CN117280116A - Solid gravity flow carrying equipment and energy storage system - Google Patents
Solid gravity flow carrying equipment and energy storage system Download PDFInfo
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- CN117280116A CN117280116A CN202280034604.0A CN202280034604A CN117280116A CN 117280116 A CN117280116 A CN 117280116A CN 202280034604 A CN202280034604 A CN 202280034604A CN 117280116 A CN117280116 A CN 117280116A
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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
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- 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
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- 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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/16—Mechanical energy storage, e.g. flywheels or pressurised fluids
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Abstract
A solid gravity flow carrying device (1000) is provided with a power down channel (131) through a gravity energy storage element moving track (100), a gravity energy storage element (900) passes through the power tunnel (131), a bottom rotor (310), a top rotor (320) and a side rotor (330) are respectively electromagnetically coupled with a bottom stator (210), a top stator (220) and a side stator (230), and a plurality of gravity energy storage elements (900) are continuously pushed to form solid gravity flow to synchronously rise so as to convert electric energy into power, thereby changing potential energy and storing the potential energy; the gravity energy storage elements (900) are continuously pushed to form solid gravity flow down, gravitational potential energy is converted into electric energy, and the electric energy is fed back to the power grid. Thereby realizing environmentally friendly low-cost energy storage. In addition, the invention also relates to an energy storage system of the solid gravity flow carrying device.
Description
The application relates to the field of gravity energy storage, in particular to solid gravity flow carrying equipment and an energy storage system.
The energy is the material basis for human survival and social development, and ensuring sufficient energy supply is a necessary condition for people to live happily; the solar energy is forever, inexhaustible, and if the solar energy is made to be the ultimate energy source of human beings, the human beings do not need to worry about the exhaustion of fossil energy, and anxiety caused by the deterioration of environment due to the use of the fossil energy.
Solar energy has a practical hurdle. Due to the autorotation of the earth, there are daytime when facing the sun and night when facing the back and yin; due to the revolution of the earth, there is a difference in the summer and winter sunshine intensity; and the earth surface land is different from the ocean in nature, and various factors such as topography change cause various weather such as vapor evaporation, overcast days of air convection, rainy. Day and night intermittence, winter and summer season difference, weather change cloudy days and rainy days, which obstruct the practicability of solar energy.
The space-time movement of solar energy can be realized by energy storage, so that the solar energy can be stably used at any time. However, solar energy is taken as an ultimate energy source for human use, the solar energy 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; a huge energy storage resource guarantee is required. The energy source is a basic substance for human survival and social development, the economy of the energy source is extremely sensitive, and low-cost energy storage is a necessary condition; because of the huge amount of energy storage required to balance day-night difference, season difference and gas aberration, the industries related to the energy storage and the daily operation of the energy storage must be friendly to the environment.
There are many physical and chemical energy storage technologies, but pumped storage is the main technology. By 2017, more than 96% of energy storage machines in the world are pumped storage, and more than 99% of energy storage machines in China are pumped storage. The main purpose of the existing energy storage project is to optimize peak clipping and valley filling of the power grid operation, and the scale is limited; in this way, the construction of water pumping energy storage power stations for providing geographical resources is very short, and the site selection of the power stations is more and more difficult. Although the number of chemical energy storage projects has increased in recent years, the use of chemical batteries to store energy in an ultra-large scale, which is required for energy conversion, has not been practical in terms of resource conservation, economy, and environmental acceptance. 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 solid gravity flow carrying equipment, wherein the solid gravity flow carrying equipment comprises a plurality of gravity energy storage elements, a gravity energy storage element moving track, a linear motor stator group and a linear motor rotor group, wherein the gravity energy storage element moving track is used for guiding the lifting movement of the gravity energy storage elements, 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 positioned 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 group 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 rotor group comprises a bottom rotor fixed at each gravity energy storage element, a top rotor and a side rotor, 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, the plurality of gravity energy storage elements are continuously driven by the power stator and the top rotor when the low-altitude section is continuously driven by the power energy storage elements to the tunnel bottom, the top rotor is continuously driven by the power stator and the power stator, and the top rotor continuously through the power stator and the top rotor continuously driving the power stator and the power stator when the power stator are continuously driven by the power stator and the power stator respectively at the top and the top rotor continuously, the top rotor and the side rotor are respectively and electromagnetically coupled with the bottom stator, the top stator and the side stator to convert mechanical kinetic energy into electric energy, and the gravity energy storage elements continuously push and move to the low-altitude section for being lifted to the high-altitude section power tunnel again next time.
The embodiment of the application provides an energy storage system, wherein, the energy storage system includes foretell solid gravity flow carrier equipment, the energy storage system still includes low altitude yard and high altitude yard, low altitude section runs through the low altitude yard, high altitude section runs through the high altitude yard, when the energy storage system energy storage, low altitude yard to low altitude section carries gravity energy storage element, high altitude yard is from high altitude section receives and stores gravity energy storage element, when solid gravity energy storage system releases the energy, high altitude yard to high altitude section carries gravity energy storage element, low altitude yard is from low altitude section receives and stores gravity energy storage element.
According to the solid gravity flow carrying device and the energy storage system, a power tunnel is arranged through a gravity energy storage element moving track, the linear motor stator group comprises a bottom stator fixed at the bottom of the tunnel, a top stator fixed at the top of the tunnel and a side stator fixed at the side part of the tunnel, the linear motor rotor group comprises a bottom rotor, a top rotor and a side 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, 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, and a plurality of gravity energy storage elements are continuously pushed to form solid gravity flow synchronous lifting so as to convert electric energy into power, thereby changing potential energy and storing; and the gravity energy storage elements are continuously pushed to form solid gravity flow down, so that gravitational potential energy is converted into electric energy and fed back to the power grid.
The invention aims to realize complete energy transformation, and innovate 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 the ultimate energy source for human reality.
The invention uses the topography condition of large altitude difference between the high altitude plateau, the high mountain and the surrounding low altitude basin, and realizes energy storage in the form of changing solid gravity potential energy; the geographic resources of the terrain are very rich, so that the resource guarantee problem of ultra-large-scale energy storage under the condition of complete energy transformation is solved.
The invention creates the technical concept (technical method) of solid gravity flow, so that solid weights are fluidized, a plurality of gravity energy storage elements are pushed in series before and after the whole process on a gravity energy storage element moving track, the gravity energy storage elements are similar to water flow under the action of power or gravity, the solid gravity flow can continuously and unidirectionally move between the elevations of thousands of meters in different functional time zones for energy storage or energy release, the system operation efficiency is greatly improved, and a single-machine high-capacity and ultra-large-capacity energy storage system is easy to realize.
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 ascending of the gravity flow of the solid on the solid gravity energy storage element moving track or bears the thrust of the descending of the gravity flow of the solid 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, meanwhile, the roadbed treatment of the power tunnel section is enhanced, so that the roadbed treatment of the non-power track section is simplified, the manufacturing cost of the roadbed is reduced, and the system investment is reduced to the greatest extent.
