CN113417817A - Solid gravity flow carrying equipment and energy storage system - Google Patents

Solid gravity flow carrying equipment and energy storage system Download PDF

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Publication number
CN113417817A
CN113417817A CN202110729624.7A CN202110729624A CN113417817A CN 113417817 A CN113417817 A CN 113417817A CN 202110729624 A CN202110729624 A CN 202110729624A CN 113417817 A CN113417817 A CN 113417817A
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altitude
energy storage
section
gravity
low
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CN202110729624.7A
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Chinese (zh)
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吴炎喜
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Individual
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Priority to CN202110729624.7A priority Critical patent/CN113417817A/en
Publication of CN113417817A publication Critical patent/CN113417817A/en
Priority to PCT/CN2022/077039 priority patent/WO2023273365A1/en
Priority to CN202280034604.0A priority patent/CN117280116A/en
Withdrawn legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03G—SPRING, WEIGHT, INERTIA OR LIKE MOTORS; MECHANICAL-POWER PRODUCING DEVICES OR MECHANISMS, NOT OTHERWISE PROVIDED FOR OR USING ENERGY SOURCES NOT OTHERWISE PROVIDED FOR
    • F03G3/00—Other motors, e.g. gravity or inertia motors
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/28—Arrangements for balancing of the load in a network by storage of energy
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K41/00—Propulsion systems in which a rigid body is moved along a path due to dynamo-electric interaction between the body and a magnetic field travelling along the path
    • H02K41/02—Linear motors; Sectional motors

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Current-Collector Devices For Electrically Propelled Vehicles (AREA)

Abstract

The application discloses a solid gravity flow carrying device and an energy storage system.A power tunnel is arranged on a gravity energy storage element moving track, the gravity energy storage element passes through the power tunnel, a bottom rotor, a top rotor and a side rotor are respectively and electromagnetically coupled with a bottom stator, a top stator and a side stator, and a plurality of gravity energy storage elements are continuously pushed to form solid gravity flow to be synchronously lifted so as to convert electric energy into power, change potential energy and store the power; and the gravity energy storage elements continuously push the solid gravity flow to descend, so that the gravitational potential energy is converted into electric energy to be fed back to the power grid.

Description

Solid gravity flow carrying equipment and energy storage system
Technical Field
The application relates to the field of gravity energy storage, in particular to a solid gravity flow carrying device and an energy storage system.
Background
The energy is the material basis of human survival and social development, and the guarantee of sufficient energy supply is the necessary condition for the happy life of people; if the solar energy is used as ultimate energy of human, the human does not worry about the exhaustion of fossil energy and does not worry about the deterioration of environment due to the use of the fossil energy.
Solar energy presents a practical hurdle. Due to the autorotation of the earth, the sun can be in daytime and the back can be in night; due to the revolution of the earth, the sunlight intensity in summer and winter is different; and the nature difference of the earth surface land and the ocean, and various factors such as terrain change cause various meteorology such as cloudy day, rainy day of steam evaporation, air convection, etc. The intermittent daytime and night season, the season difference between winter and summer season, and the cloudy day and rain with weather changes hinder the practicability of solar energy.
The space-time movement of the solar energy can be realized through the energy storage, so that the solar energy can be stably used at any time. However, the solar energy is the ultimate energy for human use, has huge numerical value, can be suitable for energy storage for balancing day-night difference, season difference and gas aberration, and needs to be supported by a super-large scale energy storage system; huge energy storage resource guarantees are required. The energy is a basic substance for human survival and social development, the economy of the energy is extremely sensitive, and low-cost energy storage is a necessary condition; due to the huge amount of energy storage required to balance diurnal, seasonal, and meteorological differences, the industries associated therewith and their daily operations must be environmentally friendly.
At present, various physical and chemical energy storage technologies exist, but the pumped storage is mainly used. By 2017, more than 96% of energy storage machines in the world are pumped and stored, and more than 99% of energy storage machines in China are pumped and stored. The main purpose of the existing energy storage project is to optimize peak clipping and valley filling of power grid operation, and the scale is limited; therefore, the construction of water-pumping energy-storage power stations is very short of available geographic resources, and the site selection of the power stations is more and more difficult. Although chemical energy storage projects are increased in recent years, if a chemical battery is used to meet the ultra-large-scale energy storage required by energy transformation, the method has no practicability in resource guarantee, economy and environmental tolerance. Therefore, the existing physical and chemical energy storage technologies cannot meet the ultra-large scale requirement for energy transformation.
Disclosure of Invention
The embodiment of the application provides a solid gravity flow carrying device, wherein, a solid gravity flow carrying device comprises a plurality of gravity energy storage elements, a gravity energy storage element moving track, a linear motor stator set and a linear motor rotor set, the gravity energy storage element moving track is used for guiding the gravity energy storage element to move up and down, the gravity energy storage element moving track is provided with a low altitude section and a high altitude section opposite to the low altitude section, and an inclined section between the low altitude section and the high altitude section, the inclined section is provided with a power tunnel, the power tunnel is provided with a tunnel bottom, a tunnel top opposite to the tunnel bottom and two tunnel sides, the linear motor stator set comprises a bottom stator fixed at the tunnel bottom, a top stator fixed at the tunnel top and a side stator fixed at the tunnel sides, the linear motor-driven sub-group comprises a bottom rotor, a top rotor and a side rotor which are fixed on each gravity energy storage element, the bottom rotor, the top rotor and the side rotor are respectively fixed at the bottom, the top and the side of the gravity energy storage elements, when a plurality of gravity energy storage elements are continuously pushed and pushed by a low-altitude section to enter the power tunnel, the bottom rotor, the top rotor and the side rotor are respectively electromagnetically coupled with the bottom stator, the top stator and the side stator to convert electric energy into driving power to drive the gravity energy storage elements to continuously push and move to the high-altitude section, when a plurality of gravity energy storage elements are continuously pushed and pushed by the high-altitude section to enter the power tunnel, the gravity energy storage elements are continuously pushed and passed through the power tunnel under the action of gravity, and the bottom rotor, the top rotor and the side rotor are respectively connected with the bottom stator, The top stator and the side stator are electromagnetically coupled to convert mechanical kinetic energy into electric energy, and the gravity energy storage elements continue to continuously push and move to the low-altitude section to be lifted to the high-altitude section power tunnel again next time.
The embodiment of the application provides an energy storage system, wherein, energy storage system includes foretell solid gravity flow delivery equipment, energy storage system still includes low height above sea level storage yard and high height above sea level storage yard, low height above sea level section runs through low height above sea level storage yard, high height above sea level section runs through high height above sea level storage yard, works as during the energy storage system energy storage, low height above sea level storage yard to low height above sea level section is carried gravity energy storage component, high height above sea level storage yard is followed high height above sea level section is received and is stored gravity energy storage component, works as when solid gravity energy storage system releases energy, high height above sea level storage yard to high height above sea level section carries gravity energy storage component, low height above sea level storage yard follows low height above sea level section is received and is stored gravity energy storage component.
The embodiment of the application provides a solid gravity flow delivery equipment and energy storage system is equipped with power tunnel through gravity energy storage component removal track, linear electric motor stator group is including being fixed in the bottom stator of tunnel bottom, being fixed in the top stator at tunnel top and being fixed in the lateral part stator of tunnel lateral part, linear electric motor active cell group is including being fixed in each bottom active cell, top active cell and the lateral part active cell of gravity energy storage component, bottom active cell, top active cell and lateral part active cell are fixed in respectively bottom, top and the lateral part of gravity energy storage component, bottom active cell, top active cell and lateral part active cell respectively with bottom stator, top stator and lateral part stator electromagnetic coupling, it is a plurality of the continuous top of gravity energy storage component pushes away forms solid gravity flow and rises in step to convert the electric energy into power, thereby change potential energy, storing; and the gravity energy storage elements continuously push the solid gravity flow to descend, so that the gravitational potential energy is converted into electric energy to be fed back to the power grid.
The invention aims to realize complete energy transformation, and innovates a super-large-scale energy storage technology which has enough resource guarantee, excellent economy and environmental friendliness so as to realize that solar energy becomes ultimate energy of human reality.
The invention utilizes the terrain conditions of large altitude height difference between high altitude plateaus, high mountains and peripheral low altitude basins and low lands to realize energy storage in the form of changing solid gravitational potential energy; the geographic resources of the landform are extremely rich, so that the resource guarantee problem of ultra-large-scale energy storage based on the complete energy transformation condition is solved.
The invention creates the technical concept (technical method) of solid gravity flow, fluidizes a solid heavy object, and a plurality of gravity energy storage elements are pushed and connected in series in the front and back direction in the whole process on the moving track of the gravity energy storage elements, and are similar to water flow under the action of power or gravity.
