CN110344891B - Rotor structure and process of long-life closed circulation turbine power generation system - Google Patents
Rotor structure and process of long-life closed circulation turbine power generation system Download PDFInfo
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- CN110344891B CN110344891B CN201910647986.4A CN201910647986A CN110344891B CN 110344891 B CN110344891 B CN 110344891B CN 201910647986 A CN201910647986 A CN 201910647986A CN 110344891 B CN110344891 B CN 110344891B
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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
- B23P11/00—Connecting or disconnecting metal parts or objects by metal-working techniques not otherwise provided for
- B23P11/02—Connecting or disconnecting metal parts or objects by metal-working techniques not otherwise provided for by first expanding and then shrinking or vice versa, e.g. by using pressure fluids; by making force fits
- B23P11/025—Connecting or disconnecting metal parts or objects by metal-working techniques not otherwise provided for by first expanding and then shrinking or vice versa, e.g. by using pressure fluids; by making force fits by using heat or cold
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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
Abstract
The invention relates to a long-life closed cycle turbine power generation system rotor structure and process, which comprises a compressor impeller, an elastic locking ring, a shaft radial composite shaft sleeve, a compressor fixed shaft sleeve, a motor shaft, a radial shaft sleeve, a turbine fixed shaft sleeve and a turbine rotor. On the basis of finishing the processing of rotor parts, firstly assembling a turbine end shaft sleeve assembly, a compressor end shaft sleeve assembly and a motor shaft, secondly assembling a turbine rotor with the turbine end shaft sleeve assembly and the motor shaft, then assembling the compressor end shaft sleeve assembly with the motor shaft, and finally assembling a compressor impeller with a compressor end fixed shaft sleeve, a turbine rotor and an elastic locking ring to form a complete rotor structure. The rotor has the characteristics of compact structure, high connection strength between parts, effective friction torque between the rotor and a bearing and the like, and is favorable for improving the structural reliability and the service life of a closed circulation radial flow turbine power generation system.
Description
Technical Field
The invention belongs to the field of structural design of a closed-cycle radial turbine power generation system, and particularly relates to a rotor structure and a process of a long-life closed-cycle turbine power generation system.
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 structurally comprises a radial-flow turbine, a radial-flow compressor, a generator, a heat regenerator and the like.
The rotor is the most central component in a closed circulation radial flow turbine power generation system and mainly comprises a turbine, a compressor rotor and a generator rotor. The design and manufacturing quality of the rotor structure directly affect the stable operation, thermoelectric conversion efficiency, reliability, service life and the like of the system. 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, some of the rotors even can reach more than one hundred thousands of revolutions per minute, and once the rotor structure 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 structure of the rotor is very important for guaranteeing the safe and reliable operation of the closed turbine power generation system.
The existing closed circulation radial turbine power generation system rotor mainly comprises a turbine rotor, a main shaft, a compressor impeller, a motor shaft, a coupler and other parts, and is connected with the motor rotor through mechanical interference by means of the coupler, and specifically comprises the following components: 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 parts formed by the rotor are connected in an interference manner, and although the coaxiality of the parts can be ensured to a certain extent, the interference connection strength depends on the assembly size and the tolerance of the parts, so that high requirements are provided for the machining precision of the assembly parts of the parts; in addition, the actual interference magnitude of the connecting part of the rotor in the working process can be reduced, the connecting strength and the rigidity can not be effectively guaranteed, loosening and loosening are easily generated between rotor parts, and the working reliability of the closed circulation turbine power generation system is seriously influenced.
The long life and high reliability are the general requirement of closed circulation runoff turbine power generation system, to the characteristics and the operation requirement of closed circulation runoff turbine power generation system rotor and bearing, rational design rotor structure improves rotor moving stability, and the wearing and tearing between reduction start-stop in-process rotor and the bearing are the key of guaranteeing closed circulation turbine power generation system high reliability and long-life.
