Steam seal ring for steam turbine and steam seal assembly for steam turbine

Abstract

The utility model provides a steam seal ring for a steam turbine and a steam seal assembly for the steam turbine, and relates to the technical field of steam turbines.The steam seal ring comprises a steam seal seat, a steam seal plate is arranged on the right side of the steam seal seat, an annular installation groove is formed in the right side face of the steam seal seat, and a plurality of arc-shaped installation blocks are arranged in the annular installation groove; the side faces, close to each other, of the arc-shaped mounting blocks are fixedly connected with spring pieces, the ends, close to each other, of the spring pieces are fixedly connected with connecting blocks, the ends, close to each other, of the connecting blocks are fixedly connected with arc-shaped steam sealing blocks, and the side faces, close to each other, of the arc-shaped steam sealing blocks are provided with a plurality of grooves. According to the steam seal ring for the steam turbine and the steam seal assembly for the steam turbine, through contact between the two butyl rubber sealing rings and the rotor and between the polyurethane sealing gasket and the rotor, efficient sealing treatment can be conducted between the rotor and the steam turbine shell, the sealing performance of the steam seal assembly is improved, and the steam seal assembly does not need to be matched with the rotor during installation.

Description

TECHNICAL FIELD

[0001] The utility model relates to a steam seal ring for steam turbine and steam seal assembly for steam turbine belongs to steam turbine technical field. BACKGROUND

[0002] Steam turbine is a kind of rotary power machinery that converts the heat energy of steam into mechanical energy, it mainly through the expansion of steam in steam turbine inside and does work, push the rotor of steam turbine rotation, and then drive generator or other mechanical load operation.

[0003] Steam flows from high-pressure zone to low-pressure zone in the working of steam turbine, if there is no effective sealing measure, a large amount of steam will leak from the gap between shaft end and partition, which not only reduces the efficiency of steam turbine, but also affects the safety of unit, so the steam seal assembly needs to be sealed, the steam turbine usually uses steam seal sheet of different lengths to carry out staggered sealing at sealing place, and the sealing performance of this steam seal assembly is poor, which will cause steam leakage, and the steam seal assembly needs to be adapted with rotor during installation, reduces assembly speed, therefore, we provide a steam seal ring for steam turbine and steam seal assembly for steam turbine to solve the above problems. SUMMARY

[0004] To solve the above problems, the utility model provides a steam seal ring for steam turbine and steam seal assembly for steam turbine to solve the above problems, and the specific technical scheme is:

[0005] A steam seal ring for steam turbine and steam seal assembly for steam turbine, including steam seal seat, the right side of steam seal seat is equipped with steam seal plate, the right side surface of steam seal seat is equipped with annular installation groove, the inside of annular installation groove is equipped with a plurality of arc-shaped mounting blocks, the side surface of each arc-shaped mounting block is fixedly connected with spring sheet, the end of each spring sheet is fixedly connected with connecting block, the end of each connecting block is fixedly connected with arc-shaped steam seal block, the side surface of each arc-shaped steam seal block is equipped with a plurality of grooves, the inside of each groove is installed with two butyl rubber sealing rings and polyurethane sealing pad, and the polyurethane sealing pad is located between the two butyl rubber sealing rings.

[0006] Preferably, the inside of steam seal seat is equipped with rotor, the inner circle of two butyl rubber sealing rings and the inner circle of polyurethane sealing pad are in contact with the outer surface of rotor.

[0007] Preferably, the outer surface of steam seal seat is fixedly connected with annular connecting plate, the outer surface of annular connecting plate is equipped with a plurality of connecting holes.

[0008] Preferably, the inner wall of annular installation groove is equipped with screw threads, the outer surface of the left end of steam seal plate is screw-connected with the inner wall of annular installation groove, and the right side surface of steam seal plate is fixedly connected with rotary block.

[0009] Preferably, the left side surface of the steam seal plate is fixedly connected with an annular polyurethane pad, and the right side surface of each arc-shaped steam seal block is in contact with the left side surface of the annular polyurethane pad.

[0010] Preferably, the inner wall of the steam seal seat is provided with annularly arranged sliding holes, and the outer surface of each connecting block is in sliding connection with the inner wall of each sliding hole.

