Turbine outer ring of gas turbine

Abstract

The invention discloses a gas turbine turbine outer ring which comprises a plurality of outer ring blocks, the multiple outer ring blocks are connected end to end to form the turbine outer ring, sealing grooves are formed in the connecting ends of every two outer ring blocks connected end to end, and the sealing grooves extend in the axial direction of the turbine outer ring; each elastic sealing piece is provided with a first bent section and a second bent section, the first bent sections and the second bent sections are arranged in the sealing grooves of the two outer ring blocks which are connected end to end respectively, the length of the elastic sealing pieces is matched with that of the sealing grooves, and the elastic sealing pieces abut against the inner side walls of the sealing grooves so as to seal the sealing grooves. The cambered surfaces of the first bent sections and the second bent sections are used as sealing surfaces, when the sealing grooves of the two adjacent outer ring blocks relatively displace, even if the positions of the elastic sealing pieces are changed, the cambered surfaces on the bent sections still have parts capable of being in sealing contact with the sealing surfaces in the sealing grooves, and the bent sections have good elasticity, so that the sealing effect is better. And when the elastic sealing piece deforms, a good sealing effect can still be achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of gas turbines, in particular to a gas turbine turbine outer ring. BACKGROUND

[0002] In a gas turbine, the turbine outer ring is mostly an annular structure composed of a plurality of outer ring blocks, and the adjacent outer ring blocks are sealed by using sealing grooves and sealing pieces. When the gas turbine is running, due to thermal deformation, vibration and other reasons, the relative positions of the sealing grooves of the adjacent outer ring blocks may change, causing the sealing pieces to deform, and thus leading to a decline in sealing effect. SUMMARY

[0003] The present application proposes a gas turbine turbine outer ring, aiming to solve the problem in the prior art that when the gas turbine is running, the relative positions of the sealing grooves of the adjacent outer ring blocks may change, causing the sealing pieces to deform, and thus leading to a decline in sealing effect.

[0004] In the embodiments of the present application, a gas turbine turbine outer ring is proposed, comprising:

[0005] A plurality of outer ring blocks, the plurality of outer ring blocks are connected end to end to form a turbine outer ring, and the connecting ends of the two outer ring blocks connected end to end are each provided with a sealing groove, and the sealing groove extends along the axial direction of the turbine outer ring;

[0006] A plurality of elastic sealing pieces, the elastic sealing piece has a first bending section and a second bending section, the first bending section and the second bending section are respectively arranged in the sealing groove of the two outer ring blocks connected end to end, in the axial direction of the turbine outer ring, the length of the elastic sealing piece matches the length of the sealing groove, and in the radial direction of the turbine outer ring, the elastic sealing piece abuts against the inner side wall of the sealing groove to seal the sealing groove.

[0007] In the embodiments of the present application, in the radial direction of the turbine outer ring, the first bending section has a first sealing arc surface and a second sealing arc surface, and the second bending section has a third sealing arc surface and a fourth sealing arc surface;

[0008] In the radial direction of the turbine outer ring, the sealing groove has two opposite sealing surfaces, the first sealing arc surface and the third sealing arc surface abut against the two sealing surfaces of the sealing groove where the first bending section is located, and the third sealing arc surface and the fourth sealing arc surface abut against the two sealing surfaces of the sealing groove where the second bending section is located.

[0009] In the embodiments of the present application, the first sealing arc surface and the second sealing arc surface are integrally bent;

[0010] The third sealing arc surface and the fourth sealing arc surface are integrally bent.

[0011] In the embodiment of the present application, the first connecting section is between the first sealing arc surface and the third sealing arc surface, and in the radial direction of the turbine outer ring, the top surface of the first sealing arc surface and the top surface of the third sealing arc surface are located on the outer side of the first connecting section.

[0012] In the embodiment of the present application, the second connecting section is between the second sealing arc surface and the fourth sealing arc surface, and in the radial direction of the turbine outer ring, the top surface of the second sealing arc surface and the top surface of the fourth sealing arc surface are located on the inner side of the second connecting section.

[0013] In the embodiment of the present application, the first connecting section, the first bending section, the second connecting section and the second bending section are an integral structure.

