CN220066983U - Vacuum electrode assembly, motor and flywheel energy storage device - Google Patents

Abstract

The utility model is suitable for the field of flywheel energy storage devices, and discloses a vacuum electrode assembly, a motor and a flywheel energy storage device. The vacuum electrode assembly comprises a conductive column, a flange, a ceramic sleeve and a first kovar alloy component, wherein one end of the conductive column is used for penetrating into a vacuum shell, and the other end of the conductive column is used for penetrating out of the vacuum shell; the flange is used for being connected with the vacuum shell; the ceramic sleeve is arranged between the flange and the local conductive column along the radial direction of the conductive column; the first kovar alloy member is arranged between the flange and the ceramic sleeve along the radial direction of the conductive column and is used for connecting the flange and the ceramic sleeve. According to the vacuum electrode assembly and the flywheel energy storage device, the first kovar alloy component is arranged between the flange and the ceramic sleeve and used for connecting the flange and the ceramic sleeve, so that the characteristic that the thermal expansion coefficients of the kovar alloy and the ceramic are close to each other can be utilized, and the adverse phenomenon that the ceramic sleeve expands and is squeezed and cracked is reduced.

Description

Vacuum electrode assembly, motor and flywheel energy storage device

Technical Field

The utility model relates to the field of flywheel energy storage devices, in particular to a vacuum electrode assembly, a motor with the vacuum electrode assembly and a flywheel energy storage device with the motor.

Background

A flywheel energy storage device provided by the related art is provided with a vacuum electrode assembly. One end of the vacuum electrode assembly penetrates through the vacuum shell of the motor and is electrically connected with the winding, and the other end of the vacuum electrode assembly penetrates out of the vacuum shell to be used for external cable electrical connection. The vacuum electrode assembly comprises a conductive column, a ceramic sleeve and a metal flange, wherein the ceramic sleeve is sleeved outside the conductive column, and the metal flange is sleeved outside the ceramic sleeve.

The vacuum electrode assembly described above has the following disadvantages in a specific application: because the expansion coefficients of the metal flange and the ceramic sleeve are greatly different, larger gaps and stress are easily generated between the metal flange and the ceramic sleeve, so that the contact sealing performance of the metal flange and the ceramic sleeve can be affected, and the ceramic sleeve is easily extruded and cracked due to the large stress.

Disclosure of Invention

A first object of the present utility model is to provide a vacuum electrode assembly, which aims to solve the technical problem that a large gap and stress are easily generated between a flange and a ceramic sleeve in the related art.

In order to achieve the above purpose, the utility model provides the following scheme: a vacuum electrode assembly, comprising:

one end of the conductive column is used for penetrating into the vacuum shell, and the other end of the conductive column is used for penetrating out of the vacuum shell;

the flange is used for being connected with the vacuum shell;

the ceramic sleeve is arranged between the flange and the local conductive column along the radial direction of the conductive column;

the first kovar alloy member is arranged between the flange and the ceramic sleeve along the radial direction of the conductive column and is used for connecting the flange and the ceramic sleeve.

As one embodiment, the first kovar member comprises a first kovar sleeve; or,

the first kovar alloy member comprises at least two first kovar alloy sleeves, the at least two first kovar alloy sleeves are arranged between the flange and the ceramic sleeve, and the at least two first kovar alloy sleeves are sequentially connected along the axial direction of the conductive column.

As one embodiment, the vacuum electrode assembly further comprises a second kovar alloy member, one end of the second kovar alloy member is sleeved outside the end part of the ceramic sleeve, which is far away from the vacuum shell, and the other end of the second kovar alloy member is sleeved outside the conductive column; and/or the number of the groups of groups,

the first kovar member is welded to the flange.

As one embodiment, the ceramic sleeve comprises a main sleeve body and a convex ring, wherein the convex ring is convexly arranged outside at least partial peripheral surface of the main sleeve body.

As one embodiment, the collar comprises at least one ring-shaped protrusion; or,

the convex ring is a spiral bulge.