In order to more clearly illustrate the technical solutions of the application, the drawings that are required to be used in the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the application and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic illustration of a solid gravity flow carrying device provided in an embodiment of the present application;
FIG. 2 is a schematic cross-sectional view of II-II of the solid gravity flow carrying 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 of A-A of the solid gravity flow carrying device of FIG. 3;
FIG. 5 is a simplified schematic diagram of the solid gravity flow carrying device of FIG. 1;
FIG. 6 is a schematic diagram of a low altitude converter connection of the solid gravity flow carrying device of FIG. 1;
FIG. 7 is a schematic diagram of a high altitude converter 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 carrying device provided in an embodiment of the present application;
FIG. 9 is a side view of a brake element 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 elevation yard of the energy storage system of fig. 11.
The technical solutions in the application embodiments will be clearly and completely described below with reference to the drawings in the application embodiments.
Referring to fig. 1, 2 and 3, the present application provides a solid gravity flow carrying device 1000, where the solid gravity flow carrying device 1000 includes a plurality of gravity energy storage elements 900, a gravity energy storage element moving rail 100, a linear motor stator set and a linear motor sub-set, and the gravity energy storage element moving rail 100 is used for guiding the lifting movement of the gravity energy storage elements 900. The gravity energy storage element moving rail 100 has a low altitude section 110 and a high altitude section 120 opposite 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 has a tunnel bottom 1311, a tunnel top 1312 opposite 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 a side stator 230 fixed to the tunnel sides 1313. The linear motor mover group includes 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 plurality of gravity energy storage elements 900 are continuously pushed into the power tunnel 131 by the high altitude section 120, the bottom mover 310, the top mover 320 and the side mover 330 are respectively electromagnetically coupled with the bottom stator 210, the top stator 220 and the side stator 230 to convert electric energy into driving power, so as to drive the plurality of gravity energy storage elements 900 to continuously push and move to the high altitude section 120, and when the plurality of gravity energy storage elements 900 are continuously pushed into the power tunnel 131 by the high altitude section 120, the plurality of gravity energy storage elements 900 are continuously pushed through the power tunnel 131 by gravity, and the bottom mover 310, the top mover 320 and the side mover 330 are respectively electromagnetically coupled with the bottom stator 210, the top stator 220 and the side stator 230 to convert mechanical kinetic energy into electric 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 again to the high altitude section 120.
The gravity energy storage element moving track 100 is provided with a power tunnel 131, 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 and 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 synchronously rise so as to convert electric energy into power, thereby changing potential energy and storing the potential energy; the gravity energy storage elements 900 are continuously pushed to form solid gravity flow down, so that gravitational potential energy is converted into electric energy and fed back to the power grid.
In this embodiment, the gravity energy storage element moving rail 100 includes two parallel rails 101. The two parallel rails 101 are respectively matched with the rail wheels of the gravity energy storage element 900 in a rolling way so as to guide the gravity energy storage element 900 in a moving way. The rail 101 is fixed to a mountain having a large altitude 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 sloped section 130 is located at the slope of the mountain. The altitude difference between the high altitude section 120 and the low altitude section 110 is 800 m-3000 m or more than 3000 m. For example, the altitude of the low altitude section 110 is 1200m, and the altitude of the high altitude section 120 is 4200m. The gradient of the inclined section 130 is preferably in the range of 20 ° to 60 °, for example the gradient of the inclined section 130 is 30 °. For example, the inclined section 130 has a length of 6000m.
In this embodiment, the power tunnel 131 passes through the mountain 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 guide the gravity energy storage element 900. The power tunnel 131 is provided with an inner wall of the tunnel, and the bottom stator 210 is fixed between two rails 101 located in the tunnel, that is, a portion located between 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 stator 230 is fixed to a side of the tunnel inner wall, and the tunnel inner wall has two opposite sides, that is, two opposite tunnel sides 1313 are disposed in the power tunnel 131, and the two side stators 230 are respectively fixed to the two tunnel sides 1313. 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 1000 m-3000 m, 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 in each stage. The portion of the sloped section 130 outside of the power tunnel 131 constitutes a non-power track section that occupies a larger area of the sloped section 130.
The length of the power tunnel 131 is far smaller than that of the inclined section 130, and the inclined section 130 is correspondingly covered at the position 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 to drive the energy storage element to ascend on a mountain slope, electric energy is converted into potential energy of the solid gravity energy storage element 900, and the gravity energy storage element 900 is driven to slide downwards in cooperation with the power tunnel 131, so that gravitational potential energy is converted into electric energy.
It can be appreciated 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 gravity energy storage element 900 is driven by the linear motor to rise from the low altitude section 110 to the high altitude section 120, so that the linear motor consumes electric energy to perform work, and the gravity energy storage element 900 rises to the high altitude section 120, thereby storing gravity potential energy. When the gravity energy storage element 900 descends from the 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 to convert gravitational potential energy 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 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 in the power tunnel 131.
In this embodiment, the plurality of gravity energy storage elements 900 may be continuously arranged in the power tunnel 131, that is, in the process of energy storage or energy release, the lengths of the movers of the plurality of gravity energy storage elements 900 are approximately equal to the lengths of the stators in the power tunnel 131, so that the lengths of the plurality of movers are coupled with the full length of the stators in the power tunnel 131, and the full length of the stators of the long linear motor is in a load state, so as to obtain high power factor and high efficiency of the linear motor. There are always a plurality of gravity energy storage elements 900 continuously moving on the power tunnel 131 so that the gravity energy storage elements 900 continuously move along the gravity energy storage element moving track 100 throughout the course, thereby forming a solid gravity flow.
It can be appreciated 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 large altitude difference as gravity energy storage resource
1.1 the gravity energy storage element 900 naturally has potential energy due to the earth's gravitational attraction. The greater the relative value of the altitude of the gravity energy storage element 900, the greater the potential energy absolute value thereof; 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;
since the solid is the most basic material in nature, sand, soil, stones and the like are all basic materials of the earth, the materials are very abundant, the materials are convenient to obtain, the engineering forming treatment is easy, the shape cannot be changed with time, and the quality cannot disappear with time; the weight energy storage element 900 is inexpensive to manufacture from solid materials.
1.2 the potential energy density of the gravity energy storage element 900 depends on the absolute value of the difference in elevation of the position of the gravity energy storage element 900, i.e. the difference in elevation determines the potential energy density of the gravity energy storage element 900. That is, the selection of a large altitude difference is a preferred condition for increasing the potential energy storage density of the gravity energy storage element 900.
