KR20170027168A - Rotor assembly having cooling path - Google Patents

Rotor assembly having cooling path Download PDF

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Publication number
KR20170027168A
KR20170027168A KR1020150123763A KR20150123763A KR20170027168A KR 20170027168 A KR20170027168 A KR 20170027168A KR 1020150123763 A KR1020150123763 A KR 1020150123763A KR 20150123763 A KR20150123763 A KR 20150123763A KR 20170027168 A KR20170027168 A KR 20170027168A
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KR
South Korea
Prior art keywords
cooling
duct
insulation panel
tooth
passage
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Application number
KR1020150123763A
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Korean (ko)
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KR101783098B1 (en
Inventor
황계하
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두산중공업 주식회사
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Priority to KR1020150123763A priority Critical patent/KR101783098B1/en
Publication of KR20170027168A publication Critical patent/KR20170027168A/en
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Publication of KR101783098B1 publication Critical patent/KR101783098B1/en

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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
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/04—Details of the magnetic circuit characterised by the material used for insulating the magnetic circuit or parts thereof
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K9/00—Arrangements for cooling or ventilating
    • H02K9/02—Arrangements for cooling or ventilating by ambient air flowing through the machine

Abstract

The present invention relates to a rotor assembly having a cooling flow path. The rotor assembly includes: a straight unit arranged along the outer circumference of a rotor body in all directions and having multiple teeth arranged at intervals, wherein multiple conductors are piled on the straight unit in multiple layers and are inserted between the teeth; multiple coil turns extended from the straight unit and having a curve unit arranged in a curve form on the outer circumference of a spindle; and a pair of insulation panels insulating a space between the straight unit and the tooth by being inserted between the straight unit and the tooth. The insulation panel has the multiple cooling flow paths guiding a cooling fluid on a plate surface in the longitudinal direction. According to the present invention, the rotor assembly can improve cooling performance of the coil turn by including the cooling flow path capable of guiding the cooling fluid to the conductor located on an end of the rotor body. Also, the cooling flow path is formed in only an upper area of the tooth, so processing stress of the tooth is not influenced. Therefore, the rotor assembly can be applied to a product without difficulty.

Description

[0001] The present invention relates to a rotor assembly having a cooling path,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a rotor assembly having a cooling passage, and more particularly, to a rotor assembly having a cooling passage capable of improving cooling performance of a coil turn.

 Generally, a generator is a device that converts mechanical energy into electric energy by using an electromagnetic induction function, and uses a principle that a conductor generates electric power when rotating in a magnetic field. These generators use hydrogen gas and water as the cooling medium and are completely enclosed to prevent dust and moisture from entering and leakage of hydrogen gas.

The ventilation inside the generator is a closed circulation system by a fan attached to the rotor axis of the rotor, and a cooler is incorporated to cool the hydrogen gas. The stator, which is a stator, includes a stator core that accommodates the rotor, in which coils and coils are wound, and a frame that supports the stator core.

The current flowing through the coil during rotation of the rotor generates heat. Failure to effectively dissipate heat from the rotor coil causes degradation of the generator performance.

To solve this problem, Korean Patent Publication No. 2010-0120267 discloses a rotary electric machine and a rotor having a structure for cooling the rotor.

The conventional cooling structure is a structure in which the cooling of the conductor assembled inside the rotor body depends only on the cooling fluid flowing into the sub-slots.

However, with such a conventional cooling structure, it is difficult to efficiently cool the rotor coil of the generator, which is gradually becoming large, and in particular, there is a problem that it is difficult to efficiently cool the conductor of the rotor body end portion where the temperature is higher than the peripheral portion.

Korean Patent Publication No. 2010-0120267 (published on November 15, 2010)

SUMMARY OF THE INVENTION It is an object of the present invention to provide a rotor assembly having a cooling channel that can improve the cooling performance of a coil turn by providing a cooling channel that can efficiently cool down to the conductor end of the body of the rotor.

