CN219659526U - Flywheel energy storage device - Google Patents

Abstract

The utility model relates to the technical field of electric energy storage and discloses a flywheel energy storage device, which comprises a driving mechanism, a shell, a flywheel rotor, a first electromagnet and a second electromagnet, wherein the driving mechanism is used for providing driving force, the flywheel rotor is arranged in the shell and is rotationally connected with the driving mechanism, the first electromagnet is arranged in the shell and is opposite to the top surface of the flywheel rotor, the second electromagnet is arranged in the shell and is opposite to the top surface of the flywheel rotor, and the first electromagnet and the second electromagnet can apply attractive force to the flywheel rotor together in an electrified state. The flywheel energy storage device solves the problem that permanent magnets are difficult to assemble in the existing flywheel rotor unloading technology.

Description

Flywheel energy storage device

Technical Field

The utility model relates to the technical field of electric energy storage, in particular to a flywheel energy storage device.

Background

The existing flywheel energy storage device usually adopts an electromagnet and permanent magnet mode to unload the flywheel rotor, but the technology for unloading the flywheel rotor has the problem of difficult assembly of the permanent magnet.

Disclosure of Invention

The embodiment of the utility model provides a flywheel energy storage device, which aims to solve the problem that permanent magnets are difficult to assemble in the existing flywheel rotor unloading technology.

The embodiment of the utility model provides a flywheel energy storage device, which comprises:

a driving mechanism for providing a driving force;

a housing;

the flywheel rotor is arranged in the shell and is rotationally connected with the driving mechanism;

the first electromagnet is arranged in the shell and is opposite to the top surface of the flywheel rotor; a kind of electronic device with high-pressure air-conditioning system

The second electromagnet is arranged in the shell and is opposite to the top surface of the flywheel rotor;

wherein the first electromagnet and the second electromagnet can simultaneously apply attractive force to the flywheel rotor in an energized state.

In some embodiments, the first electromagnet comprises a first coil disposed opposite the top surface of the flywheel rotor and a first iron core adapted to the first coil;

the second electromagnet comprises a second coil and a second iron core, the second coil is arranged opposite to the top surface of the flywheel rotor, the second iron core is matched with the second coil, and the second iron core is arranged at intervals with the first iron core.

In some embodiments, at least one of the first core and the second core is a toroidal core;

the first iron core and the second iron core are detachably connected with the shell.

In some embodiments, the first core includes a first core portion and a second core portion, the first core portion and the second core portion being connected and forming a first groove, the first coil being received in the first groove.

In some embodiments, the second core includes a third core portion and a fourth core portion, the third core portion and the fourth core portion being connected and forming a second recess, the second coil being received in the second recess.

In some embodiments, the number of turns of the first coil is the same as the number of turns of the second coil;

and/or the wire diameter of the first coil is the same as the wire diameter of the second coil.

In some embodiments, the flywheel energy storage device further comprises a shock absorbing assembly connected to the housing;

when the flywheel energy storage device is matched with a target device, the shell is elastically connected with the target device through the damping component.

In some embodiments, the flywheel energy storage device further comprises a coupling through which the drive mechanism is connected to the flywheel rotor.

In some embodiments, the flywheel energy storage device further comprises a first bearing assembly and a second bearing assembly, the first bearing assembly is disposed on a side of the housing adjacent to the top surface of the flywheel rotor, the second bearing assembly is disposed on a side of the housing adjacent to the bottom surface of the flywheel rotor, and the flywheel rotor is rotatably connected to the housing through the first bearing assembly and the second bearing assembly.

In some embodiments, the first bearing assembly comprises a self-aligning ball bearing and a first bearing mount;

and/or the second bearing assembly comprises an angular contact bearing and a second bearing fixing seat.

The embodiment of the utility model provides a flywheel energy storage device, which comprises a driving mechanism, a shell, a flywheel rotor, a first electromagnet and a second electromagnet, wherein the driving mechanism is used for providing driving force, the flywheel rotor is arranged in the shell and is rotationally connected with the driving mechanism, the first electromagnet is arranged in the shell and is opposite to the top surface of the flywheel rotor, the second electromagnet is arranged in the shell and is opposite to the top surface of the flywheel rotor, and the first electromagnet and the second electromagnet can apply attractive force to the flywheel rotor together in an electrified state. By adopting the first electromagnet and the second electromagnet to provide attractive force for the flywheel rotor together in the electrified state, the problem of difficult assembly of the permanent magnet in the existing flywheel rotor unloading technology is solved.

