Gas turbine and its sealing assembly

Abstract

The present invention discloses a gas turbine and its sealing assembly. The sealing assembly includes a first part, a second part and an annular plate. Both the first part and the second part are annular. The first part is sleeved outside the second part to define an annular space. The inner end of the first part has a first sealing portion, and the outer end of the second part has a second sealing portion. The annular plate is disposed between the first part and the second part to divide the annular space into a first chamber and a second chamber. The outer end of the annular plate has a first mating portion, and the inner end of the annular plate has a second mating portion. The first mating portion is in sealing cooperation with the first sealing portion to form an outer sealing portion, and the second mating portion is in sealing cooperation with the second sealing portion to form an inner sealing portion. Wherein, the number of the outer sealing portions is multiple, and the multiple outer sealing portions are arranged at intervals along the axial direction of the annular plate; and / or the number of the inner sealing portions is multiple, and the multiple inner sealing portions are arranged at intervals along the axial direction of the annular plate. The sealing assembly of the embodiment of the present invention has advantages such as good sealing effect.

Description

Technical Field

[0001] The present invention relates to the technical field of gas turbines, and particularly relates to a gas turbine and its sealing assembly. Background Art

[0002] During the process of starting up to stable operation and from stable operation to shutdown of a heavy-duty gas turbine, due to different temperature rise aging of each component, the deformation amounts of each component in the radial and axial directions are also different, and there will be a large relative displacement between components. For example, there will be a large relative displacement between the transition section of the combustion chamber and the first-stage stationary blade of the turbine, between the compressor exhaust diffuser and the first-stage stationary blade, and between the outer cylinder of the turbine and the retaining ring of the stationary blade. The sealing structures provided between these components not only need to have sufficient strength and service life under a large relative displacement amount, but also require the best possible sealing performance.

[0003] In the related art, an annular plate is provided between two components to achieve sealing between adjacent two chambers. Specifically, the inner end of the annular plate forms a line contact with one of the components to achieve a throttling sealing effect, and the outer end of the annular plate forms a line contact with the other component to achieve a throttling sealing effect. Although the above annular plate can satisfy a large relative displacement between two components and play a certain sealing role, when any one of the above two components and the annular plate deforms greatly, it is difficult for the annular plate to maintain a whole-circle fit with the two components, resulting in a large leakage amount between adjacent two chambers, affecting the efficiency and service life of the gas turbine. Summary of the Invention

[0004] The present invention aims to solve at least one of the technical problems in the related art to some extent.

[0005] To this end, an embodiment of the present invention provides a sealing assembly to improve the sealing effect of the sealing assembly.

[0006] The sealing assembly of the embodiment of the present invention includes a first member, a second member, and an annular plate. Both the first member and the second member are annular. The first member is sleeved outside the second member to define an annular space. The inner end of the first member has a first sealing portion, and the outer end of the second member has a second sealing portion. The annular plate is disposed between the first member and the second member to divide the annular space into a first chamber and a second chamber. The outer end of the annular plate has a first mating portion, and the inner end of the annular plate has a second mating portion. The first mating portion is in sealing cooperation with the first sealing portion to form an outer sealing portion, and the second mating portion is in sealing cooperation with the second sealing portion to form an inner sealing portion. Wherein, the number of the outer sealing portions is multiple, and the multiple outer sealing portions are arranged at intervals along the axial direction of the annular plate; and / or the number of the inner sealing portions is multiple, and the multiple inner sealing portions are arranged at intervals along the axial direction of the annular plate.

[0007] The sealing assembly according to the embodiments of the present invention has advantages such as good sealing effect.

[0008] In some embodiments, the first sealing portion is a first groove with a notch facing inwards, the first mating portion is a first protrusion protruding outwards, the first protrusion is inserted into the first groove, and the first protrusion axially abuts against the groove side wall of the first groove along the axis of the annular plate; the second sealing portion is a second groove with a notch facing outwards, the second mating portion is a second protrusion protruding inwards, the second protrusion is inserted into the second groove, and the second protrusion axially abuts against the groove side wall of the second groove along the axis of the annular plate.

[0009] In some embodiments, the inner end of the first member has a third sealing portion, the third sealing portion and the first sealing portion are axially spaced along the axis of the annular plate, the outer end of the annular plate has a third protrusion protruding outwards, the third protrusion is arranged lower than the first protrusion, and the outer end of the third protrusion is in clearance fit with the third sealing portion; the outer end of the second member has a fourth sealing portion, the fourth sealing portion and the second sealing portion are axially spaced along the axis of the annular plate, the inner end of the annular plate has a fourth protrusion protruding inwards, the fourth protrusion is arranged lower than the second protrusion, and the inner end of the fourth protrusion is in clearance fit with the fourth sealing portion.

[0010] In some embodiments, the annular plate includes a plate body, a first connecting portion and a second connecting portion, the first connecting portion is arranged at the outer end of the plate body, and the first protrusion and the third protrusion are both arranged at the outer end of the first connecting portion; the second connecting portion is arranged at the inner end of the plate body, and the second protrusion and the fourth protrusion are both arranged at the inner end of the second connecting portion; wherein, in the axial direction of the annular plate, the sizes of the first connecting portion and the second connecting portion are both larger than the size of the plate body.