[0014] In the embodiment of the present application, in the direction from the first bending section to the second bending section, the first connecting section and the second connecting section are both planar.

[0015] In the embodiment of the present application, in the radial direction of the turbine outer ring, there is a gap between the first connecting section and the second connecting section.

[0016] In the embodiment of the present application, in the radial direction of the turbine outer ring, the first connecting section and the second connecting section abut.

[0017] In the embodiment of the present application, the sealing grooves of the two outer ring blocks connected in series are on the same circumference of the turbine outer ring and are symmetric along the end surface of the connecting end of the two outer ring blocks connected in series.

[0018] In the embodiment of the present application, the sealing grooves of the two outer ring blocks connected in series are staggered or inclined.

[0019] In the embodiment of the present application, the turbine outer ring has the first bending section and the second bending section on the elastic sealing piece, and the arc surfaces of the first bending section and the second bending section are used as the sealing surface. When the sealing grooves of the two adjacent outer ring blocks relatively displace, even if the position of the elastic sealing piece changes, the arc surfaces on the bending sections still have positions capable of sealingly contacting the sealing surfaces in the sealing grooves, and the bending structure of the bending sections has good elasticity, so that the elastic sealing piece still has good sealing effect when deformed, thereby ensuring that the gas turbine has good sealing performance during operation. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings described below only illustrate some of the embodiments of the present application, and not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor should be within the scope of protection of the present application.

[0021] Figure 1 A partial exploded view of the outer ring of the gas turbine in an embodiment of the present application.

[0022] Figure 2 A schematic view of the connection of two adjacent outer ring blocks in an embodiment of the present application.

[0023] Figure 3 A sectional view of the connection end of the outer ring block in an embodiment of the present application.

[0024] Figure 4 A sectional view of two adjacent outer ring blocks in an embodiment of the present application.

[0025] Figure 5 A schematic view of the manufacturing of the outer ring of the gas turbine in an embodiment of the present application.

[0026] Explanation of reference signs:

[0027] 100-turbine outer ring, 110-outer ring block, first outer ring block 1101, second outer ring block 1102, 111-seal groove, first seal groove 1111, second seal groove-1112, 1121-first seal surface, 1131-second seal surface, third seal surface-1122, fourth seal surface-1132, 120-elastic seal piece, 121-first bending section, 122-first seal arc surface, 123-second seal arc surface, 124-second bending section, 125-third seal arc surface, 126-fourth seal arc surface, 127-first connecting section, 128-second connecting section.

[0028] The implementation, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor should be within the scope of protection of the present application.

[0030] It should be noted that if the application embodiments have directionality indications (such as up, down, left, right, front, back, etc.), the directionality indications are only used to explain the relative position relationship, movement condition, etc. between components in a certain posture (as shown in the drawings), and if the certain posture changes, the directionality indications also change accordingly.

[0031] In addition, if the application embodiments have descriptions of "first", "second", etc., the "first", "second", etc. descriptions are only for description purposes and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one of the features. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of ordinary skilled in the art, and when the combination of technical solutions contradicts each other or cannot be realized, it should be considered that the combination of technical solutions does not exist and is not within the protection scope claimed by the application.

[0032] As shown in Figure 1 , the application embodiments propose a gas turbine turbine outer ring 100, comprising:

[0033] A plurality of outer ring blocks 110, the plurality of outer ring blocks 110 are connected end to end to form a turbine outer ring 100, and the connecting end of the two outer ring blocks 110 connected end to end is provided with a sealing groove 111, the sealing groove 111 extends along the axial direction of the turbine outer ring 100;

[0034] A plurality of elastic sealing pieces 120, the elastic sealing piece 120 has a first bending section 121 and a second bending section 124, the first bending section 121 and the second bending section 124 are respectively arranged in the sealing groove 111 of the two outer ring blocks 110 connected end to end, in the axial direction of the turbine outer ring 100, the length of the elastic sealing piece 120 matches the length of the sealing groove 111, in the radial direction of the turbine outer ring 100, the elastic sealing piece 120 abuts against the inner side wall of the sealing groove 111 to seal the sealing groove 111.

