Steam seal ring for steam turbine

Abstract

The steam seal ring comprises a first ring body and a second ring body, the second ring body is arranged on one side of the first ring body, clamping grooves are formed in the top and the bottom of one side of the second ring body, and clamping blocks matched with the clamping grooves for use are fixedly connected to the top and the bottom of one side of the first ring body. The utility model relates to the technical field of gland rings. According to the steam seal ring for the steam turbine, the clamping blocks and the clamping grooves are arranged between the first ring body and the second ring body, and the locking grooves and the locking rods are arranged between the clamping blocks and the clamping grooves, so that when the first ring body and the second ring body are combined and assembled through the clamping blocks and the clamping grooves, the first ring body and the second ring body can be automatically fixed through cooperation of the locking grooves and the locking rods; and secondly, the pre-pressing barrel is elastically arranged in the clamping groove, so that the locking rod can be pre-shrunk through the pre-pressing barrel, and then the clamping block and the clamping groove can be assembled in a matched mode in the follow-up process.

Description

Technical Field

[0001] The utility model relates to the technical field of steam seal rings, in particular to a steam seal ring for a steam turbine. Background Art

[0002] Steam turbines are divided into impulse steam turbines and reaction steam turbines according to their working principles. Steam turbines are a type of rotating machinery that uses steam as power and converts the thermal energy of steam into mechanical work. They are the most widely used prime movers in modern thermal power plants. In the entire steam turbine, steam will flow along a certain channel, and the quality of the channel's flow guidance determines the power of the entire steam turbine. Most of the existing steam seal rings are spliced ​​with two ring pieces, but during long-term use, the two ring bodies are prone to misalignment, which will affect the operation of the steam turbine and is not convenient for disassembly and assembly.

[0003] In order to avoid the above problems, in view of this: Chinese patent CN216691188U discloses a steam seal ring for steam turbine, which belongs to the technical field of steam turbine. The existing steam seal ring is not easy to disassemble and assemble when in use, and the two ring bodies are prone to misalignment. It includes a first ring body, the side wall of the first ring body is detachably provided with a second ring body, both end faces of the first ring body are fixedly connected with a convex rod, both end faces of the first ring body are fixedly connected with a convex block, both sides of the convex block are provided with a first prismatic groove, both end faces of the second ring body are provided with a clamping groove, the side wall of the clamping groove is provided with a second prismatic groove, both end faces of the second ring body are provided with a through opening, and the arc surface of the second ring body is penetrated with a threaded hole, one end of the threaded hole extends into the through opening and the threaded hole is perpendicular to the through opening. In the utility model, it is easy to disassemble and assemble, and can effectively avoid the misalignment between the first ring body and the second ring body.

[0004] Although the above-mentioned method achieves the effect of avoiding misalignment between the first ring body and the second ring body, it is inevitable that there are still some shortcomings in the actual use process. For example, the device lacks an automatic fixing mechanism, which leads to the problem of inconvenience in assembling the first ring body and the second ring body. In order to avoid such problems, a steam seal ring for a steam turbine is proposed to solve the existing problems. Utility Model Content

[0005] In view of the deficiencies of the prior art, the utility model provides a steam seal ring for a steam turbine, which solves the problem that the device lacks an automatic fixing mechanism, thereby causing inconvenience in assembling the first ring body and the second ring body.

[0006] To achieve the above objectives, the utility model is implemented through the following technical solutions: a steam seal ring for a steam turbine, comprising a first ring body and a second ring body, the second ring body being arranged on one side of the first ring body, the top and bottom of one side of the second ring body being provided with a card slot, the top and bottom of one side of the first ring body being fixedly connected with a card block used in conjunction with the card slot, the inner wall of the card slot being provided with a mounting groove, the two opposite sides of the inner cavity of the two mounting grooves being fixedly connected with a sleeve, the interior of the sleeve being slidably connected with a locking rod, a first spring being fixedly connected between the locking rod and the sleeve, the opposite sides of the two card blocks being provided with a locking groove used in conjunction with the locking rod, the interior of the card slot being elastically slidably provided with a pre-compression cylinder used in conjunction with the locking rod.

