CN115387857A - Blade-wheel disc connecting structure and rotor component - Google Patents
Blade-wheel disc connecting structure and rotor component Download PDFInfo
- Publication number
- CN115387857A CN115387857A CN202210995032.4A CN202210995032A CN115387857A CN 115387857 A CN115387857 A CN 115387857A CN 202210995032 A CN202210995032 A CN 202210995032A CN 115387857 A CN115387857 A CN 115387857A
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- China
- Prior art keywords
- tenon
- blade
- mortise
- pressing device
- elastic pressing
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Classifications
-
- 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
- F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
- F01D5/30—Fixing blades to rotors; Blade roots ; Blade spacers
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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
- F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
- F01D5/30—Fixing blades to rotors; Blade roots ; Blade spacers
- F01D5/3007—Fixing blades to rotors; Blade roots ; Blade spacers of axial insertion type
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
Abstract
The invention relates to the technical field of turboshaft engines, and provides a blade-wheel disc connecting structure and a rotor component, wherein the blade-wheel disc connecting structure comprises: a blade having a tenon provided thereon; the wheel disc is provided with a mortise matched with the tenon, and the tenon is arranged in the mortise; the elastic pressing device is arranged at the bottom of the mortise, one end of the elastic pressing device, which is far away from the bottom of the mortise, is abutted against the tenon, and the elastic pressing device can deform when being pressed so that the tenon can move in the mortise; wherein, the initial state of the elastic pressing device is a compression state. The blade-wheel disc connecting structure provides extra pressure for the blade-wheel disc connecting structure in working and non-working states, and reduces relative sliding between the tenon and the mortise. Meanwhile, the elastic pressing device has certain elasticity, the tenon can slightly move in the mortise, and the tenon can perform self-adaptive centering in the low-speed rotation process of the blade.
Description
Technical Field
The invention relates to the technical field of turboshaft engines, in particular to a blade-wheel disc connecting structure and a rotor component.
Background
At present, a turbine rotor of an aero-engine generally adopts a fir-type disc tenon connecting structure to realize the assembly of a turbine disc and a blade, and the structure has the characteristics of narrow structural design space, complex structural form, obvious stress concentration and the like. Therefore, the design of the fir-tree disc-tenon connecting structure is always difficult in the design of turbine components, however, with the higher performance requirements of aircraft engines, the working environment of the turbine components is more severe, the defects of low service life and low reliability in the traditional fir-tree disc-tenon connecting structure are more obvious, and the design requirements of structural strength cannot be met. Therefore, the pressing device is required to apply pressure to the tenon, so that the blade tenon-wheel disc mortise is in a contact state in working and non-working states, the sliding friction force is increased, and the micro-motion friction is reduced. However, the existing pressing device is usually of a rigid structure, the blade is easy to be eccentric in the assembling process, and once the blade is eccentric, due to the rigid characteristic of the pressing device, the blade is continuously kept in an eccentric state in a working state, so that centrifugal loads are unevenly distributed on two sides of a tenon mortise, stress concentration is caused, and the service life of the tenon-wheel disc mortise structure of the blade is seriously influenced.
Disclosure of Invention
Therefore, the technical problem to be solved by the invention is that the existing compressing device is generally of a rigid structure, the blade is easy to be eccentric in the assembling process, and once the blade is eccentric, the blade is continuously kept in an eccentric state in the working state due to the rigid characteristic of the compressing device, so that centrifugal load is unevenly distributed on two sides of a tenon mortise, stress concentration is caused, the service life of the tenon-wheel disc mortise structure of the blade is seriously influenced, and the blade-wheel disc connecting structure and the rotor component are provided.
In order to solve the technical problems, the technical scheme of the invention is as follows:
a blade-disk connection comprising: a blade having a tenon provided thereon; the wheel disc is provided with a mortise matched with the tenon, and the tenon is arranged in the mortise; the elastic pressing device is arranged at the bottom of the mortise, one end of the elastic pressing device, which is far away from the bottom of the mortise, is abutted against the tenon, and the elastic pressing device can deform when being pressed so as to enable the tenon to move in the mortise; wherein the initial state of the elastic pressing device is a compressed state.
Further, elasticity closing device's body is platelike structure, the body forms one at least after buckling and has an open kink, open two lateral walls are in the body is close to each other or is kept away from each other when taking place deformation.
Further, the bending part comprises one or more of a V shape and an M shape.
