WO2014054830A1

WO2014054830A1 - Cooling system and cooling method for generator

Info

Publication number: WO2014054830A1
Application number: PCT/KR2012/009328
Authority: WO
Inventors: 박병식; 이시우; 김혁주; 임용훈; 이재용; 이동현; 박화춘; 정대헌; 김용은
Original assignee: 한국에너지기술연구원
Priority date: 2012-10-04
Filing date: 2012-11-07
Publication date: 2014-04-10
Also published as: KR101407948B1; KR20140044425A

Abstract

The purpose of the present invention is to enhance cooling performance of a generating device by facilitating cooling by a cooling fluid, and a cooling system for a generator according to the present invention comprises: a rotary shaft which is connected to a turbine and rotates with the turbine; a rotor which is coupled to the middle portion of the rotary shaft so as to rotate with the rotary shaft; a stator having a cylinder shape which is positioned outside of the rotation radius of the rotor; and a housing which forms a cooling flow channel between the cooling fluid inlet port and the cooling fluid discharge port, and which comprises a cooling fluid inlet port into which the cooling fluid is introduced and a cooling fluid discharge port for discharging the cooling fluid, wherein the stator is formed so that the inner circumferential surface to the outer circumferential surface of the stator is penetrated, so that the cooling fluid that is introduced to a space between the stator and the rotor flows through the stator toward the cooling fluid discharge port, and wherein the stator comprises a sub-cooling flow path comprising one portion of the cooling flow path.

Description

Generator cooling system and cooling method

The present invention relates to a generator cooling system and a cooling method, and more particularly, to a generator cooling system and a generator cooling method for improving the cooling performance by smoothly flowing the cooling fluid using the surface rotational speed of the rotor. .

Turbine generators generally comprise a rotating shaft, a turbine for rotating the rotating shaft, a rotor coupled to the rotating shaft, and a stator disposed outside the rotating radius of the rotor.

In a high speed turbine-based power generation device, a large amount of heat is generated by electrical resistance and friction between components due to electromotive force generation in a housing including a rotor and a stator. Such heat generation may cause deformation of components inside the generator, and on the other hand, may increase the electrical resistance of conductive components such as coils, leading to a decrease in power generation efficiency.

As one method of cooling to solve this heat generation problem, it may be considered to perform cooling by flowing a cooling fluid into the housing. 1 is a conceptual diagram illustrating a cooling method of forming a cooling flow path inside the housing to directly flow cooling fluid between i) the stator and the housing and ii) between the stator and the rotor. As shown in Fig. 1, when the cooling fluid flows through the cooling flow path, i) the cooling fluid flows smoothly between the stator and the housing due to the pressure difference between the outlet and the housing. However, ii) there is a problem in that the space formed between the stator and the rotor has the same pressure at both ends of the space so that the cooling fluid does not form a smooth flow, and as a result, the cooling performance is limited.

The present invention devised to solve the above problems is an object of the present invention to provide a generator cooling system and a cooling method for improving the cooling performance by smoothing the cooling of the cooling fluid.

Generator cooling system according to the present invention, the rotary shaft is connected to the turbine and rotates together with the turbine, the rotor is rotatably coupled with the rotary shaft in the center of the rotary shaft, the cylindrical shape located outside the rotation radius of the rotor And a cooling fluid inlet through which the cooling fluid is introduced, and a cooling fluid outlet through which the cooling fluid is discharged, and comprising a housing defining a cooling passage between the cooling fluid inlet and the cooling fluid outlet.

Here, the stator penetrates from the inner circumferential surface of the stator to the outer circumferential surface, such that the cooling fluid introduced into the space between the stator and the rotor can flow through the stator to the cooling fluid outlet side, and the cooling flow path It characterized in that it comprises a sub-cooling passage forming a path of.

The sub cooling channel may be formed of at least one through hole, or may be formed in a shape in which a longitudinal cross section of the central portion of the stator is cut and spaced apart from each other.

On the other hand, the sub-cooling passage is provided with a plurality of vanes interconnecting the cut longitudinal section, the vane is characterized in that the interval becomes wider toward the outer edge of the longitudinal section.

The housing may include an outer cooling channel positioned at an outer circumference of the outer circumferential surface of the stator to allow cooling fluid flowing through the cooling channel to flow through the outer stator to the cooling fluid outlet.

On the other hand, the stator is characterized in that it further comprises a cooling groove which is formed in the longitudinal direction of the cylindrical shape to allow the cooling fluid to flow into the stator to form a part of the cooling passage.

The cooling groove may be formed by recessing a portion of the outer circumferential surface of the stator to the inside, or the cooling groove may be formed by passing a portion of the surface between the outer circumference and the inner circumference of the stator in the longitudinal direction of the cylindrical shape.