Disclosure of Invention
The invention provides a rotor structure of a closed-cycle turbine power generation system with a long service life and a forming process, aiming at the requirements of the closed-cycle radial-flow turbine power generation system on long service life and high reliability. According to the structural size parameters of a turbine, a gas compressor and a motor of the closed-cycle turbine power generation system, the structural parameters and the process parameters of an impeller of the gas compressor, an elastic locking ring, a shaft radial composite shaft sleeve, a gas compressor fixed shaft sleeve, a motor shaft, a radial shaft sleeve, a turbine fixed shaft sleeve and a turbine rotor are reasonably designed. On the basis of finishing the processing of the rotor structure component, firstly assembling a turbine end shaft sleeve assembly, a compressor end shaft sleeve assembly and a motor shaft, secondly assembling a turbine rotor and the turbine end shaft sleeve assembly and the motor shaft, then assembling the compressor end shaft sleeve assembly and the motor shaft, and finally assembling a compressor impeller and a compressor end fixed shaft sleeve, a turbine rotor and an elastic locking ring. The rotor realizes the integrated structure of the rotating shaft of the turbine and the compressor and the shaft of the motor, can obviously improve the operation stability of the closed circulation radial flow turbine power generation system, prevents the rotor structure from loosening in the working process, improves the working reliability of the rotor, and can also reduce the abrasion loss of the contact part of the bearing and the rotor in the starting and stopping process of the turbine power generation system and improve the service life of the system.
The technical scheme of the invention is as follows:
a long-life closed cycle turbine power generation system rotor structure comprises a compressor impeller, an elastic locking ring, a shaft radial composite shaft sleeve, a compressor fixed shaft sleeve, a motor shaft, a radial shaft sleeve, a turbine fixed shaft sleeve and a turbine rotor. The compressor impeller is provided with an outer cylindrical surface assembled with a compressor end fixing shaft sleeve, a blind hole is formed in the center of the compressor impeller, a unthreaded hole, a locking ring groove and an internal thread are formed in the blind hole in the center of the compressor impeller, the rotation direction of the internal thread of the compressor impeller is the same as the rotation direction of a turbine power generation system rotor during working, and a nut for assembling and clamping is arranged at the air inlet end of the compressor impeller; the elastic locking ring is arranged in the locking ring grooves of the turbine rotor and the compressor impeller; the axial and radial composite shaft sleeve is provided with an annular end face matched with the axial gas floating bearing, an outer cylindrical face matched with the radial gas floating bearing is arranged on the axial and radial composite shaft sleeve, the axial and radial composite shaft sleeve is made of a ceramic material with self-lubrication, wear resistance and high temperature resistance, and the axial and radial composite shaft sleeve is assembled on the end fixing shaft sleeve of the compressor through an inner hole; one end of the compressor fixed shaft sleeve is provided with an inner cylindrical surface assembled with a compressor impeller, one end of the compressor fixed shaft sleeve is provided with an outer cylindrical surface assembled with the composite shaft sleeve, and the other end of the compressor fixed shaft sleeve is provided with an external thread assembled with an internal thread of a 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 compressor end fixing 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 turbine fixed shaft sleeve is characterized in that the radial shaft sleeve is of an annular structure, an outer cylindrical surface of the radial shaft sleeve is matched with the radial floating bearing, the radial shaft sleeve is made of a self-lubricating, wear-resistant and high-temperature-resistant ceramic material, and the radial shaft sleeve is assembled on the turbine fixed shaft sleeve through an inner hole; the turbine end fixing shaft sleeve is provided with an internal thread assembled with the external thread of the turbine rotor, and an external cylindrical surface assembled with the radial shaft sleeve is sleeved on the turbine end fixing shaft sleeve; the turbine rotor is formed by turbine wheel and pivot welding, have on the turbine rotor with the external screw thread of turbine end fixed axle sleeve internal thread and motor shaft internal thread assembly mutually, have on the turbine rotor with the external screw thread of compressor wheel internal thread assembly mutually, the last locking annular that assembles with the elastic locking ring that has of turbine rotor, turbine rotor one end has and is used for assembling the nut that presss from both sides tightly.
