CN110994880B - Flywheel energy storage system suitable for dredging ship - Google Patents
Flywheel energy storage system suitable for dredging ship Download PDFInfo
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- CN110994880B CN110994880B CN201911234337.8A CN201911234337A CN110994880B CN 110994880 B CN110994880 B CN 110994880B CN 201911234337 A CN201911234337 A CN 201911234337A CN 110994880 B CN110994880 B CN 110994880B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/02—Additional mass for increasing inertia, e.g. flywheels
- H02K7/025—Additional mass for increasing inertia, e.g. flywheels for power storage
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/20—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/10—Structural association with clutches, brakes, gears, pulleys or mechanical starters
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/18—Structural association of electric generators with mechanical driving motors, e.g. with turbines
- H02K7/1807—Rotary generators
- H02K7/1846—Rotary generators structurally associated with wheels or associated parts
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
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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
Abstract
The invention discloses a flywheel energy storage system suitable for a dredging ship, which comprises: a housing; a rotating shaft; a motor/generator stator; a motor/generator rotor; the flywheel is internally provided with a plurality of first auxiliary energy storage mechanisms; and the second auxiliary energy storage mechanism comprises a plurality of turntables, a plurality of cylinders and a plurality of cranks. The invention keeps the stable rotational inertia of the flywheel by improving the rotational inertia of the flywheel, greatly improves the charging and discharging power of the flywheel energy storage, effectively improves the energy conversion and output, further achieves the purpose of continuously supplying power for the driving motor of the ship and ensures the normal operation of dredging operation under emergency.
Description
Technical Field
The invention relates to the technical field of electrical equipment. More particularly, the present invention relates to a flywheel energy storage system suitable for use with dredging vessels.
Background
The main purposes of the dredging engineering are digging harbor ponds, entering harbor navigation channels and the like, hydraulic filling and land reclamation to build wharfs, harbor areas and harbor facing industrial areas, coastal urban land and entertainment and leisure land, beach maintenance, water conservancy flood control and reservoir area dredging, improvement and ecological restoration of water environments such as rivers, lakes and seas, construction and burying of various underwater pipeline ditches and the like. Dredging engineering has great effect on human social progress, environmental improvement and economic development.
The dredging engineering is usually required to enter by means of a ship, the dredging ship is in the operation process, the load and instability of a ship driving motor are caused due to the special underwater environment, the sudden increase and sudden decrease conditions exist, in order to adjust the load of the ship driving motor in time, people usually incorporate a high-power flywheel energy storage system on a direct current bus in a power supply system, the power operation condition of the system can be detected through a power supply intelligent management system, the load sudden change of the driving motor can be quickly responded through a flywheel energy storage device, when the driving motor of the ship is in low load, the redundant energy can be transmitted to a motor/generator of the flywheel energy storage system to be converted into mechanical energy of the flywheel for storage, and the motor/generator is charged at the moment; when the driving motor is in high load, the motor/generator is converted into a discharge mode, and the mechanical energy of the flywheel is converted into the electric energy output of the motor/generator, so that sufficient electric power can be provided for the driving motor in emergency.
The flywheel energy storage system needs external power supply equipment (driving motor) to input energy in advance to drive the flywheel to rotate, when the flywheel energy storage system needs to generate electricity, the flywheel continues to rotate by means of the inertia of the flywheel energy storage system, thereby driving the generator to mechanically work to generate electric energy, when the inertia of the flywheel is smaller and smaller, the generated electric energy is smaller and smaller, the discharge power of the motor/generator of the existing flywheel energy storage system is unstable, when the flywheel stops rotating after inertia disappears, the motor/generator needs external energy to charge, that is, the electric energy generated by the existing flywheel energy storage system is discontinuous, the driving motor can only be charged intermittently, the requirement of stable working performance of the dredging ship on the driving motor under emergency can not be met, and the defect seriously restricts the application of the flywheel energy storage system in the operation of the dredging ship.
