CN208330470U - A kind of micro turbine generator - Google Patents
A kind of micro turbine generator Download PDFInfo
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- CN208330470U CN208330470U CN201820680248.0U CN201820680248U CN208330470U CN 208330470 U CN208330470 U CN 208330470U CN 201820680248 U CN201820680248 U CN 201820680248U CN 208330470 U CN208330470 U CN 208330470U
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- 230000008878 coupling Effects 0.000 claims abstract description 31
- 238000010168 coupling process Methods 0.000 claims abstract description 31
- 238000005859 coupling reaction Methods 0.000 claims abstract description 31
- 238000012423 maintenance Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 5
- 238000006073 displacement reaction Methods 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- 238000002485 combustion reaction Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The utility model embodiment provides a kind of micro turbine generator, comprising: power head, positive coupling and high-speed motor；Power head includes power head rotor, and high-speed motor includes high speed rotor of motor；Positive coupling includes the first hubcap and the second hubcap；The first end of first hubcap is connect with power head rotor, and the second end rigid connection of the second end of the first hubcap and the second hubcap, the first end of the second hubcap is connect with high speed rotor of motor.In the utility model embodiment, since positive coupling limits the offset deviation of rotatable parts, so as to avoid itself flexible vibration of rotatable parts in generator operation, the resonance of generator is further avoided.At the same time, since positive coupling has the characteristics that part is few, light-weight and structure is simple, the structure of micro turbine generator is simplified, is maintained convenient for later maintenance, reduces overall cost.
Description
Technical Field
The embodiment of the utility model provides a relate to generator technical field, more specifically relates to a miniature turbogenerator.
Background
The micro turbine generator is a small distributed energy system and a power generation device, has the characteristics of high energy utilization rate, small environmental pollution, good economic benefit and the like, has good development prospect, and has important significance for relieving the situation of energy shortage. The micro turbine generator has two parts of rotating parts, namely a power head and a high-speed motor. In the related art, a flexible coupling is generally used to connect the power head rotor and the high-speed motor rotor. However, since the flexible coupling allows for individual axial displacement of the rotors and there can be some misalignment between the two coupled rotors, the misalignment of the flexible coupling can cause multiple points of vibration and resonance during operation of the microturbine generator, causing damage to the internal components of the microturbine generator.
SUMMERY OF THE UTILITY MODEL
In order to solve the above problems, embodiments of the present invention provide a micro turbine generator that overcomes or at least partially solves the above problems.
An embodiment of the utility model provides a miniature turbogenerator, include: the power head, the rigid coupling and the high-speed motor; the power head comprises a power head rotor, and the high-speed motor comprises a high-speed motor rotor; the rigid coupling comprises a first shaft end cover and a second shaft end cover; the first end part of the first shaft end cover is connected with the power head rotor, the second end part of the first shaft end cover is rigidly connected with the second end part of the second shaft end cover, and the first end part of the second shaft end cover is connected with the high-speed motor rotor.
The second end part of the second shaft end cover is inwards sunken along the axis direction to form a first hole, and the first shaft is inserted into the first hole; or the second end part of the first shaft end cover is inwards sunken along the axial direction to form a second hole, the second end part of the second shaft end cover is inwards sunken along the axial direction to form a second shaft, and the second shaft is inserted into the second hole.
The first shaft end cover and the second shaft end cover are fixed through the locking nut.
The first end part of the first shaft end cover is inwards sunken along the axis direction to form a third hole, and the end part of the power head rotor is in interference connection with the third hole; the first end part of the second shaft end cover is inwards sunken along the axis direction to form a fourth hole, and the end part of the high-speed motor rotor is in interference connection with the fourth hole.
The power head rotor comprises a turbine, a hollow shaft and a compressed air impeller; one end of the hollow shaft is connected with the center of the turbine, the other end of the hollow shaft is connected with one end of the center of the air compressing impeller, and the other end of the center of the air compressing impeller is in interference connection with the third hole.
The power head also comprises a first air bearing and an air bearing seat; the first air bearing surrounds the outer portion of the hollow shaft, and the air bearing seat surrounds the outer portion of the first air bearing.
