CN110344890B - High-reliability turbine power generation system rotor structure and manufacturing process - Google Patents
High-reliability turbine power generation system rotor structure and manufacturing process Download PDFInfo
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- CN110344890B CN110344890B CN201910647943.6A CN201910647943A CN110344890B CN 110344890 B CN110344890 B CN 110344890B CN 201910647943 A CN201910647943 A CN 201910647943A CN 110344890 B CN110344890 B CN 110344890B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P21/00—Machines for assembling a multiplicity of different parts to compose units, with or without preceding or subsequent working of such parts, e.g. with programme control
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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
- F01D15/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
- F01D15/08—Adaptations for driving, or combinations with, pumps
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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
- F01D15/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
- F01D15/10—Adaptations for driving, or combinations with, electric generators
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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
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
- F01D25/005—Selecting particular materials
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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
- F01D5/02—Blade-carrying members, e.g. rotors
- F01D5/026—Shaft to shaft connections
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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
- F01D5/02—Blade-carrying members, e.g. rotors
- F01D5/04—Blade-carrying members, e.g. rotors for radial-flow machines or engines
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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
- F01D5/02—Blade-carrying members, e.g. rotors
- F01D5/06—Rotors for more than one axial stage, e.g. of drum or multiple disc type; Details thereof, e.g. shafts, shaft connections
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D25/00—Pumping installations or systems
- F04D25/02—Units comprising pumps and their driving means
- F04D25/04—Units comprising pumps and their driving means the pump being fluid-driven
- F04D25/045—Units comprising pumps and their driving means the pump being fluid-driven the pump wheel carrying the fluid driving means, e.g. turbine blades
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/05—Shafts or bearings, or assemblies thereof, specially adapted for elastic fluid pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/26—Rotors specially for elastic fluids
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/26—Rotors specially for elastic fluids
- F04D29/266—Rotors specially for elastic fluids mounting compressor rotors on shafts
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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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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
- Supercharger (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention relates to a high-reliability turbine power generation system rotor structure and a manufacturing process. The rotor consists of a locking nut, a compressor impeller, a composite shaft sleeve, a motor shaft, a radial shaft sleeve and a turbine rotating shaft. According to the size parameters of a turbine, a compressor and a motor, by reasonably determining the structural parameters and the assembly process parameters of rotor component parts, on the basis of finishing the processing of the rotor component parts, firstly assembling the motor shaft parts, secondly assembling the radial shaft sleeve and the turbine rotating shaft and the motor shaft and the turbine rotating shaft, then assembling the composite shaft sleeve and the motor shaft and the turbine rotating shaft, and finally assembling the compressor impeller, the composite shaft sleeve, the turbine rotating shaft and the locking nut to form a complete rotor structure. The rotor structure can ensure the connection strength and the integral rigidity of the rotor component of the turbine power generation system, reduce the abrasion between the rotor and the bearing, and improve the structural reliability and the service life of the rotor of the turbine power generation system.
Description
Technical Field
The invention belongs to the field of structural design and manufacturing of a closed cycle turbine power generation system, and particularly relates to a high-reliability turbine power generation system rotor structure and a manufacturing process.
Background
As a novel efficient thermodynamic conversion form, the closed-cycle turbine power generation system can realize conversion from heat energy to electric energy through thermodynamic processes such as heat absorption, expansion work, heat release, compression and the like in a closed environment by means of a certain gas working medium. A typical closed cycle turbine power generation system mainly comprises a turbine, a gas compressor, a starter generator, a heat regenerator, a pipeline and other parts.
The rotor of the closed-cycle turbine power generation system mainly comprises a turbine, a compressor impeller rotating shaft and a motor rotating shaft, is one of the most core components in the closed-cycle turbine power generation system, and plays a decisive role in stable operation, thermoelectric conversion efficiency, structural reliability and service life of the system. When the closed-cycle turbine power generation system works, the rotor is in a high-speed rotation state, the rotation speed of the rotor can reach tens of thousands of revolutions per minute, and the rotation speed of some closed-cycle turbine power generation systems can even reach more than one hundred thousand revolutions per minute. Once a rotor structure rotating at a high speed fails, not only can the closed cycle turbine power generation system fail to work normally, but also damage to the related structure of the system can be caused. Therefore, the reasonable design of the composition and the assembly structure of the rotor is very important for ensuring the reliability of the closed turbine power generation system.
