CN217388438U

CN217388438U - Flywheel energy storage motor

Info

Publication number: CN217388438U
Application number: CN202221057968.4U
Authority: CN
Inventors: 董金龙; 柳哲; 刘�东; 贺智威
Original assignee: Candela Shenzhen New Energy Technology Co Ltd
Current assignee: Candela Shenzhen New Energy Technology Co Ltd
Priority date: 2022-05-05
Filing date: 2022-05-05
Publication date: 2022-09-06
Anticipated expiration: 2032-05-05

Abstract

The application relates to a flywheel energy storage motor which comprises a stator winding, a stator core, a pouring sealant, a heat conduction inserting plate and a motor water jacket, wherein the end part of the stator winding protrudes out of the stator core along the axial direction of the stator core; the pouring sealant is arranged between the end part of the stator winding and the motor water jacket, the motor water jacket surrounds the outer peripheral sides of the stator core and the stator winding, and the heat conduction inserting plate is inserted into the pouring sealant between the end part of the stator winding and the motor water jacket. The utility model provides a flywheel energy storage motor can make flywheel energy memory under high power and vacuum environment, conducts the heat on stator winding and motor stator fast to the external world and on the motor water jacket after conduction to the casting glue through the heat conduction picture peg, and the motor water jacket can keep the low temperature state, makes stator winding and motor stator long-term operation under lower temperature, guarantees that flywheel energy storage motor satisfies quick heat dissipation requirement, and entire system's life obtains improving.

Description

Flywheel energy storage motor

Technical Field

The utility model relates to a new forms of energy equipment field especially relates to a flywheel energy storage motor.

Background

The flywheel energy storage system mainly comprises three parts: the high-speed rotating flywheel comprises a high-speed rotating flywheel body, a motor/generator and a power electronic conversion device, wherein the flywheel body and the motor/generator are supported by a magnetic suspension bearing and sealed in a vacuum device. The working principle of the system is as follows: when the energy provided by the power grid is higher than the energy required by the load, the flywheel system works in a charging state, the motor is controlled by the controller to drive the flywheel to rotate, and the electric energy is converted into mechanical energy to be stored. When the energy provided by the power grid is lower than the requirement of the load, the flywheel works in a power generation state under the control of the controller, converts the mechanical energy into electric energy, and supplies the electric energy to the load after power conversion.

Inside vacuum environment that belongs to of flywheel energy storage system, to the different frequency modulation function type of MW level (megawatt level), the main loss of motor derives from stator winding and stator, adopt traditional water jacket heat dissipation and apron heat conduction and vacuum radiation heat transfer can't reach the low temperature requirement, adopt apron heat transfer mode to further reduce stator winding and stator temperature, need be close to stator winding and paste diely even, nevertheless because the motor voltage of MW power surpasses several kilovolts even, can't accomplish to be close to and paste diely (being punctured easily and damaging the motor), under this background, can't satisfy the long-time steady operation requirement of motor.

Under the conditions of MW high power and vacuum, large motor loss and high voltage limitation of a flywheel of the flywheel energy storage system, the temperature of the motor rises to over 145 ℃, and the motor works in a high-temperature environment for a long time, so that the performance and the service life of the motor are easily influenced, and the integral reliability of the flywheel is influenced.

SUMMERY OF THE UTILITY MODEL

In view of the above, it is desirable to provide a flywheel energy storage motor that addresses at least one of the problems mentioned above.

The flywheel energy storage motor comprises a stator core, a stator winding, pouring sealant, a heat conduction inserting plate and a motor water jacket, wherein the stator winding is wound on the stator core; the end part of the stator winding protrudes out of the stator core along the axial direction of the stator core; the pouring sealant is arranged at the end part of the stator winding and between the stator water jackets, the motor water jackets surround the stator core and the outer peripheral sides of the stator winding, and the heat conduction inserting plate is inserted into the end part of the stator winding and between the motor water jackets in the pouring sealant.

In one embodiment, the heat conducting inserting plate is a cylindrical heat conducting aluminum plate, and the heat conducting difference is isolated from the end part of the stator winding through the pouring sealant.

In one embodiment, the end part of the heat conducting inserting plate, which is far away from the stator core, is of a flanging structure.

In one embodiment, the heat conducting inserting plate is installed on the motor water jacket through the flanging structure.

In one embodiment, the outer surface of the thermally conductive insert plate is provided with an alumina ceramic coating.

