Dismounting device for steam seal in steam turbine

Abstract

A dismounting device for a steam seal in a steam turbine comprises a mounting table, a top surface of the mounting table is used for placing an arc-shaped steam seal sleeve, and the top surface is provided with a restraining part used for restraining the mounting table and the steam seal sleeve together in a detachable mode; the pushing part is arranged on the table surface of the mounting table and is used for corresponding to the end surface of an arc-shaped steam seal body on the inner ring wall of the steam seal sleeve; and the output end of the driving mechanism acts on the pushing piece and is used for driving the pushing piece to rotate in the circumferential direction of the steam sealing sleeve, so that the steam sealing body is pushed to move in the circumferential direction relative to the steam sealing sleeve till being separated from the steam sealing sleeve. The steam sealing sleeve provided with the steam sealing body is restrained on the table top of the mounting table, the pushing piece is aligned with the end face of the steam sealing body, then the driving mechanism drives the pushing piece to rotate in the circumferential direction of the steam sealing sleeve, the pushing piece can push the steam sealing body to move in the circumferential direction relative to the steam sealing sleeve till the steam sealing body is separated from the steam sealing sleeve, and the steam sealing body is detached. The whole process is convenient to operate, time-saving and labor-saving.

Description

Technical Field

[0001] The utility model belongs to the technical field of steam turbines, and in particular relates to a dismantling device for a steam seal in a steam turbine. Background Art

[0002] A steam seal is a device installed between the moving and static parts of a steam turbine to reduce or prevent steam leakage and air ingress into the vacuum side. For example, Chinese utility model patent application number 202420502993.1, authorized by CN221722874U, titled "A Flexible Steam Turbine Seal Ring Assembly with Automatic Compensation for Axial Movement," includes a first ring body and a second ring body, which are detachably connected. The seal also includes sealing teeth that slide along the axis of the first ring body. Seal grooves are defined on the outer walls of both the first and second ring bodies, and the teeth are mounted within the grooves. Positioning rods are inserted into the outer walls of both the first and second ring bodies.

[0003] When adjusting the flow clearance of the steam turbine during installation and maintenance, it is necessary to separate the steam seal body (i.e. the above-mentioned sealing teeth) from the steam seal groove on the inner ring wall of the steam seal sleeve (i.e. the above-mentioned first ring body and second ring body) for inspection and maintenance. How to quickly remove the steam seal body and facilitate operation has become a technical problem that needs to be solved urgently. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a dismantling device for the steam seal in a steam turbine in view of the current status of the prior art, so as to facilitate the separation of the steam seal body from the steam seal sleeve.

[0005] The technical solution adopted by the present invention to solve the above technical problems is: a device for removing the steam seal inside a steam turbine, which is characterized by comprising:

[0006] The mounting table has a table top for placing the arc-shaped steam gland sleeve thereon, and a restraining member for restraining the mounting table and the steam gland sleeve together in a detachable manner is provided on the table top;

[0007] A pushing member is provided on the table surface of the mounting table and is used to correspond to the end surface of the arc-shaped steam seal body on the inner ring wall of the steam seal sleeve;

[0008] The driving mechanism, whose output end acts on the pushing member, is used to drive the pushing member to rotate along the circumference of the steam seal sleeve, thereby pushing the steam seal body to move circumferentially relative to the steam seal sleeve until it is separated from the steam seal sleeve.

[0009] In this way, the steam seal sleeve equipped with the steam seal body is constrained on the table top of the mounting table, the pushing member is aligned with the end face of the steam seal body, and then the driving mechanism drives the pushing member to rotate along the circumference of the steam seal sleeve. The pushing member can push the steam seal body to move circumferentially relative to the steam seal sleeve until the steam seal body is separated from the steam seal sleeve, thereby completing the removal of the steam seal body. The whole process is easy to operate and saves time and effort.

[0010] Preferably, the restraining component includes:

[0011] Two upright posts are arranged side by side and spaced apart on the table top of the mounting table so that the two end surfaces of the arc-shaped steam gland are respectively arranged corresponding to the side surfaces of their respective upright posts, and the side surfaces of the upright posts are provided with through holes;

[0012] Two sets of first fasteners, each set of first fasteners passing through a through hole on a corresponding column and then connected to an end face of a corresponding steam gland sleeve, so as to press the end face of the steam gland sleeve against the side face of the column;

[0013] The pushing member is located between the two columns.