The rotor of the existing closed cycle turbine power generation system mainly comprises a turbine rotor, a main shaft, a compressor impeller, a motor shaft, a coupling and other parts, and the connection between the turbine and the compressor impeller rotor and the motor shaft is realized through interference connection by means of the coupling. The assembly process of the rotor specifically comprises the following steps: the main shaft is respectively connected with a turbine rotor wheel back boss and a compressor impeller wheel back boss in an interference manner through inner holes at two ends of the main shaft to form a power rotating shaft, and then the power rotating shaft and the motor shaft are connected together through the interference assembly between the inner holes at two ends of the coupler and a hub at one end of the motor shaft and a hub at the inlet end of the compressor impeller to form a complete rotor. The rotor of the closed-cycle turbine power generation system adopts an interference connection structure, although the coaxiality of all components of the rotor can be ensured to a certain extent, the connection strength of the rotor depends on the assembly size and tolerance of all components, and high requirements are provided for the machining precision of the assembly parts of the components; in addition, the rotor is influenced by working load in the working process, the actual interference magnitude of the connecting part can be reduced in different degrees, the connecting strength of the rotor cannot be guaranteed, rotor component parts are easy to loosen and fall off, and the working reliability of the closed-type circulating turbine power generation system is seriously influenced. In addition, such rotors require high machining quality and poor repeatable assembly.
The reliability is the foundation and guarantee that the closed-cycle turbine power generation system effectively plays the functions, and is one of the most important technical indexes of the closed-cycle turbine power generation system. Therefore, the structure of the rotor of the turbine power generation system and the sizes of the components of the rotor are reasonably designed according to the characteristics of the closed-cycle turbine power generation system and the bearing structure of the closed-cycle turbine power generation system, the manufacturing process of the rotor is scientifically formulated, the key for improving the reliability of the structure of the rotor of the closed-cycle turbine power generation system is realized, and the long-time stable operation of the closed-cycle turbine power generation system is also guaranteed.
Disclosure of Invention
The invention provides a high-reliability turbine power generation system rotor structure and a manufacturing process aiming at a closed circulation radial flow turbine power generation system rotor structure. According to the size parameters of a turbine, a gas compressor and a motor of the closed-cycle turbine power generation system, the machining of rotor parts is completed on the basis of reasonably determining the structures and technological parameters of a locking nut, a gas compressor impeller, a composite shaft sleeve, a motor shaft, a radial shaft sleeve and a turbine rotating shaft. Firstly, assembling parts of a motor shaft, secondly, assembling the radial shaft sleeve and the turbine rotating shaft and the motor shaft and the turbine rotating shaft, then, assembling the composite shaft sleeve and the motor shaft as well as the turbine rotating shaft, and finally, assembling the compressor impeller, the composite shaft sleeve, the turbine rotating shaft and the locking nut to form a complete rotor structure. The rotor adopts a threaded connection mode to realize the assembly of rotor parts, and the connection strength and rigidity of the rotor of the turbine power generation system can be effectively ensured; the composite shaft sleeve and the radial shaft sleeve are made of ceramic materials or composite materials with self-lubricating and high-temperature-resistant characteristics, so that abrasion between the rotor and the bearing can be reduced, and the structural reliability of the rotor of the turbine power generation system is ensured.