The power head also comprises a gas compressor panel and a gas inlet cover; the air compressor panel surrounds the outside of the air compressor impeller, one end of the air inlet cover is connected with the air compressor panel, the other end of the air inlet cover is connected with a high-speed motor shell of the high-speed motor, the air inlet cover surrounds the outside of the rigid coupling, and an air inlet is formed in the air inlet cover.
The high-speed motor also comprises a high-speed motor stator and a second air bearing; the stator of the high-speed motor surrounds the outside of the middle part of the rotor of the high-speed motor, and the second air bearing surrounds the outside of the head part and the tail part of the rotor of the high-speed motor.
The high-speed motor also comprises a high-speed motor shell, and the high-speed motor shell surrounds the second air bearing and the outside of the high-speed motor stator.
Wherein, the high-speed motor rotor is a hollow structure.
The embodiment of the utility model provides a miniature turbine generator, include: the power head, the rigid coupling and the high-speed motor; the power head comprises a power head rotor, and the high-speed motor comprises a high-speed motor rotor; the rigid coupling comprises a first shaft end cover and a second shaft end cover; the first end part of the first shaft end cover is connected with the power head rotor, the second end part of the first shaft end cover is rigidly connected with the second end part of the second shaft end cover, and the first end part of the second shaft end cover is connected with the high-speed motor rotor. The rigid coupling limits the displacement deviation of the rotating component, so that the self flexible vibration of the rotating component in the running process of the generator is avoided, and the resonance of the generator is further avoided. Meanwhile, the rigid coupling has the characteristics of few parts, light weight and simple structure, so that the structure of the micro turbine generator is simplified, later maintenance is facilitated, and the overall cost is reduced.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are not restrictive of embodiments of the invention.
Drawings
Fig. 1 is a schematic structural diagram of a micro turbine generator according to an embodiment of the present invention;
fig. 2 is a schematic view of a rotor connection structure of a micro turbine generator according to an embodiment of the present invention;
fig. 3 is a schematic structural view of a first shaft end cover of a micro turbine generator according to an embodiment of the present invention;
fig. 4 is a schematic structural view of a second shaft end cover of a micro turbine generator according to an embodiment of the present invention;
in the figure, 1: turbine, 2: hollow shaft, 3: air bearing seat, 4: first air bearing, 5: compressed air impeller, 6: compressor panel, 7: air inlet cover, 8: first shaft end cover, 9: second shaft end cap, 10: high-speed motor rotor, 11: second air bearing, 12: high-speed motor stator, 13: high-speed motor housing.
Detailed Description
The following describes embodiments of the present invention in further detail with reference to the drawings and examples. The following examples are presented to illustrate embodiments of the present invention, but are not intended to limit the scope of embodiments of the present invention.
In the description of the embodiments of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience of describing the embodiments of the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the embodiments of the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the embodiments of the present invention, it should be noted that unless explicitly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the embodiments of the present invention can be understood in specific cases by those skilled in the art.
The micro turbine generator comprises a power head and a high-speed motor. Mechanical energy is typically generated by the powerhead and transferred to a high-speed electric machine that converts the received mechanical energy into electrical energy to generate electricity. In the related art, a flexible connection such as a flexible coupling is generally used to connect the power head and the high-speed motor. Since the flexible connection allows the deviation of each rotating component in the micro turbine generator, the rotating component can move a certain displacement when rotating and collide with other components after moving, thereby generating mechanical vibration. Since the different rotating parts are located at different positions of the micro turbine generator, the vibration generated by each rotating part causes the micro turbine generator to generate multi-point vibration, which further causes mechanical resonance. Mechanical resonance can cause large deformations and dynamic stresses on the equipment structure of the microturbine generator, with damaging consequences for the microturbine generator. In view of the above, embodiments of the present invention provide a micro turbine generator. Referring to fig. 1, comprising:
the power head, the rigid coupling and the high-speed motor; the power head comprises a power head rotor, and the high-speed motor comprises a high-speed motor rotor 10; the rigid coupling comprises a first shaft end cover 8 and a second shaft end cover 9; the first end part of the first shaft end cover 8 is connected with the power head rotor, the second end part of the first shaft end cover 8 is rigidly connected with the second end part of the second shaft end cover 9, and the first end part of the second shaft end cover 9 is connected with the high-speed motor rotor 10.