[0011] In some embodiments, the first connecting portion includes a first arc segment, a first straight segment and a second arc segment arranged in sequence from inside to outside, the inner end of the first arc segment is connected to the plate body, the outer end of the second arc segment is connected to the first protrusion, and the third protrusion is arranged on the second arc segment; the second connecting portion includes a third arc segment, a second straight segment and a fourth arc segment arranged in sequence from outside to inside, the outer end of the third arc segment is connected to the plate body, the inner end of the fourth arc segment is connected to the second protrusion, and the fourth protrusion is arranged on the fourth arc segment.

[0012] In some embodiments, at least one of the two opposite surfaces of the first arc segment, the second arc segment, the third arc segment and the fourth arc segment in the axial direction of the annular plate is a concave arc surface.

[0013] In some embodiments, the number of the outer sealing parts is plural, and the third protrusion is arranged between two adjacent outer sealing parts in the axial direction of the annular plate; the number of the inner sealing parts is plural, and the fourth protrusion is arranged between two adjacent inner sealing parts in the axial direction of the annular plate.

[0014] In some embodiments, the number of the outer sealing parts is two, and the third protrusion is arranged between the two outer sealing parts in the axial direction of the annular plate; the number of the inner sealing parts is two, and the fourth protrusion is arranged between the two inner sealing parts in the axial direction of the annular plate.

[0015] In some embodiments, the annular plate is symmetrically arranged along the axial direction of the annular plate.

[0016] In some embodiments, the third protrusion and the first protrusion are arranged at intervals in the axial direction of the annular plate, and the surface of the connection part between the third protrusion and the adjacent first protrusion is a concave arc surface; the fourth protrusion and the second protrusion are arranged at intervals in the axial direction of the annular plate, and the surface of the connection part between the fourth protrusion and the adjacent second protrusion is a concave arc surface.

[0017] In some embodiments, the first protrusion and the bottom wall of the first groove are arranged at intervals in the inner and outer directions; and / or the second protrusion and the bottom wall of the second groove are arranged at intervals in the inner and outer directions.

[0018] In some embodiments, the first protrusion has a first mating surface and a second mating surface which are arranged opposite to each other in the axial direction of the annular plate, both the first mating surface and the second mating surface are arc surfaces, and the first mating surface and the second mating surface are adapted to axially abut against the side wall of the first groove along the axial direction of the annular plate; the second protrusion has a third mating surface and a fourth mating surface which are arranged opposite to each other in the axial direction of the annular plate, both the third mating surface and the fourth mating surface are arc surfaces, and the third mating surface and the fourth mating surface are adapted to axially abut against the side wall of the second groove along the axial direction of the annular plate.

[0019] In some embodiments, at least one of the first mating surface, the second mating surface, the third mating surface and the fourth mating surface is a convex arc surface.

[0020] An embodiment of the present invention further provides a gas turbine.

[0021] The gas turbine according to the embodiment of the present invention includes the sealing assembly according to any one of the above embodiments. Description of the Drawings

[0022] Figure 1 It is a partial structural schematic diagram of the sealing assembly according to an embodiment of the present invention.

[0023] Figure 2 is Figure 1 a partial structural schematic diagram of

[0024] Figure 3 is Figure 2 an enlarged view of part A in

[0025] Figure 4 is Figure 2 an enlarged view of part B in

[0026] Figure 5 a partial structural schematic diagram of the sealing component of another embodiment of the present invention.

[0027] Reference numerals:

[0028] sealing component 100;

[0029] first piece 1; first sealing part 101; third sealing part 102;

[0030] second piece 2; second sealing part 201; fourth sealing part 202;

[0031] annular plate 3; first mating part 301; first mating surface 3011; second mating surface 3012; second mating part 302; third mating surface 3021; fourth mating surface 3022; third protrusion 303; fourth protrusion 304; plate body 305; first connecting part 306; first arc segment 3061; first straight segment 3062; second arc segment 3063; second connecting part 307; third arc segment 3071; second straight segment 3072; fourth arc segment 3073;

[0032] first chamber 4;

[0033] second chamber 5. Detailed Description of the Invention

[0034] The embodiments of the present invention will be described in detail below, and the examples of the embodiments are shown in the accompanying drawings. The embodiments described below by referring to the accompanying drawings are exemplary and are intended to explain the present invention, and should not be construed as limiting the present invention.

[0035] As shown in Figures 1 to 5As shown in the figure, the sealing assembly of the embodiment of the present invention includes a first member 1, a second member 2, and an annular plate 3. Both the first member 1 and the second member 2 are annular. The first member 1 is sleeved outside the second member 2 to define an annular space. The inner end of the first member 1 has a first sealing portion 101, and the outer end of the second member 2 has a second sealing portion 201. The annular plate 3 is disposed between the first member 1 and the second member 2 to divide the annular space into a first chamber 4 and a second chamber 5. The outer end of the annular plate 3 has a first fitting portion 301, and the first fitting portion 301 is in sealing fit with the first sealing portion 101 to form an outer sealing portion. The inner end of the annular plate 3 has a second fitting portion 302, and the second fitting portion 302 is in sealing fit with the second sealing portion 201 to form an inner sealing portion.

[0036] Herein, "inward" refers to the direction adjacent to the axis of the annular plate 3 in a plane perpendicular to the axis of the annular plate 3; "outward" refers to the direction away from the axis of the annular plate 3 in a plane perpendicular to the axis of the annular plate 3. The inner and outer directions are as Figure 1 shown in the figure. The inner end of the annular plate 3 is disposed closer to the axis of the annular plate 3 than the outer end of the annular plate 3.