The technical scheme of the invention is as follows:
a high-reliability rotor structure of a turbine power generation system comprises a locking nut, a compressor impeller, a composite shaft sleeve, a motor shaft, a radial shaft sleeve and a turbine rotating shaft. The locking nut is assembled on a turbine rotating shaft close to one end of the gas compressor, and the thread turning direction of the locking nut is opposite to the rotating direction of a turbine power generation system rotor during working; the air inlet end of the compressor impeller is provided with an annular protective sleeve, the center of a hub of the compressor impeller is provided with a through hole, and the compressor impeller is provided with an outer cylindrical surface assembled with the composite shaft sleeve; the composite shaft sleeve is provided with an annular thrust end face matched with the axial bearing, the composite shaft sleeve is provided with an outer cylindrical face matched with the radial bearing, one end of the composite shaft sleeve is provided with an inner cylindrical face and a through hole which are respectively assembled with the compressor impeller and the turbine rotating shaft, the other end of the composite shaft sleeve is provided with an inner cylindrical face and a threaded hole which are respectively assembled with the motor shaft and the turbine rotating shaft, and the composite shaft sleeve is made of a ceramic material or a composite material with self-lubricating and high-temperature resistant characteristics; the motor shaft consists of a magnetic core, a long shaft sleeve and a short shaft sleeve, the magnetic core of the motor shaft is positioned inside the long shaft sleeve and the short shaft sleeve, the long shaft sleeve and the short shaft sleeve of the motor shaft are connected and assembled together in an interference manner, one end of a long shaft sleeve of the motor shaft is provided with a threaded hole assembled with the turbine rotating shaft, and one end of the short shaft sleeve of the motor shaft is provided with an outer cylindrical surface and a through hole which are respectively assembled with the composite shaft sleeve and the turbine rotating shaft; the radial shaft sleeve is provided with a threaded hole assembled with the turbine rotating shaft, an outer cylindrical surface matched with the radial bearing is arranged on the radial shaft sleeve, and the radial shaft sleeve is made of a ceramic material or a composite material with self-lubricating and high-temperature resistant characteristics; the turbine rotating shaft is formed by welding a turbine impeller and a rotating shaft together, the turbine rotating shaft is provided with an external thread assembled with a locking nut, the turbine rotating shaft is provided with an optical axis assembled with a compressor impeller and a composite shaft sleeve, the turbine rotating shaft is provided with an external thread assembled with the composite shaft sleeve, the turbine rotating shaft is provided with an optical axis assembled with a motor shaft short shaft sleeve, the turbine rotating shaft is provided with an external thread assembled with a motor shaft long shaft sleeve, the rotating direction of the external thread assembled with the motor shaft long shaft sleeve on the turbine rotating shaft is the same as the rotating direction of a rotor of a turbine power generation system during working, the turbine rotating shaft is provided with an external thread assembled with a radial shaft sleeve, the turbine rotating shaft is provided with a weight reducing cavity, and the turbine rotating shaft is provided with a clamping nut.
A high reliability turbine power generation system rotor manufacturing process includes the following steps:
a. determining the structure and process parameters of a rotor of a turbine power generation system: determining structural parameters of rotor components of the turbine power generation system, namely a locking nut, a compressor impeller, a composite shaft sleeve, a motor shaft, a radial shaft sleeve and a turbine rotating shaft according to size parameters of a turbine, a compressor and a motor of the closed-cycle turbine power generation system, and determining thread assembly torque among the rotor components of the turbine power generation system according to working state parameters and structural reliability requirements of the turbine power generation system on the basis;
b. manufacturing of rotor component parts of a turbine power generation system: manufacturing a locking nut, a compressor impeller, a composite shaft sleeve, a motor shaft, a radial shaft sleeve and a turbine rotating shaft according to the size parameters of the components of the rotor of the turbine power generation system determined in the step a;
c. assembling the motor shaft parts to form a complete motor shaft: firstly, adopting an interference assembly mode, heating a long shaft sleeve of a motor shaft to assemble a magnetic core of the motor together with a long shaft sleeve, then adopting the interference assembly mode, and heating a short shaft sleeve of the motor shaft to assemble the short shaft sleeve, the magnetic core and the long shaft sleeve together to form a complete motor shaft;
d. Assembling between the radial shaft sleeve and the turbine rotating shaft: b, assembling the radial shaft sleeve and the turbine rotating shaft together according to the thread assembling torque determined in the step a;
e. assembling between a motor shaft and a turbine rotating shaft: b, enabling the turbine rotating shaft to penetrate through the motor shaft, screwing the motor shaft and the turbine rotating shaft through threads according to the thread assembling torque determined in the step a, and ensuring that the matching end surfaces are attached to each other;
f. the assembly between the composite shaft sleeve and the motor shaft and between the composite shaft sleeve and the turbine rotating shaft is as follows: b, enabling an optical axis of the turbine rotating shaft to penetrate through a through hole of the composite shaft sleeve, aligning an outer cylindrical surface of the motor shaft short shaft sleeve with an inner cylindrical surface of the composite shaft sleeve, and assembling the composite shaft sleeve, the motor shaft and the turbine rotating shaft together by screwing threads between a threaded hole of the composite shaft sleeve and an external thread of the turbine rotating shaft and assembling the outer cylindrical surface of the motor shaft short shaft sleeve and the inner cylindrical surface of the composite shaft sleeve according to the thread assembling moment determined in the step a;
g. assembling the compressor impeller, the composite shaft sleeve, the turbine rotating shaft and the locking nut: firstly, the optical axis of the turbine rotating shaft penetrates through the through hole of the compressor impeller, so that the outer cylindrical surface of the compressor impeller and the inner cylindrical surface of the composite shaft sleeve are assembled together, the end faces are ensured to be attached tightly, then the locking nut and the external thread of the turbine rotating shaft are assembled together, and the locking nut and the external thread are screwed up according to the thread assembling torque determined in the step a, so that a complete rotor structure is formed.
