Stator component and gas turbine

Abstract

The application discloses a stator component and a gas turbine, and relates to the technical field of gas turbines, in particular to a stator component and a gas turbine. The stator component comprises a stator ring, a sealing element and an elastic element. The stator ring comprises a plurality of arc segments connected in sequence along the circumference of the stator ring. Two adjacent arc segments are a first arc segment and a second arc segment. The first arc segment is provided with a mounting groove at the end of the second arc segment. The opening of the mounting groove faces the second arc segment. The sealing element is arranged in the mounting groove. The sealing element abuts against the end surface of the second arc segment facing the first arc segment. The elastic element is arranged in the mounting groove. The elastic element is used for providing the sealing element with an elastic force facing the second arc segment. The stator component of the application can be maintained without affecting the sealing performance even if the sealing element is deformed, so that the sealing element can be repeatedly used, thereby reducing the maintenance cost of the stator component.

Description

TECHNICAL FIELD

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

[0002] The joint surface of the stator component meets the air tightness requirement by applying bolt pre-tightening force. In order to further improve the sealing ability, a sealing element is usually added at the joint surface, for example, a C-shaped sealing element is arranged at the joint surface. On the one hand, the sealing element has a direction requirement when installed, and there is a problem of inconvenient disassembly and assembly. On the other hand, when the stator component is disassembled for maintenance, the sealing element often cannot be used again due to deformation and other reasons, and needs to be replaced, resulting in high maintenance cost of the stator component. SUMMARY

[0003] The present application provides a stator component to improve the disassembly and assembly convenience of the sealing element and reduce the maintenance cost of the stator component.

[0004] The stator component of the present application comprises a stator ring, a sealing element and an elastic element. The stator ring comprises a plurality of arc segments connected in sequence along the circumference thereof, adjacent two arc segments being a first arc segment and a second arc segment. The first arc segment is provided with a mounting groove at the end portion thereof facing the second arc segment, and the groove opening of the mounting groove faces the second arc segment. The sealing element is arranged in the mounting groove, and the sealing element abuts against the end surface of the second arc segment facing the first arc segment. The elastic element is arranged in the mounting groove, and the elastic element is used to provide the sealing element with an elastic force facing the second arc segment.

[0005] Optionally, a first limiting portion is arranged in the mounting groove, and the sealing element is provided with a second limiting portion which abuts against the first limiting portion in the direction facing the second arc segment.

[0006] Optionally, the mounting groove comprises a first groove segment and a second groove segment, the second groove segment is arranged between the first groove segment and the second arc segment in the circumferential direction of the stator ring, the width of the first groove segment is greater than the width of the second groove segment, and the end surface of the first groove segment facing away from the second arc segment forms the first limiting portion. The sealing element comprises a first sealing segment and a second sealing segment, the first sealing segment is arranged in the first groove segment, and the second sealing segment is arranged in the second groove segment. The width of the first sealing segment is greater than the width of the second groove segment, and the end surface of the first sealing segment facing the second arc segment forms the second limiting portion.

[0007] Optionally, the width of the first sealing segment is less than the width of the first groove segment; and / or, the width of the second sealing segment is less than the width of the second groove segment.

[0008] Optionally, the sealing member is provided with a receiving groove, and the elastic member is arranged in the receiving groove.

[0009] Optionally, the elastic member is a compression spring, and the groove opening of the receiving groove faces away from the second arc segment.

[0010] Optionally, the sealing member has an abutting surface facing the second arc segment, the abutting surface abuts against an end surface of the second arc segment facing the first arc segment, and the abutting surface is a convex arc surface.

[0011] Optionally, an end surface of the first arc segment facing the second arc segment abuts against an end surface of the second arc segment facing the first arc segment.

[0012] Optionally, the sealing member is a metal member.

[0013] The application further provides a gas turbine.

[0014] The gas turbine of the application comprises a stator component and a rotor component, the stator component is any one of the stator components described above, and the rotor component is rotationally connected with the stator component.