Disclosure of Invention
An object of the present invention is to solve at least the above problems and to provide at least the advantages described later.
The invention also aims to provide a flywheel energy storage system suitable for a dredging ship, which keeps stable rotational inertia of a flywheel by improving the rotational inertia of the flywheel, greatly improves the charging and discharging power of flywheel energy storage, effectively improves the energy conversion and output, further achieves the aim of continuously supplying power to a driving motor of the ship and ensures the normal dredging operation under emergency conditions.
To achieve these objects and other advantages in accordance with the present invention, there is provided a flywheel energy storage system suitable for a dredging vessel, comprising:
the shell is of a closed cylindrical structure with a hollow interior;
the rotating shaft is coaxially arranged inside the shell, the upper end of the rotating shaft is rotatably connected with the inner wall of the top surface of the shell, the lower end of the rotating shaft is rotatably connected with the inner wall of the bottom surface of the shell through a dynamic sealing mechanism, and the bottom of the rotating shaft penetrates out of the bottom surface of the shell;
the motor/generator stator is sleeved on the upper part of the rotating shaft and is not contacted with the rotating shaft, and the motor/generator stator is fixedly connected with the inner wall of the shell;
a motor/generator rotor fixedly secured to the shaft and located inside the motor/generator stator;
the flywheel is of a hollow circular cylinder structure and is positioned below the motor/generator rotor, the outer wall of the inner ring of the flywheel is fixedly sleeved on the rotating shaft, and the outer wall of the outer ring of the flywheel is not in contact with the inner wall of the shell;
a plurality of first auxiliary energy storage mechanisms located inside the flywheel; any first auxiliary energy storage mechanism includes:
the two ends of the cross rod are respectively and fixedly connected with the inner wall of the inner ring of the flywheel and the inner wall of the outer ring of the flywheel, and the axis of the cross rod is intersected with the axis of the rotating shaft; the top of the cross bar is provided with a sliding chute extending along the length direction of the cross bar;
the metal rings are uniformly arranged at intervals along the axis direction of the cross rod, any metal ring is sleeved on the cross rod in a sliding manner, balls are fixedly arranged on the inner walls of the metal rings and are clamped in the sliding grooves in a sliding manner, any two adjacent metal rings are connected through a first spring, and one metal ring closest to the outer ring of the flywheel is connected with the inner wall of the outer ring of the flywheel through a second spring; any one of the first spring and the second spring is a compression spring;
when all the first springs and all the second springs are in a natural extension state, the mass distribution of the flywheel is uniform;
a second auxiliary energy storage mechanism located below the housing, the second auxiliary energy storage mechanism comprising:
the rotating shafts are arranged in the same direction, and the rotating shafts are arranged in the same direction;
the upper end and the lower end of each connecting block are fixedly connected with the corresponding two turntables respectively, and the two connecting blocks which are adjacent up and down are positioned on two sides of the rotating shaft respectively;
the device comprises a plurality of cylinders, a connecting block and a pressure gauge, wherein one cylinder is correspondingly arranged on one connecting block, nitrogen is filled in any cylinder, and the cylinder is provided with an air tap and the pressure gauge;
and one end of any crank is pivoted with the corresponding connecting block, and the other end of the crank is connected with a piston rod of the corresponding cylinder.
Preferably, the flywheel energy storage system suitable for the dredging ship comprises an inner shell and an outer shell which are sleeved with each other, a hollow interlayer space is formed between the inner shell and the outer shell, the top of the inner shell is provided with a refrigerant inlet, and the bottom of the inner shell is provided with a refrigerant outlet; the flywheel energy storage system suitable for a dredging vessel further comprises a cooling mechanism comprising:
a plurality of cooling pipes which are arranged at intervals along the axial direction of the rotating shaft, any cooling pipe is wound on the stator of the motor/generator, and two ends of each cooling pipe are communicated with the interlayer space;
the refrigerant agent storage tank is arranged above the shell and is communicated with an inlet of the refrigerant agent through a first pipe body and communicated with an outlet of the refrigerant agent through a second pipe body, the first pipe body is provided with a first valve, and the second pipe body is provided with a second valve, a pump body and a radiator.