As one embodiment, the main sleeve body comprises a penetrating part and an exposed part, the penetrating part is penetrated in the vacuum shell, the exposed part is used for exposing out of the vacuum shell, and the convex ring is convexly arranged outside at least partial peripheral surface of the exposed part; and/or the number of the groups of groups,

and a space exists between the inner peripheral surface of the ceramic sleeve and the outer peripheral surface of the conductive column.

As an embodiment, the vacuum electrode assembly further comprises at least two sealing rings, and the at least two sealing rings are used for sealing the fit gap between the flange and the vacuum shell respectively.

As one embodiment, the flange comprises a connecting disc part and a connecting sleeve part, wherein the connecting disc part is used for being clamped outside the vacuum shell and is fixedly connected with the vacuum shell;

the connecting sleeve part is used for extending from the connecting disc part to penetrate through the vacuum shell;

at least one sealing ring is used for sealing a fit gap between the outer peripheral surface of the connecting sleeve part and the vacuum shell;

at least one other sealing ring is used for sealing the fit clearance between the axial end face of the connecting disc part and the vacuum shell.

A second object of the present utility model is to provide an electric machine comprising:

the motor comprises a motor body, wherein the motor body comprises a vacuum shell and a winding, a vacuum inner cavity is formed in the vacuum shell, and the winding is arranged in the vacuum inner cavity;

in the vacuum electrode assembly, one end of the vacuum electrode assembly penetrates through the vacuum inner cavity and is electrically connected with the winding.

A third object of the present utility model is to provide a flywheel energy storage device, which includes a flywheel body and the above-mentioned motor, wherein the motor is connected with the flywheel body.

According to the vacuum electrode assembly and the flywheel energy storage device, the first kovar alloy component is arranged between the flange and the ceramic sleeve and used for connecting the flange and the ceramic sleeve, so that the characteristic that the thermal expansion coefficients of the kovar alloy and the ceramic are close to each other can be utilized, and the first kovar alloy component and the ceramic sleeve have good contact sealing performance; and the first kovar alloy component and the ceramic sleeve can be expanded approximately synchronously when heated, so that stress generated by expansion is prevented from being concentrated in the ceramic sleeve, and adverse phenomena that the ceramic sleeve is expanded and extruded and cracked are reduced.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic perspective view of a motor according to an embodiment of the present utility model;

FIG. 2 is a schematic view in partial cross-section of a motor provided in an embodiment of the present utility model;

FIG. 3 is an enlarged partial schematic view at A in FIG. 2;

fig. 4 is a perspective assembly schematic view of a vacuum electrode assembly according to an embodiment of the present utility model;

FIG. 5 is an exploded view of a vacuum electrode assembly provided in an embodiment of the present utility model;

FIG. 6 is a schematic structural view of a second kovar member provided in an embodiment of the utility model;

FIG. 7 is a schematic view of a ceramic sleeve according to an embodiment of the present utility model;

fig. 8 is a schematic structural diagram of a conductive pillar according to an embodiment of the present utility model;

fig. 9 is a schematic structural view of a flange according to an embodiment of the present utility model.

Reference numerals illustrate: 10. a motor; 100. a vacuum electrode assembly; 110. a conductive post; 111. a first pole segment; 112. a second pole segment; 113. a third pole segment; 120. a flange; 121. a land portion; 122. a connecting sleeve part; 1221. an annular groove; 130. a ceramic sleeve; 131. a main sleeve body; 1311. a penetrating portion; 1312. an exposed portion; 132. a convex ring; 1321. an annular protrusion; 140. a first kovar member; 141. a first kovar sleeve; 150. a second kovar member; 151. a second kovar sleeve; 1511. a first bore section; 1512. a second bore section; 1513. a third bore section; 1514. a step surface; 160. a seal ring; 170. a first wire nose; 180. a second wire nose; 101. spacing; 200. a motor body; 210. a vacuum housing; 211. a vacuum lumen; 220. and (3) winding.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that all directional indications (such as up, down, left, right, front, and rear … …) in the embodiments of the present utility model are merely used to explain the relative positional relationship between the components, the movement condition, etc. in a specific posture, and if the specific posture is changed, the directional indication is changed accordingly.