Furthermore, the position of the bending part contacting with the tenon is a plane.
Furthermore, the position of the bending part contacting with the groove bottom of the mortise is a plane.
Furthermore, the body is M-shaped and comprises two first openings and one second opening; the body is provided with two first open sides facing the groove bottom of the mortise, and the body is provided with a second open side facing the tenon; the second opening and the area between the tenons form a cold air channel, and the cold air channel is communicated with a cold air inlet on the end face of the bottom of the tenon.
Further, the distance between two opposite groove walls of the mortise is greater than the length of the elastic pressing device.
Furthermore, the side walls of the two first openings, which are close to the edge of the body, are provided with extending parts, and the extending parts extend towards the direction far away from the center of the body and are suitable for increasing the contact area between the body and the bottom of the mortise.
Furthermore, two tenon teeth are arranged on the side wall of the tenon along the depth direction of the mortise, and two grooves are arranged at corresponding positions on the side wall of the mortise; and one tenon tooth is engaged in each groove.
A rotor component comprising a blade-disk connection as described above.
The technical scheme of the invention has the following advantages:
according to the blade-wheel disc connecting structure, the connection between the blade and the wheel disc is realized through the tenon and the mortise, and the elastic pressing device is arranged at the bottom of the mortise, so that extra pressure is provided for the blade-wheel disc connecting structure in a working state and a non-working state, and the relative sliding between the tenon and the mortise is reduced. Meanwhile, the elastic pressing device has certain elasticity, the tenon can slightly move in the mortise, and the tenon can perform self-adaptive centering in the low-speed rotation process of the blade, so that the additional bending moment caused by centrifugal force can be reduced, the stress concentration at the connecting structure of the blade and the wheel disc is reduced, and the service life of the connecting structure of the blade and the wheel disc is prolonged.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic overall view of a blade-disk connection according to an embodiment of the present invention;
FIG. 2 is an enlarged view of a portion of FIG. 1;
FIG. 3 is a schematic view of a disk in a blade-disk connection in an embodiment of the present invention;
FIG. 4 is a schematic view of a blade in a blade-disk connection according to an embodiment of the present invention;
fig. 5 is a schematic view of an elastic pressing device in a blade-disk connection structure according to an embodiment of the present invention.
1. A blade; 2. A wheel disc; 3. A tenon;
4. mortises; 5. An elastic pressing device; 6. Tenon teeth;
7. a groove; 8. A cold air passage; 9. A cold air inlet;
10. a first opening; 11. A second opening; 12. An extension portion.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in a specific case to those of ordinary skill in the art.
In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
FIG. 1 is a schematic overall view of a blade-disk connection according to an embodiment of the present invention; as shown in fig. 1, the present embodiment provides a blade-disk connection structure including: the blade 1 is provided with a tenon 3; the wheel disc 2 is provided with a mortise 4 matched with the tenon 3, the tenon 3 is arranged in the mortise 4, and a micro gap for centering is reserved between the groove wall of the mortise 4 and the side wall of the tenon 3; elastic pressing device 5 sets up at the tank bottom of tongue-and-groove 4, and elastic pressing device 5 keeps away from the one end of tank bottom and offsets with tenon 3, and can take place deformation when elastic pressing device 5 is compressed to make tenon 3 can remove in tongue-and-groove 4, provide probably for tenon 3 self-adaptation centering under the low rotational speed state. Wherein, elastic pressing device 5's initial condition is compression state, and elastic pressing device 5 makes tenon 3 push up, no matter be under work and non-operating condition, tenon 3 all can support tightly with the cell wall of tongue-and-groove 4 to increase the pressure of both contact departments, increase relative frictional force reduces the relative slip between tenon 3 and the tongue-and-groove 4.
The blade-wheel disc connecting structure provided by the embodiment realizes the connection of the blade 1 and the wheel disc 2 through the tenon 3 and the mortise 4, and the elastic pressing device 5 is arranged at the bottom of the mortise 4, so that extra pressure is provided for the blade-wheel disc connecting structure in working and non-working states, and the relative sliding between the tenon 3 and the mortise 4 is reduced. Meanwhile, the elastic pressing device 5 has certain elasticity, the tenon 3 can slightly move in the mortise 4, and the tenon 3 can perform self-adaptive centering in the low-speed rotation process of the blade 1, so that the additional bending moment caused by centrifugal force can be reduced, the stress concentration at the blade-wheel disc connecting structure is reduced, and the service life of the blade-wheel disc connecting structure is prolonged.