A rotor assembly having a cooling passage according to the present invention includes a tooth arranged radially along an outer circumferential surface of a rotor body and having a plurality of teeth spaced from each other and a plurality of conductors stacked in multiple stages, A plurality of coil turns extending from the straight portion and forming a curved portion arranged in a curved shape on an outer peripheral surface of the spindle, and a plurality of coil turns inserted between the straight portion and the straight portion, And a pair of insulation panels that insulate the trough from each other, wherein the insulation panel has a plurality of cooling passages formed on a surface of the plate for guiding the cooling fluid along a longitudinal direction of the rotor.

And the cooling passage is integrally formed by machining the plate surface of the insulation panel.

And the cooling passage is formed by attaching a member of the same or different material to the insulation panel.

The insulation panel includes a guide portion protruding from the plate surface toward the straight portion, and the cooling passage formed between the guide portion.

Further comprising a duct block having a plurality of ducts through which the cooling fluid is exhausted,

The insulation panel may further include a duct connecting channel communicating with any one of the cooling duct and the duct.

The plurality of cooling passages are arranged at equal intervals, and the inlet end to the outlet end through which the cooling fluid flows are straight.

The insulation panel may further include a plurality of sub flow paths connecting the plurality of cooling flow paths.

The plurality of cooling passages are arranged at equal intervals and are in the form of waves.

The plurality of cooling passages are provided so as to cross each other.

The duct block may further include a communication passage for communicating the communication passage for communicating the at least one of the ducts with the duct connection passage.

And a wedge block provided at an upper portion of the duct block and having a plurality of exhaust ports communicating with the duct.

A rotor assembly having a cooling passage according to the present invention includes a tooth arranged radially along an outer circumferential surface of a rotor body and having a plurality of teeth arranged to be spaced apart from each other, a plurality of conductors stacked in multiple stages, A plurality of coil turns extending from the straight portion to form a curved portion arranged in a curved shape on the outer peripheral surface of the spindle; a plurality of coil turns inserted between the straight portion and the tooth, And a pair of insulation panels for insulating the straight portion from the trough, wherein the insulation panel has a plurality of cooling passages for guiding the cooling fluid along the longitudinal direction of the rotor on the plate surface, Is provided in the upper region.

The cooling passage may be integrally formed by processing the surface of the insulation panel, or may be formed by attaching a member of the same or different material to the insulation panel.

The insulation panel includes a guide portion protruding from the plate surface toward the straight portion, and the cooling passage formed between the guide portion.

A duct block provided with a plurality of ducts through which the cooling fluid is exhausted, and a wedge block provided at an upper portion of the duct block and having a plurality of exhaust ports communicating with the duct.

The insulation panel further includes a duct connecting flow path for connecting the cooling flow path to any one of the ducts.

The plurality of cooling passages are arranged at equal intervals, and the inlet end to the outlet end through which the cooling fluid flows are straight.

The plurality of cooling passages are arranged at equal intervals and are in the form of waves.

The plurality of cooling passages are provided so as to cross each other.

The duct block may further include a communication passage for communicating the communication passage for communicating the at least one of the ducts with the duct connection passage.

The rotor assembly having the cooling channel according to the embodiment of the present invention has a cooling channel that can guide the cooling fluid to the conductor located at the end of the rotor body, thereby improving the cooling performance of the coil turn. Further, in forming the cooling channel, only the upper region of the tooth is processed so that there is no influence on the processing stress of the tooth, so that there is no problem in applying the product.

1 is a partial perspective view of a rotor assembly according to an embodiment of the present invention,
2 is a perspective view showing a main part of the rotor assembly according to FIG. 2,
3 is a perspective view showing a main part of the rotor assembly according to FIG. 3,
FIG. 4 is a perspective view showing an insulation panel of the rotor assembly according to FIG. 2,
5A to 5C are schematic diagrams showing embodiments of the insulation panel according to FIG. 4,
6A to 6C are schematic diagrams showing embodiments of the duct block according to Fig.

