CN115434928A - High-speed centrifugal air compressor and expander integrated device - Google Patents
High-speed centrifugal air compressor and expander integrated device Download PDFInfo
- Publication number
- CN115434928A CN115434928A CN202211172347.5A CN202211172347A CN115434928A CN 115434928 A CN115434928 A CN 115434928A CN 202211172347 A CN202211172347 A CN 202211172347A CN 115434928 A CN115434928 A CN 115434928A
- Authority
- CN
- China
- Prior art keywords
- expansion
- compression
- rotor
- volute
- preheating
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D17/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
- F04D17/08—Centrifugal pumps
- F04D17/10—Centrifugal pumps for compressing or evacuating
-
- 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
- F01D11/00—Preventing or minimising internal leakage of working-fluid, e.g. between stages
-
- 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
- F01D11/00—Preventing or minimising internal leakage of working-fluid, e.g. between stages
- F01D11/003—Preventing or minimising internal leakage of working-fluid, e.g. between stages by packing rings; Mechanical seals
-
- 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
- F01D25/08—Cooling; Heating; Heat-insulation
- F01D25/10—Heating, e.g. warming-up before starting
-
- 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
- F01D25/24—Casings; Casing parts, e.g. diaphragms, casing fastenings
-
- 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
- F01D9/00—Stators
-
- 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
- F04D25/06—Units comprising pumps and their driving means the pump being electrically driven
- F04D25/0606—Units comprising pumps and their driving means the pump being electrically driven the electric motor being specially adapted for integration in the pump
-
- 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
- F04D29/08—Sealings
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
A high-speed centrifugal air compressor and expander integrated device comprises a motor shell, a stator and a rotor, wherein a compression end bearing seat and an expansion end bearing seat for supporting the rotor are respectively installed on the inner sides of two ends of the motor shell, a compression end sealing structure is arranged between a compression end diffuser and the rotor and used for preventing gas in a compression cavity from leaking into a motor cavity to reduce compression efficiency, and a compression end cooling system is arranged in the compression volute and the motor shell and used for cooling and radiating a thrust bearing, a compression end radial bearing, the stator, the rotor and the expansion end radial bearing to prevent heat accumulation; an expansion end sealing structure is arranged between the expansion end guider and the rotor and used for preventing gas in an expansion cavity from leaking into a motor cavity to corrode the stator and the rotor, and an expansion end preheating system is arranged in the expansion volute and the motor shell and used for preheating the expansion volute and the expansion volute so as to reduce the temperature difference between the expansion end and high-temperature gas discharged by a fuel cell stack and reduce the amount of condensation water.
Description
The technical field is as follows:
the invention relates to a high-speed centrifugal air compressor and expander integrated device.
The background art comprises the following steps:
at present, the development of new energy fuel cell automobiles is considered as an important link of traffic energy power conversion, in order to ensure the normal work of a fuel cell engine, the engine generally needs auxiliary systems such as a hydrogen supply subsystem, an air supply subsystem and a circulating water cooling management subsystem, and a large number of researches show that the high-pressure and large-flow air supply has an obvious effect of improving the power output of the existing fuel cell engine. Therefore, before air enters the engine, the air is pressurized, and a centrifugal air compressor is an energy conversion device for achieving the purpose and is one of important parts of an air supply system of the fuel cell engine.
The applicant filed a patent application with publication number CN114893419A on 23/5/2022 entitled a fuel cell single-stage high-speed centrifugal air compressor and expander integrated system, which discloses a structural form of integrating an air compressor and an expander, wherein, when the rotor works specifically, for a compression end, on one hand, gas in a compression cavity is easy to leak into a motor cavity to reduce compression efficiency, and due to high-speed rotation of the rotor during working, a common contact type sealing ring is easy to wear, heat is serious, a gap is increased, and sealing failure occurs; on the other hand, a large amount of heat is generated in the compression end and the motor, and if the heat is not discharged in time to form heat accumulation, the situation that the motor is forced to stop due to overhigh internal temperature can occur.
For the expansion end, on one hand, gas in the expansion cavity is easy to leak to the cavity of the motor, so that the stator and the rotor of the motor are corroded, the service life of the motor is influenced, and because the rotor rotates at a high speed during working, a common contact type sealing ring is easy to abrade, the heating is serious, the gap is increased, and the sealing failure is caused; on the other hand, high-temperature gas discharged by the fuel cell stack enters the expander to push the expansion impeller to rotate, the expansion impeller is used for recovering the energy of the gas discharged by the fuel cell stack and providing power for the rotor, the high-temperature gas discharged by the fuel cell stack contains certain water vapor and can be condensed into water when the high-temperature gas enters the expander after the high-temperature gas is cooled, the larger the temperature difference is, the larger the condensed water quantity is, the normal work of the expander is influenced, the water flooding of the expander is caused, and the problem cannot be solved by a good method at present.
For the rotor, the structural form of the rotor plays a role in lifting the rotating speed. In the traditional rotor, magnetic steel is arranged inside the traditional rotor, and the magnetic steel is coated outside the magnetic steel through a high-temperature resistant non-magnetic material, but the existing rotor mounting structure is complex, the rotor in the high-speed centrifugal compressor is supported through a radial air bearing, the outer surface of the rotor is in contact with the air bearing, and the rotor is easily abraded after a long time, so that the rotation precision is influenced; when the rotor is high in rotating speed for a long time, heat can be generated outside the rotor, the temperature of the rotor is increased, and when the temperature of the rotor is too high, the rotor is easy to deform, and the service life of the rotor is influenced. In addition, the existing rotor has poor bilateral symmetry, different weights on the left side and the right side and poor balance, and when the rotor rotates at high speed under the condition of hundreds of thousands of rotating speeds, the difference between the left side and the right side is amplified, the stability of the rotor is influenced, and the improvement of the rotating speed of the rotor is also influenced to a certain extent.
In summary, the sealing and cooling of the compression end and the sealing of the expansion end, the water condensation and the rotor have become technical problems to be solved urgently in the industry.
