Elastic comb tooth steam seal

Abstract

The utility model belongs to the field of comb tooth steam seals, and particularly relates to an elastic comb tooth steam seal which comprises a steam seal body, a steam seal ring is arranged on the inner wall of the steam seal body, a plurality of comb tooth plates are arranged on the inner wall of the steam seal ring, and connecting structures are arranged on the surfaces of the comb tooth plates. The comb plates are connected with the steam seal ring through the connecting structures, the steam seal ring is connected with the steam seal body, the comb plates are close to a rotor to enable steam to flow, during replacement, the fixing nuts are detached, the fixing bolts are pulled out of the first inserting holes and the second inserting holes, and the inserting pieces are pulled out of the inserting grooves of the comb plates needing to be replaced. According to the comb plate, the disassembly and assembly convenience of the comb plate and the steam seal ring is improved through the inserting piece, the elastic reinforcing block in the inner cavity of the inserting piece abuts against the inner wall of the inserting groove, the inserting firmness of the inserting piece and the inserting groove is improved in cooperation with the resistance increasing layer made of the rubber material, and the effect that the single comb plate is replaced according to different abrasion degrees is achieved.

Description

Technical Field

[0001] The utility model relates to the field of comb-tooth steam seals, in particular to an elastic comb-tooth steam seal. Background Art

[0002] The comb-tooth steam seal is made by turning many cooperating comb teeth and concave and convex shoulders on the inner circle of the steam seal ring and the outer circle of the steam seal sleeve (the high-temperature part is the rotor shaft), forming a tiny annular gap (called the steam seal gap) and a steam expansion chamber. When the leaked high-speed steam flow passes through these smaller steam seal gaps, it will expand and slow down in the steam expansion chamber. This device uses a step-by-step throttling and deceleration method to reduce axial leakage of steam.

[0003] Most traditional steam seal rings and comb teeth are processed as one piece. The comb teeth are in contact with high-temperature steam for a long time and will have a certain contact with the rotor, causing wear, which increases the loss of the comb teeth. The comb teeth steam seal needs to be maintained and replaced regularly. However, the one-piece processing method makes it inconvenient to replace the comb teeth on the steam seal ring individually. Once replaced, the entire comb teeth must be dismantled, which increases maintenance time and reduces maintenance efficiency. Utility Model Content

[0004] In order to make up for the shortcomings of the existing technology, the integrated processing method makes it inconvenient to replace the comb teeth components on the steam seal ring. Once replaced, the entire component must be dismantled, which increases maintenance time and reduces maintenance efficiency. The utility model proposes an elastic comb teeth steam seal.

[0005] The technical solution adopted by the utility model to solve the technical problem is: an elastic comb-tooth steam seal, comprising a steam seal body, a steam seal ring provided on the inner wall of the steam seal body, and comb-tooth plates on the inner wall of the steam seal ring, wherein the number of the comb-tooth plates is several, and the surfaces of the comb-tooth plates are all provided with a connection structure;

[0006] The connection structure includes a connector, one side of which is fixedly connected to the surface of the comb plate, a slot is provided on the inner wall of the steam seal ring, the surface of the connector is movably connected to the inner wall of the slot, the inner cavity of the connector is slidably connected to an elastic reinforcement block, one side of the elastic reinforcement block is fixedly connected to a resistance increasing layer, and the surface of the resistance increasing layer is adhered to the inner wall of the slot.

[0007] Preferably, a first plug hole is provided on one side of the steam seal ring, a second plug hole is provided on one side of the connector, and the inner wall of the first plug hole is connected to the inner wall of the second plug hole.

[0008] Preferably, a fixing bolt is movably connected to the inner wall of the first insertion hole and the inner wall of the second insertion hole, and a fixing nut is threadedly connected to the surface of the bolt rod of the fixing bolt.

[0009] Preferably, the inner cavity of the steam seal body is provided with a butt joint groove, and the surface of the steam seal ring is fixedly connected with a butt joint ring, and the surface of the butt joint ring is slidably connected to the inner wall of the butt joint groove.

[0010] Preferably, the inner wall of the butt joint groove is fixedly connected with a damping telescopic rod, the number of the damping telescopic rods is several, one end of each of the damping telescopic rods is fixedly connected with a reinforcing plate, and one side of the reinforcing plate is attached to the surface of the butt joint ring.

[0011] Preferably, the surface of the damping telescopic rod is sleeved with a spring, one end of the spring is fixedly connected to the surface of the reinforcing plate, and the other end of the spring is fixedly connected to the inner wall of the butt joint groove.

[0012] Preferably, one side of the reinforcing plate is fixedly connected with an anti-skid particle, and the material of the anti-skid particle is rubber material.