[0037] The number of the outer sealing portions is multiple, and the multiple outer sealing portions are arranged at intervals along the axial direction of the annular plate 3; and / or the number of the inner sealing portions is multiple, and the multiple inner sealing portions are arranged at intervals along the axial direction of the annular plate 3.

[0038] The number of the outer sealing portions is multiple, and / or the number of the inner sealing portions is multiple. It can be understood that: the number of the outer sealing portions is multiple and the number of the inner sealing portions is one (as Figure 5 shown in the figure); or, the number of the outer sealing portions is one and the number of the inner sealing portions is multiple; or, the numbers of both the outer sealing portions and the inner sealing portions are multiple.

[0039] It can be understood that when the number of the outer sealing portions is multiple, the numbers of both the first sealing portion 101 and the first fitting portion 301 are multiple. Each first fitting portion 301 is in sealing fit with one of the first sealing portions 101, and each first sealing portion 101 is in sealing fit with one of the first fitting portions 301 to form multiple outer sealing portions. For example, the multiple first sealing portions 101 correspond to the multiple first fitting portions 301 one by one, and each first sealing portion 101 is in sealing fit with the corresponding first fitting portion 301. When the number of the inner sealing portions is multiple, the numbers of both the second sealing portion 201 and the second fitting portion 302 are multiple. Each second fitting portion 302 is in sealing fit with one of the second sealing portions 201, and each second sealing portion 201 is in sealing fit with one of the second fitting portions 302 to form multiple inner sealing portions. For example, the multiple second sealing portions 201 correspond to the multiple second fitting portions 302 one by one, and each second sealing portion 201 is in sealing fit with the corresponding second fitting portion 302.

[0040] The sealing assembly 100 according to the embodiment of the present invention is as follows Figure 1 As shown, the first member 1 is sleeved outside the second member 2, and the first member 1 and the second member 2 are arranged at intervals in the inner and outer direction, so that an annular space is defined between the first member 1 and the second member 2. The annular plate 3 is arranged between the first member 1 and the second member 2, and the annular plate 3 divides the annular space into a first chamber 4 and a second chamber 5. Among them, both the first chamber 4 and the second chamber 5 are annular chambers.

[0041] By providing a first sealing portion 101 at the inner end of the first member 1 and simultaneously providing a first mating portion 301 at the outer end of the annular plate 3, an outer sealing portion is formed by the sealing cooperation between the first sealing portion 101 and the first mating portion 301, so that when the first member 1 and the annular plate 3 can move relatively, the sealing between the outer ends of the first member 1 and the annular plate 3 is realized; by providing a second sealing portion 201 at the outer end of the second member 2 and simultaneously providing a second mating portion 302 at the inner end of the annular plate 3, an inner sealing portion is formed by the sealing cooperation between the second sealing portion 201 and the second mating portion 302, so that when the second member 2 and the annular plate 3 can move relatively, the sealing between the inner ends of the second member 2 and the annular plate 3 is realized, thereby realizing the sealing between the first chamber 4 and the second chamber 5.

[0042] When the number of the outer sealing portions is multiple and the multiple outer sealing portions are arranged at intervals along the axial direction of the annular plate 3, there are multiple sealing cooperation places between the first member 1 and the annular plate 3. Compared with the related art where there is only one sealing between the annular plate and each component, there are more sealing cooperation places and a larger sealing area between the annular plate 3 and the first member 1 in the sealing assembly 100 according to the embodiment of the present invention, so that the sealing between the first chamber 4 and the second chamber 5 can be realized more effectively, the leakage amount between the first chamber 4 and the second chamber 5 can be effectively reduced, and thus it is beneficial to improve the efficiency of the gas turbine having the sealing assembly 100 and extend the service life of the gas turbine having the sealing assembly 100.

[0043] When the number of the inner sealing portions is multiple and the multiple inner sealing portions are arranged at intervals along the axial direction of the annular plate 3, there are multiple sealing cooperation places between the second member 2 and the annular plate 3. Compared with the related art where there is only one sealing between the annular plate and each component, there are more sealing cooperation places and a larger sealing area between the annular plate 3 and the second member 2 in the sealing assembly 100 according to the embodiment of the present invention, so that the sealing between the first chamber 4 and the second chamber 5 can be realized more effectively, the leakage amount between the first chamber 4 and the second chamber 5 can be effectively reduced, and thus it is beneficial to improve the efficiency of the gas turbine having the sealing assembly 100 and extend the service life of the gas turbine having the sealing assembly 100.

[0044] In addition, it can be understood that when the gas pressures in the first chamber 4 and the second chamber 5 are different, for example, when the gas pressure in the first chamber 4 is greater than that in the second chamber 5, the gas in the first chamber 4 easily flows to the second chamber 5 through the outer sealing portion and the inner sealing portion, resulting in gas leakage. When the number of the outer sealing portions is multiple, during the process of the gas flowing from the first chamber 4 to the second chamber 5, a part of the gas is located between two adjacent outer sealing portions, such that the gas pressure between two adjacent sealing portions is less than the gas pressure in the first chamber 4 and greater than the gas pressure in the second chamber 5. Thus, the gas pressure difference across the axial two sides of each outer sealing portion is small, which is beneficial to reducing the gas flow rate from the first chamber 4 to the second chamber 5, thereby reducing the leakage amount of the first chamber 4 and improving the sealing effect of the flow sealing assembly 100. Similarly, when the number of the inner sealing portions is multiple, the gas pressure difference across the axial two sides of each inner sealing portion is also small, which is beneficial to reducing the gas flow rate from the first chamber 4 to the second chamber 5, thereby reducing the leakage amount of the first chamber 4 and improving the sealing effect of the flow sealing assembly 100.