A long-life closed cycle turbine power generation system rotor forming process comprises the following steps:
a. determining structural size parameters of a long-life closed-cycle turbine power generation system rotor: according to the size parameters of a turbine, a gas compressor and a motor of the closed-cycle turbine power generation system, determining the structural sizes of rotor components of the turbine power generation system, namely a gas compressor impeller, an elastic locking ring, a shaft radial composite shaft sleeve, a gas compressor fixed shaft sleeve, a motor shaft, a turbine fixed shaft sleeve, a radial shaft sleeve and a turbine rotor;
b. determining the screw thread assembling tightening torque between the rotor component parts: determining a screw thread assembling and screwing moment between parts of a closed cycle turbine power generation system rotor according to the rotating speed, the torque transmission requirement and the dynamic parameters of the closed cycle turbine power generation system rotor;
c. manufacturing long-life closed cycle turbine power generation system rotor component parts: b, processing a compressor impeller, an elastic locking ring, a shaft radial composite shaft sleeve, a compressor fixed shaft sleeve, a motor shaft, a turbine fixed shaft sleeve, a radial shaft sleeve and a turbine rotor according to the structural dimension parameters of the components consisting of the turbine power generation system rotor determined in the step a;
d. assembling a turbine end fixing shaft sleeve and a radial shaft sleeve: assembling the radial shaft sleeve on the outer cylindrical surface of the turbine end fixed shaft sleeve, and ensuring that the matching end surface is attached tightly to form a turbine end shaft sleeve assembly;
e. assembling a compressor end fixing shaft and a shaft radial composite shaft sleeve: assembling the axial and radial composite shaft sleeve on the outer cylindrical surface of the fixed shaft sleeve of the compressor end, and ensuring that the matching end surface is attached tightly to form a shaft sleeve component of the compressor end;
f. 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, so that one end of the motor shaft magnetic core is tightly attached to the inner end face of the shaft sleeve to form a complete motor shaft;
g. assembling a turbine rotor with a turbine end shaft sleeve assembly and a motor shaft: d, assembling the turbine end shaft sleeve assembly formed in the step d and the motor shaft formed in the step f on the turbine rotor in sequence through screwing according to the assembling and screwing torque determined in the step b, and enabling the end faces to be attached to each other;
h. assembling a compressor end shaft sleeve assembly and a motor shaft: e, enabling the compressor end shaft sleeve assembly formed in the step e to penetrate through a turbine rotor, assembling and screwing the compressor end shaft sleeve assembly on a motor shaft through threads according to the assembling and screwing torque determined in the step b, and enabling the end face of the compressor end shaft sleeve to be tightly attached to a magnetic core of the motor shaft;
i. assembling the compressor impeller with a compressor fixed end shaft sleeve, a turbine rotor and an elastic locking ring: firstly, the elastic locking ring is installed in a locking ring groove of the turbine rotor, according to the assembling tightening torque determined in the step b, the compressor impeller is assembled with the compressor fixed end shaft sleeve, the turbine rotor and the elastic locking ring together through screwing assembly of the compressor impeller and the turbine rotor, and a complete rotor structure is formed.
The invention has the beneficial effects that:
according to the long-life closed type circulating turbine power generation system rotor structure and the forming process, the coaxial structure of the rotating shaft of the turbine and the compressor and the motor shaft is adopted, so that the use of a coupler is avoided, the integral rigidity of the rotor can be obviously improved, and the stability of the operation of the rotor of the turbine power generation system is enhanced; the axial and radial 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 the contact part of the gas floating bearing and the rotor in the starting and stopping processes of the closed-cycle turbine power generation system can be effectively reduced, and the service life of the turbine power generation system is prolonged; the locking structure is assembled by adopting threads, so that the rotor structure can be prevented from loosening in the working process, and the working reliability of the rotor is improved.
Drawings
Fig. 1 is a schematic structural diagram of a rotor of a long-life closed-cycle turbine power generation system according to an embodiment of the invention.
Fig. 2 is a partially enlarged schematic view of the locking structure according to the embodiment of the present invention.
Fig. 3 is a schematic view of a compressor wheel according to an embodiment of the present invention.
Fig. 4 is a schematic structural view of a composite shaft sleeve in the radial direction of the shaft according to the embodiment of the invention.
Fig. 5 is a schematic view of a compressor end fixing shaft sleeve structure 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 view of a turbine end fixing sleeve according to an embodiment of the invention.