[0015] The stator component of the application realizes the sealing at the joint surface of the first arc segment and the second arc segment by arranging a mounting groove at an end of the first arc segment facing the second arc segment, arranging the groove opening of the mounting groove to face the second arc segment, and arranging a sealing member and an elastic member in the mounting groove, and applying the elastic force of the elastic member to the sealing member to make the sealing member abut against an end surface of the second arc segment facing the first arc segment. On the one hand, the installation of the sealing member has no direction requirement, and the disassembly and assembly of the sealing member are convenient; on the other hand, the sealing member is sealed by the elastic force applied by the elastic member, so that even if the sealing member is deformed, the sealing performance will not be affected when the stator component is overhauled, which makes the sealing member reusable, thereby reducing the overhauling cost of the stator component. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a partial sectional view of the stator component of one embodiment of the application.

[0017] Figure 2 is a partial sectional view of the stator component of one embodiment of the application, in which the first arc segment, the sealing member and the elastic member are assembled together.

[0018] Reference signs:

[0019] 1, first arc segment; 11, mounting groove; 111, first groove segment; 112, second groove segment; 12, first sealing surface; 101, first limiting portion;

[0020] 2, second arc segment; 21, second sealing surface;

[0021] 3, seal; 31, first sealing section; 32, second sealing section; 33, abutting surface; 34, accommodating groove; 301, second limiting portion;

[0022] 4, elastic member. DETAILED DESCRIPTION

[0023] Embodiments of the present application are described in detail below with reference to the accompanying drawings. The embodiments described below by way of example with reference to the accompanying drawings are intended to explain the present application and are not to be understood as limiting the present application.

[0024] As shown in Figure 1 and Figure 2 The stator component of the embodiment of the present application includes a stator ring, a seal 3 and an elastic member 4, the stator ring includes a plurality of arc sections connected in sequence along the circumference thereof. The two adjacent arc sections are a first arc section 1 and a second arc section 2, respectively. The first arc section 1 is provided with a mounting groove 11 at the end thereof facing the second arc section 2, and the opening of the mounting groove 11 faces the second arc section 2. The seal 3 is arranged in the mounting groove 11, and the seal 3 abuts against the end surface of the second arc section 2 facing the first arc section 1. The elastic member 4 is arranged in the mounting groove 11, and the elastic member 4 is used to provide the seal 3 with an elastic force facing the second arc section 2.

[0025] The stator component can be a cylinder, a stator vane holder ring, etc. of a gas turbine.

[0026] For example, the stator ring includes two arc sections, which are the first arc section 1 and the second arc section 2, respectively. The first arc section 1 and the second arc section 2 are both semicircular arcs, and the first arc section 1 and the second arc section 2 are connected in sequence to form a ring. Alternatively, the stator ring includes three or more arc sections, and the radian of each arc section is less than 180°.

[0027] The stator component of the embodiment of the present application is provided with the mounting groove 11 at the end of the first arc section 1 facing the second arc section 2, and the opening of the mounting groove 11 faces the second arc section 2. The seal 3 and the elastic member 4 are arranged in the mounting groove 11. The elastic member 4 is used to apply an elastic force to the seal 3 facing the second arc section 2, so that the seal 3 abuts against the end surface of the second arc section 2 facing the first arc section 1, thereby realizing the sealing at the joint surface of the first arc section 1 and the second arc section 2. On the one hand, the installation of the seal 3 has no direction requirement, so that the disassembly and assembly of the seal 3 are convenient. On the other hand, the seal 3 relies on the elastic force applied to it by the elastic member 4 to realize the sealing, so that even if the seal 3 is deformed during the maintenance of the stator component, the sealing performance will not be affected. This makes the seal 3 reusable, thereby reducing the maintenance cost of the stator component.

[0028] Optionally, as shown in Figure 1As shown, the end face of the first arc segment 1 facing the second arc segment 2 abuts against the end face of the second arc segment 2 facing the first arc segment 1.

[0029] For example, such as Figure 1 and Figure 2 As shown, the end face of the first arc segment 1 facing the second arc segment 2 is the first sealing surface 12, and the end face of the second arc segment 2 facing the first arc segment 1 is the second sealing surface 21. The first sealing surface 12 abuts against the second sealing surface 21.

[0030] By abutting the end face of the first arc segment 1 toward the second arc segment 2 against the end face of the second arc segment 2 toward the first arc segment 1, a seal can be achieved between the first arc segment 1 and the second arc segment 2, thereby improving the sealing reliability between the first arc segment 1 and the second arc segment 2.