On the other hand, the cooling fluid is characterized by consisting of a working fluid discharged from the turbine, the cooling fluid inlet is characterized in that connected to the turbine outlet.

In addition, the generator cooling system according to another embodiment of the present invention, a rotary shaft connected to the turbine and rotated together with the turbine is coupled to the rotor rotatably coupled with the rotary shaft in the center of the rotary shaft, the outer radius of rotation of the rotor A pair of stators having a cylindrical shape which are disposed at and spaced apart from each other on both sides of the center of the rotor, and a cooling fluid inlet through which cooling fluid is introduced, and a cooling fluid outlet through which cooling fluid is discharged. And a housing defining a cooling passage between the inlet and the cooling fluid outlet.

Here, the spaces spaced apart from each other of the pair of stators allow the cooling fluid introduced into the space between the stator and the rotor to flow through the space between the stators and to the cooling fluid outlet side, and the cooling flow path Characterized in forming a path of the.

In addition, a plurality of vanes fixed to the housing and extending toward the rotor are provided in the spaced apart space, and the vanes are widened in intervals toward the outer corner of the annular cooling space.

On the other hand, the vane is fixed to the housing is characterized in that an annular cooling fluid converging portion is provided so that the cooling fluid flocked between the vanes can escape to the cooling fluid outlet.

The stator may be formed in the longitudinal direction of the cylindrical shape, and may further include a cooling groove that forms a path of the cooling channel by allowing a cooling fluid to flow into the stator.

On the other hand, the cooling groove is characterized in that a portion of the outer peripheral surface of the stator is formed recessed inward.

In addition, the cooling groove is characterized in that a part of the surface between the outer peripheral surface and the inner peripheral surface of the stator is formed in the longitudinal direction of the cylindrical shape.

On the other hand, the generator cooling method according to the present invention is a generator cooling method for cooling the inside of the housing using a cooling fluid, the cooling fluid is introduced through the cooling fluid inlet is located on one side or both sides of the housing to the center of the housing A first cooling step flowing through a subsequent cooling flow path, a second cooling step in which the cooling fluid flows through a space between a cylindrical stator disposed at the center of the housing and a rotor located inside the stator, and the stator And third cooling fluid flowing into the space between the rotor and the rotor through the sub cooling passage formed through the outer and inner circumference of the stator by centrifugal force by the rotation of the rotor. Step, the cooling fluid passed through the third cooling step is transferred to the condenser That is, including a fourth cooling step is discharged to the condenser through the cooling fluid outlet is characterized in that to cool the interior of the housing.

Here, the sub cooling passage is characterized by consisting of at least one through hole.

In addition, the sub cooling flow path is characterized in that the longitudinal cross-section of the central portion of the stator is formed to be spaced apart from each other.

The second cooling step may further include a second-first cooling step in which cooling fluid is introduced into the outer cooling channel located in the housing of the outer circumferential surface of the stator and passing from the cooling channel through the outer circumferential surface of the stator to the cooling fluid outlet. The fourth cooling step may further include a fourth cooling step of discharging the cooling fluid that has passed through the second cooling step to the condenser through the cooling fluid discharge port.

On the other hand, the second cooling step further comprises a step 2-2 of the cooling fluid flows into the cooling groove formed in the longitudinal direction of the cylindrical shape of the stator to form a part of the cooling passage, the fourth cooling step is the And a second cooling step of discharging the cooling fluid that has passed through the second cooling step to the condenser through the cooling fluid discharge port.

The cooling groove may be formed by recessing a portion of the outer circumferential surface of the stator inwardly, or by forming a portion between the outer circumferential surface and the inner circumferential surface of the stator to penetrate in the longitudinal direction of the cylindrical shape.

On the other hand, the generator cooling method according to another embodiment of the present invention, a generator cooling method for cooling the inside of the housing using a cooling fluid, the cooling fluid is introduced through the cooling fluid inlet is located on one side or both sides of the housing The first cooling step flows through the cooling passage leading to the center of the housing, the cooling fluid is introduced through the space between the pair of cylindrical stator and the rotor disposed in the center of the housing and spaced apart from each other In the second cooling step, the cooling fluid introduced into the space between the stator and the rotor forms a flow toward the outside of the stator through the spaced space between the stators by the centrifugal force by the rotation of the rotor Cooling fluid in which the cooling fluid passed through the cooling step and the third cooling step to the condenser And cooling the inside of the housing, including a fourth cooling step discharged to the condenser through an outlet.

Here, a plurality of vanes fixed to the housing and extending toward the rotor are provided in the spaced space of the third cooling step, and the vanes are widened in intervals toward the outer sides of the annular cooling space. do.

