CN115313708A - Stator structure and motor in supercritical carbon dioxide power generation system - Google Patents
Stator structure and motor in supercritical carbon dioxide power generation system Download PDFInfo
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- CN115313708A CN115313708A CN202211195335.4A CN202211195335A CN115313708A CN 115313708 A CN115313708 A CN 115313708A CN 202211195335 A CN202211195335 A CN 202211195335A CN 115313708 A CN115313708 A CN 115313708A
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- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 title claims abstract description 94
- 229910002092 carbon dioxide Inorganic materials 0.000 title claims abstract description 47
- 239000001569 carbon dioxide Substances 0.000 title claims abstract description 47
- 238000010248 power generation Methods 0.000 title claims abstract description 40
- 230000002093 peripheral effect Effects 0.000 claims description 39
- 230000000994 depressogenic effect Effects 0.000 claims 1
- 238000009434 installation Methods 0.000 claims 1
- 230000005284 excitation Effects 0.000 abstract description 3
- 230000008676 import Effects 0.000 abstract description 3
- 230000015572 biosynthetic process Effects 0.000 abstract 1
- 238000004891 communication Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005192 partition Methods 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 229910021386 carbon form Inorganic materials 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
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- 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
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/20—Stationary parts of the magnetic circuit with channels or ducts for flow of cooling medium
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- 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
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Wind Motors (AREA)
Abstract
The application discloses stator structure and motor among supercritical carbon dioxide power generation system, stator structure includes: a main body portion, a flow passage, and a baffle. The cavity is acceptd in the main part cavity formation, and the circulation passageway runs through to set up in the main part, and includes first passageway, cushion chamber and second passageway, and the first export of first passageway, cushion chamber and the second import of second passageway communicate in proper order, and the radial extension of main part is followed to first passageway, and the extending direction of second passageway intersects with the extending direction of main part. The baffle protrudes from the inner circumferential surface and extends along the axial direction of the main body part. The circulation channel introduces circumferential working medium airflow in the same direction as the rotation direction of the rotor structure, so that the circumferential velocity gradient near the rotor structure in the accommodating cavity is reduced, the circumferential viscous force of the rotor structure and the wind friction loss of the rotor structure are reduced, the baffle can reduce the average circumferential airflow velocity in the accommodating cavity, the airflow exciting force is reduced, and the airflow excitation instability of the rotor structure can be prevented.
Description
Technical Field
The application relates to the technical field of motors, in particular to a stator structure and a motor in a supercritical carbon dioxide power generation system.
Background
The increase of the single-machine capacity of the generator increases the heat load of the generator, so that the temperature of each component of the generator is increased, the service life and the operation reliability of the motor are influenced, and therefore the problems of ventilation cooling and heating in the motor are the key points of concern. The introduction of cooling air flow can cause the friction heat generation of the rotor and the flowing medium to generate wind friction loss, and the high rotating speed and high density air flow can increase the wind friction loss to reduce the output power of the generator. In a supercritical carbon dioxide Brayton cycle system, the reduction of output power caused by wind abrasion of a motor rotor is an important factor for restricting full-load power generation of a unit, in particular to a low-power turbine generator set which runs coaxially with TAC and at high rotating speed.
Therefore, in order to reduce the wind friction loss and improve the output power of the motor, the stator structure and the motor in the supercritical carbon dioxide power generation system are provided.
Disclosure of Invention
The stator structure and the motor in the supercritical carbon dioxide power generation system provided by the embodiment of the application can reduce the wind friction loss and improve the output power of the motor.
Embodiments of a first aspect of the present application provide a stator structure for use in a supercritical carbon dioxide power generation system installed in an electric machine, comprising:
the main body part comprises an accommodating cavity, an outer peripheral surface and an inner peripheral surface, the accommodating cavity is formed in the main body part in a hollow mode and is used for accommodating a rotor structure of the motor, the outer peripheral surface and the inner peripheral surface are arranged oppositely, the inner peripheral surface surrounds the accommodating cavity, and the inner peripheral surface is used for being arranged at intervals with the rotor structure;
the circulation channel penetrates through the main body part and comprises a first channel, a buffer cavity and a second channel, a first inlet of the first channel is arranged on the outer peripheral surface, a second outlet of the second channel is arranged on the inner peripheral surface, the first outlet of the first channel, the buffer cavity and a second inlet of the second channel are sequentially communicated, the buffer cavity can adjust the flow velocity of a working medium flowing into the buffer cavity from the first channel and guide the working medium to the second channel to flow into the accommodating cavity, the first channel extends along the radial direction of the main body part, and the extension direction of the second channel is intersected with the extension direction of the main body part to be used for introducing a circumferential working medium which is the same as the rotation direction of the rotor structure;
the baffle protrudes out of the inner circumferential surface and extends along the axial direction of the main body part.
