CN112627906B - Novel steam turbine steam seal and assembling method thereof - Google Patents
Novel steam turbine steam seal and assembling method thereof Download PDFInfo
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- CN112627906B CN112627906B CN202011531232.1A CN202011531232A CN112627906B CN 112627906 B CN112627906 B CN 112627906B CN 202011531232 A CN202011531232 A CN 202011531232A CN 112627906 B CN112627906 B CN 112627906B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D11/00—Preventing or minimising internal leakage of working-fluid, e.g. between stages
- F01D11/02—Preventing or minimising internal leakage of working-fluid, e.g. between stages by non-contact sealings, e.g. of labyrinth type
- F01D11/04—Preventing or minimising internal leakage of working-fluid, e.g. between stages by non-contact sealings, e.g. of labyrinth type using sealing fluid, e.g. steam
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2230/00—Manufacture
- F05D2230/60—Assembly methods
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- General Engineering & Computer Science (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
Abstract
The invention discloses a novel steam seal of a steam turbine and an assembly method thereof, relates to the technical field of steam seal devices for steam turbines, and aims to solve the problem that the steam seal on the market at present has poor sealing performance on gas, so that a small part of air flows out through the steam seal, and the power generation efficiency of the steam turbine is influenced. The top of supporting shoe is provided with oil blanket tooth mechanism, the intermediate position department of supporting shoe below is provided with the connecting block, the below of connecting block is provided with the vapor seal backplate, the axial one end of oil blanket tooth mechanism is provided with first side tooth, and the axial other end of oil blanket tooth mechanism is provided with second side tooth, a plurality of teeth of hindering wind have set gradually between first side tooth and the second side tooth, and be adjacent be provided with the dovetail groove between the teeth of hindering wind, the inboard of tooth of hindering wind is provided with the tooth of keeping out the wind in first interior tooth of keeping out the wind, the second and keep out the wind in the third, the outside of tooth of hindering the wind is provided with the tooth of keeping out the wind outside the third, the second tooth of keeping out the wind and the first tooth of keeping out the wind outside.
Description
Technical Field
The invention relates to the technical field of steam seal devices for steam turbines, in particular to a novel steam seal of a steam turbine and an assembling method thereof.
Background
The steam seal is installed between the dynamic and static parts of the turbine to reduce or prevent the leakage of steam and the leakage of air from the vacuum side. In order to reduce the air leakage in the gaps and ensure the normal and safe operation of the steam turbine, various steam seals are specially arranged. The structure of the steam seal can be generally divided into a labyrinth steam seal, a carbon steam seal and a water seal.
At present, the steam seal on the market has poor sealing performance on gas when in use, so that a small part of air flows out through the steam seal, and the power generation efficiency of a steam turbine is influenced, and therefore, a novel steam seal of the steam turbine and an assembly method thereof are urgently needed to solve the problems in the market.
Disclosure of Invention
The invention aims to provide a novel steam turbine steam seal to solve the problem that the existing steam seal on the market has poor sealing performance on gas during use, so that a small part of air flows out through the steam seal.
In order to achieve the purpose, the invention provides the following technical scheme: a novel steam seal of a steam turbine comprises a supporting block, wherein an oil seal tooth mechanism is arranged above the supporting block, a connecting block is arranged at the middle position below the supporting block, a steam seal back plate is arranged below the connecting block, a first side tooth is arranged at one axial end of the oil seal tooth mechanism, and the other axial end of the oil seal tooth mechanism is provided with a second side tooth, a plurality of wind blocking teeth are sequentially arranged between the first side tooth and the second side tooth, the wind blocking teeth respectively form an edge groove with the first edge tooth and the second edge tooth, a trapezoid groove is arranged between the adjacent wind blocking teeth, a V-shaped groove is arranged inside the wind blocking tooth, a first inner wind blocking tooth, a second inner wind blocking tooth and a third inner wind blocking tooth are arranged on the inner side of the wind blocking tooth, the outside of choke tooth is provided with the outer tooth that keeps out the wind of third, the outer tooth that keeps out the wind of second and the outer tooth that keeps out the wind of first, the both sides of connecting block all are provided with the limiting plate.
