Extrusion type sealing structure for gas turbine

Abstract

The utility model provides an extrusion type sealing structure for a gas turbine, belongs to the field of gas turbine sealing structures, and aims to solve the problem that an existing sealing structure for the gas turbine cannot be conveniently and stably disassembled and overhauled. A mounting groove is formed in the combustion cylinder body, a sleeve is arranged in the mounting groove, an oil return pipe is arranged in the sleeve, a fixing plate is welded and fixed to the combustion cylinder body, a first spring is welded and fixed to the fixing plate, a connecting plate is welded and fixed to the other end of the first spring, and a clamping rod is welded and fixed to the connecting plate. Through the arranged clamping rods and clamping grooves, clamping mounting and dismounting work of the sealing structure can be conveniently completed, then convenience of follow-up overhaul maintenance and replacement work of the sealing structure can be guaranteed, the service life of the sealing structure can be effectively prolonged, and the situation that after the sealing structure is used for a long time, the sealing performance is reduced, and the service life of the sealing structure is prolonged is avoided. The normal work of the gas turbine is influenced.

Description

Technical Field

[0001] The utility model relates to the field of gas turbine sealing structures, in particular to an extrusion type sealing structure for a gas turbine. Background Art

[0002] A gas turbine is an engine that uses high-temperature, high-pressure gas generated by the combustion of fuel (usually natural gas or oil) to drive turbomachinery. It is widely used in aviation, power generation, ship propulsion, and industry. Since the bearing return oil pipe of the gas turbine needs to pass through the lower combustion cylinder from the bearing seat, in order to prevent the high-temperature fuel gas of the compressor from having a significant impact on the return oil temperature of the bearing, a protective sleeve needs to be added to the oil return pipe. The protective sleeve also passes through the lower cylinder, and a sealing structure needs to be used between the sleeve and the lower cylinder for sealing protection.

[0003] However, there are some problems in the actual working process of the existing gas turbine sealing structure. For example, the gas turbine anti-leakage sealing structure with publication number CN219974636U can prevent leakage by squeezing the graphite packing during operation. However, it is installed and fixed by multiple bolts. After long-term use, it cannot be disassembled and repaired conveniently and stably, and its practicality is poor. Moreover, it is also impossible to replace the graphite packing seal after long-term use conveniently and stably, resulting in a short service life of the sealing structure. Therefore, we have made improvements to this and proposed an extrusion sealing structure for gas turbines. Utility Model Content

[0004] The purpose of the utility model is to address the problems that the existing gas turbine sealing structure cannot be disassembled and repaired conveniently and stably, and the sealing parts cannot be replaced conveniently and stably after long-term use.

[0005] In order to achieve the above objectives, the present invention provides the following technical solutions:

[0006] An extrusion seal structure is used for a gas turbine to improve the above problems.

[0007] The specific application is as follows:

[0008] The cam is fixedly mounted on the support frame, and the support frame is fixedly provided with a toothed connecting strip which is cooperatively connected with the toothed connecting strip.

[0009] As the preferred technical solution of this application, the fixing plates are symmetrically distributed on the front and rear sides of the mounting groove, the mounting plates are symmetrically distributed on the left and right sides of the mounting groove, the mounting plates on both sides are fitted together, the mounting plates and the combustion cylinder body are fitted together, and the clamping rods are symmetrically distributed on both sides of the fixing plates.

[0010] As a preferred technical solution of the present application, the threaded rods are symmetrically distributed on both sides of the mounting plate, and the rubber pads, connecting plates and rubber blocks are all in the shape of semicircular rings.

[0011] As a preferred technical solution of the present application, the positioning groove is provided in the middle portion of the connecting plate, and the connecting plate is fitted with the rubber block.

[0012] As a preferred technical solution of the present application, the positioning rod is fixed in the middle part of the rubber block, the length of the positioning rod is greater than the thickness of the connecting plate, and the cross-section of the positioning rod and the cross-section of the positioning groove are both rectangular.