According to any one of the preceding embodiments of the first aspect of the present application, the number of the second outlets is plural, and the plural second outlets are arranged at intervals in a circumferential direction of the main body portion.
According to any one of the preceding embodiments of the first aspect of the present application, the number of the baffles is multiple, and the multiple baffles are arranged at intervals along the circumferential direction of the main body part.
According to any one of the preceding embodiments of the first aspect of the present application, the body portion has a first end face and a second end face connecting the outer circumferential face and the inner circumferential face, the first end face and the second end face are arranged opposite to each other in the axial direction, the second outlet is arranged on a side of the baffle plate close to the first end face, a plurality of first end points of the second outlet, which are away from the first end face, are in a first plane, a plurality of second end points of the baffle plate close to the first end face are in a second plane, and the first plane and the second plane are arranged at intervals.
According to any of the preceding embodiments of the first aspect of the present application, a projection of the baffle onto the first plane falls between two adjacent first end points.
According to any one of the preceding embodiments of the first aspect of the present application, the baffle comprises a windward side and a leeward side which are arranged opposite to each other in a circumferential direction of the main body portion, and a minimum distance from the windward side to the first end point is greater than a minimum distance from the leeward side to the first end point.
According to any one of the preceding embodiments of the first aspect of the present application, the baffle includes a connection end connected to the inner circumferential surface and a free end remote from the inner circumferential surface, the free end is configured to be spaced apart from the rotor structure, and a connection line from the connection end to the free end intersects a radial direction of the main body portion.
According to any one of the embodiments of the first aspect of the present application, the direction of the circumferential rotation of the working medium along the inner circumferential surface is the flow direction, the windward side is a concave surface recessed along the flow direction, and the leeward side is a convex surface protruding along the flow direction.
According to any one of the preceding embodiments of the first aspect of the present application, the number of the first channels is multiple, the multiple first channels are arranged at intervals along the circumferential direction of the main body, the buffer cavity is annularly arranged in the main body, and the buffer cavity communicates the multiple second channels and the first channels.
Embodiments of the second aspect of the present application further provide an electric machine, where the electric machine includes a rotor structure and a stator structure in the supercritical carbon dioxide power generation system provided in any embodiment of the first aspect.
Compared with the prior art, the stator structure in the supercritical carbon dioxide power generation system provided by the embodiment of the application comprises: a main body portion, a flow passage, and a baffle. The main body part comprises an accommodating cavity, an outer peripheral surface and an inner peripheral surface, the accommodating cavity is formed in the hollow main body part and used for accommodating a rotor structure of the motor, the outer peripheral surface and the inner peripheral surface are arranged oppositely, and the inner peripheral surface is enclosed to form the accommodating cavity. The circulation passageway runs through and sets up in the main part, and the circulation passageway includes first passageway, cushion chamber and second passageway, and the outer peripheral face is located to the first import of first passageway, and the inner peripheral surface is located to the second export of second passageway, and the first export of first passageway, cushion chamber and the second import of second passageway communicate in proper order, and first passageway extends along the radial of main part, and the extending direction of second passageway intersects with the extending direction of main part. The baffle protrudes from the inner circumferential surface and extends along the axial direction of the main body part. The circulation channel introduces the circumferential working medium airflow which is the same as the rotation direction of the rotor structure, so that the average circumferential speed gradient near the rotor structure in the accommodating cavity can be reduced, the circumferential viscous force of the rotor structure and the wind friction loss of the rotor structure are reduced, and the output power of the motor is improved. The baffle can reduce the average circumferential air velocity in the containing cavity, so that the air flow exciting force is reduced, and the air flow excitation instability of the rotor structure can be prevented.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments of the present application will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic diagram of a stator structure in a supercritical carbon dioxide power generation system according to an embodiment of the present disclosure;
FIG. 2 is a schematic cross-sectional view of a stator structure in another supercritical carbon dioxide power generation system provided in an embodiment of the present application;
FIG. 3 is a schematic diagram of a stator structure in another supercritical carbon dioxide power generation system provided by an embodiment of the present application;
FIG. 4 is a schematic cross-sectional view of a stator structure in a supercritical carbon dioxide power generation system according to an embodiment of the present disclosure;
fig. 5 is a schematic cross-sectional structural diagram of a stator structure in another supercritical carbon dioxide power generation system according to an embodiment of the present application.