FIG. 8 is a schematic view of a turbine rotor according to an embodiment of the present invention.
1 compressor impeller 2 elastic locking ring 3 axial radial composite shaft sleeve 4 compressor end fixed shaft sleeve
5 motor shaft 6 radial shaft sleeve 7 turbine end fixed shaft sleeve 8 turbine rotor
9 compressor impeller outer cylindrical surface 10 compressor impeller locking ring groove 11 compressor impeller internal thread
12 compressor impeller unthreaded hole 13 compressor impeller clamping nut
Inner hole of 14-axis radial composite shaft sleeve and 15-axis radial composite shaft sleeve annular end face
16-shaft radial composite shaft sleeve outer cylindrical surface 17 compressor end fixing shaft sleeve inner cylindrical surface
External thread of outer cylindrical surface of 18 compressor fixed shaft sleeve and 19 compressor fixed shaft sleeve
20 motor shaft magnetic core 21 motor shaft sleeve
22 internal thread matched with external thread of turbine rotor on motor shaft
Internal thread of internal thread 24 turbine end fixed shaft sleeve assembled by 23 motor shaft and compressor end fixed shaft sleeve
25 outer cylindrical surface of turbine fixed shaft sleeve 26 turbine rotor external screw thread 27 turbine rotor locking ring groove
28 turbine rotor and compressor impeller assembly external thread 29 turbine rotor 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 embodiments with reference to the attached drawings.
A long-life closed cycle turbine power generation system rotor structure comprises a compressor impeller 1, an elastic locking ring 2, a shaft radial composite shaft sleeve 3, a compressor fixed shaft sleeve 4, a motor shaft 5, a radial shaft sleeve 6, a turbine fixed shaft sleeve 7 and a turbine rotor 8. The compressor impeller 1 is provided with an outer cylindrical surface 9 assembled with a compressor end fixing shaft sleeve, the center of the compressor impeller 1 is provided with a blind hole, the blind hole in the center of the compressor impeller 1 is provided with a smooth hole 12, a locking ring groove 10 and an internal thread 11, the rotation direction of the internal thread of the compressor impeller 1 is the same as the rotation direction of a turbine power generation system rotor during working, and the air inlet end of the compressor impeller 1 is provided with a nut 13 for assembling and clamping; the elastic locking 2 ring is arranged in the locking ring grooves of the turbine rotor and the compressor impeller; the composite shaft sleeve 3 in the axial direction is provided with an annular end face 14 matched with an axial gas floating bearing, the composite shaft sleeve 3 in the axial direction is provided with an outer cylindrical face 16 matched with the radial floating bearing, the composite shaft sleeve 3 in the axial direction is made of a ceramic material with self-lubricating property, wear resistance and high temperature resistance, and the composite shaft sleeve 3 in the axial direction is assembled on a fixed shaft sleeve at the end of a gas compressor through an inner hole 15; one end of the compressor fixed shaft sleeve 4 is provided with an inner cylindrical surface 17 assembled with a compressor impeller, one end of the compressor fixed shaft sleeve 4 is provided with an outer cylindrical surface 18 assembled with a composite shaft sleeve, and the other end of the compressor fixed shaft sleeve 4 is provided with an external thread 19 assembled with an internal thread of a motor shaft; the motor shaft 5 consists of a magnetic core 20 and a motor shaft sleeve 21, the magnetic core 20 of the motor shaft 5 is positioned inside the motor shaft sleeve 21, one end of the motor shaft 5 is provided with an internal thread 23 assembled with a compressor end fixing shaft sleeve, and the other end of the motor shaft 5 is provided with an internal thread 22 assembled with a turbine rotor external thread; the radial shaft sleeve 6 is of an annular structure, the outer cylindrical surface of the radial shaft sleeve 6 is matched with the radial gas floating bearing, the radial shaft sleeve 6 is made of a self-lubricating, wear-resistant and high-temperature-resistant ceramic material, and the radial shaft sleeve 6 is assembled on the turbine end fixing shaft sleeve through an inner hole; the turbine fixed shaft sleeve 7 is provided with an internal thread 24 assembled with an external thread of a turbine rotor, and the turbine fixed shaft sleeve 7 is provided with an external cylindrical surface 25 assembled with a radial shaft sleeve; turbine rotor 8 is formed by turbine wheel and pivot welding, there is external screw thread 26 with the internal thread of turbine end fixed axle sleeve and motor shaft internal thread phase assembly on the turbine rotor 8, there is external screw thread 28 with the internal thread of compressor wheel phase assembly on the turbine rotor 8, there is the locking annular 27 with the assembly of elastic locking ring on the turbine rotor 8, turbine rotor 8 one end has and is used for assembling the nut 29 that presss from both sides tightly.