[0014] That is, the setting of the column can restrain the steam seal sleeve while not affecting the installation and operation of the pusher.

[0015] Preferably, the first fastener is a screw or nut. The end surface of the steam gland is provided with a matching threaded hole.

[0016] Preferably, the through hole is a long hole extending along the length direction of the column, so that it can be suitable for constraining steam glands of different axial sizes.

[0017] In the above solution, in order to better push the steam seal strip to move, preferably, the pushing member is a vertically arranged plate, and the first plate surface on one side of the plate is used to correspond to the end surface of the steam seal body and extend radially along the steam seal body.

[0018] Preferably, a detachable pad is provided on the plate body, and at least a portion of the pad protrudes relative to the first plate surface of the plate body for contacting the end surface of the steam seal body.

[0019] In this way, different sized gaskets can be used for different sized steam seal bodies to prevent the steam seal strip from being deformed and damaged during the pushing process, and to better promote the movement of the steam seal body.

[0020] Preferably, there are at least two gaskets spaced apart in the vertical direction. Each gasket is convex in shape, with its small end inserted into the through-hole of the plate body and its large end protruding relative to the first plate surface of the plate body. The convex shape of the gasket facilitates assembly and disassembly, and when installed, its large end abuts against the end surface of the steam seal body, preventing the gasket from separating from the plate body.

[0021] Furthermore, a vibrator is included to act on the pushing member to vibrate the pushing member, thereby improving the efficiency of removal and preventing the steam seal strip from getting stuck.

[0022] In the above solutions, preferably, the driving mechanism includes:

[0023] Power parts;

[0024] A vertically arranged rotating shaft can rotate around its own axis under the drive of the power member, and the upper end of the rotating shaft is located above the table surface of the mounting table;

[0025] A transmission sleeve capable of rotating with the rotating shaft is circumferentially sleeved on the outer periphery of the rotating shaft and is located on the surface of the mounting table;

[0026] The pushing member is detachably mounted on the transmission sleeve.

[0027] Preferably, the transmission sleeve is provided with a connecting arm extending outwardly from the side of the transmission sleeve, and the pusher is arranged on the connecting arm in a manner that it can be moved along the length direction of the connecting arm and then fixed. In this way, the position of the pusher can be adjusted according to the inner diameter of the steam seal sleeve.

[0028] Furthermore, the pushing member is provided with a strip hole extending along the length direction of the connecting arm, and also includes a second fastener, which passes through the strip hole and is connected to the connecting arm, and presses the connecting arm and the pushing member tightly.

[0029] Compared with the prior art, the advantages of the present invention are: by setting up a mounting platform, a pushing member and a driving mechanism, the steam seal sleeve equipped with the steam seal body is constrained on the table surface of the mounting platform, the pushing member is aligned with the end face of the steam seal body, and then the driving mechanism drives the pushing member to rotate along the circumference of the steam seal sleeve, so that the pushing member can push the steam seal body to move circumferentially relative to the steam seal sleeve until the steam seal body is separated from the steam seal sleeve, thereby completing the removal of the steam seal body. The whole process is easy to operate and saves time and effort. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a schematic structural diagram of an embodiment of the present utility model;

[0031] Figure 2 This is a front view of an embodiment of the utility model;

[0032] Figure 3 It is a left side view of an embodiment of the utility model;

[0033] Figure 4 A top view of an embodiment of the present utility model;

[0034] Figure 5 for Figure 4 Enlarged view of part A in the middle;

[0035] Figure 6 This is a schematic diagram of the partial structure of an embodiment of the utility model from another perspective;

[0036] Figure 7 This is a schematic diagram of the local structure of an embodiment of the utility model from another perspective. DETAILED DESCRIPTION

[0037] The present invention will be described in further detail below with reference to the accompanying drawings and embodiments.

[0038] like Figures 1 to 7 As shown in FIG. 1 , a preferred embodiment of a device for removing a steam seal in a steam turbine according to the present invention is shown. The device comprises a mounting platform 1 , a restraining component 2 , a pushing member 3 , a driving mechanism 4 , a pad 5 and a vibrator 6 .

