CN110332020B - Closed circulation turbine power generation system rotor structure based on air bearing - Google Patents
Closed circulation turbine power generation system rotor structure based on air bearing Download PDFInfo
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- CN110332020B CN110332020B CN201910647991.5A CN201910647991A CN110332020B CN 110332020 B CN110332020 B CN 110332020B CN 201910647991 A CN201910647991 A CN 201910647991A CN 110332020 B CN110332020 B CN 110332020B
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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
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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
- F01D25/16—Arrangement of bearings; Supporting or mounting bearings in casings
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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
- 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
- F04D29/266—Rotors specially for elastic fluids mounting compressor rotors on shafts
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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
- F04D29/60—Mounting; Assembling; Disassembling
- F04D29/601—Mounting; Assembling; Disassembling specially adapted for elastic fluid pumps
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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)
- Turbine Rotor Nozzle Sealing (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
Abstract
The invention relates to a closed type circulating turbine power generation system rotor structure based on an air bearing, which comprises a locking nut, a compressor impeller, a composite shaft sleeve, a connecting shaft sleeve, a transition shaft sleeve, a motor shaft, a fixed shaft sleeve, a radial shaft sleeve and a turbine rotor. The compressor impeller is provided with external threads, the composite shaft sleeve is provided with an annular end face matched with the axial thrust bearing, one end of the connecting shaft sleeve is provided with internal threads, the other end of the connecting shaft sleeve is provided with external threads, one end of the motor shaft is provided with internal threads assembled with the transition shaft sleeve, the other end of the motor shaft is provided with internal threads assembled with the external threads of the turbine rotor, the fixed shaft sleeve is provided with internal threads assembled with the external threads of the turbine rotor, and the turbine rotor is provided with external threads assembled with the internal threads of the fixed shaft sleeve and the internal threads of the motor shaft. The rotor structure aims at the characteristics of the air bearing, and the reliability of the closed circulation turbine power generation system can be improved.
Description
Technical Field
The invention belongs to the field of structural design of closed circulation radial turbine power generation systems, and particularly relates to a rotor structure of a closed circulation turbine power generation system based on an air bearing.
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. The typical closed-cycle radial-flow turbine power generation system mainly comprises a turbine, a gas compressor, a bearing, a generator, a heat regenerator, a coupling and other parts.
The rotor of the closed circulation radial flow turbine power generation system mainly comprises a turbine, a compressor impeller rotor and a generator rotor, is one of the most core components in the closed circulation radial flow turbine power generation system, and plays a decisive role in stable operation, thermoelectric conversion efficiency, reliability and service life of the system. The rotor of the existing closed type circulation radial flow turbine power generation system is mainly assembled by parts such as a turbine rotor, a main shaft, a compressor impeller, a motor shaft, a coupling and the like. In the operation process of the closed circulation radial flow turbine power generation system, the rotor is in a high-speed rotation state, the rotation speed of the rotor can reach tens of thousands of revolutions per minute, the rotation speed of the rotor of some closed circulation turbine power generation systems even reaches hundreds of thousands of revolutions per minute, and once the rotor breaks down, the closed circulation system can not normally work, and the structure damage of the closed circulation turbine power generation system can be caused. Therefore, the reasonable design of the rotor structure is very important for ensuring the reliability of the closed turbine power generation system.
The existing closed-cycle radial turbine power generation system rotor is generally connected between a turbine and a compressor impeller rotor and a motor rotor through interference connection by means of a coupler, and 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 adopts an interference connection structure, although the coaxiality of all parts can be ensured to a certain extent, the interference connection strength depends on the assembly size and tolerance of all parts, and high requirements are provided for the machining precision of an assembly part; in addition, the rotor is influenced by centrifugal load and thermal load in the working process, the actual interference magnitude of the connecting part can be reduced, the connecting strength and rigidity can not be ensured, rotor parts are easy to loosen, and the working reliability of the closed-type circulating turbine power generation system is seriously influenced.
Aiming at the characteristics and the use requirements of a rotor and a bearing of the closed circulation radial flow turbine power generation system, the rotor structure is reasonably designed, the influence of the assembly process on the rigidity and the manufacturing precision of the rotor is reduced, and the method is the key for improving the operation stability of the rotor and ensuring the reliability of the closed circulation radial flow turbine power generation system.