[0013] As a preferred technical solution of the present application, the second springs are symmetrically distributed on both sides of the positioning rod, the second springs correspond one-to-one to the stoppers, and the end cross-section of the stoppers is a right-angled trapezoid.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] In the scheme of this application:

[0016] 1. The provided clamping rod and clamping slot facilitate the installation and removal of the sealing structure, thereby ensuring the convenience of subsequent inspection, maintenance and replacement of the sealing structure, thereby effectively extending the service life of the sealing structure and avoiding the problem of the sealing performance of the sealing structure being reduced after long-term use, which affects the normal operation of the gas turbine;

[0017] 2. By rotating the threaded rod, the connecting plate can push and squeeze the rubber block, thereby achieving a convenient and stable extrusion seal at the connection between the sleeve and the combustion cylinder, effectively improving the sealing effect;

[0018] 3. By setting the positioning rod and the stop block, the rubber block can be easily installed and disassembled, and the rubber block can be replaced independently, which further improves the service life of the sealing structure, reduces the maintenance cost of the sealing mechanism, and increases the diversity and convenience of the use of the sealing structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the extrusion seal structure for a gas turbine provided in this application;

[0020] Figure 2 This is a schematic diagram of the overall main cross-sectional structure of the extrusion seal structure for a gas turbine provided in this application;

[0021] Figure 3 This is a schematic side view of the overall structure of the extrusion seal structure for a gas turbine provided by the present application;

[0022] Figure 4 A schematic diagram of a top view of the mounting plate of the extrusion seal structure for a gas turbine provided in this application;

[0023] Figure 5 The extrusion seal structure for a gas turbine provided in this application Figure 4 A in the middle is an enlarged structural diagram;

[0024] Figure 6 A schematic diagram of a top view of the connecting plate of the extrusion seal structure for a gas turbine provided in this application;

[0025] Figure 7 A schematic side cross-sectional view of a connecting plate of an extrusion seal structure for a gas turbine provided in this application;

[0026] Figure 8 The extrusion seal structure for a gas turbine provided in this application Figure 7 Enlarged structural diagram of headquarters B.

[0027] Markings in the figure: 1. Combustion cylinder; 2. Mounting groove; 3. Sleeve; 4. Oil return pipe; 5. Fixing plate; 6. First spring; 7. Connecting plate; 8. Clamping rod; 9. Mounting plate; 10. Clamping groove; 11. Rubber pad; 12. Threaded rod; 13. Connecting plate; 14. Positioning groove; 15. Rubber block; 16. Positioning rod; 17. Second spring; 18. Stop block. DETAILED DESCRIPTION

[0028] To make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be described clearly and completely in conjunction with the accompanying drawings. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of them.

[0029] Therefore, the following detailed description of the embodiments of the present invention is not intended to limit the scope of the claimed invention, but merely represents some embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0030] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features and technical solutions therein can be combined with each other.

[0031] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0032] In the description of this utility model, it should be noted that the terms "upper" and "lower" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or the orientations or positional relationships in which the product is typically placed when in use, or the orientations or positional relationships commonly understood by those skilled in the art. Such terms are intended solely to facilitate the description of this utility model and simplify the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" and the like are used solely for distinction and description and should not be construed as indicating or implying relative importance.

[0033] Example 1:

[0034] like Figures 1-8As shown, this embodiment proposes an extrusion seal structure for a gas turbine, including a combustion cylinder 1 and a mounting plate 9. The combustion cylinder 1 is provided with a mounting groove 2, a sleeve 3 is provided in the mounting groove 2, and an oil return pipe 4 is provided in the sleeve 3. A fixing plate 5 is welded and fixed to the combustion cylinder 1, a first spring 6 is welded and fixed to the fixing plate 5, and a connecting plate 7 is welded and fixed to the other end of the first spring 6. A clamping rod 8 is welded and fixed to the connecting plate 7, and the clamping rod 8 is slidably connected to the fixing plate 5. The mounting plate 9 is provided with a mounting groove 2. A card slot 10 is provided, a rubber pad 11 is fixedly connected to the mounting plate 9, a threaded rod 12 is threadedly connected to the mounting plate 9, the end of the threaded rod 12 is rotatably connected to the connecting plate 13, a positioning groove 14 is penetrated through the connecting plate 13, a positioning rod 16 is slidingly connected in the positioning groove 14, a rubber block 15 is fixedly connected to the end of the positioning rod 16, a second spring 17 is welded and fixed in the positioning rod 16, and a stopper 18 is welded and fixed at the other end of the second spring 17, and the stopper 18 is slidably connected in the positioning rod 16.

