CN117703531A - High-speed ceramic turbine rotor and manufacturing method thereof - Google Patents
High-speed ceramic turbine rotor and manufacturing method thereof Download PDFInfo
- Publication number
- CN117703531A CN117703531A CN202311647561.6A CN202311647561A CN117703531A CN 117703531 A CN117703531 A CN 117703531A CN 202311647561 A CN202311647561 A CN 202311647561A CN 117703531 A CN117703531 A CN 117703531A
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- rotating shaft
- alloy steel
- steel rotating
- centripetal
- ceramic turbine
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- 239000000919 ceramic Substances 0.000 title claims abstract description 88
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 8
- 229910000851 Alloy steel Inorganic materials 0.000 claims abstract description 103
- 238000010248 power generation Methods 0.000 claims abstract description 15
- 239000000463 material Substances 0.000 claims description 6
- 230000000712 assembly Effects 0.000 claims description 3
- 238000000429 assembly Methods 0.000 claims description 3
- 238000003754 machining Methods 0.000 claims description 3
- 229910052581 Si3N4 Inorganic materials 0.000 claims 1
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 claims 1
- 239000000306 component Substances 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- 238000003466 welding Methods 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000010894 electron beam technology Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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
- F01D5/3053—Fixing blades to rotors; Blade roots ; Blade spacers by means of pins
-
- 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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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Supercharger (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
Abstract
The invention discloses a high-speed ceramic turbine rotor and a manufacturing method thereof. Firstly, determining the size parameters of a high turbine rotor and a centripetal ceramic turbine impeller, an alloy steel rotating shaft, a screw and a locking buckle of components of the high turbine rotor according to the structural parameters of a turbocharging power generation system, secondly, processing turbine rotor components, then, assembling the turbine impeller and the alloy steel rotating shaft, assembling the screw and the centripetal ceramic turbine impeller and the alloy steel rotating shaft, and finally, assembling the locking buckle, the screw and the alloy steel rotating shaft to form a complete turbine rotor. The turbine rotor structure can realize reliable connection of the turbine impeller and the alloy steel rotating shaft, can reduce the working stress of the turbine rotor, effectively ensures the working reliability and service life of the turbine rotor, and has good manufacturability.
Description
Technical Field
The invention belongs to the field of structural design of turbocharging power generation systems, and particularly relates to a high-speed ceramic turbine rotor and a manufacturing method thereof.
Background
The turbocharging power generation system can realize conversion from heat energy to mechanical energy by means of the gas working medium through thermodynamic cycle processes such as heat absorption, expansion work, heat release, compression and the like, and further converts the mechanical energy into electric energy by utilizing the motor. The turbocharging power generation system mainly comprises a turbine, a compressor, a motor and other parts in structure.
The turbine rotor is used as a core component of the turbocharging power generation system, is one of the most severely loaded components in the system, and plays a decisive role in the stable operation, the working reliability and the service life of the system. In the running process of the turbocharging power generation system, the turbine rotor is in a high-speed rotating state under the action of high-temperature gas working medium, the rotating speed of the turbine rotor can reach tens of thousands of revolutions per minute, and the rotating speed of some rotors can even reach hundreds of thousands of revolutions per minute. Once the turbine rotor structure fails, the turbocharging power generation system cannot work normally, conversion from heat energy to mechanical energy cannot be realized, and the system structure is damaged. Therefore, reasonable design of the structure of the turbine rotor is critical to ensure structural reliability of the turbine power generation system.
The turbine rotor consists of a turbine impeller and a rotating shaft structure, and is formed by connecting the turbine impeller and the alloy steel rotating shaft together so as to meet the working temperature requirements of different parts of the turbine rotor, wherein the turbine impeller is made of high-temperature resistant materials, and the rotating shaft is made of high-strength alloy steel materials. In order to ensure the reliability and the service life of the turbine rotor in high-speed rotation operation under the action of high-temperature gas working medium, the turbine rotor is required to have lower working stress and is also required to be free from loosening or breakage between the turbine impeller and the alloy steel rotating shaft. For the turbine impeller manufactured by adopting the high-temperature alloy, the reliable connection between the turbine impeller and the alloy steel rotating shaft can be realized through welding processes such as friction welding, electron beam and the like, and for the turbine impeller manufactured by materials such as ceramics and the like, the reliable connection between the turbine impeller and the alloy steel rotating shaft is difficult to realize by adopting the welding processes such as friction welding, electron beam and the like because the materials and the alloy steel have large difference in material characteristics.