Drawings

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

Fig. 1 is a schematic structural diagram of a flywheel energy storage device according to an embodiment of the present utility model;

fig. 2 is a schematic structural cross-sectional view of a first electromagnet and a second electromagnet according to an embodiment of the present utility model;

FIG. 3 is an enlarged view of a portion of a first bearing assembly provided in an embodiment of the present utility model;

fig. 4 is a partial enlarged view of a second bearing assembly, a pressure sensor, a tension sensor, and a displacement sensor according to an embodiment of the present utility model.

Reference numerals illustrate: 100. flywheel energy storage device; 101. a driving mechanism; 102. a housing; 103. a flywheel rotor; 104. a first electromagnet; 1041. a first coil; 1042. a first iron core; 1043. a first core part; 1044. a second core part; 105. a second electromagnet; 1051. a second coil; 1052. a second iron core; 1053. a third core part; 1054. a fourth core part; 106. a shock absorbing assembly; 107. a coupling; 108. a first bearing assembly; 1081. a self-aligning ball bearing; 1082. a first bearing holder; 109. a second bearing assembly; 1091. angular contact bearings; 1092. a second bearing fixing seat; 110. a motor bracket; 111. a pressure sensor; 112. a pull force touch sensor; 113. a displacement sensor.

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 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.

In the description of the present utility model, unless explicitly stated and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

The flywheel energy storage device is a physical energy storage device for storing energy through a flywheel rotating at a high speed, and the main principle is as follows: when the electric energy storage flywheel is charged, the flywheel is driven to rotate in an accelerating way through the motor, so that electric energy is converted into rotational kinetic energy of the flywheel, when the electric energy storage flywheel is discharged, the motor works in a generator state, and the energy storage flywheel drives the generator rotor to rotate so as to convert mechanical energy into electric energy. The flywheel energy storage has the advantages of high energy storage density, high instantaneous power, quick charging, long service life, no pollution and the like, so the flywheel energy storage technology is valued by various industries, is considered to be the most promising energy storage technology, and has wide application prospect in the industries of aviation, electric power, automobiles and the like.

In order to reduce bearing friction of the flywheel energy storage device, the flywheel rotor in the flywheel energy storage device is usually required to be unloaded, in the prior art, the method for unloading the flywheel rotor mainly adopts a mode of combining an electromagnet and a permanent magnet to unload the flywheel rotor, but the permanent magnet always has magnetism, so that the technology for unloading the flywheel rotor has the problem of difficult assembly of the permanent magnet.

Therefore, the embodiment of the utility model provides a flywheel energy storage device, which aims to solve the problem that the permanent magnet assembly is difficult in the existing flywheel rotor unloading technology.

Some embodiments of the present utility model will be described in detail below with reference to the accompanying drawings, and the features of the following examples and embodiments may be combined with each other without conflict.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a flywheel energy storage device 100 according to an embodiment of the present utility model, as shown in fig. 1, the flywheel energy storage device 100 includes a driving mechanism 101, a housing 102, a flywheel rotor 103, a first electromagnet 104 and a second electromagnet 105, wherein the driving mechanism 101 is used for providing driving force, the flywheel rotor 103 is disposed in the housing 102 and is rotationally connected with the driving mechanism 101, the first electromagnet 104 is disposed in the housing 102 and is disposed opposite to a top surface of the flywheel rotor 103, the second electromagnet 105 is disposed in the housing 102 and is disposed opposite to the top surface of the flywheel rotor 103, and the first electromagnet 104 and the second electromagnet 105 can apply attractive force to the flywheel rotor 103 together in an energized state.

The drive mechanism 101 has a dual function of a generator and a motor, and for example, the drive mechanism 101 is an ac exciting motor. The driving mechanism 101 may be provided inside the housing 102 or outside the housing 102. When the driving mechanism 101 is disposed in the housing 102, the driving mechanism 101 may be disposed at a side of the first electromagnet 104 and the second electromagnet 105 away from the flywheel rotor 103, spaced from the first electromagnet 104 and the second electromagnet 105, or disposed opposite to the bottom of the flywheel rotor 103; when the driving mechanism 101 is disposed outside the housing 102, the driving mechanism 101 may be disposed on the top of the housing 102 or opposite to the top of the housing 102, or may be disposed on the bottom of the housing 102 or opposite to the bottom of the housing 102, and the specific position of the driving mechanism 101 is not limited in the present utility model, so long as the driving mechanism 101 and the flywheel rotor 103 can be rotationally connected.