The invention content is as follows:
in order to make up for the defects of the prior art, the invention provides an integrated device of a high-speed centrifugal air compressor and an expander, which solves the problem that the compression efficiency is reduced due to the fact that gas in a compression cavity leaks into a motor cavity, solves the problem that heat accumulation is formed when the heat in a compression end and the interior of a motor is not discharged in time, solves the problem that the gas in an expansion cavity leaks into the motor cavity to corrode a stator and a rotor, and solves the problem that high-temperature gas discharged by a fuel cell stack is condensed into water when meeting cold after entering the expander.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a high-speed centrifugal air compressor and expander integrated device comprises a motor shell, a stator and a rotor, wherein a compression end bearing seat and an expansion end bearing seat for supporting the rotor are respectively installed on the inner sides of two ends of the motor shell, a compression end diffuser is installed on the outer side of the compression end bearing seat, the rotor penetrates through the compression end diffuser and is provided with a compression impeller, a compression volute connected with the motor shell is arranged on the outer side of the compression impeller, a compression volute is arranged in the compression volute, a compression end air inlet and a compression end air outlet are formed in the compression volute, a thrust disc and a thrust bearing are arranged between the compression end bearing seat and the compression end diffuser, and a compression end radial bearing is arranged between the compression end bearing seat and the rotor;
an expansion end guider is arranged on the outer side of the expansion end bearing seat, the rotor penetrates through the expansion end guider and is provided with an expansion impeller, an expansion volute connected with the motor shell is arranged on the outer side of the expansion impeller, an expansion volute is arranged inside the expansion volute, an expansion end air inlet and an expansion end air outlet which are communicated with the expansion volute are formed in the expansion volute, and an expansion end radial bearing is arranged between the expansion end bearing seat and the rotor;
a compression end sealing structure is arranged between the compression end diffuser and the rotor and is used for avoiding the reduction of compression efficiency caused by the leakage of gas in a compression cavity into a motor cavity, and a compression end cooling system is arranged in the compression volute and the motor shell and is used for cooling and radiating the thrust bearing, the compression end radial bearing, the stator, the rotor and the expansion end radial bearing to avoid heat accumulation;
an expansion end sealing structure is arranged between the expansion end guider and the rotor and used for preventing wet gas in an expansion cavity from leaking into a motor cavity to corrode the stator and the rotor and damage an air bearing, and an expansion end preheating system is arranged in the expansion volute and the motor shell and used for preheating the expansion volute and the expansion volute so as to reduce the temperature difference between the expansion end and high-temperature gas discharged by a fuel cell stack, reduce the amount of condensation water and reduce the impact damage of liquid drops to an expansion impeller.
The compression end sealing structure comprises a compression end sealing sleeve ring arranged on a rotor between the compression impeller and the thrust disc, a compression end sealing groove matched with the compression end sealing sleeve ring is arranged on the inner hole wall of the compression end diffuser, and the outer edge of the compression end sealing sleeve ring is inserted in the compression end sealing groove and is in clearance fit with the compression end diffuser to form a clearance sealing structure.
The outer end face of the compression end diffuser is connected with a compression end sealing cover plate through a screw, a compression end sealing groove is formed between the compression end sealing cover plate and the compression end diffuser, the compression end sealing sleeve ring compresses the thrust disc on the stepped end face of one end of the rotor, the compression impeller compresses the compression end sealing sleeve ring on the end face of the thrust disc, and the outer end of the compression impeller is fixedly compressed through a compression nut which is installed on the rotor through threads.
The compression end cooling system comprises an air inlet nozzle and a shell air inlet channel which are arranged on a motor shell, a bearing seat air inlet channel is arranged in a compression end bearing seat, a diffuser air inlet channel is arranged in a compression end diffuser, and a bearing seat exhaust channel communicated with the diffuser air inlet channel is also arranged in the compression end bearing seat; gas enters from the air inlet nozzle through a shell gas inlet channel and a bearing seat gas inlet channel, one part of gas enters the interior of a motor shell through a gap between a thrust plate and a compression end bearing seat and a gap between a compression end bearing seat and a rotor, and cools a thrust bearing and a compression end radial bearing on the inner side of the thrust plate, the other part of gas enters the interior of the motor shell through a gap between the thrust plate and a compression end diffuser, a diffuser gas inlet channel and a bearing seat gas outlet channel, and cools the thrust bearing on the outer side of the thrust plate.
The expansion end sealing structure comprises an expansion end sealing lantern ring arranged on the rotor between the expansion impeller and the expansion end bearing seat, an expansion end sealing groove matched with the expansion end sealing lantern ring is arranged on the inner hole wall of the expansion end guider, and the outer edge of the expansion end sealing lantern ring is inserted into the expansion end sealing groove and is in clearance fit with the expansion end guider to form a clearance sealing structure.
The outer end face of the expansion end guider is connected with an expansion end sealing cover plate through a screw, an expansion end sealing groove is formed between the expansion end sealing cover plate and the expansion end guider, the expansion end sealing lantern ring is pressed on the stepped end face of the rotor by the expansion impeller, and the outer end of the expansion impeller is fixedly pressed by a compression nut which is installed on the rotor through threads.
The expansion end preheating system comprises a guider exhaust channel arranged in an expansion end guider, a first preheating cavity is arranged between the motor shell and the expansion volute, a second preheating cavity is arranged in the side wall of the expansion volute, a preheating air inlet channel communicated with the first preheating cavity and the second preheating cavity is arranged in the side wall of the expansion volute, and a preheating exhaust channel communicated with the second preheating cavity is arranged in the side wall of the expansion volute; the gas in the motor shell enters the first preheating cavity through the guider exhaust passage and is used for primary preheating of the expansion volute, the gas in the first preheating cavity enters the second preheating cavity through the preheating gas inlet passage and is used for secondary preheating of the expansion volute, and the gas in the second preheating cavity is discharged outwards from the preheating exhaust passage.