[0039] The surface of the mounting platform 1 is provided for placing the arc-shaped steam gland 8 thereon.

[0040] The restraining component 2 is provided on the table top of the mounting table 1, and is used to restrain the mounting table 1 and the steam seal sleeve 8 together in a detachable manner. In this embodiment, the restraining component 2 includes two columns 21, which are arranged side by side on the table top of the mounting table 1, so that the two end faces of the arc-shaped steam seal sleeve 8 correspond to the side faces of their respective columns 21, and the side faces of the columns 21 are provided with strip-shaped through holes 210 extending along the length direction of the columns 21. The restraining component 2 also includes two groups of first fasteners 22, and each group of first fasteners 22 is a screw-nut member. One end of the screw in the screw-nut member passes through the through hole 210 on the corresponding column 21 and is threadedly connected to the threaded hole on the end face of the corresponding steam seal sleeve 8. The other end of the screw is threadedly connected to a nut to press the end face of the steam seal sleeve 8 against the side face of the column 21. For details, please refer to Figure 3 In order to be suitable for steam seal sleeves 8 with different inner diameters, the distance between the two columns 21 is adjustable, that is, the two columns 21 are arranged on the table top of the mounting platform 1 in a manner that they can be relatively moved and then fixed. Specifically, the table top of the mounting platform 1 is provided with a strip-shaped mounting hole 11 extending along the arrangement direction of the two columns. The upper end of the screw passes through the strip-shaped mounting hole 11 and is threadedly connected to the threaded hole on the lower end surface of the corresponding column 21. The lower end of the screw is threadedly connected with a nut to fix and press the column 21 on the table top of the mounting platform 1, and the distance between the two columns 21 can be adjusted. For details, please refer to Figure 3 、 4 、6.

[0041] The pusher 3 is located on the surface of the mounting platform 1, between the two columns 21, and is used to correspond to the end face of the arc-shaped steam seal body 9 on the inner wall of the steam seal sleeve 8. The output end of the drive mechanism 4 acts on the pusher 3, driving the pusher 3 to rotate along the circumference of the steam seal sleeve 8, thereby pushing the steam seal body 9 to move circumferentially relative to the steam seal sleeve 8 until it is separated from the steam seal sleeve 8.

[0042] In this embodiment, the driving mechanism 4 includes a power member 41, a rotating shaft 42 and a transmission sleeve 43. The rotating shaft 42 is arranged vertically and can rotate around its own axis under the drive of the power member 41. The upper end of the rotating shaft 42 is located above the table surface of the mounting platform 1, and the lower end of the rotating shaft 42 is located below the table surface of the mounting platform 1. The rotating shaft 42 is constrained to the mounting platform 1 through a bearing 420. The power member 41 is an existing driven hydraulic wrench. The transmission sleeve 43 is located above the table surface of the mounting platform 1 and is circumferentially sleeved on the outer periphery of the rotating shaft 42. It can rotate with the rotating shaft 42, and the height of the transmission sleeve 43 is adjustable to match steam seals of different axial sizes, as shown in FIG. Figure 2 As shown, a transmission sleeve 43 is mounted on the outer periphery of the rotating shaft 42 so as to be movable up and down. The sidewall of the transmission sleeve 43 is provided with a threaded hole extending through the thickness of the sleeve itself. A locking bolt 44 is threadedly connected to the threaded hole and abuts against the side of the rotating shaft 42, thereby securing the transmission sleeve 43 to the rotating shaft 42. When the height of the transmission sleeve 43 needs to be adjusted, the locking bolt is loosened. The transmission sleeve 43 is provided with a connecting arm 430 extending outward from the side of the transmission sleeve 43. The pusher 3 is mounted on the connecting arm 430 so as to be movable along the length of the connecting arm 430 and then fixed. Specifically, the pusher 3 is a vertically arranged plate having a strip-shaped hole 32 extending along the length of the connecting arm 430. The second fastener 7 is a bolt-nut member. The shank of the bolt in the bolt-nut member passes through the connecting hole in the connecting arm 430 and the strip-shaped hole 32 in the plate, and then is threadedly connected to the nut in the bolt-nut member, thereby connecting the connecting arm 430 and the pusher 3 and pressing them together. At the same time, the first surface on one side of the plate is designed to correspond to the end face of the steam seal body 9 and extends radially along the steam seal body 9. Three spacers 5 (made of copper) are spaced vertically on the plate. Each spacer 5 is convex in shape, with its small end inserted into a through-hole 31 in the plate and its large end protruding from the first surface of the plate to contact the end face of the steam seal body 9. During removal, the appropriate spacer 5 can be selected based on the size of the steam seal body 9 and inserted into the through-hole 31 in the plate, making the removal process easier.

