CN220890262U - Cantilever rotor structure of power turbine - Google Patents
Cantilever rotor structure of power turbine Download PDFInfo
- Publication number
- CN220890262U CN220890262U CN202322961631.7U CN202322961631U CN220890262U CN 220890262 U CN220890262 U CN 220890262U CN 202322961631 U CN202322961631 U CN 202322961631U CN 220890262 U CN220890262 U CN 220890262U
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- 238000007789 sealing Methods 0.000 claims abstract description 33
- 244000126211 Hericium coralloides Species 0.000 claims description 6
- 238000005192 partition Methods 0.000 claims description 3
- 238000009434 installation Methods 0.000 abstract description 3
- 238000012423 maintenance Methods 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 238000003466 welding Methods 0.000 description 3
- 238000005493 welding type Methods 0.000 description 3
- 238000009826 distribution Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002146 bilateral effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 210000001624 hip Anatomy 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000004260 weight control Methods 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
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- Turbine Rotor Nozzle Sealing (AREA)
Abstract
The utility model discloses a cantilever rotor structure of a power turbine, belongs to the technical field of turbines, and aims to solve the problem that the technical threshold of the rotor structure of the power turbine is high. The turbine comprises a turbine shaft, a primary wheel disc and a secondary wheel disc; the turbine shaft is hollow cylinder structure shaft, and one-level rim plate and second grade rim plate cover are established on the turbine shaft, and one-level rim plate includes rim plate major structure, and rim plate major structure's inner links to each other with the one end of cantilever cylinder structure, and cantilever cylinder structure's the other end links to each other with flange structure's outer end, and one-level rim plate and second grade rim plate fore-and-aft symmetry set up, and the flange structure of one-level rim plate and the flange structure of second grade rim plate are all fixed on the flange of turbine shaft, install the inter-disc sealing ring between one-level rim plate and the second grade rim plate, and a plurality of one-level blade circumferences set up the periphery at one-level rim plate, and a plurality of second grade blade circumferences set up the periphery at the second grade rim plate. The utility model has the advantages of relatively simple structure, lower manufacturing cost, simple and easy installation and long maintenance period.
Description
Technical Field
The utility model belongs to the technical field of turbines, and particularly relates to a cantilever rotor structure of a power turbine.
Background
The gas turbine is a rotary impeller type engine, has the advantages of small volume, light weight, quick start and high power, and meanwhile, the gas turbine has a larger power-weight ratio and has very strict requirements on weight control. The rotor structure of the power turbine is also of great importance as a power take-off for the gas turbine. At present, the rotor structure of the power turbine has a plurality of forms such as a pull rod type rotor structure, a sleeve type rotor structure and a welding type rotor structure, but the pull rod type rotor structure has high performance requirements on the pull rod, the sleeve type rotor structure adopts an interference fit assembly mode, the requirements on the installation process are high, the welding type rotor structure is easy to cause welding deformation, the welding process requirements are high, and the technical thresholds of the pull rod type rotor structure, the sleeve type rotor structure and the welding type rotor structure are high.
Disclosure of utility model
The utility model aims to provide a power turbine cantilever rotor structure so as to solve the problem of high technical threshold of the power turbine rotor structure. The technical scheme adopted by the utility model is as follows:
A power turbine cantilever rotor structure comprises a turbine shaft, a primary wheel disc, a secondary wheel disc, an inter-disc sealing ring, primary blades and secondary blades;
The turbine shaft is hollow cylinder structure shaft, and one-level rim plate and second grade rim plate cover are established on the turbine shaft, and one-level rim plate includes rim plate major structure, rim plate major structure's inner links to each other with cantilever cylinder structure's one end, and cantilever cylinder structure's the other end links to each other with flange structure's outer end, rim plate major structure, cantilever cylinder structure and flange structure are coaxial, and the flange structure of one-level rim plate and second grade rim plate bilateral symmetry sets up, and the flange structure of one-level rim plate and the flange structure of second grade rim plate are all fixed on the flange of turbine shaft, install the inter-disc sealing ring between one-level rim plate and the second grade rim plate, and the inter-disc sealing ring separates into independent cavity with the space between one-level rim plate and the second grade rim plate, and a plurality of one-level blade circumferences set up in the periphery of one-level rim plate, and a plurality of second grade blade circumferences set up in the periphery of second grade rim plate.
Further, the periphery of one-level rim plate and secondary rim plate all is provided with the tongue-and-groove structure, and the blade root of one-level blade and secondary blade all is equipped with tenon structure, and one-level blade is connected with one-level rim plate tongue-and-groove, and secondary blade is connected with the secondary rim plate tongue-and-groove.
