CN116707191A - Large-scale turbo generator rotor turn conductor ventilation system structure - Google Patents
Large-scale turbo generator rotor turn conductor ventilation system structure Download PDFInfo
- Publication number
- CN116707191A CN116707191A CN202310717966.6A CN202310717966A CN116707191A CN 116707191 A CN116707191 A CN 116707191A CN 202310717966 A CN202310717966 A CN 202310717966A CN 116707191 A CN116707191 A CN 116707191A
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- Prior art keywords
- rotor
- ventilation
- grooves
- radial
- rotor turn
- 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.)
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Links
- 238000009423 ventilation Methods 0.000 title claims abstract description 144
- 239000004020 conductor Substances 0.000 title claims abstract description 67
- 238000004804 winding Methods 0.000 claims abstract description 22
- 238000009413 insulation Methods 0.000 claims abstract description 13
- 230000005284 excitation Effects 0.000 claims description 4
- 230000017525 heat dissipation Effects 0.000 abstract description 4
- 238000010248 power generation Methods 0.000 abstract description 2
- 238000001816 cooling Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 239000000306 component Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
- H02K3/24—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors with channels or ducts for cooling medium between the conductors
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/26—Rotor cores with slots for windings
- H02K1/265—Shape, form or location of the slots
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/32—Rotating parts of the magnetic circuit with channels or ducts for flow of cooling medium
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/32—Windings characterised by the shape, form or construction of the insulation
- H02K3/34—Windings characterised by the shape, form or construction of the insulation between conductors or between conductor and core, e.g. slot insulation
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/32—Windings characterised by the shape, form or construction of the insulation
- H02K3/34—Windings characterised by the shape, form or construction of the insulation between conductors or between conductor and core, e.g. slot insulation
- H02K3/345—Windings characterised by the shape, form or construction of the insulation between conductors or between conductor and core, e.g. slot insulation between conductor and core, e.g. slot insulation
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Motor Or Generator Cooling System (AREA)
Abstract
The invention provides a large-scale turbo-generator rotor turn conductor ventilation system structure, which belongs to the technical field of generators and comprises a rotor axial ventilation groove axially arranged on a rotor core; rotor turn conductors are arranged on the rotor core at intervals, and a plurality of radial ventilation grooves are formed in the rotor turn conductors and are communicated with the rotor axial ventilation grooves; a plurality of pairs of symmetrical ventilation grooves are formed in the rotor turn conductor, and the two symmetrical ventilation grooves are communicated with each other. According to the invention, the cuboid grooves and the symmetrical through grooves are formed on the rotor turn conductors of the motor structure, so that the motor is more fully utilized in rotation, the energy loss caused by air flowing in the rotor turn conductors is reduced, the heat dissipation capacity of the rotor ventilation grooves is effectively improved under the two working conditions of motor electric-power generation of the large-sized turbogenerator, the average temperature of the exciting winding is further reduced, the insulation health state is facilitated, and the motor running performance is improved.
Description
Technical Field
The invention relates to the technical field of generators, in particular to a large-scale turbogenerator rotor turn conductor ventilation system structure, a turbogenerator rotor and a turbogenerator.
Background
The turbo generator is very suitable for peak shaving cameras of a power system due to the simple ventilation and cooling system. The electromagnetic load and the thermal load of the high-capacity steam turbine generator are increased along with the continuous increase of the capacity, so that the generator can generate a large amount of heat, and a proper ventilation cooling system is required to take away the heat, thereby avoiding serious accidents of overheat and burnout of the generator caused by overhigh temperature of structural components of the generator.
At present, a rotor magnetic field of a large-capacity steam turbine generator is established by an electric excitation winding, and in order to reduce the temperature of the excitation winding, a ventilation cooling system consisting of an auxiliary groove and a radial ventilation groove is generally adopted. However, in the traditional ventilation system, due to unreasonable design of the air duct, the wind resistance is large, so that the wind quantity is reduced or the wind pressure is low, and the heat generated by the winding cannot be fully taken away.