[0045] Therefore, the sealing assembly 100 of the embodiment of the present invention has advantages such as good sealing effect.

[0046] In some embodiments, the first sealing portion 101 is a first groove with the notch facing inwards, the first mating portion 301 is a first protrusion protruding outwards, the first protrusion is inserted into the first groove, and the first protrusion axially abuts against the groove side wall of the first groove along the annular plate 3. The second sealing portion 201 is a second groove with the notch facing outwards, the second mating portion 302 is a second protrusion protruding inwards, the second protrusion is inserted into the second groove, and the second protrusion axially abuts against the groove side wall of the second groove along the annular plate 3.

[0047] For example, as Figures 2 to 4 shown, the first protrusion is inserted into the first groove through the notch of the first groove, and the sealing fit between the first sealing portion 101 and the first mating portion 301 is achieved by axially abutting the first protrusion against the groove side wall of the first groove along the annular plate 3. The second protrusion is inserted into the second groove through the notch of the second groove, and the sealing fit between the second sealing portion 201 and the second mating portion 302 is achieved by axially abutting the second protrusion against the groove side wall of the second groove along the annular plate 3.

[0048] By setting the first sealing portion 101 as the first groove, the first mating portion 301 as the first protrusion and inserting the first protrusion into the first groove, and setting the second sealing portion 201 as the second groove, the second mating portion 302 as the second protrusion and inserting the second protrusion into the second groove, it is convenient to realize the fit between the first sealing portion 101 and the first mating portion 301 and the fit between the second sealing portion 201 and the second mating portion 302.

[0049] Of course, in some other embodiments, the first sealing portion may also be a first protrusion, while the first mating portion is a first groove; the second sealing portion may also be a second protrusion, while the second mating portion is a second groove.

[0050] Those skilled in the art can understand that when the first mating portion is set as the first groove and the second mating portion is set as the second groove, the annular plate needs to have a relatively large thickness to ensure the structural strength of the annular plate. Therefore, in order to reduce the thickness of the annular plate, preferably, the first sealing portion 101 is set as the first groove and the second sealing portion 201 is set as the second groove.

[0051] Optionally, the first protrusion and the bottom wall of the first groove are spaced apart in the inner and outer directions.

[0052] For example, as Figure 3 shown, there is a gap between the outer end of the first protrusion and the bottom wall of the first groove. Thus, when the annular plate 3 deforms, the gap between the first protrusion and the bottom wall of the first groove can serve as the deformation space of the annular plate 3, preventing the annular plate 3 from being squeezed by the first piece 1 due to deformation and causing the annular plate 3 to break, which is beneficial to further extending the service life of the gas turbine having the sealing assembly 100.

[0053] Optionally, the second protrusion and the bottom wall of the second groove are spaced apart in the inner and outer directions.

[0054] For example, as Figure 4 shown, there is a gap between the inner end of the second protrusion and the bottom wall of the second groove. Thus, when the annular plate 3 deforms, the gap between the second protrusion and the bottom wall of the second groove can serve as the deformation space of the annular plate 3, preventing the annular plate 3 from being squeezed by the second piece 2 due to deformation and causing the annular plate 3 to break, which is beneficial to further extending the service life of the gas turbine having the sealing assembly 100.

[0055] Optionally, the annular plate 3 includes a plurality of plate segments, and the plurality of plate segments are sequentially connected end to end along the circumference of the annular plate 3 to form the annular annular plate 3, and adjacent plate segments can be connected by lapping, welding or fasteners.

[0056] By setting the annular plate 3 to include a plurality of plate segments, when installing the annular plate 3 between the first piece 1 and the second piece 2, the plurality of plate segments can be respectively installed between the first piece 1 and the second piece 2 in sequence, thus facilitating the installation and fixation of the annular plate 3.

[0057] Optionally, each plate segment is integrally formed.

[0058] For example, each plate segment is integrally cast, or each plate segment is formed by machining.

[0059] Optionally, the first protrusion has a first mating surface 3011 and a second mating surface 3012 that are axially oppositely arranged along the annular plate 3. Both the first mating surface 3011 and the second mating surface 3012 are arc-shaped surfaces. The first mating surface 3011 and the second mating surface 3012 are adapted to axially abut against the groove side walls of the first groove along the annular plate 3. The second protrusion has a third mating surface 3021 and a fourth mating surface 3022 that are axially oppositely arranged along the annular plate 3. Both the third mating surface 3021 and the fourth mating surface 3022 are arc-shaped surfaces. The third mating surface 3021 and the fourth mating surface 3022 are adapted to axially abut against the groove side walls of the second groove along the annular plate 3.

[0060] To make the technical solution of the present application easier to understand, the following takes the axial direction of the annular plate 3 being consistent with the left-right direction as an example to further describe the technical solution of the present application. Among them, the left-right direction is as Figures 1 to 4 shown.

[0061] For example, as Figures 1 to 4 shown, the first chamber 4 is provided on the left side of the second chamber 5. Each first protrusion has a first mating surface 3011 and a second mating surface 3012. In the same first protrusion, the first mating surface 3011 is provided on the left side of the second mating surface 3012. Each second protrusion has a third mating surface 3021 and a fourth mating surface 3022. In the same second protrusion, the third mating surface 3021 is provided on the left side of the fourth mating surface 3022.