Hereinafter, a rotor assembly having a cooling passage according to an embodiment of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a partial perspective view showing a rotor assembly according to an embodiment of the present invention, and FIG. 2 is a perspective view showing a main part of the rotor assembly according to FIG. FIG. 3 is a perspective view showing a main part of the rotor assembly according to FIG. 3, and FIG. 4 is a perspective view showing an insulation panel of the rotor assembly according to FIG.

The rotor assembly 10 for a generator according to an embodiment of the present invention includes a rotor 100 disposed in the stator and rotating, and a plurality of coil turns 130 disposed on the outer circumferential surface of the rotor 100. The coil turns 130 are housed in the housing 190 and are not exposed to the outside of the rotor 100.

The rotor 100 includes a rotor body 110 having a plurality of teeth 112 and subslots 114 formed therein and a spindle 120 extending from one side of the rotor body 110, A plurality of coil turns 130 are disposed in the vicinity of the coil turns 120.

The teeth 112 extend from the outer circumferential surface of the rotor body 110 toward the stator in a radially outward direction and may be provided on all or a part of the outer circumferential surface of the rotor body 110 according to the coupling relationship with other components. The straight portion 134 of the coil turn 130 is inserted into the upper portion of the tooth 112 and the adjacent tooth 112 and the lower portion is a portion where the sub slot 114 is formed.

The tooth 112 has a width narrower from the outer side toward the inner side of the rotor body 110 and has a step 112a at a portion where the subslot 114 is formed. The step 112a serves to separate the area where the straight line part 134 of the coil turn 130 is inserted and the area of the sub slot 114 and to support the straight line part 134 of the coil turn 130 .

The subslot 114 is formed between the teeth 112 and is positioned below the coil turns 130 in a state of being inserted between the tooth 112. The sub slot 114 is located below the coil turns 130 where the plurality of ducts 142 are formed and guides the cooling fluid introduced to the lower side of the coil turns 130 through the teeth 112, 110 are cooled. Since the subslot 114 and the duct 142 of the coil turn 130 communicate with each other to allow the fluid to flow, the cooling fluid introduced into the subslot 114 flows through a duct (not shown) of the coil turn 130 ≪ / RTI >

The coil turn 130 includes a straight portion 134 which is stacked in a plurality of conductors and has a curved shape on the outer peripheral surface side of the spindle 120, As shown in FIG.

The conductors 132 are stacked in a multilayer structure. The portions inserted between the teeth 112 are stacked in a linear shape (linear portion) and extended in a curved shape so as to surround the outer circumferential surface of the spindle 120 in a straight- (Curved portion). The one straight line portion 134 of the conductor 132 laminated in multiple layers is inserted between the teeth 112 and the other straight line portion 134 is inserted in the opposite tooth 112 in a state where the curved portion 136 is disposed on the outer peripheral surface of the spindle, Quot; C " -shaped arrangement inserted between the coil turns 130 is referred to as a coil turn 130. A plurality of coil turns 130 are arranged on the rotor 100 and inserted between the teeth 112, respectively.

A duct block 140 having a plurality of ducts 142 for exhausting a cooling fluid is provided on the upper side of the rectilinear section 134 since heat is generated in the conductor 132 while the rotor 100 rotates, And a wedge block 150 formed with a plurality of exhaust ports 152 connected to the duct 142 on the upper side of the exhaust pipe 140. In addition, since the conductor 132 is a conductor, an insulation panel 170 is provided to isolate electricity from being transmitted to the tooth 112.

The duct block 140 includes a plurality of ducts 142 having a predetermined length along the longitudinal direction of the rectilinear section 134. A duct hole is also formed in the rectilinear section 134 corresponding to the position of the duct 142 So that the cooling fluid is communicated. The duct block 140 is formed with a communication passage 144 communicating with a cooling passage 174 to be described later (to be described later).