Furthermore, the description of "first," "second," etc. in this disclosure is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present utility model.

Referring to fig. 1 and 2, a vacuum electrode assembly 100 according to an embodiment of the present utility model is a vacuum feeder, and is mainly used for electrically connecting a vacuum device with an external cable. Specifically, after the vacuum electrode assembly 100 is mounted on the vacuum apparatus, one end of the vacuum electrode assembly 100 is inserted into the vacuum apparatus for electrical connection with a wiring member in the vacuum apparatus, and the other end is protruded outside the vacuum apparatus for electrical connection with an external cable.

Referring to fig. 1 and 2, as an implementation, the vacuum apparatus in this example is a motor 10 of a flywheel energy storage device, and a vacuum electrode assembly 100 is used to serve as a lead of the motor 10. The motor 10 has a vacuum housing 210, and the vacuum electrode assembly 100 is penetratingly coupled to the vacuum housing 210. The vacuum case 210 is formed with a vacuum cavity 211, and one end of the vacuum electrode assembly 100 is inserted into the vacuum cavity 211. Specifically, after the vacuum electrode assembly 100 is mounted on the vacuum housing 210, one end of the vacuum electrode assembly 100 is located in a vacuum environment inside the vacuum housing 210, and the other end of the vacuum electrode assembly 100 is located in an atmosphere outside the vacuum housing 210. Of course, in specific applications, the vacuum electrode assembly 100 of the present embodiment is not limited to use in flywheel energy storage devices, but may be used for electrical connection of other vacuum devices to external cables.

Referring to fig. 2 and 3, as an embodiment, the vacuum electrode assembly 100 includes a conductive post 110, a flange 120, and a ceramic sleeve 130, one end of the conductive post 110 is disposed to penetrate inside the vacuum casing 210, and the other end is disposed to penetrate outside the vacuum casing 210. The flange 120 is adapted to be coupled to the vacuum housing 210. The ceramic sleeve 130 is disposed between the flange 120 and the partial conductive post 110 along the radial direction of the conductive post 110, that is: the ceramic sleeve 130 is sleeved outside the ceramic sleeve 130, and the flange 120 is sleeved outside the ceramic sleeve 130. The conductive post 110 is mainly used to electrically connect the vacuum apparatus with an external cable. The flange 120 is mainly used to achieve mechanical connection of the vacuum electrode assembly 100 to a vacuum apparatus. The ceramic sleeve 130 is mainly used for realizing insulation connection between the conductive column 110 and the flange 120, so that insulation connection between the conductive column 110 and the vacuum shell 210 is realized, and the safety and reliability of the vacuum electrode assembly 100 in use are ensured.

Referring to fig. 3 and 5, as an embodiment, the vacuum electrode assembly 100 further includes a first kovar member 140, the first kovar member 140 being disposed between the flange 120 and the ceramic sleeve 130 in a radial direction of the conductive post 110 for connecting the flange 120 and the ceramic sleeve 130. Specifically, the first kovar member 140 is disposed outside the ceramic sleeve 130 along the radial direction of the conductive post 110, and the flange 120 is disposed outside the first kovar member 140 along the radial direction of the conductive post 110. The first kovar member 140 is a member made of kovar. The kovar alloy is also called sealing alloy or constant expansion alloy, has an expansion coefficient similar to that of ceramic, and has good processability, welding performance and sealing performance. In the embodiment, the first kovar alloy member 140 is arranged between the flange 120 and the ceramic sleeve 130, so that the characteristic that the thermal expansion coefficient of the kovar alloy is close to that of the ceramic can be utilized, and the first kovar alloy member 140 and the ceramic sleeve 130 have better contact sealing performance; and the first kovar alloy member 140 and the ceramic sleeve 130 can be expanded substantially synchronously when heated, so that stress generated by expansion is prevented from being concentrated in the ceramic sleeve 130, and adverse phenomena that the ceramic sleeve 130 is expanded and extruded and cracked are reduced.