The second preheating cavity is annularly arranged in the side wall of the expansion volute, the second preheating cavity is arranged in the side wall of the expansion volute and close to the expansion volute, the preheating air inlet channel is arranged in the side wall of the expansion volute and close to the expansion end air inlet, the preheating air inlet channel and the preheating exhaust channel are arranged on two opposite sides of the second preheating cavity, and the preheating exhaust channel is communicated with the expansion end air outlet.
The rotor comprises a middle sleeve, magnetic steel is installed in the middle sleeve, mandrels are respectively arranged at two ends of the magnetic steel, a pressing shaft sleeve is arranged on the outer side of one end, close to the magnetic steel, of the mandrel and is fixedly connected with the middle sleeve, the pressing shaft sleeve is used for pressing and fixing the mandrel and the magnetic steel, the pressing shaft sleeve and the middle sleeve are made of high-temperature-resistant non-magnetic materials, and a wear-resistant coating is arranged on the outer surface of the pressing shaft sleeve.
The utility model discloses a steel core, including the magnet steel, the dabber at magnet steel both ends and the axle sleeve symmetry that compresses tightly, the surface of dabber is equipped with the shaft shoulder, and the inboard that compresses tightly the axle sleeve is equipped with keeps off the platform, and the dabber with compress tightly interference fit pressure equipment between the axle sleeve and be connected, compress tightly the axle sleeve and insert the dress inside the middle sleeve, compress tightly interference fit pressure equipment between axle sleeve and the middle sleeve and be connected, and junction outward flange welded fastening, the dabber flushes and cooperates with magnet steel end face contact with the one end terminal surface that compresses tightly the axle sleeve and is close to the magnet steel, the one end surface that the magnet steel was kept away from to the dabber is equipped with the ring channel that a plurality of is used for lightening weight.
By adopting the scheme, the invention has the following advantages:
by adding the compression end sealing sleeve ring, the compression end sealing sleeve ring rotates at a high speed along with the rotor, and the compression end sealing groove matched with the compression end sealing sleeve ring is arranged on the inner hole wall of the compression end diffuser, so that a labyrinth type gap sealing structure is formed, gas in a compression cavity can be prevented from leaking into a motor cavity, and the compression ratio and the compression efficiency are improved;
the bearing seat air inlet channel is arranged in the compression end bearing seat, the diffuser air inlet channel is arranged in the compression end diffuser, the bearing seat air outlet channel communicated with the diffuser air inlet channel is also arranged in the compression end bearing seat, air enters from the air inlet nozzle through the shell air inlet channel and the bearing seat air inlet channel, a part of air enters the motor shell through the gap between the thrust disc and the compression end bearing seat and the gap between the compression end bearing seat and the rotor, the thrust bearing and the compression end radial bearing on the inner side of the thrust disc are cooled, the other part of air enters the motor shell through the gap between the thrust disc and the compression end diffuser, the diffuser air inlet channel and the bearing seat air outlet channel, the thrust bearing on the outer side of the thrust disc is cooled, the heat generated during the working of the stator and the rotor is taken away by the air in the motor shell, the air enters the expansion end guider through the gap between the expansion end bearing seat and the rotor, the expansion end radial bearing is cooled, the heat in the compression end and the motor is taken away by the air, the cooling efficiency is high, the cooling effect is good, the heat in the compression end and the heat in the motor can be discharged in time, and cannot be accumulated, and the situation that the internal temperature is avoided;
by adding the expansion end sealing lantern ring, the expansion end sealing lantern ring rotates at a high speed along with the rotor, and the expansion end sealing groove matched with the expansion end sealing lantern ring is arranged on the inner hole wall of the expansion end guider to form a labyrinth type gap sealing structure, gas in the expansion cavity can be prevented from leaking into the cavity of the motor, the stator and the rotor are prevented from being corroded, and the service life of the motor is ensured;
the first preheating cavity is arranged between the motor shell and the expansion volute, primary preheating can be carried out on the expansion volute, the second preheating cavity is arranged in the side wall of the expansion volute, secondary preheating is carried out on the expansion volute, gas with certain temperature enters the first preheating cavity and the second preheating cavity before high-temperature gas discharged by the fuel cell stack enters the expander, and the expansion volute are fully preheated, so that the temperature difference between the expander and the high-temperature gas discharged by the fuel cell stack is reduced, the amount of condensate is greatly reduced, the water flooding of the expander is avoided, and the performance of the expander is ensured;
the central shafts on the two sides are respectively pressed and fixed with the magnetic steel through the pressing shaft sleeves on the two sides, and then the pressing shaft sleeves are fixedly connected with the middle sleeve, so that the assembly process is simplified, the assembly efficiency is improved, the outer surfaces of the pressing shaft sleeves are provided with wear-resistant coatings which are contacted with the radial air bearing, the wear resistance is greatly improved, the abrasion of the rotor is avoided, the rotation precision is improved, the pressing shaft sleeves and the middle sleeve are made of high-temperature-resistant non-magnetic materials, the situations of external heating and temperature rise of the rotor are avoided, and the service life of the rotor is ensured; the rotor bilateral symmetry sets up, and weight is the same, and the equilibrium is good, and stability is good during high-speed rotation, is favorable to the promotion of rotational speed.
Description of the drawings:
fig. 1 is a schematic sectional structure of the present invention.
Fig. 2 is a schematic cross-sectional structural view of a compression end seal structure of the present invention.
Fig. 3 is a schematic cross-sectional view of an expansion end seal structure of the present invention.
Fig. 4 is a schematic sectional view showing a rotor according to the present invention.