The insulation panel 170 is inserted between the tooth 112 and the neighboring tooth 112 to block the linear portion 134 of the coil turn 130 from contacting the side of the tooth 112, I make it. Therefore, the insulation panel 170 is inserted in a pair so as to cover the respective straight portions 134 from both sides.

The insulation panel 170 can process a part of the area on the flat panel to form a flow path through which the cooling fluid can flow so that the cooling fluid that has only flowed through the sub slot 114 can also flow into the upper area of the insulation panel 170 It is the role of the guide. The flow path for cooling may be formed integrally with the insulation panel 170, or may be formed by processing and attaching a separate member.

The upper surface of the insulation panel 170 is bent and protruded toward the tooth 112, thereby securing a region having a width larger than that of the conventional plate insulation panel 170, thereby forming a flow path in the region. The space required for forming the cooling channel 174 can be ensured by providing the groove 112b formed in the upper region of the tooth 112 and the groove 112b can affect the machining stress of the tooth 112 It is preferable that the workpiece is machined to a depth that does not give it.

The insulation panel 170 includes a guide portion 172 protruding from the plate surface toward the linear portion 134 of the coil turn 130, a cooling passage 174 formed in the direction of the trough 112 from the plate surface, And a duct connecting passage 176 for guiding the cooling fluid passed through the duct block 140 toward the duct block 140.

The guide portion 172 is located in the upper region of the insulation panel 170 and protrudes from the plate surface in the direction of the straight line portion 134 in a convex manner. It is preferable that at least one guide member 172 or a plurality of guide members 172 are provided along the longitudinal direction of the insulation panel 170. The guide portion 172 may be formed by processing the plate surface of the insulation panel 170, or may be formed by processing a separate material of the same or different materials into a rectangular parallelepiped shape. When a plurality of guide portions 172 are provided, a space formed between the guide portions 172 becomes a cooling channel 174 through which the cooling fluid can move.

The cooling passage 174 is disposed in the upper region of the insulation panel 170 and is formed so as to be recessed from the plate surface toward the tooth 112. The cooling passage 174 is disposed along the longitudinal direction of the insulation panel 170 and is connected to the lower end of the curved portion 136 of the coil turn 130 and the outer peripheral surface of the spindle 120, .

The cooling fluid flowing along the cooling passage 174 formed in the insulation panel 170 and cooling the linear portion 134 of the coil turn 130 and the end portion of the rotor body 110 is cooled by the duct formed in the direction opposite to the inflow direction And exits through the connection passage 176.

The duct connecting passage 176 connects the cooling passage 174 and is connected to the duct 142 of the duct block 140 to guide the cooling fluid to move toward the duct 142.

A communication passage 144 for communicating at least one of the duct connecting passage 176 and the duct 142 is formed at one side of the duct block 140. The communication passage 144 is formed so that the cooling fluid flows out through the side surface of the duct block 140 and the cooling fluid flows into the duct 142 between the lower surface of the wedge block 150 and the upper surface of the duct block 140 . The communication channel 144 is connected to the duct 142 near the end of the duct 142 of the duct block 140 and is provided in a form of cutting the side surface and a part of the upper surface of the duct block 140.

The cooling fluid can flow only to the lower side of the tooth 112 through the subslot 114 because the insulation panel 170 and the tooth 112 are closely contacted with each other without any gap. So that the cooling fluid can flow to the upper region of the tooth 112 through the cooling passage 174. [

The temperature of the conductors 132 located at the end of the rotor body 110 near the curved portion 136 of the coil turn 130 is generally higher than the center of the rotor body 110. [ This is because the general cooling structure intensively cools the center of the rotor body 110, so that the heated fluid receives heat from the curved portion 136 and flows thereinto. The reduction of the cross sectional area of the conductor 132 due to the machining of the exhaust port 152 also causes an increase in the amount of heat generated, which causes the temperature of the conductor 132 at the end portion of the rotor body 110 to increase.