Disclosure of Invention
The invention provides a closed-cycle turbine power generation system rotor structure based on an air bearing, aiming at the design problem of a closed-cycle radial flow turbine power generation system rotor. According to the size parameters of a turbine impeller, a compressor impeller and a motor of the closed-cycle turbine power generation system, the structure sizes and the thread assembly torque of a locking nut, the compressor impeller, a composite shaft sleeve, a connecting shaft sleeve, a transition shaft sleeve, a motor shaft, a fixed shaft sleeve, a radial shaft sleeve and a turbine rotor are reasonably designed. On the basis of finishing the processing of rotor component parts, firstly finishing the assembly of a turbine end radial shaft sleeve assembly and a motor shaft, secondly finishing the assembly of the turbine end radial shaft sleeve assembly, the motor shaft and a turbine rotor, then finishing the assembly of a transition shaft sleeve and the motor shaft and the assembly of a compressor end composite shaft sleeve assembly, and finally finishing the assembly of the compressor end composite shaft sleeve assembly and the transition shaft sleeve and the assembly of a compressor impeller and the compressor end composite shaft sleeve assembly and the turbine rotor, and assembling a locking nut on the turbine rotor to realize the locking of the rotor structure and form a complete rotor structure of the turbine power generation system. The rotor reduces the number of supporting points, can enhance the rigidity of the rotor, reduces the difficulty in manufacturing and assembling the rotor, and can obviously improve the operation stability and the structural reliability of the closed circulation radial flow turbine power generation system.
The technical scheme of the invention is as follows:
a closed type circulating turbine power generation system rotor structure based on an air bearing comprises a locking nut, a compressor impeller, a composite shaft sleeve, a connecting shaft sleeve, a transition shaft sleeve, a motor shaft, a fixing shaft sleeve, a radial shaft sleeve and a turbine rotor. The rotation direction of the locking nut is opposite to the rotation direction of the turbine power generation system rotor during working; the compressor impeller is provided with a central through hole, and the compressor impeller is provided with an external thread assembled with the internal thread of the connecting shaft sleeve; the composite shaft sleeve is provided with an annular end face matched with the axial thrust bearing, is made of a wear-resistant and high-temperature-resistant ceramic material and is assembled on the connecting shaft sleeve through an inner hole; one end of the connecting shaft sleeve is provided with an internal thread which is assembled with the external thread of the compressor impeller, and the other end of the connecting shaft sleeve is provided with an external thread which is assembled with the internal thread of the transition shaft sleeve; the inner side of the transition shaft sleeve is provided with an internal thread assembled with the external thread of the connecting shaft sleeve, and the outer side of the transition shaft sleeve is provided with an external thread assembled with the internal thread at one end of the motor shaft; the motor shaft consists of a magnetic core and a motor shaft sleeve, the magnetic core of the motor shaft is positioned in the motor shaft sleeve, one end of the motor shaft is provided with an internal thread assembled with the transition shaft sleeve, and the other end of the motor shaft is provided with an internal thread assembled with the external thread of the turbine rotor; the radial shaft sleeve is of a circular ring structure, is made of wear-resistant and high-temperature-resistant ceramic materials, and is assembled on the fixed shaft sleeve through an inner hole; the fixed shaft is sleeved with an internal thread assembled with the external thread of the turbine rotor, and the fixed shaft is sleeved with an external cylindrical surface assembled with the radial shaft sleeve; the turbine rotor is formed by welding a turbine impeller and a rotating shaft, an external thread assembled with an internal thread of a fixed shaft sleeve and an internal thread of a motor shaft is arranged on the turbine rotor, an optical axis assembled with a through hole of an impeller of a compressor is arranged on the turbine rotor, an external thread assembled with a locking nut is arranged on the turbine rotor, and a clamping nut is arranged at one end of the turbine impeller of the turbine rotor.