The beneficial effects of the invention are:
according to the high-reliability turbine power generation system rotor structure and the manufacturing process, the radial shaft sleeve, the turbine rotating shaft, the motor shaft, the composite shaft sleeve and other parts are assembled in a threaded connection mode, so that the connection strength of the turbine power generation system rotor and the overall rigidity of the rotor can be effectively guaranteed, and the working reliability of the rotor is improved; the composite shaft sleeve and the radial shaft sleeve of the rotor and the bearing contact adopt ceramic materials or composite materials with self-lubricating and high temperature resistant characteristics, so that the abrasion between the rotor and the bearing of the turbine power generation system in the starting and stopping processes can be effectively reduced, the assembly precision between the rotor and the bearing of the turbine power generation system is ensured, the service life of the turbine power generation system is prolonged, and the structural reliability of the rotor of the turbine power generation system is further improved.
Drawings
Fig. 1 is a schematic structural diagram of a rotor of a high-reliability turbine power generation system according to an embodiment of the present invention.
Fig. 2 is a schematic view of a compressor wheel according to an embodiment of the present invention.
Fig. 3 is a schematic structural view of a composite bushing according to an embodiment of the present invention.
Fig. 4 is a schematic structural diagram of a motor shaft according to an embodiment of the invention.
Fig. 5 is a schematic structural diagram of a radial sleeve according to an embodiment of the present invention.
FIG. 6 is a schematic view of a turbine shaft structure according to an embodiment of the present invention.
1 locking nut 2 compressor impeller 3 composite shaft sleeve 4 motor shaft 5 radial shaft sleeve
6-turbine rotating shaft 7-compressor impeller air inlet end annular protection sleeve 8-compressor impeller through hole
9 outer cylindrical surface of compressor impeller 10 composite shaft sleeve and inner cylindrical surface of compressor impeller assembly
11 composite shaft sleeve annular thrust end face 12 composite shaft sleeve through hole
13 composite shaft sleeve and radial bearing assembled outer cylindrical surface 14 composite shaft sleeve threaded hole
15 inner cylindrical surface 16 motor shaft long shaft sleeve assembled by composite shaft sleeve and motor shaft
17 short shaft sleeve of motor shaft 18 magnetic core of motor shaft 19 outer cylindrical surface of motor shaft assembled with composite shaft sleeve
20 through hole for assembling motor shaft and turbine rotating shaft 21 matched threaded hole of motor shaft and turbine rotating shaft
22 outer cylindrical surface for assembling radial shaft sleeve and radial bearing
23 threaded hole for assembling radial shaft sleeve and turbine rotating shaft
24 external thread for assembling turbine rotating shaft and locking nut
25 optical axis assembled by turbine rotating shaft, compressor impeller and composite shaft sleeve
26 external thread for assembling turbine rotating shaft and composite shaft sleeve 27 optical axis for assembling turbine rotating shaft and motor shaft
28 external thread for assembling turbine rotating shaft and motor shaft 29 external thread for assembling turbine rotating shaft and radial shaft sleeve
30 turbine rotating shaft weight reduction cavity 31 turbine rotating shaft clamping nut
Detailed Description
It should be noted that the embodiments and features of the embodiments of the present invention may be combined with each other without conflict.