Aiming at the requirements of the performance and the working reliability of a high-speed turbine rotor of a turbocharging power generation system, the reliable connection between a ceramic turbine impeller and an alloy steel rotating shaft is realized by reasonably designing the structure and the process of the turbine rotor, so that the performance of the turbocharging power generation system is ensured, and meanwhile, the high reliability and the long service life are realized.
Disclosure of Invention
In view of the above, the present invention provides a high-speed ceramic turbine rotor and a method for manufacturing the same, which are directed to the connection requirement of the high-speed turbine rotor in a turbo-charged power generation system. The turbine rotor structure comprises a centripetal ceramic turbine impeller, an alloy steel rotating shaft, screws and locking buckles. Firstly, determining the size parameters of a high turbine rotor and a centripetal ceramic turbine impeller, an alloy steel rotating shaft, a screw and a locking buckle of components of the high turbine rotor according to the structural parameters of a turbocharging power generation system, secondly, processing turbine rotor components, then, assembling the turbine impeller and the alloy steel rotating shaft, assembling the screw and the centripetal ceramic turbine impeller and the alloy steel rotating shaft, and finally, assembling the locking buckle, the screw and the alloy steel rotating shaft to form a complete turbine rotor.
A high-speed ceramic turbine rotor structure comprises a centripetal ceramic turbine impeller, an alloy steel rotating shaft, a screw and a locking buckle.
The hub back of the centripetal ceramic turbine impeller is provided with a circular boss, the center part of the hub back circular boss of the centripetal ceramic turbine impeller is provided with a positioning blind hole, and the hub back circular boss of the centripetal ceramic turbine impeller is uniformly provided with threaded blind holes along the circumferential direction of the positioning blind hole;
an annular boss is arranged at one end of the alloy steel rotating shaft, an annular surface matched with the circular boss at the back of the hub of the centripetal ceramic turbine impeller is arranged at one side of the annular boss of the alloy steel rotating shaft, counter bores are uniformly distributed at the other side of the annular boss of the alloy steel rotating shaft, a through hole is formed in the bottom of the counter bore of the alloy steel rotating shaft, and a cylindrical boss matched with the positioning blind hole of the centripetal ceramic turbine impeller is arranged on the annular surface of the alloy steel rotating shaft;
the screw is an inner hexagon screw, an inner hexagon counter bore is formed in a cylinder at the head of the screw, the screw is assembled with a threaded blind hole of the centripetal ceramic turbine impeller and a through hole of the alloy steel rotating shaft, and the head of the screw is positioned in the counter bore of the alloy steel rotating shaft;
one side of the locking buckle is provided with an outer hexagonal boss assembled with an inner hexagonal counter bore of the head part of the screw, the other side of the locking buckle is provided with a cylinder assembled with a counter bore of the alloy steel rotating shaft, and the cylinder of the locking buckle is welded with the counter bore of the alloy steel rotating shaft to realize locking of the screw same-centripetal ceramic turbine impeller and the alloy steel rotating shaft assembly structure.
The manufacturing method of the high-speed ceramic turbine rotor structure comprises the following steps:
a. determining structural dimensional parameters of the high-speed ceramic turbine rotor and its components: according to structural parameters of the turbocharging power generation system, determining dimensional parameters of a turbine rotor and components thereof, namely a centripetal ceramic turbine impeller, an alloy steel rotating shaft, screws and locking buckles;
b. machining of high-speed ceramic turbine rotor assemblies: c, processing the centripetal ceramic turbine impeller, the alloy steel rotating shaft, the screw and the locking buckle according to the structural size parameters of the high-speed ceramic turbine rotor assembly determined in the step a;
c. assembling a centripetal ceramic turbine impeller and an alloy steel rotating shaft: the cylindrical boss of the alloy steel rotating shaft is arranged in the positioning blind hole of the centripetal ceramic turbine impeller, and the annular surface of the alloy steel rotating shaft is tightly attached to the circular boss at the back of the hub of the centripetal ceramic turbine impeller;
d. assembling the screw and the centripetal ceramic turbine impeller and the alloy steel rotating shaft: the screw is arranged in a through hole of the alloy steel rotating shaft and a threaded blind hole of the centripetal ceramic turbine impeller and screwed, so that the head of the screw is positioned in a counter bore of the alloy steel rotating shaft;
e. assembling the locking buckle, the screw and the alloy steel rotating shaft: the outer hexagonal boss of the locking buckle is pressed into the hexagonal counter bore in the head part of the screw, the cylinder of the locking buckle is filled into the counter bore of the alloy steel rotating shaft, and the cylinder of the locking buckle is welded with the counter bore of the alloy steel rotating shaft, so that the screw and the assembly structure of the centripetal ceramic turbine impeller and the alloy steel rotating shaft are locked, and a complete turbine rotor is formed.