In the figure, 1, a motor shell, 2, a stator, 3, a rotor, 4, a compression end bearing seat, 5, an expansion end bearing seat, 6, a compression end diffuser, 7, a compression impeller, 8, a compression volute, 9, a compression volute, 10, a compression end air inlet, 11, a compression end air outlet, 12, a thrust disk, 13, a thrust bearing, 14, a compression end radial bearing, 15, an expansion end guider, 16, an expansion impeller, 17, an expansion volute, 18, an expansion volute, 19, an expansion end air inlet, 20, an expansion end air outlet, 21, an expansion end radial bearing, 22, an air inlet nozzle, 23 and a shell air inlet channel, 24, a bearing seat air inlet channel, 25, a diffuser air inlet channel, 26, a bearing seat air outlet channel, 27, a guider air outlet channel, 28, a first preheating cavity, 29, a second preheating cavity, 30, a preheating air inlet channel, 31, a preheating air outlet channel, 32, a compression end sealing sleeve ring, 33, a compression end sealing groove, 34, a compression end sealing cover plate, 35, a compression nut, 36, an expansion end sealing sleeve ring, 37, an expansion end sealing groove, 38, an expansion end sealing cover plate, 39, a middle sleeve, 40, magnetic steel, 41, a mandrel, 42, a compression sleeve, 43 and an annular groove.
The specific implementation mode is as follows:
in order to clearly explain the technical features of the present invention, the following detailed description of the present invention is provided with reference to the accompanying drawings.
As shown in fig. 1-4, a high-speed centrifugal air compressor and expander integrated device comprises a motor housing 1, a stator 2 and a rotor 3, wherein a compression end bearing seat 4 and an expansion end bearing seat 5 for supporting the rotor 3 are respectively installed on the inner sides of two ends of the motor housing 1, a compression end diffuser 6 is installed on the outer side of the compression end bearing seat 4, the rotor 3 penetrates through the compression end diffuser 6 and is provided with a compression impeller 7, a compression volute 8 connected with the motor housing 1 is arranged on the outer side of the compression impeller 7, a compression volute 9 is arranged in the compression volute 8, a compression end air inlet 10 and a compression end air outlet 11 are arranged on the compression volute 8, a thrust disc 12 and a thrust bearing 13 are arranged between the compression end bearing seat 4 and the compression end diffuser 6, and a compression end radial bearing 14 is arranged between the compression end bearing seat 4 and the rotor 3;
an expansion end guide 15 is arranged on the outer side of the expansion end bearing seat 5, an expansion impeller 16 is arranged on the rotor 3 penetrating through the expansion end guide 15, an expansion volute 17 connected with the motor shell 1 is arranged on the outer side of the expansion impeller 16, an expansion volute channel 18 is arranged inside the expansion volute 17, an expansion end air inlet 19 and an expansion end air outlet 20 communicated with the expansion volute channel 18 are arranged on the expansion volute 17, and an expansion end radial bearing 21 is arranged between the expansion end bearing seat 5 and the rotor 3;
a compression end sealing structure is arranged between the compression end diffuser 6 and the rotor 3 and is used for avoiding the reduction of compression efficiency caused by the leakage of gas in a compression cavity to a motor cavity, and a compression end cooling system is arranged in the compression volute 8 and the motor shell 1 and is used for cooling and radiating the thrust bearing 13, the compression end radial bearing 14, the stator 2, the rotor 3 and the expansion end radial bearing 21 to avoid heat accumulation;
an expansion end sealing structure is arranged between the expansion end guider 15 and the rotor 3 and used for preventing wet gas in an expansion cavity from leaking into a motor cavity to corrode the stator and the rotor and damage an air bearing, and expansion end preheating systems are arranged in the expansion volute 17 and the motor shell 1 and used for preheating the expansion volute 17 and the expansion volute 18 so as to reduce the temperature difference between the expansion end and high-temperature gas discharged by a fuel cell stack, reduce the amount of condensation water and reduce the impact damage of liquid drops to an expansion impeller.
The compression end sealing structure comprises a compression end sealing lantern ring 32 arranged on the rotor 3 between the compression impeller 7 and the thrust disc 12, a compression end sealing groove 33 matched with the compression end sealing lantern ring 32 is arranged on the inner hole wall of the compression end diffuser 6, and the outer edge of the compression end sealing lantern ring 32 is inserted in the compression end sealing groove 33 and is in clearance fit with the compression end diffuser 6 to form a clearance sealing structure.
The outer terminal surface of compression end diffuser 6 has compression end seal cover plate 34 through the screw connection, forms compression end seal groove 33 between compression end seal cover plate 34 and the compression end diffuser 6, and compression end seal cover plate 34 can be dismantled, makes things convenient for packing into of compression end seal lantern ring 32, compression end seal lantern ring 32 compresses tightly thrust disc 12 on the ladder terminal surface of rotor 3 one end, and compression impeller 7 compresses tightly compression end seal lantern ring 32 on thrust disc 12 terminal surface, and compression impeller 7's outer end compresses tightly fixedly through gland nut 35 of threaded mounting on rotor 3. During operation, rotor 3 drives compression impeller 7 and rotates at a high speed, air enters from compression end air inlet 10, after pressurization is carried out in compression volute 9, discharge from compression end gas outlet 11, to fuel cell delivery high-pressure air, compression end sealing sleeve ring 32 is rotatory along with rotor 3 at a high speed, the outward flange cartridge of compression end sealing sleeve ring 32 forms labyrinth clearance seal structure with compression end diffuser 6 and the sealed apron 34 clearance fit of compression end in compression end seal groove 33, air in the compression chamber is difficult to get into the motor intracavity portion through the clearance, can prevent that the gas in the compression chamber from leaking to the motor intracavity, compression ratio and compression efficiency have been promoted.
The compression end cooling system comprises an air inlet nozzle 22 and a shell air inlet channel 23 which are arranged on the motor shell 1, a bearing seat air inlet channel 24 is arranged in the compression end bearing seat 4, a diffuser air inlet channel 25 is arranged in the compression end diffuser 6, and a bearing seat exhaust channel 26 communicated with the diffuser air inlet channel 25 is also arranged in the compression end bearing seat 4; gas enters from the gas inlet nozzle 22 through the shell gas inlet channel 23 and the bearing seat gas inlet channel 24, one part of gas enters the motor shell 1 through the gap between the thrust disc 12 and the compression end bearing seat 4 and the gap between the compression end bearing seat 4 and the rotor 3 to cool the thrust bearing 13 and the compression end radial bearing 14 on the inner side of the thrust disc 12, the other part of gas enters the motor shell 1 through the gap between the thrust disc 12 and the compression end diffuser 6, the diffuser gas inlet channel 25 and the bearing seat gas outlet channel 26 to cool the thrust bearing 13 on the outer side of the thrust disc 12, the gas in the motor shell 1 takes away heat generated when the stator 2 and the rotor 3 work, the gas enters the expansion end guider 15 through the gap between the expansion end bearing seat 5 and the rotor 3 to cool the expansion end radial bearing 21, and the gas takes away the heat on the compression end and the inside of the motor.