Referring to fig. 3 and 5, as an embodiment, the first kovar member 140 includes at least two first kovar sleeves 141, at least two first kovar sleeves 141 are all disposed between the flange 120 and the ceramic sleeve 130, and at least two first kovar sleeves 141 are sequentially connected in an axial direction of the conductive column 110, so that a problem of too concentrated stress due to too long length of a single first kovar sleeve 141 can be prevented, thereby advantageously securing the service life of the vacuum electrode assembly 100. Of course, in a specific application, the arrangement of the first kovar member 140 is not limited thereto, and for example, as an alternative embodiment, the first kovar member 140 may also include only one first kovar sleeve 141.

As one embodiment, the first kovar member 140 includes two first kovar sleeves 141, and the two first kovar sleeves 141 are sequentially connected in the axial direction of the conductive column 110. Of course, in particular applications, the first kovar member 140 may also include three or more first kovar sleeves 141 as an alternative embodiment.

Referring to fig. 3 and 4, as an embodiment, the vacuum electrode assembly 100 further includes a second kovar member 150, one end of the second kovar member 150 is sleeved outside the end of the ceramic sleeve 130 remote from the vacuum housing 210, and the other end of the second kovar member 150 is sleeved outside the conductive column 110. The second kovar alloy member 150 can not only axially and radially position the ceramic sleeve 130, but also reduce the adverse phenomena of expansion and extrusion fracture of the ceramic sleeve 130 by utilizing the characteristic that the thermal expansion coefficient of the kovar alloy is close to that of the ceramic.

Referring to fig. 3, 4 and 6, as one embodiment, the second kovar member 150 includes a second kovar sleeve 151, the second kovar sleeve 151 being formed with a first bore section 1511 and a second bore section 1512, the bore diameter of the first bore section 1511 being greater than the bore diameter of the second bore section 1512. A first hole section 1511 is formed at one end of the second kovar sleeve 151 for mating with the ceramic sleeve 130, and a second hole section 1512 is formed at the other end of the second kovar sleeve 151 for mating with the conductive post 110, namely: the inner peripheral surface of the first hole section 1511 is in contact with the outer peripheral surface of the ceramic sleeve 130, and the inner peripheral surface of the second hole section 1512 is in contact with the outer peripheral surface of the conductive post 110.

Referring to fig. 3, 4 and 6, as an embodiment, the second kovar sleeve 151 is further formed with a third hole section 1513, and the third hole section 1513 is disposed between the first hole section 1511 and the second hole section 1512 along the axial direction of the second kovar sleeve 151. The third hole section 1513 has a larger hole diameter than the second hole section 1512 and smaller hole diameter than the first hole section 1511. A step surface 1514 is formed between the first hole section 1511 and the third hole section 1513, and the step surface 1514 abuts against one axial end of the ceramic sleeve 130, so that axial limitation of the ceramic sleeve 130 can be achieved.

Referring to fig. 3, 4 and 7, as an embodiment, the ceramic sleeve 130 includes a main sleeve body 131 and a convex ring 132, and the convex ring 132 is protruded at least partially outside the outer circumferential surface of the main sleeve body 131. The first kovar member 140 is disposed between the flange 120 and the main sleeve 131 along a radial direction of the conductive post 110. The convex ring 132 can increase the creepage distance of the vacuum electrode assembly 100, thereby increasing the insulation resistance of the ceramic sleeve 130 and improving the insulation performance between the conductive column 110 and the vacuum housing 210.

Referring to fig. 3, 4 and 7, as an embodiment, the main casing 131 includes a penetrating portion 1311 and an exposed portion 1312, the penetrating portion 1311 is penetrated into the vacuum casing 210, the exposed portion 1312 is used to expose the outside of the vacuum casing 210, and the collar 132 is protruded from at least a partial outer circumferential surface of the exposed portion 1312. The first kovar member 140 is disposed between the flange 120 and the penetration 1311 along a radial direction of the conductive post 110. In this embodiment, by optimizing the setting position of the convex ring 132, the convex ring 132 not only can play a role in increasing the creepage distance, but also is beneficial to preventing the convex ring 132 from interfering with the cooperation between the ceramic sleeve 130 and the first kovar alloy member 140.