The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
A high-reliability rotor structure of a turbine power generation system comprises a locking nut 1, a compressor impeller 2, a composite shaft sleeve 3, a motor shaft 4, a radial shaft sleeve 5 and a turbine rotating shaft 6. The locking nut 1 is assembled on a turbine rotating shaft close to one end of the gas compressor, and the thread turning direction of the locking nut 1 is opposite to the rotating direction of a turbine power generation system rotor during working; the air inlet end of the compressor impeller 2 is provided with an annular protective sleeve 7, the center of a hub of the compressor impeller 2 is provided with a through hole 8, and the compressor impeller 2 is provided with an outer cylindrical surface 9 assembled with a composite shaft sleeve; the composite shaft sleeve 3 is provided with an annular thrust end face 11 matched with an axial bearing, the composite shaft sleeve 3 is provided with an outer cylindrical face 13 matched with the radial bearing, one end of the composite shaft sleeve 3 is provided with an inner cylindrical face 10 and a through hole 12 which are respectively assembled with a compressor impeller and a turbine rotating shaft, the other end of the composite shaft sleeve 3 is provided with an inner cylindrical face 15 and a threaded hole 14 which are respectively assembled with a motor shaft and the turbine rotating shaft, and the composite shaft sleeve 3 is made of a ceramic material or a composite material with self-lubricating and high-temperature resistant characteristics; the motor shaft 4 consists of a magnetic core 18, a long shaft sleeve 16 and a short shaft sleeve 17, the magnetic core 18 of the motor shaft 4 is positioned inside the long shaft sleeve 16 and the short shaft sleeve 17, the long shaft sleeve 16 and the short shaft sleeve 17 of the motor shaft 4 are connected and assembled together in an interference fit manner, one end of the long shaft sleeve 16 of the motor shaft 4 is provided with a threaded hole 21 assembled with the turbine rotating shaft, and one end of the short shaft sleeve 17 of the motor shaft 4 is provided with an outer cylindrical surface 19 and a through hole 20 which are respectively assembled with the composite shaft sleeve and the turbine rotating shaft; the radial shaft sleeve 5 is provided with a threaded hole 23 assembled with a turbine rotating shaft, the radial shaft sleeve 5 is provided with an outer cylindrical surface 22 matched with a radial bearing, and the radial shaft sleeve 5 is made of a ceramic material or a composite material with self-lubricating and high-temperature resistant characteristics; the turbine rotating shaft 6 is formed by welding a turbine impeller and a rotating shaft together, an external thread 24 assembled with a locking nut is arranged on the turbine rotating shaft 6, an optical axis 25 assembled with a compressor impeller and a composite shaft sleeve is arranged on the turbine rotating shaft 6, an external thread 26 assembled with the composite shaft sleeve is arranged on the turbine rotating shaft 6, an optical axis 27 assembled with a short shaft sleeve of a motor shaft is arranged on the turbine rotating shaft 6, an external thread 28 assembled with a long shaft sleeve of the motor shaft is arranged on the turbine rotating shaft 6, the rotating direction of the external thread 28 assembled with the long shaft sleeve of the motor shaft on the turbine rotating shaft 6 is the same as the rotating direction of a rotor of a turbine power generation system during working, an external thread 29 assembled with a radial shaft sleeve is arranged on the turbine rotating shaft 6, a weight reducing cavity 30 is arranged on the turbine rotating shaft 6, and a clamping nut 31 is arranged on the turbine rotating shaft 6.