As the plateau and the mountain are basic forms of the earth, the plateau and the mountain are ubiquitous in different degrees in all continents of the world; the Asian plateau and the mountain are rich in geographic resources (the edge length of the Qinghai-Tibet plateau and the pamil plateau in China is 6000-7000 km, the altitude difference between the Qinghai-Tibet plateau and the basin can be 2000-3000 m, the topography condition is excellent, the site selection of the large altitude difference solid gravity energy storage power station is very favorable, the selectable geographic resources are rich (the actual engineering demand is less than 500 km according to the maximum demand), and the energy source transformation can be supported by the energy source transformation, the average altitude difference between the Qinghai-Tibet plateau and the pamil plateau and the surrounding plateau and basin can be more than 3000m, so that the solid gravity energy storage resources are very rich).
2. Innovative engineering means
The invention subverts and creates a method for forming solid gravity flow, which fluidizes the solid weight, so that the solid gravity flow is similar to liquid flow (water flow), is controlled to continuously flow (move) at high altitude and low altitude without interval under the action of power or gravity, and converts the electric power into the power according to different time zones of energy storage or energy release, so that the solid weight rises to the high position, changes the potential energy of the gravity, and realizes energy storage; or lowering the solid weight to a low position, converting the solid gravity into electric energy, and releasing the electric energy to the power grid. The principle is similar to that of a pumped storage power station based on liquid gravity flow. However, the large altitude difference solid gravity energy storage based on solid gravity flow utilizes rich geographic resources of the plateau, the mountain and the peripheral edge, and has sufficient resource guarantee; the altitude difference of the topography is large, the mass density of solid matters is large, the property is stable, the available quantity is almost unlimited, therefore, the solid gravity energy storage can be suitable for ultra-large scale energy storage, can bear the energy storage scale requirement required by complete energy transformation, and can provide key energy storage technical support for energy transformation revolution.
1. The design of the solid gravity energy storage element 900 with pushing bosses at front and back, side movers 330 at left and right sides, top movers 320 at top, bottom movers 310 at bottom and rolling wheels enables the gravity energy storage element 900 to continuously move, and facilitates the gravity energy storage element 900 to bear the thrust of the linear motor in the power tunnel 131 in an omnibearing manner, so that the driving efficiency is increased;
2. Selecting a terrain with large altitude difference, and constructing 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 in front of and behind the lifting channel, and when 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 a power tunnel) taking a linear motor as power is arranged at a low altitude section 110 of a lifting channel of the solid gravity energy storage element 900, the power tunnel 131 absorbs the power of a power grid to apply ascending power to the solid gravity energy storage element 900, or absorbs the gravity of the solid gravity energy storage element 900 to be converted into power, and the power is fed back to the power grid;
5. arranging a crane array at a high-altitude storage yard and a low-altitude storage yard for collecting solid gravity energy storage elements 900 from each stacking base to a track or dispersing the solid gravity energy storage elements from the track to each stacking base;
6. under the control of the system control unit, the collecting and dispersing speeds of the solid gravity energy storage elements 900 of the high and low altitude storage yards are coordinated and synchronous with the flow speed of the solid gravity flow, so that the solid gravity flow keeps unidirectional continuous movement in the functional time zone of energy storage or energy release, and the highest operation efficiency of the system is obtained.
The altitude difference between the plateau, the mountain and the surrounding plain and the 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 is changed and stored, and the energy storage purpose is achieved. Therefore, engineering techniques suitable for achieving lifting and transferring of a large number of gravity energy storage elements 900 in a unit time between large altitude differences are the key innovation of the present 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 which generate power; the power tunnel section is a power tunnel 131, and the power tunnel section generates all power required by the ascending and descending of the solid gravity flow on the lifting channel of the solid gravity energy storage element 900 or carries all thrust of the descending of the solid gravity flow of the lifting 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 the main power section of the power tunnel is shortened to the greatest extent (the length of the high-thrust linear motor is shortened), roadbed treatment of the power tunnel is enhanced, the roadbed treatment can bear thrust exerted by the gravity of the whole-course solid gravity energy storage element 900 of the lifting channel, and the gravity of the solid gravity energy storage element 900 of the non-power track section only exerts partial pressure on the roadbed and does not exert thrust in the low-altitude direction because the power tunnel section bears the thrust exerted by the gravity of the whole-course solid gravity energy storage element 900 of the lifting channel; thereby greatly simplifying the roadbed treatment of the unpowered track section, reducing the manufacturing cost and maximally reducing the system investment. It is envisioned that: the length of the power tunnel (power tunnel 131) is only one section of the length of the lifting channel of the solid gravity energy storage element 900, and the investment density is concentrated to the section, but the concentration is not proportional, so that a great amount of investment can be saved compared with the whole-course power structure.
Further, as shown in fig. 2, 3 and 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 of the second limit rail 1315.
In this embodiment, the first limit rail 1314 and the second limit rail 1315 are disposed to protrude from the inner wall of the tunnel. The side stator 230 is disposed between the first and second limit rails 1314 and 1315 on the same side. The first stopper rail 1314 and the second stopper rail 1315 are stopper rails. The first stop rail 1314 has a first stop face remote from the tunnel inner wall and the second stop rail 1315 has a second stop face remote from the tunnel inner wall. 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 the gap between the side stator 230 and the side rotor 330 is limited to be kept in a certain range, stable electromagnetic coupling of 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 at least partially protrude from the sides of the gravity energy storage element 900. The rotation axis of the first side limiting wheel 901 is parallel to the first limiting end surface, and the rotation axis of the second side limiting wheel 902 is parallel to the second limiting end surface. The outer circumferential surface of the first side limiting wheel 901 is matched with the first limiting end surface, and the outer circumferential surface of the second side limiting wheel 902 is matched with the second limiting end surface. The side mover 330 is positioned 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 tank 903, and the tank 903 is provided with a filling cavity, and the filling cavity is filled with a solid material. The rail wheel is disposed at the bottom of the box 903. The bottom mover 310 is disposed at the bottom of the case 903 and is located between two rows of the rail wheels 904. The top of the box 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. Two of the stacking bosses 909 are adjacent to opposite side walls of the case 903. The first side limiting wheel 901 is disposed on the stacking boss 909 and partially protrudes with respect 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 adjacent to a bottom of the case 903. The side mover 330 is fixed to a side wall 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 segment 140 connects the incline segment 130 and the low altitude segment 110 so that the gravity energy storage element 900 can smoothly enter the incline segment 130 from the low altitude segment 110. The high altitude arc 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 near the low altitude section 110, so that the plurality of gravity energy storage elements 900 can quickly enter the power tunnel 131 after entering the inclined section 130 from the low altitude arc section 140, and the power tunnel 131 obtains 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, and energy storage is realized.
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 a 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 has been applied in the field of rail transit, and the comprehensive performance advantage of the linear motor is reflected. But the energy conversion efficiency of the linear motor is lower than that of the rotary motor, and the linear motor is a disadvantage that must be overcome as an energy storage application.