[0043] The vibrator 6 acts on the second surface of the plate to vibrate the plate. In this embodiment, the vibrator 6 is a conventional pneumatic turbine vibrator equipped with a compact vacuum air pump 60. The vibrator generates vibrations during operation, preventing the plate from jamming when pushing against the seal body 9.

Claims

1. A device for removing the steam seal in a steam turbine, characterized in that Includes: A mounting platform (1) has a platform surface for placing an arc-shaped steam seal sleeve (8) thereon, and a restraining component (2) is provided on the platform surface for restraining the mounting platform (1) and the steam seal sleeve (8) together in a detachable manner; A pushing member (3) is provided on the surface of the mounting platform (1) and is used to correspond to the end surface of the arc-shaped steam seal body (9) on the inner wall of the steam seal sleeve (8); The driving mechanism (4) has an output end acting on the pushing member (3) for driving the pushing member (3) to rotate along the circumference of the steam seal sleeve (8), thereby pushing the steam seal body (9) to move circumferentially relative to the steam seal sleeve (8) until it is separated from the steam seal sleeve (8).

2. The removal device according to claim 1, characterized in that: The restraining component (2) includes: Two columns (21) are arranged side by side and spaced apart on the surface of the mounting platform (1), so that the two end surfaces of the arc-shaped steam seal sleeve (8) are respectively arranged corresponding to the side surfaces of the respective columns (21), and the side surfaces of the columns (21) are provided with through holes (210); Two groups of first fasteners (22), each group of first fasteners (22) respectively passes through a through hole (210) on a corresponding column (21) and is connected to an end face of a corresponding steam seal sleeve (8) to press the end face of the steam seal sleeve (8) against a side face of the column (21); The pushing member (3) is located between the two upright posts (21).

3. The removal device according to claim 2, characterized in that: The through hole (210) is a long hole extending along the length direction of the column (21).

4. The removal device according to claim 1, characterized in that: The pushing member (3) is a vertically arranged plate body, and a first plate surface on one side of the plate body is used to correspond to the end surface of the steam seal body (9) and extend along the radial direction of the steam seal body (9).

5. The removal device according to claim 4, characterized in that: A detachable pad (5) is provided on the plate body, and at least a portion of the pad (5) protrudes relative to the first plate surface of the plate body and is used to contact the end surface of the steam seal body (9).

6. The removal device according to claim 5, characterized in that: There are at least two pads (5) arranged at intervals in the vertical direction; and each pad (5) is in a convex shape, with its small end inserted into the through hole (31) of the plate body and its large end protruding relative to the first plate surface of the plate body.

7. The removal device according to claim 1, characterized in that: It also includes a vibrator (6) that acts on the pushing member (3) to cause the pushing member (3) to vibrate.

8. The removal device according to any one of claims 1 to 7, characterized in that: The driving mechanism (4) comprises: Power member (41); A vertically arranged rotating shaft (42) can rotate around its own axis under the drive of the power member (41), and the upper end of the rotating shaft (42) is located above the table surface of the mounting table (1); A transmission sleeve (43) capable of rotating with the rotating shaft (42) is circumferentially sleeved on the outer periphery of the rotating shaft (42) and is located on the surface of the mounting platform (1); The pushing member (3) is detachably mounted on the transmission sleeve (43).

9. The removal device according to claim 8, characterized in that: The transmission sleeve (43) is provided with a connecting arm (430) extending outward from the side of the transmission sleeve (43), and the pushing member (3) is arranged on the connecting arm (430) in a manner that it can move along the length direction of the connecting arm (430) and then be fixed.

10. The removal device according to claim 9, characterized in that: The pushing member (3) is provided with a strip hole (32) extending along the length direction of the connecting arm (430), and further includes a second fastener (7) which passes through the strip hole (32) and is connected to the connecting arm (430) and presses the connecting arm (430) and the pushing member (3) together.

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