Preferably, the flywheel energy storage system suitable for the dredging ship is characterized in that an annular first permanent magnet is arranged at the bottom of the flywheel and fixedly sleeved on the rotating shaft, an annular second permanent magnet is fixedly arranged on the inner wall of the bottom surface of the shell and opposite to the first permanent magnet, and the second permanent magnet and the first permanent magnet repel each other in magnetic property.
Preferably, the flywheel energy storage system suitable for the dredging ship is characterized in that lubricating oil is coated inside any sliding groove and on the outer surface of any ball.
Preferably, in the flywheel energy storage system suitable for a dredging vessel, a filtering mechanism is further arranged at one end of the second pipe body close to the refrigerant agent storage tank.
Preferably, the flywheel energy storage system suitable for the dredging ship further comprises a vacuum pump which is positioned at the lower part of the shell, and a suction pipe of the vacuum pump is communicated with the interior of the shell.
The invention at least comprises the following beneficial effects:
1. when the flywheel rotates, kinetic energy is in direct proportion to the rotational inertia of the flywheel, and the rotational inertia of the flywheel is in direct proportion to the power of 2 of the diameter of the flywheel and the mass of the flywheel; moment of inertia J ═ 0.5 to 1 x M x R2When the mass distribution of the flywheel is uniform, 0.5 is taken, and when the mass is completely concentrated on the edge, 1 is taken; according to the invention, the plurality of first auxiliary energy storage mechanisms are arranged in the flywheel, and in an initial state, the plurality of first auxiliary energy storage mechanisms are in a natural state in the flywheel, so that the overall mass distribution of the flywheel is uniform, and the driving force required by the rotation of the flywheel is small, namely the energy consumption is reduced; the flywheel energy storage system comprises a plurality of first auxiliary energy storage mechanisms, a plurality of metal rings, a plurality of second auxiliary energy storage mechanisms and a plurality of first auxiliary energy storage mechanisms, wherein the plurality of metal rings on any one first auxiliary energy storage mechanism move towards the edge of the flywheel along with the gradual increase of the rotating speed of the flywheel, so that the mass of the edge of the flywheel is increased, and the rotational inertia of the flywheel is increased; the plurality of first springs and the plurality of second springs in the first auxiliary energy storage mechanism have an energy storage function, so that the energy storage of the flywheel energy storage system is increased; the invention can greatly improve the charging and discharging power of flywheel energy storage, and effectively improve the energy conversion and output;
2. the rotation of the rotating shaft drives the plurality of turntables to rotate, so that piston rods of the plurality of cylinders are driven to reciprocate, when the piston rods of the cylinders move towards the direction close to the inside of the cylinders, gas in the cylinders is compressed, the compressed gas can generate thrust on the pistons, the piston rods are promoted to move towards the direction far away from the inside of the cylinders, and then the thrust is converted into the rotating force of the turntables, and finally the flywheel is driven to rotate, namely the second auxiliary energy storage mechanism always keeps reciprocating after the rotating shaft starts to rotate; when the flywheel energy storage system is switched from a charging mode to a discharging mode, a piston rod of the air cylinder always keeps reciprocating motion under the action of gas compression and expansion, so that the continuous rotation of the flywheel can be kept, the flywheel energy storage system can be discharged continuously, a driving motor of a ship can be charged continuously, and the stability of the working performance of the driving motor can be ensured;
3. in the long-term operation process of the flywheel energy storage system, under the condition of current concentrated discharge, the stator of the motor/generator has larger heat productivity, if the heat cannot be dissipated in time, the overhigh temperature can damage the stator of the motor/generator and the rotor of the motor/generator, so that the whole equipment is damaged, and in order to solve the technical problems, the invention further provides a heat dissipation mechanism which can dissipate the heat produced by the stator of the motor/generator and the heat in the shell in time, ensure the normal operation of the flywheel energy storage system, prolong the service life of the stator of the motor/generator and the rotor of the motor/generator, and dissipate the heat black in time to reduce the heat energy consumption; the invention introduces the refrigerant into the interlayer space of the shell, and can also radiate the heat of the bearing mechanism between the upper end of the rotating shaft and the top surface of the shell and the movable sealing mechanism between the lower end of the rotating shaft and the bottom surface of the shell, so as to radiate the heat of the bearing at the rotating part in time, ensure the normal operation of the bearing and further ensure the normal operation of the whole equipment.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.
