Gravity energy storage device based on linear motor
By using a gravity energy storage device based on a linear motor, and by coordinating the motor unit and the weight block circulation unit, the problems of insufficient and unstable output power in existing gravity energy storage systems have been solved, achieving stable power output and high-quality power.
Patent Information
- Application Number
- CN202520488561.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-19
- Publication Date
- 2026-01-23
- Estimated Expiration
- 2035-03-19
AI Technical Summary
Existing vertical shaft or frame-type gravity energy storage systems suffer from insufficient system output power, unstable output power, and low power quality, making it impossible to achieve stable power generation.
A gravity energy storage device based on a linear motor is adopted. Through the cooperation of the motor part and the weight block circulation part, the motor part can be used as a linear motor when storing energy and as a linear generator when generating electricity. Stable power output is generated by the relative position change of the stator assembly and the mover assembly.
It achieves stable power output under the same channel, improves power quality, solves the problem of power fluctuation, and enhances power quality during the grid connection phase.
Smart Images
Figure CN223825184U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of gravity energy storage devices, in particular to a gravity energy storage device based on a linear motor. BACKGROUND
[0002] Gravity energy storage is a method of storing energy using gravitational potential energy. The basic principle is to store energy by lifting gravity power blocks to a high place, and when energy needs to be released, the gravity power blocks are lowered to drive the generator to generate electricity.
[0003] The existing vertical shaft type or frame type gravity energy storage system is limited by the size of the heavy blocks and the scale of the system, and has the problems of insufficient system output power and unstable system output power, and low output power quality in the grid-connected stage, which cannot realize stable power generation.
[0004] Therefore, it is necessary to design a gravity energy storage device based on a linear motor to solve the above problems. CONTENT OF THE INVENTION
[0005] Therefore, in order to overcome the defects of the prior art, the present application provides a gravity energy storage device based on a linear motor, which effectively solves the problems of insufficient system output power and unstable system output power of the existing gravity energy storage device, and low output power quality in the grid-connected stage, which cannot realize stable power generation.
[0006] According to the gravity energy storage device based on the linear motor, the gravity energy storage device based on the linear motor comprises a motor part and a heavy block circulation part, the heavy block circulation part comprises a circulation channel, a circulation assembly and a bearing mechanism, the bearing mechanism reciprocates in the inside of the circulation channel through the circulation assembly, the motor part comprises a stator assembly and a rotor assembly, the rotor assembly is arranged on one side of the bearing mechanism close to the side wall of the circulation channel, and the stator assembly is arranged on the side wall of the circulation channel.
[0007] Preferably, the circulation assembly comprises a rotating wheel and a connecting piece, the connecting piece surrounds the rotating wheel, and the two ends of the connecting piece are respectively provided with one bearing mechanism.
[0008] Preferably, one side of each bearing mechanism close to the side wall of the circulation channel is provided with the rotor assembly, and each rotor assembly corresponds to one stator assembly.
[0009] Preferably, the stator assembly comprises a plurality of stator bodies, the plurality of stator bodies are arranged on a plurality of inner wall surfaces connected with each other of the circulation channel, and the plurality of stator bodies surround the rotor assembly.
[0010] Preferably, the gravity energy storage device based on a linear motor further includes a conveying unit, which includes a conveying channel and a weight block body, and the weight block body is transported to the interior of the bearing mechanism via the conveying channel.
[0011] Preferably, the circulation channel is formed as a vertical shaft structure, and the conveying channel is located at the end of the vertical shaft structure.
[0012] Preferably, the conveying channel is a conveyor belt.
[0013] Preferably, the gravity energy storage device based on a linear motor includes an energy storage mode and a power generation mode, and the gravity energy storage device based on a linear motor can switch between the energy storage mode and the power generation mode.
[0014] Preferably, when the gravity energy storage device based on the linear motor is in energy storage mode, the motor unit functions as a linear motor, and the linear motor drives the circulation component to move.
[0015] Preferably, when the gravity energy storage device based on the linear motor is in power generation mode, the motor part acts as a linear generator, the stator assembly is connected to the external power grid, and the movement of the circulation assembly drives the displacement of the mover assembly.
[0016] According to the present invention, the gravity energy storage device based on a linear motor, through the cooperation of the motor part and the weight block circulation part, enables the motor part to act as a linear motor during energy storage and as a linear generator during power generation, thereby achieving stable power output in the same channel. Since the entire device is used as a linear motor, the power fluctuations that occur during power generation or storage in the original gravity energy storage technology are avoided, resulting in high-quality output power during grid connection and stable power generation.