Preferably, one side of the first side tooth, which is close to the choke tooth, is provided with an air inlet tooth, one end of the air inlet tooth, which is far away from the first side tooth, is inclined downwards, and an air inlet auxiliary tooth is arranged below one end of the air inlet tooth, which is far away from the first side tooth, and is parallel to the first side tooth.
Preferably, the choke teeth are of a V-shaped structure, two ends of each choke tooth incline to two sides by fifteen to twenty degrees respectively, the choke teeth are fixedly connected with the supporting blocks through reinforcing angles, and one ends of the reinforcing angles far away from the choke teeth and the supporting blocks are of arc-shaped structures.
Preferably, keep out the wind tooth in the first top that keeps out the wind in being located the second, and keep out the wind tooth in the third below that keeps out the wind tooth in being located the second, keep out the wind tooth in first, the second and keep out the wind tooth in the third and be provided with interior windproof auxiliary tooth near the below of choke tooth central line one side, keep out the wind tooth and support block parallel in the first, keep out the wind tooth in the second and be close to the one end tilt up of choke tooth central line, and keep out the wind tooth in the third and be close to the one end tilt up of choke tooth central line, the inclination of keeping out the wind tooth in the second is greater than the inclination of keeping out the wind tooth in the first inclination that keeps out the wind tooth is less than the inclination of third.
Preferably, the inner wind-proof auxiliary teeth are respectively perpendicular to the first inner wind-proof teeth and the second inner wind-proof teeth, and the inner wind-proof auxiliary teeth under the third inner wind-proof teeth are parallel to the first side teeth.
Preferably, the outer wind tooth that keeps out the wind of third is located the below of the outer wind tooth that keeps out the wind of second, and just first outer wind tooth that keeps out the wind is located the top of the outer wind tooth that keeps out the wind of second, the outer wind tooth that keeps out the wind of third, second and first outer wind tooth that keeps out the wind keep away from the equal downward sloping of one end of choke tooth, and the outer inclination that keeps out the wind tooth of second is greater than the outer inclination that keeps out the wind tooth of third and is less than the inclination of the outer wind tooth that keeps out the wind of first.
Preferably, the third outer wind-shielding tooth, the second outer wind-shielding tooth and the first outer wind-shielding tooth are provided with outer auxiliary wind-shielding teeth below the side far away from the wind-shielding tooth, and the outer auxiliary wind-shielding teeth are respectively perpendicular to the third outer wind-shielding tooth, the second outer wind-shielding tooth and the first outer wind-shielding tooth.
Preferably, the limiting plate is connected with the connecting block in a welded mode, scale marks are arranged at the two ends and the middle position of the two side surfaces of the connecting block, sealing rubber pads are symmetrically arranged on the two sides of the lower end of the connecting block, back plate sealing grooves are symmetrically arranged on the two sides of the upper end of the steam seal back plate, and a back plate sliding groove is formed in the middle of the lower end of the steam seal back plate.
Preferably, one side of one end of the steam sealing back plate, the connecting block, the supporting block and the oil sealing tooth mechanism is provided with a first wind blocking lug, the other side of one end of the steam sealing back plate, the connecting block, the supporting block and the oil sealing tooth mechanism is provided with a first wind blocking lug groove, the first wind blocking lug groove is matched with the first wind blocking lug, one side of the other end of the steam sealing back plate, the connecting block, the supporting block and the oil sealing tooth mechanism is provided with a second wind blocking lug, the other side of the other end of the steam sealing back plate, the connecting block, the supporting block and the oil sealing tooth mechanism is provided with a second wind blocking lug, and the second wind blocking lug is matched with the second wind blocking lug groove.