Description of reference numerals:
100. a stator structure in a supercritical carbon dioxide power generation system;
1. a main body portion; 11. an accommodating cavity; 12. an outer peripheral surface; 13. an inner peripheral surface; 14. a first end face; 15. a second end face;
2. a flow-through channel; 21. a first channel; 211. a communicating member; 22. a buffer chamber; 23. a second channel; 3. a baffle plate;
x, axial direction; y, radial direction; p1, a first endpoint; p2, a second endpoint; PS, windward side; SS, leeward side;
200. a rotor structure; r, rotation direction.
Detailed Description
Features and exemplary embodiments of various aspects of the present application will be described in detail below. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the present application. It will be apparent, however, to one skilled in the art that the present application may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the present application by illustrating examples thereof. In the drawings and the following description, at least some well-known structures and techniques have not been shown in detail in order to avoid unnecessarily obscuring the present application; also, the dimensions of some of the structures may be exaggerated for clarity. Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.
In the description of the present application, it is to be noted that, unless otherwise specified, "a plurality" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," and the like, indicate an orientation or positional relationship that is merely for convenience in describing the application and to simplify the description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the application. Furthermore, 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.
The directional terms appearing in the following description are directions shown in the drawings and do not limit the specific structure of the embodiments of the present application. In the description of the present application, it is also to be noted that, unless otherwise explicitly specified or limited, the terms "mounted" and "connected" are to be interpreted broadly, e.g., as being either fixedly connected, detachably connected, or integrally connected; can be directly connected or indirectly connected. The specific meaning of the above terms in the present application can be understood as appropriate by one of ordinary skill in the art.
Referring to fig. 1 and fig. 2 together, a stator structure 100 in a supercritical carbon dioxide power generation system according to an embodiment of a first aspect of the present application is configured to be installed in a motor, where the stator structure 100 in the supercritical carbon dioxide power generation system includes: a main body part 1, a flow channel 2 and a baffle 3. The main body part 1 comprises an accommodating cavity 11, an outer peripheral surface 12 and an inner peripheral surface 13, the main body part 1 is hollow to form the accommodating cavity 11, the accommodating cavity 11 is used for accommodating a rotor structure 200 of the motor, the outer peripheral surface 12 and the inner peripheral surface 13 are oppositely arranged, the inner peripheral surface 13 surrounds to form the accommodating cavity 11, and the inner peripheral surface 13 is used for being arranged at intervals with the rotor structure 200. The flow channel 2 penetrates through the main body part 1, the flow channel 2 comprises a first channel 21, a buffer cavity 22 and a second channel 23, a first inlet of the first channel 21 is arranged on the outer peripheral surface 12, a second outlet of the second channel 23 is arranged on the inner peripheral surface 13, the first outlet of the first channel 21, the buffer cavity 22 and the second inlet of the second channel 23 are sequentially communicated, the buffer cavity 22 can adjust the flow velocity of a working medium flowing into the buffer cavity 22 from the first channel 21, and the working medium can be guided to the second channel 23 to flow into the accommodating cavity 11. The first passage 21 extends in the radial direction Y of the main body 1, and the extending direction of the second passage 23 intersects the extending direction of the main body 1. The baffle 3 projects from the inner peripheral surface 13 and extends in the axial direction X of the body 1.