The full-area coupling between the inner diameter of the stator and the outer diameter of the rotor of the rotating motor is realized, and the tangential thrust generated by the travelling wave magnetic field of the stator is fully and effectively acted on the rotor; the air gap between the stator and the rotor has small value, small air gap magnetic resistance loss and high efficiency.
However, in the existing linear motor applications such as magnetic levitation trains and electromagnetic ejectors, the stator of the linear motor is coupled with the rotor, the length for generating electromagnetic thrust is only a small section of a part of the energizing length of the stator, and the rest of the energizing length of the stator is in an unloaded energizing 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 device 1000 provided in the present application is coupled with the lengths of the bottom movers 310 of the gravity energy storage elements 900 in full length and in full 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 with the lengths of the top movers 320 of the plurality of gravity energy storage elements 900 in a full length and in a full length manner, and keeps the moving-out and moving-in of the top movers 320 balanced in real time so that the coupling degree is constant, and the side stator 230 is coupled with the lengths of the side movers 330 of the plurality of gravity energy storage elements 900 in a full length and in a full length manner, and keeps the moving-out and moving-in of the side movers 330 balanced in real time so that the coupling degree is constant. The full length tangential planes between the stator and the mover in the power tunnel 131 generate effective thrust, thereby greatly improving the energy conversion efficiency of the linear motor for energy storage application.
The stator is installed by tunnel inner wall and rail 101 to power tunnel 131, and stator firm intensity is high, and bottom active cell 310, top active cell 320 and lateral part active cell 330 are limited to first lateral part spacing wheel 901, second lateral part spacing wheel 902 respectively with first spacing rail 1314, second spacing rail 1315 to make bottom active cell 310, top active cell 320 and lateral part active cell 330 respectively with the bottom stator 210, the air gap between top stator 220 and the lateral part stator 230 be convenient for less design take-off, further improve efficiency.
The power tunnel 131 is a power core of the system, and when the system stores energy, the power of the power grid is converted into power for pushing the gravity energy storage element 900 to move the track 100 along the gravity energy storage element to ascend; when the system releases energy, the power tunnel 131 converts mechanical thrust of the gravity energy storage elements 900 forming solid gravity flow on the gravity energy storage element moving track 100 into electric power to be fed back to the electric power grid.
The power tunnel 131 is the most important part of the system, improves the thrust density of the main power section, shortens the length of the power tunnel 131, can reduce the underground foundation engineering cost of the gravity energy storage element moving track 100, reduces the cost of the power tunnel 131, reduces the operation maintenance cost and other practical and potential advantages, and the solid gravity flow carrying device 1000 of the present application improves the thrust density of the unit length of the power tunnel 131 so as to shorten the length of the power tunnel 131, and adopts the following modes to achieve the above purposes:
1. The linear motor stators are arranged at the inner wall of the tunnel and the bottom, the top and the two side parts in the tunnel, and the linear motor movers formed by the induction plates are arranged at the bottom, the top and the two side parts of the solid gravity energy storage element, so that the electromagnetic coupling area of the unit length of the power tunnel is increased, and the tangential thrust of the unit length is improved.
As a specific embodiment, the altitude of the low altitude section 110, the altitude of the high altitude section 120 and the altitude of the low altitude section 110 and the high altitude section 120 are 1200m, the altitude difference between the low altitude section 110 and the high altitude section 120 is 3000m, the gradient of the inclined section 130 is 30 degrees, and the gradient length of the inclined section 130 is 6000m.
The cross section of the gravity energy storage element 900 is set according to 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, the cross section area of the gravity energy storage element 900 is 10.24m2, and the cross section area of the gravity energy storage element 900 is 10m2.
The gravity energy storage element 900 comprises a tank 903, wherein the tank 903 is a steel tank-type shell, waste rocks and sand are filled in the tank 903, the average mass density of the tank 903 and the internal filler is 2500kg/m3, and the weight per unit length=25000 kg/m.
The total ramp length load g2.5=25000 (kg) ×6000 (m) = 150000000kg of the inclined section 130, and the total thrust f2.5= 150000000 (kg) ×9.8×sin30=735 (MN) of the solid gravity flow formed by the multiple force energy storage element 900 of the inclined section 130.
The tangential thrust per unit area of the coupling surfaces of the bottom stator 210 and the bottom rotor 310, the top stator 220 and the top rotor 320, and the side stator 230 and the side rotor 330 are all 0.05MN/m2, the total side length of the periphery of the gravity energy storage element 900 is 7.2m, and the tangential thrust per unit length of the power tunnel is 0.36MN.
Power tunnel 131 length l=735 (MN)/(0.36 mn= 2041.67 m).
Considering that the acceleration thrust margin is multiplied by the length L of the power tunnel segment 131 of 1.2 coefficient to take a value of 2500m, the length of the power tunnel is about 40% of the total length 6000m of the gravity energy storage element moving track 100.
Let v4=4 (m/s) of the solid gravity flow rate formed by the plurality of energy storage elements.
The required total power 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 p4=735 (MN) ×4 (m/s) = 2940000 (kw).
I.e. the unit stores 294 kilowatt-hours per hour (theoretical) and 1600 hours per year, and stores 470400 kilowatt-hours of electricity.
Further, referring to fig. 1, 2 and 4, the gravity energy storage element moving rail 100 is provided with two side-by-side rails 101, two rows of rail wheels 904 are provided at the bottom of the gravity energy storage element 900, the two rows of rail wheels 904 are respectively engaged with the two rails 101, and the bottom runner 310 is located between the two rows of rail wheels 904. As the gravity energy storage element 900 passes through the power tunnel 131, the bottom mover 310 is electromagnetically coupled to the bottom stator 210, so as to drive the gravity energy storage element 900 to move along the two rows of rails 101.
Further, referring to fig. 5, 6 and 7, the low altitude section 110 has a low altitude collecting and distributing section 111, a low altitude buffer transport section 112 and a low altitude pickup section 113 connected in sequence, the low altitude collecting and distributing section 111 is used for collecting and transporting the gravity energy storage element 900, the low altitude buffer transport section 112 transfers and transports the gravity energy storage element 900 between the low altitude collecting and distributing section 111 and the low altitude pickup section 113, and the low altitude pickup section 113 is used for pushing the gravity energy storage element 900 to the inclined section 130 when storing energy.
In this embodiment, the low altitude distribution section 111 distributes the gravity energy storage elements 900 delivered to the low altitude section 110 on the track, so that the gravity energy storage elements 900 are to be stored in a stacked manner, or the gravity energy storage elements 900 stored in a stacked manner are distributed on the track. The low-altitude buffer transport section 112 transports the gravity energy storage element 900 of the low-altitude distribution section 111 to the low-altitude pick-up section 113 or transports the gravity energy storage element 900 of the low-altitude pick-up section 113 to the low-altitude distribution section 111. The low altitude pick-up section 113 receives and conveys the low altitude buffer conveying section 112 from the gravity energy storage element 900 of the low altitude arc section 140, or pushes the gravity energy storage element 900 conveyed by the low altitude buffer conveying section 112 to the low altitude arc section 140.