Referring to fig. 3, 4 and 7, as an embodiment, the collar 132 includes at least one ring-shaped protrusion 1321, which is simple in structure and easy to process and form, and the ring-shaped protrusion 1321 is beneficial to make the creepage distance between the conductive pillar 110 and the vacuum housing 210 uniform around the circumference. Of course, in a specific application, the arrangement of the convex ring 132 is not limited thereto, and for example, as an alternative embodiment, the convex ring 132 is a spiral protrusion, i.e., the convex ring 132 is generally externally threaded.

As one embodiment, the annular protrusion 1321 is a protrusion having a circular ring shape.

As one embodiment, the collar 132 includes three annular protrusions 1321, and the three annular protrusions 1321 are sequentially spaced apart along the axial direction of the ceramic sleeve 130. Of course, in particular applications, the number of male ring 132 including annular protrusions 1321 is not limited thereto, for example, as alternative embodiments, male ring 132 may also include two rings of annular protrusions 1321 or four rings of annular protrusions 1321 or more rings of annular protrusions 1321.

Referring to fig. 3 and 5, as an embodiment, there is a space 101 between the inner circumferential surface of the ceramic sleeve 130 and the outer circumferential surface of the conductive post 110, that is, the inner circumferential surface of the ceramic sleeve 130 does not contact the outer circumferential surface of the conductive post 110. In this embodiment, the creepage distance between the conductive posts 110 and the vacuum housing 210 can be further increased by the space 101 between the inner peripheral surface of the ceramic sleeve 130 and the outer peripheral surface of the conductive posts 110.

Referring to fig. 2, 3 and 8, as one embodiment, the conductive post 110 includes a first rod section 111, a second rod section 112 and a third rod section 113, and the first rod section 111, the second rod section 112 and the third rod section 113 are sequentially connected in an axial direction of the conductive post 110. The outer diameter of the first pole segment 111 and the outer diameter of the second pole segment 112 are both greater than the outer diameter of the second pole segment 112. The ceramic sleeve 130 is sleeved outside the second rod section 112, and a space 101 exists between the inner peripheral surface of the ceramic sleeve 130 and the outer peripheral surface of the second rod section 112. The first pole segment 111 is used for penetrating inside the vacuum housing 210 for electrical connection with a wiring component inside the vacuum apparatus, and the third pole segment 113 is used for penetrating outside the vacuum housing 210 for electrical connection with an external cable.

As an embodiment, one end of the second kovar member 150 is sleeved outside the third rod segment 113, that is: the inner peripheral surface of the second hole section 1512 is in contact with the outer peripheral surface of the third rod section 113.

Referring to fig. 3, 4 and 9, as an embodiment, the flange 120 includes a connection disc part 121 and a connection sleeve part 122, the connection disc part 121 being for being caught outside the vacuum housing 210 and being fastened to the vacuum housing 210; the connecting sleeve portion 122 is configured to extend from the connecting plate portion 121 and penetrate into the vacuum housing 210. The vacuum housing 210 has a through hole, and the connecting sleeve 122 is inserted into the vacuum housing 210 through the through hole. The outer peripheral surface of the connecting sleeve 122 abuts against the inner peripheral surface of the through hole. The outer diameter of the land portion 121 is larger than the inner diameter of the through hole. The inner peripheral surface of the connecting sleeve portion 122 abuts against the outer peripheral surface of the first kovar member 140. The connection disc portion 121 may be used to achieve axial limitation of the vacuum housing 210 to the flange 120 and to achieve mechanical connection of the flange 120 to the vacuum housing 210. The connecting sleeve 122 can be used to limit the radial position of the flange 120 by the vacuum housing 210, and to provide a channel for the conductive post 110 to be disposed within the wall of the vacuum housing 210.

As an embodiment, the connection plate 121 is fastened to the vacuum housing 210 by a screw, which is convenient to assemble and disassemble and convenient to maintain at a later stage.

As an embodiment, the flange 120 is a metal flange, that is, the flange 120 is a member made of metal, so that it is advantageous to ensure rigidity and hardness of the flange 120.