However, by forming the cooling passage 174, the cooling fluid flows directly from the end portion of the rotor body 110 to the center and is cooled while being moved, thus enabling efficient cooling of the rotor body 110 and the coil turn 130.

The rotor assembly according to an embodiment of the present invention having such a configuration can realize various forms of the cooling channel and the communication channel. Hereinafter, various types of cooling channels and communication channels will be described with reference to the drawings.

Figs. 5A to 5C are schematic diagrams showing embodiments of the insulation panel according to Fig. 4, and Figs. 6A to 6C are schematic diagrams showing embodiments of a duct block according to Fig.

As shown in FIG. 3, a plurality of cooling passages 174 may be linearly arranged along the longitudinal direction of the insulation panel 170, and the cooling passages 174 may be arranged in the form of a wave- 174 may be arranged at a same interval.

Alternatively, the linear cooling passages 174 may be arranged in a crossing manner as shown in FIG. 5B, or may have a sub passage connecting the plurality of linear cooling passages 174 as shown in FIG. 5C.

All the cooling flow paths 174 communicate with the duct connecting flow paths 176 at the ends and the cooling fluid is guided to the communication flow paths 144 through the duct connecting flow paths 176.

As shown in FIG. 6A, the communication channel 144 may be formed in a rectangular shape on a side surface and an upper surface of the duct block 140, and a plurality of channels may be formed on the upper surface of the duct block 140 in a rectangular shape.

Alternatively, the communication passage 144 may be recessed on the upper surface of the duct block 140 in a rectangular or rhombic shape, as shown in FIG. 6B.

As shown in FIG. 6C, the communication passage 144 may be formed on the upper surface of the duct block 140 in a rectangular or rhombic shape, and may be formed in the plurality of the ducts 142.

The cooling fluid flows into the upper surface of the duct block 140 through the side surface of the duct block 140 and is guided to the duct 142 along the recessed flow path of the upper surface. The cooling fluid guided to the duct 142 is discharged through the duct 142 to the exhaust port 152 of the wedge block 150 stacked on the upper surface of the duct block 140.

As described above, the rotor assembly having the cooling passage according to the embodiment of the present invention has the cooling passage that can guide the cooling fluid to the conductor located at the end of the rotor body, thereby improving the cooling performance of the coil turn have. Further, in forming the cooling channel, only the upper region of the tooth is processed so that there is no influence on the processing stress of the tooth, so that there is no problem in applying the product.

One embodiment of the present invention described above and shown in the drawings should not be construed as limiting the technical spirit of the present invention. The scope of the present invention is limited only by the matters described in the claims, and those skilled in the art can improve and modify the technical spirit of the present invention in various forms. Accordingly, it is intended that the present invention cover the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents.

10: rotor assembly 100: rotor
110: rotor body 112:
114: subslot 120: spindle
130: Coil turn 132: Conductor
134: straight section 136: curved section
140: Duct block 142: Duct
144: communication channel 150: wedge block
170: insulation panel 172: guide portion
174: Cooling duct 176: Duct connecting duct

Claims (20)