Drawings
Fig. 1 is a schematic structural diagram of a flywheel energy storage system suitable for a dredging vessel according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a flywheel energy storage system suitable for a dredging vessel according to another embodiment of the present invention;
FIG. 3 is a top view of the flywheel of another embodiment of the present invention.
Detailed Description
The present invention is further described in detail below with reference to the drawings and examples so that those skilled in the art can practice the invention with reference to the description.
It will be understood that terms such as "having," "including," and "comprising," as used herein, do not preclude the presence or addition of one or more other elements or groups thereof.
It is to be noted that the experimental methods described in the following embodiments are all conventional methods unless otherwise specified, and the reagents and materials are commercially available unless otherwise specified.
In the description of the present invention, the terms "lateral", "longitudinal", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
As shown in fig. 1 to 3, the present invention provides a flywheel energy storage system suitable for a dredging vessel, comprising:
the shell 1 is a closed cylindrical structure with a hollow interior;
the rotating shaft 2 is coaxially arranged inside the shell 1, the upper end of the rotating shaft is rotatably connected with the inner wall of the top surface of the shell 1, the lower end of the rotating shaft is rotatably connected with the inner wall of the bottom surface of the shell 1 through a dynamic sealing mechanism, and the bottom of the rotating shaft penetrates out of the bottom surface of the shell 1;
a motor/generator stator 31 sleeved on the upper portion of the rotating shaft and not contacted with the rotating shaft, the motor/generator stator 31 being fixedly connected with the inner wall of the housing 1; the motor/generator stator 31 is connected to a power supply device of the ship;
a motor/generator rotor 32 fixed to the rotating shaft and located inside the motor/generator stator 31;
the flywheel 4 is of a hollow circular cylinder structure and is positioned below the motor/generator rotor, the outer wall of the inner ring of the flywheel 4 is fixedly sleeved on the rotating shaft, and the outer wall of the outer ring is not in contact with the inner wall of the shell 1;
a plurality of first auxiliary energy storage means located inside the flywheel 4; any first auxiliary energy storage mechanism includes:
the two ends of the cross rod 51 are respectively and fixedly connected with the inner wall of the inner ring of the flywheel 4 and the inner wall of the outer ring of the flywheel 4, and the axis of the cross rod 51 is intersected with the axis of the rotating shaft; the top of the cross bar 51 is provided with a sliding groove extending along the length direction thereof;
a plurality of metal rings 52, which are uniformly arranged along the axial direction of the cross bar 51 at intervals, any metal ring 52 is slidably sleeved on the cross bar 51, balls are fixedly arranged on the inner wall of the metal rings 52, the balls are slidably clamped in the sliding grooves, any two adjacent metal rings 52 are connected through a first spring 53, and the metal ring closest to the outer ring of the flywheel 4
52 is connected with the inner wall of the outer ring of the flywheel 4 through a second spring 54; either the first spring 53 and the second spring 54 is a compression spring;
wherein, when all the first springs 53 and all the second springs 54 are in a natural extension state, the mass distribution of the flywheel 4 is uniform;
a second auxiliary energy storage mechanism located below the housing 1, the second auxiliary energy storage mechanism comprising:
a plurality of rotating discs 61 which are arranged at intervals along the axial direction of the rotating shaft, wherein any rotating disc 61 is vertical to the rotating shaft, the circle center of the rotating disc is positioned on the extension line of the axial line of the rotating shaft, and the rotating disc 61 positioned at the uppermost part is fixedly connected with the bottom of the rotating shaft;