[0013] The utility model discloses the beneficial effect lies in:

[0014] The utility model discloses a plurality of comb toothed plates are connected with the steam seal ring through the connecting structure, the steam seal ring is connected with the steam seal body, and the comb toothed plate is close to the rotor to make steam flow, and the long -time use makes part comb toothed plate produce abrasion, and when replacing, removes fixed nut, and fixed peg is pulled out from first insertion hole and second insertion hole, and the comb toothed plate is pulled out from the insertion groove, and the comb toothed plate improves the convenience of dismounting with the steam seal ring through the insertion piece, and the elastic reinforcing block of the insertion piece inner chamber abuts the inner wall of the insertion groove, and cooperates with the rubber material's resistance layer and improves the firmness of insertion piece and insertion groove insertion, reaches according to different abrasion degree and replaces single comb toothed plate effect, solves the processing mode of integral type and makes the comb toothed part on the steam seal ring inconveniently replace single comb toothed piece, and once replacement is the whole removal, and the maintenance time is increased, and the maintenance efficiency is reduced and the like problem. ACCURACY

[0015] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can be obtained without creative labor on the premise of the drawings.

[0016] Figure 1 It is the whole structure perspective schematic view of the utility model;

[0017] Figure 2 It is the comb toothed plate structure perspective schematic view of the utility model;

[0018] Figure 3 It is the comb toothed plate and steam seal ring connection schematic view of the utility model;

[0019] Figure 4 It is the butt joint groove inner wall structure perspective view of the utility model;

[0020] Figure 5 It is the butt joint groove inner wall structure perspective view of the utility model;

[0021] In the figure: 1, steam seal body;2, steam seal ring;3, comb plate;4, connecting structure;401, plug-in part;402, elastic reinforcing block;403, resistance increasing layer;5, insertion slot;6, first insertion hole;7, second insertion hole;8, fixing bolt;9, fixing nut;10, butt joint groove;11, butt joint ring;12, damping telescopic rod;13, reinforcing plate;14, spring;15, anti-skid particle. DETAILED DESCRIPTION

[0022] The technical solutions 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, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the utility model.

[0023] The following will be combined with the drawings in the embodiments of the utility model, Figures 1-5 The application will be further described in detail,

[0024] The embodiments of the application disclose a kind of elastic comb steam seal. Refer to Figures 1 to 3 A kind of elastic comb steam seal, including steam seal body 1, the inner wall of steam seal body 1 is provided with steam seal ring 2, the inner wall comb plate 3 of steam seal ring 2, the number of comb plate 3 is several, the surface of comb plate 3 is all provided with connecting structure 4;

[0025] The connecting structure 4 comprises a plug 401, one side of the plug 401 is fixedly connected to the surface of the comb plate 3, the inner wall of the steam seal ring 2 is provided with a plug groove 5, the surface of the plug 401 is movably plugged into the inner wall of the plug groove 5, the inner cavity of the plug 401 is slidably connected with an elastic reinforcing block 402, one side of the elastic reinforcing block 402 is fixedly connected with a resistance increasing layer 403, the surface of the resistance increasing layer 403 is attached to the inner wall of the plug groove 5, one side of the steam seal ring 2 is provided with a first insertion hole 6, one side of the plug 401 is provided with a second insertion hole 7, the inner wall of the first insertion hole 6 and the inner wall of the second insertion hole 7 are through, the inner wall of the first insertion hole 6 and the inner wall of the second insertion hole 7 movably plug a fixing pin 8, the shank surface of the fixing pin 8 is threadedly connected with a fixing nut 9, the elastic comb steam seal is formed by connecting the plurality of comb plates 3 with the steam seal ring 2 through the connecting structure 4, the steam seal ring 2 is connected with the steam seal body 1, the comb plate 3 is close to the rotor to make the steam flow, long-term use makes part of the comb plate 3 worn, when replacing, the fixing nut 9 is removed, the fixing pin 8 is pulled out of the first insertion hole 6 and the second insertion hole 7, the comb plate 3 to be replaced pulls out the plug 401 from the plug groove 5, the comb plate 3 improves the convenience of disassembly and assembly with the steam seal ring 2 through the plug 401, the elastic reinforcing block 402 in the inner cavity of the plug 401 abuts against the inner wall of the plug groove 5, and the resistance increasing layer 403 of rubber material is matched to improve the firmness of the plug 401 and the plug groove 5.

[0026] With reference to Figure 4 The inner cavity of the steam seal body 1 is provided with a butt joint groove 10, the surface of the steam seal ring 2 is fixedly connected with a butt joint ring 11, the surface of the butt joint ring 11 is slidably connected to the inner wall of the butt joint groove 10, through the arrangement of the butt joint ring 11, the cooperation of the butt joint ring 11 and the butt joint groove 10 improves the convenience of connecting the steam seal ring 2 with the steam seal body 1.