The vane-fixed housing may be provided with an annular cooling fluid converging portion so that the cooling fluid driven between the vanes can escape to the cooling fluid outlet.

On the other hand, the second cooling step further includes a second-1 cooling step is located in the housing of the outer peripheral surface of the stator and the cooling fluid flows into the outer cooling passage from the cooling passage through the stator outer peripheral surface to the cooling fluid discharge port. The fourth cooling step may further include a fourth cooling step of discharging the cooling fluid that has passed through the second cooling step to the condenser through the cooling fluid discharge port.

The second cooling step may further include steps 2-2 in which a cooling fluid flows into a cooling groove formed in a cylindrical length direction of the stator to form a part of the cooling flow path, and the fourth cooling step includes: And a second cooling step of discharging the cooling fluid, which has been passed through the second cooling step, to the condenser through the cooling fluid discharge port.

The present invention has an effect of improving the cooling performance of the generator by smoothly flowing the cooling fluid flowing between the stator and the rotor in cooling the inside of the generator using the cooling fluid. More specifically, by forming an additional flow path between the stator and the rotor between the stator and the housing, the flow of cooling fluid introduced between the stator and the rotor smoothly by utilizing the pressure difference and the centrifugal force caused by the rotation of the rotor. There is an effect of increasing the cooling performance.

In addition, the cooling performance can be further improved by forming a cooling groove in the stator to allow the cooling fluid to flow therein.

In addition, it is possible to further improve the cooling performance of the generator by providing a vane to further strengthen the flow toward the outside of the stator.

In addition, by utilizing the working fluid as a cooling fluid, it is possible to solve the problem of additionally providing a complicated cooling flow path due to the use of a separate cooling fluid.

1 is a conceptual diagram showing a problem of the conventional cooling method.

Figure 2 corresponds to the main cross-sectional view showing the main configuration and the flow of cooling fluid of the generator cooling system according to an embodiment of the present invention.

3 is a longitudinal cross-sectional view showing the connection relationship between the stator and the housing, and the sub cooling flow path and the vane of the generator cooling system according to an embodiment of the present invention.

Figure 4 corresponds to the main cross-sectional view showing the main configuration of the generator cooling system according to an embodiment of the present invention.

5 is a cross-sectional view of a stator and a flow diagram illustrating cooling fluid flow in a generator cooling system according to one embodiment of the invention.

6 is a perspective view illustrating a stator including a sub cooling channel according to an exemplary embodiment of the present invention.

7 is a perspective view showing a stator including a cooling groove according to an embodiment of the present invention.

8 is a flow chart showing the cooling fluid flow of the generator cooling system according to an embodiment of the present invention and a cross-sectional view showing the stator is formed with vanes and cooling grooves.

9 is a perspective view illustrating a stator in which a sub cooling space, a vane, and a cooling groove are formed according to an embodiment of the present invention.

Fig. 10 corresponds to a main portion transverse cross-sectional view showing the main configuration of a generator cooling system according to an embodiment of the present invention.

11 is a cross-sectional view showing a flow chart showing a cooling fluid flow of a generator cooling system provided with a pair of stators and a stator having a cooling groove according to an embodiment of the present invention.

FIG. 12 corresponds to a perspective view of a main portion showing a pair of spaced apart stators and a housing and vanes installed in the housing of the generator cooling system according to an embodiment of the present invention.

Figure 13 corresponds to a perspective view showing a stator with a cooling groove formed in accordance with an embodiment of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In adding reference numerals to the components of the following drawings, it is determined that the same components as possible, even if displayed on the other drawings as possible, and unnecessarily obscure the subject matter of the present invention Detailed descriptions of well-known functions and configurations will be omitted.

Each embodiment of the present invention uses the cooling fluid to cool the inside of the generator housing 10, thereby smoothing the flow of the cooling fluid flowing between the stator 14 and the rotor 12, thereby cooling the generator. Improving performance is a common feature. More specifically, an additional flow path between the stator 14 and the rotor 12 (hereinafter referred to as the inside of the stator) is directed between the stator 14 and the housing 10 (hereinafter referred to as the outside of the stator). By forming a, it is common to smooth the flow of the cooling fluid introduced into the stator by using the centrifugal force according to the pressure difference between the inside and the outside and the rotation of the rotor 12.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Figure 2 corresponds to the main cross-sectional view showing the main configuration of the generator cooling system according to an embodiment of the present invention. As shown in FIG. 2, a generator cooling system according to an exemplary embodiment of the present invention includes a rotating shaft 11, a rotor 12, a stator 14, and a housing 10.