a plurality of connecting blocks 62, one connecting block 62 is correspondingly arranged between any two adjacent turntables 61, the upper end and the lower end of each connecting block 62 are fixedly connected with the corresponding two turntables 61, and any two connecting blocks 62 which are adjacent up and down are respectively positioned at two sides of the rotating shaft;
the air cylinders 64 are correspondingly arranged on one connecting block 62, nitrogen is filled in any one of the air cylinders 64, and an air nozzle 642 and a pressure gauge 643 are arranged on each air cylinder 64; an airtight core is plugged in the air tap 642, the pressure of the compressed gas inside the air cylinder 64 is monitored by looking at a pressure gauge 643, the airtight core is opened, and the gas is supplemented or extracted into the air cylinder 64 through the air tap 642, so that the pressure of the compressed gas inside the air cylinder 64 is controlled to be a proper pressure value;
one crank 63 is correspondingly arranged between a plurality of cranks 63 and one cylinder 64 and the corresponding connecting block 62, one end of any crank 63 is pivoted with the corresponding connecting block 62, and the other end is connected with the piston 641 of the corresponding cylinder 64.
In the above technical scheme, the working principle of the invention is as follows: when the ship is in low load, the flywheel energy storage system is in a charging mode, the electric energy of the ship driving motor is transmitted to the motor/generator stator 31, the motor/generator stator 31 generates a magnetic field after being electrified, the motor/generator rotor 32 is driven to rotate, the rotating shaft is driven to rotate, the flywheel 4 is driven to rotate, and the redundant electric energy of the driving motor is converted into kinetic energy to be stored; when the ship is in high load, the flywheel energy storage system is converted into a discharge mode to release energy to the driving motor, the flywheel 4 rotates under self inertia to drive the rotating shaft to continue rotating so as to drive the motor/generator rotor 32 to rotate, the motor/generator rotor 32 performs cutting magnetic induction line motion in the motor/generator stator 31 to generate current and transmit the current to the driving motor, and therefore the rotation kinetic energy of the flywheel 4 is converted into electric energy to be output to the driving motor;
the kinetic energy of the flywheel 4 is in direct proportion to the rotational inertia of the flywheel 4 when the flywheel 4 rotates, and the rotational inertia of the flywheel 4 is in direct proportion to the power of 2 of the diameter of the flywheel 4 and the mass of the flywheel 4; moment of inertia J ═ 0.5 to 1 x M x R2When the mass distribution of the flywheel 4 is uniform, 0.5 is taken, and when the mass is completely concentrated on the edge, 1 is taken; according to the invention, the plurality of first auxiliary energy storage mechanisms are arranged in the flywheel 4, and in an initial state, the plurality of first auxiliary energy storage mechanisms are in a natural state in the flywheel 4, the overall mass distribution of the flywheel 4 is uniform, and the driving force required by the rotation of the flywheel 4 is small, namely, the energy consumption is reduced; along with the gradual increase of the rotating speed of the flywheel 4, the plurality of metal rings 52 on any first auxiliary energy storage mechanism move towards the edge of the flywheel 4, so that the mass of the edge of the flywheel 4 is increased, and the rotation of the flywheel 4 is increasedWhen the flywheel energy storage system is switched from a charging mode to a power supply mode, the flywheel energy storage system has larger rotational inertia of the flywheel 4 under the action of the first auxiliary energy storage mechanisms, so that the rotating speed of the flywheel 4 cannot be weakened due to mode switching, and further the rotating speed of the flywheel 4 is maintained when the flywheel energy storage system releases energy; the plurality of first springs 53 and second springs 54 in the further first auxiliary energy storage mechanism also have an energy storage function, so that the energy storage of the flywheel energy storage system is increased; the invention can greatly improve the charging and discharging power of flywheel energy storage, and effectively improve the energy conversion and output;