The application provides a stator structure 100 among supercritical carbon dioxide power generation system, the working medium that circulation passageway 2 introduced is supercritical carbon dioxide, and after supercritical carbon dioxide flowed in and accepts chamber 11, rotor structure 200 rotated, drives supercritical carbon dioxide and forms circumference air current, and this circumference air current can reduce near rotor structure 200 average circumference velocity gradient, and then reduces rotor structure 200's circumference viscous force and wind loss of rubbing. The baffle 3 can restrain the air flow exciting force of the working medium introduced into the accommodating cavity 11 from the flow channel 2, so that the air flow exciting instability of the rotor structure 200 can be prevented.
Optionally, the main body 1 is hollow and forms an accommodating cavity 11, the accommodating cavity 11 is used for accommodating the rotor structure 200, and the rotor structure 200 rotates in the accommodating cavity 11.
The flow channel 2 is used for introducing the working medium into the receiving cavity 11 from the axial direction X. The flow channel 2 includes a first channel 21, a buffer chamber 22, and a second channel 23 which are communicated in this order. The first inlet of the first channel 21 is communicated with the working medium source, the first outlet of the first channel 21 is communicated with the buffer cavity 22, the first channel 21 can drive the working medium to flow into the accommodating cavity 11 through the circulation channel 2, and the working medium is buffered in the accommodating cavity 11, so that the flow speed of the working medium is more uniform. The buffer cavity 22 is communicated with a second inlet of the second channel 23, and the working medium is introduced into the accommodating cavity 11 through the second channel 23, so that the average circumferential velocity gradient near the rotor structure 200 is reduced, and further, the circumferential viscous force and the wind friction loss of the rotor structure 200 are reduced.
The first channel 21 is in the same radial direction Y as the main body 1 in order to introduce more working substance. The extending direction of the second channel 23 intersects the extending direction of the main body portion 1 in the same direction as the rotating direction R of the rotor structure 200, so that the same working medium as the rotating direction R of the rotor structure 200 can be introduced. Alternatively, the angle α between the second channel 23 and the radial direction Y of the main body 1 may be 45 degrees, 30 degrees, 15 degrees or other degrees, which is not limited in the present application. The degree of inclination can be suitably selected depending on the aperture of each portion of the flow channel 2 or the number of the flow channels 2. As the angle α of the second passage 23 to the radial direction Y of the main body 1 increases, the viscous force acting on the surface of the rotor structure 200 becomes smaller. For example, when a plurality of flow channels 2 are arranged along the circumferential direction of the main body 1, the amount of the working medium introduced by the flow channels 2 is large, and at this time, the angle between the second channel 23 and the radial direction Y of the main body 1 can be properly reduced. When the bore diameter of the second passage 23 is large, the angle between the second passage 23 and the radial direction Y of the main body 1 can be also appropriately reduced. The extending direction of the baffle 3 intersects with the extending direction of the main body 1, and the intersecting direction is opposite to the rotating direction R of the rotor structure 200.
In order to increase the working quality of the working medium introduced into the containing cavity 11, a plurality of first channels 21 may be provided, and the plurality of first channels 21 may be symmetrically distributed along the radial direction Y of the stator structure 100 in the supercritical carbon dioxide power generation system, so that the working medium introduced into the containing cavity 11 may be more uniform. In an embodiment, the first inlet of the first channel 21 is directly communicated with the external supercritical carbon dioxide working medium source, so that the manufacturing cost of the stator structure 100 in the supercritical carbon dioxide power generation system can be saved.
Referring to fig. 3 and 4, in an embodiment, in order to better introduce the supercritical carbon dioxide, the stator structure 100 in the supercritical carbon dioxide power generation system further includes a communication member 211 communicated with the first inlet of the first channel 21, the communication member 211 is disposed to protrude from the outer circumferential surface 12 of the main body portion 1, and illustratively, the number of the communication members 211 may be four, and the four communication members 211 are equidistantly spaced along the outer circumferential surface 12. The first passage 21 is in communication with an external supercritical carbon dioxide working fluid source via a communication member 211.
Optionally, the buffer chamber 22 further includes a middle partition plate (not shown) and vent holes arranged in an array on the middle partition plate, the middle partition plate divides the buffer chamber 22 into two sub-chambers, and the vent holes communicate the two sub-chambers.