Specifically, the rigid coupling is a torsionally rigid coupling which does not have any backlash even when subjected to a load, and which rigidly transmits a torque even when a load is generated due to a deviation. The rigid coupling is used to couple two shafts (driving shaft and driven shaft) in different mechanisms for common rotation to transmit torque. In the micro turbine generator, a power head rotor included in a power head is a driving shaft, and a high-speed motor rotor 10 included in a high-speed motor is a driven shaft. The power head rotor actively rotates and drives the high-speed motor rotor 10 to rotate through the rigid coupling. The rigid coupling specifically comprises a first shaft end cover and a second shaft end cover, and the power head rotor is connected with the high-speed motor rotor 10 sequentially through the first shaft end cover and the second shaft end cover. It should be noted that in the related art, the shaft end cover generally functions as an axial positioning of the bearing outer ring and a dust-proof and sealing in the bearing working process. However, the embodiment of the present invention provides a first shaft end cover 8 and a second shaft end cover 9 which are connecting pieces specially designed for the power head rotor and the high-speed motor rotor 10, and the main function of the connecting pieces is to form a rigid coupling to realize the connection function between the power head rotor and the high-speed motor rotor.
The embodiment of the utility model provides a miniature turbine generator, include: the power head, the rigid coupling and the high-speed motor; the power head comprises a power head rotor, and the high-speed motor comprises a high-speed motor rotor; the rigid coupling comprises a first shaft end cover and a second shaft end cover; the first end part of the first shaft end cover is connected with the power head rotor, the second end part of the first shaft end cover is rigidly connected with the second end part of the second shaft end cover, and the first end part of the second shaft end cover is connected with the high-speed motor rotor. The rigid coupling limits the displacement deviation of the rotating component, so that the self flexible vibration of the rotating component in the running process of the generator is avoided, and the resonance of the generator is further avoided. Meanwhile, the rigid coupling has the characteristics of few parts, light weight and simple structure, so that the structure of the micro turbine generator is simplified, later maintenance is facilitated, and the overall cost is reduced.
Referring to fig. 3 and 4, based on the content of the above embodiment, as an alternative embodiment, there is provided a structure for rigidly connecting the second end of the first shaft end cover 8 and the second end of the second shaft end cover 9, including but not limited to: the second end of the first shaft end cover 8 protrudes outwards along the axial direction to form a first shaft, the second end of the second shaft end cover 9 is recessed inwards along the axial direction to form a first hole, and the first shaft is inserted into the first hole; alternatively, the second end of the first shaft end cover 8 is recessed inward in the axial direction to form a second hole, the second end of the second shaft end cover 9 is recessed inward in the axial direction to form a second shaft, and the second shaft is inserted into the second hole. In particular, in order to achieve a rigid connection between the first shaft end cover 8 and the second shaft end cover 9, the two manners described above can be adopted. As shown in fig. 3 and 4, the first implementation is that the first shaft of the first shaft end cover is inserted into the second hole of the second shaft end cover to form a rigid connection. It will be appreciated that the second implementation, in which the second shaft of the second shaft end cap is inserted into the second bore of the first shaft end cap, may also form a rigid connection.
Based on the above disclosure of the embodiments, as an alternative embodiment, there is provided a structure for fixing a first shaft end cover and a second shaft end cover, including but not limited to: the first shaft end cover 8 and the second shaft end cover 9 are fixed through locking nuts. Specifically, threaded holes which are uniformly arranged in a penetrating mode are drilled between the outer circle surface and the inner circle thread surface of the locking nut, and the number of the threaded holes can be selected according to requirements. Taking the first implementation manner as an example, referring to fig. 3 and 4, before the first shaft is inserted into the first hole, a locking nut may be fixedly sleeved outside the first shaft and the first hole in advance. After the first shaft is inserted into the first hole, the two locking nuts can form a whole, and the threaded holes correspondingly arranged on the two locking nuts form a threaded hole. The countersunk screws can then be screwed through the threaded holes to secure the first and second shaft end caps 8, 9.