A high reliability turbine power generation system rotor manufacturing process includes the following steps:
a. determining the structure and process parameters of a turbine power generation system rotor: determining structural parameters of rotor components of the turbine power generation system, namely a locking nut, a compressor impeller, a composite shaft sleeve, a motor shaft, a radial shaft sleeve and a turbine rotating shaft according to size parameters of a turbine, a compressor and a motor of the closed-cycle turbine power generation system, and determining a thread assembly torque between the rotor components of the turbine power generation system according to working state parameters and structural reliability requirements of the turbine power generation system on the basis;
according to the size parameters of the turbine impeller, the compressor impeller and the motor of the closed-cycle turbine power generation system, the diameter of a through hole 8 of the compressor impeller 2 is determined to be phi 10mm, the size of an outer cylindrical surface 9 is determined to be phi 24mm, the size of an inner cylindrical surface 10 of the composite shaft sleeve 3 is determined to be phi 24mm, the diameter of a through hole 12 is determined to be phi 10mm, the size of a threaded hole is determined to be M12 multiplied by 1, the size of an inner cylindrical surface 15 is determined to be phi 24mm, the size of a through hole 20 of the motor shaft 4 is determined to be phi 12mm, the size of a threaded hole 21 is determined to be M22 multiplied by 1, the size of a threaded hole 23 of the radial shaft sleeve 5 is determined to be M22 multiplied by 1, the size of an external thread 24 of the turbine rotating shaft 6 is determined to be M9 multiplied by 1, the size of an optical axis 25 is determined to be phi 10mm, and the size of a motor shaft is determined to be phi 10mm, The dimension of the external thread 26 is M12 × 1, the dimension of the optical axis 27 is Φ 12mm, and the dimension of the external thread 28 is M22 × 1.
b. Manufacturing of rotor component parts of a turbine power generation system: manufacturing a locking nut, a compressor impeller, a composite shaft sleeve, a motor shaft, a radial shaft sleeve and a turbine rotating shaft according to the size parameters of the components of the rotor of the turbine power generation system determined in the step a;
c. assembling the motor shaft parts to form a complete motor shaft: firstly, assembling a magnetic core 18 of a motor with a long shaft sleeve 16 by heating the long shaft sleeve 16 of the motor shaft in an interference assembly mode, and then assembling a short shaft sleeve 17, the magnetic core 18 and the long shaft sleeve 16 together by heating the short shaft sleeve 17 of the motor shaft in the interference assembly mode to form a complete motor shaft 4;
d. assembling the radial shaft sleeve and the turbine rotating shaft: b, assembling the radial shaft sleeve 5 and the turbine rotating shaft 6 together through screwing according to the thread assembling torque determined in the step a;
e. assembling a motor shaft and a turbine rotating shaft: b, enabling the turbine rotating shaft 6 to penetrate through the motor shaft 4, screwing the motor shaft 4 and the turbine rotating shaft 6 together through threads according to the thread assembling torque determined in the step a, and ensuring that the matching end surfaces are attached to each other;
f. the assembly between the composite shaft sleeve and the motor shaft and between the composite shaft sleeve and the turbine rotating shaft is as follows: b, enabling an optical axis 25 of the turbine rotating shaft to penetrate through a through hole 12 of the composite shaft sleeve, aligning an outer cylindrical surface 19 of a motor shaft short shaft sleeve 17 with an inner cylindrical surface 15 of the composite shaft sleeve 3, and assembling the composite shaft sleeve 3, the motor shaft 4 and the turbine rotating shaft 6 together by screwing threads between a threaded hole 14 of the composite shaft sleeve 3 and an external thread 26 of the turbine rotating shaft 6 and assembling the outer cylindrical surface 19 of the motor shaft short shaft sleeve 17 and the inner cylindrical surface 15 of the composite shaft sleeve according to the thread assembling moment determined in the step a to ensure that the matching end surfaces are attached tightly;
g. Assembling the compressor impeller, the composite shaft sleeve, the turbine rotating shaft and the locking nut: firstly, an optical axis 25 of the turbine rotating shaft penetrates through a through hole 8 of the compressor impeller, so that an outer cylindrical surface 9 of the compressor impeller and an inner cylindrical surface 10 of the composite shaft sleeve are assembled together, the end faces are ensured to be attached tightly, then the locking nut 1 and the external thread 24 of the turbine rotating shaft are assembled together, and the locking nut and the external thread are screwed tightly according to the thread assembling moment determined in the step a, so that a complete rotor structure is formed.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (5)
