diagram of the CC section;

[0039] Figure 7This is a schematic diagram of the CMC outer ring assembly of Embodiment 1 of the present invention;

[0040] Figure 8 This is a schematic diagram of the metal outer ring assembly of Embodiment 1 of the present invention;

[0041] Figure 9 This is a schematic diagram of the assembly state of the sealing assembly and the CMC outer ring assembly in Embodiment 1 of the present invention;

[0042] Figure 10 This is a schematic diagram of the assembly state of the sealing component and the metal outer ring component in Embodiment 2 of the present invention.

[0043] Explanation of reference numerals in the attached figures

[0044] Sealing component 100

[0045] Sealing the bottom plate 1

[0046] Upper base plate 11

[0047] First horizontal board 111

[0048] First vertical board 112

[0049] Bottom plate 12

[0050] Connecting hole 13

[0051] CMC outer ring component 2

[0052] First sealing groove 21

[0053] CMC Outer Ring 22

[0054] First Casing 23

[0055] Metal outer ring assembly 3

[0056] Second sealing groove 31

[0057] Metal outer ring 32

[0058] Second Casing 33

[0059] First sealing rib 4

[0060] First protrusion 41

[0061] Second horizontal board 411

[0062] Second vertical board 412

[0063] Second protrusion 42

[0064] Third vertical board 421

[0065] Second sealing rib 5

[0066] Third protrusion 51

[0067] First inclined plate 511

[0068] Fourth vertical board 512

[0069] Fourth protrusion 52

[0070] Second inclined plate 521

[0071] Horizontal plate 522

[0072] Third inclined plate 523 Detailed Implementation

[0073] The present invention will be further illustrated by way of embodiments below, but the present invention is not limited to the scope of the embodiments.

[0074] Example 1

[0075] like Figures 1-9 As shown, this embodiment discloses a sealing assembly 100 for a turbine outer ring. The sealing assembly 100 includes: a sealing base plate 1, which is erected between a CMC outer ring assembly 2 and a metal outer ring assembly 3. The end face of the CMC outer ring assembly 2 is provided with a first sealing groove 21, and the end face of the metal outer ring assembly 3 is provided with a second sealing groove 31; a first sealing rib 4 and a second sealing rib 5, which are respectively provided on the two sides of the sealing base plate 1 and extend from the two sides of the sealing base plate 1 in opposite directions. The first sealing rib 4 is inserted into the first sealing groove 21, and the second sealing rib 5 is inserted into the second sealing groove 31. The structures of the first sealing rib 4 and the second sealing rib 5 are different.

[0076] By placing the sealing base plate 1 between the end faces of the CMC outer ring assembly 2 and the metal outer ring assembly 3, with the length direction of the sealing base plate 1 parallel to the end faces of the CMC outer ring assembly 2 and the metal outer ring assembly 3, and then inserting the first sealing rib plate 4 and the second sealing rib plate 5 provided on both sides of the sealing base plate 1 into the first sealing groove 21 and the second sealing groove 31, the gap between the end faces of the CMC outer ring assembly 2 and the metal outer ring assembly 3 is sealed, thereby preventing leakage.

[0077] Furthermore, when faced with the different structural characteristics of the end faces of the CMC outer ring assembly 2 and the metal outer ring assembly 3, as well as the different shapes of the first sealing groove 21 and the second sealing groove 31, the use of two different structures of the first sealing rib 4 and the second sealing rib 5 enables separate sealing of sealing grooves of different shapes, overcoming the situation where sealing is impossible due to the different end face structures of the CMC outer ring assembly 2 and the metal outer ring assembly 3. On the other hand, the sealing base plate 1 cleverly integrates the two structures of sealing ribs, which are convenient to set with the first sealing rib 4 and the second sealing rib 5 on both sides, reducing the volume of the sealing assembly 100.

[0078] Since the CMC outer ring assembly 2 includes a CMC outer ring 22 and a first housing 23, and the metal outer ring assembly 3 includes a metal outer ring 32 and a second housing 33, and the CMC outer ring 22 and the first housing 23 or the metal outer ring 32 and the second housing 33 are separate components and both will undergo thermal deformation, in order to avoid the sealing assembly 100 being damaged under load due to thermal deformation between the outer ring and the housing, the sealing base plate 1 is designed to have a separate upper base plate 11 and a lower base plate 12, which can be assembled together. In this embodiment, the sealing base plate 1 is divided into two pieces; in other embodiments, the sealing base plate 1 can also be divided into more pieces.