Further, the linear motor stator set includes a low-altitude motor stator 290 fixed to the low-altitude collecting and distributing section 111, the low-altitude buffer transport section 112 and the low-altitude pickup 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 collecting and distributing section 111, the low-altitude buffer transport section 112 and the low-altitude pickup 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 collecting and distributing section 111 is electrically connected with different converters in the low-altitude collecting and distributing section 111, the low-altitude buffer conveying section 112 and the low-altitude receiving and delivering section 113 respectively. Specifically, the low-altitude motor stator 290 of the low-altitude collecting and distributing section 111 is electrically connected to n+1 collecting and distributing section differential converters 2902, the low-altitude motor stator 290 of the low-altitude buffer transport section 112 is electrically connected to the buffer section converters 2903, and the low-altitude motor stator 290 of the low-altitude pick-up section 113 is electrically connected to the pick-up section converters 2904, so that the gravity energy storage element 900 has different movement rates in the low-altitude collecting and distributing section 111, the low-altitude buffer transport section 112 and the low-altitude pick-up section 113, and the gravity energy storage element 900 is transported in the low-altitude section 110 conveniently.
Further, the high altitude section 120 has a high altitude collecting and distributing section 121, a high altitude buffer transport section 122 and a high altitude pickup section 123 connected in sequence, the high altitude collecting and distributing section 121 is used for collecting and distributing the gravity energy storage element 900, the high altitude buffer transport section 122 transfers and transports the gravity energy storage element 900 between the high altitude collecting and distributing section 121 and the high altitude pickup section 123, and the high altitude pickup section 123 is used for pushing the gravity energy storage element 900 to the inclined section 130 when releasing energy.
In this embodiment, the high altitude mass distribution section 121 distributes the gravity energy storage elements 900 delivered to the high altitude section 120 on the track, so that the gravity energy storage elements 900 are to be stored in a stacked manner, or the gravity energy storage elements 900 stored in a stacked manner are distributed on the track. The high-altitude buffer transportation section 122 is used for transporting the gravity energy storage element 900 distributed in the high-altitude distributing section 121 to the high-altitude delivering section 123 or transporting the gravity energy storage element 900 in the high-altitude delivering section 123 to the high-altitude distributing section 121. The high altitude pickup section 123 receives and conveys the gravity energy storage element 900 from the raised gravity energy storage element 900 of the high altitude arc section 150 to the high altitude buffer conveying section 122, or pushes the gravity energy storage element 900 conveyed from the high altitude buffer conveying section 122 to the high altitude arc 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 buffer transport section 122 and the high altitude pickup section 123, and the high altitude motor stator 280 is coupled with the bottom mover 310 battery to drive the gravity energy storage element 900 to move at the high altitude distribution section 121, the high altitude buffer transport section 122 and the high altitude pickup 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 collecting and distributing section 121 is electrically connected with different converters in the high-altitude collecting and distributing section 121, the high-altitude buffer conveying section 122 and the high-altitude receiving and delivering section 123 respectively. Specifically, the high-altitude motor stator 280 of the high-altitude collecting and distributing section 121 is electrically connected to n+1 collecting and distributing section distinguishing converters 2802, the high-altitude motor stator 280 of the high-altitude buffer transport section 122 is electrically connected to the buffer section converters 2803, and the high-altitude motor stator 280 of the high-altitude pick-up section 123 is electrically connected to the pick-up section converters 2804, so that the gravity energy storage element 900 has different movement rates in the high-altitude collecting and distributing section 121, the high-altitude buffer transport section 122 and the high-altitude pick-up section 123, and the gravity energy storage element 900 is transported in the high-altitude section 120 conveniently.
Further, the solid gravity flow carrying device 1000 further comprises a low altitude braking section 160, wherein the low altitude braking section 160 is connected to the end of the low altitude section 110 remote from the power tunnel 131 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 element 900 that converts gravitational potential energy into electric energy, so that the gravity energy storage element 900 is safely stopped, and collision damage of other objects caused by inertial kinetic energy of the gravity energy storage element 900 is avoided. The low elevation braking section 160 brakes the gravity energy storage elements 900 located at the front, thereby braking the gravity energy storage elements 900 forming solid gravity flow for the whole continuity, facilitating the distributed placement and stacking of the plurality of gravity energy storage elements 900 at low elevation.
Specifically, referring to fig. 8 and 9, the low altitude brake section 160 is provided with a brake tunnel 180 and a plurality of brake elements 181 disposed in the brake tunnel 180, the plurality of brake elements 181 sequentially and continuously abut against each other in the brake tunnel 180, at least one pair of brake pads 182 are disposed on the outer side of the brake elements 181, a brake rail 183 matched with the at least one pair of brake pads 182 is disposed in the brake tunnel 180, and when the gravity energy storage element 900 abuts against the brake elements 181 and the at least one pair of brake pads 182 clamp the brake rail 183, the gravity energy storage element 900 is braked by the brake elements 181.
In this embodiment, the braking tunnel 180 at low altitude interfaces with the low altitude distribution segment 111. A plurality of the braking elements 181, which are consecutively abutted, are movable within the braking tunnel 180 so as to absorb the kinetic energy of the gravitational energy storage element 900. Specifically, the braking element 181 is provided with a plurality of pairs of braking flaps 182 on both left and right side walls. The pairs of brake pads 182 are arranged on the side wall of the brake element 181 at intervals along an upper line and a lower line. The brake rails 183 are arranged on the inner side wall of the brake tunnel 180 along an upper line and a lower line. The brake rail 183 arranged along the upper straight line is matched with the pairs of brake pads 182 arranged along the upper straight line. The brake rail 183 arranged along the lower straight line is engaged with the pair of brake pads 182 arranged along the lower straight line. Each pair of the brake shoes 182 includes two mutually opening and closing shoes. When the two brake pads are closed and clamped on the brake rail 183, the friction force between the brake pads 182 and the brake rail 183 is used for preventing the brake element 181 from moving. The plurality of brake braking elements 181 are used for abutting, so that the matching length of the plurality of brake braking elements 181 and the brake rail 183 is increased, the braking force is increased, and the plurality of gravity energy storage elements 900 forming 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, two rows of braking element rail wheels 184 matched with the two braking section rails 185 are disposed at the bottom of the braking element 181, the linear motor rotor set further includes a reset motor rotor 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 rotor 370 is coupled with the track motor stator 270 to drive the braking element 181 to move along the braking section rails 185 for reset. When the two brake pads are opened and separated from contact with the brake rail 183, the return motor rotor 370 and the return motor stator are coupled to drive the brake braking element 181 to move in the brake tunnel, so that the brake braking element 181 can be reset, and the next brake braking element 181 is convenient to brake the gravity energy storage element 900.