[0027] With reference to Figure 4 The inner wall of the butt joint groove 10 is fixedly connected with a damping telescopic rod 12, the number of the damping telescopic rod 12 is several, one end of the damping telescopic rod 12 is fixedly connected with a reinforcing plate 13, one side of the reinforcing plate 13 is attached to the surface of the butt joint ring 11, the surface of the damping telescopic rod 12 is sleeved with a spring 14, one end of the spring 14 is fixedly connected to the surface of the reinforcing plate 13, one end of the spring 14 is fixedly connected to the inner wall of the butt joint groove 10, through the arrangement of the spring 14, the reinforcing plate 13 is connected with the butt joint groove 10 of the steam seal body 1 through the damping telescopic rod 12, the damping telescopic rod 12 can ensure the stability of the spring 14 at the same time, through the elastic support of the spring 14, the fastening effect of the reinforcing plate 13 and the butt joint ring 11 can be improved, and when the comb plate 3 rubs with the rotor, the vibration driven by the friction can be absorbed through the spring 14, prolonging the service life of the comb plate 3.

[0028] With reference to Figure 5The side of the reinforcing plate 13 is fixedly connected with anti-skid particles 15, the material of the anti-skid particles 15 is rubber material, the anti-skid particles 15 of the rubber material can increase the friction force of the reinforcing plate 13 and the abutment ring 11, and further improve the stability of the steam seal ring 2.

[0029] Working principle: the steam seal ring 2 is connected with the steam seal body 1, the abutment ring 11 and the abutment groove 10 improve the convenience of the connection between the steam seal ring 2 and the steam seal body 1, the elastic support of the spring 14 can improve the fastening effect of the reinforcing plate 13 and the abutment ring 11, when the comb tooth plate 3 rubs with the rotor, the spring 14 can absorb the vibration caused by the friction, prolong the service life of the comb tooth plate 3, the steam flows when the comb tooth plate 3 is close to the rotor, long-time use causes part of the comb tooth plate 3 to be worn, when replacing, the fixed nut 9 is removed, the fixed bolt 8 is pulled out from the first insertion hole 6 and the second insertion hole 7, the comb tooth plate 3 to be replaced is pulled out from the insertion groove 5, the comb tooth plate 3 improves the convenience of disassembly and assembly with the steam seal ring 2 through the insertion piece 401, the elastic reinforcing block 402 in the inner cavity of the insertion piece 401 abuts against the inner wall of the insertion groove 5, and the rubber material resistance layer 403 improves the firmness of the insertion of the insertion piece 401 and the insertion groove 5.

[0030] The basic principle, main features and advantages of the utility model are shown and described above. It should be understood by those skilled in the art that the utility model is not limited by the above-mentioned embodiments, the above-mentioned embodiments and the description in the specification are only to illustrate the principle of the utility model, various changes and improvements can be made to the utility model without departing from the spirit and scope of the utility model, and these changes and improvements all fall within the scope of the utility model claimed.

Claims

1. A resilient comb finger steam seal, characterized by: The utility model provides a steam seal body (1), the inner wall of steam seal body (1) is provided with steam seal ring (2), the inner wall of steam seal ring (2) is provided with comb tooth board (3), the number of comb tooth board (3) is several, the surface of comb tooth board (3) is provided with connecting structure (4); Connecting structure (4) includes the insert piece (401), one side of insert piece (401) is fixedly connected to the surface of comb tooth board (3), the inner wall of steam seal ring (2) is provided with the slot (5), the surface of insert piece (401) is movably inserted in the inner wall of slot (5), the inner chamber of insert piece (401) is slidably connected with elastic reinforcing block (402), one side of elastic reinforcing block (402) is fixedly connected with the resistance layer (403), the surface of resistance layer (403) is attached to the inner wall of slot (5).

2. A spring finger steam seal according to claim 1, wherein: One side of steam seal ring (2) is provided with first insertion hole (6), one side of insert piece (401) is provided with second insertion hole (7), the inner wall of first insertion hole (6) and the inner wall of second insertion hole (7) are through.

3. A spring finger steam seal according to claim 2, wherein: The inner wall of first insertion hole (6) and the inner wall of second insertion hole (7) movably insert fixed peg (8), the shank surface of fixed peg (8) is threadedly connected with fixed nut (9).

4. A spring finger steam seal as claimed in claim 1, wherein: The inner chamber of steam seal body (1) is provided with butt joint groove (10), the surface of steam seal ring (2) is fixedly connected with butt joint ring (11), the surface of butt joint ring (11) is slidably connected to the inner wall of butt joint groove (10).

5. A spring finger steam seal according to claim 4, wherein: The inner wall of butt joint groove (10) is fixedly connected with damping telescopic rod (12), the number of damping telescopic rod (12) is several, one end of damping telescopic rod (12) is fixedly connected with reinforcing plate (13), one side of reinforcing plate (13) is attached to the surface of butt joint ring (11).

6. A spring finger steam seal according to claim 5, wherein: The surface of damping telescopic rod (12) is provided with spring (14), one end of spring (14) is fixedly connected to the surface of reinforcing plate (13), one end of spring (14) is fixedly connected to the inner wall of butt joint groove (10).

7. A resilient comb seal according to claim 5, wherein: One side of reinforcing plate (13) is fixedly connected with anti -skid particle (15), the material of anti -skid particle (15) is rubber material.

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