[0062] It can be understood that when the gas pressures in the first chamber 4 and the second chamber 5 are different, the annular plate 3 is biased to one side in the left-right direction under the action of the gas pressure difference between the first chamber 4 and the second chamber 5, so that one of the first mating surface 3011 and the second mating surface 3012 axially abuts against one of the groove side walls of the first groove along the annular plate 3, and one of the third mating surface 3021 and the fourth mating surface 3022 axially abuts against one of the groove side walls of the first groove along the annular plate 3. For example, when the gas pressure in the first chamber 4 is greater than the gas pressure in the second chamber 5, the annular plate 3 is biased to the right side. The second mating surface 3012 of each first protrusion abuts against the right groove wall of the corresponding first groove in the left-right direction, and the fourth mating surface 3022 of each second protrusion abuts against the right groove wall of the corresponding first groove in the left-right direction. Similarly, when the gas pressure in the first chamber 4 is less than the gas pressure in the second chamber 5, the annular plate 3 is biased to the left side. At this time, the first mating surface 3011 of each first protrusion abuts against the left groove wall of the corresponding first groove in the left-right direction, and the third mating surface 3021 of each second protrusion abuts against the left groove wall of the corresponding first groove in the left-right direction.

[0063] By setting the first mating surface 3011, the second mating surface 3012, the third mating surface 3021, and the fourth mating surface 3022 as arc-shaped surfaces, it is beneficial to improve the structural strength of the first protrusion and the second protrusion, thereby facilitating further extension of the service life of the gas turbine having the sealing assembly 100.

[0064] Optionally, at least one of the first mating surface 3011, the second mating surface 3012, the third mating surface 3021, and the fourth mating surface 3022 is a convex arc surface.

[0065] For example, as Figure 3 and Figure 4 shown, the first mating surface 3011 is a convex arc surface protruding leftward. Thus, when the first mating surface 3011 abuts against the groove side wall of the first groove in the left-right direction, a line contact is formed between the first protrusion and the first groove, and the machining precision requirement for the portion of the first mating surface 3011 that does not contact the groove side wall of the first groove is relatively low. The second mating surface 3012 is a convex arc surface protruding rightward. Thus, when the second mating surface 3012 abuts against the groove side wall of the first groove in the left-right direction, a line contact is formed between the first protrusion and the first groove, and the machining precision requirement for the portion of the second mating surface 3012 that does not contact the groove side wall of the first groove is relatively low. The third mating surface 3021 is a convex arc surface protruding leftward. Thus, when the third mating surface 3021 abuts against the groove side wall of the second groove in the left-right direction, a line contact is formed between the second protrusion and the second groove, and the machining precision requirement for the portion of the third mating surface 3021 that does not contact the groove side wall of the second groove is relatively low. The fourth mating surface 3022 is a convex arc surface protruding rightward. Thus, when the fourth mating surface 3022 abuts against the groove side wall of the second groove in the left-right direction, a line contact is formed between the second protrusion and the second groove, and the machining precision requirement for the portion of the fourth mating surface 3022 that does not contact the groove side wall of the second groove is relatively low.

[0066] Thus, by setting at least one of the first mating surface 3011, the second mating surface 3012, the third mating surface 3021, and the fourth mating surface 3022 as a convex arc surface, the machining precision of at least one of the first protrusion and the second protrusion can be reduced, thereby facilitating cost reduction of the sealing assembly 100.

[0067] Optionally, the inner end of the first piece 1 has a third sealing portion 102. The third sealing portion 102 and the first sealing portion 101 are arranged at an axial interval along the annular plate 3. The outer end of the annular plate 3 has a third protrusion 303 protruding outward. The third protrusion 303 is lower than the first protrusion. The outer end of the third protrusion 303 is in clearance fit with the third sealing portion 102. The outer end of the second piece 2 has a fourth sealing portion 202. The fourth sealing portion 202 and the second sealing portion 201 are arranged at an axial interval along the annular plate 3. The inner end of the annular plate 3 has a fourth protrusion 304 protruding inward. The fourth protrusion 304 is lower than the second protrusion. The inner end of the fourth protrusion 304 is in clearance fit with the fourth sealing portion 202.

[0068] By arranging the third sealing portion 102 at the inner end of the first piece 1 and the third protrusion 303 at the outer end of the annular plate 3, with the third protrusion 303 in clearance fit with the third sealing portion 102, the clearance between the third protrusion 303 and the third sealing portion 102 can be used to increase the flow resistance of the gas flowing through the outer mating portion, thereby facilitating further reduction of the leakage amount between the first chamber 4 and the second chamber 5. Similarly, by arranging the fourth sealing portion 202 at the outer end of the second piece 2 and the fourth protrusion 304 at the inner end of the annular plate 3, with the fourth protrusion 304 in clearance fit with the fourth sealing portion 202, the clearance between the fourth protrusion 304 and the fourth sealing portion 202 can be used to increase the flow resistance of the gas flowing through the inner mating portion, thereby facilitating further reduction of the leakage amount between the first chamber 4 and the second chamber 5, which is beneficial to further improving the efficiency of the gas turbine with the sealing assembly 100 and extending the service life of the gas turbine with the sealing assembly 100.

[0069] Optionally, the annular plate 3 includes a plate body 305, a first connecting portion 306 and a second connecting portion 307. The first connecting portion 306 is arranged at the outer end of the plate body 305. Both the first protrusion and the third protrusion 303 are arranged at the outer end of the first connecting portion 306. The second connecting portion 307 is arranged at the inner end of the plate body 305. Both the second protrusion and the fourth protrusion 304 are arranged at the inner end of the second connecting portion 307. Among them, in the axial direction of the annular plate 3, the sizes of both the first connecting portion 306 and the second connecting portion 307 are larger than the size of the plate body 305.