Further, a brake bracket 186 is disposed on the 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 braking element 181 is provided with two brake brackets 186 arranged vertically on both left and right side walls. 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 with the plurality of pairs of brake shoes 182 which are linearly arranged in the upper row, and the lower brake bracket 186 is movably connected with the plurality of pairs of brake shoes 182 which are linearly arranged in the lower row. The driving member 1861 applies a driving force for opening or closing the brake lining 182. The upper pairs of brake pads 182 are staggered with the lower pairs of brake pads 182 to uniformly distribute the braking resistance of the braking elements 181, so that the braking elements effectively brake the plurality of gravity energy storage elements 900 forming the solid gravity flow. Two braking brackets 186 are respectively arranged on two opposite sides of the braking element 181, the two braking brackets 186 are respectively close to the top and the bottom of the braking element 181, and a plurality of driving pieces and a plurality of pairs of braking brake pads 182 are arranged on each braking bracket 186.
Further, referring to fig. 10, the front and rear ends of the gravity energy storage element 900 are respectively provided with a pushing boss 905 and a pushing concave 906, the pushing boss 905 at the front of the box 903 of the gravity energy storage element 900 is propped against the pushing concave 906 at the rear of the box 903 of the gravity energy storage element 900, the pushing concave 906 at the rear end of the box 903 of the gravity energy storage element 900 is propped against the pushing boss 905 at the front of the box 903 of the gravity energy storage element 900, and the whole gravity energy storage elements 900 from the low altitude section 110 to the high altitude section are propped in series, and are linked in whole course under the action of power or gravity, so as to form a solid gravity flow.
In this embodiment, the gravity energy storage element 900 includes a case 903 and four rail wheels 904 rotatably connected to the bottom of the case 903 (the rail wheels 904 may be multiple pairs or multiple groups), and the case 903 is configured to accommodate solid gravity objects therein. The side movers 330 are fixed to the left and right sides outside the case 903. The pushing boss 905 and the pushing concave 906 are respectively disposed at front and rear sections outside the case 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, stones, etc. Four rail wheels 904 are in rolling engagement with the two rails 101 of the gravity energy storage element moving rail 100, two by two, so that the gravity energy storage element 900 can be running in a solid gravity flow. The gravitational energy storage element 900 may be transferred and stored. The box 903 and the rail wheel 904 are made of steel materials, so that the gravity energy storage element 900 is stable and durable in structure, low in manufacturing cost and high in mass density.
In this embodiment, the pushing boss 905 and the pushing recess 906 are respectively fixed to the front and rear ends of the case 903. The end of the pushing boss 905 remote from the case 903 is provided with an arc-shaped protrusion, and the end of the pushing concave 906 is provided with an arc-shaped recess. When the pushing boss 905 and the pushing concave 906 of two adjacent gravity energy storage elements 900 are abutted against each other, the arc-shaped protrusions and the arc-shaped depressions are matched, so that the two adjacent gravity energy storage elements 900 are effectively connected, further, solid gravity flow is effectively formed, and after the solid gravity flow finishes gravity potential energy storage or gravity potential energy release, the gravity energy storage elements 900 are quickly separated from the arc-shaped depressions through the arc-shaped protrusions, so that the gravity energy storage elements 900 are quickly transferred and stored. Of course, in other embodiments, an arc-shaped recess may be formed at the end of the pushing boss 905, and an arc-shaped protrusion may be formed at the end of the pushing recess 906.
Further, a wheel void is provided on top of the box 903 for receiving a portion of the rail wheel 904 when the gravity energy storage elements 900 are stacked on top of each other.
In this embodiment, four wheel empty areas are provided on the top of the box 903, and the depth of the wheel empty areas is slightly greater than the height of the rail wheel 904 extending out of the box 903. When the gravity energy storage elements 900 are stacked, the portion of the rail wheel 904 protruding out of the box 903 of one gravity energy storage element 900 is just accommodated in the wheel vacancy area of the other gravity energy storage element 900, and the bottom of the upper gravity energy storage element 900 is abutted against the top of the lower gravity energy storage element, so that the stacked gravity energy storage elements 900 are stacked firmly. The wheel void area is formed in the stacking boss, so that the gravity energy storage element 900 can be effectively stacked.
Further, referring to fig. 11 and 12, the embodiment of the present application further provides an energy storage system 2000, the energy storage system 2000 includes the solid gravity flow carrying device 1000, the energy storage system 2000 further includes a low elevation yard 2100 and a high elevation yard 2200, the low elevation section 110 extends through the low elevation yard 2100, the high elevation section 120 extends through the high elevation yard 2200, the low elevation yard 2100 conveys the gravity energy storage element 900 to the low elevation section 110 when the energy storage system 2000 stores energy, the high elevation yard 2200 receives and stores the gravity energy storage element 900 from the high elevation section 120, and the high elevation yard 2200 conveys the gravity energy storage element 900 to the high elevation section 120 when the solid gravity energy storage system 2000 releases energy, and the low elevation yard 2100 receives and stores the gravity energy storage element 900 from the low elevation section 110.
In this embodiment, the plurality of gravity energy storage elements 900 on the whole-course lifting track are in rolling fit with the gravity energy storage element moving track 100, that is, the plurality of gravity energy storage elements 900 can be continuously pushed and lifted along the gravity energy storage element moving track 100 by electromagnetic thrust generated by the cooperation of the bottom stator 210, the top stator 220 and the side stator 230 in the power tunnel 131 with the bottom mover 310, the top mover 320 and the side mover 330 of the gravity energy storage element 900, respectively, and the plurality of gravity energy storage elements 900 can also be continuously pushed and lifted 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 continuously descends and links. The plurality of gravity energy storage elements 900 are continuously arranged to move in the inclined section 130 such that the plurality of gravity energy storage elements 900 form a solid gravity flow throughout the whole time flowing over the inclined section 130. When the gravity flow of the solid flows upwards along the inclined section 130, the redundant electric energy of the electric network is converted into gravitational potential energy of the plurality of gravity energy storage elements 900, and the gravitational potential energy of the plurality of gravity energy storage elements 900 is stored. As the solid gravity flow descends in the sloped section 130, the gravitational potential energy of the plurality of gravity energy storage elements 900 is converted into electrical energy that is fed back to the grid.
In this embodiment, the low-altitude yard 2100 is configured to store the gravity energy storage device 900 at a low altitude when the system releases energy, and to raise the gravity energy storage device 900 of the low-altitude yard 2100 to a high altitude when the system stores energy next time. The high-altitude yard 2200 is used for storing the gravity energy storage element 900 rising to the high-altitude place when the system stores energy, and lowering the gravity energy storage element 900 of the high-altitude yard 2200 to the low-altitude place when the next system releases energy.