The assembling method of the novel steam turbine gland seal comprises the following steps:
step 1: firstly, a steam seal is installed, a steam seal back plate of the steam seal is aligned with a steam seal back plate groove on a steam turbine shell, and then the steam seal back plate can be installed in the steam seal back plate groove in a sliding mode;
step 2: then, the adjacent steam seal is installed, the second wind blocking convex block corresponds to the second wind blocking convex block groove, the first wind blocking convex block corresponds to the first wind blocking convex block groove, and at the moment, the steam seal back plate is installed in the steam seal back plate groove in a sliding mode;
and step 3: when the steam seal installed is different, the gap between the steam seal and the rotor is correspondingly adjusted according to the position of the steam seal, the distance close to the left side of the rotor is larger than the distance close to the right side of the rotor, after the distance is determined according to the scale marks, the distance between the supporting block and the steam turbine is fixed by welding the limiting plate, then the last steam seal is installed, and the gap is adjusted through the limiting plate.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention forms the side groove, the V-shaped groove and the trapezoid groove by arranging the first side tooth, the wind blocking tooth and the second side tooth, when air enters the side groove, the air firstly enters the side groove, is guided by the wind blocking tooth and the reinforcement angle to rotate towards the wind inlet tooth, so that the air is weakened by the wind inlet tooth and the wind inlet auxiliary tooth, then enters the V-shaped groove, is blocked by the first inner wind blocking tooth, the second inner wind blocking tooth, the third inner wind blocking tooth and the inner wind blocking auxiliary tooth, so that the wind is weakened again, the wind enters the trapezoid groove, and the third outer wind blocking tooth, the second outer wind blocking tooth, the first outer wind blocking tooth and the outer wind blocking tooth block the wind, so that the wind pressure and the wind direction are dispersed, the air entering the rotor and the steam sealing gap can be effectively weakened by the multilayer V-shaped groove and the trapezoid groove, so that the air sealing performance of the steam seal on the market is not good enough when the steam seal is used, leading to the problem that a small part of air flows out through the gland seal, thereby influencing the generating efficiency of the steam turbine.
2. According to the steam seal limiting device, the limiting plate and the scale mark are arranged, a worker can limit the distance between the rotor and the steam seal according to the installation position of the steam seal, so that the problem that the rotor normally rotates clockwise to enable the left side gap to be larger than the right side gap and difficult to adjust is solved, the supporting block and the limiting plate are connected in a welding mode, the limiting plate is attached to the inner wall of the steam turbine shell, and therefore effective limiting of the steam seal is achieved.
Drawings
FIG. 1 is a first perspective view of the present invention;
FIG. 2 is a cross-sectional view of the present invention;
FIG. 3 is an enlarged view of a portion of the area A according to the present invention;
FIG. 4 is a second perspective view of the present invention;
fig. 5 is a side view of the present invention.
In the figure: 1. a vapor seal backing plate; 2. connecting blocks; 3. a support block; 4. an oil seal tooth mechanism; 5. sealing the rubber pad; 6. a backplate seal groove; 7. a back plate chute; 8. a first toothing; 9. a side groove; 10. air inlet teeth; 11. air intake auxiliary teeth; 12. a choke tooth; 13. a V-shaped groove; 14. a trapezoidal groove; 15. a first inner wind-shielding tooth; 16. a second inner wind-shielding tooth; 17. a third inner wind-shielding tooth; 18. inner windproof auxiliary teeth; 19. a third outer wind-shielding tooth; 20. a second outer wind-shielding tooth; 21. a first outer wind-shielding tooth; 22. an outer auxiliary wind-shielding tooth; 23. reinforcing corners; 24. a second wind blocking lug groove; 25. a first wind-shielding bump; 26. a first wind-shielding bump groove; 27. a second wind blocking bump; 28. a second toothing; 29. a limiting plate; 30. and (4) marking the scales.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Referring to fig. 1-5, an embodiment of the present invention is shown: a novel steam seal of a steam turbine comprises a supporting block 3, an oil seal tooth mechanism 4 is arranged above the supporting block 3, a connecting block 2 is arranged at the middle position below the supporting block 3, a steam seal back plate 1 is arranged below the connecting block 2, a first side tooth 8 is arranged at one axial end of the oil seal tooth mechanism 4, a second side tooth 28 is arranged at the other axial end of the oil seal tooth mechanism 4, a plurality of wind blocking teeth 12 are sequentially arranged between the first side tooth 8 and the second side tooth 28, side grooves 9 are respectively formed between the wind blocking teeth 12 and the first side tooth 8 and the second side tooth 28, a trapezoidal groove 14 is arranged between adjacent wind blocking teeth 12, a V-shaped groove 13 is arranged inside the wind blocking teeth 12, a first inner wind blocking tooth 15, a second inner wind blocking tooth 16 and a third inner wind blocking tooth 17 are arranged on the inner side of the wind blocking teeth 12, a third outer wind blocking tooth 19, a second outer wind blocking tooth 20 and a first outer wind blocking tooth 21 are arranged on the outer side of the wind blocking teeth 12, limiting plates 29 are arranged on two sides of the connecting block 2.
