CN112024741A

CN112024741A - Tooth riveting device and method for steam seal teeth of steam turbine

Info

Publication number: CN112024741A
Application number: CN202010763573.5A
Authority: CN
Inventors: 刘应迁; 薛飞; 王秀军; 张京刚; 王海东; 李江; 田东亮
Original assignee: Beijing Longwei Power Generation Technology Co Ltd
Current assignee: Beijing Longwei Power Generation Technology Co Ltd
Priority date: 2020-07-31
Filing date: 2020-07-31
Publication date: 2020-12-04
Anticipated expiration: 2040-07-31
Also published as: CN112024741B

Abstract

The invention relates to a tooth riveting device and a tooth riveting method for steam seal teeth of a steam turbine. Be provided with stop device on the connecting seat for prevent that flat shovel head from riveting the tooth in-process and rotating, stop device is inside to be square logical groove, and flat shovel head passes through limiting connection pole to be connected in drive assembly, and limiting connection pole be with square logical groove matched with, and the section is square body of rod structure. The driving assembly is used for driving the limiting connecting rod to reciprocate along the axial direction of the limiting connecting rod, so that the limiting connecting rod drives the flat shovel head to rivet teeth. The steam seal tooth piece fixing device has the beneficial effects that the arrangement of the limiting device enables the flat shovel head not to rotate around the axis of the flat shovel head due to the fact that the flat shovel head is movably connected with the cylindrical clamping handle and the spring has a certain rotating range, and the fixed steam seal tooth piece is effectively prevented from being accidentally injured.

Description

Tooth riveting device and method for steam seal teeth of steam turbine

Technical Field

The invention relates to the technical field of steam turbine product assembly, in particular to a gear riveting device and method for steam seal teeth of a steam turbine.

Background

In the design process of the steam turbine, air leakage is possible between a moving part and a static part and between each stage, and in order to reduce air leakage loss and improve the economy of the steam turbine, a steam seal is required to be designed at a proper position. Most of steam turbine rotor steam seals in China are fixed steam seal tooth blade steam seals. In a power plant, a fixed steam seal tooth piece which is seriously abraded is generally pulled out and a new fixed steam seal tooth piece is embedded when a steam turbine is overhauled.

When a new fixed steam seal tooth sheet is embedded, a filling sheet for tightly extruding the fixed tooth steam seal sheet is riveted by a wind shovel mostly, and the fixed tooth steam seal sheet is tightly extruded in a rotor mounting groove through the filling sheet. In the prior art, the wind shovel head and the wind shovel cylinder clamping handle are of an integral structure, and the integral structure is fixedly connected with the driving assembly through a spring. When the impact is riveted, the whole formed by the wind shovel head and the cylinder clamping handle is driven by the driving assembly and is movably connected with the spring, the spring can rotate in a certain range, and then the wind shovel head and the cylinder clamping handle can rotate around the axial direction of the wind shovel head and the cylinder clamping handle, so that the embedded fixed steam sealing tooth piece can be easily accidentally injured.

Therefore, what is needed is a tooth riveting device and method for preventing the steam seal teeth of the steam turbine from being accidentally damaged when a new fixed steam seal tooth sheet is embedded in an impact riveting filling sheet.

Disclosure of Invention

Technical problem to be solved

In view of the above disadvantages and shortcomings of the prior art, the present invention provides a tooth riveting device for steam seal teeth of a steam turbine and a method thereof, which solves the technical problem of accidentally damaging the installed fixed steam seal tooth piece when a new fixed steam seal tooth piece is installed by impacting a riveting filling piece.

(II) technical scheme

In order to achieve the purpose, the invention adopts the main technical scheme that:

in a first aspect, an embodiment of the invention provides a riveting tooth device for steam seal teeth of a steam turbine, which comprises a connecting seat fixedly connected with an external tool rest, a flat shovel head and a driving assembly;

the connecting seat is provided with a limiting device, a square through groove is formed in the limiting device, the flat shovel head is connected to the driving assembly through a limiting connecting rod with a square section, and the limiting connecting rod penetrates through the square through groove of the limiting device and is matched with the square through groove to prevent the flat shovel head from rotating in the riveting and filling process;

the driving assembly drives the limiting connecting rod to reciprocate along the axial direction of the limiting connecting rod, so that the limiting connecting rod drives the flat shovel head to rivet and fill the filling piece.