The rotary shaft 11 is connected to the turbine 20 to rotate together with the turbine 20, the rotor 12 is coupled to the central portion of the rotary shaft 11 to be rotatable with the rotary shaft (11). . In addition, the stator 14 has a cylindrical shape located outside the rotation radius of the rotor 12. Similar to the general stator 14, the cylindrical inner circumferential surface 16 is provided with a coil 13 winding portion for winding the coil 13.

In addition, the housing 10 includes a cooling fluid inlet 35 through which the cooling fluid is introduced and a cooling fluid outlet 34 through which the cooling fluid is discharged, and between the cooling fluid inlet 35 and the cooling fluid outlet 34. The cooling flow path 33 is formed in this. Here, the cooling flow path 33 is connected to the cooling fluid outlet 34 from the cooling fluid inlet 35, and is a concept including all the flow path of the cooling fluid flows in the housing 10.

In addition, the stator 14 includes a sub cooling passage 36 formed therethrough from the inner circumferential surface 16 of the stator 14 to the outer circumferential surface 17. The sub cooling passage 36 allows the cooling fluid introduced into the space between the stator 14 and the rotor 12 to flow through the stator 14 toward the cooling fluid outlet 34. , And forms a path of the cooling channel 33. By providing such a sub cooling channel 36, the cooling fluid can flow smoothly from the inside of the stator to the outside thereof. This is because the outside of the stator is formed at a lower pressure than the inside adjacent to the cooling fluid outlet 34. As the rotor 12 rotates, a rotational flow due to viscosity of the cooling fluid or friction with the rotor 12 is generated, and a flow toward the outside of the stator is developed by the centrifugal force of the rotational flow. As a result, since the cooling fluid introduced into the inside of the stator may escape to the outside thereof, a smooth flow of the cooling fluid may be formed inside the stator.

On the other hand, as shown in Figure 2, the cooling fluid introduced through the cooling fluid inlet 35 flows to the cooling flow path 33, part of the outer cooling path 38, the other part of the stator 14 ) Flows into the space between the rotor 12 and the stator 14. As described above, the cooling fluid introduced into the stator 14 flows to the outside of the stator 14 through the sub cooling flow passage 36, and the cooling fluid and cooling flowed into the outer cooling passage 38. Joined by the fluid converging portion 39 is discharged to the condenser through the cooling fluid outlet 34. Condenser herein means a condenser in a general Rankine cycle.

Meanwhile, as illustrated in FIG. 6, the sub cooling passage 36 may include at least one through hole, or as illustrated in FIG. 9, the longitudinal cross-sections of the central parts of the stator 14 may be cut and spaced apart from each other. May be taken into account.

As in the latter case, when the sub cooling passage 36 is provided in a form in which the longitudinal cross-section of the central portion of the stator 14 is separated from each other, as shown in FIGS. 3, 8 and 9, the sub cooling passage ( 36 may be provided with a plurality of vanes 37 for interconnecting the cut longitudinal section. In addition, the vanes 37 may be formed such that the gap becomes wider toward the outer edge of the longitudinal section so as to cause a pressure difference between the inlet and the outlet according to the rotational flow by performing the same role as the diffuser.

Meanwhile, as shown in FIGS. 9 and 13, the stator 14 is formed in the cylindrical longitudinal direction to allow a cooling fluid to flow into the stator 14 to partially flow the cooling passage 33. It is preferable that the cooling groove further comprises. By cooling the inside of the stator 14 directly, the cooling effect can be increased, which is also preferable in terms of smoothing the flow of the cooling fluid.

The cooling groove is formed by recessing a portion of the outer circumferential surface 17 of the stator 14 inwardly, as shown in FIG. 13, or the outer circumferential surface of the stator 14, as shown in FIG. 9. It is conceivable that some surfaces between the 17 and the inner circumferential surface 16 penetrate in the longitudinal direction of the cylindrical shape.

On the other hand, the cooling fluid of the present invention may be made of a separate cooling fluid different from the working fluid, or both consisting of the working fluid discharged from the turbine 20. In the latter case, the cooling fluid inlet 35 is preferably connected to the turbine outlet 32, in which case the cooling fluid inlet 35 and the turbine outlet 32 correspond to the same configuration.

Meanwhile, another embodiment of the generator cooling system according to the present invention provides a pair of mutually spaced stators 14 instead of a single stator 14 so that spaces spaced from each other are separated from the sub cooling passages 36. Characterized in that to perform the same role. Hereinafter, the present embodiment will be described in detail with reference to the accompanying drawings. In addition, description of the same parts as in the above-described embodiment in the working relationship and effects will be omitted.

10 corresponds to a cross-sectional view showing the main configuration of the generator cooling system according to the present embodiment, and FIG. 11 corresponds to a flowchart showing the flow of cooling fluid.