Based on the above disclosure of the embodiments, as an alternative embodiment, there is provided a structure for connecting a first shaft end cover and a power head rotor and connecting a second shaft end cover and a high-speed electrode rotor, including but not limited to: the first end part of the first shaft end cover 8 is inwards sunken along the axial direction to form a third hole, and the end part of the power head rotor is in interference connection with the third hole; the first end of the second shaft end cover 9 is recessed inwards along the axis direction to form a fourth hole, and the end of the high-speed motor rotor 10 is in interference connection with the fourth hole. Specifically, the interference connection is to utilize the interference value of the shaft and the hole to generate elastic pressure on the surface of the part after assembly so as to obtain tight connection. Specifically, for the first shaft end cap 8, the size of the powerhead rotor is larger than the size of the third bore; for the second shaft end cover 9, the size of the high speed motor rotor is larger than the size of the fourth hole. The interference connection has simple structure, good centering precision, can bear torque, axial force or the combined load of the torque and the axial force, has high bearing capacity and can work more reliably under the impact vibration load. The interference connection processing method can adopt a press-in method or a temperature difference method and the like, and the embodiment of the utility model provides a do not limit this.
Referring to fig. 2, based on the content of the above embodiment, as an alternative embodiment, the power head rotor includes a turbine 1, a hollow shaft 2 and a compressor impeller 5; one end of the hollow shaft 2 is connected with the center of the turbine 1, the other end of the hollow shaft 2 is connected with one end of the center of the air compressing impeller 5, and the other end of the center of the air compressing impeller 5 is in interference connection with the third hole. Specifically, the energy generated by the combustion of the fuel drives the turbine 1 to rotate at a high speed and transmits kinetic energy to the compressor impeller 5 and the high-speed motor rotor 10 through the hollow shaft 2. The hollow shaft 2 is used for transmitting the kinetic energy of the turbine 1, and compared with a solid shaft, the hollow shaft with a hollow structure has the advantages of good torsional strength, light weight and small load on a bearing outside the hollow shaft, the power head rotor can be suspended by adopting 20000 revolutions per minute of the hollow shaft, and the solid shaft needs higher rotating speed. The turbine 1 can drive the compressor impeller 5 to rotate through the hollow shaft 2, and can pressurize and heat fresh air and feed the fresh air into a combustion chamber to combust fuel, so that the turbine 1 is further driven to rotate.
Based on the content of the above embodiment, as an alternative embodiment, the power head further comprises a first air bearing 4 and an air bearing seat 3; the first air bearing 4 surrounds the hollow shaft 2, and the air bearing seat 3 surrounds the first air bearing 4. In particular, the air bearing, also called an air bearing, refers to a sliding bearing using gas (usually air, but possibly other gases) as a lubricant, and since there is no mechanical contact, the wear is minimized, thereby ensuring stability of the accuracy of the rotor of the power head in the bearing. The first air bearing 4 is used to support the high speed rotation of the powerhead rotor within the first air bearing 4. The air bearing seat 3 is sleeved outside the first air bearing 4 and used for fixing the first air bearing 4 and other non-rotating parts of the power head.
Based on the content of the above embodiment, as an optional embodiment, the power head further includes a compressor panel 6 and an air intake cover 7; the compressor panel 6 surrounds the outside of the compressor impeller 5, one end of the air inlet cover 7 is connected with the compressor panel 6, the other end of the air inlet cover 7 is connected with the high-speed motor shell 13 of the high-speed motor, the air inlet cover 7 surrounds the outside of the rigid coupling, and the air inlet is formed in the air inlet cover 7. Specifically, the compressor panel 6 is used to secure the inlet cowl 7 and other non-rotating components within the power head. The air inlet cover 7 is used for connecting the power head and a non-rotating part outside the high-speed motor, namely a high-speed motor shell 13, an air inlet is formed in the air inlet cover 7, and air can be sent into the combustion chamber through the air inlet by the air compressor impeller 5.
Based on the content of the above embodiment, as an alternative embodiment, the high-speed motor further includes a high-speed motor stator 12 and a second air bearing 11; the high-speed motor stator 12 surrounds the outside of the middle part of the high-speed motor rotor 10, and the second air bearing 11 surrounds the outside of the head part and the tail part of the high-speed motor rotor 10. Specifically, the high-speed motor stator 12 is a stationary part within the high-speed motor, and the high-speed motor rotor 10 rotates relative to the high-speed motor stator 12 to convert mechanical energy into electrical energy. The second air bearing 11 is used to support the high speed motor rotor 10 for high speed rotation within the second air bearing 11.