The beneficial effects are that:
1. the center part of the round boss at the back of the hub of the centripetal ceramic turbine impeller is provided with the positioning blind hole, so that the working stress of the turbine impeller can be obviously reduced and the reliability of a turbine rotor can be improved while the assembly and the positioning of the turbine impeller and the alloy steel rotating shaft are realized. The circular boss in the back of the hub of the centripetal ceramic turbine impeller is uniformly provided with threaded blind holes along the circumferential direction of the positioning blind holes, so that the connection between the turbine impeller and the alloy steel rotating shaft is realized, the reliable transmission of the connection strength and torque of the turbine rotor is ensured, and the stress of the center part of the turbine hub can be remarkably reduced because the threaded blind holes are far away from the center part of the turbine impeller.
2. According to the invention, the turbine impeller and the alloy steel rotating shaft are assembled through the assembly of the positioning blind hole and the cylindrical boss and the screw compression assembly of the screw, so that the positioning precision between the turbine impeller and the alloy steel rotating shaft is ensured, and the connection strength between the turbine impeller and the alloy steel rotating shaft is also ensured.
3. According to the invention, the outer hexagonal boss of the locking buckle is pressed into the hexagonal counter bore in the head of the screw, and meanwhile, the cylinder is filled into the counter bore of the alloy steel rotating shaft, and the locking buckle cylinder is welded with the counter bore of the alloy steel rotating shaft, so that loosening of the screw can be effectively prevented, the connection strength of the turbine impeller and the alloy steel rotating shaft can be fully ensured, the reliability and the service life of the turbine rotor can be improved, and the disturbance of the counter bore of the alloy steel rotating shaft to surrounding air flow during the working of the turbine rotor can be reduced. The turbine rotor structure reduces the working stress of the turbine rotor while realizing reliable connection of the turbine impeller and the alloy steel rotating shaft, effectively ensures the working life of the turbine rotor and has good manufacturability.
Drawings
FIG. 1 is a schematic view of a high-speed ceramic turbine rotor construction;
FIG. 2 is a schematic diagram of a centripetal ceramic turbine wheel;
FIG. 3 is a schematic view of a steel alloy spindle structure;
fig. 4 is a schematic view of the structure of the locking buckle.
1-centripetal ceramic turbine impeller, 2-alloy steel rotating shaft, 3-screw, 4-locking buckle, round boss of 5-centripetal ceramic turbine impeller, positioning blind hole of 6-centripetal ceramic turbine impeller, threaded blind hole of 7-centripetal ceramic turbine impeller, annular boss of 8-alloy steel rotating shaft, ring surface of 9-alloy steel rotating shaft, counter bore of 10-alloy steel rotating shaft, through hole of 11-alloy steel rotating shaft, cylindrical boss of 12-alloy steel rotating shaft, outer hexagonal boss of 13-locking buckle, and cylinder of 14-locking buckle.
Detailed Description
The invention will now be described in detail by way of example with reference to the accompanying drawings.
As shown in figure 1, the invention provides a high-speed ceramic turbine rotor structure, which comprises a centripetal ceramic turbine impeller 1, an alloy steel rotating shaft 2, a screw 3 and a locking buckle 4.