The gravity energy storage element moving track is provided with a power tunnel section and a non-power track section, wherein the power tunnel section generates all power required by the rising of the solid gravity flow on the solid gravity energy storage element moving track or bears the thrust of all gravity of the falling of the solid gravity flow on the solid gravity energy storage element moving track. The high-thrust linear motor of the power tunnel is used as power, the length of the power tunnel is shortened to the greatest extent, and meanwhile, the roadbed processing of the power tunnel section is strengthened, so that the power tunnel section can bear the thrust exerted by the gravity of the whole-course solid gravity energy storage element of the lifting channel.
Drawings
In order to more clearly illustrate the technical solution of the application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the application, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic illustration of a solid gravity flow carrier apparatus provided by an embodiment of the present application;
FIG. 2 is a schematic cross-sectional view II-II of the solid gravity flow carrier device of FIG. 1;
FIG. 3 is a (top) schematic view of a gravity energy storage element of the solid gravity flow carrying device of FIG. 1;
FIG. 4 is a schematic cross-sectional view A-A of the solid gravity flow carrying device of FIG. 3;
FIG. 5 is a simplified schematic illustration of the solid gravity flow carrier apparatus of FIG. 1;
FIG. 6 is a schematic view of a low altitude converter connection of the solid gravity flow carrier of FIG. 1;
FIG. 7 is a schematic diagram of a high-altitude current transformer connection of the solid gravity flow carrying device of FIG. 1;
FIG. 8 is a schematic cross-sectional view of a braking section of a solid gravity flow carrier provided by an embodiment of the present application;
FIG. 9 is a side view of a braking member provided by an embodiment of the present application;
fig. 10 is a side view of a gravity energy storage element provided by an embodiment of the present application;
FIG. 11 is a schematic diagram of an energy storage system provided by an embodiment of the present application;
fig. 12 is a schematic view of a low-altitude yard of the energy storage system of fig. 11.
Detailed Description
The technical solutions in the embodiments will be clearly and completely described below with reference to the drawings in the embodiments.
Referring to fig. 1, fig. 2 and fig. 3, the present application provides a solid gravity flow carrying apparatus 1000, where the solid gravity flow carrying apparatus 1000 includes a plurality of gravity energy storage devices 900, a gravity energy storage device moving track 100, a linear motor stator set and a linear motor rotor set, and the gravity energy storage device moving track 100 is used to guide the gravity energy storage devices 900 to move up and down. The gravity energy storage element moving rail 100 has a low-altitude section 110 and a high-altitude section 120 opposite to the low-altitude section 110, and an inclined section 130 between the low-altitude section 110 and the high-altitude section 120. The inclined section 130 is provided with a power tunnel 131, the power tunnel 131 having a tunnel bottom 1311, a tunnel top 1312 opposite to the tunnel bottom 1311 and two tunnel sides 1313, and the linear motor stator set includes a bottom stator 210 fixed to the tunnel bottom 1311, a top stator 220 fixed to the tunnel top 1312, and side stators 230 fixed to the tunnel sides 1313. The linear motor subset comprises a bottom mover 310, a top mover 320 and a side mover 330 fixed to each of the gravity energy storage elements 900. The bottom mover 310, the top mover 320 and the side mover 330 are respectively fixed to the bottom, the top and the side of the gravity energy storage element 900, when the gravity energy storage elements 900 are continuously pushed into the power tunnel 131 by the low-altitude section 110, the bottom mover 310, the top mover 320 and the side mover 330 are respectively electromagnetically coupled to the bottom stator 210, the top stator 220 and the side stator 230 to convert electric energy into driving power to drive the gravity energy storage elements 900 to continuously push and move to the high-altitude section 120, when the gravity energy storage elements 900 are continuously pushed into the power tunnel 131 by the high-altitude section 120, the gravity energy storage elements 900 are continuously pushed through the power tunnel 131 under the action of gravity, and the bottom mover 310, the top mover 320 and the side mover 330 are respectively connected to the bottom stator 210, the top and the side stator 210, The top stator 220 and the side stator 230 are electromagnetically coupled to convert the mechanical kinetic energy into the electrical energy, and the plurality of gravity energy storage elements 900 continue to continuously push and move to the low-altitude section 110 to be lifted to the power tunnel 131 of the high-altitude section 120 again.
A power tunnel 131 is arranged on the gravity energy storage element moving track 100, the gravity energy storage element 900 passes through the power tunnel 131, the bottom rotor 310, the top rotor 320 and the side rotor 330 are respectively electromagnetically coupled with the bottom stator 210, the top stator 220 and the side stator 230, and a plurality of gravity energy storage elements 900 are continuously pushed to form solid gravity flow to be synchronously lifted so as to convert electric energy into power, thereby changing potential energy and storing the power; the gravity energy storage elements 900 are continuously pushed to form a solid gravity flow to descend, and the gravitational potential energy is converted into electric energy to be fed back to the power grid.
In this embodiment, the gravity energy storage element moving track 100 includes two parallel rails 101. The two parallel rails 101 are respectively in rolling fit with the rail wheels of the gravity energy storage element 900 to guide the gravity energy storage element 900 to move. The rail 101 is fixed to a mountain having a large height difference. The low-altitude section 110 is located at a low-altitude position of the mountain, and the high-altitude section 120 is located at a high-altitude position of the mountain. The inclined section 130 is located on the slope of a mountain. The altitude difference between the high altitude section 120 and the low altitude section 110 is 800m to 3000m or more. For example, the low-altitude section 110 has an altitude of 1200m, and the high-altitude section 120 has an altitude of 4200 m. The slope of the inclined section 130 preferably ranges from 20 ° to 60 °, for example, the slope of the inclined section 130 is 30 °. For example, the length 6000m of the inclined section 130.
In this embodiment, the power tunnel 131 passes through a mountain body, so as to drive the gravity energy storage element 900 to move smoothly. The rail 101 of the inclined section 130 passes through the power tunnel 131 and can movably guide the gravity energy storage element 900. The power tunnel 131 is provided with a tunnel inner wall, and the bottom stator 210 is fixed between two rails 101 in the tunnel, that is, the portion between the two rails 101 in the tunnel forms the tunnel bottom 1311. The top stator 220 is fixed to the top of the tunnel inner wall, i.e., the top of the tunnel inner wall constitutes the tunnel top 1312. The side stators 230 are fixed to sides of the tunnel inner wall having two opposite sides, that is, two opposite tunnel sides 1313 are provided in the power tunnel 131, and the two side stators 230 are fixed to the two tunnel sides 1313, respectively. The power tunnel 131 corresponds to a portion of the inclined section 130, i.e. the length of the power tunnel 131 is much shorter than the length of the inclined section 130. The length of the power tunnel 131 is a part of the length of the inclined section 130, for example, the total length of the inclined section 130 is 6000m, the length of the power tunnel 131 is 1000m to 3000m, the length of the power tunnel 131 is determined according to the technical level of the high thrust linear motor, and the design goal is to make the power tunnel 131 as short as possible, but is limited by the technical level of the linear motor adopted at each stage. The portion of the inclined section 130 outside of the power tunnel 131 constitutes a non-powered track section that occupies a larger area of the inclined section 130.
The length of the power tunnel 131 is far less than that of the inclined section 130, and the inclined section 130 is correspondingly covered on the part where the inclined section 130 is connected with the low-altitude section 110, so that the linear motor rotor and the linear motor stator are coupled on a mountain slope to drive the energy storage element to ascend, the electric energy is converted into the potential energy of the solid gravity energy storage element 900, and the gravity energy storage element 900 is driven to slide downwards in a matched manner with the power tunnel 131, so that the gravitational potential energy is converted into the electric energy.
It can be understood that when the bottom stator 210, the top stator 220, and the side stator 230 in the power tunnel 131 are respectively matched with the bottom mover 310, the top mover 320, and the side mover 330 of the gravity energy storage element 900, the linear motor drives the gravity energy storage element 900 to ascend from the low-altitude section 110 to the high-altitude section 120, so that the linear motor consumes electric energy to do work, and the gravity energy storage element 900 ascends to the high-altitude section 120, so as to store the gravity potential energy. When the gravity energy storage element 900 descends from a high altitude to the low altitude section 110, the gravity energy storage element 900 drives the bottom mover 310, the top mover 320 and the side mover 330 to descend under the action of gravity, and the bottom mover 310, the top mover 320 and the side mover 330 are respectively matched with the bottom stator 210, the top stator 220 and the side stator 230 in the power tunnel 131, so that electromagnetic excitation is realized, and the gravitational potential energy is converted into electric energy.