A long-life closed cycle turbine power generation system rotor forming process comprises the following steps:
a. determining structural size parameters of a long-life closed cycle turbine power generation system rotor: according to the size parameters of a turbine, a gas compressor and a motor of the closed-cycle turbine power generation system, determining the structural sizes of rotor components of the turbine power generation system, namely a gas compressor impeller, an elastic locking ring, a shaft radial composite shaft sleeve, a gas compressor fixed shaft sleeve, a motor shaft, a turbine fixed shaft sleeve, a radial shaft sleeve and a turbine rotor;
the diameter of a turbine impeller, the diameter of a compressor impeller and the diameter of a motor shaft of a certain type of closed cycle turbine power generation system in the embodiment are respectively phi 90mm, phi 96mm and phi 38mm, the rotating direction of a rotor of the turbine power generation system in working is dextrorotation, 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 internal thread 11 of the compressor impeller 1 is determined to be M12 multiplied by 1-H7H7-LH, the diameter of an unthreaded hole 12 is phi 12mm, the diameter of an external cylindrical surface 9 is phi 20mm, the diameter of an internal cylindrical surface 15 of a composite shaft sleeve 3 in the axial and radial directions is phi 28mm, the size of the inner cylindrical surface 17 of the fixed compressor shaft sleeve 4 is determined to be phi 20mm, the size of the outer cylindrical surface 18 is phi 28mm, the size of the external thread 19 is M36 multiplied by 1-p6p6-LH, the size of the internal thread 23 of the motor shaft 5 is determined to be 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 6 are phi 28mm and phi 36mm respectively, the size of the internal thread 24 of the fixed turbine shaft sleeve 7 is determined to be M24 multiplied by 1-H7H7-LH, the size of the external thread 26 of the turbine rotor 8 is determined to be M24 multiplied by 1-p6p6-LH, and the size of the external thread 28 is M12 multiplied by 1-p6p6-LH.
b. Determining the screw thread assembling tightening torque between the rotor component parts: determining a thread assembling and screwing torque between parts of a closed cycle turbine power generation system rotor according to the rotating speed, the torque transmission requirement and the dynamic parameters of the closed cycle turbine power generation system rotor;
c. manufacturing long-life closed cycle turbine power generation system rotor component parts: b, processing a compressor impeller, an elastic locking ring, a shaft radial composite shaft sleeve, a compressor fixed shaft sleeve, a motor shaft, a turbine fixed shaft sleeve, a radial shaft sleeve and a turbine rotor according to the structural dimension parameters of the components consisting of the turbine power generation system rotor determined in the step a;
d. assembling a turbine end fixing shaft sleeve and a radial shaft sleeve: assembling the radial shaft sleeve 6 on the outer cylindrical surface 25 of the turbine end fixing shaft sleeve 7, and ensuring that the matching end surfaces are attached tightly to form a turbine end shaft sleeve assembly;
e. assembling a compressor end fixing shaft and a shaft radial composite shaft sleeve: assembling the axial and radial composite shaft sleeve 3 on an outer cylindrical surface 18 of a fixed shaft sleeve 4 of the compressor, and ensuring that a matching end surface is attached tightly to form a shaft sleeve component of the compressor;
f. assembling a motor shaft magnetic core and a motor shaft sleeve: c, adopting a mode of heating the motor shaft sleeve to the processed motor shaft magnetic core 20 and the processed motor shaft sleeve 21 in the step c to realize interference assembly of the motor shaft magnetic core 20 and the motor shaft sleeve 21, and enabling one end of the motor shaft magnetic core to be tightly attached to the inner end face of the shaft sleeve to form a complete motor shaft;
g. assembling a turbine rotor, a turbine end shaft sleeve assembly and a motor shaft: b, according to the assembling and screwing torque determined in the step b, assembling the turbine end shaft sleeve assembly formed in the step d and the motor shaft formed in the step f on the turbine rotor 8 in sequence through screwing, and enabling the end faces to be attached to each other;