Further, the low elevation yard 2100 is provided with a low elevation palletizing zone which is in butt joint with the low elevation section 110 and is used for stacking and storing the gravity energy storage elements 900 when the system releases energy, and the high elevation yard 2200 is provided with a high elevation palletizing zone which is in butt joint with the high elevation section 120 and is used for stacking and storing the gravity energy storage elements 900 when the system stores energy.
In this embodiment, the low-altitude palletizing area receives the gravity energy storage elements 900 from the low-altitude distributing section 111, and stacks the gravity energy storage elements 900 in a plurality of rows and columns 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 in the form of solid gravity flow through the gravitational energy storage element moving track 100 to the low altitude distribution section 111, and is transferred and stacked to the low altitude palletizing area at the low altitude distribution section 111. When the energy storage system 2000 needs to convert the electric energy of the electric network into gravitational potential energy for storage, the gravitational energy storage elements 900 stacked in the low-altitude stacking area are transferred to the low-altitude collecting and distributing section 111 and are continuously transported to the high-altitude place in a flowing manner in the form of solid gravity flow, so that gravitational potential energy storage is realized. The high-altitude palletizing region receives the gravity energy storage elements 900 from the high-altitude distribution section 121 and stacks the gravity energy storage elements 900 in a plurality of rows and columns to save the occupied area. 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 palletizing region is transferred to the high-altitude distribution section 121, and flows to the low-altitude place in the form of solid gravity flow at the high-altitude distribution section 121 through the gravitational energy storage element moving rail 100.
Further, the low-altitude stacking area and the high-altitude stacking area are respectively provided with a transverse track beam 2300, a crane cart 2310 matched with the transverse track beam 2300, a left stacking crane matched with the crane cart 2310, a right stacking crane and a loading and unloading crane, wherein the left stacking crane and the right stacking crane operate on the left side and the right side of the low-altitude section 110 or the high-altitude section 120, the loading and unloading crane operate 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 crane and the right stacking crane 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 rail beam 2300 may guide the left stacking crane to move in the left stacking area, so as to transfer or place the gravity energy storage element 900 in the left stacking area. The transverse rail beam 2300 may guide the right stacking crane to move in the stacking area on the opposite side to transfer or place the gravity energy storage elements 900 in the stacking area on the opposite side, so that the gravity energy storage elements 900 are stacked in the stacking area on the opposite side in both the low elevation stacking area and the high elevation stacking area, or the gravity energy storage elements 900 are quickly transferred from the stacking area on the opposite side to the gravity energy storage element moving rail 100.
In this embodiment, the loading and unloading crane can move left and right so as to transfer the gravity energy storage element 900 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 lifting the gravity energy storage element 900. The loading and unloading crane is provided with a lifting hook, and the lifting hook can lift the gravity energy storage element 900 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 power grid access device 2500, and a power grid, where the power grid access device 2500 is electrically connected to the linear motor stator set, and the power grid access device 2500 is further electrically connected to the power grid, so as to absorb electric energy of the power grid through the linear motor stator set and the linear motor rotor set, or release electric energy to the power grid.
In this embodiment, the system main controller 2400 controls the power grid access device 2500 to input the electric energy of the power grid to the linear motor stator set and the linear motor rotor set to generate power, so that the gravity energy storage element 900 in the whole course of the inclined section 130 transfers and conveys from the low altitude to the high altitude in the form of solid gravity flow, thereby converting the electric energy of the power grid into kinetic energy to change the potential energy of the solid gravity energy storage element 900 for storage. The system main controller 2400 also controls the electronic stator group and the linear motor sub-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 controls the grid access device 2500 to receive the electric energy generated by coupling the main power stator and the main power mover and feed the electric energy back to the 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, the first main power converter 2809, the second main power converter 2808, the third main power converter 2807, 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, to control the power of the power tunnel.
Further, the energy storage system 2000 further includes a low elevation yard control module 2600 and a high elevation yard control module 2700, the low elevation yard control module 2600 is configured to control the separation or loading of the gravity energy storage element 900 of the low elevation yard 2100 from the low elevation section 110, the high elevation yard control module 2700 is configured to control the separation or loading of the gravity energy storage element 900 of the high elevation yard 2200 from the high elevation section 120, and the main controller is electrically connected to the low elevation yard control module 2600 and the high elevation yard control module 2700. The low elevation yard control module 2600 controls the operation of the gravity energy storage element 900 of the low elevation yard 2100. The high elevation yard control module 2700 controls the movement of the gravity energy storage element 900 of the high elevation yard 2200 to facilitate the energy storage or energy release automation of the energy storage system 2000.
The foregoing is a preferred embodiment of the application and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the application and are intended to be within the scope of the application.
Claims (19)
- A solid gravity flow carrying device is characterized by comprising a plurality of gravity energy storage elements, a gravity energy storage element moving track, a linear motor stator group and a linear motor rotor group, wherein the gravity energy storage element moving track is used for guiding the lifting movement of the gravity energy storage elements, 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 positioned 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 group 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 rotor 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 on the bottom, the top and the side of the gravity energy storage elements, when a plurality of gravity energy storage elements are continuously pushed into 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 a plurality of 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 into the power tunnel by the high altitude section, a plurality of gravity energy storage elements continuously push and pass 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 plurality of gravity energy storage elements continue to continuously push and move to the low-altitude section so as to be lifted to the high-altitude section power tunnel again next time.
- The solid gravity flow carrying device according to claim 1, wherein a first limit rail and a second limit rail are arranged on the side portion of the tunnel, 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 top portion and the bottom portion of the tunnel, a first side limit wheel and a second side limit wheel are arranged on the side portion of the gravity energy storage element, 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 face of the first limit rail and the end face of the second limit rail.
- The solid gravity flow carrying device according to claim 1, wherein the motive tunnel is arranged at a portion of the inclined section adjacent to the low elevation section.
- The solid gravity flow carrying device 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 rail wheels, the rail wheels are respectively matched with the rails, and the bottom runner is positioned between the two rows of rail wheels.
- The solid gravity flow carrying device according to claim 1, wherein the low elevation section has a low elevation bulk section, a low elevation buffer transport section and a low elevation pick-up section connected in sequence, the low elevation bulk section for bulk transport of the gravity energy storage element, the low elevation buffer transport section transferring transport of the gravity energy storage element between the low elevation bulk section and the low elevation pick-up section, the low elevation pick-up section for pushing the gravity energy storage element to the incline section when storing energy.
- The solid gravity flow carrying device according to 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 pickup 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 pickup section.
- The solid gravity flow carrying device according to claim 1, wherein the high altitude section has a high altitude bulk section for bulk transport of the gravity energy storage element, a high altitude buffer transport section for transfer transport of the gravity energy storage element between the high altitude bulk section and the high altitude pick-up section, and a high altitude pick-up section for pushing the gravity energy storage element to the inclined section upon release of energy, connected in sequence.