[0007] Preferably, roller rods are rotatably provided on both sides of the locking rod, an inclined frame pressure frame used in conjunction with the roller rods is provided on the front side of the inner cavity of the installation groove, and limiting through grooves used in conjunction with the inclined frame pressure frame are provided on the top and bottom of the front side of the second ring body.

[0008] Preferably, a cross bar matched with the pre-compression cylinder is fixedly connected to one side of the inner cavity of the card slot, and a second spring is fixedly connected between the cross bar and the pre-compression cylinder.

[0009] Preferably, positioning grooves are provided on both sides of the inner cavity of the installation groove, and a positioning slider is slidably connected inside the positioning groove.

[0010] Preferably, the opposite sides of the two positioning slide blocks are fixedly connected to the two sides of the inclined frame press frame respectively.

[0011] Beneficial Effects

[0012] The utility model provides a steam seal ring for a steam turbine. Compared with the prior art, the utility model has the following beneficial effects: the utility model provides a clamping block and a clamping groove between a first ring body and a second ring body, and provides a locking groove and a locking rod between the clamping block and the clamping groove, so that when the first ring body and the second ring body are assembled by the clamping block and the clamping groove, they can be automatically fixed by the cooperation of the locking groove and the locking rod, so as to achieve the effect of convenient fixed assembly, and secondly, by elastically providing a pre-compression cylinder inside the clamping groove, the locking rod can be pre-contracted by the pre-compression cylinder, so that the subsequent clamping block and the clamping groove can be fitted and assembled. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the external structure of the utility model;

[0014] Figure 2 It is an expanded view of the first ring body and the second ring body structure of the utility model;

[0015] Figure 3 It is a cross-sectional view of the first ring body and the second ring body structure of the utility model;

[0016] Figure 4 For this utility model Figure 3 A partial enlarged view of the middle A;

[0017] Figure 5 It is a schematic diagram of the inclined frame pressing structure of the utility model;

[0018] Figure 6 For this utility model Figure 5 A partial enlarged view of point B in the middle.

[0019] In the figure: 1. first ring body; 2. second ring body; 3. slot; 4. block; 5. mounting slot; 6. sleeve; 7. locking rod; 8. first spring; 9. locking slot; 10. pre-load cylinder; 11. rolling rod; 12. inclined frame pressure frame; 13. limit slot; 14. cross bar; 15. second spring; 16. positioning slide slot; 17. positioning slider. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0021] See also Figure 1-6 The utility model provides a technical solution: a steam seal ring for a steam turbine, comprising a first ring body 1 and a second ring body 2, wherein the second ring body 2 is arranged on one side of the first ring body 1, a card slot 3 is provided on the top and bottom of one side of the second ring body 2, and a card block 4 used in conjunction with the card slot 3 is fixedly connected to the top and bottom of one side of the first ring body 1,

[0022] Furthermore, in order to facilitate the automatic fixed assembly of the first ring body 1 and the second ring body 2, an installation groove 5 is provided on the inner wall of the slot 3, and the opposite sides of the inner cavities of the two installation grooves 5 are fixedly connected with sleeves 6, the internal sliding connection of the sleeve 6 is connected to the locking rod 7, and a first spring 8 is fixedly connected between the locking rod 7 and the sleeve 6, and the opposite sides of the two clamping blocks 4 are provided with locking grooves 9 for matching with the locking rod 7, and the internal elastic sliding of the slot 3 is provided with a pre-compression cylinder 10 for matching with the locking rod 7, and one side of the inner cavity of the slot 3 is fixedly connected with a cross bar 14 for matching with the pre-compression cylinder 10, and a second spring 15 is fixedly connected between the cross bar 14 and the pre-compression cylinder 10.