Illustratively, as shown in FIG. 1, the drive mechanism 101 is disposed outside of the housing 102 and opposite the top of the housing 102.

As shown in fig. 1 and 2, in some embodiments, the first electromagnet 104 includes a first coil 1041 disposed opposite to the top surface of the flywheel rotor 103 and a first core 1042 adapted to the first coil 1041, the second electromagnet 105 includes a second coil 1051 disposed opposite to the top surface of the flywheel rotor 103 and a second core 1052 adapted to the second coil 1051, and the second core 1052 is spaced apart from the first core 1042.

The first electromagnet 104 and the second electromagnet 105 can apply attractive force to the flywheel rotor 103 in a powered state, so that the flywheel rotor 103 is in a suspended state, and the suspended flywheel rotor 103 has no mechanical friction, so that not only is the loss of a bearing reduced, but also high-speed rotation of the flywheel rotor 103 can be realized, and the attractive force is applied to the flywheel rotor 103 in the powered state through the first electromagnet 104 and the second electromagnet 105, so that the occurrence of the condition that the flywheel falls after any one of the first electromagnet 104 and the second electromagnet 105 fails can be prevented.

In some embodiments, as shown in fig. 2, at least one of the first core 1042 and the second core 1052 is a toroidal core, wherein both the first core 1042 and the second core 1052 are removably connected with the housing 102.

When the first iron core 1042 is a toroidal iron core, the first coil 1041 adapted to the first iron core 1042 is also a toroidal coil, and when the second iron core 1052 is a toroidal iron core, the second coil 1051 adapted to the second iron core 1052 is also a toroidal coil, by setting the iron cores as toroidal iron cores, when the first electromagnet 104 and the second electromagnet 105 apply attractive force to the flywheel rotor 103 to make the flywheel rotor 103 in a suspended state, the force applied to the flywheel rotor 103 is uniform, so that the flywheel rotor 103 is in a balanced state in the horizontal direction, and preferably, the first iron core 1042 and the second iron core 1052 are both toroidal iron cores. The first core 1042 and the second core 1052 are detachably connected with the housing 102, and when the first core 1042 and the second core 1052 fail, the first core 1042 and the first core 1042 can be detached from the housing 102 for maintenance.

In some embodiments, as shown in fig. 2, the first core 1042 includes a first core portion 1043 and a second core portion 1044, the first core portion 1043 and the second core portion 1044 are connected and form a first groove, and the first coil 1041 is received in the first groove.

By accommodating the first coil 1041 in the first groove, the first coil 1041 can be well protected, so that the service life of the first electromagnet 104 is prolonged.

In some embodiments, the second core 1052 includes a third core portion 1053 and a fourth core portion 1054, the third core portion 1053 and the fourth core portion 1054 being connected and forming a second slot in which the second coil 1051 is received.

The second coil 1051 is accommodated in the second groove, so that the second coil 1051 can be well protected, and the service life of the second electromagnet 105 can be prolonged.

In some embodiments, the number of turns of the first coil 1041 is the same as the number of turns of the second coil 1051; and/or the wire diameter of the first coil 1041 is the same as the wire diameter of the second coil 1051.

As shown in fig. 1, in some embodiments, the flywheel energy storage device 100 further includes a damper assembly 106, the damper assembly 106 being coupled to the housing 102; when the flywheel energy storage device 100 is mated with the target device, the housing 102 is resiliently coupled to the target device via the damper assembly 106.

The target device may be a vehicle such as an automobile, a high-speed rail, a subway, or the like, an aerospace device, a USP power supply, a wind driven generator, or the like, and the vibration of the target device caused by the rotation of the flywheel rotor 103 may be reduced by arranging the damper assembly 106 on the housing 102 of the flywheel energy storage device, and elastically connecting the housing 102 with the target device through the damper assembly 106. The damper assembly 106 may be any of a rubber damper, a spring damper, an air cushion damper, a damping damper.

As shown in fig. 1, in some embodiments, the flywheel energy storage device 100 further includes a coupling 107, and the drive mechanism 101 is coupled to the flywheel rotor 103 via the coupling 107.

The coupling 107 connects the driving mechanism 101 and the flywheel rotor 103, so that vibration caused by the driving mechanism 101 and the flywheel rotor 103 in the power transmission process can be reduced, and the stability of the driving mechanism 101 and the flywheel rotor 103 can be improved. The coupling 107 may be any one of a flange coupling, a sleeve coupling, and a pod coupling.