[0011] Compared with the prior art, the utility model has the following beneficial effects:

[0012] The steam seal ring and the steam seal assembly for steam turbines, through the annular installation groove provided on the steam seal seat, can install multiple arc-shaped installation blocks and multiple arc-shaped steam seal blocks, through the multiple grooves provided on the arc-shaped steam seal blocks, can install two butyl rubber sealing rings and polyurethane sealing pads in the multiple grooves, through the multiple grooves, can form a zigzag steam seal channel, the pressure of steam will drop after passing through each groove, the steam leakage is reduced, and through the contact between the two butyl rubber sealing rings and the polyurethane sealing pad and the rotor, the rotor and the steam turbine shell can be efficiently sealed, the sealing performance of the steam seal assembly is improved, and the assembly speed is accelerated without adapting to the rotor during installation. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is a perspective structural schematic view of the front view of the utility model;

[0014] Figure 2 It is a sectional view of the front view of the utility model;

[0015] Figure 3 It is a perspective structural schematic view of the side view of the steam seal seat in the utility model;

[0016] Figure 4 It is a perspective structural schematic view of the side view of the steam seal seat in the utility model; Figure 2 It is an enlarged schematic view of the structure at A in the utility model.

[0017] BRIEF DESCRIPTION OF DRAWINGS: 1, steam seal seat; 2, steam seal plate; 3, rotor; 4, annular installation groove; 5, arc-shaped installation block; 6, spring sheet; 7, connecting block; 8, arc-shaped steam seal block; 9, groove; 10, butyl rubber sealing ring; 11, polyurethane sealing pad; 12, annular polyurethane pad; 13, rotating block; 14, annular connecting plate; 15, connecting hole; 16, sliding hole. DETAILED DESCRIPTION

[0018] In the description of the utility model, it is necessary to explain that, unless there are definite provisions and limitations, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixed connection, can also be detachable connection, or integral connection, can be mechanical connection, can also be electrical connection, can be directly connected, can also be indirectly connected through intermediate medium, can be the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood through specific circumstances.

[0019] The technical scheme in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary skilled in the art without creative labor belong to the scope of protection of the utility model.

[0020] Please refer to Figures 1-4 In the utility model, a steam seal ring for steam turbine and steam seal assembly for steam turbine, including steam seal seat 1, the right side of steam seal seat 1 is equipped with steam seal plate 2, the right side surface of steam seal seat 1 is equipped with annular installation groove 4, the inside of annular installation groove 4 is equipped with multiple arc-shaped mounting blocks 5, the side surface of each arc-shaped mounting block 5 close to each other is fixedly connected with spring leaf 6, the end of each spring leaf 6 close to each other is fixedly connected with connecting block 7, the end of each connecting block 7 close to each other is fixedly connected with arc-shaped steam seal block 8, the side surface of each arc-shaped steam seal block 8 close to each other is equipped with multiple recesses 9, the inside of each recess 9 is installed with two butyl rubber sealing rings 10 and polyurethane sealing pads 11 respectively, and polyurethane sealing pad 11 is located between two butyl rubber sealing rings 10, through the setting of arc-shaped mounting block 5 and spring leaf 6 and the cooperation with connecting block 7, arc-shaped steam seal block 8 can be driven to move, in turn, the rotating movement of rotor 3 can be buffered, and the abrasion caused by rotor 3 to steam seal assembly is reduced.

[0021] Preferably, the inside of steam seal seat 1 is equipped with rotor 3, the inner circle of two butyl rubber sealing rings 10 and the inner circle of polyurethane sealing pad 11 are in contact with the outer surface of rotor 3, the outer surface of steam seal seat 1 is fixedly connected with annular connecting plate 14, the outer surface of annular connecting plate 14 is equipped with multiple connecting holes 15, through the contact between two butyl rubber sealing rings 10 and polyurethane sealing pad 11 and rotor 3, efficient sealing treatment between rotor 3 and steam turbine shell can be carried out, by the cooperation of annular connecting plate 14 and connecting hole 15, the steam seal assembly and steam turbine shell can be connected and installed.

[0022] Preferably, the inner wall of the annular mounting groove 4 is provided with threads, the outer surface of the left end of the steam seal plate 2 is screwed with the inner wall of the annular mounting groove 4, the right side of the steam seal plate 2 is fixedly connected with a rotating block 13, the left side of the steam seal plate 2 is fixedly connected with an annular polyurethane pad 12, the right side of each arc-shaped steam seal block 8 is in contact with the left side of the annular polyurethane pad 12, the inner wall of the steam seal seat 1 is provided with annularly arranged sliding holes 16, and the outer surface of each connecting block 7 is respectively in sliding connection with the inner wall of each sliding hole 16.