[0017] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description
[0018] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.
[0019] Figure 1 A schematic diagram of a gravity energy storage device based on a linear motor according to an embodiment of the present invention is shown.
[0020] Figure 2A partial structural schematic diagram of a gravity energy storage device based on a linear motor according to an embodiment of the present invention is shown.
[0021] Figure 3 A front view of a gravity energy storage device based on a linear motor according to an embodiment of the present invention is shown.
[0022] Figure 4 A top view of a gravity energy storage device based on a linear motor according to an embodiment of the present invention is shown.
[0023] Reference numerals: 1-Circulation channel; 2-Bearing mechanism; 3-Motor body; 4-Stator body; 5-Rotating wheel; 6-Connecting part; 7-Conveyor belt; 8-Weight block body. Detailed Implementation
[0024] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.
[0025] In the description of the embodiments of this application, it should be noted that the terms "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this application is in use. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.
[0026] Furthermore, terms such as "horizontal" and "vertical" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.
[0027] In the description of the embodiments of this application, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "connect" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.
[0028] According to the present invention, a gravity energy storage device based on a linear motor is provided, such as... Figures 1 to 4 As shown, this gravity energy storage device based on a linear motor is used in the field of gravity energy storage technology. It can transport the weight block 8 from a low position to a high position for energy storage or transport the weight block 8 from a high position to a low position for power generation. The gravity energy storage device based on a linear motor includes a motor unit and a weight block circulation unit.
[0029] In the following description, reference will be made to Figures 1 to 4 This section describes the detailed structure of the motor section and the weight circulation section of the gravity energy storage device based on a linear motor.
[0030] like Figure 1 and Figure 2 As shown, in this embodiment, the heavy block circulation section is used for the reciprocating circulation of the heavy block body 8, enabling the heavy block body 8 to be transported from a low position to a high position or from a high position to a low position. The carrying mechanism 2 reciprocates within the circulation channel 1 via the circulation component. Specifically, the heavy block circulation section may include the circulation channel 1, the circulation component, and the carrying mechanism 2. The circulation channel 1 can be, for example, a channel structure commonly used in the field of gravity energy storage technology, such as a shaft structure, a staircase structure, or a mountain structure. The interior of the circulation channel 1 needs to have sufficient space and sufficient height difference to meet the technical requirements of gravity energy storage. The circulation component is used to drive the heavy block body 8, enabling the heavy block body 8 to be transported from a low position to a high position or from a high position to a low position. The carrying mechanism 2 cooperates with the circulation component and is used to carry the heavy block body 8. The carrying mechanism 2 can be a common carrier in the prior art, such as a car, a crane arm, or a carrying pallet, as long as it can meet the requirements of carrying the heavy block body 8. The weight block body 8 can be housed inside the bearing mechanism 2, hoisted to the lower part of the bearing mechanism 2, or placed on the upper part of the bearing mechanism 2. The specific connection structure between the weight block body 8 and the bearing mechanism 2 can be reasonably selected as needed. Since these are all common existing technologies and are well known to those skilled in the art, they will not be described in detail here. In this embodiment, the bearing mechanism 2 is a car structure.
[0031] like Figures 1 to 3As shown in the embodiment, the motor unit can be understood as a component that forms both energy storage and power supply in the gravity energy storage device based on a linear motor. Specifically, the motor unit includes a stator assembly and a mover assembly. The mover assembly is disposed on the side wall of the support mechanism 2 near the circulation channel 1, and the stator assembly is disposed on the side wall of the circulation channel 1. The stator assembly is fixedly disposed on the side wall of the circulation channel 1, while the mover assembly moves cyclically within the circulation channel 1 following the support mechanism 2. That is, when the weight block body 8 is disposed on the support mechanism 2, when the weight block body 8 is transported from a high position to a low position, the mover assembly is also transported from a high position to a low position, and vice versa. During the entire movement, since the stator assembly is fixed, while the mover assembly undergoes a relative positional change relative to the stator assembly, the change in relative position causes a change in magnetic flux, allowing the motor unit to be configured as a linear motor or a linear generator.