As an embodiment, the first kovar member 140 is welded to the flange 120, which is advantageous in ensuring the connection stability of the first kovar member 140 to the flange 120 and in ensuring the sealing effect of the first kovar member 140.

Referring to fig. 3, 4 and 5, as an embodiment, the vacuum electrode assembly 100 further includes a sealing ring 160, and the sealing ring 160 is used to seal the fit gap of the flange 120 and the vacuum envelope. The seal ring 160 is mainly used for air sealing, so as to prevent air leakage at the matching position of the flange 120 and the vacuum shell, thereby being beneficial to ensuring the vacuum degree in the vacuum shell.

As an embodiment, the number of the sealing rings 160 is more than two, that is, the vacuum electrode assembly 100 includes at least two sealing rings 160, and the at least two sealing rings 160 are used to seal the fit gap between the flange 120 and the vacuum casing, respectively. In this embodiment, the number of the sealing rings 160 is set to be more than two, so that at least two sealing structures can be formed in the fit gap between the flange 120 and the vacuum housing, thereby ensuring that when one sealing ring 160 is damaged, at least one other sealing ring 160 can play a sealing role, and further being beneficial to greatly reducing the occurrence of air leakage of the vacuum equipment during normal operation.

As an embodiment, at least one seal ring 160 is used to seal the fit gap between the outer peripheral surface of the connecting sleeve 122 and the vacuum housing 210, and the seal ring 160 is mainly used to seal the radial fit gap between the flange 120 and the vacuum housing; at least one other seal ring 160 is used to seal the fit gap between the axial end surface of the connecting disc portion 121 and the vacuum housing 210, and the seal ring 160 is mainly used to seal the fit gap between the flange 120 and the axial end surface of the vacuum housing. In this embodiment, at least two different sealing rings 160 are used to seal the radial fit gap between the flange 120 and the vacuum housing, and the axial end face fit gap, so that different sealing structures can be formed from different dimensions, and the sealing performance between the flange 120 and the vacuum housing is fully ensured. Of course, in particular applications, as an alternative embodiment, at least two seal rings 160 may also be used to seal the radial fit gap of flange 120 with the vacuum enclosure; alternatively, at least two seal rings 160 may be used to seal the axial end face mating gap of the flange 120 and the vacuum enclosure.

Referring to fig. 3, 4 and 5, as an embodiment, the number of the seal rings 160 is two, wherein one seal ring 160 is used to seal the fit gap between the outer circumferential surface of the connecting sleeve 122 and the vacuum housing 210; the other seal ring 160 is used to seal the fit clearance of the axial end face of the land portion 121 and the vacuum housing 210. Of course, in a specific application, the number of the seal rings 160 may be more than three as an alternative embodiment.

Referring to fig. 3, 4 and 9, as an embodiment, the outer circumferential surface of the connecting sleeve portion 122 is provided with an annular groove 1221, and one seal ring 160 is mounted in the annular groove 1221.

Referring to fig. 2, 4 and 8, as one embodiment, the vacuum electrode assembly 100 further includes a first wire nose 170, and the first wire nose 170 is fixedly coupled to the conductive post 110. And the first wire nose 170 is located within the vacuum housing 210 for electrical connection with a wiring member within the vacuum apparatus. Specifically, the first wire nose 170 is fixedly coupled to the first pole segment 111. In this embodiment, the wire nose is used to electrically connect the vacuum electrode assembly 100 to the internal wiring member of the vacuum apparatus, which is advantageous for ensuring the connection firmness and safety between the vacuum electrode assembly 100 and the internal wiring member of the vacuum apparatus.

As one embodiment, the first wire nose 170 is connected to the conductive post 110 by a screw. Of course, in a specific application, the connection manner of the first wire nose 170 and the conductive post 110 is not limited thereto, and for example, as an alternative embodiment, the first wire nose 170 is connected to the conductive post 110 by welding.