[0035] Example 2:

[0036] The solution in Example 1 is further introduced below in conjunction with a specific working method, as described below:

[0037] like Figure 1-Figure 5 As shown, as a preferred embodiment, on the basis of the above method, further, the fixing plates 5 are symmetrically distributed on the front and rear sides of the mounting groove 2, the mounting plates 9 are symmetrically distributed on the left and right sides of the mounting groove 2, the mounting plates 9 on both sides fit each other, the mounting plates 9 and the combustion cylinder body 1 fit each other, and the clamping rods 8 are symmetrically distributed on both sides of the fixing plate 5. By utilizing the cooperation of the clamping rods 8 and the clamping grooves 10, the clamping installation and disassembly work of the sealing structure can be completed conveniently, thereby ensuring the convenience of subsequent inspection, maintenance and replacement of the sealing structure, thereby effectively improving the service life of the sealing structure.

[0038] like Figure 1-Figure 4 、 Figure 6 and Figure 7 As shown, as a preferred embodiment, on the basis of the above method, further, the threaded rod 12 is symmetrically distributed on both sides of the mounting plate 9, the rubber pad 11, the connecting plate 13 and the rubber block 15 are all semi-circular, and the positioning groove 14 is opened in the middle part of the connecting plate 13. The connecting plate 13 fits with the rubber block 15. By rotating the threaded rod 12, the connecting plate 13 can push and squeeze the rubber block 15, and then the connection between the sleeve 3 and the combustion cylinder 1 can be conveniently and stably extruded and sealed, which effectively improves the sealing effect.

[0039] like Figure 2 and Figure 5-Figure 8As shown, as a preferred embodiment, on the basis of the above method, further, the positioning rod 16 is fixed to the middle part of the rubber block 15, the length of the positioning rod 16 is greater than the thickness of the connecting plate 13, the cross section of the positioning rod 16 and the cross section of the positioning groove 14 are both rectangular, and the second spring 17 is symmetrically distributed on both sides of the interior of the positioning rod 16, the second spring 17 corresponds to the stop block 18 one by one, and the end cross section of the stop block 18 is a right-angled trapezoid. By utilizing the cooperation of the positioning rod 16 and the stop block 18, the engagement, installation and disassembly of the rubber block 15 can be conveniently completed, and then the replacement of the rubber block 15 can be completed separately, further improving the service life of the sealing structure and reducing the maintenance cost of the sealing mechanism.

[0040] Specifically, when the extrusion sealing structure for a gas turbine is in use: first, the staff needs to pull the connecting plate 7 away from the fixing plate 5, and then the staff can splice the two mounting plates 9 together, and insert the rubber blocks 15 at the two mounting plates 9 into the upper ends of the connection between the sleeve 3 and the combustion cylinder 1, and then the staff can loosen the connecting plate 7. At this time, under the elastic action of the first spring 6, the connecting plate 7 can be driven to move and reset. At the same time, under the movement and reset action of the connecting plate 7, the clamping rods 8 on both sides can be driven to automatically engage with the clamping grooves 10 on the sides of the two mounting plates 9. At this time, under the clamping action of each clamping rod 8 and the corresponding clamping groove 10, the clamping and installation work of the two mounting plates 9 can be completed conveniently. Then the staff installs the other two mounting plates 9 at the lower ends of the connection between the sleeve 3 and the combustion cylinder 1 through the same operation;

[0041] Then, the staff can simultaneously rotate the threaded rods 12 on both sides of the mounting plate 9. Under the action of the simultaneous rotation of the threaded rods 12 on both sides, the upper connecting plate 13 can be pushed downward. Similarly, by simultaneously rotating the two threaded rods 12 on the lower side, the lower connecting plate 13 can be pushed upward. At this time, under the action of the movement of the upper and lower connecting plates 13, the corresponding rubber blocks 15 can be pushed toward the middle and squeezed against each other. At this time, under the mutual squeezing action of the rubber blocks 15, the connection between the sleeve 3 and the combustion cylinder 1 can be conveniently and stably squeezed and sealed, effectively improving the sealing effect.

[0042] After the sealing structure has been used for a long time, the staff can reduce the squeezing force between the upper and lower rubber blocks 15 by rotating the threaded rod 12 in the opposite direction, thereby reducing the friction between the rubber block 15 and the sealing connection. Then the staff can pull the connecting plate 7 away from the fixed plate 5 again. At this time, the connecting plate 7 can drive the clamping rods 8 on both sides to move out of the corresponding clamping grooves 10. At this time, the mounting plate 9 can be disassembled and separated conveniently and stably, completing the overall disassembly of the sealing structure.