In one embodiment, the thickness of the alumina ceramic coating is 0.5 mm-0.7 mm.

In one embodiment, the water jacket further comprises a motor shell, and the motor water jacket is fixed in the motor shell.

In one embodiment, the motor water jacket is provided with a spiral water channel at the periphery.

The embodiment of the utility model provides an in the technical scheme who provides bring following beneficial technological effect:

the utility model provides a flywheel energy storage motor can make flywheel energy memory under high power and vacuum environment, conduct the heat on stator winding and the motor stator fast through the heat conduction picture peg and on external and the motor water jacket, the motor water jacket can keep the low temperature state to make heat conduction go out rapidly, do not produce the long-term operation under lower temperature with motor stator, guarantee that flywheel energy storage motor satisfies the requirement of dispelling the heat fast, entire system's life obtains improving.

Additional aspects and advantages of the present invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Drawings

Fig. 1 is a schematic view of a part of the structural assembly state of a flywheel energy storage motor according to an embodiment of the present invention;

fig. 2 is a schematic cross-sectional view of a stator structure of a flywheel energy storage motor according to an embodiment of the present invention;

fig. 3 is a schematic perspective view of an embodiment of the present invention, illustrating a flywheel energy storage motor.

Description of reference numerals:

100-stator winding, 200-stator core, 300-heat conducting inserting plate, 400-pouring sealant, 500-motor water jacket and 600-motor shell;

310-flanging structure, 510-spiral water channel.

Detailed Description

In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. Possible embodiments of the invention are given in the figures. The invention may, however, be embodied in many different forms and is not limited to the embodiments described herein by way of example only and with reference to the accompanying drawings. The embodiments described herein with reference to the drawings are illustrative for the purpose of providing a more thorough understanding of the present disclosure and are not to be construed as limiting the present disclosure. Furthermore, if a detailed description of known technologies is not necessary for illustrating the features of the present invention, these technical details may be omitted.

It will be understood by those within the relevant art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

As used herein, the singular forms "a", "an", "the" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. It is to be understood that the term "and/or" as used herein is intended to include all or any and all combinations of one or more of the associated listed items.

The technical solution of the present invention and how to solve the above technical problems will be described in detail with specific embodiments.

An embodiment of the present application provides a flywheel energy storage motor, as shown in fig. 1 to 3, including a stator core 200, a stator winding 100 wound on the stator core 200, a potting adhesive 400, a heat conducting insert plate 300, and a motor water jacket 500. The end of the stator winding 100 protrudes out of the stator core 200 along the axial direction of the stator core 200, the motor water jacket 500 surrounds the outer peripheral sides of the stator core 200 and the stator winding 100, the potting adhesive 400 is arranged between the end of the stator winding 100 and the motor water jacket 500, the heat-conducting inserting plate 300 is arranged between the stator winding 100 and the motor water jacket 500, and the heat-conducting inserting plate 300 is inserted into the potting adhesive 400 between the end of the stator winding 100 and the motor water jacket 500. The stator of the motor is internally provided with a rotor of the flywheel energy storage motor, and the rotor is connected with the flywheel. The top end face of the heat-conducting insert plate 300 (toward the outside of the open end of the stator winding 100) extends to the outside of the stator core 200. The heat conducting insert plate 300 is equivalent to a cylindrical sleeve, and is disposed between the stator winding 100 and the motor water jacket 500, the material may be a material that easily conducts heat, such as aluminum alloy or aluminum, alternatively, the heat conducting insert plate 300 is a cylindrical heat conducting aluminum plate, the heat conductivity of the heat conducting insert plate 300 may be as high as 202W/mk, and the heat conducting insert plate 300 is isolated from the end of the stator winding 100 by the potting adhesive 400, so that heat can be quickly conducted to another medium. Pouring the motor pouring sealant 400 between the stator winding 100 and the heat-conducting plugboard 300 to play a role in fixing the heat-conducting plugboard 300 and conducting heat; meanwhile, when the heat-conducting plugboard is a heat-conducting aluminum plate, the pouring sealant also plays a role in avoiding direct contact and short circuit of the heat-conducting plugboard and the winding.