[0032] The operating principle of the gravity energy storage device based on a linear motor is as follows: The device has two modes: energy storage mode and power generation mode. In energy storage mode, the heavy block 8 is transported to the interior of the supporting mechanism 2 via the conveyor belt 7. At this time, the external power grid releases electrical energy, and the motor unit, acting as a linear motor, moves the circulation component through the cooperation of the stator and mover components, thereby causing the heavy block 8 at the bottom to rise, realizing the conversion of electrical energy into gravitational potential energy. In power generation mode, the heavy block 8 is transported to the interior of the supporting mechanism 2 via the conveyor belt 7. At this time, the supporting mechanism 2 moves the heavy block 8 from a high position to a low position. The motor unit, acting as a linear generator, outputs electrical energy to the power grid through equipment such as a distillation device, inverter, and transformer, realizing the conversion of gravitational potential energy into electrical energy.
[0033] Preferably, such as Figures 1 to 3 As shown, in this embodiment, the circulation component may include a rotating wheel 5 and a connecting member 6. The connecting member 6 surrounds the rotating wheel 5, and a bearing mechanism 2 is provided at each end of the connecting member 6. The rotating wheel 5 can be a common wheel structure in the prior art, and the circumferential direction of the rotating wheel 5 can cooperate with the connecting member 6, so that the connecting member 6 can surround the rotating wheel 5. The connecting member 6 can be, for example, a steel wire rope or a chain, which can surround the circumferential direction of the rotating wheel 5. Since a bearing mechanism 2 is provided at each end of the connecting member 6, when one bearing mechanism 2 descends, the other bearing mechanism 2 can rise, without the need for system output power to drive the unloaded bearing mechanism 2 to rise, thus avoiding energy waste caused by the unloaded operation of the bearing mechanism 2 in the gravity energy storage system.
[0034] Preferably, such as Figures 1 to 4As shown in the embodiment, each support mechanism 2 has a mover assembly on the side wall near the circulation channel 1, and each mover assembly corresponds to a stator assembly. In order to enable two support mechanisms 2 inside a circulation channel 1 to simultaneously function as the mover of a linear motor, a mover assembly is provided on the side wall near the circulation channel 1 of each support mechanism 2.
[0035] Preferably, such as Figures 1 to 4 As shown, in this embodiment, the stator assembly may include multiple stator bodies 4, which are respectively disposed on multiple interconnected inner wall surfaces of the circulation channel 1, and the multiple stator bodies 4 surround the mover assembly. In this embodiment, the circulation channel 1 is formed into an approximately cuboid structure, which includes four inner wall surfaces (four inner wall surfaces other than the top surface and the ground surface), such as... Figure 4 As shown, each support mechanism 2 is close to three of the inner wall surfaces, so one support mechanism 2 can correspond to three stator bodies 4. Each stator body 4 extends from the top to the bottom of the circulation channel 1.
[0036] Furthermore, the mover assembly can also include three corresponding mover bodies 3, each mover body 3 corresponding to one stator body 4. This allows for greater energy output when the relative positions of the mover bodies 3 and stator bodies 4 change.
[0037] Preferably, such as Figure 1 and Figure 2 As shown, in this embodiment, the gravity energy storage device based on a linear motor further includes a conveying unit, which includes a conveying channel and a weight block body 8. The weight block body 8 is transported to the interior of the bearing mechanism 2 via the conveying channel.
[0038] Furthermore, in an embodiment, the circulation channel 1 can be formed as a shaft structure, with the conveying channel located at the end of the shaft structure. Only the conveying section at the top of the shaft structure is shown in the figure. In actual use, to enable the heavy block body 8 to circulate back and forth between high and low points, conveying sections are provided at both ends of the shaft structure.
[0039] Preferably, such as Figure 1 and Figure 2 As shown, in this embodiment, the conveying channel is a conveyor belt 7. To ensure excellent transmission performance and facilitate the docking of the heavy block body 8 with the bearing mechanism 2, the conveying channel in this embodiment adopts the transmission form of a conveyor belt 7.
[0040] Preferably, in the embodiments, the stator body 4 and the mover body 3 can both be structures commonly used in linear motors in the prior art. For example, the mover body 3 is made of magnetic steel material, and the stator body 4 is made of silicon steel sheet wound with copper coil.
[0041] Preferably, such as Figures 1 to 4 As shown, in this embodiment, the gravity energy storage device based on a linear motor includes an energy storage mode and a power generation mode. The gravity energy storage device based on a linear motor can switch between the energy storage mode and the power generation mode, thereby enabling the motor unit to function as a linear motor or a linear generator.
[0042] Specifically, when the gravity energy storage device based on a linear motor is in energy storage mode, the motor unit acts as a linear motor, which drives the circulation component to move.