A closed cycle turbine power generation system rotor manufacturing method based on an air bearing comprises the following steps:
a. determining the structural size parameters of a closed cycle turbine power generation system rotor based on an air bearing: determining the structural sizes of rotor components of the closed circulation turbine power generation system, namely a locking nut, the compressor impeller, a composite shaft sleeve, a connecting shaft sleeve, a transition shaft sleeve, a motor shaft, a fixed shaft sleeve, a radial shaft sleeve and a turbine rotor according to the size parameters of the turbine impeller, the compressor impeller and the motor of the closed circulation turbine power generation system;
b. determining the assembly thread tightening torque of the rotor structure of the turbine power generation system: determining a thread assembly locking torque between rotor components of the closed-cycle turbine power generation system based on the air bearing according to working state parameters of the closed-cycle turbine power generation system;
c. manufacturing the rotor structure component of the turbine power generation system: respectively processing a locking nut, a compressor impeller, a composite shaft sleeve, a connecting shaft sleeve, a transition shaft sleeve, a motor shaft, a fixed shaft sleeve, a radial shaft sleeve and a turbine rotor according to the structural size parameters of the rotor component of the closed-type circulating turbine power generation system based on the air bearing determined in the step a;
d. assembling the turbine end radial shaft sleeve assembly: assembling the radial shaft sleeve on the outer cylindrical surface of the fixed shaft sleeve in an interference fit mode to form a turbine end radial shaft sleeve assembly;
e. assembling a motor shaft magnetic core and a motor shaft sleeve: c, heating the motor shaft sleeve to realize interference assembly of the motor shaft magnetic core and the motor shaft sleeve, and ensuring that one end of the motor shaft magnetic core is tightly attached to the inner end face of the motor shaft sleeve to form a complete motor shaft;
f. assembling the turbine end radial shaft sleeve assembly and the motor shaft between the turbine rotor: d, according to the screwing torque determined in the step b, assembling the turbine end radial shaft sleeve assembly formed in the step d and the motor shaft formed in the step e on a turbine rotor in sequence through screwing by threads, and ensuring that the end faces are attached to each other;
g. assembling between the transition shaft sleeve and the motor shaft: b, according to the tightening torque determined in the step b, screwing through threads, and assembling the transition shaft sleeve on the motor shaft to enable the end face of the transition shaft sleeve to be tightly attached to the magnetic core of the motor shaft;
h. assembling a compressor end composite shaft sleeve assembly: assembling the composite shaft sleeve on the outer cylindrical surface of the connecting shaft sleeve in an interference fit mode to form a composite shaft sleeve assembly at the end of the compressor;
i. assembling the composite shaft sleeve component at the end of the compressor and the transition shaft sleeve: assembling the compressor end composite shaft sleeve assembly formed in the step h and the transition shaft sleeve together according to the screw assembling and screwing torque determined in the step b, so that the end surfaces are attached to each other;
j. assembling the compressor impeller, the compressor end composite shaft sleeve assembly and the turbine rotor: b, installing a compressor impeller on the turbine rotor through a central through hole, and assembling the compressor impeller, the compressor end composite shaft sleeve assembly and the turbine rotor together through screwing and assembling the external threads of the compressor impeller and the internal threads of the connecting shaft sleeve according to the screwing torque determined in the step b, and enabling the end faces to be attached tightly;
k. and (2) locking threads of a rotor assembly structure of the closed-cycle turbine power generation system: and c, according to the screw tightening torque determined in the step b, mounting a locking nut on the turbine rotor which is assembled in the step j, so as to lock the rotor structure and form a complete closed-cycle turbine power generation system rotor structure.
The invention has the beneficial effects that:
according to the closed type circulating turbine power generation system rotor based on the air bearing, the structure that the motor shaft, the turbine and the rotating shaft of the air compressor are integrated is adopted, a coupler is avoided, the integral rigidity of the rotating shaft is improved, and the stability and the reliability of the operation of the turbine power generation system rotor can be obviously enhanced; the composite shaft sleeve and the radial shaft sleeve are made of ceramic materials with self-lubricating property, wear resistance and high temperature resistance, so that the abrasion loss of a rotor in the starting and stopping processes of the closed-cycle turbine power generation system can be reduced, and the service life of the rotor of the turbine power generation system is prolonged; the compressor impeller, the composite shaft sleeve, the connecting shaft sleeve, the transition shaft sleeve, the motor shaft, the fixed shaft sleeve, the radial shaft sleeve and the turbine rotor are in threaded connection and end face pressing assembly structures, so that the structural strength of the rotor can be guaranteed, the integral rigidity of the rotor structure can be improved, the maintainability of the rotor structure of the closed-cycle turbine power generation system can be improved, the maintenance cost is reduced, in addition, the repeatable assembly of the rotor structure of the turbine power generation system can be realized, the test of the rotor is facilitated, and the reliability of the rotor system is improved.
Drawings
FIG. 1 is a schematic structural diagram of a rotor of a closed cycle turbine power generation system based on an air bearing according to an embodiment of the 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 connecting bushing according to an embodiment of the invention.