[0070] For example, as Figures 2 to 4 shown, the sizes of both the first connecting portion 306 and the second connecting portion 307 in the left - right direction are larger than the size of the plate body 305, so that the structural strength at the first connecting portion 306 and the second connecting portion 307 is higher, which is beneficial to improving the overall strength of the annular plate 3 and further extending the service life of the gas turbine with the sealing assembly 100.

[0071] Optionally, the first connecting portion 306 includes a first arc segment 3061, a first straight segment 3062, and a second arc segment 3063 arranged in sequence from inside to outside. The inner end of the first arc segment 3061 is connected to the plate body 305, the outer end of the second arc segment 3063 is connected to the first protrusion, and the third protrusion 303 is provided on the second arc segment 3063.

[0072] For example, as Figure 2 and Figure 3 shown, the first connecting portion 306 has a first side surface and a second side surface that are opposite in the left-right direction. The portions of the first side surface and the second side surface corresponding to the first arc segment 3061 are arc surfaces, the portions corresponding to the first straight segment 3062 are flat surfaces, and the portions corresponding to the second arc segment 3063 are arc surfaces. Thus, the stress concentration phenomenon at the joints between the first connecting portion 306 and the plate body 305 and between the first connecting portion 306 and the first protrusion can be reduced, which is beneficial to improving the structural strength of the joints between the first connecting portion 306 and the plate body 305 and between the first connecting portion 306 and the first protrusion. Consequently, it is beneficial to enhancing the overall strength of the annular plate 3 and further extending the service life of the gas turbine with the sealing assembly 100.

[0073] Optionally, the second connecting portion 307 includes a third arc segment 3071, a second straight segment 3072, and a fourth arc segment 3073 arranged in sequence from inside to outside. The outer end of the third arc segment 3071 is connected to the plate body 305, the inner end of the fourth arc segment 3073 is connected to the second protrusion, and the fourth protrusion 304 is provided on the fourth arc segment 3073.

[0074] For example, as Figure 2 and Figure 4 shown, the second connecting portion 307 has a third side surface and a fourth side surface that are opposite in the left-right direction. The portions of the third side surface and the fourth side surface corresponding to the third arc segment 3071 are arc surfaces, the portions corresponding to the second straight segment 3072 are flat surfaces, and the portions corresponding to the fourth arc segment 3073 are arc surfaces. Thus, the stress concentration phenomenon at the joints between the second connecting portion 307 and the plate body 305 and between the second connecting portion 307 and the second protrusion can be reduced, which is beneficial to improving the structural strength of the joints between the second connecting portion 307 and the plate body 305 and between the second connecting portion 307 and the second protrusion. Consequently, it is beneficial to enhancing the overall strength of the annular plate 3 and further extending the service life of the gas turbine with the sealing assembly 100.

[0075] Optionally, at least one of the two surfaces of the first arc segment 3061, the second arc segment 3063, the third arc segment 3071, and the fourth arc segment 3073 that are opposite in the axial direction of the annular plate 3 are concave arc surfaces.

[0076] For example, as Figure 3 and Figure 4 shown, the two axially opposite surfaces of the first arc segment 3061, the second arc segment 3063, the third arc segment 3071, and the fourth arc segment 3073 on the annular plate 3 are concave arc surfaces.

[0077] Optionally, the number of outer sealing portions is multiple, and the third protrusion 303 is arranged between two adjacent outer sealing portions in the axial direction of the annular plate 3. The number of inner sealing portions is multiple, and the fourth protrusion 304 is arranged between two adjacent inner sealing portions in the axial direction of the annular plate 3.

[0078] The number of outer sealing portions is multiple, that is, the number of the first protrusions and the first grooves is multiple; the third protrusion 303 is arranged between two adjacent outer sealing portions in the axial direction of the annular plate 3, that is, the third protrusion 303 is arranged between two adjacent first protrusions in the axial direction of the annular plate 3. The number of inner sealing portions is multiple, that is, the number of the second protrusions and the second grooves is multiple; the fourth protrusion 304 is arranged between two adjacent inner sealing portions in the axial direction of the annular plate 3, that is, the fourth protrusion 304 is arranged between two adjacent second protrusions in the axial direction of the annular plate 3.

[0079] By arranging the third protrusion 303 between two adjacent outer sealing portions and arranging the fourth protrusion 304 between two adjacent inner sealing portions, the leakage amount between the first chamber 4 and the second chamber 5 can be more effectively reduced, which is beneficial to further improving the efficiency of the gas turbine with the sealing assembly 100 and extending the service life of the gas turbine with the sealing assembly 100.

[0080] Optionally, the distance between two adjacent first grooves is equal to the distance between two adjacent first protrusions, and the distance between two adjacent second grooves is equal to the distance between two adjacent second protrusions. Specifically, the distance between the right side walls of two adjacent first grooves in the left-right direction is equal to the distance between the second mating surfaces 3012 of two adjacent first protrusions in the left-right direction; the distance between the left side walls of two adjacent first grooves in the left-right direction is equal to the distance between the first mating surfaces 3011 of two adjacent first protrusions in the left-right direction. The distance between the right side walls of two adjacent second grooves in the left-right direction is equal to the distance between the fourth mating surfaces 3022 of two adjacent second protrusions in the left-right direction; the distance between the left side walls of two adjacent second grooves in the left-right direction is equal to the distance between the third mating surfaces 3021 of two adjacent second protrusions in the left-right direction.