As shown in fig. 1, in some embodiments, the flywheel energy storage device 100 further includes a first bearing assembly 108 and a second bearing assembly 109, the first bearing assembly 108 being disposed on a side of the housing 102 adjacent to a top surface of the flywheel rotor 103, the second bearing assembly 109 being disposed on a side of the housing 102 adjacent to a bottom surface of the flywheel rotor 103, the flywheel rotor 103 being rotatably coupled to the housing 102 via the first bearing assembly 108 and the second bearing assembly 109.

By rotationally coupling the flywheel rotor 103 with the housing 102 via the first and second bearing assemblies 108, 109, friction of the flywheel rotor 103 during rotation may be reduced.

As shown in fig. 3, 4, in some embodiments, the first bearing assembly 108 includes a self-aligning ball bearing 1081 and a first bearing mount 1082; and/or the second bearing assembly 109 includes an angular contact bearing 1091 and a second bearing mount 1092.

As shown in fig. 1, in some embodiments, the flywheel energy storage device 100 further includes a motor bracket 110, the motor bracket 110 is connected with the housing 102, and the driving mechanism 101 is disposed on the motor bracket 110, so that the motor bracket 110 may be configured as a hollow structure to reduce the mass of the flywheel energy storage device 100.

As shown in fig. 1 and 4, in some embodiments, the flywheel energy storage device 100 further includes a control device (not shown) and a pressure sensor 111, where the pressure sensor 111 is disposed at the bottom of the angular contact bearing 1091, and the control device includes a controller and a fault detector (not shown), where the controller is communicatively connected to the pressure sensor 111, the first electromagnet 104, the second electromagnet 105, and the fault detector, the pressure sensor 111 is used to measure the gravity of the flywheel rotor 103 and send the measurement result to the controller, and the detector is used to detect the working states of the first electromagnet 104 and the second electromagnet 105 and send the detection result to the controller, and the controller adjusts the working states of the first electromagnet 104 or the second electromagnet 105 according to the measurement result and the detection result.

When the working states of the first electromagnet 104 and the second electromagnet 105 are normal, the flywheel rotor 103 is in a suspended state, the gravity of the flywheel rotor 103 detected by the pressure sensor 111 is zero, when any one of the first electromagnet 104 and the second electromagnet 105 fails, the gravity of the flywheel rotor 103 detected by the pressure sensor 111 is not zero, when the detector detects that the first electromagnet 104 fails, the controller adjusts the working current of the second electromagnet 105 according to the measurement result to make the measurement result be zero, and when the detector detects that the second electromagnet 105 fails, the controller adjusts the working current of the first electromagnet 104 according to the measurement result to make the measurement result be zero. In the embodiment, the working states of the first electromagnet 104 and the second electromagnet 105 are monitored in real time through the pressure sensor 111 and the control device, and when one of the first electromagnet 104 and the second electromagnet 105 fails, the controller adjusts the working current of the other of the first electromagnet 104 and the second electromagnet 105 through the pressure value measured by the pressure sensor 111, so that the occurrence of the condition that the flywheel rotor 103 falls caused by the failure of any one of the first electromagnet 104 and the second electromagnet 105 is prevented.

As shown in fig. 1 and 4, in some embodiments, the flywheel energy storage device 100 further includes a controller (not shown) and a tension sensor 112, where the tension sensor 112 is disposed on the second bearing fixing seat 1092 and is elastically connected to the flywheel rotor 103, the controller is communicatively connected to the tension sensor 112, the first electromagnet 104, and the second electromagnet 105, the tension sensor 112 is configured to measure an upward tension value of the flywheel rotor 103 when the first electromagnet 104 and the second electromagnet 105 provide attractive force to the flywheel rotor 103, and send the measurement result of the tension value to the controller, and when the tension value is greater than a tension preset value, the controller adjusts an operating current of the first electromagnet 104 and/or the second electromagnet 105 according to a difference between the tension value and the tension preset value, so that the tension value is less than or equal to the preset tension value. Wherein the pull force value is the attractive force minus the gravitational force of the flywheel rotor 103.

When the tension value is greater than a preset tension value, the flywheel rotor 103 may move upward, and when the tension value is greater than the preset tension value, the controller adjusts the working current of the first electromagnet 104 and/or the second electromagnet 105 to make the tension value smaller than or equal to the preset tension value, so as to prevent the flywheel rotor 103 from moving upward.