Referring to fig. 3, 4 and 8, as one embodiment, the vacuum electrode assembly 100 further includes a second wire nose 180, and the second wire nose 180 is fixedly coupled to the conductive post 110. And the second wire nose 180 is used to be exposed to the outside of the vacuum housing 210 for electrical connection with an external cable outside the vacuum apparatus. Specifically, the second wire nose 180 is fixedly coupled to the third pole segment 113. In this embodiment, the vacuum electrode assembly 100 is electrically connected to an external cable outside the vacuum apparatus by using a wire nose, which is advantageous for ensuring the connection firmness and safety between the vacuum electrode assembly 100 and the external cable.

As one embodiment, the vacuum electrode assembly 100 includes two first wire noses 170 and two second wire noses 180, and the two first wire noses 170 are respectively fixed to one ends of the conductive posts 110 for respectively electrically connecting with the wire members in the vacuum apparatus. Two second wire noses 180 are respectively fixed to the other ends of the conductive posts 110 for respectively electrically connecting with external cables outside the vacuum apparatus. In this embodiment, the number of the first wire noses 170 and the second wire noses 180 is two, and the two wire noses are mainly used for shunt to reduce the current magnitude on the single wire noses, thereby facilitating the reduction of the diameter size and weight of the single wire for connection with the single wire noses.

As an embodiment, the conductive posts 110 are copper posts, and the first and second wire noses 170 and 180 are copper noses, that is, the conductive posts 110, the first and second wire noses 170 and 180 are made of copper materials, so that the conductive performance is good, and the structural reliability is good. Of course, in particular applications, the conductive post 110, the first wire nose 170, and the second wire nose 180 may be made of other conductive materials as well, as alternative embodiments.

Referring to fig. 1, 2 and 3, the present embodiment also provides a motor 10, and the motor 10 includes a motor body 200 and the vacuum electrode assembly 100 described above. The motor body 200 comprises a vacuum shell 210 and a winding 220, wherein the vacuum shell 210 is provided with a vacuum inner cavity 211, and the winding 220 is arranged in the vacuum inner cavity 211; one end of the vacuum electrode assembly 100 is inserted into the vacuum chamber 211 and electrically connected to the winding 220. The wiring component in the vacuum apparatus is a winding 220. The motor 10 provided in this embodiment adopts the vacuum electrode assembly 100, so that on one hand, the air tightness of the vacuum housing 210 is improved, on the other hand, the long-term running stability and reliability of the motor 10 are ensured, and the service life of the motor 10 is ensured.

As one embodiment, the motor 10 is a three-phase motor 10, and the motor 10 includes three vacuum electrode assemblies 100 described above or six vacuum electrode assemblies 100 described above, and three or six vacuum electrode assemblies 100 are used to draw out three phase lines in the motor 10. Of course, in specific applications, the type of motor 10 and the number of vacuum electrode assemblies 100 are not limited thereto, and for example, as an alternative embodiment, the motor 10 may be a single-phase motor 10.

The embodiment also provides a flywheel energy storage device, which comprises a flywheel body and the motor 10, wherein the motor 10 is connected with the flywheel body. The flywheel energy storage device provided by the embodiment is beneficial to ensuring the stable reliability and the service life of the long-term operation of the flywheel energy storage device due to the adoption of the motor 10.

In the vacuum electrode assembly 100 provided in this embodiment, the working principle of each component is as follows:

1) The conductive posts 110 are employed as the primary conductors for conducting current to the motor 10.

2) By utilizing the characteristic that the expansion coefficient of the kovar alloy is close to that of the ceramic, the flange 120 and the ceramic sleeve 130 are reliably connected through the arrangement of the first kovar alloy member 140, namely, the flange 120 is fixed on the ceramic sleeve 130 through the first kovar alloy member 140.

3) The ceramic sleeve 130 is fixed on the conductive post 110 through the second kovar member 150 to play an insulating role; in addition, the convex ring 132 on the ceramic sleeve 130 can improve the creepage distance of the vacuum electrode assembly 100, thereby improving the insulation resistance of the ceramic sleeve 130 and improving the insulation performance of the ceramic sleeve 130.