The expansion end sealing structure comprises an expansion end sealing lantern ring 36 arranged on the rotor 3 between the expansion impeller 16 and the expansion end bearing seat 5, an expansion end sealing groove 37 matched with the expansion end sealing lantern ring 36 is arranged on the inner hole wall of the expansion end guider 15, and the outer edge of the expansion end sealing lantern ring 36 is inserted into the expansion end sealing groove 37 and is in clearance fit with the expansion end guider 15 to form a clearance sealing structure.
The outer end face of the expansion end guider 15 is connected with an expansion end sealing cover plate 38 through a screw, an expansion end sealing groove 37 is formed between the expansion end sealing cover plate 38 and the expansion end guider 15, the expansion end sealing cover plate 38 can be detached to facilitate the installation of an expansion end sealing lantern ring 36, the expansion impeller 16 compresses the expansion end sealing lantern ring 36 on the stepped end face of the rotor 3, and the outer end of the expansion impeller 16 is fixedly compressed through a compression nut 35 which is installed on the rotor 3 through threads. During operation, high-pressure gas discharged by a fuel cell stack enters the expansion machine from the expansion end gas inlet 19, the expansion impeller 16 is driven to rotate by the expansion worm way 18, the expansion impeller 16 is used for recovering the gas energy discharged by the fuel cell stack and provides assistance for the rotor 3, the gas is finally discharged from the expansion end gas outlet 20, the outer edge of the expansion end sealing lantern ring 36 is inserted into the expansion end sealing groove 37 to form a labyrinth gap sealing structure in clearance fit with the expansion end guider 15 and the expansion end sealing cover plate 38, the gas in the expansion cavity hardly enters the motor cavity through a gap, the gas in the expansion cavity can be prevented from leaking into the motor cavity, the corrosion to the stator 2 and the rotor 3 is avoided, and the service life of the motor is ensured.
The expansion end preheating system comprises a guider exhaust channel 27 arranged in an expansion end guider 15, a first preheating cavity 28 is arranged between the motor shell 1 and the expansion volute 17, a second preheating cavity 29 is arranged in the side wall of the expansion volute 17, a preheating air inlet channel 30 communicated with the first preheating cavity 28 and the second preheating cavity 29 is arranged in the side wall of the expansion volute 17, and a preheating exhaust channel 31 communicated with the second preheating cavity 29 is arranged in the side wall of the expansion volute 17; the gas guider exhaust channel 27 in the motor shell enters the first preheating cavity 28 for primary preheating of the expansion volute 17, the gas in the first preheating cavity 28 enters the second preheating cavity 29 through the preheating inlet channel 30 for secondary preheating of the expansion volute 17, and the gas in the second preheating cavity 29 is discharged outwards from the preheating exhaust channel 31.
The second preheating cavity 29 is annularly arranged in the side wall of the expansion volute 17, so that the space of the expansion volute 17 can be fully utilized, the preheating area is increased, and the preheating effect is enhanced.
The second preheating cavity 29 is arranged in the side wall of the expansion volute 17 and close to the expansion volute 18, high-temperature gas exhausted by the fuel cell stack enters from the expansion end gas inlet 19 and then directly enters the expansion volute 18, and the second preheating cavity 29 can enhance the preheating effect on the expansion volute 18 and reduce the temperature difference as much as possible.
The preheating inlet passage 30 is arranged in the side wall of the expansion volute 17 and close to the expansion end inlet 19, and can preheat the expansion end inlet 19.
The preheating exhaust passage 31 is communicated with the expansion end gas outlet 20, and can directly exhaust the gas in the second preheating cavity 29 into the expansion end gas outlet 20.
The preheating inlet channel 30 and the preheating outlet channel 31 are disposed at two opposite sides of the second preheating chamber 29, so that the residence time of the gas in the second preheating chamber 29 can be prolonged, sufficient heat exchange can be performed, and the preheating effect can be enhanced.
The rotor 3 comprises a middle sleeve 39, a magnetic steel 40 is installed in the middle sleeve 39, two ends of the magnetic steel 40 are respectively provided with a mandrel 41, the outer side of one end, close to the magnetic steel 40, of the mandrel 41 is provided with a pressing shaft sleeve 42, the pressing shaft sleeve 42 is fixedly connected with the middle sleeve 39, the pressing shaft sleeve 42 is used for pressing and fixing the mandrel 41 and the magnetic steel 40, the assembling process is simplified, the assembling efficiency is improved, the pressing shaft sleeve 42 and the middle sleeve 39 are made of high-temperature-resistant non-magnetic materials, the situations of heating outside the rotor and temperature rise of the rotor are avoided, and the service life of the rotor is ensured; the outer surface of the compressing shaft sleeve 42 is provided with a wear-resistant coating, and the wear-resistant coating is in contact with the radial air bearing, so that the wear resistance is greatly improved.
The magnetic steel 40 is arranged in the middle of the inner portion of the middle sleeve 39, the core shafts and the compression shaft sleeves at two ends of the magnetic steel are symmetrically arranged, the weights of two sides are the same, the balance performance is good, the stability is good during high-speed rotation, and the rotation speed is favorably improved.
The outer surface of the mandrel 41 is provided with a shoulder, the inner side of the pressing shaft sleeve 42 is provided with a blocking platform, and the mandrel 41 and the pressing shaft sleeve 42 are in interference fit press-fit connection.