Disclosure of Invention
The invention aims to provide a large-sized turbogenerator rotor turn conductor ventilation system structure, a turbogenerator rotor and a turbogenerator, which improve the heat dissipation effect of a rotor turn conductor and a rotor core component, prolong the insulation life and ensure the safe operation of a motor, so as to solve at least one technical problem in the background technology.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
in one aspect, the present invention provides a large turbo-generator rotor turn conductor ventilation system structure comprising: a rotor axial ventilation groove 2 axially arranged on the rotor core 1; rotor turn conductors 3 are arranged on the rotor core 1 at intervals, a plurality of radial ventilation grooves 4 are arranged on the rotor turn conductors 3, and the radial ventilation grooves 4 are communicated with the rotor axial ventilation grooves 2; a plurality of pairs of symmetrical ventilation grooves 5 are arranged on the rotor turn conductor 3, and the two symmetrical ventilation grooves 5 are communicated with each other.
Optionally, the air circulation inlet of the radial ventilation groove 4 is communicated with the rotor axial ventilation groove 2, and the air circulation outlet of the radial ventilation groove 4 is positioned on the surface of the rotor turn conductor 3.
Optionally, an air circulation inlet of the radial ventilation groove 4 is communicated with the rotor axial ventilation groove 2, and an air circulation outlet of the radial ventilation groove 4 is communicated with the ventilation groove 5.
Alternatively, the central axis of the radial ventilation slots 4 is offset from the radial direction of the rotor core 1 by a certain angle.
Alternatively, the central axis of the radial ventilation groove 4 is offset from a plane perpendicular to the axial direction of the rotor core 1 by a certain angle.
Optionally, the radial ventilation groove 4 is a cuboid groove.
Optionally, the rotor turn conductor 3 includes a winding insulation 6, and an excitation winding 7 disposed within the winding insulation 6.
Alternatively, the symmetrical ventilation grooves 5 communicating with each other are grooves which are parallel and communicate with each other at the bottom along the circumferential direction of the rotor core 1 and perpendicular to the central axis of the rotor core 1.
In a second aspect, the present invention provides a turbo-generator rotor comprising a large turbo-generator rotor turn conductor ventilation system structure as described above.
In a third aspect, the present invention provides a turbo-generator comprising a turbo-generator rotor as described above.
The invention has the beneficial effects that: by arranging the cuboid grooves and the symmetrical through grooves on the rotor turn conductors of the motor structure, the motor is rotated to be fully utilized, the energy loss of air flowing in the rotor turn conductors is reduced, the heat dissipation capacity of the rotor ventilation grooves is effectively improved under the two working conditions of motor electric-power generation of the large-sized turbogenerator, the average temperature of the exciting winding is further reduced, the insulating health state is facilitated, and the motor running performance is improved.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a structural perspective view of a ventilation system for a rotor turn conductor of a large-sized turbo generator according to embodiment 1 of the present invention.
Fig. 2 is a structural cross-sectional view of a large-sized turbo generator rotor turn conductor ventilation system according to embodiment 1 of the present invention.
Fig. 3 is a structural view of a rotor turn conductor according to embodiment 1 of the present invention.
Fig. 4 is a structural view of a rotor turn conductor according to embodiment 1 of the present invention.
Fig. 5 is a schematic illustration of the ventilation of the radial ventilation groove and ventilation groove of embodiment 1 of the present invention.
Fig. 6 is a schematic ventilation diagram of the communication cooperation between the radial ventilation groove and the ventilation groove according to embodiment 2 of the present invention.
Wherein: 1-a rotor core; 2-an axial ventilation slot; 3-rotor turn conductors; 4-radial ventilation slots; 5-ventilation channels; 6-winding insulation; 7-exciting winding.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements throughout or elements having like or similar functionality. The embodiments described below by way of the drawings are exemplary only and should not be construed as limiting the invention.