As shown in fig. 1 and 4, in some embodiments, the flywheel energy storage device 100 further includes a controller (not shown) and a displacement sensor 113, where the displacement sensor 113 is used to measure the axial displacement of the flywheel rotor 103, the controller is communicatively connected to the displacement sensor 113, the first electromagnet 104, and the second electromagnet 105, and when the displacement sensor 113 detects that the flywheel rotor 103 moves axially, the movement state of the flywheel rotor 103 is sent to the controller, and the controller adjusts the working currents of the first electromagnet 104 and the second electromagnet 105 according to the movement state of the flywheel rotor 103, so that the flywheel rotor 103 is in a static state.

According to the flywheel energy storage device 100 provided by the embodiment of the utility model, attractive force is applied to the flywheel rotor 103 through the first electromagnet 104 and the second electromagnet 105 in the electrified state, so that the flywheel rotor 103 is in a suspended state, the loss of a bearing is reduced, the high-speed operation of the flywheel rotor 103 is realized, and the problem of difficult assembly of the permanent magnet in the existing flywheel rotor unloading technology is solved.

It is to be understood that the terminology used in the description of the utility model herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. As used in this specification and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

It should also be understood that the term "and/or" as used in the present specification and the appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes such combinations. It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or system. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or system that comprises the element.

The foregoing embodiment numbers of the present utility model are merely for the purpose of description, and do not represent the advantages or disadvantages of the embodiments. While the utility model has been described with reference to certain preferred embodiments, it will be understood by those skilled in the art that various changes and substitutions of equivalents may be made and equivalents will be apparent to those skilled in the art without departing from the scope of the utility model. Therefore, the protection scope of the utility model is subject to the protection scope of the claims.

Claims (10)

1. A flywheel energy storage device, comprising:

a driving mechanism for providing a driving force;

a housing;

the flywheel rotor is arranged in the shell and is rotationally connected with the driving mechanism;

the first electromagnet is arranged in the shell and is opposite to the top surface of the flywheel rotor; a kind of electronic device with high-pressure air-conditioning system

The second electromagnet is arranged in the shell and is opposite to the top surface of the flywheel rotor;

wherein the first electromagnet and the second electromagnet can simultaneously apply attractive force to the flywheel rotor in an energized state.

2. The flywheel energy storage device of claim 1, wherein the first electromagnet comprises a first coil disposed opposite a top surface of the flywheel rotor and a first iron core adapted to the first coil;

the second electromagnet comprises a second coil and a second iron core, the second coil is arranged opposite to the top surface of the flywheel rotor, the second iron core is matched with the second coil, and the second iron core is arranged at intervals with the first iron core.

3. The flywheel energy storage device of claim 2, wherein at least one of the first core and the second core is a toroidal core;

the first iron core and the second iron core are detachably connected with the shell.

4. The flywheel energy storage device of claim 2, wherein the first iron core comprises a first iron core portion and a second iron core portion, the first iron core portion and the second iron core portion being connected and forming a first recess, the first coil being received in the first recess.

5. The flywheel energy storage device of claim 2, wherein the second core comprises a third core portion and a fourth core portion, the third core portion and the fourth core portion being connected and forming a second recess, the second coil being received in the second recess.

6. The flywheel energy storage device of claim 2, wherein the number of turns of the first coil and the number of turns of the second coil are the same;

and/or the wire diameter of the first coil is the same as the wire diameter of the second coil.

7. The flywheel energy storage device of any of claims 1-6, further comprising a shock assembly connected to the housing;

when the flywheel energy storage device is matched with a target device, the shell is elastically connected with the target device through the damping component.

8. The flywheel energy storage device of any of claims 1-6, further comprising a coupling through which the drive mechanism is connected to the flywheel rotor.

9. The flywheel energy storage device of any of claims 1-6, further comprising a first bearing assembly and a second bearing assembly, the first bearing assembly disposed within the housing on a side proximate a top surface of the flywheel rotor, the second bearing assembly disposed within the housing on a side proximate a bottom surface of the flywheel rotor, the flywheel rotor rotatably coupled to the housing via the first bearing assembly and the second bearing assembly.

10. The flywheel energy storage device of claim 9, wherein the first bearing assembly comprises a self-aligning ball bearing and a first bearing mount;

and/or the second bearing assembly comprises an angular contact bearing and a second bearing fixing seat.