the rotation of the rotating shaft drives the plurality of rotating discs 61 to rotate, and further drives the pistons 641 of the plurality of air cylinders 64 to reciprocate, when the pistons 641 of the air cylinders 64 move towards the direction close to the inside of the air cylinders 64, the air inside the air cylinders 64 can be compressed, the compressed air can generate thrust to the pistons 641, the pistons 641 are promoted to move towards the direction far away from the inside of the air cylinders 64, and further the thrust is converted into the rotating force of the rotating discs 61, and finally the flywheel 4 is driven to rotate, namely the second auxiliary energy storage mechanism always keeps reciprocating after the rotating shaft starts to rotate; when the flywheel energy storage system is switched from a charging mode to a discharging mode, the piston 641 of the cylinder 64 always keeps reciprocating motion under the action of gas compression and expansion, so that the continuous rotation of the flywheel 4 can be kept, the flywheel energy storage system can be discharged continuously, a driving motor of a ship can be charged continuously, and the stability of the working performance of the driving motor can be ensured;
in another technical scheme, the flywheel energy storage system suitable for the dredging ship comprises a shell 1 and an outer shell 1, wherein the inner shell 1 and the outer shell 1 are sleeved with each other, a hollow interlayer space 11 is formed between the inner shell 1 and the outer shell 1, the top of the inner shell is provided with a refrigerant inlet, and the bottom of the inner shell is provided with a refrigerant outlet; the flywheel energy storage system suitable for a dredging vessel further comprises a cooling mechanism comprising:
a plurality of cooling pipes 71 which are arranged at intervals along the axial direction of the rotating shaft, any cooling pipe 71 is wound on the stator of the motor/generator, and both ends of the cooling pipe 71 are communicated with the interlayer space 11;
the refrigerant agent storage tank 72 is arranged above the housing 1, the refrigerant agent storage tank 72 is communicated with an inlet of the refrigerant agent through a first pipe 73, and is communicated with an outlet of the refrigerant agent through a second pipe 74, the first pipe 73 is provided with a first valve 731, and the second pipe 74 is provided with a second valve 742, a pump 741 and a radiator 744.
In the technical scheme, in the long-term operation process of the flywheel energy storage system, under the condition of current concentrated discharge, the heat productivity of the motor/generator stator 31 is larger, if the heat cannot be dissipated in time, the overhigh temperature can damage the motor/generator stator 31 and the motor/generator rotor 32, so that the whole equipment is damaged, and further, the invention also provides a heat dissipation mechanism for solving the technical problems, the heat productivity of the motor/generator stator 31 and the heat inside the shell 1 can be dissipated in time, the normal operation of the flywheel energy storage system is ensured, the service lives of the motor/generator stator 31 and the motor/generator rotor 32 are prolonged, and the heat dissipation in time has the function of reducing the heat energy consumption; in the invention, refrigerant is introduced into the interlayer space 11 and the cooling pipe 71 of the shell 1, and circularly flows back into the storage tank 72 through the pump body 741, the flowing refrigerant can take out heat generated by the motor/generator stator 31 and heat in the shell 1, and releases the heat through the radiator 744, and simultaneously can dissipate heat of a bearing mechanism between the upper end of the rotating shaft and the top surface of the shell 1 and a rotary sealing mechanism between the lower end of the rotating shaft and the bottom surface of the shell 1, so that the bearing at the rotating part can be timely dissipated, the normal operation of the bearing is ensured, and the normal operation of the whole equipment is further ensured.