Referring to fig. 2, 3 and 4, in the present embodiment, the bottom stator 210, the top stator 220 and the side stator 230 are all stators of a high thrust density and high thrust linear motor. The bottom stator 210 is installed between the two rails 101 along the length direction of the power tunnel 131, and the top stator 220 and the side stator 230 are installed on the inner wall of the tunnel along the length direction of the power tunnel 131 and inside the power tunnel 131.
In this embodiment, the gravity energy storage elements 900 may be arranged in the power tunnel 131 continuously, that is, during energy storage or release, the length of the movers of the gravity energy storage elements 900 is approximately equal to the length of the stator in the power tunnel 131, so that the lengths of the movers are coupled to the full length of the stator in the power tunnel 131, and the full length of the stator of the long linear motor is in a loaded state, thereby obtaining high power factor and high efficiency of the linear motor. A plurality of gravity energy storage elements 900 continuously moving are always arranged on the power tunnel 131, so that the gravity energy storage elements 900 continuously move along the gravity energy storage element moving track 100 all the time, and thus solid gravity flow is formed.
It can be understood that the solid gravity flow carrying device 1000 provided by the present application can be applied to a solid gravity energy storage system with a large altitude head, and has the following beneficial effects:
1. fully utilizes natural conditions to form gravity energy storage resources in the form of large altitude difference
1.1 the gravity energy storage element 900 naturally has potential energy due to the force of the earth's gravity. The larger the relative altitude value of the gravity energy storage element 900 is, the larger the absolute potential energy value thereof is; the gravity energy storage element 900 stays at a certain height, and potential energy exists at a certain height, so that energy storage is realized;
because the solid is the most basic material in the nature, sand, soil, stones and the like are all basic materials of the earth, the method is very abundant, the materials are convenient to obtain, the engineering forming treatment is easy, the shape cannot be changed along with the time, and the quality cannot disappear along with the time; the use of solid material as the gravity energy storage element 900 is inexpensive to manufacture.
1.2 the potential energy density of the gravity energy storage element 900 depends on the absolute value of the altitude difference of the position where the gravity energy storage element 900 is located, i.e. the altitude difference determines the potential energy density of the gravity energy storage element 900. That is, the selection of the large altitude difference is a preferable condition for increasing the potential energy storage density of the gravity energy storage element 900.
Since plateaus and mountains are the basic forms of the earth, the plateaus and the mountains are ubiquitous in different degrees in all continents in the world; the Asian plateau and the mountain are rich in geographical resources, the edge length of the Qinghai-Tibet plateau and the Pamier plateau in China reaches 6000-7000 kilometers, the altitude difference between the Qinghai-Tibet plateau and the Pamier plateau and the plain and the basin at the edge of the plateau can reach 2000-3000 m, the terrain condition is superior, the station building and site selection of the solid gravity energy storage power station with the large altitude difference are facilitated, the quantity of the selectable geographical resources is very rich (the actual engineering demand is less than 500 kilometers according to the maximum requirement), and the ultra-large scale energy storage required by energy transformation can be supported sufficiently), the average altitude difference between the Qinghai-Tibet plateau, the Pamier plateau and the plain and the basin at the periphery can reach more than 3000m, and therefore the solid gravity energy storage resources are very rich.
2. Innovative engineering means
The invention creates a method for forming solid gravity flow, which makes the solid weight fluidized, makes the solid gravity flow similar to liquid flow (water flow), under the action of power or gravity, the solid gravity flow is controlled to continuously flow (move) at high altitude and low altitude without interval, according to different time zones for storing or releasing energy, the flow direction is controlled to convert the power into power, the solid weight is raised to high altitude, the potential energy of gravity is changed, and the energy storage is realized; or the solid weight is lowered to a low position, the gravity of the solid is converted into electric energy, and the electric energy is released to the power grid. The principle is similar to that of pumped storage power stations based on gravity flow of liquid. However, the solid gravity energy storage based on the solid gravity flow at high altitude difference has abundant geographical resources of plateau, mountain and peripheral edge, and has sufficient resource guarantee; the altitude difference of the terrain is large, the mass density of the solid matter is large, the property is stable, and the available quantity is almost not limited, so that the solid gravity energy storage can be suitable for super-large-scale energy storage, can bear the energy storage scale requirement required by complete energy transformation, and can provide a key energy storage technical support for the energy transformation revolution.
1. The solid gravity energy storage element 900 with pushing bosses at the front and back, lateral rotors 330 at the left and right sides, a top rotor 320 at the top, a bottom rotor 310 at the bottom and rolling wheels is designed, so that the gravity energy storage element 900 can move continuously, the gravity energy storage element 900 can bear the thrust of a linear motor in all directions in the power tunnel 131 conveniently, and the driving efficiency is increased;
2. selecting a terrain with large altitude difference, and building a lifting channel of the solid gravity energy storage element 900 between high altitude and low altitude;
3. the solid gravity energy storage elements 900 are connected in series in the whole process on the lifting channel in a front-back connection way, and when the solid gravity energy storage elements 900 are pushed and linked under the action of power or gravity, the solid gravity energy storage elements 900 are fluidized to form solid gravity flow;
4. a power tunnel 131 (called as a power tunnel) using a linear motor as power is arranged at the low-altitude section 110 of the lifting channel of the solid gravity energy storage element 900, and the power tunnel 131 absorbs the electric power of the power grid to apply lifting power to the solid gravity energy storage element 900 or absorbs the gravity of the solid gravity energy storage element 900 and converts the gravity into the electric power which is fed back to the power grid;
5. arranging traveling crane arrays in high and low altitude storage yards for collecting the solid gravity energy storage elements 900 from each stacking position to the rail or dispersing the solid gravity energy storage elements 900 from the rail to each stacking position in place;
6. under the control of the system control unit, the collecting and dispersing speeds of the solid gravity energy storage elements 900 in the high-altitude and low-altitude storage yards are coordinated and synchronized with the flow rate of the solid gravity flow, so that the solid gravity flow keeps unidirectional continuous movement in the energy storage or release functional time zone, and the system obtains the highest operation efficiency.
The altitude difference between the plateau, the mountain and the surrounding plain and basin is utilized to realize the movement and the stay of the gravity energy storage element 900 between the high altitude and the low altitude, so that the potential energy of the gravity energy storage element is changed and stored to achieve the purpose of energy storage. Therefore, the engineering technology suitable for realizing lifting and transferring of a large number of gravity energy storage elements 900 in unit time between large altitude differences is the innovative key of the application.
The invention divides the lifting channel of the solid gravity energy storage element 900 into a power tunnel section and a non-power track section for generating power; the power tunnel section is the power tunnel 131, and the power tunnel section generates all the power required by the rising of the solid gravity flow on the rising and falling channel of the solid gravity energy storage element 900 or bears all the thrust of the falling of the solid gravity flow on the rising and falling channel of the solid gravity energy storage element 900. The power tunnel section takes the high-thrust induction linear motor as power, the length of a main power section of the power tunnel is shortened to the maximum extent (the length of the high-thrust linear motor is shortened), the roadbed processing of the power tunnel is strengthened, the power tunnel section can bear the thrust exerted by the gravity of the solid gravity energy storage element 900 in the whole lifting channel, and the thrust exerted by the gravity of the solid gravity energy storage element 900 in the whole lifting channel is borne by the power tunnel section, so that the gravity of the solid gravity energy storage element 900 in the non-power track section only exerts partial pressure on the roadbed, and does not exert the thrust in the low altitude direction; therefore, the roadbed treatment of the non-power track section is greatly simplified, the manufacturing cost is reduced, and the system investment is reduced to the maximum extent. It is foreseeable that: the length of the power tunnel (the power tunnel 131) is only one section of the length of the lifting channel of the solid gravity energy storage element 900, although the investment density is concentrated to the section, the concentration ratio is not proportional, and a large amount of investment can be saved compared with a whole power structure.
Further, with continuing reference to fig. 2, fig. 3 and fig. 4, the tunnel side 1313 is provided with a first limit rail 1314 and a second limit rail 1315, the first limit rail 1314 and the second limit rail 1315 extend along the length direction of the power tunnel 131, the first limit rail 1314 and the second limit rail 1315 are respectively close to the tunnel top 1312 and the tunnel bottom 1311, the side of the gravity energy storage element 900 is provided with a first side limit wheel 901 and a second side limit wheel 902, and after the gravity energy storage element 900 enters the power tunnel 131, the first side limit wheel 901 and the second side limit wheel 902 are respectively in limit fit with the end face of the first limit rail 1314 and the end face limited by the second limit rail 1315.