Fig. 5 is a schematic structural diagram of a transition bushing according to an embodiment of the present invention.
Fig. 6 is a schematic structural diagram of a motor shaft according to an embodiment of the invention.
Fig. 7 is a schematic structural diagram of a radial sleeve according to an embodiment of the present invention.
Fig. 8 is a schematic structural view of a fixed shaft sleeve according to an embodiment of the invention.
FIG. 9 is a schematic view of a turbine rotor according to an embodiment of the present invention.
The locking nut 2 is used for locking a compressor impeller 3, a composite shaft sleeve 4 is used for connecting a shaft sleeve 5, a transition shaft sleeve 6, a motor shaft 7, a radial shaft sleeve 8, a fixed shaft sleeve 9, a turbine rotor 10, a compressor impeller external thread 11, a compressor impeller through hole 12, a composite shaft sleeve inner hole 13, a composite shaft sleeve inner hole 14, a connecting shaft sleeve internal thread 15, a connecting shaft sleeve external thread 16, a transition shaft sleeve external thread 18, a transition shaft sleeve internal thread 19, a motor shaft core 20, a motor shaft sleeve 21, a transition shaft sleeve matching internal thread 22, a motor shaft and a turbine rotor external thread matched internal thread 23, a fixed shaft sleeve internal thread 24, a fixed shaft sleeve external thread 25, a radial shaft sleeve external thread 26, a turbine rotor external thread 27, a clamping nut 28, a turbine rotor optical axis 29, and a locking thread matched external thread of the turbine rotor.
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 embodiments with reference to the attached drawings.
A closed type circulating turbine power generation system rotor structure based on an air bearing comprises a locking nut 1, a compressor impeller 2, a composite shaft sleeve 3, a connecting shaft sleeve 4, a transition shaft sleeve 5, a motor shaft 6, a fixed shaft sleeve 7, a radial shaft sleeve 8 and a turbine rotor 9. The rotation direction of the locking nut 1 is opposite to the rotation direction of a rotor of the turbine power generation system when the rotor works; the compressor impeller 2 is provided with a central through hole 11, and the compressor impeller 2 is provided with an external thread 10 assembled with the internal thread of the connecting shaft sleeve; the composite shaft sleeve 3 is provided with an annular end face 12 matched with an axial thrust bearing, the composite shaft sleeve 3 is made of wear-resistant and high-temperature-resistant ceramic materials, and the composite shaft sleeve 3 is assembled on the connecting shaft sleeve through an inner hole 13; one end of the connecting shaft sleeve 4 is provided with an internal thread 14 assembled with the external thread 10 of the compressor impeller, and the other end of the connecting shaft sleeve 4 is provided with an external thread 15 assembled with the internal thread of the transition shaft sleeve; the inner side of the transition shaft sleeve 5 is provided with an internal thread 18 assembled with the external thread of the connecting shaft sleeve, and the outer side of the transition shaft sleeve 5 is provided with an external thread 17 assembled with the internal thread at one end of the motor shaft; the motor shaft 6 consists of a magnetic core 19 and a motor shaft sleeve 20, the magnetic core of the motor shaft 6 is positioned in the motor shaft sleeve, one end of the motor shaft 6 is provided with an internal thread 21 assembled with the transition shaft sleeve, and the other end of the motor shaft 6 is provided with an internal thread 22 assembled with the external thread of the turbine rotor; the radial shaft sleeve 7 is of a circular structure, the radial shaft sleeve 7 is made of a wear-resistant and high-temperature-resistant ceramic material, and the radial shaft sleeve 7 is assembled on the fixed shaft sleeve 8 through an inner hole; the fixed shaft sleeve 8 is provided with an internal thread 23 assembled with the external thread of the turbine rotor, and the fixed shaft sleeve 8 is provided with an external cylindrical surface 24 assembled with the radial shaft sleeve; the turbine rotor 9 is formed by welding a turbine impeller and a rotating shaft, an external thread 26 assembled with an internal thread of a fixed shaft sleeve and an internal thread of a motor shaft is arranged on the turbine rotor 9, an optical axis 28 assembled with a through hole of an impeller of a compressor is arranged on the turbine rotor 9, an external thread 29 assembled with a locking nut is arranged on the turbine rotor 9, and a clamping nut 27 is arranged at one end of the turbine impeller of the turbine rotor 9.