The compressing shaft sleeve 42 is inserted into the middle sleeve 39, the compressing shaft sleeve 42 and the middle sleeve 39 are in interference fit press-fitting connection, and the outer edge of the connection part is welded and fixed to increase the connection strength.
The end faces of the mandrel 41 and the pressing shaft sleeve 42 close to the magnetic steel 40 are flush and are in contact fit with the end faces of the magnetic steel, so that the whole structure is more compact, and when the mandrel is impacted by external force, the contact area between the surface of the mandrel and the surface of the magnetic steel is large, and the magnetic steel can be prevented from being stressed and broken.
The outer surface of one end of the mandrel 41, which is far away from the magnetic steel 40, is provided with a plurality of annular grooves 43 for reducing weight, so that the whole weight is reduced, and the rotation speed is promoted.
The material of the compressing shaft sleeve 42 and the intermediate sleeve 39 comprises nickel-based high-temperature alloy, and the nickel-based high-temperature alloy is high in strength and good in oxidation resistance and fuel gas corrosion resistance in a range of 650-1000 ℃ by taking nickel as a base body (the content is generally more than 50%). Specifically, the GH4145 alloy can be adopted, belongs to a high-temperature-resistant non-magnetic material, has good corrosion resistance and oxidation resistance, has high strength below 800 ℃, has good relaxation resistance below 540 ℃, and also has good forming performance and welding performance.
The material of the mandrel 41 comprises 9Cr18, 9Cr18Mo or 9Cr18MoV stainless steel, and has high hardness, good corrosion resistance and strong toughness.
The wear-resistant coating comprises a titanium nitride coating, and is high in hardness, good in wear resistance, high-temperature resistant, good in stability when in contact with the radial air bearing and long in service life.
The working principle is as follows:
before high-temperature gas exhausted by a fuel cell stack enters an expander, the gas enters from an air inlet nozzle 22 through a shell air inlet channel 23 and a bearing seat air inlet channel 24, a part of the gas enters into a motor shell 1 through a gap between a thrust disc 12 and a compression end bearing seat 4 and a gap between a compression end bearing seat 4 and a rotor 3, a thrust bearing 13 and a compression end radial bearing 14 on the inner side of the thrust disc 12 are cooled, the other part of the gas enters into the motor shell 1 through a gap between the thrust disc 12 and a compression end diffuser 6, a diffuser air inlet channel 25 and a bearing seat exhaust channel 26, the thrust bearing 13 on the outer side of the thrust disc 12 is cooled, the gas in the motor shell 1 takes away heat generated when the stator 2 and the rotor 3 work, the gas enters into an expansion end guider 15 through a gap between an expansion end bearing seat 5 and the rotor 3, the expansion end radial bearing 21 is cooled, and the gas brings out the heat in the compression end and the motor, so that the cooling function of the compression end and the motor is realized; and the gas temperature rises, the gas enters the first preheating cavity 28 through the guider exhaust passage 27 for primary preheating of the expansion volute 17, the gas in the first preheating cavity 28 enters the second preheating cavity 29 through the preheating inlet passage 30 for secondary preheating of the expansion volute 17 to reduce the temperature difference between the expander and the high-temperature gas discharged by the fuel cell stack, after the preheating is completed, the high-temperature gas discharged by the fuel cell stack enters the expander again, the gas can be continuously supplied into the first preheating cavity 28 and the second preheating cavity 29 for preheating, a certain temperature is always kept to reduce the temperature difference, the purpose of reducing the water condensation is achieved, and the gas in the second preheating cavity 29 is discharged from the preheating exhaust passage 31 to the expansion end air outlet 20 and is discharged outwards.
The above-described embodiments should not be construed as limiting the scope of the invention, and any alternative modifications or alterations to the embodiments of the present invention will be apparent to those skilled in the art.
The present invention is not described in detail, but is known to those skilled in the art.
Claims (10)
1. The utility model provides a high-speed centrifugal air compressor machine and expander integrated device which characterized in that: the motor comprises a motor shell, a stator and a rotor, wherein a compression end bearing seat and an expansion end bearing seat for supporting the rotor are respectively installed on the inner sides of two ends of the motor shell, a compression end diffuser is installed on the outer side of the compression end bearing seat, the rotor penetrates through the compression end diffuser and is provided with a compression impeller, a compression volute connected with the motor shell is arranged on the outer side of the compression impeller, a compression volute is arranged in the compression volute, a compression end air inlet and a compression end air outlet are formed in the compression volute, a thrust disc and a thrust bearing are arranged between the compression end bearing seat and the compression end diffuser, and a compression end radial bearing is arranged between the compression end bearing seat and the rotor;
an expansion end guider is arranged on the outer side of the expansion end bearing seat, the rotor penetrates through the expansion end guider and is provided with an expansion impeller, an expansion volute connected with the motor shell is arranged on the outer side of the expansion impeller, an expansion volute is arranged inside the expansion volute, an expansion end air inlet and an expansion end air outlet which are communicated with the expansion volute are formed in the expansion volute, and an expansion end radial bearing is arranged between the expansion end bearing seat and the rotor;
a compression end sealing structure is arranged between the compression end diffuser and the rotor and is used for avoiding the reduction of compression efficiency caused by the leakage of gas in a compression cavity to a motor cavity, and a compression end cooling system is arranged in the compression volute and the motor shell and is used for cooling and radiating the thrust bearing, the compression end radial bearing, the stator, the rotor and the expansion end radial bearing to avoid heat accumulation;
an expansion end sealing structure is arranged between the expansion end guider and the rotor and used for preventing wet gas in an expansion cavity from leaking into a motor cavity to corrode the stator and the rotor and damage an air bearing, and an expansion end preheating system is arranged in the expansion volute and the motor shell and used for preheating the expansion volute and the expansion volute so as to reduce the temperature difference between the expansion end and high-temperature gas discharged by a fuel cell stack, reduce the amount of condensation water and reduce the impact damage of liquid drops to the expansion impeller.