Further, one side that one-level rim plate and second grade rim plate deviate from all is equipped with the seal ring structure, and the seal ring structure and the tertiary quick-witted casket shroud of one-level rim plate rotate sealed cooperation, and the seal ring structure and the quaternary quick-witted casket shroud of second grade rim plate rotate sealed cooperation.
Further, the flange structure of the primary wheel disc and the flange structure of the secondary wheel disc are fixed on the flange of the turbine shaft through the taper bolt group, and flange holes of the flange structure are in interference fit with the taper bolt group.
Further, the opposite sides of the primary wheel disc and the secondary wheel disc are respectively provided with a double-layer ring structure, one end of the inter-disc sealing ring is inserted between the inner layer and the outer layer of the double-layer ring structure of the primary wheel disc, and the other end of the inter-disc sealing ring is inserted between the inner layer and the outer layer of the double-layer ring structure of the secondary wheel disc.
Further, the periphery of the inter-disc sealing ring is provided with a dovetail groove, a sealing sleeve is embedded in the dovetail groove, the periphery of the sealing sleeve is provided with a comb tooth sealing structure, and the comb tooth sealing structure is in rotary sealing fit with the stationary blade partition plate.
Further, the wheel disc main body structure comprises a disc core part, a variable thickness part and a disc top part which are sequentially sleeved and connected from the inner end to the outer end, the section of the variable thickness part is in an isosceles trapezoid shape, and the thickness of the disc core part is larger than that of the disc top part.
Furthermore, stress relief grooves are formed in the upper edges of the opposite side end faces of the primary wheel disc and the secondary wheel disc, corresponding to the periphery of the cantilever cylinder structure.
Compared with the prior art, the utility model has the beneficial effects that:
The bottom of the wheel disc is of a cantilever structure, the whole structure of the rotor of the cantilever structure is more compact, the self weight is light, and the occupied space is small. The two-stage wheel disc and the one-stage wheel disc of the power turbine are symmetrically designed, and the overall stress distribution is more uniform and reasonable. According to the utility model, through carrying out precise structural design on the rotor structure, on the premise of ensuring the structural strength and the safety, the weight is reasonably simplified and reduced, the overall quality is greatly reduced, and the power-weight ratio of the gas turbine is improved. The structure is relatively simple, the manufacturing cost is low, the installation is simple and easy, and the maintenance period is long.
Drawings
FIG. 1 is a schematic diagram of the structure of the present utility model;
Fig. 2 is a schematic structural view of a primary wheel disc.
In the drawings, 1 part of a turbine shaft, 2 parts of a taper bolt group, 3 parts of a first-stage wheel disk, 31 parts of a mortise structure, 32 parts of a seal ring structure, 33 parts of a double-layer ring structure, 34 parts of a disk core, 35 parts of a variable thickness part, 36 parts of a stress relief groove, 37 parts of a cantilever cylinder structure, 38 parts of a flange structure, 4 parts of a second-stage wheel disk, 5 parts of an inter-disk seal ring, 6 parts of a first-stage blade, 7 parts of a second-stage blade and 8 parts of a seal sleeve.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present utility model more apparent, the present utility model is described below by means of specific embodiments shown in the accompanying drawings. It should be understood that the description is only illustrative and is not intended to limit the scope of the utility model. In addition, in the following description, descriptions of well-known structures and techniques are omitted so as not to unnecessarily obscure the present utility model.
The connection mentioned in the utility model is divided into fixed connection and detachable connection, wherein the fixed connection is a conventional fixed connection mode such as folding connection, rivet connection, bonding connection, welding connection and the like, the detachable connection comprises a conventional detachable mode such as bolt connection, buckle connection, pin connection, hinge connection and the like, and when a specific connection mode is not limited, at least one connection mode can be found in the conventional connection mode by default to realize the function, and the person skilled in the art can select the function according to the needs. For example: the fixed connection is welded connection, and the detachable connection is bolted connection.
The present utility model will be described in further detail below with reference to the accompanying drawings, the following examples being illustrative of the present utility model and the present utility model is not limited to the following examples.