As shown in fig. 2, a circular boss 5 is arranged at the back of the hub of the centripetal ceramic turbine impeller 1, a positioning blind hole 6 is arranged at the center of the circular boss 5 at the back of the hub of the centripetal ceramic turbine impeller 1, and threaded blind holes 7 are uniformly distributed on the circular boss 5 at the back of the hub of the centripetal ceramic turbine impeller 1 along the circumferential direction of the positioning blind hole 6;
as shown in fig. 3, one end of the alloy steel rotating shaft 2 is provided with an annular boss 8, one side of the annular boss 8 of the alloy steel rotating shaft 2 is provided with an annular surface 9 matched with the circular boss 5 at the back of the hub of the centripetal ceramic turbine impeller 1, the other side of the annular boss 8 of the alloy steel rotating shaft 2 is uniformly provided with counter bores 10, the bottom of the counter bore 10 of the alloy steel rotating shaft 2 is provided with a through hole 11, and the annular surface 9 of the alloy steel rotating shaft 2 is provided with a cylindrical boss 12 matched with the positioning blind hole 6 of the centripetal ceramic turbine impeller 1;
the screw 3 is an inner hexagon screw, an inner hexagon counter bore is formed in a cylinder at the head of the screw 3, the screw 3 is assembled with a threaded blind hole 7 of the centripetal ceramic turbine impeller 1 and a through hole 11 of the alloy steel rotating shaft 2, and the head of the screw 3 is positioned in a counter bore 10 of the alloy steel rotating shaft 2;
as shown in fig. 4, one side of the locking buckle 4 is provided with an outer hexagonal boss 13 assembled with a hexagonal counter bore in the head of the screw 3, the other side of the locking buckle 4 is provided with a cylinder 14 assembled with a counter bore 10 of the alloy steel rotating shaft 2, and the cylinder 14 of the locking buckle 4 is welded with the counter bore 10 of the alloy steel rotating shaft 2, so that the locking of the screw 3 and the assembling structure of the centripetal ceramic turbine impeller 1 and the alloy steel rotating shaft 2 is realized.
The manufacturing method of the high-speed ceramic turbine rotor structure comprises the following steps:
a. determining structural dimensional parameters of the high-speed ceramic turbine rotor and its components: according to structural parameters of the turbocharging power generation system, determining dimensional parameters of a turbine rotor and components thereof, namely a centripetal ceramic turbine impeller 1, an alloy steel rotating shaft 2, a screw 3 and a locking buckle 4;
b. machining of high-speed ceramic turbine rotor assemblies: c, processing the centripetal ceramic turbine impeller 1, the alloy steel rotating shaft 2, the screw 3 and the locking buckle 4 according to the structural size parameters of the high-speed ceramic turbine rotor assembly determined in the step a;
c. assembling the centripetal ceramic turbine impeller 1 and the alloy steel rotating shaft 2: the cylindrical boss 12 of the alloy steel rotating shaft 2 is arranged in the positioning blind hole 6 of the centripetal ceramic turbine impeller 1, and the annular surface 9 of the alloy steel rotating shaft 2 is tightly attached to the round boss 5 at the back of the hub of the centripetal ceramic turbine impeller 1;
d. assembling the screw 3 with the centripetal ceramic turbine impeller 1 and the alloy steel rotating shaft 2: the screw 3 is arranged in the through hole 11 of the alloy steel rotating shaft 2 and the threaded blind hole 7 of the centripetal ceramic turbine impeller 1, and is screwed, so that the head of the screw 3 is positioned in the counter bore 10 of the alloy steel rotating shaft 2;
e. assembling the locking buckle 4, the screw 3 and the alloy steel rotating shaft 2: the outer hexagonal boss 13 of the locking buckle 4 is pressed into the hexagonal counter bore in the head of the screw 3, the cylinder 14 of the locking buckle 4 is filled into the counter bore 10 of the alloy steel rotating shaft 2, and the cylinder 14 of the locking buckle 4 is welded with the counter bore 10 of the alloy steel rotating shaft 2, so that the screw 3 is locked with the assembling structure of the centripetal ceramic turbine impeller 1 and the alloy steel rotating shaft 2, and a complete turbine rotor is formed.
In summary, the above embodiments are only preferred embodiments of the present invention, and are not intended to limit the scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. The high-speed ceramic turbine rotor is characterized by comprising a centripetal ceramic turbine impeller (1), an alloy steel rotating shaft (2), a screw (3) and a locking buckle (4);
the hub back of the centripetal ceramic turbine impeller (1) is provided with a circular boss (5), the center part of the hub back circular boss (5) of the centripetal ceramic turbine impeller (1) is provided with a positioning blind hole (6), and threaded blind holes (7) are uniformly distributed on the hub back circular boss (5) of the centripetal ceramic turbine impeller (1) along the circumferential direction of the positioning blind hole (6);
one end of the alloy steel rotating shaft (2) is provided with an annular boss (8), one side of the annular boss (8) of the alloy steel rotating shaft (2) is provided with an annular surface (9) matched with the hub back circular boss (5) of the centripetal ceramic turbine impeller (1), counter bores (10) are uniformly distributed on the other side of the annular boss (8) of the alloy steel rotating shaft (2), the bottom of the counter bore (10) of the alloy steel rotating shaft (2) is provided with a through hole (11), and the annular surface (9) of the alloy steel rotating shaft (2) is provided with a cylindrical boss (12) matched with the positioning blind hole (6) of the centripetal ceramic turbine impeller (1);
the locking buckle is characterized in that one side of the locking buckle (4) is provided with an outer hexagonal boss (13) assembled with an inner hexagonal counter bore of the head of the screw (3), the other side of the locking buckle (4) is provided with a cylinder (14) assembled with a counter bore (10) of the alloy steel rotating shaft (2), and the cylinder (14) of the locking buckle (4) is welded with the counter bore (10) of the alloy steel rotating shaft (2) to realize locking of the screw (3) and the assembling structure of the centripetal ceramic turbine impeller (1) and the alloy steel rotating shaft (2).