A method for manufacturing a closed cycle turbine power generation system rotor structure based on an air bearing comprises the following steps:
a method for manufacturing a closed cycle turbine power generation system rotor structure based on an air bearing comprises the following steps:
a. determining the structural size parameters of a closed cycle turbine power generation system rotor based on an air bearing: according to the size parameters of a turbine impeller, a compressor impeller and a motor of the closed circulation turbine power generation system, determining the structural sizes of rotor components of the closed circulation turbine power generation system, namely a locking nut, the compressor impeller, a composite shaft sleeve, a connecting shaft sleeve, a transition shaft sleeve, a motor shaft, a fixed shaft sleeve, a radial shaft sleeve and a turbine rotor;
the diameter of a turbine impeller of a certain type of closed cycle turbine power generation system of the embodiment is phi 90mm, the diameter of a compressor impeller is phi 96mm, the diameter of a motor shaft is phi 38mm, the rotating direction of a rotor of the turbine power generation system in working is right-handed, the size of an internal thread of a lock nut 1 is determined to be M9X 1-H7H7-LH according to the size parameters of the turbine impeller, the compressor impeller and the motor of the closed cycle turbine power generation system, the size of an external thread 12 of the compressor impeller 2 is determined to be M20X 1-p6p6-LH, the diameter of a through hole is phi 10mm, the internal diameter of a composite shaft sleeve 3 is phi 28mm, the size of an internal thread 14 of a determined connecting shaft sleeve 4 is M20X 1-H7H7-LH, the size of an external thread 15 is M24X 1-p6p6-LH, the sizes of an internal thread 18 and an external thread 17 of a determined transition shaft sleeve 5 are respectively M24X 1-H7-LH and M36X 1-p 866 p 6-3586, the inner hole diameter of the magnetic core 19 of the motor shaft 6 is determined to be phi 14mm, the size of the internal thread 21 is M36 multiplied by 1-H7H7-LH, the size of the internal thread 22 is M20 multiplied by 1-H7H7-LH, the inner diameter and the outer diameter of the determined radial shaft sleeve 7 are phi 28mm and phi 36mm respectively, the size of the internal thread 23 of the determined fixed shaft sleeve 8 is M24 multiplied by 1-H7H7-LH, the size of the external thread 29 of the determined turbine rotor 9 is M9 multiplied by 1-p6p6-LH, the optical axis diameter is phi 10mm, and the size of the external thread 26 is M24 multiplied by 1-p6p 6-LH.
b. Determining the assembly thread tightening torque of the rotor structure of the turbine power generation system: determining a thread assembly locking torque between rotor components of the closed-cycle turbine power generation system based on the air bearing according to working state parameters of the closed-cycle turbine power generation system;
c. manufacturing the rotor structure component of the turbine power generation system: according to the structural size parameters of the rotor component of the closed cycle turbine power generation system based on the air bearing determined in the step a, respectively processing a locking nut, a compressor impeller, a composite shaft sleeve, a connecting shaft sleeve, a transition shaft sleeve, a motor shaft, a fixed shaft sleeve, a radial shaft sleeve and a turbine rotor;
d. assembling a turbine end radial shaft sleeve assembly: assembling the radial shaft sleeve on the outer cylindrical surface of the fixed shaft sleeve in an interference fit mode to form a turbine end radial shaft sleeve assembly;
e. assembling a motor shaft magnetic core and a motor shaft sleeve: c, heating the motor shaft sleeve to realize interference assembly of the motor shaft magnetic core and the motor shaft sleeve, and ensuring that one end of the motor shaft magnetic core is tightly attached to the inner end face of the motor shaft sleeve to form a complete motor shaft;
f. assembling the turbine end radial shaft sleeve assembly and the motor shaft between the turbine rotor: c, according to the screwing torque determined in the step b, screwing through threads, sequentially assembling the turbine end radial shaft sleeve assembly formed in the step d and the motor shaft formed in the step e on a turbine rotor, and ensuring that end faces are attached to each other;
g. assembling the transition shaft sleeve and the motor shaft: c, according to the screwing torque determined in the step b, assembling the transition shaft sleeve on the motor shaft through screwing of the threads, so that the end face of the transition shaft sleeve is tightly attached to the magnetic core of the motor shaft;
h. assembling a compressor end composite shaft sleeve assembly: assembling the composite shaft sleeve on the outer cylindrical surface of the connecting shaft sleeve in an interference fit mode to form a compressor end composite shaft sleeve assembly;
i. assembling the composite shaft sleeve component at the end of the compressor and the transition shaft sleeve: assembling the compressor end composite shaft sleeve assembly formed in the step h and the transition shaft sleeve together according to the screw assembling and screwing torque determined in the step b, so that the end surfaces are attached to each other;
j. assembling the compressor impeller, the compressor end composite shaft sleeve assembly and the turbine rotor: b, installing a compressor impeller on the turbine rotor through a central through hole, and assembling the compressor impeller, the compressor end composite shaft sleeve assembly and the turbine rotor together through screwing and assembling the external threads of the compressor impeller and the internal threads of the connecting shaft sleeve according to the screwing torque determined in the step b, and enabling the end faces to be attached tightly;
k. and (2) locking threads of a rotor assembly structure of the closed-cycle turbine power generation system: and (c) according to the screw tightening torque determined in the step (b), mounting a locking nut on the turbine rotor which is assembled in the step (j), so as to realize locking of the rotor structure and form a complete closed-cycle turbine power generation system rotor structure.