In this embodiment, the first limit rail 1314 and the second limit rail 1315 are protruded from the inner wall of the tunnel. The side stators 230 are disposed between the first and second curb rails 1314, 1315 on the same side. The first and second curb rails 1314, 1315 are curb rails. The first limit rail 1314 has a first limit end surface far away from the inner wall of the tunnel, and the second limit rail 1315 has a second limit end surface far away from the inner wall of the tunnel. The first limiting end face is in rolling fit with the first side limiting wheel 901, and the second limiting end face is in rolling fit with the second side limiting wheel 902, so that a gap between the side stator 230 and the side rotor 330 is limited to be kept within a certain range, stable electromagnetic coupling between the side stator 230 and the side rotor 330 is ensured, and driving efficiency is further ensured.
In this embodiment, the first side limiting wheel 901 and the second side limiting wheel 902 both at least partially protrude from the side of the gravity energy storage element 900. The rotating shaft of the first side limiting wheel 901 is parallel to the first limiting end face, and the rotating shaft of the second side limiting wheel 902 is parallel to the second limiting end face. The outer peripheral surface of the first side limiting wheel 901 is matched with the first limiting end surface, and the outer peripheral surface of the second side limiting wheel 902 is matched with the second limiting end surface. The side mover 330 is located between the first side limiting wheel 901 and the second side limiting wheel 902 on the same side.
Specifically, the gravity energy storage element 900 is provided with a box 903, the box 903 is provided with a filling cavity, and a solid material is filled in the filling cavity. The rail wheels are arranged at the bottom of the box 903. The bottom mover 310 is disposed at the bottom of the case 903 and located between the two rows of the track wheels 904. The top of the case 903 is provided with two opposite stacking bosses 909, a fixing groove is formed between the two stacking bosses 909, and the top mover 320 is located in the fixing groove. The two stacking bosses 909 are adjacent to two opposite sidewalls of the casing 903. The first side limiting wheel 901 is disposed on the stacking boss 909, and partially protrudes relative to the side wall of the case 903. The second side limiting wheel 902 is disposed on a side wall of the case 903 and is adjacent to the bottom of the case 903. The side mover 330 is fixed to the sidewall of the case 903, and is located between the first side limiting wheel 901 and the second side limiting wheel 902 on the same side.
Further, referring to fig. 5, a low-altitude arc segment 140 is disposed between the inclined segment 130 and the low-altitude segment 110, and a high-altitude arc segment 150 is disposed between the inclined segment 130 and the high-altitude segment 120.
In this embodiment, the low-altitude arc-shaped section 140 connects the inclined section 130 and the low-altitude section 110, so that the gravity energy storage element 900 can smoothly enter the inclined section 130 from the low-altitude section 110. The high-altitude curved section 150 connects the inclined section 130 and the high-altitude section 120 so that the gravity energy storage element 900 can smoothly enter the inclined section 130 from the high-altitude section 120. The power tunnel 131 is disposed at a portion of the inclined section 130 close to the low-altitude section 110, so that the plurality of gravity energy storage elements 900 enter the inclined section 130 from the low-altitude arc section 140 and then can rapidly enter the power tunnel 131, and the power tunnel 131 obtains the pushing and lifting power, so that the plurality of gravity energy storage elements 900 continuously push and lift to the high-altitude section 120 after passing through the power tunnel 131, thereby storing energy.
It can be understood that obtaining high energy storage conversion efficiency is a key index of energy storage, and in relation to energy storage economy, the solid gravity flow device provided by the application adopts a linear motor as a power device of the lifting carrying channel of the solid gravity energy storage element 900, and improving the energy conversion efficiency is an important feature of the application.
The linear motor is applied to the field of rail transit, and the comprehensive performance advantage of the linear motor is reflected. However, linear motors have lower energy conversion efficiency than rotary motors, and are a drawback that must be overcome for energy storage applications.
The inner diameter of the stator of the rotating motor is coupled with the outer diameter of the rotor in a full area mode, and all tangential thrust generated by a traveling wave magnetic field of the stator effectively acts on the rotor; the air gap between the stator and the rotor has small value, the air gap magnetic resistance loss is small, and the efficiency is high.
However, in the existing linear motor applications such as magnetic levitation trains, electromagnetic ejectors and the like, the stator of the linear motor is coupled with the rotor, the length of the generated electromagnetic thrust is only a small local section of the stator energization length, and the rest of the stator energization length is in an unloaded energization state, so that the power factor is low and the efficiency is reduced.
Referring to fig. 1 and 2, the bottom stator 210 of the power tunnel 131 of the solid gravity flow carrying apparatus 1000 provided by the present application is fully coupled to the bottom movers 310 of the gravity energy storage elements 900 along the entire length, and keeps the moving-out and moving-in of the bottom movers 310 balanced in real time, so that the coupling degree is constant. The top stator 220 is coupled to the top movers 320 of the gravity energy storage elements 900 over the full length and the entire length, and keeps the moving-out and moving-in real-time balance of the top movers 320, so that the coupling degree is constant, and the side stator 230 is coupled to the side movers 330 of the gravity energy storage elements 900 over the full length and the entire length, and keeps the moving-out and moving-in real-time balance of the side movers 330, so that the coupling degree is constant. The full-length section between the stator and the rotor in the power tunnel 131 generates effective thrust, thereby greatly improving the energy conversion efficiency of the linear motor as energy storage application.
The stator is installed on the inner wall of the power tunnel 131 and the rail 101, the stator is high in stability and strength, the bottom rotor 310, the top rotor 320 and the side rotor 330 are limited to the first side limiting wheel 901 and the second side limiting wheel 902, and the first limiting rail 1314 and the second limiting rail 1315 respectively, so that air gaps among the bottom rotor 310, the top rotor 320 and the side rotor 330, the bottom stator 210, the top stator 220 and the side stator 230 are convenient to small design values, and efficiency is further improved.
The power tunnel 131 is a power core of the system, and when the system stores energy, converts the electric power of the power grid into power for pushing the gravity energy storage element 900 to move the rail 100 to ascend along the gravity energy storage element; when the system releases energy, the power tunnel 131 converts the mechanical thrust of the solid gravity flow formed by the gravity energy storage elements 900 on the gravity energy storage element moving track 100 into electric power to feed back to the power grid.
The power tunnel 131 is the most main part of the system, the thrust density of the driving force section is improved, the length of the power tunnel 131 is shortened, the underground basic engineering cost of the gravity energy storage element moving track 100 can be reduced, the cost of the power tunnel 131 is reduced, the operation and maintenance cost is reduced, and other practical and potential advantages are achieved, the solid gravity flow carrying equipment 1000 improves the thrust density of the unit length of the power tunnel 131, the length of the power tunnel 131 is shortened, and the following mode is adopted to achieve the purpose:
1. linear motor stators are respectively arranged on the inner wall of the tunnel and the bottom, the top and the double side parts in the tunnel, and linear motor rotors formed by induction plates are respectively arranged on the bottom, the top and the double side parts of the solid gravity energy storage element, so that the electromagnetic coupling area of the power tunnel in unit length is increased, and the tangential thrust of the unit length is improved.
In one embodiment, the elevation of the low-altitude section 110 is 1200m, the elevation of the high-altitude section 120 is 4200m, the elevation difference between the low-altitude section 110 and the high-altitude section 120 is 3000m, the slope of the incline section 130 is 30 °, and the slope of the incline section 130 is 6000 m.
The cross section of the gravity energy storage element 900 is configured for road transportation, for example, the width of the gravity energy storage element 900 is 3.2m, the height of the gravity energy storage element 900 is 3.2m, and the sectional area of the gravity energy storage element 900 is 10.24m2Cross section 10m of the gravimetric energy storage element 9002。
The gravity energy storage element 900 comprises a box body 903, wherein the box body 903 is a box-type steel shell, the box body 903 is filled with waste rocks and sandy soil, and the box body 903 is filled with waste rocks and sandy soilAnd an average mass density of the inner filler of 2500kg/m3The weight per unit length was 25000 kg/m.
The total load G2.5 of the slope length of the inclined section 130 is 25000(kg) × 6000(m) ═ 150000000kg,
the total thrust F2.5 of the gravity flow of the solid formed by the multi-force energy storage element 900 of the inclined section 130 is 150000000(kg) × 9.8 × sin30 ═ 735(MN)
The tangential thrust of the coupling surface unit area of the bottom stator 210, the bottom rotor 310, the top stator 220, the top rotor 320, the side stator 230 and the side rotor 330 is 0.05MN/m2The total length of the periphery of the gravity energy storage element 900 is 7.2m, and the tangential thrust of the power tunnel per unit length is 0.36 MN.