[0035] The turbine outer ring 100 in the gas turbine refers to the turbine casing, which is located on the periphery of the turbine moving blade, and the turbine outer ring 100 forms the outer boundary of the gas flow passage with the tip of the turbine moving blade, and cooperates with the tip of the turbine moving blade to ensure the air tightness of the turbine.

[0036] As shown in Figure 1 , Figure 2 , Figure 3 , Figure 4As shown in the embodiment of the present application, the turbine outer ring 100 comprises a plurality of outer ring blocks 110, each outer ring block 110 has a circular arc shape, and the two outer ring blocks 110 are connected to form a circular ring-shaped turbine outer ring 100, and the connecting end of each outer ring block 110 is provided with a sealing groove 111. Figure 1 、 Figure 2 、 Figure 4 Only two outer ring blocks 110 connected end to end are shown, including a first outer ring block 1101 on the left and a second outer ring block 1102 on the right, and the connecting end of each outer ring block 110 is provided with a sealing groove 111. Figure 1 、 Figure 2 、 Figure 4 In the orientation shown, the first outer ring block 1101 on the left and the second outer ring block 1102 on the right, the connecting end of the first outer ring block 1101 and the second outer ring block 1102 is the connecting end of each, and the end face of the connecting end of the first outer ring block 1101 and the second outer ring block 1102 can be a plane, the first sealing groove 1111 of the first outer ring block 1101 can extend from the end face of the first outer ring block 1101 to the inside, and the second sealing groove 1112 of the second outer ring block 1102 can extend from the end face of the connecting end of the second outer ring block 1102 to the inside.

[0037] In addition, an elastic sealing piece 120 is arranged between any two outer ring blocks 110 connected end to end, and the two ends of the elastic sealing piece 120 are arranged in the sealing grooves 111 of the two outer ring blocks 110 connected end to end. For example, in the orientation shown in Figure 1 、 Figure 2 、 Figure 4 The left half of the elastic sealing piece 120 is arranged in the first sealing groove 1111 of the first outer ring block 1101 on the left, and the right half of the elastic sealing piece 120 is arranged in the second sealing groove 1112 of the second outer ring block 1102 on the right.

[0038] Continuing to refer to Figure 4 In the embodiment of the present application, the elastic sealing piece 120 has a dumbbell shape with large ends and a small middle, and the two ends have cavities, and the two cavities form a first bending section 121 and a second bending section 124. Figure 4In the shown orientation, the first bent section 121 is arranged in the first sealing groove 1111 of the left first outer ring block 1101, and the second bent section 124 is arranged in the second sealing groove 1112 of the right second outer ring block 1102. In the axial direction of the turbine outer ring 100, the length of the elastic sealing sheet 120 matches the length of the sealing groove 111, which means that the elastic sealing sheet 120 can be installed into the sealing groove 111 in the length direction of the sealing groove 111 without any gap for gas leakage. In the radial direction of the turbine outer ring 100, the first bent section 121 and the second bent section 124 respectively abut against the sealing surfaces of the sealing groove 111 in the radial direction of the two outer ring blocks. After the elastic sealing sheet 120 is arranged at the joint between the head and the tail of each outer ring block 110, each elastic sealing sheet 120 can seal the internal space of the turbine.

[0039] The turbine outer ring 100 in the embodiment of the present application is provided with the first bent section 121 and the second bent section 124 on the elastic sealing sheet 120, and the arc surfaces of the first bent section 121 and the second bent section 124 are used as the sealing surfaces. When the sealing grooves 111 of the adjacent two outer ring blocks 110 relatively displace, even if the position of the elastic sealing sheet 120 changes, the arc surfaces of the bent sections still have positions that can be in sealing contact with the sealing surfaces in the sealing grooves 111. Moreover, the bent structure of the bent sections has good elasticity, and the elastic sealing sheet 120 can still have good sealing effect when deformed, thereby ensuring that the gas turbine has good sealing performance during operation.

[0040] As shown in the drawings, Figure 4 In the embodiment of the present application, the first bent section 121 has a first sealing arc surface 122 and a second sealing arc surface 123 in the radial direction of the turbine outer ring 100, and the second bent section 124 has a third sealing arc surface 125 and a fourth sealing arc surface 125.