Further, one side of the first side tooth 8 close to the choke tooth 12 is provided with an air inlet tooth 10, one end of the air inlet tooth 10 far away from the first side tooth 8 inclines downwards, an air inlet auxiliary tooth 11 is arranged below the end of the air inlet tooth 10 far away from the first side tooth 8, and the air inlet auxiliary tooth 11 is parallel to the first side tooth 8.
Furthermore, the choke tooth 12 is in a V-shaped structure, two ends of the choke tooth 12 incline to two sides for fifteen to twenty degrees respectively, the choke tooth 12 is fixedly connected with the supporting block 3 through a reinforcing angle 23, and one end of the reinforcing angle 23, which is far away from the choke tooth 12 and the supporting block 3, is in an arc-shaped structure.
Further, the first inner wind-shielding tooth 15 is located above the second inner wind-shielding tooth 16, the third inner wind-shielding tooth 17 is located below the second inner wind-shielding tooth 16, an inner wind-shielding auxiliary tooth 18 is arranged below one side, close to the central line of the wind-shielding tooth 12, of the first inner wind-shielding tooth 15, the second inner wind-shielding tooth 16 and the third inner wind-shielding tooth 17, the first inner wind-shielding tooth 15 is parallel to the supporting block 3, one end, close to the central line of the wind-shielding tooth 12, of the second inner wind-shielding tooth 16 inclines upwards, one end, close to the central line of the wind-shielding tooth 12, of the third inner wind-shielding tooth 17 inclines upwards, and the inclination angle of the second inner wind-shielding tooth 16 is larger than that of the first inner wind-shielding tooth 15 and smaller than that of the third inner wind-shielding tooth 17.
Further, the inner wind-proof auxiliary tooth 18 is perpendicular to the first inner wind-proof tooth 15 and the second inner wind-proof tooth 16, respectively, and the inner wind-proof auxiliary tooth 18 under the third inner wind-proof tooth 17 is parallel to the first side tooth 8.
Further, the third outer wind-shielding tooth 19 is located below the second outer wind-shielding tooth 20, the first outer wind-shielding tooth 21 is located above the second outer wind-shielding tooth 20, one ends of the third outer wind-shielding tooth 19, the second outer wind-shielding tooth 20 and the first outer wind-shielding tooth 21, which are far away from the wind-shielding tooth 12, are all inclined downwards, and the inclination angle of the second outer wind-shielding tooth 20 is larger than that of the third outer wind-shielding tooth 19 and is smaller than that of the first outer wind-shielding tooth 21.
Further, an outer auxiliary wind-shielding tooth 22 is arranged below one side of the third outer wind-shielding tooth 19, the second outer wind-shielding tooth 20 and the first outer wind-shielding tooth 21 far away from the wind-shielding tooth 12, and the outer auxiliary wind-shielding tooth 22 is respectively perpendicular to the third outer wind-shielding tooth 19, the second outer wind-shielding tooth 20 and the first outer wind-shielding tooth 21.
Further, limiting plate 29 and connecting block 2 welded connection, the both ends and the intermediate position on connecting block 2 both sides surface all are provided with scale mark 30, and the bilateral symmetry of connecting block 2 lower extreme is provided with sealing rubber pad 5, and the both sides of gland seal backplate 1 upper end all symmetry are provided with backplate seal groove 6, and the centre of gland seal backplate 1 lower extreme is provided with backplate spout 7.