The length L of the power tunnel 131 is 735(MN) ÷ 0.36MN ═ 2041.67 m.
Considering that the acceleration and thrust margin is multiplied by the length L of the power tunnel section 131 by the coefficient of 1.2 to be 2500m, the length of the power tunnel is about 40% of the total length 6000m of the gravity energy storage element moving track 100.
And setting the solid gravity flow velocity formed by the plurality of energy storage elements to be 4 (m/s).
The total power P4 of the linear motor composed of the bottom stator 210 and the bottom mover 310, the side stator 230 and the side mover 330, and the top stator 220 and the top mover 320 is 735(MN) × 4(m/s) ═ 2940000 (kw).
The unit stores 294 ten thousand kilowatt hours of energy per hour (theory), 1600 hours per year and 470400 ten thousand kilowatt hours of energy storage capacity.
Further, the gravity energy storage element moving track 100 is provided with two side-by-side rails 101, two rows of track wheels 904 are arranged at the bottom of the gravity energy storage element 900, the two rows of track wheels 904 are respectively matched with the two rails 101, and the bottom mover 310 is located between the two rows of track wheels 904. When the gravity energy storage element 900 passes through the power tunnel 131, the bottom mover 310 and the bottom stator 210 are electromagnetically coupled, so that the gravity energy storage element 900 is driven to move along the two rows of the rails 101.
Further, referring to fig. 5, fig. 6 and fig. 7, the low-altitude section 110 has a low-altitude distribution section 111, a low-altitude cache transportation section 112 and a low-altitude delivery section 113 connected in sequence, the low-altitude distribution section 111 is used for distributed transportation of the gravity energy storage device 900, the low-altitude cache transportation section 112 transfers and transports the gravity energy storage device 900 between the low-altitude distribution section 111 and the low-altitude delivery section 113, and the low-altitude delivery section 113 is used for pushing the gravity energy storage device 900 to the inclined section 130 during energy storage.
In this embodiment, the low-altitude distribution section 111 distributes the gravity energy storage devices 900 transported to the low-altitude section 110 and places them on the track, so as to store the gravity energy storage devices 900 in a stacked manner, or places the gravity energy storage devices 900 stored in a stacked manner on the track. The low-altitude cache transportation section 112 transports the gravity energy storage devices 900 distributed in the low-altitude distribution section 111 to the low-altitude delivery section 113, or transports the gravity energy storage devices 900 distributed in the low-altitude delivery section 113 to the low-altitude distribution section 111. The low-altitude delivery segment 113 receives the descending gravity energy storage device 900 from the low-altitude arc segment 140 and delivers the descending gravity energy storage device 900 to the low-altitude cache delivery segment 112, or pushes the gravity energy storage device 900 delivered by the low-altitude cache delivery segment 112 to the low-altitude arc segment 140.
Further, the linear motor stator set includes a low-altitude motor stator 290 fixed to the low-altitude distribution section 111, the low-altitude cache transportation section 112, and the low-altitude delivery section 113, and the low-altitude motor stator 290 is electromagnetically coupled to the bottom mover 310 to drive the gravity energy storage element 900 to move in the low-altitude distribution section 111, the low-altitude cache transportation section 112, and the low-altitude delivery section 113.
In this embodiment, the low-altitude motor stator 290 is fixed between two rows of the rails 101, so that the low-altitude motor stator 290 is electromagnetically coupled to the bottom mover 310 fixed to the bottom of the gravity energy storage element 900. The low-altitude motor stator 290 of the low-altitude distribution section 111 is electrically connected to different converters in the low-altitude distribution section 111, the low-altitude cache transportation section 112, and the low-altitude pick-up section 113, respectively. Specifically, the low-altitude motor stator 290 of the low-altitude distribution section 111 is electrically connected to N +1 distribution section distinguishing converters 2902, the low-altitude motor stator 290 of the low-altitude cache transportation section 112 is electrically connected to the cache section converter 2903, and the low-altitude motor stator 290 of the low-altitude delivery section 113 is electrically connected to the delivery section converter 2904, so that the gravity energy storage element 900 has different moving speeds in the low-altitude distribution section 111, the low-altitude cache transportation section 112, and the low-altitude delivery section 113, respectively, so as to facilitate transportation of the gravity energy storage element 900 in the low-altitude section 110.
Further, the high-altitude section 120 has a high-altitude distribution section 121, a high-altitude cache transportation section 122, and a high-altitude delivery section 123, which are connected in sequence, where the high-altitude distribution section 121 is used for distributed transportation of the gravity energy storage elements 900, the high-altitude cache transportation section 122 transfers and transports the gravity energy storage elements 900 between the high-altitude distribution section 121 and the high-altitude delivery section 123, and the high-altitude delivery section 123 is used for pushing the gravity energy storage elements 900 to the inclined section 130 when releasing energy.
In this embodiment, the high-altitude distribution section 121 distributes the gravity energy storage devices 900 transported to the high-altitude section 120 on the track to be stored in a stacked manner in the gravity energy storage devices 900, or distributes the gravity energy storage devices 900 stored in a stacked manner on the track. The high-altitude cache transportation section 122 transports the gravity energy storage devices 900 distributed in the high-altitude distribution section 121 to the high-altitude delivery section 123, or transports the gravity energy storage devices 900 distributed in the high-altitude delivery section 123 to the high-altitude distribution section 121. The high altitude pick-up section 123 receives the lifted gravity energy storage device 900 from the high altitude arc-shaped section 150 and delivers the lifted gravity energy storage device 900 to the high altitude cache delivery section 122, or pushes the lifted gravity energy storage device 900 delivered from the high altitude cache delivery section 122 to the high altitude arc-shaped section 150.
Further, the linear motor stator set includes a high-altitude motor stator 280 fixed to the high-altitude distribution section 121, the high-altitude cache transportation section 122, and the high-altitude pick-up section 123, and the high-altitude motor stator 280 is battery-coupled to the bottom mover 310 to drive the gravity energy storage element 900 to move in the high-altitude distribution section 121, the high-altitude cache transportation section 122, and the high-altitude pick-up section 123.
In this embodiment, the high-altitude motor stator 280 is fixed between two rows of the rails 101, so that the high-altitude motor stator 280 is electromagnetically coupled to the bottom mover 310 fixed to the bottom of the gravity energy storage element 900. The high-altitude motor stator 280 of the high-altitude distribution section 121 is electrically connected to different converters in the high-altitude distribution section 121, the high-altitude cache transportation section 122 and the high-altitude pick-up section 123. Specifically, the high-altitude motor stator 280 of the high-altitude distribution section 121 is electrically connected to N +1 distribution section difference converters 2802, the high-altitude motor stator 280 of the high-altitude cache transportation section 122 is electrically connected to the cache section converter 2803, and the high-altitude motor stator 280 of the high-altitude delivery section 123 is electrically connected to the delivery section converter 2804, so that the gravity energy storage element 900 has different moving rates at the high-altitude distribution section 121, the high-altitude cache transportation section 122, and the high-altitude delivery section 123, respectively, so as to transport the gravity energy storage element 900 at the high-altitude section 120.
Further, the solid gravity flow carrier device 1000 further comprises a low-altitude braking section 160, wherein the low-altitude braking section 160 is connected to an end of the low-altitude section 110 far away from the power tunnel 131, and is used for braking the gravity energy storage element 900 entering the low-altitude section 110.
In this embodiment, the low-altitude braking section 160 brakes the gravity energy storage device 900 that completes the conversion of the gravitational potential energy into the electric energy, so that the gravity energy storage device 900 is safely stopped, and the inertial kinetic energy of the gravity energy storage device 900 is prevented from causing collision damage to other objects. The low-altitude braking section 160 brakes the gravity energy storage element 900 located in front, so that the gravity energy storage element 900 forming a solid gravity flow is braked for the whole continuity, and the plurality of gravity energy storage elements 900 are conveniently stacked in a distributed manner at a low altitude.
Specifically, referring to fig. 8 and 9, the low-altitude braking section 160 is provided with a braking tunnel 180 and a plurality of braking elements 181 arranged in the braking tunnel 180, the braking elements 181 sequentially and continuously abut against the braking tunnel 180, at least one pair of braking pads 182 is arranged outside the braking elements 181, a braking rail 183 matched with the at least one pair of braking pads 182 is arranged in the braking tunnel 180, and when the gravity energy storage element 900 abuts against the braking elements 181 and the braking rail 183 is clamped by the at least one pair of braking pads 182, the braking elements 181 brake the gravity energy storage element 900.