[0041] In the radial direction of the turbine outer ring 100, the sealing groove 111 has two opposite sealing surfaces, the first sealing arc surface 122 and the third sealing arc surface 125 abut against the two sealing surfaces of the sealing groove 111 where the first bent section 121 is arranged, and the second sealing arc surface 123 and the fourth sealing arc surface 125 abut against the two sealing surfaces of the sealing groove 111 where the second bent section 124 is arranged.

[0042] As shown in the drawings, Figure 1 , as shown in the drawings, Figure 4As shown, in this embodiment of the application, the sealing groove 111 extends from the end face that can be connected to the outer ring block 110 to the interior of the outer ring block 110. For the first outer ring block 1101, in the radial direction of the turbine outer ring 100, the first outer ring block 1101 includes a first sealing surface 1121 located on the outer side and a second sealing surface 1131 located on the inner side. For the second outer ring block 1102, in the radial direction of the turbine outer ring 100, the second outer ring block 1102 includes a third sealing surface 1122 located on the outer side and a fourth sealing surface 1132 located on the inner side.

[0043] like Figure 4 As shown, in the radial direction of the turbine outer ring 100, the outer side of the first bent section 121 is provided with a first sealing arc surface 122, and the inner side is provided with a second sealing arc surface 123. When the first bent section 121 is installed in the first sealing groove 1111 of the left first outer ring block 1101, the first sealing arc surface 1221 abuts against the first sealing surface 1121 of the first sealing groove 1111, and the second sealing arc surface 123 abuts against the second sealing surface 1131 of the first sealing groove 1111. Similarly, in the radial direction of the turbine outer ring 100, the outer side of the second bent section 124 is provided with a third sealing arc surface 125, and the inner side is provided with a fourth sealing arc surface 126. When the second bent section 124 is installed in the second sealing groove 1112 of the right second outer ring block 1102, the third sealing arc surface 125 abuts against the third sealing surface 1122 of the second sealing groove 1112, and the fourth sealing arc surface 126 abuts against the second sealing surface 1132 of the second sealing groove 1112.

[0044] Continue to refer to Figure 4 ,exist Figure 4 In the indicated orientation, the first sealing arc surface 122 forms a sealing structure with the first sealing surface 1121, the second sealing arc surface 123 forms a sealing structure with the second sealing surface 1131, the third sealing arc surface 125 forms a sealing structure with the third sealing surface 1122, and the fourth sealing arc surface 126 forms a sealing structure with the fourth sealing surface 1132. Thus, the elastic sealing plate 120 can seal the two connected outer ring blocks. Furthermore, the first sealing arc surface 122, the second sealing arc surface 123, the third sealing arc surface 125, and the fourth sealing arc surface 126 are all arc surfaces; that is, each sealing structure is composed of an arc surface and the sealing surface of the sealing groove 111. When the position of the elastic sealing plate 120 changes slightly, each sealing arc surface can still form a sealing structure with the corresponding sealing surface. Moreover, since the arc-shaped sealing arc surfaces also have a certain degree of elasticity, even if each sealing arc surface deforms slightly, it will not affect the sealing effect. Therefore, even if the operation of the gas turbine causes thermal deformation and vibration of each outer ring block, which changes the relative position of the sealing groove 111 of adjacent outer ring blocks, the elastic sealing sheet 120 can still maintain a sealing effect even if it deforms slightly or moves slightly.

[0045] The turbine outer ring 100 in the embodiment of the present application, the elastic sealing piece 120 is provided with the first sealing camber surface 122, the second sealing camber surface 123, the third sealing camber surface 125 and the fourth sealing camber surface 126, when the sealing grooves 111 of the adjacent two outer ring blocks 110 relatively displace, the position of the elastic sealing piece 120 changes accordingly, but the sealing camber surface still has the position capable of sealing with the sealing surface in the sealing groove 111, and the circular arc structure has better elasticity, when the elastic sealing piece 120 deforms, it still has better sealing effect, thereby ensuring that the gas turbine has better sealing property in the running process.