2. The high-speed ceramic turbine rotor as recited in claim 1, wherein: the screw (3) is an inner hexagon screw, an inner hexagon counter bore is formed in a head cylinder of the screw (3), the screw (3) is assembled with a threaded blind hole (7) of the centripetal ceramic turbine impeller (1) and a through hole (11) of the alloy steel rotating shaft (2), and the head of the screw (3) is located in a counter bore (10) of the alloy steel rotating shaft (2).
3. The high-speed ceramic turbine rotor as recited in claim 1, wherein: the centripetal ceramic turbine impeller (1) is made of silicon nitride materials.
4. The high-speed ceramic turbine rotor of claim 1, wherein the method of manufacturing the high-speed ceramic turbine rotor comprises the steps of:
a. determining structural dimensional parameters of the high-speed ceramic turbine rotor and its components: according to structural parameters of the turbocharging power generation system, determining dimensional parameters of a turbine rotor and components thereof, namely a centripetal ceramic turbine impeller (1), an alloy steel rotating shaft (2), a screw (3) and a locking buckle (4);
b. machining of high-speed ceramic turbine rotor assemblies: c, processing the centripetal ceramic turbine impeller (1), the alloy steel rotating shaft (2), the screw (3) and the locking buckle (4) according to the structural size parameters of the high-speed ceramic turbine rotor assembly determined in the step a;
c. assembling a centripetal ceramic turbine impeller (1) and an alloy steel rotating shaft (2): a cylindrical boss (12) of the alloy steel rotating shaft (2) is arranged in a positioning blind hole (6) of the centripetal ceramic turbine impeller (1), and an annular surface (9) of the alloy steel rotating shaft (2) is tightly attached to a round boss (5) at the back of a hub of the centripetal ceramic turbine impeller (1);
d. assembling the screw (3) with the centripetal ceramic turbine impeller (1) and the alloy steel rotating shaft (2): the screw (3) is arranged in a through hole (11) of the alloy steel rotating shaft (2) and a threaded blind hole (7) of the centripetal ceramic turbine impeller (1) and is screwed, so that the head of the screw (3) is positioned in a counter bore (10) of the alloy steel rotating shaft (2);
e. and the locking buckle (4) is assembled with the screw (3) and the alloy steel rotating shaft (2).
5. The high-speed ceramic turbine rotor as claimed in claim 3 or 4, characterized in that: in the step e, an outer hexagonal boss (13) of the locking buckle (4) is pressed into a hexagonal counter bore in the head of the screw (3), meanwhile, a cylinder (14) of the locking buckle (4) is arranged in a counter bore (10) of the alloy steel rotating shaft (2), and the cylinder (14) of the locking buckle (4) is welded with the counter bore (10) of the alloy steel rotating shaft (2), so that the screw (3) and the assembling structure of the centripetal ceramic turbine impeller (1) and the alloy steel rotating shaft (2) are locked, and a complete turbine rotor is formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311647561.6A CN117703531A (en) | 2023-12-04 | 2023-12-04 | High-speed ceramic turbine rotor and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311647561.6A CN117703531A (en) | 2023-12-04 | 2023-12-04 | High-speed ceramic turbine rotor and manufacturing method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117703531A true CN117703531A (en) | 2024-03-15 |
Family
ID=90158070
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311647561.6A Pending CN117703531A (en) | 2023-12-04 | 2023-12-04 | High-speed ceramic turbine rotor and manufacturing method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117703531A (en) |
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2023
- 2023-12-04 CN CN202311647561.6A patent/CN117703531A/en active Pending
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