[0079] To avoid interference between the upper and lower end faces during assembly of the upper base plate 11 and the lower base plate 12, the shape of the upper end face of the lower base plate 12 is adapted to the shape of the lower end face of the upper base plate 11, thus making assembly easier and making more efficient use of space. After assembly, the upper end face of the lower base plate 12 and the lower end face of the upper base plate 11 can fit tightly together, or an opening can be left after assembly to serve as a connection port for the cold air cavity.

[0080] Specifically, the upper base plate 11 includes a first horizontal plate 111 arranged horizontally and two first vertical plates 112 arranged vertically at both ends of the first horizontal plate 111. The first vertical plates 112 extend vertically downward from the end of the first horizontal plate 111 and fit against the end face of the lower base plate 12.

[0081] In order to improve the structural strength of the upper base plate 11, at least one end of the first horizontal plate 111 is in surface contact with the first vertical plate 112. That is to say, the cross section of the first horizontal plate 111 can be triangular, rectangular, trapezoidal or other shapes.

[0082] The first sealing rib 4 is used to insert into the first sealing groove 21 on the end face of the CMC outer ring assembly 2. Since the CMC outer ring assembly 2 includes a separate CMC outer ring 22 and a first housing 23, and both the CMC outer ring 22 and the first housing 23 are provided with the first sealing groove 21, the first sealing rib 4 includes a first protrusion 41 and a second protrusion 42 which are respectively inserted into the first sealing groove 21 of the first housing 23 and the first sealing groove 21 of the CMC outer ring 22. The first protrusion 41 extends downward from the top of the sealing base plate 1, and the second protrusion 42 extends upward from the bottom of the sealing base plate 1. Thus, the first protrusion 41 and the second protrusion 42 are used to achieve double sealing, resulting in a better sealing effect.

[0083] Specifically, the first protrusion 41 includes a second horizontal plate 411 and two second vertical plates 412, the two second vertical plates 412 extending downward from the top of the sealing base plate 1, and the two ends of the second horizontal plate 411 respectively connecting to the top ends of the two second vertical plates 412. The second protrusion 42 includes two third vertical plates 421, the two third vertical plates 421 extending upward from the bottom of the sealing base plate 1, and the third vertical plates 421 being located inside the second vertical plates 412.

[0084] The second sealing rib 5 is used to insert into the second sealing groove 31 on the end face of the metal outer ring assembly 3. Since the metal outer ring assembly 3 includes a separate metal outer ring 32 and a second housing 33, and both the metal outer ring 32 and the second housing 33 are provided with the second sealing groove 31, the second sealing rib 5 includes a third protrusion 51 and a fourth protrusion 52 which are respectively inserted into the second sealing groove 31 of the second housing 33 and the second sealing groove 31 of the metal outer ring 32. The third protrusion 51 extends downward from the top of the sealing base plate 1, and the fourth protrusion 52 extends upward from the bottom of the sealing base plate 1. Thus, the third protrusion 51 and the fourth protrusion 52 are used to achieve double sealing, resulting in a better sealing effect.

[0085] Specifically, the third protrusion 51 includes a first inclined plate 511 and two vertically extending fourth vertical plates 512. One side of each of the two fourth vertical plates 512 is in contact with the side of the sealing base plate 1, and one of the fourth vertical plates 512 extends beyond the top surface of the sealing base plate 1. The two ends of the first inclined plate 511 are respectively connected to the two fourth vertical plates 512. The fourth protrusion 52 includes a second inclined plate 521 extending obliquely upward from the bottom of the sealing base plate 1, a horizontal plate 522 extending horizontally from the top of the second inclined plate 521, and a third inclined plate 523 extending obliquely upward from the bottom of the second inclined plate 521. The inclination angle of the third inclined plate 523 can be the same as or different from the inclination angle of the second inclined plate 521. The second inclined plate 521, the horizontal plate 522, and the third inclined plate 523 form a shape similar to π with the bottom of the sealing base plate 1.

[0086] This embodiment also discloses a turbine outer ring, which includes a CMC outer ring assembly 2, a metal outer ring assembly 3, and a sealing assembly 100 for the turbine outer ring as described above. This achieves the sealing of the gaps between the sections of the turbine outer ring, preventing leakage; it also enables separate sealing for different end face structures of the CMC outer ring assembly 2 and the metal outer ring assembly 3.

[0087] This embodiment also discloses an aero-engine, which includes the aforementioned turbine outer ring. Therefore, this aero-engine can utilize the CMC outer ring assembly 2 to replace part of the metal outer ring assembly 3, achieving improved performance without leakage issues.