- The solid gravity flow carrying device according to claim 7, wherein the linear motor stator set comprises a high altitude motor stator fixed to the high altitude distribution section, high altitude buffer transport section and high altitude pickup 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 distribution section, high altitude buffer transport section and high altitude pickup section.
- The solid gravity flow carrying device according to 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 that brakes solid gravity flow into the low altitude section when the system instructs or fails to shut down.
- The solid gravity flow carrying device according to claim 9, wherein the low altitude braking section comprises a braking tunnel and a plurality of braking elements arranged in the braking tunnel, the plurality of braking elements are sequentially and continuously propped against each other in the braking tunnel, at least one pair of braking brake pads are arranged on the outer side of the braking elements, a braking rail matched with the at least one pair of braking pads is arranged in the braking tunnel, and when the gravity energy storage element is propped against the braking elements and the at least one pair of braking pads clamp the braking rail, the braking elements brake the gravity energy storage element.
- The solid gravity flow carrying device according to claim 10, wherein the linear motor stator set further comprises a track motor stator fixed between two of the brake rails, the bottom of the brake element is provided with two rows of brake element track wheels, and the linear motor rotor set further comprises a reset motor rotor fixed at the bottom of the brake element and located between two rows of brake element track wheels, and the reset motor rotor is coupled with the track motor stator to drive the brake element to reset.
- The solid gravity flow carrying device according to claim 10, wherein a brake support is arranged on the outer side of the brake braking element, at least one driving member is arranged on the brake support, and each driving member correspondingly drives the brake shoe to clamp the brake rail.
- The solid gravity flow carrying device according to claim 12, wherein two brake supports are provided on opposite sides of the brake actuating member, the two brake supports being respectively adjacent the top and bottom of the brake actuating member, and a plurality of the driving members and a plurality of pairs of the brake pads are provided on each of the brake supports.
- The solid gravity flow carrying device 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 table, the pushing boss at the front part of the gravity energy storage element box body is propped against the pushing concave table at the rear part of the previous gravity energy storage element box body, the pushing concave table at the rear end of the gravity energy storage element box body is propped against the pushing boss at the front part of the next gravity energy storage element box body, and the whole gravity energy storage elements from the low altitude section to the high altitude section are propped in series, and are linked in whole course under the action of power or gravity to form solid gravity flow.
- An energy storage system comprising the solid gravity flow carrying device of any one of claims 1 to 14, the energy storage system further comprising a low elevation yard and a high elevation yard, the low elevation yard extending through the low elevation yard, the high elevation yard extending through the high elevation yard, the low elevation yard delivering the gravity energy storage element to the low elevation yard when the energy storage system is storing energy, the high elevation yard receiving and storing the gravity energy storage element from the high elevation yard, the high elevation yard delivering the gravity energy storage element to the high elevation yard when the solid gravity energy storage system is releasing energy, the low elevation yard receiving and storing the gravity energy storage element from the low elevation yard.
- The energy storage system of claim 15, wherein the low elevation yard is provided with a low elevation palletized region interfacing with the low elevation section for storing the gravity energy storage element stack upon system release, and wherein the high elevation yard is provided with a high elevation palletized region interfacing with the high elevation section for storing the gravity energy storage element stack upon system energy storage.
- The energy storage system of claim 16, wherein the low-altitude palletizing zone and the high-altitude palletizing zone are each provided with a traveling transverse rail beam, a left palletizing traveling vehicle and a right palletizing traveling vehicle which are matched with the traveling transverse rail beam, the left palletizing traveling vehicle and the right palletizing traveling vehicle run on the left and right sides of the low-altitude section or the high-altitude section, the loading and unloading traveling vehicle is installed at a position lower than the traveling transverse rail beam on the low-altitude section or the high-altitude section by a plurality of meters, and runs below between the left and right palletizing traveling vehicles to unload the gravity energy storage elements on the low-altitude section or the high-altitude section to the left and right sides of the low-altitude section or the high-altitude section, and then the gravity energy storage elements are stacked on the stacking zone on both sides of the low-altitude section or the high-altitude section by the left palletizing traveling vehicle and the right palletizing traveling vehicle, respectively.
- The energy storage system of claim 17, wherein the low elevation yard and the high elevation yard are each provided with a plurality of rows of traveling arrays, each row of the crane array is provided with a left stacking crane and a right stacking crane, and the loading and unloading crane is arranged between the left stacking crane and the right stacking crane and above the low altitude section or the high altitude section.
- The energy storage system of claim 15, further comprising a system master controller, an electrical grid access device and an electrical grid, the electrical grid access device electrically connected to the linear motor stator pack, the electrical grid access device further electrically connected to the electrical grid for absorbing electrical energy from the electrical grid or releasing electrical energy to the electrical grid via the linear motor stator pack and the linear motor rotor pack.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121466385 | 2021-06-29 | ||
| CN202110729624.7A CN113417817A (en) | 2021-06-29 | 2021-06-29 | Solid gravity flow carrying equipment and energy storage system |
| CN2021214663852 | 2021-06-29 | ||
| CN2021107296247 | 2021-06-29 | ||
| PCT/CN2022/077039 WO2023273365A1 (en) | 2021-06-29 | 2022-02-21 | Solid gravity flow carrying apparatus and energy storage system |
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| CN117280116A true CN117280116A (en) | 2023-12-22 |
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| CN202280034604.0A Pending CN117280116A (en) | 2021-06-29 | 2022-02-21 | Solid gravity flow carrying equipment and energy storage system |
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| WO (1) | WO2023273365A1 (en) |
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| CN116979704A (en) * | 2023-07-27 | 2023-10-31 | 中国长江三峡集团有限公司 | Gravity energy storage brick and tower gravity energy storage device with same |
| CN118504806B (en) * | 2024-07-10 | 2024-10-18 | 中南大学 | Complex mountain railway tunnel site selection and line optimization method, medium and equipment |
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| JP2007049855A (en) * | 2005-08-11 | 2007-02-22 | Chuden Gijutsu Consultant Kk | Power supply system for electrical equipment inside tunnel |
| CN102157951A (en) * | 2011-03-07 | 2011-08-17 | 无锡爱索思电力科技有限公司 | Energy storage system based on track transport |
| DE202013006785U1 (en) * | 2013-07-27 | 2014-10-29 | Hans Hagenmaier | Device for storing position energy |
| CN103867408A (en) * | 2014-03-24 | 2014-06-18 | 天津大学 | Gravity energy storing system relying on massif |
| GB2594526B (en) * | 2020-05-01 | 2022-08-31 | Gravitricity Ltd | Energy storage system |
| CN113027712A (en) * | 2021-04-20 | 2021-06-25 | 吴炎喜 | Solid gravity flow carrying equipment and energy storage system |
| CN113417817A (en) * | 2021-06-29 | 2021-09-21 | 吴炎喜 | Solid gravity flow carrying equipment and energy storage system |
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