As shown in Figures 10 and 11, the generator cooling system according to an embodiment of the present invention comprises a rotary shaft 11, a rotor 12, a stator 14 and a housing 10. Here, the configuration of the rotary shaft 11, the rotor 12 is the same as the embodiment described above.

The stator 14 according to the present embodiment is provided in pairs, and is positioned at an outer radius of the rotation radius of the rotor 12 and spaced apart from each other on both sides of the center of the rotor 12. In addition, the housing 10 according to the present embodiment includes a cooling fluid inlet 35 through which cooling fluid is introduced and a cooling fluid outlet 34 through which the cooling fluid is discharged. The point of forming the cooling flow path 33 between the 34 is the same as the above-mentioned embodiment, but the detail difference is demonstrated below.

In this embodiment, the spaces spaced apart from each other by the pair of stators 14 play the same role as the sub cooling passage 36. That is, the cooling fluid introduced into the space between the stator 14 and the rotor 12 may flow through the space between the stator 14 and toward the cooling fluid outlet 34, and the cooling flow path It is to form a path of (33).

In the spaced space, as illustrated in FIG. 12, a plurality of vanes 37 fixed to the housing 10 and extending toward the rotor 12 are provided, and the vanes 37 are disposed in the vanes 37. It is preferable that it is formed so that the space | interval becomes wider toward the outer side of the annular cooling space.

The vanes 37 in the present embodiment will be different from the above-described embodiment in that the vanes 37 are installed in the housing 10.

Meanwhile, in the housing 10 to which the vanes 37 are fixed, an annular cooling fluid converging portion 39 is provided so that cooling fluids collected between the vanes 37 can escape to the cooling fluid outlet 34. It is desirable to. As shown in FIG. 12, the annular cooling fluid converging portion 39 may be formed by recessing the inner surface of the housing to which the vane is fixed in an annular shape. Meanwhile, in order to achieve the same purpose, it may be considered to provide the cooling fluid outlet 34 to be connected between each vane 37 by the number of vanes 37.

In addition, as in the above-described embodiment, the stator 14 is formed in the longitudinal direction of the cylindrical shape, and allows a cooling fluid to flow into the stator 14 to form one path of the cooling flow path 33. The provision of a cooling groove may be considered. In addition, the cooling fluid may reflect the working fluid discharged from the turbine 20.

On the other hand, the accompanying drawings show a generator including a pair of turbines 20 disposed opposite, this is only a preferred embodiment, the generator cooling system according to the present invention can be applied to the case of a single turbine.

On the other hand, in general turbines, including steam turbines, due to the inherent nature of all mechanisms from the flow of the working fluid, the turbine back pressure through which the working fluid is introduced is made higher than the turbine front pressure through which the working fluid is discharged. Due to the pressure difference between the front and the rear of the turbine, the axial load is generated in the turbine front direction according to the pressure difference. In a typical power generation apparatus, in order to support such a circumference generated in a turbine, a thrust bearing perpendicular to the axial direction of a rotating shaft connected to the turbine or a ball bearing sharing an axial load is provided. Is common. However, if excessive aberration occurs, damage caused by the entire friction of the turbine and the generator due to the increased friction of the bearings, even the bearings, causes a great loss. Therefore, in order to fundamentally prevent such breakage problems, a need for structurally canceling the axial load is required. In particular, in the case of using the above-described thrust bearing or ball bearing, but a steam bearing (Air-bearing or Gas-bearing) having a low range of supporting loads, the problem of breakage becomes more serious.

Therefore, in order to solve such a problem, it may be considered to arrange the turbine 20 in pairs so that the turbine outlets 32 face each other so as to face each other. In this case, it is because the axial load generated by each turbine 20 can mutually cancel each other structurally.

Hereinafter, an embodiment of a generator cooling method according to the present invention will be described.

Generator cooling method according to the present invention relates to a generator cooling method for cooling the inside of the housing 10 by using a cooling fluid. Generator cooling method according to the present embodiment comprises the following first cooling step to the fourth cooling step.

First, in the first cooling step, the cooling fluid flows through the cooling channel 33 flowing through the cooling fluid inlet 35 positioned at one side or both sides of the housing 10 to the center of the housing 10. Corresponds to the steps.

The second cooling step corresponds to a step in which the cooling fluid flows through a space between the cylindrical stator 14 disposed at the center of the housing 10 and the rotor 12 located inside the stator. do.

In the third cooling step, the cooling fluid introduced into the space between the stator 14 and the rotor 12 is the outer circumferential surface 17 of the stator 14 by centrifugal force caused by the rotation of the rotor 12. And a sub cooling flow passage 36 formed through the inner circumferential surface 16 to form a flow directed toward the outside of the stator 14.