[0043] Then the staff can push the blocks 18 on both sides of the positioning rod 16 to move toward the middle until the blocks 18 on both sides move into the positioning rod 16. At this time, the positioning rod 16 loses its obstruction, and the rubber block 15 is enough to drive the positioning rod 16 to move out of the positioning groove 14 on the connecting plate 13, thereby conveniently completing the removal of the rubber block 15 and replacing the rubber block 15 separately. Then the staff can insert the positioning rod 16 on the new rubber block 15 into the positioning groove 14 on the connecting plate 13. During the insertion of the positioning rod 16, the connecting plate 13 is first When the stopper 18 is in contact with the inclined surface on the stopper 18, under the guidance of the inclined surface at the end of the stopper 18, the stopper 18 can be pushed by the connecting plate 13 to automatically move into the positioning rod 16 during the insertion process of the positioning rod 16, until the positioning rod 16 drives the stopper 18 to pass through the positioning groove 14 on the connecting plate 13. At this time, under the elastic action of the second spring 17, the stopper 18 can be driven to automatically move outward and reset. At this time, under the cooperation of the positioning rod 16 and the stoppers 18 on both sides, the engagement and installation of the rubber block 15 can be completed conveniently, thereby ensuring the stability of the subsequent working state of the rubber block 15.

[0044] The above embodiments are only used to illustrate the present invention and are not intended to limit the technical solutions described in the present invention. Although this specification has described the present invention in detail with reference to the above embodiments, the present invention is not limited to the above specific implementation methods. Therefore, any modification or equivalent replacement of the present invention; and all technical solutions and improvements that do not deviate from the spirit and scope of the utility model are included in the scope of the claims of the present invention.

Claims

1. An extrusion seal structure for a gas turbine, comprising a combustion cylinder (1) and a mounting plate (9), characterized in that: The combustion cylinder (1) is provided with a mounting groove (2), a sleeve (3) is provided in the mounting groove (2), and an oil return pipe (4) is provided in the sleeve (3). A fixing plate (5) is welded and fixed on the combustion cylinder (1), a first spring (6) is welded and fixed on the fixing plate (5), a connecting plate (7) is welded and fixed on the other end of the first spring (6), a clamping rod (8) is welded and fixed on the connecting plate (7), and the clamping rod (8) is slidably connected to the fixing plate (5). A clamping groove (10) is provided on the mounting plate (9), and the mounting plate (9) is fixedly connected to the fixing plate (5). A rubber pad (11) is provided. A threaded rod (12) is threadedly connected to the mounting plate (9). The end of the threaded rod (12) is rotatably connected to a connecting plate (13). A positioning groove (14) is provided through the connecting plate (13). A positioning rod (16) is slidingly connected in the positioning groove (14). A rubber block (15) is fixedly connected to the end of the positioning rod (16). A second spring (17) is welded and fixed in the positioning rod (16). A stopper (18) is welded and fixed at the other end of the second spring (17). The stopper (18) is slidably connected in the positioning rod (16).

2. The extrusion seal structure for a gas turbine according to claim 1, characterized in that: The fixing plates (5) are symmetrically distributed on the front and rear sides of the mounting groove (2), the mounting plates (9) are symmetrically distributed on the left and right sides of the mounting groove (2), the mounting plates (9) on both sides are fitted together, the mounting plates (9) and the combustion cylinder (1) are fitted together, and the clamping rods (8) are symmetrically distributed on both sides of the fixing plate (5).

3. The extrusion seal structure for a gas turbine according to claim 1, characterized in that: The threaded rods (12) are symmetrically distributed on both sides of the mounting plate (9), and the rubber pads (11), the connecting plates (13) and the rubber blocks (15) are all in the shape of semicircular rings.

4. The extrusion seal structure for a gas turbine according to claim 1, characterized in that: The positioning groove (14) is provided in the middle portion of the connecting plate (13), and the connecting plate (13) is fitted with the rubber block (15).

5. The extrusion seal structure for a gas turbine according to claim 1, characterized in that: The positioning rod (16) is fixed at the middle part of the rubber block (15), the length of the positioning rod (16) is greater than the thickness of the connecting plate (13), and the cross section of the positioning rod (16) and the cross section of the positioning groove (14) are both rectangular.

6. The extrusion seal structure for a gas turbine according to claim 1, characterized in that: The second springs (17) are symmetrically distributed on both sides of the positioning rod (16), and the second springs (17) correspond to the stoppers (18) one by one. The cross section of the end of the stoppers (18) is a right-angled trapezoid.

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