[0023] Furthermore, in order to facilitate unlocking of the locking rod 7 and the locking groove 9, roller rods 11 are rotatably arranged on both sides of the locking rod 7, and an inclined frame pressure frame 12 used in conjunction with the roller rod 11 is arranged on the front side of the inner cavity of the mounting groove 5. Limiting through grooves 13 used in conjunction with the inclined frame pressure frame 12 are provided on the top and bottom of the front side of the second ring body 2, and positioning slide grooves 16 are provided on both sides of the inner cavity of the mounting groove 5. A positioning slider 17 is slidably connected to the interior of the positioning slide groove 16, and the opposite sides of the two positioning sliders 17 are fixedly connected to the two sides of the inclined frame pressure frame 12 respectively.

[0024] When in use, the engagement of the block 4 and the slot 3 is used to cause the first ring body 1 and the second ring body 2 to dock. When the block 4 enters the slot 3, the block 4 engages with the preloading cylinder 10 and simultaneously drives the preloading cylinder 10 to move to the left. As the preloading cylinder 10 and the block 4 move synchronously, the locking rod 7 squeezed and retracted by the preloading cylinder 10 will move to the front side of the block 4. When the locking groove 9 on the front side of the block 4 coincides with the locking rod 7, the locking rod 7 automatically locks the block 4.

[0025] When it is necessary to separate the first ring body 1 and the second ring body 2, the inclined frame pressing frame 12 is pressed by the pushing rod device, and the inclined frame pressing frame 12 is forced to descend and squeeze the roller rod 11. The roller rod 11 withdraws and drives the locking rod 7 to retract into the interior of the sleeve 6, causing the locking rod 7 to disengage from the locking groove 9, and the corresponding pre-compression cylinder 10 is reset elastically with the second spring 15, causing the pre-compression cylinder 10 to push the block 4 outward.

Claims

1. A steam seal ring for a steam turbine, comprising a first ring body (1) and a second ring body (2), wherein the second ring body (2) is arranged on one side of the first ring body (1), characterized in that: A clamping groove (3) is provided at the top and bottom of one side of the second ring body (2); a clamping block (4) matched with the clamping groove (3) is fixedly connected at the top and bottom of one side of the first ring body (1); a mounting groove (5) is provided on the inner wall of the clamping groove (3); sleeves (6) are fixedly connected to the opposite sides of the inner cavities of the two mounting grooves (5); a locking rod (7) is slidably connected inside the sleeve (6); a first spring (8) is fixedly connected between the locking rod (7) and the sleeve (6); a locking groove (9) matched with the locking rod (7) is provided on the opposite sides of the two clamping blocks (4); a pre-compression cylinder (10) matched with the locking rod (7) is elastically slidably provided inside the clamping groove (3).

2. A steam seal ring for a steam turbine according to claim 1, characterized in that: Rolling rods (11) are rotatably arranged on both sides of the locking rod (7), an inclined frame pressing frame (12) matched with the rolling rod (11) is arranged on the front side of the inner cavity of the installation groove (5), and limiting through grooves (13) matched with the inclined frame pressing frame (12) are arranged on the top and bottom of the front side of the second ring body (2).

3. A steam seal ring for a steam turbine according to claim 1, characterized in that: A cross bar (14) matched with the pre-compression cylinder (10) is fixedly connected to one side of the inner cavity of the clamping slot (3), and a second spring (15) is fixedly connected between the cross bar (14) and the pre-compression cylinder (10).

4. A steam seal ring for a steam turbine according to claim 1, characterized in that: Positioning slide grooves (16) are provided on both sides of the inner cavity of the installation groove (5), and a positioning slider (17) is slidably connected inside the positioning slide groove (16).

5. A steam seal ring for a steam turbine according to claim 4, characterized in that: The opposite sides of the two positioning slide blocks (17) are respectively fixedly connected to the two sides of the inclined frame pressing frame (12).

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