[0031] Optionally, such as Figure 1 As shown, the mounting groove 11 is provided with a first limiting part 101, and the sealing member 3 is provided with a second limiting part 301. The second limiting part 301 abuts against the first limiting part 101 in the direction toward the second arc segment 2.

[0032] By stopping the second limiting part 301 against the first limiting part 101 in the direction toward the second arc segment 2, the first limiting part 101 and the second limiting part 301 can be used to restrict the seal 3 from coming out of the mounting groove 11, that is, to restrict the seal 3 within the mounting groove 11.

[0033] Therefore, when installing the seal 3, the seal 3 and the elastic element 4 can be first installed in the mounting groove 11 of the first arc segment 1, and the seal 3 can be restricted within the mounting groove 11 by the first limiting part 101 and the second limiting part 301, thus achieving pre-fixation of the seal 3; then, the first arc segment 1 and the second arc segment 2 are connected. This facilitates the installation of the seal 3 and improves the ease of installation.

[0034] Optionally, such as Figure 2 As shown, the mounting groove 11 includes a first groove segment 111 and a second groove segment 112. The second groove segment 112 is located circumferentially between the first groove segment 111 and the second arc segment 2 of the stator ring. The opening of the mounting groove 11 is located in the second groove segment 112. The width of the first groove segment 111 is greater than the width of the second groove segment 112. The end face of the first groove segment 111 facing away from the second arc segment 2 forms a first limiting part 101. The sealing element 3 includes a first sealing segment 31 and a second sealing segment 32. The first sealing segment 31 is located within the first groove segment 111, and the second sealing segment 32 is located within the second groove segment 112. The width of the first sealing segment 31 is greater than the width of the second groove segment 112. The end face of the first sealing segment 31 facing the second arc segment 2 forms a second limiting part 301.

[0035] Wherein, the width of the first groove segment 111 can be the radial dimension of the first groove segment 111 in the stator ring, the width of the second groove segment 112 can be the radial dimension of the first groove segment 111 in the stator ring, the width of the first sealing segment 31 can be the radial dimension of the first groove segment 111 in the stator ring, and the width of the second sealing segment 32 can be the radial dimension of the first groove segment 111 in the stator ring; or, the width of the first groove segment 111 can be the axial dimension of the first groove segment 111 in the stator ring, the width of the second groove segment 112 can be the axial dimension of the first groove segment 111 in the stator ring, the width of the first sealing segment 31 can be the axial dimension of the first groove segment 111 in the stator ring, and the width of the second sealing segment 32 can be the axial dimension of the first groove segment 111 in the stator ring.

[0036] By placing the first sealing section 31 within the first groove section 111 and the second sealing section 32 within the second groove section 112, with the width of the first groove section 111 greater than the width of the second groove section 112, and the width of the first sealing section 31 greater than the width of the second groove section 112, the first sealing section 31 abuts against the end face of the second arc section 2 in the direction towards the second arc section 2, while the end face of the first groove section 111 faces away from the second arc section 2. This prevents the first sealing section 31 from detaching from the first groove section 111, thus confining the seal 3 within the mounting groove 11.

[0037] Therefore, when installing the seal 3, the seal 3 is pre-fixed by installing the first sealing section 31 in the first groove section 111 and the second sealing section 32 in the second groove section 112. The above-mentioned dimensional design of the mounting groove 11 and the seal 3 facilitates the processing and manufacturing of the mounting groove 11 and the seal 3, and helps to reduce the cost of the stator components.

[0038] Of course, in other embodiments, the width of the mounting groove 11 can be equal everywhere, and correspondingly, the width of the seal 3 can be equal everywhere. A limiting boss can be provided in the mounting groove 11, and a limiting groove can be provided on the seal 3. By inserting the limiting boss into the limiting groove, the seal 3 is restricted within the mounting groove 11. The limiting boss forms the first limiting part 101, and the limiting groove forms the second limiting part 301.

[0039] When machining the stator components, a connecting groove that communicates with the mounting groove 11 can be provided in the first arc segment 1. The connecting groove penetrates the first arc segment 1 radially or axially. For example, the connecting groove penetrates the outer circumferential surface of the first arc segment 1 radially. The seal 3 slides into the mounting groove 11 through the connecting groove, and then the connecting groove is sealed with a plug.