Examples: 1-2, a power turbine cantilever rotor structure comprises a turbine shaft 1, a primary wheel disc 3, a secondary wheel disc 4, an inter-disc sealing ring 5, a primary blade 6 and a secondary blade 7;
The turbine shaft 1 is a hollow cylinder structure shaft, the weight can be reduced to the greatest extent while the strength is ensured, the primary wheel disc 3 and the secondary wheel disc 4 are sleeved on the turbine shaft 1, the primary wheel disc 3 is a disc type revolving body structure, the primary wheel disc 3 comprises a wheel disc main body structure, the inner end of the wheel disc main body structure is connected with one end of the cantilever cylinder structure 37, the other end of the cantilever cylinder structure 37 is connected with the outer end of the flange structure 38, the wheel disc main body structure, the cantilever cylinder structure 37 and the flange structure 38 are coaxial, the primary wheel disc 3 and the secondary wheel disc 4 are symmetrically arranged front and back, the flange structure 38 of the primary wheel disc 3 and the flange structure 38 of the secondary wheel disc 4 are both fixed on the flange of the turbine shaft 1, an inter-disc sealing ring 5 is installed between the primary wheel disc 3 and the secondary wheel disc 4, the inter-disc sealing ring 5 separates the space between the primary wheel disc 3 and the secondary wheel disc 4 into independent cavities, a plurality of primary blades 6 are circumferentially arranged on the periphery of the primary wheel disc 3, and a plurality of secondary blades 7 are circumferentially arranged on the periphery of the secondary wheel disc 4.
The bottom of the wheel disc is provided with a cantilever structure 37, and the whole structure of the rotor with the cantilever structure is more compact, light in weight and small in occupied space. The power turbine secondary wheel disc 4 and the primary wheel disc 3 are symmetrically designed, and the overall stress distribution is more uniform and reasonable. According to the utility model, through carrying out precise structural design on the rotor structure, on the premise of ensuring the structural strength and the safety, the weight is reasonably simplified and reduced, the overall quality is greatly reduced, and the power-weight ratio of the gas turbine is improved. The structure is relatively simple, the manufacturing cost is low, the installation is simple and easy, and the maintenance period is long.
The periphery of the first-stage wheel disc 3 and the second-stage wheel disc 4 are provided with tenon structures 31, the blade roots of the first-stage blades 6 and the second-stage blades 7 are provided with tenon structures, the first-stage blades 6 are connected with the tenon grooves of the first-stage wheel disc 3, and the second-stage blades 7 are connected with the tenon grooves of the second-stage wheel disc 4.
One side that the first-level rim plate 3 and second grade rim plate 4 deviate from all is equipped with seal ring structure 32, and seal ring structure 32 and tertiary quick-witted casket shroud ring rotation seal fit of first-level rim plate 3, seal ring structure 32 and the fourth-level quick-witted casket shroud ring rotation seal fit of second grade rim plate 4.
The flange structure 38 of the primary wheel disc 3 and the flange structure 38 of the secondary wheel disc 4 are fixed on the flange of the turbine shaft 1 through the taper bolt group 2, flange holes of the flange structure 38 are in interference fit with the taper bolt group 2, and therefore larger pretightening force can be obtained, safety is higher, and anti-loosening and vibration-resisting capabilities are stronger.
The opposite sides of the primary wheel disc 3 and the secondary wheel disc 4 are respectively provided with a double-layer ring structure 33, one end of the inter-disc sealing ring 5 is inserted between the inner layer and the outer layer of the double-layer ring structure 33 of the primary wheel disc 3, and the other end of the inter-disc sealing ring 5 is inserted between the inner layer and the outer layer of the double-layer ring structure 33 of the secondary wheel disc 4.
The periphery of the inter-disc sealing ring 5 is provided with a dovetail groove, a sealing sleeve 8 is embedded in the dovetail groove, the periphery of the sealing sleeve 8 is provided with a comb tooth sealing structure, and the comb tooth sealing structure is in rotary sealing fit with the stationary blade partition plate.
The wheel disc main body structure comprises a disc core 34, a variable thickness part 35 and a disc top which are sequentially sleeved and connected from the inner end to the outer end, the section of the variable thickness part 35 is in an isosceles trapezoid shape, and the thickness of the disc core 34 is larger than that of the disc top. The disk core 34 serves to increase the strength of the primary disk 3 while a large bevel design, i.e., trapezoidal two waists of the variable thickness portion 35, is made between the disk core 34 and the disk top for weight reduction and smooth transition.
The opposite side end surfaces of the primary wheel disc 3 and the secondary wheel disc 4 are provided with stress relief grooves 36 along the periphery of a corresponding cantilever cylinder structure 37, and the stress relief grooves 36 are used for prolonging the service life and reliability of the wheel disc.
The above embodiments are only illustrative of the present utility model and do not limit the scope thereof, and those skilled in the art may also make modifications to parts thereof without departing from the spirit of the utility model.