[0046] As shown in the figure, in the embodiment of the present application, the first sealing camber surface 122 and the second sealing camber surface 123 are integrally bent; the third sealing camber surface 125 and the fourth sealing camber surface 126 are integrally bent. Figure 4

[0047] As shown in the figure, the first bending section 121 is integrally bent, the part on the side of the first sealing surface 1121 forms the first sealing camber surface 122, and the part on the side of the second sealing surface 1131 forms the second sealing camber surface 123, the first sealing camber surface 122 is curved towards the side of the second sealing surface 1131, in the radial direction of the turbine outer ring 100, the side of the second sealing camber surface 123 protruding outward is the sealing surface, the second sealing camber surface 123 is curved towards the first sealing surface 1121, in the radial direction of the turbine outer ring 100, the side of the second sealing camber surface 123 protruding inward is the sealing surface. Similarly, the second bending section 124 is integrally bent, the part on the side of the third sealing surface 1122 forms the third sealing camber surface 125, and the part on the side of the fourth sealing surface 1132 forms the fourth sealing camber surface 126, the third sealing camber surface 125 is curved towards the side of the fourth sealing surface 1132, in the radial direction of the turbine outer ring 100, the side of the third sealing camber surface 125 protruding outward is the sealing surface, the fourth sealing camber surface 126 is curved towards the third sealing surface 1122, in the radial direction of the turbine outer ring 100, the side of the fourth sealing camber surface 126 protruding inward is the sealing surface. Figure 4

[0048] ​​By integrally bending the first sealing arc surface 122 and the second sealing arc surface 123, the elasticity of the first bent section 121 can be increased. Similarly, by integrally bending the third sealing arc surface 125 and the fourth sealing arc surface 126, the elasticity of the second bent section 124 can be increased. This not only enhances the sealing effect but also increases the maximum displacement between adjacent sealing grooves 111 and the maximum deformability of the elastic sealing plate 120, thereby adapting to a wider range of gas turbine operating conditions. Furthermore, the integral bending of the first sealing arc surface 122 and the second sealing arc surface 123 creates a cavity structure in the middle, as do the integral bending of the third sealing arc surface 125 and the fourth sealing arc surface 126. This cavity structure further increases elasticity, thereby further enhancing the sealing effect.

[0049] like Figure 4 As shown in this embodiment, a first connecting segment 127 is provided between the first sealing arc surface 122 and the third sealing arc surface 125. In the radial direction of the turbine outer ring 100, the top surface of the first sealing arc surface 122 and the top surface of the third sealing arc surface 125 are located outside the first connecting segment 127.

[0050] like Figure 4 As shown in the embodiment of this application, the first sealing arc surface 122 and the third sealing arc surface 125 can be integrally formed. The part between the first sealing arc surface 122 and the third sealing arc surface 125 is the first connecting segment 127. In the circumferential direction of the turbine outer ring 100, the length of the first connecting segment 127 can be determined based on the depth of the sealing groove 111. When the sealing groove 111 is deeper, the length of the first connecting segment 127 can be increased. When the sealing groove 111 is shallower, the length of the first connecting segment 127 can be shortened. In addition, in the radial direction of the turbine outer ring 100, the top surfaces of the first sealing arc surface 122 and the third sealing arc surface 125 are both located outside the first connecting section 127. The top surface of the first sealing arc surface 122 is the sealing surface between it and the first sealing surface 1121, and the top surface of the third sealing arc surface 125 is the sealing surface between it and the third sealing surface 1122. Thus, in the circumferential direction of the turbine outer ring 100, from the top surface of the first sealing arc surface 122 to the top surface of the third sealing arc surface 125, it needs to extend inward first and then outward, so that the first sealing arc surface 122, the first connecting section 127, and the third sealing arc surface 125 form a continuous arched structure. This results in higher elasticity between the first sealing arc surface 122 and the third sealing arc surface 125, thereby improving the sealing effect. When the relative positions of adjacent sealing grooves 111 change, or when the elastic sealing piece 120 deforms, a good sealing effect can still be achieved.