1. A high reliability turbine power generation system rotor structure which characterized in that: the device comprises a locking nut (1), a compressor impeller (2), a composite shaft sleeve (3), a motor shaft (4), a radial shaft sleeve (5) and a turbine rotating shaft (6);
the locking nut (1) is assembled on a turbine rotating shaft (6) close to one end of the compressor, and the thread turning direction of the locking nut (1) is opposite to the rotating direction of a turbine power generation system rotor during working;
an annular protective sleeve (7) is arranged at the air inlet end of the compressor impeller (2), a through hole (8) is formed in the center of a hub of the compressor impeller (2), and an outer cylindrical surface (9) assembled with the composite shaft sleeve is arranged on the compressor impeller (2);
An annular thrust end face (11) matched with an axial bearing is arranged on the composite shaft sleeve (3), an outer cylindrical face (13) matched with the radial bearing is arranged on the composite shaft sleeve (3), a first inner cylindrical face (10) and a through hole (12) which are respectively assembled with the compressor impeller (2) and the turbine rotating shaft (6) are arranged at one end of the composite shaft sleeve (3), and a second inner cylindrical face (15) and a threaded hole (14) which are respectively assembled with the motor shaft (4) and the turbine rotating shaft (6) are arranged at the other end of the composite shaft sleeve (3); the composite shaft sleeve (3) is made of a ceramic material or a composite material with self-lubricating and high-temperature-resistant characteristics;
the motor shaft (4) consists of a magnetic core (18), a long shaft sleeve (16) and a short shaft sleeve (17), the magnetic core (18) of the motor shaft (4) is positioned inside the long shaft sleeve (16) and the short shaft sleeve (17), the long shaft sleeve (16) and the short shaft sleeve (17) of the motor shaft (4) are connected and assembled together through interference, a threaded hole (21) assembled with the turbine rotating shaft (6) is formed in one end of the long shaft sleeve (16) of the motor shaft (4), and an outer cylindrical surface (19) and a through hole (20) which are respectively assembled with the composite shaft sleeve (3) and the turbine rotating shaft (6) are formed in one end of the short shaft sleeve (17) of the motor shaft (4);
the radial shaft sleeve (5) is provided with a threaded hole (23) assembled with the turbine rotating shaft (6), the radial shaft sleeve (5) is provided with an outer cylindrical surface (22) matched with a radial bearing, and the radial shaft sleeve (5) is made of a ceramic material or a composite material with self-lubricating and high-temperature resistant characteristics;
The turbine rotating shaft (6) is welded together by a turbine impeller and a rotating shaft, a first external thread (24) assembled with a locking nut (1) is arranged on the turbine rotating shaft (6), a first optical axis (25) assembled with a compressor impeller (2) and a composite shaft sleeve (3) is arranged on the turbine rotating shaft (6), a second external thread (26) assembled with the composite shaft sleeve (3) is arranged on the turbine rotating shaft (6), a second optical axis (27) assembled with a short shaft sleeve (17) of a motor shaft (4) is arranged on the turbine rotating shaft (6), a third external thread (28) assembled with a long shaft sleeve (16) of the motor shaft (4) is arranged on the turbine rotating shaft (6), the rotating direction of the third external thread (28) assembled with the long shaft sleeve (16) of the motor shaft (4) on the turbine rotating shaft (6) is the same as the rotating direction of a rotor of a turbine power generation system during working, a fourth external thread (29) assembled with the radial shaft sleeve (5) is arranged on the turbine rotating shaft (6); a weight-reducing cavity (30) is arranged on the turbine rotating shaft (6);
the first optical axis (25) of the turbine rotating shaft (6) is used for penetrating through the through hole (12) of the composite shaft sleeve (3) and the through hole (8) of the compressor impeller (2);
the outer cylindrical surface (19) of the short shaft sleeve (17) of the motor shaft (4) is used for being matched with the second inner cylindrical surface (15) of the composite shaft sleeve (3);
the threaded hole (14) of the composite shaft sleeve (3) is used for being matched with a second external thread (26) of the turbine rotating shaft (6);
The outer cylindrical surface (9) of the compressor impeller (2) is used for being matched with the first inner cylindrical surface (10) of the composite shaft sleeve (3);
the locking nut (1) is used for being matched with the first external thread (24) of the turbine rotating shaft (6).