Wherein, elasticity closing device 5's body is platelike structure, and the body forms at least one after buckling and has open kink, and is preferred, and the kink includes one or more in V type and the M type, and two open lateral walls of kink are close to each other or are kept away from each other when the body takes place deformation. The distance between two opposite groove walls of the mortise 4 is greater than the length of the elastic pressing device 5, and after the elastic pressing device 5 is compressed by force, the height of the elastic pressing device 5 is reduced, and the length of the elastic pressing device is increased, so that the elastic pressing device 5 cannot be limited by the groove walls of the mortise 4 when being extended. Moreover, compared with a spiral spring structure, the bent part of the structure has stronger support, and can also have small-range deformation to meet the centering of the tenon 3, so that the use effect is better; moreover, the tenon 3 is in plane contact with the elastic pressing device 5, and the mortise 4 is in plane contact with the elastic pressing device 5, so that the elastic pressing device 5 is more stable to mount and more balanced in stress.
FIG. 2 is an enlarged view of a portion of FIG. 1; FIG. 3 is a schematic view of a disk in a blade-disk connection in an embodiment of the present invention; FIG. 4 is a schematic view of a blade in a blade-disk connection in an embodiment of the present invention; FIG. 5 is a schematic view of a resilient hold-down device in a blade-disk connection in an embodiment of the present invention; as shown in fig. 2, 3, 4 and 5, for example, the body is M-shaped, and includes two first openings 10 and one second opening 11; the side of the body with two first openings 10 faces the bottom of the mortise 4, and the side of the body with one second opening 11 faces the tenon 3; the area between the second opening 11 and the tenon 3 forms a cold air channel 8, and the cold air channel 8 is communicated with a cold air inlet 9 on the bottom end surface of the tenon 3, so that the cooling air in the cold air channel 8 can enter the interior of the tenon 3 through the cold air inlet 9.
Wherein, the side walls of the two first openings 10 close to the edge of the body are provided with extending parts 12, and the extending parts 12 extend towards the direction far away from the center of the body and are suitable for increasing the contact area between the body and the bottom of the mortise 4. So set up for the focus that is the body of M type is more steady, and the clamp that can be more stable is established between tenon 3 and tongue-and-groove 4.
Wherein, the position of the bending part contacting with the tenon 3 can be a smooth plane. So set up, can increase the area of contact of elasticity closing device 5 and tenon 3, when improving the supporting effect, can also reduce the contact stress between the bottom of tenon 3 and the kink.
Wherein, the position where the bending part contacts with the bottom of the mortise 4 can also be a smooth plane. So set up, can increase the area of contact of elasticity closing device 5 and the tank bottom of tongue-and-groove 4, when improving the supporting effect, can also reduce the contact stress between the tank bottom of tongue-and-groove 4 and the kink.
For example, two tenon teeth 6 may be disposed on the side wall of the tenon 3 along the depth direction of the mortise 4, and two grooves 7 are disposed at corresponding positions on the side wall of the mortise 4; one cog 6 is engaged in each groove 7. The number of the tenon teeth 6 on the mortise 4 can also be designed according to the requirement, and the number is not limited to two, and can also be one, three or more than three. Similarly, the number of the grooves 7 on the mortise 4 is not particularly limited, and the grooves 7 correspond to the tenons 6 one by one.
In another embodiment, a rotor component is provided, including the blade-disk connection structure described above. For example, the rotor component may be adapted for use in a turboshaft engine.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.
Claims (10)
1. A blade-disk connection comprising:
the blade is provided with a tenon;
the wheel disc is provided with a mortise matched with the tenon, and the tenon is arranged in the mortise;
the elastic pressing device is arranged at the bottom of the mortise, one end of the elastic pressing device, which is far away from the bottom of the mortise, is abutted against the tenon, and the elastic pressing device can deform when being pressed so as to enable the tenon to move in the mortise;
wherein the initial state of the elastic pressing device is a compressed state.
2. The blade-disk connection of claim 1,
the elastic pressing device is characterized in that the body is of a plate-shaped structure, at least one bent part with an opening is formed after the body is bent, and the two open side walls are close to or far away from each other when the body deforms.
3. The blade-disk connection of claim 2,
the bending part comprises one or more of a V shape and an M shape.
4. The blade-disk connection of claim 2,
the position of the bending part contacting the tenon is a plane.