It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
As used herein, the singular forms "a", "an", "the" and "the" are intended to include the plural forms as well, unless expressly stated otherwise, as understood by those skilled in the art. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, and/or groups thereof.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
In the description of this specification, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
In the description of the present specification, the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate an orientation or positional relationship based on that shown in the drawings, merely for convenience of description and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present technology.
The terms "mounted," "connected," and "disposed" are to be construed broadly, and may be, for example, fixedly connected, disposed, detachably connected, or integrally connected, disposed, unless otherwise specifically defined and limited. The specific meaning of the above terms in the present technology can be understood by those of ordinary skill in the art according to the specific circumstances.
In order that the invention may be readily understood, a further description of the invention will be rendered by reference to specific embodiments that are illustrated in the appended drawings and are not to be construed as limiting embodiments of the invention.
It will be appreciated by those skilled in the art that the drawings are merely schematic representations of examples and that the elements of the drawings are not necessarily required to practice the invention.
Example 1
As shown in fig. 1 to 4, in this embodiment 1, there is provided a ventilation system structure of a rotor turn conductor of a large-sized turbo generator, the ventilation system structure including: a rotor axial ventilation groove 2 axially arranged on the rotor core 1; rotor turn conductors 3 are arranged on the rotor core 1 at intervals, and the rotor turn conductors 3 comprise winding insulations 6 and exciting windings 7 arranged in the winding insulations 6. A plurality of radial ventilation grooves 4 are formed in the rotor turn conductor 3, and the radial ventilation grooves 4 are communicated with the rotor axial ventilation grooves 2; a plurality of pairs of symmetrical ventilation grooves 5 are arranged on the rotor turn conductor 3, and the two symmetrical ventilation grooves 5 are communicated with each other.
Wherein the air circulation inlet of the radial ventilation groove 4 is communicated with the rotor axial ventilation groove 2, and the air circulation outlet of the radial ventilation groove 4 is positioned on the surface of the rotor turn conductor 3. The central axis of the radial ventilation slots 4 is offset from the radial direction of the rotor core 1 by a certain angle. The central axis of the radial ventilation groove 4 is offset from a plane perpendicular to the axial direction of the rotor core 1 by a certain angle.
In this embodiment, the radial ventilation groove 4 is a rectangular parallelepiped groove.
The symmetrical ventilation grooves 5 are grooves which are communicated with each other along the circumferential direction of the rotor core 1 and are perpendicular to the central axis of the rotor core 1, and the two grooves are parallel and communicated with each other at the bottom.
As shown in fig. 5, in the rotor ventilation system structure of the turbo generator according to embodiment 1, when in use, air flows into the inlet of the radial ventilation slot 4 from the rotor axial ventilation slot 2, and then flows out from the outlet of the radial ventilation slot 4 located on the surface of the rotor turn conductor 3, so as to dissipate heat of the rotor core. On the other hand, air circulates through the symmetrical ventilation grooves 5 which communicate with each other, and simultaneously dissipates heat from the rotor core. The heat dissipation efficiency of the rotor core is improved.
Example 2
As shown in fig. 6, in this embodiment 2, there is provided a ventilation system structure of a rotor turn conductor of a large-sized turbo generator, the ventilation system structure including: a rotor axial ventilation groove 2 axially arranged on the rotor core 1; rotor turn conductors 3 are arranged on the rotor core 1 at intervals, and the rotor turn conductors 3 comprise winding insulations 6 and exciting windings 7 arranged in the winding insulations 6. A plurality of radial ventilation grooves 4 are formed in the rotor turn conductor 3, and the radial ventilation grooves 4 are communicated with the rotor axial ventilation grooves 2; a plurality of pairs of symmetrical ventilation grooves 5 are arranged on the rotor turn conductor 3, and the two symmetrical ventilation grooves 5 are communicated with each other.