[0081] Thereby, multiple first protrusions can be simultaneously in sealing fit with corresponding first grooves, and multiple second protrusions can be simultaneously in sealing fit with corresponding second grooves.

[0082] Optionally, the number of outer sealing parts is two, and the third protrusion 303 is arranged between the two outer sealing parts in the axial direction of the annular plate 3. The number of inner sealing parts is two, and the fourth protrusion 304 is arranged between the two inner sealing parts in the axial direction of the annular plate 3.

[0083] For example, as Figures 2 to 4 shown, the number of the first protrusions and the first grooves is two each. The two first protrusions and the two first grooves are in one-to-one correspondence and are sealingly engaged to form two outer sealing parts. The two outer sealing parts are arranged at intervals in the left-right direction, and the third protrusion 303 is arranged between the two first protrusions in the left-right direction. The number of the second protrusions and the second grooves is two each. The two second protrusions and the two second grooves are in one-to-one correspondence and are sealingly engaged to form two inner sealing parts. The two inner sealing parts are arranged at intervals in the left-right direction, and the fourth protrusion 304 is arranged between the two second protrusions in the left-right direction.

[0084] By setting the number of both the outer sealing parts and the inner sealing parts to two, and arranging the third protrusion 303 between the two outer sealing parts and the fourth protrusion 304 between the two inner sealing parts, while ensuring that the sealing assembly 100 has good sealing performance, it is beneficial to simplify the structure of the sealing assembly 100, thereby facilitating the processing and manufacturing of the sealing assembly 100.

[0085] Optionally, the annular plate 3 is symmetrically arranged along the axial direction of the annular plate 3.

[0086] The annular plate 3 is symmetrically arranged along the axial direction of the annular plate 3, which is convenient for the processing and manufacturing of the annular plate 3, thereby facilitating the reduction of the manufacturing cost of the sealing assembly 100.

[0087] Optionally, the third protrusion 303 and the first protrusion are arranged at intervals along the axial direction of the annular plate 3, and the surface of the connection between the third protrusion 303 and the adjacent first protrusion is a concave arc surface. The fourth protrusion 304 and the second protrusion are arranged at intervals along the axial direction of the annular plate 3, and the surface of the connection between the fourth protrusion 304 and the adjacent second protrusion is a concave arc surface.

[0088] For example, as Figures 2 to 4As shown, the third protrusion 303 is spaced from the first protrusion in the left - right direction. The third protrusion 303 is located between two first protrusions in the left - right direction, and the surface of the connection between the third protrusion 303 and each first protrusion is a concave arc surface. Thus, the stress concentration phenomenon at the connection between the third protrusion 303 and the first protrusion can be reduced, which is beneficial to improving the structural strength at the connection between the third protrusion 303 and the first protrusion. The fourth protrusion 304 is spaced from the second protrusion in the left - right direction. The fourth protrusion 304 is located between two second protrusions in the left - right direction, and the surface of the connection between the fourth protrusion 304 and each second protrusion is a concave arc surface. Thus, the stress concentration phenomenon at the connection between the fourth protrusion 304 and the second protrusion can be reduced, which is beneficial to improving the structural strength at the connection between the fourth protrusion 304 and the second protrusion.

[0089] Therefore, it is beneficial to improve the overall strength of the annular plate 3 and further extend the service life of the gas turbine with the sealing assembly 100.

[0090] The gas turbine according to an embodiment of the present invention includes the sealing assembly 100 described in any one of the above - mentioned embodiments.

[0091] Among them, the first component 1 can be a hot - end component, and the second component 2 can be a cooling component. When the gas turbine is operating normally, the temperature of the hot - end component is higher than that of the cold - end component. For example, the first component 1 can be a combustion chamber transition section, a compressor exhaust diffuser, or a turbine outer cylinder; the second component 2 can be a retaining ring of a stationary turbine blade.

[0092] Since the sealing assembly 100 has advantages such as good sealing effect, the gas turbine according to an embodiment of the present invention has advantages such as high efficiency and long service life.

[0093] In addition, it can be understood that in a gas turbine, the temperature of the chamber with generally higher gas pressure inside is also higher. For example, if the gas pressure in the first chamber 4 is higher than that in the second chamber 5, then the gas temperature in the first chamber 4 is also higher than that in the second chamber 5. When the gases in the first chamber 4 and the second chamber 5 are cooling gases, the sealing assembly 100 can reduce the leakage of the cooling gas from the first chamber 4 to the second chamber 5, thereby reducing the supply temperature of the cooling gas in the second chamber 5 and increasing the service life of the first component 1 and the second component 2.

[0094] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the present invention.

[0095] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0096] In the present invention, unless otherwise clearly specified and defined, the terms "mounted", "connected", "coupled", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection, an electrical connection, or capable of communicating with each other; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0097] In the present invention, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "below" and "beneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0098] In the present invention, the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc., mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, without contradiction, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples.

[0099] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Variations, modifications, substitutions, and alterations made by those of ordinary skill in the art to the above embodiments are all within the scope of protection of the present invention.