[0051] like Figure 4As shown in the embodiment of the present application, the second connecting section 128 is between the second sealing arc surface 123 and the fourth sealing arc surface 126, and the top surface of the second sealing arc surface 123 and the top surface of the fourth sealing arc surface 126 are located at the inner side of the second connecting section 128 in the radial direction of the turbine outer ring 100.

[0052] As shown in the embodiment of the present application, the second connecting section 128 is between the second sealing arc surface 123 and the fourth sealing arc surface 126, and the top surface of the second sealing arc surface 123 and the top surface of the fourth sealing arc surface 126 are located at the inner side of the second connecting section 128 in the radial direction of the turbine outer ring 100. Figure 4 As shown in the embodiment of the present application, the second connecting section 128 is between the second sealing arc surface 123 and the fourth sealing arc surface 126, and the top surface of the second sealing arc surface 123 and the top surface of the fourth sealing arc surface 126 are located at the inner side of the second connecting section 128 in the radial direction of the turbine outer ring 100.

[0053] As shown in the embodiment of the present application, the second connecting section 128 is between the second sealing arc surface 123 and the fourth sealing arc surface 126, and the top surface of the second sealing arc surface 123 and the top surface of the fourth sealing arc surface 126 are located at the inner side of the second connecting section 128 in the radial direction of the turbine outer ring 100. Figure 4 As shown in the embodiment of the present application, the second connecting section 128 is between the second sealing arc surface 123 and the fourth sealing arc surface 126, and the top surface of the second sealing arc surface 123 and the top surface of the fourth sealing arc surface 126 are located at the inner side of the second connecting section 128 in the radial direction of the turbine outer ring 100.

[0054] As shown in the embodiment of the present application, the second connecting section 128 is between the second sealing arc surface 123 and the fourth sealing arc surface 126, and the top surface of the second sealing arc surface 123 and the top surface of the fourth sealing arc surface 126 are located at the inner side of the second connecting section 128 in the radial direction of the turbine outer ring 100. Figure 4In the shown orientation, from the top surface of the first sealing arc surface 122 of the elastic sealing sheet 120, it is first bent inwardly to extend to the second sealing arc surface 123, then extends outwardly, transitions through the second connecting section 128, then extends inwardly to the top surface of the fourth sealing arc surface 126, then extends outwardly after bending, extends to the top surface of the third sealing arc surface 125, then extends inwardly, transitions through the first connecting section 127, then extends outwardly to the top surface of the first sealing arc surface 122. Thus, the first sealing arc surface 122, the second sealing arc surface 123, the second connecting section, the fourth sealing arc surface 126, the third sealing arc surface 125 and the first connecting section 127 are integrally connected to form a continuous arch shape, which can improve the elasticity of the elastic sealing sheet 120 as a whole, thereby improving the sealing effect.

[0055] As shown in the drawings, Figure 4 In the embodiment of the present application, the first connecting section 127 and the second connecting section 128 are both planar in the direction from the first bending section 121 to the second bending section 124.

[0056] In the embodiment of the present application, the first connecting section 127 and the second connecting section 128 are both planar in the direction from the first bending section 121 to the second bending section 124.

[0057] As shown in the drawings, Figure 4 In the embodiment of the present application, the first connecting section 127 and the second connecting section 128 have a gap therebetween in the radial direction of the turbine outer ring 100.

[0058] In the embodiment of the present application, the first connecting section 127 and the second connecting section 128 have a gap therebetween in the radial direction of the turbine outer ring 100.

[0059] As shown in the drawings, Figure 1 In the embodiment of the present application, the first connecting section 127 and the second connecting section 128 abut against each other in the radial direction of the turbine outer ring 100.

[0060] In the embodiment of the present application, the first connecting section 127 and the second connecting section 128 abut against each other in the radial direction of the turbine outer ring 100.

[0061] As shown in the drawings, Figure 2 In the embodiment of the present application, the sealing grooves 111 of the two outer ring blocks 110 connected end to end are on the same circumference of the turbine outer ring 100 and are symmetric about the end surface of the connecting end of the two outer ring blocks 110 connected end to end.