Finally, the fourth cooling step corresponds to the step of discharging the cooling fluid having passed through the third cooling step into the condenser through the cooling fluid outlet 34 leading to the condenser.

Here, each of the cooling step is attached to the ordinal number of the first to the fourth based on the flow of the cooling fluid for convenience. Thus, each step may not necessarily be performed in a temporal order.

On the other hand, the sub cooling passage 36 may be formed of at least one through hole, or the central longitudinal cross-section of the stator 14 is cut to form a spaced apart from each other.

In addition, the sub-cooling passage 36 is provided with a plurality of vanes 37 interconnecting the cut end surfaces, and the vanes 37 are preferably provided so as to have a wider interval toward the outer side of the longitudinal section. .

On the other hand, the second cooling step is located in the housing 10 of the outer circumferential surface 17 of the stator 14, passing through the outer circumferential surface 17 of the stator 14 from the cooling passage 33, the cooling fluid outlet 34 Preferably, the cooling fluid is further provided with a second first cooling step into which the cooling fluid flows into the outer cooling channel 38 leading to the fourth cooling step. It is preferable to further include a 4-1 cooling step to discharge to the condenser through 34.

The second cooling step may further include steps 2-2 in which a cooling fluid flows into a cooling groove formed in a cylindrical length direction of the stator 14 to form a part of the cooling channel 33. Do.

The fourth cooling step may further include a 4-2 cooling step of discharging the cooling fluid that has passed through the second-2 cooling step to the condenser through the cooling fluid discharge port.

Here, the cooling groove is formed by recessing a part of the outer circumferential surface 17 of the stator 14 inwardly, or a portion of the surface between the outer circumferential surface 17 and the inner circumferential surface 16 of the stator 14 has a cylindrical shape. It may be considered to be formed penetrating in the longitudinal direction.

The cooling fluid may consist of a working fluid discharged from the turbine 20, in which case the cooling fluid inlet 35 is preferably connected to the turbine outlet 32.

Meanwhile, another embodiment of the generator cooling method according to the present invention provides a pair of mutually spaced stators 14 instead of a single stator 14 so that the spaces spaced from each other are separated from the sub cooling flow path 36. The difference is that they play the same role.

Generator cooling method for cooling the inside of the housing 10 by using the cooling fluid according to the present embodiment comprises the following first cooling step to the fourth cooling step.

In the second cooling step, the cooling fluid is introduced through a space between a pair of cylindrical stators 14 and the rotor 12 disposed at the center of the housing 10 and spaced apart from each other. Corresponds to

In the third cooling step, the cooling fluid introduced into the space between the stator 14 and the rotor 12 is spaced apart from the stator 14 by centrifugal force caused by the rotation of the rotor 12. Corresponding to the step of forming a flow toward the outside of the stator 14 through the space.

Meanwhile, a plurality of vanes 37 fixed to the housing 10 and extending toward the rotor 12 are provided in the spaced space of the third cooling step, and the vanes 37 are the annular cooling space. It is preferable to arrange the gap so that the interval becomes wider toward the outer shell of the.

In the housing 10 to which the vanes 37 are fixed, an annular cooling fluid converging portion 39 is provided so that cooling fluids collected between the vanes 37 can escape to the cooling fluid outlet 34. desirable.

The second cooling step is located in the housing 10 of the outer circumferential surface 17 of the stator 14 and passes through the outer circumferential surface 17 of the stator 14 from the cooling passage 33 to the cooling fluid outlet 34. And a second first cooling step in which a cooling fluid flows into the outer cooling channel 38 leading to the fourth cooling step, wherein the fourth cooling step receives the cooling fluid through the second first cooling step in the cooling fluid outlet 34. It is preferable to further include a 4-1 cooling step to discharge to the condenser through.

The second cooling step may further include steps 2-2 in which a cooling fluid flows into a cooling groove formed in a cylindrical length direction of the stator 14 to form a part of the cooling channel 33. The fourth cooling step may further include a fourth cooling step of discharging the cooling fluid that has passed through the second cooling step to the condenser through the cooling fluid outlet 34.

Positional relationship of the upper, lower, left, right, etc. used to describe the preferred embodiment of the present invention is described with reference to the accompanying drawings, the positional relationship may vary according to the embodiment.

Also, unless otherwise defined, all terms used in the present invention, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art. will be. Moreover, unless expressly defined in this application, it should not be interpreted in an ideal or excessively formal sense.

In the above, the preferred embodiment of the present invention has been described and described, but, of course, the present embodiment is simply incorporated into the existing known technology or the present invention is simply modified. You will have to look.