4) The front end of the conductive post 110 is connected to a second wire nose 180 for connection with an external cable. The rear end of the conductive post 110 is screwed to one end of the first wire nose 170, and the other end of the first wire nose 170 is used to connect the wire harness (i.e., the wire harness of the winding 220) of the motor 10.

5) The sealing ring 160 plays a sealing role, and the installation of 2 sealing rings 160 is for making redundant design, so that the normal operation is ensured without air leakage.

The foregoing description is only of the preferred embodiments of the present utility model and is not intended to limit the scope of the utility model, and all equivalent structural changes made by the description of the present utility model and the accompanying drawings or direct/indirect application in other related technical fields are included in the scope of the utility model.

Claims (10)

1. A vacuum electrode assembly, characterized in that: comprising the following steps:

one end of the conductive column is used for penetrating into the vacuum shell, and the other end of the conductive column is used for penetrating out of the vacuum shell;

the flange is used for being connected with the vacuum shell;

the ceramic sleeve is arranged between the flange and the local conductive column along the radial direction of the conductive column;

the first kovar alloy member is arranged between the flange and the ceramic sleeve along the radial direction of the conductive column and is used for connecting the flange and the ceramic sleeve.

2. The vacuum electrode assembly of claim 1, wherein: the first kovar member includes a first kovar sleeve; or,

the first kovar alloy member comprises at least two first kovar alloy sleeves, the at least two first kovar alloy sleeves are arranged between the flange and the ceramic sleeve, and the at least two first kovar alloy sleeves are sequentially connected along the axial direction of the conductive column.

3. The vacuum electrode assembly of claim 1, wherein: the vacuum electrode assembly further comprises a second kovar alloy member, one end of the second kovar alloy member is sleeved outside the end part of the ceramic sleeve, which is far away from the vacuum shell, and the other end of the second kovar alloy member is sleeved outside the conductive column; and/or the number of the groups of groups,

the first kovar member is welded to the flange.

4. A vacuum electrode assembly according to any one of claims 1 to 3, wherein: the ceramic sleeve comprises a main sleeve body and a convex ring, wherein the convex ring is convexly arranged outside at least partial peripheral surface of the main sleeve body.

5. The vacuum electrode assembly of claim 4, wherein: the convex ring comprises at least one circle of annular bulges; or,

the convex ring is a spiral bulge.

6. The vacuum electrode assembly of claim 5, wherein: the main sleeve body comprises a penetrating part and an exposed part, the penetrating part penetrates through the vacuum shell, the exposed part is used for exposing out of the vacuum shell, and the convex ring is convexly arranged on the outer peripheral surface of at least part of the exposed part; and/or the number of the groups of groups,

and a space exists between the inner peripheral surface of the ceramic sleeve and the outer peripheral surface of the conductive column.

7. A vacuum electrode assembly according to any one of claims 1 to 3, wherein: the vacuum electrode assembly further comprises at least two sealing rings, and the at least two sealing rings are respectively used for sealing the fit clearance between the flange and the vacuum shell.

8. The vacuum electrode assembly of claim 7, wherein: the flange comprises a connecting disc part and a connecting sleeve part, and the connecting disc part is used for being clamped outside the vacuum shell and is fixedly connected with the vacuum shell;

the connecting sleeve part is used for extending from the connecting disc part to penetrate through the vacuum shell;

at least one sealing ring is used for sealing a fit gap between the outer peripheral surface of the connecting sleeve part and the vacuum shell;

at least one other sealing ring is used for sealing the fit clearance between the axial end face of the connecting disc part and the vacuum shell.

9. An electric motor, characterized in that: comprising the following steps:

the motor comprises a motor body, wherein the motor body comprises a vacuum shell and a winding, a vacuum inner cavity is formed in the vacuum shell, and the winding is arranged in the vacuum inner cavity;

the vacuum electrode assembly of any one of claims 1 to 8, one end of the vacuum electrode assembly being disposed through the vacuum lumen and electrically connected to the winding.

10. A flywheel energy storage device, characterized in that: comprising a flywheel body and a motor according to claim 9, said motor being connected to said flywheel body.