[0040] Optionally, such as Figure 2 As shown, the width of the first sealing section 31 is smaller than the width of the first groove section 111.

[0041] By setting the width of the first sealing section 31 to be less than the width of the first groove section 111, a gap is formed between the first sealing section 31 and the first groove section 111, so that a large friction force between the first sealing section 31 and the first groove section 111 is avoided.

[0042] Thus, on the one hand, the first sealing section 31 and the first groove section 111 are prevented from being worn due to friction when the sealing member 3 moves in the direction of the second arc section 2 under the elastic force of the elastic member 4, which affects the reliability of the stator component; on the other hand, the friction force between the first sealing section 31 and the first groove section 111 is prevented from being large, so that the sealing member 3 can move only when a large elastic force is applied to the sealing member 3 by the elastic member 4, which reduces the requirement for the elastic force of the elastic member 4 and is conducive to reducing the cost of the stator component.

[0043] Of course, in other embodiments, the first sealing section 31 and the first groove section 111 can also be gap-fitted.

[0044] Optionally, as shown in Figure 2 the width of the second sealing section 32 is less than the width of the second groove section 112.

[0045] By setting the width of the second sealing section 32 to be less than the width of the second groove section 112, a gap is formed between the second sealing section 32 and the second groove section 112, so that a large friction force between the second sealing section 32 and the second groove section 112 is avoided.

[0046] Thus, on the one hand, the second sealing section 32 and the second groove section 112 are prevented from being worn due to friction when the sealing member 3 moves in the direction of the second arc section 2 under the elastic force of the elastic member 4, which affects the reliability of the stator component; on the other hand, the friction force between the second sealing section 32 and the second groove section 112 is prevented from being large, so that the sealing member 3 can move only when a large elastic force is applied to the sealing member 3 by the elastic member 4, which reduces the requirement for the elastic force of the elastic member 4 and is conducive to reducing the cost of the stator component.

[0047] Of course, in other embodiments, the second sealing section 32 and the second groove section 112 can also be gap-fitted.

[0048] In order to make the technical solutions of the present application easier to be understood, the following will further describe the technical solutions of the present application by taking the first arc section 1 and the second arc section 2 as circular arc sections and the first arc section 1 being arranged on the upper side of the second arc section 2 as an example. The up-down direction is as shown in Figure 1 and Figure 2

[0049] ​The lower end surface of the first arc segment 1 is a first sealing surface 12, and the upper end surface of the second arc segment 2 is a second sealing surface 21. The slot of the mounting groove 11 faces downward, and the sealing member 3 and the elastic member 4 are arranged in the mounting groove 11. The elastic member 4 is used to provide a downward elastic force to the sealing member 3, and the lower end of the sealing member 3 abuts against the second sealing surface 21. At this time, the sealing member 3 abuts against the second sealing surface 21 under the action of its own gravity and the elastic force of the elastic member 4.

[0050] Optionally, as shown in Figure 1 and Figure 2 , the sealing member 3 is provided with a receiving groove 34, and the elastic member 4 is arranged in the receiving groove 34.

[0051] By arranging the elastic member 4 in the receiving groove 34, the space in the mounting groove 11 occupied by the elastic member 4 can be avoided, so that the size of the mounting groove 11 can be reduced, the structural strength of the stator component can be improved, and the reliability of the stator component can be improved.

[0052] Optionally, as shown in Figure 1 and Figure 2 , the elastic member 4 is a compression spring, and the slot of the receiving groove 34 faces away from the second arc segment 2.

[0053] For example, as shown in Figure 1 and Figure 2 , the slot of the receiving groove 34 faces upward.

[0054] When installing the sealing member 3, the elastic member 4 is first turned into the receiving groove 34; then the sealing member 3 is installed in the mounting groove 11, and the bottom wall of the mounting groove 11 is used to limit the elastic member 4 from being pulled out of the receiving groove 34, so as to realize the pre-fixing of the elastic member 4; and then the first arc segment 1 and the second arc segment 2 are connected. Thus, the installation of the elastic member 4 is facilitated, and the installation convenience of the sealing member 3 is further improved.

[0055] Optionally, as shown in Figure 1 and Figure 2 , the sealing member 3 has an abutting surface 33 facing the second arc segment 2, and the abutting surface 33 abuts against the end surface of the second arc segment 2 facing the first arc segment 1. The abutting surface 33 is a convex arc surface.