Further, one side of the steam seal back plate 1, the connecting block 2, one side of one end of the supporting block 3 and the oil seal tooth mechanism 4 is provided with a first wind blocking convex block 25, and the steam seal back plate 1, the connecting block 2, the other side of one end of the supporting block 3 and the oil seal tooth mechanism 4 is provided with a first wind blocking convex block groove 26, the first wind blocking convex block groove 26 is matched with the first wind blocking convex block 25, the steam seal back plate 1, the connecting block 2, one side of the other end of the supporting block 3 and the oil seal tooth mechanism 4 is provided with a second wind blocking convex block groove 24, and the other side of the other end of the steam seal back plate 1, the connecting block 2, the supporting block 3 and the oil seal tooth mechanism 4 is provided with a second wind blocking convex block 27, and the second wind blocking convex block 27 is matched with the second wind blocking convex block groove 24.
The assembling method of the novel steam turbine gland seal comprises the following steps:
step 1: firstly, a steam seal is installed, a steam seal back plate 1 of the steam seal is aligned with a steam seal back plate groove on a steam turbine shell, and then the steam seal back plate 1 can be installed in the steam seal back plate groove in a sliding mode;
step 2: then, the adjacent steam seal is installed, the second wind blocking lug 27 corresponds to the second wind blocking lug groove 24, the first wind blocking lug 25 corresponds to the first wind blocking lug groove 26, and at the moment, the steam seal back plate 1 is installed in the steam seal back plate groove in a sliding mode;
and step 3: when the steam seals are different from each other, the gap between the steam seal and the rotor is correspondingly adjusted according to the positions of the steam seals, the distance close to the left side of the rotor is larger than the distance close to the right side of the rotor, after the distance is determined according to the scale marks 30, the distance between the supporting block 3 and the steam turbine is fixed by welding the limiting plate 29, the last steam seal is installed, and the gap is adjusted through the limiting plate 29.
The working principle is as follows: when the air-blocking type wind-blocking device is used, air enters through one side of the first side tooth 8, a part of the air enters the V-shaped groove 13, a part of the air enters the side groove 9 along the wind-blocking tooth 12, the air in the side groove 9 flows to the first side tooth 8 along the guide of the wind-blocking tooth 12, the reinforcing angle 23 and the supporting block 3 and is partially reduced, the air is blocked through the wind-inlet tooth 10 and the wind-inlet auxiliary tooth 11 arranged on the first side tooth 8, so that the flow rate and the impact force of the air are weakened, the air entering the V-shaped groove 13 is blocked by the first inner wind-blocking tooth 15, the second inner wind-blocking tooth 16, the third inner wind-blocking tooth 17 and the inner wind-blocking auxiliary tooth 18, so that the flow rate and the impact force of the air are weakened, the inner wind-blocking teeth arranged at different angles guide the air flowing in different angles to improve the air blocking effect, the air enters the interior of the trapezoid-shaped groove 14, and the air flows towards the third outer wind-blocking tooth 19 through the reinforcing angle 23 of the wind-blocking tooth 12 and the supporting block 3, the third outer wind-shielding tooth 19, the second outer wind-shielding tooth 20, the first outer wind-shielding tooth 21 and the outer auxiliary wind-shielding tooth 22 are blocked, so that the flow speed and the impact force of air are reduced, and the air entering the rotor and the steam seal gap can be effectively weakened through the V-shaped grooves 13 and the trapezoidal grooves 14 to be blocked and weakened layer by layer so as to be reduced.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (10)
1. The utility model provides a novel steam turbine gland, includes supporting shoe (3), its characterized in that: the oil seal tooth mechanism (4) is arranged above the supporting block (3), the connecting block (2) is arranged at the middle position below the supporting block (3), the steam seal back plate (1) is arranged below the connecting block (2), a plurality of wind blocking teeth (12) are sequentially arranged between the first side tooth (8) and the second side tooth (28), a first side tooth (8) is arranged at one axial end of the oil seal tooth mechanism (4), a second side tooth (28) is arranged at the other axial end of the oil seal tooth mechanism (4), side grooves (9) are formed between the wind blocking teeth (12) and the first side tooth (8) and the second side tooth (28) respectively, the wind blocking teeth are adjacent to each other, a trapezoidal groove (14) is arranged between the wind blocking teeth (12), a V-shaped groove (13) is arranged inside the wind blocking teeth (12), and a first inner wind blocking tooth (15) is arranged on the inner side of the wind blocking teeth (12), Keep out wind tooth (16) and third in the second, keep out wind tooth (17) in the outside of hindering wind tooth (12) is provided with the third outside and keeps out wind tooth (19), the second outside keep out wind tooth (20) and first outside keep out wind tooth (21), the both sides of connecting block (2) all are provided with limiting plate (29).