In the present embodiment, the brake tunnel 180 at low altitude is butted against the low altitude distribution section 111. A plurality of the brake braking elements 181 which continuously abut against each other are movable in the braking tunnel 180 so as to absorb the kinetic energy of the gravity energy storage element 900. Specifically, the brake element 181 has a plurality of pairs of brake pads 182 on both the left and right sidewalls. A plurality of pairs of the brake pads 182 are arranged on the sidewall of the brake element 181 along two upper and lower straight lines at intervals. The brake rails 183 are arranged on the inner side wall of the brake tunnel 180 along an upper straight line and a lower straight line. The brake rails 183 arranged along the upper straight line are matched with a plurality of pairs of brake pads 182 arranged along the upper straight line. The brake rails 183 arranged along the lower straight line are matched with a plurality of pairs of brake pads 182 arranged along the lower straight line. Each pair of the brake pads 182 includes two pads that open and close with each other. When the brake pads are closed, the brake rail 183 is clamped, so that the brake element 181 is prevented from moving by the friction force between the brake pads 182 and the brake rail 183. The plurality of brake braking elements 181 are abutted, so that the matching length of the plurality of brake braking elements 181 and the brake rail 183 is increased, and the braking force is increased, so that the plurality of gravity energy storage elements 900 forming the solid gravity flow are effectively braked.
In this embodiment, the linear motor stator set further includes a track motor stator 270 fixed between the two braking section rails 185, the bottom of the braking element 181 is provided with two rows of braking element rail wheels 184 engaged with the two braking section rails 185, the linear motor sub-set further includes a reset motor mover 370 fixed at the bottom of the braking element 181 and located between the two rows of braking element rail wheels 184, and the reset motor mover 370 is coupled with the track motor stator 270 to drive the braking element 181 to move along the braking section rails 185 for resetting. When the two brake pads are mutually opened and are separated from the brake rail 183, the reset motor rotor 370 and the reset motor stator are coupled to drive the brake braking element 181 to move in the brake tunnel, so that the reset of the brake braking element 181 can be realized, and the brake braking element 181 can brake the gravity energy storage element 900 next time.
Furthermore, a brake bracket 186 is disposed on an outer side of the brake element 181, at least one driving member 1861 is disposed on the brake bracket 186, and each driving member 1861 correspondingly drives the brake pad 182 to clamp the brake rail 183.
In this embodiment, the brake element 181 has two brake brackets 186 disposed on the left and right sidewalls. The upper brake bracket 186 is adjacent the top of the brake actuating member 181 and the lower brake bracket 186 is adjacent the bottom of the brake actuating member 181. The upper brake bracket 186 is movably connected to the upper row of linearly arranged pairs of brake pads 182, and the lower brake bracket 186 is movably connected to the lower row of linearly arranged pairs of brake pads 182. The driving member 1861 applies a driving force to open or close the brake pad 182. The upper row of pairs of brake pads 182 and the lower row of pairs of brake pads 182 are arranged in a staggered manner to evenly distribute the braking resistance of the braking elements 181, so that the braking elements effectively brake the gravity energy storage elements 900 forming the solid gravity flow. Two opposite sides of the brake braking element 181 are provided with two brake brackets 186, the two brake brackets 186 are respectively close to the top and the bottom of the brake braking element 181, and each brake bracket 186 is provided with a plurality of driving members and a plurality of pairs of brake pads 182.
Further, referring to fig. 10, the front end and the rear end of the gravity energy storage element 900 are respectively provided with a pushing boss 905 and a pushing concave platform 906, the pushing boss 905 at the front part of the box 903 of the gravity energy storage element 900 abuts against the pushing concave platform 906 at the rear part of the box 903 of the previous gravity energy storage element 900, the pushing concave platform 906 at the rear part of the box 903 of the gravity energy storage element 900 abuts against the pushing boss 905 at the front part of the box 903 of the next gravity energy storage element 900, the gravity energy storage elements 900 from the low altitude section 110 to the high altitude end are connected in series in a whole course, and are linked in a whole course under the action of power or gravity to form a solid gravity flow.
In this embodiment, the gravity energy storage element 900 includes a box 903 and four rail wheels 904 (the rail wheels 904 may be multiple pairs or multiple groups) rotatably connected to the bottom of the box 903, and the box 903 is used for accommodating solid gravity objects. The side mover 330 is fixed to the left and right sides outside the case 903. The pushing boss 905 and the pushing boss 906 are respectively arranged at the front section and the rear section outside the box 903. The rollers are arranged at the outer bottom of the box 903, and the top mover 320 is arranged at the outer top of the box 903. The box 903 is a rectangular housing. The box 903 is filled with a solid gravity which may be the most basic material in nature, for example, sand, soil, stone, etc. The four track wheels 904 are respectively in rolling engagement with two rails 101 of the gravity energy storage element moving track 100 two by two, so that the gravity energy storage element 900 can be in flow operation in the form of a solid gravity flow. The gravity energy storage element 900 may be transferred and stored. The box 903 and the track wheel 904 are made of steel materials, so that the gravity energy storage element 900 is stable in structure, durable, low in manufacturing cost and high in mass density.
In this embodiment, the pushing boss 905 and the pushing boss 906 are fixed to the front end and the rear end of the casing 903, respectively. The end of the pushing boss 905 away from the box 903 is provided with an arc protrusion, and the end of the pushing boss 906 is provided with an arc depression. When the pushing boss 905 and the pushing boss 906 of two adjacent gravity energy storage elements 900 abut against each other, the arc-shaped protrusion and the arc-shaped recess are matched, so that the two adjacent gravity energy storage elements 900 are effectively connected to form a solid gravity flow, and after the solid gravity flow completes the storage of the gravitational potential energy or the release of the gravitational potential energy, the gravity energy storage elements 900 are quickly separated from the arc-shaped recess through the arc-shaped protrusion, so that the mutual quick separation is realized, and the gravity energy storage elements 900 are conveniently and quickly transferred and stored. Of course, in other embodiments, an arc-shaped recess may be provided at the end of the pushing boss 905, and an arc-shaped protrusion may be provided at the end of the pushing boss 906.
Further, a wheel vacant area 907 is disposed on the top of the box 903, and the wheel vacant area 907 is used for accommodating a part of the rail wheel 904 when the gravity energy storage elements 900 are stacked.
In this embodiment, four wheel clearance areas 907 are provided on the top of the casing 903, and the depth of the wheel clearance areas 907 is slightly greater than the height of the rail wheels 904 extending out of the casing 903. When the gravity energy storage devices 900 are stacked, the portion of the rail wheel 904 of one gravity energy storage device 900 protruding out of the box 903 is just accommodated in the wheel vacancy 907 of the other gravity energy storage device 900, and the bottom of the upper gravity energy storage device 900 abuts against the top of the lower gravity energy storage device, so that the stacked gravity energy storage devices 900 are stacked stably. The wheel clearance 907 is provided in the stacking boss, so that the gravity energy storage element 900 can be stacked effectively.
Further, referring to fig. 11 and 12, an embodiment of the present application further provides an energy storage system 2000, the energy storage system 2000 comprises the solid gravity flow carrier 1000, the energy storage system 2000 further comprises a low altitude yard 2100 and a high altitude yard 2200, the low-altitude section 110 extends throughout the low-altitude yard 2100, the high-altitude section 120 extends throughout the high-altitude yard 2200, when the energy storage system 2000 stores energy, the low-altitude yard 2100 transports the gravity energy storage element 900 to the low-altitude section 110, the high-altitude yard 2200 receives and stores the gravity energy storage elements 900 from the high-altitude segment 120, when the solid gravity energy storage system 2000 is de-energized, the high-altitude yard 2200 delivers the gravity energy storage elements 900 to the high-altitude section 120, the low-altitude yard 2100 receives and stores the gravity energy storage element 900 from the low-altitude segment 110.
In this embodiment, the gravity energy storage elements 900 on the whole lifting track are in rolling fit with the gravity energy storage element moving track 100, that is, the gravity energy storage elements 900 can be continuously lifted along the gravity energy storage element moving track 100 by the electromagnetic thrust generated by the bottom stator 210, the top stator 220, and the side stator 230 in the power tunnel 131 through the cooperation of the bottom mover 310, the top mover 320, and the side mover 330 of the gravity energy storage element 900, and the gravity energy storage elements 900 can also be continuously lifted and lowered along the gravity energy storage element moving track 100 under the action of gravity. After the gravity energy storage element 900 enters the power tunnel 131 of the inclined section 130, the gravity energy storage element 900 is continuously pushed, or the gravity energy storage element 900 is continuously descended and linked. The plurality of gravity energy storage elements 900 are continuously arranged and moved in the inclined section 130, so that the plurality of gravity energy storage elements 900 form a solid gravity flow to flow on the inclined section 130. When the solid gravity flow rises along the inclined section 130, the redundant electric energy of the power grid is converted into the gravitational potential energy of the gravity energy storage elements 900, and the gravitational potential energy of the gravity energy storage elements 900 is stored. When the solid gravity flow descends and flows in the inclined section 130, the gravitational potential energy of the gravity energy storage elements 900 is converted into electric energy to be fed back to the power grid.