Optionally, the number of the buffer cavities 22 may be multiple, the multiple buffer cavities 22 are arranged at intervals along the circumferential direction of the main body portion 1, and the multiple buffer cavities 22 are arranged in pairs and opposite to each other. The plurality of buffer cavities 22 are symmetrically distributed along the circumferential direction of the main body portion 1, and the buffer cavities 22 which are symmetrically distributed can achieve a better buffer effect.
In some alternative embodiments, the number of the second outlets is plural, and the plural second outlets are arranged at intervals along the circumference of the main body portion 1.
In these alternative embodiments, the plurality of second outlets may be provided at regular intervals in the circumferential direction of the main body portion 1. One circulation channel 2 can correspond one second passageway 23 or a plurality of second passageway 23, and when one circulation channel 2 corresponded a plurality of second passageways 23, the working medium that one circulation channel 2 introduced flowed into after a plurality of second passageways 23 shunts and accepts the chamber 11, not only can cushion the working medium and can also improve the homogeneity of giving vent to anger.
In some alternative embodiments, the number of the baffles 3 is multiple, and multiple baffles 3 are arranged at intervals along the circumference of the main body portion 1.
In these alternative embodiments, it will be appreciated that a plurality of baffles 3 spaced circumferentially around the body portion 1 may better reduce the mean circumferential velocity of the airflow. Along the axial direction X of the stator structure 100 in the supercritical carbon dioxide power generation system, the length of the baffle 3 can be 1/3 of the length of the main body part 1, or the length of the baffle 3 can be increased to be 1/2 of the length of the main body part 1, so that a better blocking effect is achieved. Of course, the length of the baffle 3 in the present application is only exemplary, and the length of the baffle 3 can be selected as required. Along the radial direction Y of the stator structure 100 in the supercritical carbon dioxide power generation system, the width of the baffle 3 can be selected according to actual needs.
In some alternative embodiments, the main body portion 1 has a first end face 14 and a second end face 15 connecting the outer circumferential face 12 and the inner circumferential face 13, the first end face 14 and the second end face 15 are oppositely arranged along the axial direction X, the second outlet is arranged at one side of the baffle 3 close to the first end face 14, a plurality of second outlets are arranged in a first plane away from a first end point P1 of the first end face 14, a plurality of baffles 3 are arranged in a second plane close to a second end point P2 of the first end face 14, and the first plane and the second plane are arranged at intervals.
In these alternative embodiments, the first plane where the plurality of second outlet first end points P1 are located and the second plane where the plurality of baffle plates 3 are located are spaced apart from each other along the axial direction X, and the working medium introduced by the second channel 23 contacts the baffle plates 3 after moving in the direction close to the second end face 15 for a certain period of time. Alternatively, the distance between the first plane and the second plane may be 3-6mm, and the values in this application are only exemplary, and the appropriate distance may be selected according to actual needs.
It will be understood that the direction from the first end face 14 to the second end face 15 may be an axial X inlet direction of the working medium, and the first channel 21 may be a radial Y inlet direction of the working medium. The second outlet is arranged closer to the first end face 14 than the baffle 3 in the axial direction X. In the radial direction Y, the baffle 3 is disposed downstream of the second outlet, and the baffle 3 can reduce the average circumferential airflow velocity to inhibit the rotor structure 200 from airflow excitation instability. The stator structure 100 in the supercritical carbon dioxide power generation system provided by the invention can meet the requirements of reducing the wind friction loss of the rotor structure 200 and the stable operation of the rotor structure 200, provides effective guarantee for the full load output and the long-term reliable operation of the supercritical carbon dioxide Brayton cycle power generation system, and has very important engineering significance.
Referring to fig. 5, in some alternative embodiments, the projection of the baffle 3 on the first plane falls between two adjacent first end points P1.
In these alternative embodiments, the baffles 3 may be uniformly spaced on the inner circumferential surface 13, and the extension line of the baffles 3 may coincide with the midpoint of the connecting line of the two adjacent first endpoints P1 along the axial direction X.
In some alternative embodiments, the baffle 3 includes a windward side PS and a leeward side SS which are oppositely arranged along the circumferential direction of the main body portion 1, and the minimum distance from the windward side PS to the first end point P1 is greater than the minimum distance from the leeward side SS to the first end point P1.