2. The new steam turbine gland seal according to claim 1 wherein: one side that first side tooth (8) are close to choke tooth (12) is provided with air inlet tooth (10), and air inlet tooth (10) keep away from the one end downward sloping of first side tooth (8), the below that first side tooth (8) one end was kept away from in air inlet tooth (10) is provided with supplementary tooth of air inlet (11), and supplementary tooth of air inlet (11) are parallel with first side tooth (8).
3. The new steam turbine gland seal according to claim 1 wherein: the wind blocking teeth (12) are of a V-shaped structure, two ends of each wind blocking tooth (12) incline to two sides for fifteen to twenty degrees respectively, the wind blocking teeth (12) are fixedly connected with the supporting blocks (3) through reinforcing angles (23), and one ends, far away from the wind blocking teeth (12) and the supporting blocks (3), of the reinforcing angles (23) are of arc-shaped structures.
4. The new steam turbine gland seal according to claim 1 wherein: keep out wind tooth (15) in the first top that keeps out wind tooth (16) in being located the second, and keep out wind tooth (17) in the third and be located the below of keeping out wind tooth (16) in the second, keep out wind tooth (16) in first interior wind tooth (15), the second and keep out wind tooth (17) in the third and be provided with in the below that is close to wind tooth (12) central line one side and prevent wind auxiliary tooth (18), keep out wind tooth (15) and supporting shoe (3) parallel in the first, keep out wind tooth (16) in the second and be close to the one end tilt up of wind tooth (12) central line, and keep out wind tooth (17) in the third and be close to the one end tilt up of wind tooth (12) central line, the inclination that keeps out wind tooth (16) in the second is greater than the inclination that first interior wind tooth (15) that keeps out wind tooth (17) is less than the inclination of third.
5. The new turbine gland seal according to claim 4 wherein: the inner windproof auxiliary teeth (18) are respectively vertical to the first inner windproof teeth (15) and the second inner windproof teeth (16), and the inner windproof auxiliary teeth (18) below the third inner windproof teeth (17) are parallel to the first side teeth (8).
6. The new steam turbine gland seal according to claim 1 wherein: the third keeps out the wind tooth (19) outside and is located the below of the second tooth (20) that keeps out the wind outside, and the first tooth (21) that keeps out the wind outside is located the top of the second tooth (20) that keeps out the wind outside, the third keeps out the wind tooth (19), the second tooth (20) and the first tooth (21) that keeps out the wind outside and keeps away from the equal downward sloping of one end that the tooth (12) kept away from the wind, and the second tooth (20) that keeps out the wind outside inclination that is greater than the third tooth (19) that keeps out the wind outside is less than the inclination of the first tooth (21) that keeps out the wind outside.
7. The new steam turbine gland seal according to claim 1 wherein: the third outer wind-shielding tooth (19), the second outer wind-shielding tooth (20) and the first outer wind-shielding tooth (21) are provided with outer auxiliary wind-shielding teeth (22) below one side far away from the wind-shielding tooth (12), and the outer auxiliary wind-shielding teeth (22) are respectively perpendicular to the third outer wind-shielding tooth (19), the second outer wind-shielding tooth (20) and the first outer wind-shielding tooth (21).
8. The new steam turbine gland seal according to claim 1 wherein: limiting plate (29) and connecting block (2) welded connection, the both ends and the intermediate position on connecting block (2) both sides surface all are provided with scale mark (30), the bilateral symmetry of connecting block (2) lower extreme is provided with sealing rubber pad (5), the equal symmetry in both sides of vapor seal backplate (1) upper end is provided with backplate seal groove (6), the centre of vapor seal backplate (1) lower extreme is provided with backplate spout (7).