In this embodiment, the low-altitude yard 2100 is configured to descend to the gravity energy storage device 900 at the low altitude when the system releases energy, and to ascend the gravity energy storage device 900 at the high altitude when the system stores energy next time. The high-altitude storage yard 2200 is configured to store the gravity energy storage device 900 that rises to the high altitude when the system stores energy, and to lower the gravity energy storage device 900 of the high-altitude storage yard 2200 to the low altitude when the system releases energy next time.
Further, the low-altitude yard 2100 is provided with a low-altitude yard area in butt joint with the low-altitude section 110, the low-altitude yard area is used for stacking and storing the gravity energy storage elements 900 when the system releases energy, and the high-altitude yard 2200 is provided with a high-altitude yard area in butt joint with the high-altitude section 120, the high-altitude yard area is used for stacking and storing the gravity energy storage elements 900 when the system stores energy.
In this embodiment, the low-altitude stacking area receives the gravity energy storage elements 900 from the low-altitude distribution section 111, and stacks and stores the gravity energy storage elements 900 in a plurality of rows and columns, so as to save the floor space. When the energy storage system 2000 needs to release gravitational potential energy and feed back electric energy to the power grid, the gravitational energy storage element 900 at high altitude flows to the low altitude collecting and distributing section 111 through the gravitational energy storage element moving track 100 in the form of solid gravitational flow, and is transferred and stacked to the low altitude stacking area in the low altitude collecting and distributing section 111. When the energy storage system 2000 needs to convert the electric energy of the power grid into gravitational potential energy for storage, the gravitational energy storage elements 900 stacked and stored in the low-altitude stacking area are transferred to the low-altitude distribution section 111, and are continuously transported to a high altitude place in a solid gravitational flow manner, so that the gravitational potential energy storage is realized. The high-altitude stacking area receives the gravity energy storage elements 900 from the high-altitude collecting and distributing section 121, and stacks and stores the gravity energy storage elements 900 in a multi-row and multi-column manner, so that the occupied area is saved. When the energy storage system 2000 needs to release gravitational potential energy and feed back electric energy to the power grid, the gravitational energy storage element 900 in the high-altitude stacking area is transferred to the high-altitude distribution section 121, and flows to a low altitude place through the gravitational energy storage element moving track 100 in the form of solid gravitational flow in the high-altitude distribution section 121.
Further, the low-altitude stacking area and the high-altitude stacking area are provided with a transverse track beam 2300, a cart 2310 matched with the transverse track beam 2300, and a left stacking cart, a right stacking cart and a loading and unloading cart matched with the cart 2310, the left stacking cart and the right stacking cart run on the left side and the right side of the low-altitude section 110 or the high-altitude section 120, the loading and unloading cart runs above the low-altitude section 110 or the high-altitude section 120 to unload the gravity energy storage elements 900 on the low-altitude section 110 or the high-altitude section 120 to the left side and the right side of the low-altitude section 110 or the high-altitude section 120, and then the left stacking cart and the right cart stack the gravity energy storage elements 900 to the stacking areas on the two sides of the low-altitude section 110 or the high-altitude section 120 respectively.
In this embodiment, the transverse track beam 2300 can movably guide the left pallet truck so that the left pallet truck can move in the left stacking area to shift or place the gravity energy storage element 900 in the left stacking area. The transverse track beam 2300 can move and guide the right stacking travelling crane, so that the right stacking travelling crane can move in the stacking area on the side again to shift or place the gravity energy storage element 900 in the stacking area on the side again, and therefore the left stacking area and the right stacking area are arranged in the low-altitude stacking area and the high-altitude stacking area to stack and place the gravity energy storage element 900, or the gravity energy storage element 900 is fast shifted to the gravity energy storage element moving track 100 from the left stacking area and the right stacking area.
In this embodiment, the loading and unloading traveling crane can move left and right, so that the gravity energy storage elements 900 can be transferred to the left and right sides of the track of the low-altitude distribution section 111 or the track of the high-altitude distribution section 121 after being lifted. The loading and unloading travelling crane is provided with a lifting hook, and the gravity energy storage element 900 can be lifted by the lifting hook so as to transfer, stack and store the gravity energy storage element 900.
Further, the energy storage system 2000 further includes a system main controller 2400, a grid access device 2500 and a grid, the grid access device 2500 is electrically connected to the linear motor stator set, and the grid access device 2500 is also electrically connected to the grid, and is configured to absorb electric energy of the grid through the linear motor stator set and the linear motor rotor set, or release electric energy to the grid.
In this embodiment, the system main controller 2400 controls the grid access device 2500 to input the electric energy of the grid to the linear motor stator group and the linear motor rotor group to generate power, so that the gravity energy storage element 900 in the whole course of the inclined section 130 is transferred and transported from a low altitude to a high altitude in a solid gravity flow manner, and thus the electric energy of the grid is converted into kinetic energy to change the potential energy of the solid gravity energy storage element 900, and the kinetic energy is stored. The system main controller 2400 further controls the electronic stator group and the linear motor group to push the gravity energy storage element 900 at the high altitude to the inclined section 130 of the gravity energy storage element moving track 100, so that the gravity energy storage element 900 in the whole course of the inclined section 130 is transported from the high altitude to the low altitude in the form of solid gravity flow, thereby converting gravitational potential energy into electric energy, and controlling the power grid access device 2500 to receive the electric energy generated by coupling the main power stator and the main power rotor and feed the electric energy back to the power grid. The energy storage system 2000 further includes a first main power converter 2809, a second main power converter 2808, a third main power converter 2807, a fourth main power converter 2806 electrically connected to the system main controller 2400, wherein the first main power converter 2809, the second main power converter 2808, the third main power converter 2807 and the fourth main power converter 2806 are electrically connected to the bottom stator 210, the top stator 220 and the two side stators 230, respectively, so as to control power of the power tunnel.
Further, the energy storage system 2000 further includes a low-altitude yard control module 2600 and a high-altitude yard control module 2700, the low-altitude yard control module 2600 is configured to control the gravity energy storage device 900 of the low-altitude yard 2100 to be separated from or loaded onto the low-altitude section 110, the high-altitude yard control module 2700 is configured to control the gravity energy storage device 900 of the high-altitude yard 2200 to be separated from or loaded onto the high-altitude section 120, and the main controller is electrically connected to the low-altitude yard control module 2600 and the high-altitude yard control module 2700. The low-altitude yard control module 2600 controls the operation of the gravity energy storage element 900 of the low-altitude yard 2100. The high-altitude yard control module 2700 controls the gravity energy storage element 900 of the high-altitude yard 2200 to move so as to automate energy storage or release of the energy storage system 2000.
The foregoing is a preferred embodiment of the application, and it should be noted that those skilled in the art can make various improvements and modifications without departing from the application principle, and these improvements and modifications are also considered as the protection scope of the application.

Claims (19)

1. The solid gravity flow carrying equipment is characterized by comprising a plurality of gravity energy storage elements, a gravity energy storage element moving track, a linear motor stator set and a linear motor rotor set, wherein the gravity energy storage element moving track is used for guiding the gravity energy storage elements in a lifting and moving mode, the gravity energy storage element moving track is provided with a low altitude section, a high altitude section opposite to the low altitude section and an inclined section located between the low altitude section and the high altitude section, the inclined section is provided with a power tunnel, the power tunnel is provided with a tunnel bottom, a tunnel top opposite to the tunnel bottom and two tunnel side portions, the linear motor stator set comprises a bottom stator fixed at the tunnel bottom, a top stator fixed at the tunnel top and a side stator fixed at the tunnel side portions, and the linear motor rotor set comprises a bottom rotor fixed at each gravity energy storage element, The bottom rotor, the top rotor and the side rotor are respectively fixed at the bottom, the top and the side of the gravity energy storage element, when a plurality of gravity energy storage elements are continuously pushed and enter the power tunnel by a low-altitude section, the bottom rotor, the top rotor and the side rotor are respectively electromagnetically coupled with the bottom stator, the top stator and the side stator so as to convert electric energy into driving power to drive the gravity energy storage elements to continuously push and move to the high-altitude section, when a plurality of gravity energy storage elements are continuously pushed and enter the power tunnel by a high-altitude section, the gravity energy storage elements are continuously pushed and pass through the power tunnel under the action of gravity, and the bottom rotor, the top rotor and the side rotor are respectively electromagnetically coupled with the bottom stator, the top stator and the side stator, the gravity energy storage elements continuously push and move to the low-altitude section to be lifted to the high-altitude section power tunnel again next time.