5. The blade-disk connection structure of claim 2,
the position of the bending part contacting with the groove bottom of the mortise is a plane.
6. The blade-disk connection of claim 2,
the body is M-shaped and comprises two first openings and one second opening;
the body is provided with two first open sides facing the groove bottom of the mortise, and the body is provided with a second open side facing the tenon;
the second opening and the area between the tenons form a cold air channel, and the cold air channel is communicated with a cold air inlet on the end face of the bottom of the tenon.
7. The blade-disk connection structure of claim 6,
the distance between two opposite groove walls of the mortise is greater than the length of the elastic pressing device.
8. The blade-disk connection of claim 6,
the side walls of the two first openings, which are close to the edges of the body, are provided with extending parts, and the extending parts extend towards the direction far away from the center of the body and are suitable for increasing the contact area between the body and the bottom of the mortise.
9. The blade-disk connection according to any one of claims 1 to 8,
two tenon teeth are arranged on the side wall of the tenon along the depth direction of the mortise, and two grooves are arranged at corresponding positions on the side wall of the mortise;
one of the tenon teeth is engaged in each of the grooves.
10. A rotor component comprising a blade-disk connection according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210995032.4A CN115387857A (en) | 2022-08-18 | 2022-08-18 | Blade-wheel disc connecting structure and rotor component |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210995032.4A CN115387857A (en) | 2022-08-18 | 2022-08-18 | Blade-wheel disc connecting structure and rotor component |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115387857A true CN115387857A (en) | 2022-11-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210995032.4A Pending CN115387857A (en) | 2022-08-18 | 2022-08-18 | Blade-wheel disc connecting structure and rotor component |
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| CN (1) | CN115387857A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117818930A (en) * | 2024-03-04 | 2024-04-05 | 中国人民解放军军事科学院国防科技创新研究院 | Propeller with adjustable heterogeneous composite material structure and unmanned aerial vehicle |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5584659A (en) * | 1994-08-29 | 1996-12-17 | Mtu Motoren- Und Turbinen-Union Muenchen Gmbh | Device for fixing turbine blades and for eliminating rotor balance errors in axially flow-through compressors or turbines of gas turbine drives |
| US6575704B1 (en) * | 1999-06-07 | 2003-06-10 | Siemens Aktiengesellschaft | Turbomachine and sealing element for a rotor thereof |
| US20050207892A1 (en) * | 2004-02-25 | 2005-09-22 | Mitsubishi Heavy Industries, Ltd. | Rotating blade body and rotary machine using rotating blade body |
| DE102014206758A1 (en) * | 2014-04-08 | 2015-10-08 | Siemens Aktiengesellschaft | Gas turbine blade or compressor blade with anti-fretting coating in the blade root area and rotor |
| CN111472845A (en) * | 2020-05-27 | 2020-07-31 | 上海尚实能源科技有限公司 | Turbine disc and blade locking mechanism for turboprop engine |
-
2022
- 2022-08-18 CN CN202210995032.4A patent/CN115387857A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5584659A (en) * | 1994-08-29 | 1996-12-17 | Mtu Motoren- Und Turbinen-Union Muenchen Gmbh | Device for fixing turbine blades and for eliminating rotor balance errors in axially flow-through compressors or turbines of gas turbine drives |
| US6575704B1 (en) * | 1999-06-07 | 2003-06-10 | Siemens Aktiengesellschaft | Turbomachine and sealing element for a rotor thereof |
| US20050207892A1 (en) * | 2004-02-25 | 2005-09-22 | Mitsubishi Heavy Industries, Ltd. | Rotating blade body and rotary machine using rotating blade body |
| DE102014206758A1 (en) * | 2014-04-08 | 2015-10-08 | Siemens Aktiengesellschaft | Gas turbine blade or compressor blade with anti-fretting coating in the blade root area and rotor |
| CN111472845A (en) * | 2020-05-27 | 2020-07-31 | 上海尚实能源科技有限公司 | Turbine disc and blade locking mechanism for turboprop engine |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117818930A (en) * | 2024-03-04 | 2024-04-05 | 中国人民解放军军事科学院国防科技创新研究院 | Propeller with adjustable heterogeneous composite material structure and unmanned aerial vehicle |
| CN117818930B (en) * | 2024-03-04 | 2024-05-10 | 中国人民解放军军事科学院国防科技创新研究院 | Propeller with adjustable heterogeneous composite material structure and unmanned aerial vehicle |
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