9. The new turbine gland seal according to claim 8 wherein: one side of one end of the steam seal back plate (1), the connecting block (2), the supporting block (3) and the oil seal tooth mechanism (4) is provided with a first wind blocking convex block (25), the other side of one end of the steam seal back plate (1), the connecting block (2), the supporting block (3) and the oil seal tooth mechanism (4) is provided with a first wind blocking convex block groove (26), the first wind blocking convex block groove (26) is matched with the first wind blocking convex block (25), one side of the other end of the steam seal back plate (1), the connecting block (2), the supporting block (3) and the oil seal tooth mechanism (4) is provided with a second wind blocking convex block groove (24), the other side of the other end of the steam seal back plate (1), the connecting block (2), the supporting block (3) and the oil seal tooth mechanism (4) is provided with a second wind blocking convex block groove (27), and the second wind blocking convex block groove (24) is matched with the second wind blocking convex block groove (27).
10. The method for assembling the novel steam turbine gland seal according to claim 9, comprising the steps of:
step 1: firstly, a steam seal is installed, a steam seal back plate (1) of the steam seal is aligned with a steam seal back plate groove on a steam turbine shell, and then the steam seal back plate (1) can be installed in the steam seal back plate groove in a sliding mode;
step 2: then, an adjacent steam seal is installed, the second wind blocking lug (27) corresponds to the second wind blocking lug groove (24), the first wind blocking lug (25) corresponds to the first wind blocking lug groove (26), and at the moment, the steam seal back plate (1) is installed in the steam seal back plate groove in a sliding mode;
and step 3: when the steam seals are different from each other, the gap between the steam seal and the rotor is correspondingly adjusted according to the positions of the steam seals, the distance close to the left side of the rotor is larger than the distance close to the right side of the rotor, after the distance is determined according to the scale marks (30), the distance between the supporting block (3) and the steam turbine is fixed by welding the limiting plate (29), the last steam seal is installed, and the gap is adjusted through the limiting plate (29).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011531232.1A CN112627906B (en) | 2020-12-22 | 2020-12-22 | Novel steam turbine steam seal and assembling method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011531232.1A CN112627906B (en) | 2020-12-22 | 2020-12-22 | Novel steam turbine steam seal and assembling method thereof |
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| Publication Number | Publication Date |
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| CN112627906A CN112627906A (en) | 2021-04-09 |
| CN112627906B true CN112627906B (en) | 2022-03-25 |
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| CN115704321A (en) * | 2021-08-03 | 2023-02-17 | 中国航发商用航空发动机有限责任公司 | Sealing structure and sealing labyrinth thereof |
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| CN105874249A (en) * | 2014-01-30 | 2016-08-17 | 三菱日立电力系统株式会社 | Seal structure and rotating machine |
| CN206190329U (en) * | 2016-11-21 | 2017-05-24 | 秦皇岛华宇通电力科技有限公司 | Modified comb -tooth type vapor seal |
| CN210264829U (en) * | 2019-09-03 | 2020-04-07 | 秦皇岛华宇通电力科技有限公司 | Novel vortex side tooth steam seal |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP6650383B2 (en) * | 2016-10-13 | 2020-02-19 | 株式会社神戸製鋼所 | Labyrinth seal |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105874249A (en) * | 2014-01-30 | 2016-08-17 | 三菱日立电力系统株式会社 | Seal structure and rotating machine |
| CN206190329U (en) * | 2016-11-21 | 2017-05-24 | 秦皇岛华宇通电力科技有限公司 | Modified comb -tooth type vapor seal |
| CN210264829U (en) * | 2019-09-03 | 2020-04-07 | 秦皇岛华宇通电力科技有限公司 | Novel vortex side tooth steam seal |
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| CN112627906A (en) | 2021-04-09 |
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Address after: 211135 Room 201, 11th floor, building a, qiaomeng garden, Nanjing, Jiangsu, No. 100, Tianjiao Road, Qilin science and Technology Innovation Park, Nanjing, Jiangsu Patentee after: Nanjing Lilan power energy saving Technology Co.,Ltd. Address before: 211100 room 901, building 9, Cuiping International Plaza, 20 Jiangjun Avenue, moling street, Jiangning District, Nanjing City, Jiangsu Province (Jiangning Development Zone) Patentee before: Nanjing Lilan power energy saving Technology Co.,Ltd. |