Optionally, the flat shovel head and the limit connecting rod are coaxially connected to one end of the limit connecting rod, and the limit connecting rod drives the flat shovel head to rivet the plane where the tooth is located in a direction perpendicular to the filling sheet.

Optionally, the limiting device comprises a mounting plate, a first plate, a second plate and a third plate;

the first plate and the third plate are equal in width and are arranged in parallel, the two ends of the second plate are respectively connected with the first plate and the third plate to form a T-shaped structure, the opening end of the T-shaped structure is fixed to one side of the mounting plate to form a square through groove, and the other side of the mounting plate is fixedly connected with the connecting seat.

Optionally, the mounting plate is detachably mounted on the connecting base by screws.

Optionally, the drive assembly comprises a cylinder, a cylinder clamp handle, a spring and a handle housing.

The cylinder sets up in the handle shell. The driving end of the cylinder is connected with one end of the cylindrical clamping handle, and the other end of the cylindrical clamping handle penetrates through the handle shell to be connected with the limiting connecting rod. The cylinder is used for driving the limiting connecting rod to slide in the slide way matched with the limiting connecting rod.

One end of the spring is connected with the handle shell, and the other end of the spring is movably clamped with the cylindrical clamping handle.

Optionally, the drive assembly further comprises an air inlet fitting and a trigger.

One end of the air inlet joint is connected with an external air inlet pipe, and the other end of the air inlet joint penetrates through the handle shell to be connected with the air cylinder and used for driving the air cylinder to move.

The trigger is a switch of the air inlet connector. For controlling the starting or stopping of the cylinders.

Optionally, the length of the spacing connecting rod is 150mm-300 mm.

In a second aspect, an embodiment of the present invention provides a method for riveting teeth of a steam turbine gland seal tooth, where the method is applied to a tooth riveting device for a steam turbine gland seal tooth, and includes the following steps:

s1, starting the driving component to enable the driving component to drive the limiting connecting rod to reciprocate along the axial direction of the limiting connecting rod;

and S2, driving the flat shovel head connected with the limiting connecting rod to rivet and fill the steam turbine.

And S3, tightly extruding the fixed steam seal tooth sheet in the rotor mounting groove through a riveting filling sheet.

Optionally, step S1 includes:

and S11, pressing the trigger to start the air cylinder.

S12, the cylinder drives the cylinder clamping handle fixedly connected with the cylinder to move.

S13, the cylinder clamping handle drives a limiting connecting rod connected with the cylinder clamping handle.

S14, the limit connecting rod drives the flat shovel head connected with the limit connecting rod to rivet and beat the filling sheet.

(III) advantageous effects

The invention has the beneficial effects that: according to the gear riveting device and the gear riveting method for the steam seal gear of the steam turbine, two ends of a limiting connecting rod are respectively connected with a flat shovel head and a driving assembly, the driving assembly is fixedly connected with the limiting connecting rod, the driving assembly drives the limiting connecting rod to slide on the limiting device with a square through groove in the inner portion, meanwhile, the limiting device is arranged on a connecting seat, and the limiting device is connected with the connecting seat in a detachable connection mode to provide a stable and good channel for the limiting connecting rod. Compared with the prior art, when the steam sealing tooth piece is riveted through impact, the flat shovel head cannot rotate around the axis of the flat shovel head due to the fact that the flat shovel head is arranged on the spring movably connected with the cylindrical clamping handle in a certain rotating range, and the fixed steam sealing tooth piece is effectively prevented from being accidentally injured.

Drawings

FIG. 1 is a perspective view of a tooth riveting device for steam turbine seal teeth according to the present invention;

FIG. 2 is a perspective view of a rivet tooth assembly attachment base portion of the steam turbine seal tooth of FIG. 1;

FIG. 3 is a schematic sectional view of the mounting of a steam seal tooth piece of the tooth riveting device for steam seal teeth of a steam turbine in a rotor mounting groove;

fig. 4 is a schematic cross-sectional view illustrating a driving assembly of a tooth riveting device for a steam seal tooth of a steam turbine according to the present invention.