[0062] As shown in the drawings,Figure 4 , Figure 5 , ​ As shown, the end face of the connecting end of the outer ring block 110 is a plane. When the two outer ring blocks 110 are connected end to end, the end faces of the connecting ends fit together. The two sealing grooves 111 are symmetrical along the fitted end faces, which facilitates the installation of the elastic sealing sheet 120.

[0063] In another embodiment, the sealing grooves 111 of the two outer ring blocks 110 connected end to end are misaligned or tilted. When the two sealing grooves 111 of the two outer blocks 110 connected end to end are misaligned or tilted, it is sufficient to ensure that the sealing plate abuts against the two sealing grooves 111.

[0064] In addition, such as ​ As shown in the embodiment of this application, the elastic sealing sheet 120 can be made based on a tube. The length of the tube can be determined according to the length of the sealing groove 111 on the axial direction of the turbine outer ring 100, so that the length of the tube is consistent with the length of the sealing groove 111. Then the tube is squeezed towards the middle, so that the first connecting section 127 and the second connecting section 128 are formed in the middle, and the first bending section 121 and the second bending section 124 are formed on the left and right sides.

[0065] In addition, in the embodiments of this application, the material of the elastic sealing sheet 120 can be GH3536 or GH3625 alloy, and the resulting elastic sealing sheet 120 has good elasticity and chemical stability.

[0066] In this embodiment of the application, the turbine outer ring 100 has a first bent section 121 and a second bent section 124 on its elastic sealing plate 120. When the sealing grooves 111 of two adjacent outer ring blocks 110 are relatively displaced, the position of the elastic sealing plate 120 changes accordingly. However, its sealing arc surface still has a part that can seal with the sealing surface in the sealing groove 111. Moreover, the arc structure of the bent section has good elasticity. When the elastic sealing plate 120 is deformed, it can still have a good sealing effect, thereby ensuring that the gas turbine has good sealing performance during operation.

[0067] The above description is merely an optional embodiment of this application and does not limit the patent scope of this application. Any equivalent structural transformations made based on the inventive concept of this application and the contents of the specification and drawings of this application, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this application.

[0068] Based on the above description, the embodiments of this application provide the following technical solutions, but are not limited thereto:

[0069] 1. A gas turbine outer ring, comprising:

[0070] A plurality of outer ring blocks are connected end to end to form a turbine outer ring, and each of the connecting ends of the two outer ring blocks connected end to end is provided with a sealing groove, and the sealing groove extends along the axial direction of the turbine outer ring;

[0071] A plurality of elastic sealing pieces are provided, and the elastic sealing pieces have first bending sections and second bending sections, the first bending sections and the second bending sections are arranged in the sealing grooves of the two outer ring blocks connected end to end, in the axial direction of the turbine outer ring, the length of the elastic sealing piece matches the length of the sealing groove, and in the radial direction of the turbine outer ring, the elastic sealing piece abuts against the inner side wall of the sealing groove to seal the sealing groove.

[0072] 2. The turbine outer ring of claim 1, in the radial direction of the turbine outer ring, the first bending section has a first sealing arc surface and a second sealing arc surface, and the second bending section has a third sealing arc surface and a fourth sealing arc surface;

[0073] In the radial direction of the turbine outer ring, the sealing groove has two opposite sealing surfaces, the first sealing arc surface and the third sealing arc surface abut against the two sealing surfaces of the sealing groove where the first bending section is located, and the third sealing arc surface and the fourth sealing arc surface abut against the two sealing surfaces of the sealing groove where the second bending section is located.

[0074] 3. The turbine outer ring of claim 1 or 2, the first sealing arc surface and the second sealing arc surface are integrally bent;

[0075] The third sealing arc surface and the fourth sealing arc surface are integrally bent.

[0076] 4. The turbine outer ring of any one of claims 1-3, the first sealing arc surface and the third sealing arc surface have a first connecting section therebetween, and in the radial direction of the turbine outer ring, the top surface of the first sealing arc surface and the top surface of the third sealing arc surface are located on the outer side of the first connecting section.

[0077] 5. The turbine outer ring of any one of claims 1-4, the second sealing arc surface and the fourth sealing arc surface have a second connecting section therebetween, and in the radial direction of the turbine outer ring, the top surface of the second sealing arc surface and the top surface of the fourth sealing arc surface are located on the inner side of the second connecting section.