2. The integrated device of a high-speed centrifugal air compressor and expander as claimed in claim 1, wherein: the compression end sealing structure comprises a compression end sealing sleeve ring arranged on a rotor between the compression impeller and the thrust disc, a compression end sealing groove matched with the compression end sealing sleeve ring is arranged on the inner hole wall of the compression end diffuser, and the outer edge of the compression end sealing sleeve ring is inserted into the compression end sealing groove and is in clearance fit with the compression end diffuser to form a clearance sealing structure.
3. The high-speed centrifugal air compressor and expander integrated device of claim 2, wherein: the outer end face of the compression end diffuser is connected with a compression end sealing cover plate through a screw, a compression end sealing groove is formed between the compression end sealing cover plate and the compression end diffuser, the compression end sealing sleeve ring compresses the thrust disc on the stepped end face of one end of the rotor, the compression impeller compresses the compression end sealing sleeve ring on the end face of the thrust disc, and the outer end of the compression impeller is fixedly compressed through a compression nut which is installed on the rotor through threads.
4. The high-speed centrifugal air compressor and expander integrated device of claim 1, wherein: the compression end cooling system comprises an air inlet nozzle and a shell air inlet channel which are arranged on a motor shell, a bearing seat air inlet channel is arranged in a compression end bearing seat, a diffuser air inlet channel is arranged in a compression end diffuser, and a bearing seat exhaust channel communicated with the diffuser air inlet channel is also arranged in the compression end bearing seat; the gas enters from the gas inlet nozzle through a shell gas inlet channel and a bearing seat gas inlet channel, one part of the gas enters the interior of a motor shell through a gap between a thrust disc and a compression end bearing seat and a gap between a compression end bearing seat and a rotor, the thrust bearing and the compression end radial bearing on the inner side of the thrust disc are cooled, the other part of the gas enters the interior of the motor shell through a gap between the thrust disc and a compression end diffuser, a diffuser gas inlet channel and a bearing seat exhaust channel, the thrust bearing on the outer side of the thrust disc is cooled, the gas in the motor shell takes away heat generated during the working of a stator and the rotor, the gas enters an expansion end guider through a gap between the expansion end bearing seat and the rotor, the expansion end radial bearing is cooled, and the gas brings away the heat in the compression end and the motor.
5. The integrated device of a high-speed centrifugal air compressor and expander as claimed in claim 1, wherein: the expansion end sealing structure comprises an expansion end sealing lantern ring arranged on the rotor between the expansion impeller and the expansion end bearing seat, an expansion end sealing groove matched with the expansion end sealing lantern ring is arranged on the inner hole wall of the expansion end guider, and the outer edge of the expansion end sealing lantern ring is inserted into the expansion end sealing groove and is in clearance fit with the expansion end guider to form a clearance sealing structure.
6. The high-speed centrifugal air compressor and expander integrated device of claim 5, wherein: the outer end face of the expansion end guider is connected with an expansion end sealing cover plate through a screw, an expansion end sealing groove is formed between the expansion end sealing cover plate and the expansion end guider, the expansion end sealing lantern ring is pressed on the stepped end face of the rotor by the expansion impeller, and the outer end of the expansion impeller is fixedly pressed by a compression nut which is installed on the rotor through threads.
7. The high-speed centrifugal air compressor and expander integrated device of claim 1, wherein: the expansion end preheating system comprises a guider exhaust channel arranged in the expansion end guider, a first preheating cavity is arranged between the motor shell and the expansion volute, a second preheating cavity is arranged in the side wall of the expansion volute, a preheating air inlet channel communicated with the first preheating cavity and the second preheating cavity is arranged in the side wall of the expansion volute, and a preheating exhaust channel communicated with the second preheating cavity is arranged in the side wall of the expansion volute; the gas in the motor shell enters the first preheating cavity through the guider exhaust channel and is used for primary preheating of the expansion volute, the gas in the first preheating cavity enters the second preheating cavity through the preheating gas inlet channel and is used for secondary preheating of the expansion volute, and the gas in the second preheating cavity is discharged outwards from the preheating exhaust channel.
8. The integrated device of the high-speed centrifugal air compressor and the expansion machine as claimed in claim 7, wherein: the second preheating cavity is annularly arranged in the side wall of the expansion volute, the second preheating cavity is arranged in the side wall of the expansion volute and close to the expansion volute, the preheating air inlet channel is arranged in the side wall of the expansion volute and close to the expansion end air inlet, the preheating air inlet channel and the preheating exhaust channel are arranged on two opposite sides of the second preheating cavity, and the preheating exhaust channel is communicated with the expansion end air outlet.
9. The high-speed centrifugal air compressor and expander integrated device of claim 1, wherein: the rotor comprises a middle sleeve, magnetic steel is installed in the middle sleeve, mandrels are arranged at two ends of the magnetic steel respectively, a pressing shaft sleeve is arranged on the outer side of one end, close to the magnetic steel, of each mandrel and fixedly connected with the middle sleeve, the pressing shaft sleeve is used for fixedly pressing the mandrels and the magnetic steel, the pressing shaft sleeve and the middle sleeve are made of high-temperature-resistant non-magnetic materials, and a wear-resistant coating is arranged on the outer surface of the pressing shaft sleeve.