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 (6)
1. The utility model provides a closed circulation turbine power generation system rotor structure based on air supporting bearing which characterized in that: the device comprises a locking nut (1), a compressor impeller (2), a composite shaft sleeve (3), a connecting shaft sleeve (4), a transition shaft sleeve (5), a motor shaft (6), a fixed shaft sleeve (7), a radial shaft sleeve (8) and a turbine rotor (9);
the rotating direction of the locking nut (1) is opposite to the rotating direction of a rotor of the turbine power generation system when the rotor works;
the compressor impeller (2) is provided with a central through hole (11), and the compressor impeller (2) is provided with an external thread (10) assembled with the internal thread of the connecting shaft sleeve;
the composite shaft sleeve (3) is provided with an annular end face (12) matched with the axial thrust bearing, the composite shaft sleeve (3) is made of a wear-resistant and high-temperature-resistant ceramic material, and the composite shaft sleeve (3) is assembled on the connecting shaft sleeve through an inner hole (13);
one end of the connecting shaft sleeve (4) is provided with an internal thread (14) assembled with the external thread (10) of the compressor impeller, and the other end of the connecting shaft sleeve (4) is provided with an external thread (15) assembled with the internal thread of the transition shaft sleeve;
the inner side of the transition shaft sleeve (5) is provided with an internal thread (18) assembled with the external thread of the connecting shaft sleeve, and the outer side of the transition shaft sleeve (5) is provided with an external thread (17) assembled with the internal thread at one end of the motor shaft;
the motor shaft (6) consists of a magnetic core (19) and a motor shaft sleeve (20), the magnetic core of the motor shaft (6) is positioned in the motor shaft sleeve, one end of the motor shaft (6) is provided with an internal thread (21) assembled with the transition shaft sleeve, and the other end of the motor shaft (6) is provided with an internal thread (22) assembled with the external thread of the turbine rotor;
the radial shaft sleeve (8) is of a circular structure, the radial shaft sleeve (8) is made of wear-resistant and high-temperature-resistant ceramic materials, and the radial shaft sleeve (8) is assembled on the fixed shaft sleeve (7) through an inner hole;
the fixed shaft sleeve (7) is provided with an internal thread (23) assembled with the external thread of the turbine rotor, and the fixed shaft sleeve (7) is provided with an external cylindrical surface (24) assembled with the radial shaft sleeve.
2. The closed cycle turbine power generation system rotor structure based on an air bearing as claimed in claim 1, wherein: turbine rotor (9) are formed by turbine wheel and pivot welding, have on turbine rotor (9) with external screw thread (26) of fixed axle sleeve internal thread and motor shaft internal thread looks assembly, there is optical axis (28) with the assembly of compressor impeller through-hole on turbine rotor (9), have on turbine rotor (9) with external screw thread (29) of lock nut looks assembly, the turbine wheel one end of turbine rotor (9) has clamping nut (27).