[0023] The working principle of the utility model is:

[0024] In use, first, the plurality of arc-shaped mounting blocks 5 are taken and installed in the annular mounting groove 4, and at the same time, the plurality of arc-shaped steam seal blocks 8 are located in the steam seal seat 1, then, the two butyl rubber sealing rings 10 and the polyurethane sealing pad 11 are taken and installed in the plurality of grooves 9, when the butyl rubber sealing ring 10 and the polyurethane sealing pad 11 are installed, the steam seal plate 2 needs to be taken and installed at the right end of the steam seal seat 1, the plurality of arc-shaped mounting blocks 5 can be positioned and fixed, and then the contact between the two butyl rubber sealing rings 10 and the polyurethane sealing pad 11 and the rotor 3 can seal the gap between the shaft end and the steam turbine casing.

[0025] For those skilled in the art, it is obvious that the utility model is not limited to the details of the above-mentioned exemplary embodiments, and the utility model can be realized in other specific forms without departing from the spirit or basic characteristics of the utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting, the scope of the utility model is defined by the appended claims rather than the above description, and therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the utility model. Any reference signs in the claims should not be regarded as limiting the claims involved.

[0026] In addition, it should be understood that although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description manner of the specification is only for the sake of clarity, and those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can be properly combined to form other embodiments that those skilled in the art can understand.

[0027] The technical principles of the present application are described above in combination with specific embodiments. These descriptions are only for explaining the principles of the present application, and cannot be interpreted as limiting the protection scope of the present application in any way. Based on the explanations herein, other specific embodiments of the present application can be conceived by those skilled in the art without creative efforts, and these embodiments will all fall within the protection scope of the claims of the present application.

Claims

1. A steam seal ring for a steam turbine and a steam seal assembly for a steam turbine, comprising a steam seal carrier (1), characterized in that: The right side of the steam seal seat (1) is provided with a steam seal plate (2), the right side surface of the steam seal seat (1) is provided with an annular mounting groove (4), the inside of the annular mounting groove (4) is provided with a plurality of arc-shaped mounting blocks (5), the side surface of each arc-shaped mounting block (5) close to each other is fixedly connected with a spring sheet (6), the end of each spring sheet (6) close to each other is fixedly connected with a connecting block (7), the end of each connecting block (7) close to each other is fixedly connected with an arc-shaped steam seal block (8), the side surface of each arc-shaped steam seal block (8) close to each other is provided with a plurality of grooves (9), the inside of each groove (9) is respectively provided with two butyl rubber sealing rings (10) and a polyurethane sealing gasket (11), and the polyurethane sealing gasket (11) is located between the two butyl rubber sealing rings (10).

2. The steam seal ring for a steam turbine and the steam seal assembly for a steam turbine according to claim 1, characterized in that: The inside of the steam seal seat (1) is provided with a rotor (3), the inner circle of the two butyl rubber sealing rings (10) and the inner circle of the polyurethane sealing gasket (11) are in contact with the outer surface of the rotor (3).

3. The steam seal ring for a steam turbine and the steam seal assembly for a steam turbine according to claim 1, characterized in that: The outer surface of the steam seal seat (1) is fixedly connected with an annular connecting plate (14), and the outer surface of the annular connecting plate (14) is provided with a plurality of connecting holes (15).

4. The steam seal ring for a steam turbine and the steam seal assembly for a steam turbine according to claim 1, characterized in that: The inner wall of the annular mounting groove (4) is provided with threads, the outer surface of the left end of the steam seal plate (2) is threadedly connected with the inner wall of the annular mounting groove (4), and the right side surface of the steam seal plate (2) is fixedly connected with a rotating block (13).

5. The steam seal ring for a steam turbine and the steam seal assembly for a steam turbine according to claim 1, characterized by: The left side surface of the steam seal plate (2) is fixedly connected with an annular polyurethane pad (12), and the right side surface of each arc-shaped steam seal block (8) is in contact with the left side surface of the annular polyurethane pad (12).

6. A steam seal ring for a steam turbine and a steam seal assembly for a steam turbine according to claim 1, characterized in that: The inner wall of the steam seal seat (1) is provided with annularly arranged sliding holes (16), and the outer surface of each connecting block (7) is respectively and slidingly connected with the inner wall of each sliding hole (16).

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