10. The integrated device of a high-speed centrifugal air compressor and expander as claimed in claim 9, wherein: the utility model discloses a bearing, including the magnet steel, the magnet steel is established at the inside intermediate position of middle sleeve, and the dabber at magnet steel both ends sets up with compressing tightly the axle sleeve symmetry, the surface of dabber is equipped with the shaft shoulder, and the inboard that compresses tightly the axle sleeve is equipped with keeps off the platform, and the dabber with compress tightly interference fit pressure equipment between the axle sleeve and be connected, compress tightly the axle sleeve and insert inside the middle sleeve, compress tightly interference fit pressure equipment between axle sleeve and the middle sleeve and be connected, and junction outward flange welded fastening, the dabber flushes and cooperates with the magnet steel terminal surface contact with the one end terminal surface that compresses tightly the axle sleeve and is close to the magnet steel, the one end surface that the magnet steel was kept away from to the dabber is equipped with the ring channel that a plurality of is used for lightening.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211172347.5A CN115434928B (en) | 2022-09-26 | 2022-09-26 | High-speed centrifugal air compressor and expander integrated device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211172347.5A CN115434928B (en) | 2022-09-26 | 2022-09-26 | High-speed centrifugal air compressor and expander integrated device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115434928A true CN115434928A (en) | 2022-12-06 |
| CN115434928B CN115434928B (en) | 2023-08-29 |
Family
ID=84249877
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211172347.5A Active CN115434928B (en) | 2022-09-26 | 2022-09-26 | High-speed centrifugal air compressor and expander integrated device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115434928B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117967598A (en) * | 2024-03-28 | 2024-05-03 | 珠海格力电器股份有限公司 | Rotating shaft assembly, motor and compressor |
| CN117967598B (en) * | 2024-03-28 | 2024-06-28 | 珠海格力电器股份有限公司 | Rotating shaft assembly, motor and compressor |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001234706A (en) * | 2000-02-25 | 2001-08-31 | Ishikawajima Harima Heavy Ind Co Ltd | High speed motor driven compression/expansion apparatus |
| CN111211631A (en) * | 2020-03-05 | 2020-05-29 | 卧龙电气(上海)中央研究院有限公司 | High-speed permanent magnet motor rotor |
| CN211127351U (en) * | 2019-12-30 | 2020-07-28 | 珠海格力电器股份有限公司 | Rotor structure and magnetic suspension motor with same |
| CN212407063U (en) * | 2020-07-03 | 2021-01-26 | 上海优社动力科技有限公司 | Centrifugal compressor |
| CN113027789A (en) * | 2020-04-20 | 2021-06-25 | 珠海格力电器股份有限公司 | Gas suspension compressor and refrigeration equipment |
| CN114838005A (en) * | 2022-06-08 | 2022-08-02 | 河北金士顿科技有限责任公司 | Air compressor machine air-cooling structure and air compressor machine |
| CN114876824A (en) * | 2022-05-23 | 2022-08-09 | 烟台东德实业有限公司 | Air cooling structure of high-speed centrifugal air compressor and expander integrated system |
-
2022
- 2022-09-26 CN CN202211172347.5A patent/CN115434928B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001234706A (en) * | 2000-02-25 | 2001-08-31 | Ishikawajima Harima Heavy Ind Co Ltd | High speed motor driven compression/expansion apparatus |
| CN211127351U (en) * | 2019-12-30 | 2020-07-28 | 珠海格力电器股份有限公司 | Rotor structure and magnetic suspension motor with same |
| CN111211631A (en) * | 2020-03-05 | 2020-05-29 | 卧龙电气(上海)中央研究院有限公司 | High-speed permanent magnet motor rotor |
| CN113027789A (en) * | 2020-04-20 | 2021-06-25 | 珠海格力电器股份有限公司 | Gas suspension compressor and refrigeration equipment |
| CN212407063U (en) * | 2020-07-03 | 2021-01-26 | 上海优社动力科技有限公司 | Centrifugal compressor |
| CN114876824A (en) * | 2022-05-23 | 2022-08-09 | 烟台东德实业有限公司 | Air cooling structure of high-speed centrifugal air compressor and expander integrated system |
| CN114838005A (en) * | 2022-06-08 | 2022-08-02 | 河北金士顿科技有限责任公司 | Air compressor machine air-cooling structure and air compressor machine |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117967598A (en) * | 2024-03-28 | 2024-05-03 | 珠海格力电器股份有限公司 | Rotating shaft assembly, motor and compressor |
| CN117967598B (en) * | 2024-03-28 | 2024-06-28 | 珠海格力电器股份有限公司 | Rotating shaft assembly, motor and compressor |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115434928B (en) | 2023-08-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20240209861A1 (en) | High-speed Centrifugal Compressor | |
| CN111828100A (en) | Serial dry gas sealing device for industrial steam turbine | |
| CN115388017B (en) | Expansion end assembly of high-speed centrifugal air compressor | |
| CN111271304B (en) | Centrifugal air compressor with double cooling systems | |
| CN115434928A (en) | High-speed centrifugal air compressor and expander integrated device | |
| CN219639114U (en) | Three-phase flow shielding pump capable of carrying particles and small amount of gas in idle load | |
| CN115434952B (en) | Heat exchange system of high-speed centrifugal air compressor and expander integrated device | |
| CN218376590U (en) | Bearing cooling device of air bearing turbocharger | |
| CN210889435U (en) | Sealing structure between rotating parts of compressor | |
| CN111810253A (en) | Double-end-face dry air sealing device for industrial steam turbine | |
| CN212028101U (en) | Centrifugal air compressor with double cooling systems | |
| CN213360189U (en) | Split carbon ring type single-end-face dry air sealing device for industrial steam turbine | |
| CN210264827U (en) | Turbine rotor and turbocharger | |
| CN115030784A (en) | Bearing cooling device of air bearing turbocharger | |
| CN210396887U (en) | Turbocharger | |
| Lisyanskii et al. | Practical experience with the introduction of honeycomb shroud seals on 250–800 MW supercritical pressure units | |
| CN218454828U (en) | Axial balance high-speed rotating rotor assembly | |
| CN111810252A (en) | Split carbon ring type serial dry gas sealing device for industrial steam turbine | |
| CN111810251A (en) | Split carbon ring type double-end-face dry air sealing device for industrial steam turbine | |
| CN220037035U (en) | Axial force balancing structure of impeller of air compressor | |
| CN221299568U (en) | High-pressure air seal waterproof structure at worm end of high-speed centrifugal compressor | |
| CN210370803U (en) | Integral ORC turbine device | |
| CN219592206U (en) | Hydrogen energy air compressor motor | |
| CN217652953U (en) | Solar thermal energy power generation high temperature molten salt pump middle bearing seat subassembly structure | |
| CN219932509U (en) | Impeller inlet sealing device of centrifugal fan and centrifugal fan |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |