CN217681876U - Integrated rotor system of micro power generation device - Google Patents
Integrated rotor system of micro power generation device Download PDFInfo
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- CN217681876U CN217681876U CN202221353925.0U CN202221353925U CN217681876U CN 217681876 U CN217681876 U CN 217681876U CN 202221353925 U CN202221353925 U CN 202221353925U CN 217681876 U CN217681876 U CN 217681876U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
Abstract
The utility model provides a miniature power generation facility's integral type rotor system, include: the rotor is of a solid structure, a first end and a second end are respectively arranged at two ends of the rotor, and the first end of the rotor is used for being connected with the coupler; the turbine impeller is of a solid structure and is integrally formed at the second end of the rotor; the compressor impeller is of a solid structure and is integrally formed on the rotor, the compressor impeller is located near the turbine impeller, and the compressor impeller and the turbine impeller are arranged in a back-to-back mode. The utility model discloses can avoid the rotor respectively with the assembly problem of turbine wheel and compressor impeller, solve the difficult problem of the moment of torsion transmission between turbine wheel and the compressor impeller that sets up dorsad, greatly reduce the stress of turbine wheel's center department, adapt to the pressure ratio of higher compressor and the rim linear velocity of higher turbine wheel to improve unit efficiency.
Description
Technical Field
The utility model relates to a miniature electricity generation technical field especially relates to a miniature electricity generation device's integral type rotor system.
Background
Electric power is the most basic, cleanest and most convenient energy source for human society, and due to the current situation of primary energy sources of the earth, the power industry does not change the pattern mainly based on coal-fired power generation for a long time. The coal-fired power generation generates clean energy power and simultaneously generates a large amount of pollution and CO2 emission, and the CO2 emission calculated according to the coal-fired power generation amount in 2011 of China is over 30 hundred million tons. The method aims to protect the environment, save resources, ensure the safety of energy sources, and save energy and reduce emission, and the method is a main target for the development of the technology and products in the power industry.
New energy is repeatedly mentioned in recent years, and the power consumption of coal-fired power generation has been reduced year by year. The new energy in the field of power generation mainly comprises solar energy-based photo-thermal power generation, geothermal energy, tidal power generation and the like, and the power generation based on natural gas also belongs to one of clean energy. The invention relates to a micro gas turbine based on gas power generation, a CO2 turbine based on solar power generation and a micro Brayton cycle device based on nuclear power.
The micro-power generation device generally comprises a centrifugal compressor impeller and a centripetal turbine impeller, and when the power of the device is larger, a multi-stage compression and axial flow turbine are adopted. The shafting structure usually has two types: one is to adopt the cantilever structure of centrifugal compressor and centripetal turbine back to back, the structure is compact, there is no bearing at the cold end, easy to assemble, the reliability is high; the disadvantage is that one of the compressor and the turbine has larger dynamic and static clearance. Another configuration is one in which the motor is intermediate the compressor and turbine discs, forming a single cantilever structure at both ends of the motor (similar to this mechanism, there is also a bearing disposed intermediate the two discs). The structure has the advantages of high transmission efficiency and good reliability; the defects are that the temperature of the position of the turbine wheel disc, close to the bearing of the motor, is very high, the requirement on the heat exchange of the bearing is higher, and the sealing structure of the unit is complex. In order to further improve the efficiency and the operation stability of the unit, the micro power generation device still adopts a cantilever structure that the compressor and the impeller are back-to-back. The most tested structure is the shafting structure.
In the research on the problems of improving the cost performance of the micro power generation device and ensuring the reliability of the shafting, for example, "a micro gas turbine rotor and an assembly method" using a connecting sleeve (chinese patent CN 201710524095.0), the compressor rotor, the turbine rotor and the pull rod of the patent adopt a split design, and the disassembly and the assembly are complicated. For another example, "a micro gas turbine" (chinese patent CN 201320313572.6), the turbine and the compressor of which are of split design, the meshing degree between the turbine and the compressor is not very reliable, and no coupling is used, so that the span of the sleeve bearing is small.
SUMMERY OF THE UTILITY MODEL
In view of the foregoing prior art's shortcoming, the to-be-solved technical problem of the utility model lies in providing a miniature power generation facility's integral type rotor system, can avoid the rotor respectively with the assembly problem of turbine wheel and compressor impeller, solve the difficult problem of torque transmission between turbine wheel and the compressor impeller that sets up dorsad, greatly reduce the stress of turbine wheel's center department, adapt to the pressure ratio of higher compressor and the rim linear velocity of higher turbine wheel to improve unit efficiency.
In order to solve the technical problem, the utility model provides a miniature power generation facility's integral type rotor system, include:
the rotor is of a solid structure, a first end and a second end are respectively arranged at two ends of the rotor, and the first end of the rotor is used for being connected with the coupler;
the turbine impeller is of a solid structure and is integrally formed at the second end of the rotor;
the compressor impeller is of a solid structure and is integrally formed on the rotor, the compressor impeller is located near the turbine impeller, and the compressor impeller and the turbine impeller are arranged in a back-to-back mode.
Preferably, the integrated rotor system of the micro power generation device further comprises a bearing box, the bearing box comprises a bearing sleeve, the rotor is sleeved with the bearing sleeve, and an impeller end bearing for the rotor to rotate and penetrate through is arranged in the bearing sleeve.
Preferably, one side of the bearing sleeve, which is close to the compressor impeller, is provided with a bearing sealing structure, and the bearing sealing structure is provided with an airtight through hole for the rotor to rotatably penetrate through and an oil leakage prevention blowing hole communicated with the airtight through hole.
Preferably, the oil leakage prevention air blowing hole comprises an annular groove part and a straight hole part, the annular groove part is arranged on the hole wall of the airtight through hole, the straight hole part extends along the radial direction of the rotor, the radial inner end of the straight hole part is communicated with the annular groove part, and the radial outer end of the straight hole part is communicated with the bearing sealing structure.
Preferably, the integrated rotor system of the micro power generation device further comprises a seal gas duct; the radial outer end of the straight hole part is communicated with the sealing gas pipeline.
Preferably, the integrated rotor system of the micro power generation device further comprises a power generation motor, the power generation motor comprises a motor rotor, and the motor rotor is connected with the first end of the rotor through a coupler.
Preferably, the coupling is a flexible coupling under the condition that the pressure ratio of the compressor is more than or equal to 5.0 or the rim linear velocity of the turbine is more than or equal to 500m/s, and the coupling is a rigid coupling under the condition that the pressure ratio of the compressor is less than 5.0 or the rim linear velocity of the turbine is less than 500 m/s.
Preferably, the generator motor further comprises a motor housing, and a motor end bearing for the motor rotor to rotate and penetrate is arranged in the motor housing.
Preferably, the number of the motor end bearings is multiple, and at least one motor end bearing is a thrust bearing.
As described above, the utility model discloses a miniature power generation facility's integral type rotor system has following beneficial effect: in the utility model, the rotor, the turbine impeller and the compressor impeller are all solid structures, meanwhile, the turbine impeller is integrally formed at the second end of the rotor, the compressor impeller is integrally formed at the rotor, the compressor impeller is positioned near the turbine impeller and the compressor impeller and the turbine impeller are arranged in a back direction, so the integrated rotor system can be integrally formed by adopting the existing five-axis milling or precision casting manufacturing process, on one hand, the assembly problem of the rotor and the turbine impeller and the compressor impeller can be avoided, and the torque transmission problem between the turbine impeller and the compressor impeller arranged in a back direction is solved; on the other hand, the stress at the center of the turbine wheel can be greatly reduced. Therefore, the utility model discloses an integral type rotor system can avoid the rotor respectively with turbine wheel and compressor impeller's assembly problem, solve the difficult problem of torque transmission between turbine wheel and the compressor impeller that sets up dorsad, greatly reduce the stress of turbine wheel's center department, adapt to the pressure ratio of higher compressor and the rim linear velocity of higher turbine wheel to improve unit efficiency.
Drawings
Fig. 1 is a cross-sectional view of an integrated rotor system of a micro-generator according to the present invention.
Description of the element reference numerals
1. Rotor
2. Turbine wheel
3. Compressor impeller
4. Bearing box
41. Bearing sleeve
411. Bearing sealing structure
42. Impeller end bearing
43. Airtight through hole
44. Oil leakage prevention air blowing hole
5. Power generation motor
51. Motor casing
52. Motor end bearing
6. Coupling device
Detailed Description
The following description is provided for illustrative purposes, and other advantages and features of the present invention will become apparent to those skilled in the art from the following detailed description.
It should be understood that the structures, ratios, sizes, etc. shown in the drawings of the present specification are only used for matching with the contents disclosed in the specification, so as to be known and read by those skilled in the art, and are not used for limiting the limit conditions that the present invention can be implemented, so that the present invention has no technical essential meaning, and any modification of the structures, changes of the ratio relationship, or adjustment of the sizes should still fall within the scope covered by the technical contents disclosed in the present invention without affecting the efficacy and the achievable purpose of the present invention. Meanwhile, the terms such as "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for convenience of description, and are not intended to limit the scope of the present invention, and changes or adjustments of the relative relationship thereof may be made without substantial technical changes, and the present invention is also regarded as the scope of the present invention.
As shown in fig. 1, the utility model provides an integral type rotor system of miniature power generation facility, include:
the rotor 1 is of a solid structure, the two ends of the rotor 1 are respectively a first end and a second end, and the first end of the rotor 1 is used for being connected with the coupler 6;
the turbine impeller 2 is of a solid structure, and the turbine impeller 2 is integrally formed at the second end of the rotor 1;
the compressor impeller 3 is of a solid structure, the compressor impeller 3 is integrally formed on the rotor 1, the compressor impeller 3 is located near the turbine impeller 2, and the compressor impeller 3 and the turbine impeller 2 are arranged in a back-to-back mode.
In the utility model, the rotor 1, the turbine impeller 2 and the compressor impeller 3 are all solid structures, meanwhile, the turbine impeller 2 is integrally formed at the second end of the rotor 1, the compressor impeller 3 is integrally formed at the rotor 1, the compressor impeller 3 is positioned near the turbine impeller 2, and the compressor impeller 3 and the turbine impeller 2 are arranged in a back direction, so the utility model discloses an integrated rotor system can adopt the existing five-axis milling or precision casting manufacturing process to be integrally formed, on one hand, the assembly problem of the rotor 1 and the turbine impeller 2 and the compressor impeller 3 can be avoided, and the torque transmission between the turbine impeller 2 and the compressor impeller 3 which are arranged in a back direction is solved; on the other hand, the stress at the center of the turbine wheel 2 can be greatly reduced (in general, the stress at the center of the existing hollow turbine wheel is twice that of the turbine wheel 2 of the present invention). Compared with the prior art, the utility model discloses a miniature power generation facility's integral type rotor system's concrete technological effect as follows:
firstly, the method comprises the following steps: the pressure ratio of the compressor can be more than 5, the linear velocity of the rim of the turbine can be more than 500m/s, and the efficiency of the unit is greatly improved; the efficiency of the compressor can reach more than 0.8, and the efficiency of the turbine can reach as high as 0.88.
Secondly, the method comprises the following steps: the compressor impeller 3 of the compressor, the turbine impeller 2 of the turbine and the rotor 1 are integrally designed, assembly is not needed, the risk that the compressor impeller 3 or the turbine impeller 2 are sleeved and separated does not exist, and complex designs such as torque transmission between the compressor impeller 3 and the turbine impeller 2 are avoided;
therefore, the utility model discloses an integral type rotor system can avoid rotor 1 respectively with turbine wheel 2 and compressor wheel 3's assembly problem, solve the turbine wheel 2 that sets up dorsad and the difficult problem of torque transmission between the compressor wheel 3, greatly reduce the stress of turbine wheel 2's center department, adapt to the pressure ratio of higher compressor and the rim linear velocity of higher turbine wheel to improve unit efficiency.
In order to enable the integrated rotor system to form a cantilever structure, the integrated rotor system of the micro power generation device further comprises a bearing box 4, the bearing box 4 comprises a bearing sleeve 41, the rotor 1 is sleeved with the bearing sleeve 41, and an impeller end bearing 42 for the rotor 1 to rotate and penetrate through is arranged in the bearing sleeve 41. So set up, because cantilever type structure does not need current exhaust spiral case, the utility model discloses a miniature power generation facility can arrange in line through the pipeline, can save current exhaust spiral case like this. In addition, the impeller-end bearing 42 is located on the side of the compressor wheel 3 facing away from the turbine wheel 2, i.e., the impeller-end bearing 42 is located at the cold end, so that there is no risk of oil leakage combustion of the lubricant oil in the impeller-end bearing 42.
In order to further prevent the lubricant in the bearing sleeve 41 from leaking to the compressor wheel 3, a bearing seal structure 411 is provided on a side of the bearing sleeve 41 close to the compressor wheel 3, and the bearing seal structure 411 is provided with an airtight through hole 43 through which the rotor 1 is rotatably inserted and an oil leakage prevention blow hole 44 communicating with the airtight through hole 43. Further, the oil leakage prevention blow hole 44 may be filled with high pressure seal air, which can prevent the risk of combustion damage caused by the leakage of the lubricant of the impeller end bearing 42 into the compressor. Furthermore, in order to further ensure the airtight effect,
the oil leakage preventing air blowing hole 44 includes an annular groove portion and a straight hole portion, the annular groove portion is provided on the hole wall of the airtight through hole 43, the straight hole portion extends along the radial direction of the rotor 1, the radial inner end of the straight hole portion is communicated with the annular groove portion, and the radial outer end of the straight hole portion is communicated with the bearing sealing structure 411. The integrated rotor system of the micro power generation device further comprises a sealing gas pipeline; the radial outer end of the straight hole part is communicated with the sealing air pipeline.
The integrated rotor system of the micro power generation device further comprises a power generation motor 5, the power generation motor 5 comprises a motor rotor 53, and the motor rotor 53 is connected with the first end of the rotor 1 through a coupler 6. Under the matching action of the bearing box 4 and the coupling 6, the integrated rotor system can realize that the linear velocity of the rim of the turbine is more than 500m/s, and realize higher unit efficiency. Specifically, the coupling 6 is a flexible coupling under the condition that the pressure ratio of the compressor is more than or equal to 5.0 or the rim linear velocity of the turbine is more than or equal to 500m/s, and the coupling 6 is a rigid coupling under the condition that the pressure ratio of the compressor is less than 5.0 or the rim linear velocity of the turbine is less than 500 m/s.
The generator motor 5 further includes a motor housing 51, and a motor end bearing 52 is disposed in the motor housing 51 for the motor rotor 53 to rotatably penetrate therethrough. Since the generator motor 5 also belongs to the cold end, the motor end bearing 52 is also located at the cold end, so that the risk of oil leakage and combustion of the lubricating oil in the motor end bearing 52 does not exist.
In order to avoid the axial play of the motor rotor 53, the number of the motor end bearings 52 is plural, and at least one of the motor end bearings 52 is a thrust bearing.
To sum up, the utility model discloses miniature power generation facility's integral type rotor system can avoid the rotor respectively with turbine wheel and compressor impeller's assembly problem, solves the turbine wheel that sets up dorsad and the difficult problem of the moment of torsion transmission between the compressor wheel, greatly reduces the stress of turbine wheel's center department, adapts to the pressure ratio of higher compressor and higher turbine wheel's rim linear velocity to improve unit efficiency. Therefore, the utility model effectively overcomes various defects in the prior art and has high industrial utilization value.
The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which may be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (9)
1. An integrated rotor system of a micro-power generation device, comprising:
the rotor (1), the rotor (1) is a solid structure, the two ends of the rotor (1) are respectively a first end and a second end, and the first end of the rotor (1) is used for connecting the coupler (6);
the turbine impeller (2), the turbine impeller (2) is a solid structure, the turbine impeller (2) is integrally formed at the second end of the rotor (1);
the compressor impeller (3) is of a solid structure, the compressor impeller (3) is integrally formed on the rotor (1), the compressor impeller (3) is located near the turbine impeller (2), and the compressor impeller (3) and the turbine impeller (2) are arranged in a back-to-back mode.
2. The integrated rotor system of a micro-generator device as set forth in claim 1, wherein: the integrated rotor system of the micro power generation device further comprises a bearing box (4), the bearing box (4) comprises a bearing sleeve (41), the rotor (1) is sleeved with the bearing sleeve (41), and an impeller end bearing (42) for the rotor (1) to rotate to penetrate is arranged in the bearing sleeve (41).
3. The integrated rotor system of a micro-generator device as set forth in claim 2, wherein: and one side of the bearing sleeve (41) close to the compressor impeller (3) is provided with a bearing sealing structure (411), and the bearing sealing structure (411) is provided with an airtight through hole (43) for the rotor (1) to rotate and penetrate through and an oil leakage prevention air blowing hole (44) communicated with the airtight through hole (43).
4. The integrated rotor system of a micro-generator device as set forth in claim 3, wherein: the oil leakage prevention air blowing hole (44) comprises an annular groove part and a straight hole part, the annular groove part is arranged on the hole wall of the airtight through hole (43), the straight hole part extends along the radial direction of the rotor (1), the radial inner end of the straight hole part is communicated with the annular groove part, and the radial outer end of the straight hole part is communicated with the bearing sealing structure (411).
5. The integrated rotor system of a micro-generator device as set forth in claim 4, wherein: the integrated rotor system of the micro power generation device further comprises a sealing gas pipeline; the radial outer end of the straight hole part is communicated with the sealing gas pipeline.
6. The integrated rotor system of a micro-generator device as set forth in claim 1, wherein: the integrated rotor system of the micro power generation device further comprises a power generation motor (5), the power generation motor (5) comprises a motor rotor (53), and the motor rotor (53) is connected with the first end of the rotor (1) through a coupler (6).
7. The integrated rotor system of a micro-generator device as set forth in claim 6, wherein: the coupling (6) is a flexible coupling under the condition that the pressure ratio of the air compressor is more than or equal to 5.0 or the rim linear velocity of the turbine is more than or equal to 500m/s, and the coupling (6) is a rigid coupling under the condition that the pressure ratio of the air compressor is less than 5.0 or the rim linear velocity of the turbine is less than 500 m/s.
8. The integrated rotor system of a micro-generator device as set forth in claim 6, wherein: the power generation motor (5) further comprises a motor shell (51), and a motor end bearing (52) for the motor rotor (53) to rotate and penetrate is arranged in the motor shell (51).
9. The integrated rotor system of a micro-generator device as set forth in claim 8, wherein: the number of the motor end bearings (52) is multiple, and at least one motor end bearing (52) is a thrust bearing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221353925.0U CN217681876U (en) | 2022-05-31 | 2022-05-31 | Integrated rotor system of micro power generation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221353925.0U CN217681876U (en) | 2022-05-31 | 2022-05-31 | Integrated rotor system of micro power generation device |
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| Publication Number | Publication Date |
|---|---|
| CN217681876U true CN217681876U (en) | 2022-10-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221353925.0U Active CN217681876U (en) | 2022-05-31 | 2022-05-31 | Integrated rotor system of micro power generation device |
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| CN (1) | CN217681876U (en) |
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2022
- 2022-05-31 CN CN202221353925.0U patent/CN217681876U/en active Active
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