A tooth arranged radially along the outer circumferential surface of the rotor body, wherein a plurality of teeth are disposed apart from each other;
A plurality of conductors which are stacked in a plurality of stages and in which a conductor is inserted between the teeth and a plurality of coil turns which form a curved portion extending from the straight portion and arranged in a curved shape on an outer peripheral surface of the spindle, ,
And a pair of insulation panels inserted between the rectilinear portion and the tooth to insulate the rectilinear portion from the tooth,
Wherein the insulation panel has a plurality of cooling passages for guiding a cooling fluid along the longitudinal direction of the rotor on the plate surface. The method according to claim 1,
Wherein the cooling passage is integrally formed by machining a plate surface of the insulation panel. The method according to claim 1,
Wherein the cooling passage is formed by attaching a member made of the same or different material to the insulation panel. The method of claim 3,
Wherein the insulation panel includes a guide portion protruding from the plate surface toward the straight portion, and the cooling passage formed between the guide portions. The method according to claim 2 or 4,
Further comprising a duct block having a plurality of ducts through which the cooling fluid is exhausted,
Wherein the insulation panel further includes a duct connecting channel communicating with any one of the cooling channel and the duct. 6. The method of claim 5,
Wherein a plurality of the cooling passages are arranged at equal intervals and the inlet end to the outlet end from which the cooling fluid flows are straight. The method according to claim 6,
Wherein the insulation panel further includes a plurality of sub flow paths for connecting the plurality of cooling flow paths. 6. The method of claim 5,
Wherein a plurality of cooling passages are arranged at equal intervals and are in the form of waves. 6. The method of claim 5,
Wherein the plurality of cooling passages are provided in a plurality of mutually intersecting positions. 6. The method of claim 5,
Wherein the duct block further comprises a communication passage for communicating the communication passage for communicating the at least one of the duct and the duct connection passage. 11. The method of claim 10,
And a wedge block provided at an upper portion of the duct block and having a plurality of exhaust ports communicating with the duct. A tooth arranged radially along the outer circumferential surface of the rotor body, wherein a plurality of teeth are disposed apart from each other;
A plurality of conductors which are stacked in a plurality of stages and in which a conductor is inserted between the teeth and a plurality of coil turns which form a curved portion extending from the straight portion and arranged in a curved shape on an outer peripheral surface of the spindle, ,
And a pair of insulation panels inserted between the rectilinear portion and the tooth to insulate the rectilinear portion from the tooth,
Wherein the insulation panel has a plurality of cooling passages for guiding a cooling fluid along a longitudinal direction of the rotor, the cooling passages being provided in an upper region of the through-hole. 13. The method of claim 12,
Wherein the cooling passage is integrally formed by machining a plate surface of the insulation panel or is formed by attaching a member of the same or different material to the insulation panel. 14. The method of claim 13,
Wherein the insulation panel includes a guide portion protruding from the plate surface toward the straight portion, and the cooling passage formed between the guide portions. 15. The method of claim 14,
A duct block including a plurality of ducts through which the cooling fluid is exhausted; and a wedge block provided at an upper portion of the duct block and having a plurality of exhaust ports communicating with the duct. 14. The method of claim 13,
Wherein the insulation panel further comprises a duct connecting channel for connecting the cooling duct to any one of the ducts. 17. The method of claim 16,
Wherein a plurality of the cooling passages are arranged at equal intervals and the inlet end to the outlet end from which the cooling fluid flows are straight. 17. The method of claim 16,
Wherein a plurality of cooling passages are arranged at equal intervals and are in the form of waves. 17. The method of claim 16,
Wherein the plurality of cooling passages are provided in a plurality of mutually intersecting positions. 16. The method of claim 15,
Wherein the duct block further comprises a communication passage for communicating the communication passage for communicating the at least one of the duct and the duct connection passage.
KR1020150123763A 2015-09-01 2015-09-01 Rotor assembly having cooling path KR101783098B1 (en)

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US11387699B2 (en) 2020-12-15 2022-07-12 General Electric Renovables Espana, S.L. Rotating cooling system for wind turbine generator

Citations (1)

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Publication number Priority date Publication date Assignee Title
KR20100120267A (en) 2009-05-05 2010-11-15 제너럴 일렉트릭 캄파니 Generator coil cooling baffles

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JP5016843B2 (en) * 2006-04-28 2012-09-05 株式会社東芝 Rotating electrical machine rotor

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20100120267A (en) 2009-05-05 2010-11-15 제너럴 일렉트릭 캄파니 Generator coil cooling baffles

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