h. assembling a compressor end shaft sleeve assembly and a motor shaft: e, enabling the compressor end shaft sleeve assembly formed in the step e to penetrate through a turbine rotor 8, assembling and screwing the compressor end shaft sleeve assembly on a motor shaft through threads according to the assembling and screwing torque determined in the step b, and enabling the end face of the compressor end shaft sleeve 4 to be tightly attached to a magnetic core 20 of the motor shaft 5;
i. assembling the compressor impeller and a compressor end fixed shaft sleeve, a turbine rotor and an elastic locking ring: firstly, the elastic locking ring 2 is arranged in a locking ring groove 27 of the turbine rotor 8, and according to the assembling and screwing torque determined in the step b, the compressor impeller 1 is assembled with the compressor fixed end shaft sleeve 3, the turbine rotor 8 and the elastic locking ring 2 together through the screwing assembly of the compressor impeller 1 and the turbine rotor 8 by threads to form a complete rotor structure.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and should not be taken as limiting the scope of the present invention, which is intended to cover any modifications, equivalents, improvements, etc. within the spirit and scope of the present invention.
Claims (6)
1. The utility model provides a long-life closed cycle turbine power generation system rotor structure which characterized in that: the axial-radial composite axial-flow compressor comprises a compressor impeller (1), an elastic locking ring (2), an axial-radial composite shaft sleeve (3), a compressor fixed shaft sleeve (4), a motor shaft (5), a radial shaft sleeve (6), a turbine fixed shaft sleeve (7) and a turbine rotor (8);
the elastic locking ring (2) is arranged in a locking ring groove of the turbine rotor and the compressor impeller;
the axial-radial composite shaft sleeve (3) is provided with an annular end face (14) matched with the axial gas floating bearing, the axial-radial composite shaft sleeve (3) is provided with an outer cylindrical face (16) matched with the axial gas floating bearing, the axial-radial composite shaft sleeve (3) is made of a ceramic material with self-lubricating property, wear resistance and high temperature resistance, and the axial-radial composite shaft sleeve (3) is assembled on the end fixing shaft sleeve of the gas compressor through an inner hole (15);
one end of the compressor fixed shaft sleeve (4) is provided with an inner cylindrical surface (17) assembled with a compressor impeller, one end of the compressor fixed shaft sleeve (4) is provided with an outer cylindrical surface (18) assembled with the composite shaft sleeve, and the other end of the compressor fixed shaft sleeve (4) is provided with an external thread (19) assembled with an internal thread of a motor shaft;
the motor shaft (5) consists of a magnetic core (20) and a motor shaft sleeve (21), the magnetic core (20) of the motor shaft (5) is positioned inside the motor shaft sleeve (21), one end of the motor shaft (5) is provided with an internal thread (23) assembled with the compressor end fixing shaft sleeve, and the other end of the motor shaft (5) is provided with an internal thread (22) assembled with the external thread of the turbine rotor;
the radial shaft sleeve (6) is of an annular structure, an outer cylindrical surface of the radial shaft sleeve (6) is matched with the radial floating bearing, the radial shaft sleeve (6) is made of a self-lubricating, wear-resistant and high-temperature-resistant ceramic material, and the radial shaft sleeve (6) is assembled on the turbine end fixing shaft sleeve through an inner hole;
the turbine fixed shaft sleeve (7) is provided with an internal thread (24) assembled with an external thread of a turbine rotor, and the turbine fixed shaft sleeve (7) is provided with an external cylindrical surface (25) assembled with a radial shaft sleeve;
turbine rotor (8) are formed by turbine wheel and pivot welding, have external screw thread (26) of assembling with turbine end fixed axle sleeve internal thread and motor shaft internal thread on turbine rotor (8), have external screw thread (28) of assembling with compressor wheel internal thread on turbine rotor (8), have locking ring groove (27) with elastic locking ring (2) assembly on turbine rotor (8), turbine rotor (8) one end has and is used for assembling tight nut (29).
2. The long life closed cycle turbine power generation system rotor structure of claim 1, wherein: the compressor impeller is characterized in that an outer cylindrical surface (9) assembled with a compressor end fixing shaft sleeve is arranged on the compressor impeller (1), a blind hole is formed in the center of the compressor impeller (1), a smooth hole (12), a locking ring groove (10) and an internal thread (11) are formed in the central blind hole of the compressor impeller (1), the internal thread of the compressor impeller (1) rotates in the same direction as the rotation direction of a turbine power generation system rotor during working, and a nut (13) used for assembling and clamping is arranged at the air inlet end of the compressor impeller (1).
3. A molding process of a long-life closed cycle turbine power generation system rotor for the long-life closed cycle turbine power generation system rotor structure according to claim 1, characterized in that: the method comprises the following steps:
a. determining structural size parameters of a rotor of the long-life closed cycle turbine power generation system;
b. determining the screw thread assembling and screwing torque between the rotor component parts;
c. manufacturing long-life closed cycle turbine power generation system rotor component parts;
d. assembling a turbine end fixing shaft sleeve and a radial shaft sleeve: assembling the radial shaft sleeve on the outer cylindrical surface of the turbine end fixed shaft sleeve, and ensuring that the matching end surface is attached tightly to form a turbine end shaft sleeve assembly;
e. assembling a compressor end fixing shaft and a shaft radial composite shaft sleeve: assembling the axial and radial composite shaft sleeve on the outer cylindrical surface of the fixed shaft sleeve of the compressor end, and ensuring that the matching end surface is attached tightly to form a shaft sleeve component of the compressor end;
f. assembling a motor shaft magnetic core and a motor shaft sleeve;
g. assembling the turbine rotor with the turbine end shaft sleeve assembly and the motor shaft;
h. assembling a compressor end shaft sleeve component and a motor shaft;
i. and assembling the compressor impeller with a compressor fixed end shaft sleeve, a turbine rotor and an elastic locking ring.
4. A process of forming a long life closed cycle turbine power generation system rotor as claimed in claim 3, wherein: and g, according to the assembling and screwing torque determined in the step b, screwing through threads, and sequentially assembling the turbine end shaft sleeve assembly formed in the step d and the motor shaft formed in the step f on the turbine rotor so that the end faces are attached to each other.
5. A process of forming a long life closed cycle turbine power generation system rotor as claimed in claim 3, wherein: and h, enabling the compressor end shaft sleeve assembly formed in the step e to penetrate through a turbine rotor, assembling and screwing the compressor end shaft sleeve assembly on a motor shaft through threads according to the assembling and screwing torque determined in the step b, and enabling the end face of the compressor end shaft sleeve to be attached to a magnetic core of the motor shaft.
6. The process of forming a long life closed cycle turbine power generation system rotor as recited in claim 3, wherein: in step i, firstly, the elastic locking ring is installed in the turbine rotor locking ring groove, according to the assembling and tightening torque determined in step b, the compressor impeller is assembled with the compressor fixed end shaft sleeve, the turbine rotor and the elastic locking ring together through screwing and assembling of the compressor impeller and the turbine rotor, and a complete rotor structure is formed.
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| CN201910647986.4A CN110344891B (en) | 2019-07-18 | 2019-07-18 | Rotor structure and process of long-life closed circulation turbine power generation system |
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| 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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| US9664050B2 (en) * | 2013-10-25 | 2017-05-30 | Ecomotors, Inc. | Bearings for a turbomachine having an electric motor |
| FR3034460B1 (en) * | 2015-04-01 | 2019-07-19 | Liebherr-Aerospace Toulouse Sas | ROTOR AND ROTOR TURBOMACHINE ASSEMBLY AT VERY HIGH SPEEDS INCLUDING SUCH A ROTOR ASSEMBLY |
| CN207568669U (en) * | 2017-12-07 | 2018-07-03 | 刘强 | Pressure energy reclaimer and pipeline pressure energy recovery system |
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| 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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