3. The method of manufacturing a closed cycle turbine power generation system rotor structure based on an air bearing as claimed in claim 1, wherein: the method comprises the following steps:
a. determining the structural size parameters of a rotor of a closed cycle turbine power generation system based on an air bearing;
b. determining the assembly thread tightening torque of a rotor structure of the turbine power generation system;
c. manufacturing the rotor structure component of the turbine power generation system;
d. assembling a turbine end radial shaft sleeve assembly;
e. assembling a motor shaft magnetic core and a motor shaft sleeve;
f. assembling the turbine end radial shaft sleeve assembly, the motor shaft and the turbine rotor;
g. assembling between the transition shaft sleeve and the motor shaft: b, according to the tightening torque determined in the step b, screwing through threads, and assembling the transition shaft sleeve on the motor shaft to enable the end face of the transition shaft sleeve to be tightly attached to the magnetic core of the motor shaft;
h. assembling a compressor end composite shaft sleeve assembly: assembling the composite shaft sleeve on the outer cylindrical surface of the connecting shaft sleeve in an interference fit mode to form a compressor end composite shaft sleeve assembly;
i. assembling the composite shaft sleeve component at the end of the compressor and the transition shaft sleeve: assembling the compressor end composite shaft sleeve assembly formed in the step h and the transition shaft sleeve together according to the screw assembling and screwing torque determined in the step b, so that the end surfaces are attached to each other;
j. assembling the compressor impeller, the compressor end composite shaft sleeve assembly and the turbine rotor;
k. and (2) locking threads of a rotor assembly structure of the closed-cycle turbine power generation system: and c, according to the screw tightening torque determined in the step b, mounting a locking nut on the turbine rotor which is assembled in the step j, so as to lock the rotor structure and form a complete closed-cycle turbine power generation system rotor structure.
4. The method of manufacturing a closed cycle turbine power generation system rotor structure based on an air bearing as claimed in claim 3, wherein: in step d: and the radial shaft sleeve is assembled on the outer cylindrical surface of the fixed shaft sleeve in an interference fit mode to form a turbine end radial shaft sleeve assembly.
5. The method of claim 3, wherein the rotor structure of the closed cycle turbine power generation system comprises: and f, according to the screwing torque determined in the step b, screwing through threads, sequentially assembling the radial shaft sleeve assembly at the turbine end formed in the step d and the motor shaft formed in the step e on a turbine rotor, and ensuring that the end surfaces are attached to each other.
6. The method of manufacturing a closed cycle turbine power generation system rotor structure based on an air bearing as claimed in claim 3, wherein: in step j, the compressor impeller is installed on the turbine rotor through the central through hole, according to the screwing torque determined in the step b, the compressor impeller is assembled with the compressor end composite shaft sleeve assembly and the turbine rotor through the screwing assembly of the threads between the external threads of the compressor impeller and the internal threads of the connecting shaft sleeve, and the end faces are attached tightly.
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| CN112049687B (en) * | 2020-07-28 | 2023-02-03 | 北京控制工程研究所 | High temperature resistant turbine generator rotor for space thermoelectric conversion and method of assembling same |
| 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 |
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| GB719316A (en) * | 1951-12-20 | 1954-12-01 | Geoffrey Bertram Robert Feilde | Improvements in gas-turbo-generator installations |
| US6305169B1 (en) * | 1999-02-22 | 2001-10-23 | Ralph P. Mallof | Motor assisted turbocharger |
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| US5605045A (en) * | 1995-09-18 | 1997-02-25 | Turbodyne Systems, Inc. | Turbocharging system with integral assisting electric motor and cooling system therefor |
| JP5599368B2 (en) * | 2011-06-08 | 2014-10-01 | 三菱電機株式会社 | Motor rotor structure of electric turbocharger and its assembly method |
| CN202360227U (en) * | 2011-11-01 | 2012-08-01 | 哈尔滨东安发动机（集团）有限公司 | Integral cantilever rotor structure |
| CN103321685B (en) * | 2013-07-12 | 2015-02-04 | 中国北方发动机研究所(天津) | Through-hole connection method and connection structure of titanium aluminum turbine impeller and rotating shaft |
| US9664050B2 (en) * | 2013-10-25 | 2017-05-30 | Ecomotors, Inc. | Bearings for a turbomachine having an electric motor |
| CN105927294B (en) * | 2016-05-18 | 2018-05-15 | 中国北方发动机研究所(天津) | Exhaust turbine generation device |
| 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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| GB719316A (en) * | 1951-12-20 | 1954-12-01 | Geoffrey Bertram Robert Feilde | Improvements in gas-turbo-generator installations |
| US6305169B1 (en) * | 1999-02-22 | 2001-10-23 | Ralph P. Mallof | Motor assisted turbocharger |
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