[ description of reference ]

100: a connecting seat;

201: a limit connecting rod; 202: a flat shovel head;

300: a drive assembly; 301: a cylinder; 302: a cylindrical clamping handle; 303: a spring; 304: a handle housing; 305: an air inlet joint; 306: a trigger;

400: a limiting device; 401: mounting a plate; 402: a first plate; 403: a second plate; 404: a third plate;

500: a step round bulge;

600: a rotor mounting groove;

700: fixing the steam seal tooth sheet;

800: and (6) filling.

Detailed Description

For the purpose of better explaining the present invention and to facilitate understanding, the present invention will be described in detail by way of specific embodiments with reference to the accompanying drawings.

According to the tooth riveting device and the tooth riveting method for the steam seal teeth of the steam turbine, two ends of a limiting connecting rod 201 are respectively connected with a flat shovel head 202 and a driving assembly 300, the driving assembly 300 drives the limiting connecting rod 201 to slide in a square through groove in a limiting device 400, meanwhile, the limiting device 400 is arranged on a connecting seat 100 in a detachable connection mode, and the connecting seat 100 is connected with an external tool rest. A well-stabilized limiting device 400 is provided for limiting the connecting rod 201. Compared with the prior art, when impact riveting is performed, the arrangement of the limiting device 400 enables the flat shovel head 202 not to rotate around the axis of the flat shovel head due to the fact that the spring 303 movably connected with the cylinder clamping handle 302 has a certain rotation range, and the fixed steam sealing tooth piece 700 is effectively prevented from being accidentally injured.

In order to better understand the above technical solutions, exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention can be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

Example 1:

referring to fig. 1-4, a riveting tooth device for steam turbine gland sealing teeth comprises a connecting seat 100 fixed with an external tool rest, a flat shovel head 202 and a driving assembly 300;

a limiting device 400 is arranged on the connecting seat 100, and a square through groove is arranged inside the limiting device 400. The flat shovel head 202 is connected to the driving assembly 300 through a limit connecting rod 201 with a square cross section. Limiting connecting rod 201 passes through the square through groove of limiting device 400 and is matched with the square through groove, and is used for preventing flat shovel head 202 from rotating around the axis of driving assembly 300 in the riveting and filling process.

The driving assembly 300 drives the limit connecting rod 201 to reciprocate along the axial direction thereof, so that the limit connecting rod 201 drives the flat blade head 202 to rivet and fill the piece 800.

Further, flat shovel head 202 and limit connecting rod 201 are connected in limit connecting rod 201's one end coaxially, and limit connecting rod 201 drives flat shovel head 202 and rivets the plane that the direction of tooth is perpendicular to shim 800 place, for the installation of cooperation fixed steam seal tooth piece 700, fixed steam seal tooth piece 700 is vertical installation in the mounting groove 600 of rotor likewise. The flat shovel head 202 is a shovel head on a wind shovel, and can also be obtained by quenching a self-made flat shovel head.

Further, the spacing device 400 includes a mounting plate 401, a first plate 402, a second plate 403, and a third plate 404.

The first plate 402 and the third plate 404 are equal in width and arranged in parallel, two ends of the second plate 403 are respectively connected with the first plate 402 and the third plate 404 to form a T-shaped structure, an opening end of the T-shaped structure is fixed to one side of the mounting plate 401 to form a square through groove matched with the limiting connecting rod 201, and the other side of the mounting plate 101 is fixedly connected with the connecting base 100. So that the limiting connecting rod 201 reciprocates in the square through groove of the limiting device 400. In the process of the reciprocating motion of the limiting connecting rod 201 in the square through groove, the limiting connecting rod 201 cannot be separated from the square through groove, that is, the limiting device 400 is guaranteed to have a limiting effect. When the impact riveting is performed, the arrangement of the limiting device 400 enables the flat shovel head 202 not to rotate around the axis of the flat shovel head due to the fact that the spring 303 movably connected with the cylinder clamping handle 302 has a certain rotation range, and the fixed steam seal tooth piece 700 is effectively prevented from being accidentally injured.

Further, the mounting plate 401 is detachably mounted on the connection base 100 by screws, so that the mounting and dismounting with the connection base 100 are facilitated, and the use of the riveting tooth device is facilitated.