In these alternative embodiments, the windward side PS is the same plane as the working medium flow direction, and the leeward side SS is the opposite plane to the working medium flow direction. The windward side PS is shorter than the leeward side SS to the minimum distance from the first end point P1, i.e. the projection of the baffle 3 on the first plane does not fall on the midpoint of the adjacent two first end points P1. The second channels 23 are inclined in the direction of rotation R of the rotor structure 200 to generate the same circumferential airflow as the direction of rotation R of the rotor structure 200, i.e. the windward side PS of the baffle 3 will be closer to the second channels 23 than the leeward side SS. For example, the minimum distance from the windward side PS to the first end point P1 may be set to be greater than the minimum distance from the leeward side SS to the first end point P1, so as to reduce the stroke of the working medium flowing out of the second outlet before being blocked by the baffle 3.
In some alternative embodiments, the baffle 3 includes a connecting end connected to the inner circumferential surface 13 and a free end away from the inner circumferential surface 13, the free end is arranged to be spaced apart from the rotor structure 200, and a line connecting the connecting end to the free end intersects with the radial direction Y of the main body portion 1.
In these alternative embodiments, the free end may be spaced from the rotor structure 200 by 2-8mm in the radial direction Y, and the baffle 3 does not contact the rotor structure 200 and further does not hinder the rotation of the rotor structure 200. The connecting line from the connecting end to the free end is inclined with the radial direction Y to form a deflection angle, the intersecting angle between the baffle 3 and the radial direction Y and the rotating direction R of the rotor structure 200 are smaller than 90 degrees, namely the inclined direction of the baffle 3 is opposite to the rotating direction R of the rotor structure 200.
In some alternative embodiments, the direction of the working medium rotating along the circumferential direction of the inner circumferential surface 13 is the flow direction, the windward side PS is a concave surface recessed along the flow direction, and the leeward side SS is a convex surface protruding along the flow direction.
In these alternative embodiments, the working medium is introduced into the receiving cavity 11 and then rotates in the circumferential direction along the rotation direction R of the rotor structure 200. The windward side PS is a concave surface recessed in the flow direction, and the leeward side SS is a convex surface protruding in the flow direction, so that the effect of blocking circumferential movement of airflow is better, and the stability of the rotor structure 200 is better.
In some alternative embodiments, the number of the first passages 21 is multiple, the multiple first passages 21 are arranged at intervals along the circumferential direction of the main body portion 1, the buffer cavity 22 is annularly arranged in the main body portion 1, and the buffer cavity 22 communicates the multiple second passages 23 and the first passages 21.
In these optional embodiments, the flow channel 2 includes a plurality of first channels 21, a plurality of second channels 23 and a buffer cavity 22, the plurality of first channels 21 and the plurality of second channels 23 are arranged at intervals along the circumference of the main body portion 1, and the buffer cavity 22 is annularly arranged in the main body portion 1, so that the main body portion 1 forms a hollow cavity, thereby enabling the working medium to achieve better buffering and flow rate balancing effects.
Embodiments of the second aspect of the present application further provide an electric machine, which includes a stator structure in the supercritical carbon dioxide power generation system as provided in any embodiment of the first aspect of the present application and a rotor structure.
The motor can be used in the supercritical carbon dioxide system, and the motor still includes the pivot, and pivot and rotor structure circumference relatively fixed, and the pivot passes through the bearing and rotates the stator structure who connects in the supercritical carbon dioxide power generation system, and rotor structure and pivot can rotate for the stator structure among the supercritical carbon dioxide power generation system in step. Stator core is installed to the stator structure among the supercritical carbon dioxide power generation system, and rotor core is installed to the rotor structure, and when circular telegram work, stator core and rotor core produce the moment of torsion, drive pivot and rotor structure and rotate output power. The embodiment of the second aspect of the present application has the beneficial effects of the embodiment of the first aspect of the present application, and details are not repeated here.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
In addition, the term "and/or" herein is only one kind of association relationship describing an associated object, and means that there may be three kinds of relationships, for example, a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
It should be understood that in the embodiment of the present application, "B corresponding to a" means that B is associated with a, from which B can be determined. It should also be understood that determining B from a does not mean determining B from a alone, but may be determined from a and/or other information.