Wherein, unlike in embodiment 1, the air circulation inlet of the radial ventilation groove 4 communicates with the rotor axial ventilation groove 2, and the air circulation outlet of the radial ventilation groove 4 communicates with the ventilation groove 5. The central axis of the radial ventilation slots 4 is offset from the radial direction of the rotor core 1 by a certain angle. The central axis of the radial ventilation groove 4 is offset from a plane perpendicular to the axial direction of the rotor core 1 by a certain angle.
In this embodiment 2, symmetrically connected ventilation grooves on both sides of the rotor turn conductors are formed as the upper half of the ventilation structure, and radial ventilation grooves are formed as the lower half.
In this embodiment, the radial ventilation groove 4 is a rectangular parallelepiped groove.
The symmetrical ventilation grooves 5 are grooves which are communicated with each other along the circumferential direction of the rotor core 1 and are perpendicular to the central axis of the rotor core 1, and the two grooves are parallel and communicated with each other at the bottom.
As shown in fig. 6, in the rotor ventilation system structure of the turbo generator according to embodiment 2, when in use, air flows into the inlet of the radial ventilation groove 4 from the rotor axial ventilation groove 2, flows out from the outlet of the radial ventilation groove 4 through the ventilation groove 5, and dissipates heat from the rotor core.
Example 3
In this example 3, a turbo generator rotor having a large turbo generator rotor turn conductor ventilation system structure as described in example 1 is provided.
Example 4
In this example 4, a turbo generator is provided that includes a turbo generator rotor as described in example 3.
Example 5
In this example 5, a turbo generator rotor having a large turbo generator rotor turn conductor ventilation system structure as described in example 2 is provided.
Example 6
In this example 6, a turbo generator is provided that includes a turbo generator rotor as described in example 5.
Example 7
In this embodiment 7, there is provided a ventilation system structure of a rotor turn conductor of a large-sized turbo generator, the ventilation system structure including: a rotor axial ventilation groove 2 axially arranged on the rotor core 1; rotor turn conductors 3 are arranged on the rotor core 1 at intervals, and the rotor turn conductors 3 comprise winding insulations 6 and exciting windings 7 arranged in the winding insulations 6. A plurality of radial ventilation grooves 4 are formed in the rotor turn conductor 3, and the radial ventilation grooves 4 are communicated with the rotor axial ventilation grooves 2; a plurality of pairs of symmetrical ventilation grooves 5 are arranged on the rotor turn conductor 3, and the two symmetrical ventilation grooves 5 are communicated with each other.
In this example 7, unlike example 1 and example 2, the following is: there is a portion of radial ventilation slots 4 whose air flow inlet communicates with said rotor axial ventilation slots 2 and whose air flow outlet communicates with ventilation channels 5. There is a further part of radial ventilation slots 4 whose air flow inlet communicates with said rotor axial ventilation slots 2, while the air flow outlet is located at the surface of the rotor turn conductors 3. The two-part ventilation may be alternately arranged in the axial direction of the rotor core.
Example 8
In this example 8, a turbo generator rotor having a large turbo generator rotor turn conductor ventilation system structure as described in example 7 is provided.
Example 9
In this example 9, a turbo generator is provided that includes a turbo generator rotor as described in example 8.
In summary, according to the structure of the large-sized turbo-generator rotor turn conductor ventilation system provided by the embodiment of the invention, the center line of the radial ventilation groove and the center line of the axial ventilation groove deviate by an angle, so that the wind resistance caused by the secondary air flow at the inlet can be reduced. The central axis of the radial ventilation slots of the rotor turn conductors is offset from the plane perpendicular to the axial direction of the rotor core 1 by an angle such that the air can more easily enter the air gap and the radial ventilation slots of the stator by centrifugal force. In addition, ventilation grooves are formed on two sides of the rotor turn conductors, the ventilation grooves are symmetrical, and air in the air gap can enter from one side and flow out from the other side by utilizing the rotation effect of the rotor, and ventilation holes formed on the side face are in communication with the ventilation grooves of the radial oblique cylinder.