Claims

1. A sealing component, characterized in that, Comprising: A first piece and a second piece, both the first piece and the second piece are annular. The first piece is sleeved on the outer side of the second piece to define an annular space. The inner end of the first piece has a first sealing portion, and the outer end of the second piece has a second sealing portion; And An annular plate, which is arranged between the first piece and the second piece to divide the annular space into a first chamber and a second chamber. The outer end of the annular plate has a first fitting portion, and the inner end of the annular plate has a second fitting portion. The first fitting portion is in sealing fit with the first sealing portion to form an outer sealing portion, and the second fitting portion is in sealing fit with the second sealing portion to form an inner sealing portion; Wherein, the number of the outer sealing portions is multiple, and the multiple outer sealing portions are arranged at intervals along the axial direction of the annular plate; and / or the number of the inner sealing portions is multiple, and the multiple inner sealing portions are arranged at intervals along the axial direction of the annular plate; The first sealing portion is a first groove with the notch facing inwards, the first fitting portion is a first protrusion protruding outwards, the first protrusion is inserted into the first groove, and the first protrusion abuts against the groove side wall of the first groove along the axial direction of the annular plate; The second sealing portion is a second groove with the notch facing outwards, the second fitting portion is a second protrusion protruding inwards, the second protrusion is inserted into the second groove, and the second protrusion abuts against the groove side wall of the second groove along the axial direction of the annular plate.

2. The sealing assembly according to claim 1, wherein, The inner end of the first piece has a third sealing portion, and the third sealing portion and the first sealing portion are arranged at intervals along the axial direction of the annular plate. The outer end of the annular plate has a third protrusion protruding outwards, the third protrusion is lower than the first protrusion, and the outer end of the third protrusion is in clearance fit with the third sealing portion; The outer end of the second piece has a fourth sealing portion, and the fourth sealing portion and the second sealing portion are arranged at intervals along the axial direction of the annular plate. The inner end of the annular plate has a fourth protrusion protruding inwards, the fourth protrusion is lower than the second protrusion, and the inner end of the fourth protrusion is in clearance fit with the fourth sealing portion.

3. The sealing assembly according to claim 2, wherein, The annular plate includes: A plate body; A first connecting portion, which is arranged at the outer end of the plate body, and both the first protrusion and the third protrusion are arranged at the outer end of the first connecting portion; and A second connecting portion, which is arranged at the inner end of the plate body, and both the second protrusion and the fourth protrusion are arranged at the inner end of the second connecting portion; Wherein, in the axial direction of the annular plate, the sizes of the first connecting portion and the second connecting portion are both larger than the size of the plate body.

4. The sealing component according to claim 3, characterized in that, The first connecting portion includes a first arc segment, a first straight segment and a second arc segment arranged in sequence from inside to outside. The inner end of the first arc segment is connected to the plate body, the outer end of the second arc segment is connected to the first protrusion, and the third protrusion is arranged on the second arc segment; The second connecting portion includes a third arc segment, a second straight segment, and a fourth arc segment arranged in sequence from outside to inside. The outer end of the third arc segment is connected to the plate body, the inner end of the fourth arc segment is connected to the second protrusion, and the fourth protrusion is arranged on the fourth arc segment.

5. The sealing assembly according to claim 4, characterized in that, At least one of the first arc segment, the second arc segment, the third arc segment, and the fourth arc segment has concave arc surfaces on two surfaces opposite to each other in the axial direction of the annular plate.

6. The sealing assembly according to claim 2, wherein The number of the outer sealing portions is multiple, and the third protrusion is arranged between two adjacent outer sealing portions in the axial direction of the annular plate; The number of the inner sealing portions is multiple, and the fourth protrusion is arranged between two adjacent inner sealing portions in the axial direction of the annular plate.

7. The sealing assembly according to claim 6, characterized in that, The number of the outer sealing portions is two, and the third protrusion is arranged between the two outer sealing portions in the axial direction of the annular plate; The number of the inner sealing portions is two, and the fourth protrusion is arranged between the two inner sealing portions in the axial direction of the annular plate.

8. The sealing assembly according to claim 7, characterized in that, The annular plate is symmetrically arranged along the axial direction of the annular plate.

9. The sealing assembly according to claim 2, wherein The third protrusion and the first protrusion are arranged at intervals in the axial direction of the annular plate, and the surface at the connection between the third protrusion and the adjacent first protrusion is a concave arc surface; The fourth protrusion and the second protrusion are arranged at intervals in the axial direction of the annular plate, and the surface at the connection between the fourth protrusion and the adjacent second protrusion is a concave arc surface.

10. The sealing assembly according to claim 1, wherein, The first protrusion and the bottom wall of the first groove are arranged at intervals in the inner and outer direction; and / or The second protrusion and the bottom wall of the second groove are arranged at intervals in the inner and outer direction.

11. The sealing assembly according to claim 1, characterized in that, The first protrusion has a first mating surface and a second mating surface arranged opposite to each other in the axial direction of the annular plate. Both the first mating surface and the second mating surface are arc surfaces, and the first mating surface and the second mating surface are adapted to axially abut against the side wall of the first groove along the axial direction of the annular plate; The second protrusion has a third mating surface and a fourth mating surface arranged opposite to each other in the axial direction of the annular plate. Both the third mating surface and the fourth mating surface are arc surfaces, and the third mating surface and the fourth mating surface are adapted to axially abut against the side wall of the second groove along the axial direction of the annular plate.

12. The sealing assembly according to claim 11, characterized in that, At least one of the first mating surface, the second mating surface, the third mating surface, and the fourth mating surface is a convex arc surface.

13. A gas turbine, characterized in that, Comprising the sealing assembly according to any one of claims 1-12.

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