In another technical solution, in the flywheel energy storage system suitable for a dredging vessel, an annular first permanent magnet 81 is disposed at the bottom of the flywheel 4, and is fixedly sleeved on the rotating shaft, an annular second permanent magnet 82 is fixedly disposed on the inner wall of the bottom surface of the casing 1, and is opposite to the first permanent magnet 81, and the second permanent magnet 82 and the first permanent magnet 81 repel each other magnetically. The first permanent magnet and the second permanent magnet form a permanent magnet bearing, and can bear the weight of a part of rotating shaft, the rotor, the stator and the flywheel 4, so that the friction force in the rotating process is reduced, and the purpose of reducing energy consumption is finally achieved.
In another technical scheme, lubricating oil is smeared in any sliding chute and on the outer surface of any ball of the flywheel energy storage system suitable for the dredging ship. The friction force of the metal ring 52 sliding on the cross bar 51 is reduced, and the purpose of reducing energy consumption is achieved.
In another embodiment of the flywheel energy storage system for a dredging vessel, a filtering mechanism 745 is further disposed at an end of the second pipe 74 close to the coolant storage tank 72. The filtering mechanism 745 filters the refrigerant agent to be returned to the storage tank 72, so as to prevent the refrigerant agent from entering the storage tank 72 with impurities in the circulation process.
In another technical solution, the flywheel energy storage system suitable for a dredging vessel further comprises a vacuum pump 9 located at a lower portion of the housing 1, and a suction pipe of the vacuum pump 9 is communicated with the interior of the housing 1. The vacuum pump 9 is used for adjusting the vacuum degree in the shell 1 and preventing the gas in the shell 1 from generating resistance to the rotation of the rotating shaft and the flywheel 4.
The number of apparatuses and the scale of the process described herein are intended to simplify the description of the present invention. Applications, modifications and variations of the present invention will be apparent to those skilled in the art.
While embodiments of the invention have been described above, it is not limited to the applications set forth in the description and the embodiments, which are fully applicable in various fields of endeavor to which the invention pertains, and further modifications may readily be made by those skilled in the art, it being understood that the invention is not limited to the details shown and described herein without departing from the general concept defined by the appended claims and their equivalents.
Claims (5)
1. Flywheel energy storage system suitable for a dredging vessel, characterized in that it comprises:
the shell is of a closed cylindrical structure with a hollow interior;
the rotating shaft is coaxially arranged inside the shell, the upper end of the rotating shaft is rotatably connected with the inner wall of the top surface of the shell, the lower end of the rotating shaft is rotatably connected with the inner wall of the bottom surface of the shell through a dynamic sealing mechanism, and the bottom of the rotating shaft penetrates out of the bottom surface of the shell;
the motor/generator stator is sleeved on the upper part of the rotating shaft and is not contacted with the rotating shaft, and the motor/generator stator is fixedly connected with the inner wall of the shell;
a motor/generator rotor fixedly secured to the shaft and located inside the motor/generator stator;
the flywheel is of a hollow circular cylinder structure and is positioned below the motor/generator rotor, the outer wall of the inner ring of the flywheel is fixedly sleeved on the rotating shaft, and the outer wall of the outer ring of the flywheel is not in contact with the inner wall of the shell;
a plurality of first auxiliary energy storage mechanisms located inside the flywheel; any first auxiliary energy storage mechanism includes:
the two ends of the cross rod are respectively and fixedly connected with the inner wall of the inner ring of the flywheel and the inner wall of the outer ring of the flywheel, and the axis of the cross rod is intersected with the axis of the rotating shaft; the top of the cross bar is provided with a sliding chute extending along the length direction of the cross bar;
the metal rings are uniformly arranged at intervals along the axis direction of the cross rod, any metal ring is sleeved on the cross rod in a sliding manner, balls are fixedly arranged on the inner walls of the metal rings and are clamped in the sliding grooves in a sliding manner, any two adjacent metal rings are connected through a first spring, and one metal ring closest to the outer ring of the flywheel is connected with the inner wall of the outer ring of the flywheel through a second spring; any one of the first spring and the second spring is a compression spring;