In addition, there are three slotted structures at the rotor turn conductors: one is a cuboid groove deviating from a radial center line, the other is a symmetrically connected ventilation groove at two sides of a rotor turn conductor, and the last is a combination structure of the first two forms; the three slotting structures can be alternately distributed in the axial direction of the rotor turn conductors.
While the foregoing description of the embodiments of the present invention has been presented in conjunction with the drawings, it should be understood that it is not intended to limit the scope of the invention, but rather, it should be understood that various changes and modifications could be made by one skilled in the art without the need for inventive faculty, which would fall within the scope of the invention.
Claims (10)
1. A large turbo-generator rotor turn conductor ventilation system structure comprising: a rotor axial ventilation groove (2) axially arranged on the rotor core (1); rotor turn conductors (3) are arranged on the rotor core (1) at intervals, a plurality of radial ventilation grooves (4) are formed in the rotor turn conductors (3), and the radial ventilation grooves (4) are communicated with the rotor axial ventilation grooves (2); a plurality of pairs of symmetrical ventilation grooves (5) are arranged on the rotor turn conductor (3), and the two symmetrical ventilation grooves (5) are communicated with each other.
2. The large steam turbine generator rotor turn conductor ventilation system structure of claim 1, wherein the air flow inlet of the radial ventilation slot (4) is communicated with the rotor axial ventilation slot (2), and the air flow outlet of the radial ventilation slot (4) is positioned on the surface of the rotor turn conductor (3).
3. The large turbo-generator rotor turn conductor ventilation system structure of claim 1, characterized in that the air flow inlet of the radial ventilation slots (4) communicates with the rotor axial ventilation slots (2), and the air flow outlet of the radial ventilation slots (4) communicates with the ventilation channels (5).
4. A large turbo-generator rotor turn conductor ventilation system structure according to claim 2 or 3, characterized in that the central axis of the radial ventilation slots (4) is offset at an angle from the radial direction of the rotor core (1).
5. A large turbo-generator rotor turn conductor ventilation system structure according to claim 4, characterized in that the central axis of the radial ventilation slots (4) is offset at an angle to the plane perpendicular to the axial direction of the rotor core (1).
6. The large turbo-generator rotor turn conductor ventilation system structure of claim 5, characterized in that the radial ventilation slots (4) are cuboid slots.
7. A large turbo generator rotor turn conductor ventilation system structure according to claim 1, characterized in that the rotor turn conductor (3) comprises a winding insulation (6) and an excitation winding (7) provided within the winding insulation (6).
8. A large turbo generator rotor turn conductor ventilation system structure according to claim 1, characterized in that the symmetrical ventilation grooves (5) communicating with each other are grooves along the circumference of the rotor core (1) and perpendicular to the central axis of the rotor core (1), the two grooves being parallel and communicating at the bottom.
9. A turbo-generator rotor comprising a large turbo-generator rotor turn conductor ventilation system structure as claimed in any one of claims 1 to 8.
10. A turbo generator comprising a turbo generator rotor according to claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310717966.6A CN116707191A (en) | 2023-06-16 | 2023-06-16 | Large-scale turbo generator rotor turn conductor ventilation system structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310717966.6A CN116707191A (en) | 2023-06-16 | 2023-06-16 | Large-scale turbo generator rotor turn conductor ventilation system structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116707191A true CN116707191A (en) | 2023-09-05 |
Family
ID=87838934
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310717966.6A Pending CN116707191A (en) | 2023-06-16 | 2023-06-16 | Large-scale turbo generator rotor turn conductor ventilation system structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116707191A (en) |
-
2023
- 2023-06-16 CN CN202310717966.6A patent/CN116707191A/en active Pending
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