Based on the content of the above embodiment, as an alternative embodiment, the high-speed motor further includes a high-speed motor housing 13, and the high-speed motor housing 13 surrounds the second air bearing 11 and the exterior of the high-speed motor stator 12. Specifically, the high-speed motor housing 13 is provided at the outermost layer of the high-speed motor for fixing the non-rotating parts of the high-speed motor (including the second air bearing 11 and the high-speed motor stator 12).
Based on the above description of the embodiments, as an alternative embodiment, the high-speed motor rotor 10 has a hollow structure. The high-speed motor rotor 10 is provided with a hollow structure, so that the weight can be reduced, and higher rotating speed can be obtained under the same rotating driving force.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (10)
1. A microturbine generator, comprising: the power head, the rigid coupling and the high-speed motor; the power head comprises a power head rotor, and the high-speed motor comprises a high-speed motor rotor; the rigid coupling comprises a first shaft end cover and a second shaft end cover; the first end part of the first shaft end cover is connected with the power head rotor, the second end part of the first shaft end cover is rigidly connected with the second end part of the second shaft end cover, and the first end part of the second shaft end cover is connected with the high-speed motor rotor.
2. The microturbine generator of claim 1, wherein:
the second end part of the first shaft end cover protrudes outwards along the axial direction to form a first shaft, the second end part of the second shaft end cover is recessed inwards along the axial direction to form a first hole, and the first shaft is inserted into the first hole; or,
the second end part of the first shaft end cover is inwards sunken along the axial direction to form a second hole, the second end part of the second shaft end cover is inwards sunken along the axial direction to form a second shaft, and the second shaft is inserted into the second hole.
3. The microturbine generator of claim 2 wherein the first and second shaft end caps are secured by retaining nuts.
4. The microturbine generator of claim 1, wherein:
the first end part of the first shaft end cover is inwards sunken along the axial direction to form a third hole, and the end part of the power head rotor is in interference connection with the third hole;
the first end part of the second shaft end cover is inwards sunken along the axis direction to form a fourth hole, and the end part of the high-speed motor rotor is in interference connection with the fourth hole.
5. The microturbine generator of claim 4 wherein said power head rotor includes a turbine, a hollow shaft and a compressor wheel; one end of the hollow shaft is connected with the center of the turbine, the other end of the hollow shaft is connected with one end of the center of the air compressing impeller, and the other end of the center of the air compressing impeller is in interference connection with the third hole.
6. The microturbine generator of claim 5 wherein said power head further includes a first air bearing and an air bearing housing; the first air bearing ring is wound outside the hollow shaft, and the air bearing seat is wound outside the first air bearing.
7. The micro-turbo generator of claim 5, wherein the power head further comprises a compressor panel and an air intake shroud; the air compressor panel surrounds the outside of the air compressor impeller, one end of the air inlet cover is connected with the air compressor panel, the other end of the air inlet cover is connected with a high-speed motor shell of the high-speed motor, the air inlet cover surrounds the outside of the rigid coupling, and an air inlet is formed in the air inlet cover.
8. The microturbine generator of claim 1 wherein the high speed electric machine further comprises a high speed electric machine stator and a second air bearing; the high-speed motor stator surrounds the outer part of the middle part of the high-speed motor rotor, and the second air bearing surrounds the outer parts of the head part and the tail part of the high-speed motor rotor.
9. The microturbine generator of claim 8 wherein the high speed electric machine further includes a high speed machine housing surrounding the second air bearing and the exterior of the high speed machine stator.
10. The microturbine generator of claim 1 wherein the high speed motor rotor is a hollow structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820680248.0U CN208330470U (en) | 2018-05-08 | 2018-05-08 | A kind of micro turbine generator |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201820680248.0U CN208330470U (en) | 2018-05-08 | 2018-05-08 | A kind of micro turbine generator |
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| CN208330470U true CN208330470U (en) | 2019-01-04 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108386236A (en) * | 2018-05-08 | 2018-08-10 | 武汉英康汇通电气有限公司 | A kind of micro turbine generator |
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2018
- 2018-05-08 CN CN201820680248.0U patent/CN208330470U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108386236A (en) * | 2018-05-08 | 2018-08-10 | 武汉英康汇通电气有限公司 | A kind of micro turbine generator |
| CN108386236B (en) * | 2018-05-08 | 2024-10-11 | 武汉英康汇通电气有限公司 | Miniature turbine generator |
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