[Description of the code]

10: housing 11: axis of rotation

12: rotor 13: coil

14: stator 15: coil winding

16: cooling groove 17: inner circumference

18: outer surface 20: turbine

31: working fluid inlet 32: turbine outlet

33: cooling passage 34: cooling fluid outlet

35: cooling fluid inlet 36: sub cooling flow path

37: vane 38: outer cooling flow path

39: cooling fluid converging portion 40: bearing

Claims

A rotating shaft connected to the turbine and rotating together with the turbine; A rotor coupled to the center of the rotating shaft to be rotatable with the rotating shaft; A cylindrical stator located outside the rotation radius of the rotor; And a cooling fluid inlet through which the cooling fluid is introduced and a cooling fluid outlet through which the cooling fluid is discharged, the housing forming a cooling passage between the cooling fluid inlet and the cooling fluid outlet.

Including,

The stator,

Is formed through the inner circumferential surface of the stator to the outer circumferential surface, so that the cooling fluid introduced into the space between the stator and the rotor can flow through the stator to the cooling fluid outlet side, and forms a path of the cooling flow path Generator cooling system comprising a sub cooling passage.
The method of claim 1,

The sub cooling flow path,

Generator cooling system comprising at least one through hole.
The method of claim 1,

The sub cooling flow path,

Generator central cooling system, characterized in that the longitudinal longitudinal section of the stator is formed to be spaced apart from each other.
The method of claim 3,

The sub cooling passage is provided with a plurality of vanes interconnecting the cut longitudinal section, the vane is characterized in that the gap is widened toward the outer edge of the longitudinal section.
The method of claim 1,

The housing,

And an outer cooling passage located at an outer circumference of the outer circumferential surface of the stator to allow cooling fluid flowing through the cooling passage to flow through the outer stator to the cooling fluid outlet.
The method of claim 1,

The stator,

And a cooling groove formed in the longitudinal direction of the cylindrical shape to allow a cooling fluid to flow into the stator to form a portion of the cooling flow path.
The method of claim 6,

The cooling groove is a generator cooling system, characterized in that formed by recessing a portion of the outer peripheral surface of the stator inward.
The method of claim 7, wherein

The cooling groove is a generator cooling system, characterized in that a part of the surface between the outer peripheral surface and the inner peripheral surface of the stator is penetrated in the longitudinal direction of the cylindrical shape.
The method of claim 1,

The cooling fluid is characterized in that consisting of the working fluid discharged from the turbine,

And the cooling fluid inlet is connected to the turbine outlet.
A rotating shaft connected to the turbine and rotating together with the turbine; A rotor coupled to the center of the rotating shaft to be rotatable with the rotating shaft; A pair of stators having a cylindrical shape positioned at an outer radius of the rotation of the rotor and spaced apart from each other on both sides of the center of the rotor; And a cooling fluid inlet through which the cooling fluid is introduced and a cooling fluid outlet through which the cooling fluid is discharged, the housing forming a cooling passage between the cooling fluid inlet and the cooling fluid outlet.

Including,

The spaces spaced apart from each other by the pair of stators allow the cooling fluid introduced into the space between the stator and the rotor to flow through the space between the stators and to the cooling fluid outlet side. Generator cooling system characterized by forming a path.
The method of claim 9,

The spaced space is provided with a plurality of vanes fixed to the housing extending to the rotor side, the vane is characterized in that the gap is wider toward the outer shell of the annular cooling space.
The method of claim 10,

The vane-fixed housing is provided with an annular cooling fluid converging portion provided with a cooling fluid condensed between each of the vanes to exit the cooling fluid outlet.
The method of claim 9,

The stator,

And a cooling groove formed in the longitudinal direction of the cylindrical shape and allowing a cooling fluid to flow into the stator to form a path of the cooling flow path.
The method of claim 13,

The cooling groove is a generator cooling system, characterized in that formed by recessing a portion of the outer peripheral surface of the stator inward.
The method of claim 13,

The cooling groove is a generator cooling system, characterized in that a part of the surface between the outer peripheral surface and the inner peripheral surface of the stator is penetrated in the longitudinal direction of the cylindrical shape.
The method of claim 9,

The cooling fluid is characterized in that consisting of the working fluid discharged from the turbine,

And the cooling fluid inlet is connected to the turbine outlet.
In the generator cooling method for cooling the inside of the housing using a cooling fluid,

A first cooling step in which the cooling fluid flows through a cooling flow path flowing through a cooling fluid inlet located at one side or both sides of the housing and leading to the center of the housing;

A second cooling step of flowing the cooling fluid through a space between a cylindrical stator disposed in the center of the housing and a rotor located inside the stator;