While the invention has been described with reference to specific embodiments, the scope of the invention is not limited thereto, and those skilled in the art can easily conceive various equivalent modifications or substitutions within the technical scope of the invention, and these modifications or substitutions are intended to be included in the scope of the invention. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (10)
1. A stator structure in a supercritical carbon dioxide power generation system, for installation in an electric machine, comprising:
the motor comprises a main body part, a stator and a rotor, wherein the main body part comprises an accommodating cavity, an outer peripheral surface and an inner peripheral surface, the accommodating cavity is formed in the hollow part of the main body part and is used for accommodating a rotor structure of the motor, the outer peripheral surface and the inner peripheral surface are oppositely arranged, the inner peripheral surface surrounds the accommodating cavity, and the inner peripheral surface is used for being arranged at intervals with the rotor structure;
the circulation channel penetrates through the main body part and comprises a first channel, a buffer cavity and a second channel, a first inlet of the first channel is arranged on the outer peripheral surface, a second outlet of the second channel is arranged on the inner peripheral surface, the first outlet of the first channel, the buffer cavity and the second inlet of the second channel are sequentially communicated, the buffer cavity can adjust the flow rate of a working medium flowing into the buffer cavity from the first channel and can guide the working medium to the second channel to flow into the accommodating cavity, the first channel extends along the radial direction of the main body part, and the extension direction of the second channel is intersected with the extension direction of the main body part so as to be used for introducing a circumferential working medium in the same direction as the rotation direction of the rotor structure;
and the baffle protrudes out of the inner peripheral surface and extends along the axial direction of the main body part.
2. The stator structure in the supercritical carbon dioxide electric power generation system according to claim 1 is characterized in that the number of the second outlet is plural, and the plural second outlets are arranged at intervals along the circumferential direction of the main body part.
3. The stator structure of a supercritical carbon dioxide electric power generation system according to claim 1 is characterized in that the number of the baffle plates is plural, and the plural baffle plates are arranged at intervals in the circumferential direction of the main body part.
4. The stator structure in a supercritical carbon dioxide electric power generation system according to claim 3 is characterized in that the main body portion has a first end face and a second end face connecting the outer peripheral face and the inner peripheral face, the first end face and the second end face are disposed oppositely in the axial direction, the second outlet is disposed on a side of the baffle plate close to the first end face, a first end point of the plurality of second outlet facing away from the first end face is in a first plane, a second end point of the plurality of baffle plates close to the first end face is in a second plane, and the first plane and the second plane are disposed at an interval.
5. The stator structure of the supercritical carbon dioxide electric power generation system according to claim 4 is characterized in that the projection of the baffle plate on the first plane falls between two adjacent first end points.
6. The stator structure in the supercritical carbon dioxide electric power generation system according to claim 4 is characterized in that the baffle comprises a windward side and a leeward side which are arranged oppositely along the circumferential direction of the main body part, and the minimum distance from the windward side to the first end point is larger than the minimum distance from the leeward side to the first end point.
7. The stator structure of supercritical carbon dioxide electric power generation system according to claim 6 is characterized in that the baffle plate comprises a connection end connected with the inner peripheral surface and a free end far away from the inner peripheral surface, the free end is used for being arranged at a distance from the rotor structure, and a connection line from the connection end to the free end is arranged to intersect with the radial direction of the main body part.
8. The stator structure of the supercritical carbon dioxide electric power generation system according to claim 6 is characterized in that the direction of the working medium rotating along the circumferential direction of the inner circumferential surface is a flow direction, the windward side is a concave side depressed along the flow direction, and the leeward side is a convex side raised along the flow direction.
9. The stator structure in the supercritical carbon dioxide power generation system according to any one of claims 1 to 8 is characterized in that the number of the first passages is plural, the plural first passages are arranged at intervals along the circumferential direction of the main body part, the buffer cavity is arranged around the main body part, and the buffer cavity communicates the plural second passages and the first passages.
10. An electrical machine comprising a rotor structure and a stator structure in a supercritical carbon dioxide power generation system according to any one of claims 1-9.
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| CN115313708B (en) | 2022-12-20 |
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