[0078] 6. The turbine outer ring of any one of claims 1-5, the first connecting section, the first bending section, the second connecting section and the second bending section are an integral structure.

[0079] 7. The gas turbine turbine outer ring of any of claims 1-6, wherein the first connecting section and the second connecting section are planar in a direction from the first bend section to the second bend section.

[0080] 8. The gas turbine turbine outer ring of any of claims 1-7, wherein there is a gap between the first connecting section and the second connecting section in a radial direction of the turbine outer ring.

[0081] 9. The gas turbine turbine outer ring of any of claims 1-8, wherein the first connecting section and the second connecting section abut in a radial direction of the turbine outer ring.

[0082] 10. The gas turbine turbine outer ring of any of claims 1-9, wherein the seal grooves of two outer ring blocks connected end to end are symmetrical along end faces of connecting ends of the two outer ring blocks in a same circumference of the turbine outer ring.

[0083] 11. The gas turbine outer ring of any of claims 1-10, wherein the seal grooves of two outer ring blocks connected end to end are staggered or are inclined.

Claims

1. A gas turbine outer ring, characterized in that, include: Multiple outer ring blocks are connected end to end to form a turbine outer ring. The connecting ends of two connected outer ring blocks are provided with sealing grooves, which extend along the axial direction of the turbine outer ring. Multiple elastic sealing plates, each elastic sealing plate having a first bent section and a second bent section, the first bent section and the second bent section being respectively disposed in the sealing grooves of two outer ring blocks connected end to end. In the axial direction of the turbine outer ring, the length of the elastic sealing plate matches the length of the sealing groove. In the radial direction of the turbine outer ring, the elastic sealing plate abuts against the inner sidewall of the sealing groove to seal the sealing groove.

2. The gas turbine outer ring as described in claim 1, characterized in that, In the radial direction of the outer ring of the turbine, the first bend has a first sealing arc surface and a second sealing arc surface, and the second bend has a third sealing arc surface and a fourth sealing arc surface; In the radial direction of the outer ring of the turbine, the sealing groove has two opposing sealing surfaces. The first sealing arc surface and the third sealing arc surface abut against the two sealing surfaces of the sealing groove where the first bending section is located, respectively. The third sealing arc surface and the fourth sealing arc surface abut against the two sealing surfaces of the sealing groove where the second bending section is located, respectively.

3. The gas turbine outer ring as described in claim 1, characterized in that, The first sealing arc surface and the second sealing arc surface are bent together; The third sealing arc surface and the fourth sealing arc surface are bent together.

4. The gas turbine outer ring as described in claim 3, characterized in that, A first connecting section is provided between the first sealing arc surface and the third sealing arc surface. In the radial direction of the turbine outer ring, the top surface of the first sealing arc surface and the top surface of the third sealing arc surface are located outside the first connecting section.

5. The gas turbine outer ring as described in claim 4, characterized in that, A second connecting section is provided between the second sealing arc surface and the fourth sealing arc surface, and the top surfaces of the second sealing arc surface and the fourth sealing arc surface are located inside the second connecting section in the radial direction of the turbine outer ring.

6. The gas turbine outer ring as described in claim 5, characterized in that, The first connecting segment, the first bending segment, the second connecting segment, and the second bending segment are an integral structure.

7. The gas turbine outer ring as described in claim 5, characterized in that, In the direction from the first bend to the second bend, both the first connecting segment and the second connecting segment are planar.

8. The gas turbine outer ring as described in claim 7, characterized in that, In the radial direction of the turbine outer ring, there is a gap between the first connecting segment and the second connecting segment.

9. The gas turbine outer ring as described in claim 7, characterized in that, The first connecting segment and the second connecting segment abut against each other in the radial direction of the outer ring of the turbine.

10. The gas turbine outer ring as described in claim 1, characterized in that, The sealing grooves of the two outer ring blocks connected end to end are on the same circumference of the turbine outer ring and are symmetrical along the end faces of the connecting ends of the two outer ring blocks.

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