Further, the driving assembly 300 includes a cylinder 301, a cylinder grip handle 302, a spring 303, and a handle housing 304.

The cylinder 301 is disposed within the handle housing 304. The driving end of the cylinder 301 is connected with one end of the cylinder clamping handle 302, and the other end of the cylinder clamping handle 302 passes through the handle shell 304 to be connected with the limit connecting rod 201. The air cylinder 301 is used for driving the limit connecting rod 201 to slide in the slide way 400 matched with the limit connecting rod 201.

One end of the spring 303 is connected to the handle housing 304. The other end of the spring 303 is movably clamped with the cylindrical clamping handle 302. Wherein, the spring 303 plays a role in limiting and fixing. The cylindrical clamping handle 302 is integrally formed with a step protrusion 500, and the step protrusion 500 is movably connected with one end of the spring 303. Therefore, when the cylinder 301 drives the cylinder clamping handle 302 to rivet towards the flat shovel head 202, the cylinder clamping handle 302 moves towards the flat shovel head 202, when the step round bulge 500 moves to the spring 303 and is clamped with the spring 303, the reciprocating stroke of the cylinder clamping handle 302 along the axial direction is ensured to be within a certain range, and further, the limit connecting rod 201 welded with the cylinder clamping handle 303 and the flat shovel head 202 are ensured to be too large in force to rivet the filling piece 800, so that the filling piece 800 is damaged.

Further, the drive assembly 300 also includes an air inlet fitting 305 and a trigger 306.

One end of the intake joint 305 is connected to an external intake pipe. The other end of the air inlet joint 305 is connected with the air cylinder 301 and is used for driving the air cylinder 301 to move. The inlet fitting 305 is connected to external pneumatic air to provide power for operation of the cylinder 301.

The trigger 306 is a switch for the air inlet connector 305. The opening or relationship of the inlet fitting 305 is controlled by trigger 306, which in turn controls the activation or deactivation of the cylinder 301.

Further, the length of the limiting connecting rod 201 is 150mm-300mm, so that the riveting teeth can be conveniently machined, and the limiting connecting rod 201 is prevented from being too long and being easily clamped.

A method for riveting teeth of steam turbine gland sealing teeth is applied to a tooth riveting device of the steam turbine gland sealing teeth and comprises the following steps:

s1, starting the driving assembly 300 to enable the driving assembly 300 to drive the flat shovel head 202 on the limit connecting rod 201 to reciprocate along the axial direction of the flat shovel head;

and S2, driving the flat shovel head 202 connected with the limit connecting rod 201 to rivet and beat the filler piece 800 for the steam turbine.

S2, the fixed steam seal tooth piece 700 is tightly pressed to the rotor mounting groove 600 by the riveting and caulking piece 800.

Further, step S1 includes:

s11, pressing the trigger 306 activates the cylinder 301.

S12, the cylinder 301 drives the cylinder clamping handle 302 fixedly connected with the cylinder 301 to move.

S13, the cylinder clamping handle 302 drives the limit connecting rod 201 connected with the cylinder clamping handle 302.

S14, the limit connecting rod 201 drives the flat shovel head 202 connected with the limit connecting rod to rivet and beat the filling sheet 800.

In the description of the present invention, it is to be understood that the terms "first", "second" and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium; either as communication within the two elements or as an interactive relationship of the two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, a first feature may be "on" or "under" a second feature, and the first and second features may be in direct contact, or the first and second features may be in indirect contact via an intermediate. Also, a first feature "on," "above," and "over" a second feature may be directly or obliquely above the second feature, or simply mean that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the second feature, or may simply mean that the first feature is at a lower level than the second feature.

In the description herein, the description of the terms "one embodiment," "some embodiments," "an embodiment," "an example," "a specific example" or "some examples" or the like, means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present invention have been shown and described above, it should be understood that the above embodiments are illustrative and not restrictive, and that those skilled in the art may make changes, modifications, substitutions and alterations to the above embodiments without departing from the scope of the present invention.