2. The solid gravity flow carrying apparatus according to claim 1, wherein the tunnel side portion is provided with a first limit rail and a second limit rail, the first limit rail and the second limit rail extend along the length direction of the power tunnel, the first limit rail and the second limit rail are respectively close to the tunnel top and the tunnel bottom, the side portion of the gravity energy storage element is provided with a first side limit wheel and a second side limit wheel, and after the gravity energy storage element enters the power tunnel, the first side limit wheel and the second side limit wheel are respectively in limit fit with the end surface of the first limit rail and the end surface of the second limit rail.
3. The solids gravity flow carrier device of claim 1, wherein the power tunnel is disposed in a portion of the inclined section proximate to the low-altitude section.
4. The solid gravity flow carrying apparatus according to claim 1, wherein the gravity energy storage element moving track is provided with two side by side rails, the bottom of the gravity energy storage element is provided with two rows of track wheels, the track wheels are respectively engaged with the rails, and the bottom mover is located between the two rows of track wheels.
5. The solid gravity flow carrier device of claim 1, wherein the low elevation section has a low elevation distribution section for distributed transport of the gravity energy storage elements, a low elevation buffer transport section for transferring transport of the gravity energy storage elements between the low elevation distribution section and the low elevation receiving section, and a low elevation receiving section for pushing the gravity energy storage elements to the inclined section when storing energy, connected in series.
6. The solid gravity flow carrying apparatus of claim 5, wherein the linear motor stator set comprises a low-altitude motor stator fixed to the low-altitude distribution section, low-altitude buffer transport section, and low-altitude pick-up section, the low-altitude motor stator being electromagnetically coupled to the bottom mover to drive the gravity energy storage element to move in the low-altitude distribution section, low-altitude buffer transport section, and low-altitude pick-up section.
7. The solid gravity flow carrying apparatus according to claim 1, wherein the high altitude section has a high altitude hub section for hub transportation of the gravity energy storage elements, a high altitude buffer transport section for transfer transport of the gravity energy storage elements between the high altitude hub section and the high altitude pick-up section, and a high altitude pick-up section for pushing the gravity energy storage elements to the inclined section upon release of energy, connected in series.
8. The solid gravity flow carrier device of claim 7, wherein the linear motor stator assembly comprises a high altitude motor stator fixed to the high altitude hub section, high altitude buffer transport section and high altitude pick-up section, the high altitude motor stator being electromagnetically coupled to the bottom mover to drive the gravity energy storage element to move in the high altitude hub section, high altitude buffer transport section and high altitude pick-up section.
9. The solid gravity flow carrier device of claim 1, further comprising a low altitude braking section connected to an end of the low altitude section remote from the power tunnel for braking a gravity energy storage element of the low altitude section upon a system command outage, or a fault outage.
10. The solid gravity flow carrying device according to claim 9, wherein the low altitude brake section comprises a brake tunnel and a plurality of brake elements disposed in the brake tunnel, the plurality of brake elements sequentially and continuously abut against the brake tunnel, at least one pair of brake pads is disposed outside the brake elements, a brake rail matched with the at least one pair of brake pads is disposed in the brake tunnel, and when the gravity energy storage element abuts against the brake elements and the at least one pair of brake pads clamps the brake rail, the brake elements brake the gravity energy storage element.
11. The solid gravity flow carrying apparatus of claim 10, wherein the linear motor stator assembly further comprises a rail motor stator fixed between the two brake rails, the bottom of the brake element is provided with two rows of brake element rail wheels, the linear motor stator assembly further comprises a reset motor mover fixed to the bottom of the brake element and located between the two rows of brake element rail wheels, the reset motor mover is coupled with the rail motor stator to drive the brake element to reset.
12. The solid gravity flow carrying apparatus according to claim 10, wherein a brake bracket is provided on an outer side of the brake actuating member, and at least one driving member is provided on the brake bracket, each driving member driving the brake pad to clamp the brake rail.
13. A solid gravity flow carrier device according to claim 12, wherein two said brake brackets are provided on opposite sides of said brake actuating member, said two said brake brackets being located adjacent a top and a bottom of said brake actuating member, respectively, each said brake bracket having a plurality of said actuating members and a plurality of pairs of said brake pads provided thereon.
14. The solid gravity flow carrying equipment according to claim 1, wherein the front end and the rear end of the gravity energy storage element are respectively provided with a pushing boss and a pushing concave platform, the pushing boss at the front part of the gravity energy storage element box body abuts against the pushing concave platform at the rear part of the previous gravity energy storage element box body, the pushing concave platform at the rear part of the gravity energy storage element box body abuts against the pushing boss at the front part of the next gravity energy storage element box body, the gravity energy storage elements in the whole range from the low altitude section to the high altitude section abut against and are connected in series, and the whole range is linked under the action of power or gravity to form the solid gravity flow.
15. An energy storage system, comprising the solid gravity flow carrier apparatus of any one of claims 1 to 14, further comprising a low altitude storage yard and a high altitude storage yard, wherein the low altitude section extends through the low altitude storage yard, wherein the high altitude section extends through the high altitude storage yard, wherein when the energy storage system stores energy, the low altitude storage yard conveys the gravity energy storage elements to the low altitude section, wherein the high altitude storage yard receives and stores the gravity energy storage elements from the high altitude section, wherein when the solid gravity energy storage system releases energy, the high altitude storage yard conveys the gravity energy storage elements to the high altitude section, and wherein the low altitude storage yard receives and stores the gravity energy storage elements from the low altitude section.
16. The energy storage system of claim 15, wherein the low-altitude yard is provided with a low-altitude palletizing area interfacing with the low-altitude section, the low-altitude palletizing area being configured to store the gravity energy storage elements in a stack upon release of energy from the system, and the high-altitude yard is provided with a high-altitude palletizing area interfacing with the high-altitude section, the high-altitude palletizing area being configured to store the gravity energy storage elements in a stack upon storage of energy from the system.
17. The energy storage system of claim 16, wherein the low-altitude palletization zone and the high-altitude palletization zone are each provided with a travelling transverse track beam, a left palletization travelling crane and a right palletization travelling crane which are matched with the travelling transverse track beam, and a loading and unloading travelling crane, the left stacking travelling crane and the right stacking travelling crane run on the left side and the right side of the low altitude section or the high altitude section, the loading and unloading traveling crane installation position is lower than a transverse track beam in the low altitude section or the high altitude section by a plurality of meters, the stacking device runs below the left stacking travelling crane and the right stacking travelling crane and is used for unloading the gravity energy storage elements on the low-altitude section or the high-altitude section to the left side and the right side of the low-altitude section or the high-altitude section, and then the left stacking travelling crane and the right stacking travelling crane respectively stack the gravity energy storage elements to stacking areas on two sides of the low-altitude section or the high-altitude section.
18. The energy storage system of claim 17, wherein the low-altitude yard and the high-altitude yard are each provided with a plurality of rows of travelling crane arrays, each row of the travelling crane arrays is provided with a left palletizing travelling crane and a right palletizing travelling crane, and the loading and unloading travelling crane is arranged between the left palletizing travelling crane and the right palletizing travelling crane and above the low-altitude section or the high-altitude section.
19. The energy storage system of claim 15, further comprising a system main controller, a grid access device and a grid, wherein the grid access device is electrically connected to the linear motor stator assembly, and the grid access device is further electrically connected to the grid for absorbing electric energy from the grid through the linear motor stator assembly and the linear motor rotor assembly or releasing electric energy to the grid.
CN202110729624.7A 2021-06-29 2021-06-29 Solid gravity flow carrying equipment and energy storage system Withdrawn CN113417817A (en)

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CN202110729624.7A CN113417817A (en) 2021-06-29 2021-06-29 Solid gravity flow carrying equipment and energy storage system
PCT/CN2022/077039 WO2023273365A1 (en) 2021-06-29 2022-02-21 Solid gravity flow carrying apparatus and energy storage system
CN202280034604.0A CN117280116A (en) 2021-06-29 2022-02-21 Solid gravity flow carrying equipment and energy storage system

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023273365A1 (en) * 2021-06-29 2023-01-05 吴炎喜 Solid gravity flow carrying apparatus and energy storage system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023273365A1 (en) * 2021-06-29 2023-01-05 吴炎喜 Solid gravity flow carrying apparatus and energy storage system

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Application publication date: 20210921