2. The rotor structure of a high-reliability turbine power generation system according to claim 1, wherein: and a clamping nut (31) is arranged on the turbine rotating shaft (6).
3. A high-reliability turbine power generation system rotor manufacturing process of the high-reliability turbine power generation system rotor structure according to claim 1, characterized in that: the method comprises the following steps:
a. determining the structure and technological parameters of a rotor of the turbine power generation system;
b. manufacturing rotor component parts of the turbine power generation system;
c. assembling parts of the motor shaft (4) to form a complete motor shaft (4);
d. assembling the radial shaft sleeve (5) and the turbine rotating shaft (6);
e. assembling a motor shaft (4) and a turbine rotating shaft (6);
f. the composite shaft sleeve (3) is assembled with the motor shaft (4) and the turbine rotating shaft (6);
g. the compressor impeller (2), the composite shaft sleeve (3), the turbine rotating shaft (6) and the locking nut (1) are assembled.
4. The process of manufacturing a high reliability turbine power generation system rotor as claimed in claim 3, wherein: in the step f, a first optical axis (25) of the turbine rotating shaft (6) penetrates through the through hole (12) of the composite shaft sleeve (3), an outer cylindrical surface (19) of the short shaft sleeve (17) of the motor shaft (4) is aligned with a second inner cylindrical surface (15) of the composite shaft sleeve (3), and according to the thread assembling moment determined in the step a, the fit end surfaces are tightly attached through screwing of the threads between the threaded hole (14) of the composite shaft sleeve (3) and the second outer threads (26) of the turbine rotating shaft (6) and assembling of the outer cylindrical surface (19) of the short shaft sleeve (17) of the motor shaft (4) and the second inner cylindrical surface (15) of the composite shaft sleeve (3), and the composite shaft sleeve (3), the motor shaft (4) and the turbine rotating shaft (6) are assembled together.
5. The process of manufacturing a high reliability turbine power generation system rotor as claimed in claim 3, wherein: in the step g, firstly, a first optical axis (25) of the turbine rotating shaft (6) penetrates through a through hole (8) of the compressor impeller (2), so that an outer cylindrical surface (9) of the compressor impeller (2) and a first inner cylindrical surface (10) of the composite shaft sleeve (3) are assembled together, the end faces are ensured to be attached tightly, then, the locking nut (1) and a first external thread (24) of the turbine rotating shaft (6) are assembled together, and the locking nut and the first external thread are screwed according to the thread assembling moment determined in the step a to form a complete rotor structure.
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| CN112350505B (en) * | 2020-10-26 | 2022-10-28 | 北京动力机械研究所 | Rotating shaft structure of closed thermoelectric conversion system high-speed permanent magnet generator |
| CN112360573B (en) * | 2020-10-26 | 2023-06-13 | 北京动力机械研究所 | Rotating assembly of compact radial-flow turbine thermoelectric conversion system |
| CN112350507B (en) * | 2020-10-26 | 2022-07-12 | 北京动力机械研究所 | High-power-density closed-cycle thermoelectric conversion system rotor |
| CN112360577B (en) * | 2020-10-26 | 2023-05-12 | 北京动力机械研究所 | Rotor structure and process of combined impeller power generation system |
| CN112332597B (en) * | 2020-10-26 | 2022-11-18 | 北京动力机械研究所 | Motor shaft structure and process of high-power-density power generation system |
| CN112360574B (en) * | 2020-10-26 | 2023-03-24 | 北京动力机械研究所 | Rotating assembly structure of high-speed low-stress turbine power generation system |
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| US4132064A (en) * | 1977-05-26 | 1979-01-02 | The Garrett Corporation | Turbine engine with differential gearing between high pressure turbine and compressor |
| DE19938624C2 (en) * | 1999-08-14 | 2001-06-07 | Daimler Chrysler Ag | Exhaust gas turbocharger |
| US9664050B2 (en) * | 2013-10-25 | 2017-05-30 | Ecomotors, Inc. | Bearings for a turbomachine having an electric motor |
| CN106988784A (en) * | 2017-03-24 | 2017-07-28 | 中国北方发动机研究所(天津) | A kind of radial-flow type rotating shaft of supercharger turbine structure and its moulding process |
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