[0056] It can be understood that due to the existence of machining errors and assembly errors, if the abutting surface 33 is a flat surface, the abutting surface 33 will only partially contact the end surface of the second arc segment 2 facing the first arc segment 1, and the contact position of the abutting surface 33 with the second arc segment 2 cannot be controlled.

[0057] By arranging the abutting surface 33 as a convex arc surface, the highest point of the abutting surface 33 can be ensured to contact the second arc segment 2, so as to control the contact position of the abutting surface 33 with the second arc segment 2, which is beneficial to improve the sealing reliability of the sealing member 3.

[0058] Optionally, the sealing member 3 is a metal member.

[0059] By setting the sealing member 3 as a metal member, the service life of the sealing member 3 is prolonged.

[0060] The assembling method of the stator component of the embodiment of the present application:

[0061] First, the elastic member 4 is installed in the accommodating groove 34 of the sealing member 3; then, the sealing member 3 with the elastic member 4 is installed in the installation groove 11 of the first arc segment 1, at this time, under the elastic force of the elastic member 4, a part of the sealing member 3 protrudes from the slot of the installation groove 11; after that, the first arc segment 1 is connected with the second arc segment 2, at this time, under the elastic force of the elastic member 4, the sealing member 3 abuts against the end surface of the second arc segment 2 facing the first arc segment 1, that is, the sealing member 3 is in contact sealing with the second arc segment 2.

[0062] The gas turbine of the embodiment of the present application comprises the stator component and a rotor component, the stator component is the stator component described in any of the above embodiments, and the rotor component is rotationally connected with the stator component.

[0063] The rotor component comprises a blade.

[0064] Since the maintenance cost of the above stator component is low, the maintenance cost of the gas turbine of the embodiment of the present application is low.

[0065] Although the embodiments of the present application have been shown and described above, it should be understood that the above embodiments are exemplary and should not be construed as limiting the present application, and the changes, modifications, replacements and variations of the above embodiments made by those of ordinary skill in the art are within the protection scope of the present application.

Claims

1. A stator component, characterized by, The stator ring comprises a plurality of arc segments connected in sequence along the circumference thereof, and two adjacent arc segments are a first arc segment and a second arc segment. A sealing member is arranged in the mounting groove and abuts against the end surface of the second arc segment facing the first arc segment. An elastic member is arranged in the mounting groove and used to provide the sealing member with an elastic force towards the second arc segment. The sealing member has an abutting surface facing the second arc segment, which abuts against the end surface of the second arc segment facing the first arc segment, and the abutting surface is a convex arc surface. A first limiting portion is arranged in the mounting groove, and the sealing member has a second limiting portion which abuts against the first limiting portion in the direction towards the second arc segment.

2. The stator component of claim 1, wherein The mounting groove comprises a first groove segment and a second groove segment, the second groove segment is arranged between the first groove segment and the second arc segment in the circumferential direction of the stator ring, the width of the first groove segment is greater than the width of the second groove segment, and the end surface of the first groove segment facing away from the second arc segment forms the first limiting portion.

3. The stator component of claim 2, wherein, The sealing member comprises a first sealing segment and a second sealing segment, the first sealing segment is arranged in the first groove segment, the second sealing segment is arranged in the second groove segment, the width of the first sealing segment is greater than the width of the second groove segment, and the end surface of the first sealing segment facing the second arc segment forms the second limiting portion. The width of the first sealing segment is less than the width of the first groove segment; and / or 4. The stator component of claim 3, wherein The width of the second sealing segment is less than the width of the second groove segment. The sealing member is provided with a containing groove, and the elastic member is arranged in the containing groove.

5. The stator component of any of claims 1-4, wherein, The elastic member is a compression spring, and the containing groove has a groove opening facing away from the second arc segment.

6. The stator component of claim 5, wherein, The end surface of the first arc segment facing the second arc segment abuts against the end surface of the second arc segment facing the first arc segment.

7. The stator component of any of claims 1-4, wherein, The sealing member is a metal member.

8. The stator component of any of claims 1-4, wherein, The stator component is the stator component according to any one of claims 1-8.

9. A gas turbine engine characterized by, The rotor component comprises a blade. ​ ​

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