[0043] When the gravity energy storage device based on a linear motor is in power generation mode, the motor section acts as a linear generator, the stator assembly is connected to the external power grid, and the movement of the circulation assembly drives the displacement of the rotor assembly. The stator assembly can be connected to the external power grid via an external inverter and distillation device, etc.
[0044] This gravity energy storage device based on a linear motor can generate and store energy using the principle of a linear motor. A stator body 4 extending from top to bottom is installed on the inner wall of the circulation channel 1, and a mover body 3 is installed on the side of the supporting mechanism 2 facing the stator body 4. The stator body 4 and the mover body 3 constitute a linear motor. The stator body 4 can be connected to an external inverter and distillation device, etc. During the operation of the supporting mechanism 2, the change in the relative position of the stator body 4 and the mover body 3 causes a change in magnetic flux, thereby generating electricity and transmitting it to the grid. During operation, the grid connection of the linear motor output can be controlled according to the power level requirements of the grid, which can increase the output power of the gravity energy storage system and be used to regulate the fluctuation of the grid output power, improve power quality, and increase the flexibility of the control strategy for peak shaving and valley filling of the grid.
[0045] This gravity energy storage device based on a linear motor, through the cooperation of the motor section and the weight block circulation section, enables the motor section to function as a linear motor during energy storage and as a linear generator during power generation, achieving stable power output in the same channel. Since the entire device is used as a linear motor, it avoids the power fluctuations that occur during power generation or storage in the original gravity energy storage technology, resulting in high-quality output power and stable power generation during grid connection.
[0046] Finally, it should be noted that the above-described embodiments are merely specific implementations of this application, used to illustrate the technical solutions of this application, and not to limit them. The protection scope of this application is not limited thereto. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can still modify or easily conceive of changes to the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features, within the technical scope disclosed in this application. Such modifications, changes, or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be covered within the protection scope of this application. Therefore, the protection scope of this application should be determined by the protection scope of the claims.
Claims
1. A gravity energy storage device based on a linear motor, characterized in that, The gravity energy storage device based on a linear motor includes a motor section and a weight circulation section. The weight circulation section includes a circulation channel, a circulation assembly, and a support mechanism. The support mechanism reciprocates inside the circulation channel via the circulation assembly. The motor section includes a stator assembly and a mover assembly. The mover assembly is disposed on the side of the support mechanism near the side wall of the circulation channel, and the stator assembly is disposed on the side wall of the circulation channel.
2. The gravity energy storage device based on a linear motor according to claim 1, characterized in that, The circulation assembly includes a rotating wheel and a connecting member, the connecting member surrounding the rotating wheel, and a bearing mechanism is respectively provided at both ends of the connecting member.
3. The gravity energy storage device based on a linear motor according to claim 2, characterized in that, Each of the bearing mechanisms has a moving part assembly on the side wall near the circulation channel, and each moving part assembly corresponds to one stator assembly.
4. The gravity energy storage device based on a linear motor according to claim 2, characterized in that, The stator assembly includes multiple stator bodies, which are respectively disposed on multiple interconnected inner wall surfaces of the circulation channel, and the multiple stator bodies surround the mover assembly.
5. The gravity energy storage device based on a linear motor according to claim 1, characterized in that, The gravity energy storage device based on a linear motor also includes a conveying unit, which includes a conveying channel and a heavy block body. The heavy block body is transported to the interior of the bearing mechanism via the conveying channel.
6. The gravity energy storage device based on a linear motor according to claim 5, characterized in that, The circulation channel is formed as a vertical shaft structure, and the conveying channel is located at the end of the vertical shaft structure.
7. The gravity energy storage device based on a linear motor according to claim 5, characterized in that, The conveyor channel is a conveyor belt.
8. The gravity energy storage device based on a linear motor according to claim 1, characterized in that, The gravity energy storage device based on a linear motor includes an energy storage mode and a power generation mode, and the gravity energy storage device based on a linear motor can switch between the energy storage mode and the power generation mode.
9. The gravity energy storage device based on a linear motor according to claim 8, characterized in that, When the gravity energy storage device based on the linear motor is in energy storage mode, the motor unit acts as a linear motor, and the linear motor drives the circulation component to move.
10. The gravity energy storage device based on a linear motor according to claim 8, characterized in that, When the gravity energy storage device based on the linear motor is in power generation mode, the motor part acts as a linear generator, the stator assembly is connected to the external power grid, and the movement of the circulation assembly drives the displacement of the mover assembly.