Claims (8)
1. A power turbine cantilever rotor structure, characterized in that: the turbine comprises a turbine shaft (1), a primary wheel disc (3), a secondary wheel disc (4), an inter-disc sealing ring (5), primary blades (6) and secondary blades (7);
The turbine shaft (1) is hollow cylinder structure axle, and one-level rim plate (3) and second grade rim plate (4) cover are established on turbine shaft (1), and one-level rim plate (3) are including rim plate major structure, rim plate major structure's inner links to each other with the one end of cantilever cylinder structure (37), and the other end of cantilever cylinder structure (37) links to each other with the outer end of flange structure (38), rim plate major structure, cantilever cylinder structure (37) and flange structure (38) are coaxial, and the symmetry sets up around one-level rim plate (3) and second grade rim plate (4), and flange structure (38) of one-level rim plate (3) and second grade rim plate (4) are all fixed on the flange of turbine shaft (1), install between rim plate (3) and second grade rim plate (4) sealing ring (5), and space between rim plate (3) and second grade rim plate (4) is separated into independent cavity, and a plurality of one-level blades (6) circumference set up in the periphery of one-level rim plate (3), and a plurality of second grade blades (7) circumference sets up in the periphery of second grade rim plate (4).
2. The power turbine cantilever rotor structure according to claim 1, wherein: the periphery of one-level rim plate (3) and second grade rim plate (4) all is provided with tongue-and-groove structure (31), and the blade root of one-level blade (6) and second grade blade (7) all is equipped with tenon structure, and one-level blade (6) are connected with one-level rim plate (3) tongue-and-groove, and second grade blade (7) are connected with second grade rim plate (4) tongue-and-groove.
3. The power turbine cantilever rotor structure according to claim 1, wherein: one side that one-level rim plate (3) and second grade rim plate (4) deviate from all is equipped with seal ring structure (32), and seal ring structure (32) and tertiary quick-witted casket shroud of one-level rim plate (3) rotate sealed cooperation, seal ring structure (32) and the four-level quick-witted casket shroud of second grade rim plate (4) rotate sealed cooperation.
4. The power turbine cantilever rotor structure according to claim 1, wherein: the flange structure (38) of the primary wheel disc (3) and the flange structure (38) of the secondary wheel disc (4) are fixed on the flange of the turbine shaft (1) through the taper bolt group (2), and flange holes of the flange structure (38) are in interference fit with the taper bolt group (2).
5. The power turbine cantilever rotor structure according to claim 1, wherein: one side opposite to the primary wheel disc (3) and the secondary wheel disc (4) is provided with a double-layer ring structure (33), one end of an inter-disc sealing ring (5) is inserted between the inner layer and the outer layer of the double-layer ring structure (33) of the primary wheel disc (3), and the other end of the inter-disc sealing ring (5) is inserted between the inner layer and the outer layer of the double-layer ring structure (33) of the secondary wheel disc (4).
6. The power turbine cantilever rotor structure according to claim 1, wherein: the periphery of the inter-disc sealing ring (5) is provided with a dovetail groove, a sealing sleeve (8) is embedded in the dovetail groove, the periphery of the sealing sleeve (8) is provided with a comb tooth sealing structure, and the comb tooth sealing structure is in rotary sealing fit with the stationary blade partition plate.
7. The power turbine cantilever rotor structure according to claim 1, wherein: the wheel disc main body structure comprises a disc core part (34), a variable thickness part (35) and a disc top part which are sequentially sleeved and connected from the inner end to the outer end, wherein the section of the variable thickness part (35) is in an isosceles trapezoid shape, and the thickness of the disc core part (34) is larger than that of the disc top part.
8. A power turbine cantilever rotor structure according to any one of claims 1-7, wherein: the stress relief grooves (36) are respectively formed in the upper edges of the opposite side end surfaces of the primary wheel disc (3) and the secondary wheel disc (4) and correspond to the periphery of the cantilever cylinder structure (37).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322961631.7U CN220890262U (en) | 2023-11-02 | 2023-11-02 | Cantilever rotor structure of power turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322961631.7U CN220890262U (en) | 2023-11-02 | 2023-11-02 | Cantilever rotor structure of power turbine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220890262U true CN220890262U (en) | 2024-05-03 |
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ID=90874866
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322961631.7U Active CN220890262U (en) | 2023-11-02 | 2023-11-02 | Cantilever rotor structure of power turbine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220890262U (en) |
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2023
- 2023-11-02 CN CN202322961631.7U patent/CN220890262U/en active Active
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