The utility model provides a flywheel energy storage motor makes flywheel energy memory under high power and vacuum environment, conduct outside and motor water jacket 500 fast after conduction to the casting glue with the heat on stator winding 100 and the stator core through heat conduction picture peg 300, motor water jacket 500 can keep the low temperature state, thereby make the heat conduction go out rapidly, do not produce long-term operation under lower temperature, make stator winding 100 and stator core 200, guarantee that flywheel energy storage motor satisfies the requirement of dispelling the heat fast, entire system's life obtains improving.

Optionally, in combination with the first aspect embodiment and the implementation manner described above, as shown in fig. 2, the end of the heat conducting insert plate 300 away from the stator core 200 is a flanged structure 310. The heat conducting insert plate 300 is equivalent to a T-shaped sleeve, and the contact area with the outside is increased through the flanging structure 310, so that heat is more easily dissipated, and the heat conducting insert plate is also conveniently connected with other structures, for example, a threaded hole may be formed in the flanging structure 310, and the heat conducting insert plate 300 is fixedly mounted through a bolt or a screw, so that the heat conducting insert plate 300 is mounted on the motor water jacket 500 through the flanging structure 310.

With reference to the first aspect and the implementations described above, in certain implementations of the first aspect, the outer surface of the thermally conductive insert plate 300 is provided with an alumina ceramic coating. The peripheral side surface of the heat-conducting interposer 300 is coated with an alumina ceramic layer, which can greatly enhance the voltage resistance of the heat-conducting interposer 300. Optionally, the thickness of the alumina ceramic coating is 0.5 mm-0.7 mm. The heat conducting inserting plate 300 coated with the alumina ceramic coating with the thickness of 0.5mm can resist 3000V at most, and the heat conducting inserting plate 300 made of aluminum can have the high heat conductivity coefficient of 202W/mk on one hand and the electric breakdown resisting performance of 3000V on the other hand.

Optionally, as shown in fig. 2 and fig. 3, the flywheel energy storage motor provided by the present application further includes a motor housing 600, a stator of the flywheel energy storage motor is located in the motor housing 600, and the motor water jacket 500 is fixed in the motor housing. Optionally, a spiral water channel 510 is arranged on the outer circumferential surface of the motor water jacket 500, and cooling water flows between the motor water jacket 500 and the motor housing 600 through the spiral water channel 510, so as to quickly and fully carry away heat in the flywheel energy storage motor.

The flywheel energy storage motor has a stator heat dissipation structure with high voltage resistance and high heat conduction, can effectively reduce the problem that the high temperature of a flywheel rises under high power, can effectively reduce the temperature by more than 20 ℃ on the structural basis before the structure is not adopted, and ensures the safe and reliable performance of flywheel operation at megawatt level.

It will be understood by those skilled in the art that the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, the meaning of "a plurality" is two or more unless otherwise specified.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

The particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.

The foregoing is only a partial embodiment of the present application, and it should be noted that, for those skilled in the art, several modifications and decorations can be made without departing from the principle of the present application, and these modifications and decorations should also be regarded as the protection scope of the present application.

Claims

1. A flywheel energy storage motor is characterized by comprising a stator core, a stator winding wound on the stator core, pouring sealant, a heat conduction inserting plate and a motor water jacket;

the end part of the stator winding protrudes out of the stator core along the axial direction of the stator core; the pouring sealant is arranged at the end part of the stator winding and between the motor water jackets, the motor water jackets surround the stator core and the outer peripheral sides of the stator winding, and the heat conduction inserting plate is inserted into the end part of the stator winding and between the motor water jackets in the pouring sealant.

2. The flywheel energy storage motor according to claim 1, wherein the heat conducting insert plate is a cylindrical heat conducting aluminum plate, and the heat conducting insert plate is isolated from the end portion of the stator winding by the potting adhesive.

3. The flywheel energy storage motor of claim 1, wherein the end of the heat conducting insert plate away from the stator core is of a flanged structure.

4. The flywheel energy storage motor as claimed in claim 3, wherein the heat conducting insert plate is mounted on the motor water jacket through the flanging structure.

5. The flywheel energy storage motor of claim 1, wherein an aluminum oxide ceramic coating is provided on an outer surface of the thermally conductive insert plate.

6. The flywheel energy storage motor of claim 5, wherein the alumina ceramic coating has a thickness of 0.5mm to 0.7 mm.

7. The flywheel energy storage motor of claim 1, further comprising a motor housing, the motor water jacket being secured within the motor housing.

8. The flywheel energy storage motor of claim 1, wherein the motor water jacket has a helical water channel around its periphery.