when all the first springs and all the second springs are in a natural extension state, the mass distribution of the flywheel is uniform;
a second auxiliary energy storage mechanism located below the housing, the second auxiliary energy storage mechanism comprising:
the rotating shafts are arranged in the same direction, and the rotating shafts are arranged in the same direction;
the upper end and the lower end of each connecting block are fixedly connected with the corresponding two turntables respectively, and the two connecting blocks which are adjacent up and down are positioned on two sides of the rotating shaft respectively;
the device comprises a plurality of cylinders, a connecting block and a pressure gauge, wherein one cylinder is correspondingly arranged on one connecting block, nitrogen is filled in any cylinder, and the cylinder is provided with an air tap and the pressure gauge;
one end of any crank is pivoted with the corresponding connecting block, and the other end of the crank is connected with a piston rod of the corresponding cylinder;
the shell comprises an inner shell and an outer shell which are sleeved inside and outside, a hollow interlayer space is formed between the inner shell and the outer shell, the top of the inner shell is provided with a refrigerant inlet, and the bottom of the inner shell is provided with a refrigerant outlet; the flywheel energy storage system suitable for a dredging vessel further comprises a cooling mechanism comprising:
a plurality of cooling pipes which are arranged at intervals along the axial direction of the rotating shaft, any cooling pipe is wound on the stator of the motor/generator, and two ends of each cooling pipe are communicated with the interlayer space;
the refrigerant agent storage tank is arranged above the shell and is communicated with an inlet of the refrigerant agent through a first pipe body and communicated with an outlet of the refrigerant agent through a second pipe body, the first pipe body is provided with a first valve, and the second pipe body is provided with a second valve, a pump body and a radiator.
2. The flywheel energy storage system suitable for the dredging vessel as claimed in claim 1, wherein the bottom of the flywheel is provided with a first permanent magnet in a ring shape, which is fixedly sleeved on the rotating shaft, and the inner wall of the bottom surface of the casing is fixedly provided with a second permanent magnet in a ring shape, which is arranged opposite to the first permanent magnet, and the second permanent magnet is magnetically repulsive to the first permanent magnet.
3. The flywheel energy storage system for a dredging vessel according to claim 2, wherein the lubricating oil is applied to the inside of any one of the chutes and the outer surface of any one of the balls.
4. The flywheel energy storage system for a dredging vessel according to claim 3, wherein the end of the second pipe body near the coolant storage tank is further provided with a filtering mechanism.
5. The flywheel energy storage system for a dredging vessel according to claim 4, further comprising a vacuum pump located at a lower portion of the housing, the suction pipe of the vacuum pump communicating with the interior of the housing.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911234337.8A CN110994880B (en) | 2019-12-05 | 2019-12-05 | Flywheel energy storage system suitable for dredging ship |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911234337.8A CN110994880B (en) | 2019-12-05 | 2019-12-05 | Flywheel energy storage system suitable for dredging ship |
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| CN110994880B true CN110994880B (en) | 2020-10-23 |
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| GB9107451D0 (en) * | 1991-04-09 | 1991-05-22 | Yang Tai Her | The principle and structure of actively driving or centrifugal linear following dynamic flywheel effect |
| NL9401710A (en) * | 1994-10-17 | 1996-06-03 | Ccm Beheer Bv | System for cooling the rotor of an electric machine |
| US7750518B1 (en) * | 2006-11-29 | 2010-07-06 | Active Power, Inc. | Transient energy systems and methods for use of the same |
| JP6375152B2 (en) * | 2013-06-13 | 2018-08-15 | 株式会社エコ・アール | Aluminum titanate-based sintered body and method for producing the same |
| CN106089426A (en) * | 2016-08-01 | 2016-11-09 | 裘根富 | A kind of horizontally-opposed piston linear electromotor, electromotor |
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