[0088] Example 2

[0089] Example 2 discloses another sealing assembly 100 for the turbine outer ring. Example 2 has a structure basically the same as Example 1, except that, as... Figure 10 As shown, the sealing base plate 1 of Embodiment 2 includes a connecting hole 13 for connecting the CMC outer ring assembly 2 and the metal outer ring assembly 3. The connecting hole 13 can be used to connect the cold air cavity of the CMC outer ring assembly 2 and the metal outer ring assembly 3. The shape, position, and whether the connecting hole 13 is provided can be determined according to the connection design requirements of the cold air cavity.

[0090] While specific embodiments of the present invention have been described above, those skilled in the art should understand that these are merely illustrative examples, and the scope of protection of the present invention is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, but all such changes and modifications fall within the scope of protection of the present invention.

Claims

1. A sealing assembly for a turbine outer ring, characterized in that, The sealing assembly includes: A sealing base plate is erected between the CMC outer ring assembly and the metal outer ring assembly. The end face of the CMC outer ring assembly is provided with a first sealing groove, and the end face of the metal outer ring assembly is provided with a second sealing groove. A first sealing rib and a second sealing rib are respectively disposed on the two sides of the sealing base plate and extend from the two sides of the sealing base plate in opposite directions. The first sealing rib is inserted into the first sealing groove and the second sealing rib is inserted into the second sealing groove. The first sealing rib and the second sealing rib have different structures.

2. The sealing assembly for the turbine outer ring as described in claim 1, characterized in that, The sealing base plate has a separate upper base plate and a lower base plate, which can be assembled together.

3. The sealing assembly for the turbine outer ring as described in claim 2, characterized in that, The shape of the upper end face of the lower base plate is adapted to the shape of the lower end face of the upper base plate.

4. The sealing assembly for the turbine outer ring as described in claim 2, characterized in that, The upper base plate includes a first horizontal plate arranged horizontally and a first vertical plate arranged vertically at both ends of the first horizontal plate. The first vertical plate extends vertically downward from the end of the first horizontal plate and fits against the end face of the lower base plate.

5. The sealing assembly for the turbine outer ring as described in claim 4, characterized in that, At least one end of the first horizontal plate is in surface contact with the first vertical plate.

6. The sealing assembly for the turbine outer ring as described in claim 1, characterized in that, The first sealing rib includes a first protrusion and a second protrusion. The first protrusion extends downward from the top of the sealing base plate, and the second protrusion extends upward from the bottom of the sealing base plate. The CMC outer ring assembly includes a CMC outer ring and a first housing. Both the CMC outer ring and the first housing are provided with the first sealing groove. The first protrusion and the second protrusion are respectively inserted into the first sealing groove of the first housing and the CMC outer ring.

7. The sealing assembly for the turbine outer ring as described in claim 6, characterized in that, The first protrusion includes a second horizontal plate and a second vertical plate. The second vertical plate extends downward from both ends of the sealing bottom plate, and the two ends of the second horizontal plate are respectively connected to the top ends of the second vertical plate.

8. The sealing assembly for the turbine outer ring as described in claim 7, characterized in that, The second protrusion includes a third vertical plate that extends upward from the bottom of the sealing base plate and is located inside the second vertical plate.

9. The sealing assembly for the turbine outer ring as described in claim 1, characterized in that, The second sealing rib includes a third protrusion and a fourth protrusion. The third protrusion extends downward from the top of the sealing base plate, and the fourth protrusion extends upward from the bottom of the sealing base plate. The metal outer ring assembly includes a metal outer ring and a second housing. Both the metal outer ring and the second housing are provided with the second sealing groove. The third protrusion and the fourth protrusion are respectively inserted into the second sealing groove of the second housing and the metal outer ring.

10. The sealing assembly for the turbine outer ring as described in claim 9, characterized in that, The third protrusion includes a first inclined plate and two vertically extending fourth vertical plates. One side of each of the two fourth vertical plates is in contact with the side of the sealing base plate, and one of the fourth vertical plates extends out of the top surface of the sealing base plate. The two ends of the first inclined plate are respectively connected to the two fourth vertical plates.

11. The sealing assembly for the turbine outer ring as described in claim 9, characterized in that, The fourth protrusion includes a second inclined plate extending upward from the bottom of the sealing base plate, a horizontal plate extending horizontally from the top of the second inclined plate, and a third inclined plate extending upward from the bottom of the second inclined plate.

12. The sealing assembly for the turbine outer ring as claimed in claim 1, characterized in that, The sealing base plate also includes a connecting hole for connecting the CMC outer ring assembly and the metal outer ring assembly.

13. A turbine outer ring, characterized in that, The turbine outer ring includes a CMC outer ring assembly, a metal outer ring assembly, and a sealing assembly for the turbine outer ring as described in any one of claims 1-12.

14. An aircraft engine, characterized in that, The aero-engine includes the turbine outer ring as described in claim 13.

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