The cooling fluid flowing into the space between the stator and the rotor forms a flow directed toward the outside of the stator through a sub cooling flow path formed through the outer and inner circumferential surfaces of the stator by centrifugal force caused by the rotation of the rotor; 3 cooling step;

A fourth cooling step of discharging the cooling fluid having passed through the third cooling step into the condenser through a cooling fluid discharge port leading to the condenser;

Generator cooling method comprising the cooling the inside of the housing.
The method of claim 17,

The sub cooling flow path,

Generator cooling method comprising at least one through-hole.
The method of claim 17,

The sub cooling flow path,

Generator central cooling method characterized in that the longitudinal longitudinal section of the stator is formed to be spaced apart from each other.
The method of claim 19,

The sub cooling passage is provided with a plurality of vanes interconnecting the cut longitudinal section, the vane is characterized in that the gap is widened toward the outer edge of the longitudinal section.
The method of claim 17,

The second cooling step may further include a second-first cooling step in which cooling fluid is introduced into the outer cooling channel located in the housing of the outer circumferential surface of the stator and passing from the cooling channel through the stator outer circumference to the cooling fluid outlet.

The fourth cooling step further comprises a 4-1 cooling step of discharging the cooling fluid passed through the second-1 cooling step to the condenser through the cooling fluid outlet.
The method of claim 17,

The second cooling step may further include a step 2-2 in which a cooling fluid flows into a cooling groove formed in a cylindrical shape of the stator in a longitudinal direction and forms part of the cooling flow path.

The fourth cooling step is characterized in that the generator cooling method comprising a 4-2 cooling step for discharging the cooling fluid passed through the second-2 cooling step to the condenser through the cooling fluid discharge port.
The method of claim 22,

The cooling groove is a generator cooling method, characterized in that formed by recessing a portion of the outer peripheral surface of the stator inward.
The method of claim 22,

The cooling groove is a generator cooling method, characterized in that a part of the surface between the outer peripheral surface and the inner peripheral surface of the stator is penetrated in the longitudinal direction of the cylindrical shape.
The method of claim 17,

The cooling fluid is characterized in that consisting of the working fluid discharged from the turbine,

And the cooling fluid inlet is connected to the turbine outlet.
In the generator cooling method for cooling the inside of the housing using a cooling fluid,

A first cooling step in which the cooling fluid flows through a cooling flow path flowing through a cooling fluid inlet located at one side or both sides of the housing and leading to the center of the housing;

A second cooling step in which the cooling fluid flows through a space between a pair of cylindrical stators and the rotor disposed at a center of the housing and spaced apart from each other;

A third cooling step in which the cooling fluid introduced into the space between the stator and the rotor forms a flow directed toward the outside of the stator through the spaced space between the stators by centrifugal force caused by the rotation of the rotor;

A fourth cooling step of discharging the cooling fluid having passed through the third cooling step into the condenser through a cooling fluid discharge port leading to the condenser;

Generator cooling method comprising the cooling the inside of the housing.
The method of claim 26,

The spaced space of the third cooling step is provided with a plurality of vanes fixed to the housing and extending to the rotor side, the vane is characterized in that the gap is wider toward the outer shell of the annular cooling space Cooling method.
The method of claim 27,

And the annular cooling fluid converging portion is provided in the housing to which the vanes are fixed so that cooling fluids collected between the vanes can escape to the cooling fluid outlet.
The method of claim 26,

The second cooling step further includes a second-first cooling step located in the housing of the outer circumferential surface of the stator and introducing cooling fluid into the outer cooling passage from the cooling passage through the stator outer circumference to the cooling fluid outlet.

The fourth cooling step further comprises a 4-1 cooling step of discharging the cooling fluid passed through the second-1 cooling step to the condenser through the cooling fluid outlet.
The method of claim 26,

The second cooling step may further include a step 2-2 in which a cooling fluid flows into a cooling groove formed in a cylindrical shape of the stator in a longitudinal direction and forms part of the cooling flow path.

The fourth cooling step further comprises a 4-2 cooling step of discharging the cooling fluid passed through the second-2 cooling step to the condenser through the cooling fluid outlet.
The method of claim 30,

The cooling groove is a generator cooling method, characterized in that formed by recessing a portion of the outer peripheral surface of the stator inward.
The method of claim 30,

The cooling groove is a generator cooling method, characterized in that a part of the surface between the outer peripheral surface and the inner peripheral surface of the stator is penetrated in the longitudinal direction of the cylindrical shape.
The method of claim 26,

The cooling fluid is characterized in that consisting of the working fluid discharged from the turbine,

And the cooling fluid inlet is connected to the turbine outlet.