Claims

1. The utility model provides a steam turbine gland sealing tooth rivet tooth device which characterized in that: comprises a connecting seat (100) fixedly connected with an external tool rest, a flat shovel head (202) and a driving component (300);

the connecting seat (100) is provided with a limiting device (400), a square through groove is formed in the limiting device (400), the flat shovel head (202) is connected to the driving assembly (300) through a limiting connecting rod (201) with a square cross section, and the limiting connecting rod (201) penetrates through the square through groove of the limiting device (400) and is matched with the square through groove to prevent the flat shovel head (202) from rotating in the process of riveting the filling sheet (800);

the driving assembly (300) drives the limit connecting rod (201) to reciprocate along the axial direction of the limit connecting rod, so that the limit connecting rod (201) drives the flat shovel head (202) to rivet and beat the filling sheet (800).

2. The tooth riveting apparatus for steam turbine gland packing teeth of claim 1, wherein: the flat shovel head (202) and the limiting connecting rod (201) are coaxially connected to one end of the limiting connecting rod (201), and the limiting connecting rod (201) drives the flat shovel head (202) to rivet teeth in a direction perpendicular to a plane where the filling sheet (800) is located.

3. The tooth riveting apparatus for steam turbine gland packing teeth of claim 2, wherein: the limiting device (400) comprises a mounting plate (401), a first plate (402), a second plate (403) and a third plate (404);

the first plate (402) and the third plate (404) are equal in width and arranged in parallel, two ends of the second plate (403) are respectively connected with the first plate (402) and the third plate (404) to form a T-shaped structure, the open end of the T-shaped structure is fixed to one side of the mounting plate (401) to form the square through groove, and the other side of the mounting plate (101) is fixedly connected with the connecting seat (100).

4. The tooth riveting apparatus for steam turbine gland packing teeth of claim 3, wherein: the mounting plate (401) is detachably mounted on the connecting base (100) by a screw.

5. The tooth riveting apparatus for steam turbine gland packing teeth of claim 2, wherein: the driving assembly (300) comprises a cylinder (301), a cylinder clamping handle (302), a spring (303) and a handle shell (304);

the air cylinder (301) is arranged in the handle shell (304), the driving end of the air cylinder (301) is connected with one end of the cylindrical clamping handle (302), the other end of the cylindrical clamping handle (302) penetrates through the handle shell (304) to be connected with the limiting connecting rod (201), the air cylinder (301) is used for driving the limiting connecting rod (201) to reciprocate along the axial direction of the limiting connecting rod, and the limiting connecting rod (201) slides in the square through groove;

one end of the spring (303) is connected with the handle shell (304), and the other end of the spring is movably clamped with the cylindrical clamping handle (302).

6. The tooth riveting apparatus for steam turbine gland packing teeth of claim 5, wherein: the drive assembly (300) further comprises an air inlet fitting (305) and a trigger (306);

one end of the air inlet joint (305) is connected with an external air inlet pipe, and the other end of the air inlet joint (305) penetrates through the handle shell (304) to be connected with the air cylinder (301) and is used for driving the air cylinder (301) to move;

the trigger (306) is a switch of the air inlet joint (305) and is used for controlling the starting or stopping of the air cylinder (301).

7. The tooth riveting apparatus for steam turbine gland packing teeth of claim 1, wherein: the length of the limiting connecting rod (201) is 150mm-300 mm.

8. A method for riveting teeth of a steam turbine gland seal tooth, which is applied to the tooth riveting device of the steam turbine gland seal tooth according to claims 1-7, and is characterized by comprising the following steps:

s1, starting the driving assembly (300) to enable the driving assembly (300) to drive the limit connecting rod (201) to reciprocate along the axial direction of the limit connecting rod;

s2, driving the flat shovel head (202) connected with the limit connecting rod (201) to rivet and fill a filling piece (800) for the steam turbine by the limit connecting rod (201);

and S3, tightly extruding the fixed steam seal tooth sheet to the rotor mounting groove (600) through a riveting filling sheet (800).

9. The method of claim 8, wherein: step S1 includes:

s11, pressing the trigger (306) to start the air cylinder (301);

s12, the cylinder (301) drives the cylinder clamping handle (302) fixedly connected with the cylinder (301) to move;

s13, the cylinder clamping handle (302) drives the limiting connecting rod (201) connected with the cylinder clamping handle (302);

s14, the limit connecting rod (201) drives the flat shovel head (202) connected with the limit connecting rod to rivet and beat the filling sheet (800).