CN111064309A - Magnetic suspension flywheel energy storage device - Google Patents
Magnetic suspension flywheel energy storage device Download PDFInfo
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- CN111064309A CN111064309A CN201911411964.4A CN201911411964A CN111064309A CN 111064309 A CN111064309 A CN 111064309A CN 201911411964 A CN201911411964 A CN 201911411964A CN 111064309 A CN111064309 A CN 111064309A
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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
- 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
- H02K7/003—Couplings; Details of shafts
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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
- H02K7/08—Structural association with bearings
- H02K7/083—Structural association with bearings radially supporting the rotary shaft at both ends of the rotor
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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
- H02K7/08—Structural association with bearings
- H02K7/09—Structural association with bearings with magnetic bearings
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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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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Magnetic Bearings And Hydrostatic Bearings (AREA)
Abstract
The application belongs to the technical field of magnetic suspension energy storage equipment, especially, relates to a magnetic suspension flywheel energy memory, and magnetic suspension flywheel energy memory includes: a housing; a flywheel rotor; magnetic bearings and the stator and rotor of the motor; the upper protection assembly comprises an upper protection bearing and an upper conical part, and the inner surface of the upper conical part is provided with a cylindrical surface and a conical surface; the lower protection assembly comprises a lower protection bearing and a lower conical piece, and the inner surface of the lower conical piece is provided with a cylindrical surface and a conical surface; the driver is electrically connected with a power supply structure of the magnetic suspension flywheel energy storage device; when the power is cut off or the flywheel rotor is out of control, the driver drives the upper conical part to move to the second position, and the conical surfaces at the two ends of the mandrel are respectively contacted and abutted with the conical surfaces of the upper conical part and the lower conical part. Under the condition of power failure or out-of-control flywheel rotor, the driver drives the upper conical part to move from the first position to the second position, and the conical surfaces of the upper conical part and the lower conical part are respectively contacted and abutted with the conical surfaces at the two ends of the mandrel, so that the flywheel rotor is re-centered without eccentric rotation.
Description
Technical Field
The application belongs to the technical field of magnetic suspension energy storage equipment, and particularly relates to a magnetic suspension flywheel energy storage device.
Background
The magnetic suspension flywheel energy storage system is a device for storing electric energy as kinetic energy and generating electric energy from the stored kinetic energy. The magnetic suspension flywheel energy storage system has wide application range, can be applied to a mobile platform in the fields of automobiles and spaceflight, and can also be applied to a fixed platform for storing electric quantity of a UPS solar energy and wind power generation system.
In a magnetic levitation energy storage system, a gap exists between the rotor and the protective bearing. During the operation of the magnetic suspension bearing, the rotor always rotates at high speed in the gap. If the rotor can rotate centrally all the time, the magnetic bearing can reduce the loss and vibration to the minimum, but if serious flywheel eccentricity or power source interruption occurs, the magnetic suspension bearing can not keep the suspension state and can fail suddenly, the flywheel rotor collides with the protection bearing, and the system parts are possibly damaged. In order to reduce the damage of system components caused by faults to the maximum extent, a rolling bearing is required to be placed along the axis direction of a flywheel rotor to serve as a protective bearing, so that when the flywheel is unstable, the rotor rotates on the protective bearing, and important components of the system are guaranteed not to be damaged.
In the event of a failure of the magnetic bearing, the rotor can fall onto the protective bearing and produce a gyroscopic moment and a very high, unevenly distributed rotational moment thereon. These two moments not only shorten the life of the protective bearing, but also produce additional stress on the rotor, resulting in damage and fracture of the rotor. Conventional protective bearings, while helpful in emergency situations, do not prevent uneven rotational and gyroscopic moments from occurring. The traditional protective bearing can not fix the rotor at the central position when the magnetic suspension energy storage system does not work, and the rotor obliquely depends on the protective bearing. During long-distance transportation, the rotor and the protective bearing are easily damaged due to shaking.
Disclosure of Invention
The application aims to provide a magnetic suspension flywheel energy storage device, and aims to solve the technical problem that when a flywheel in the prior art breaks down or fails, the service life of a protective bearing is shortened due to the fact that the rotary torque distributed unevenly is generated, and the rotor is damaged and broken.
In order to achieve the purpose, the technical scheme adopted by the application is as follows: a magnetically levitated flywheel energy storage device comprising:
a housing;
the flywheel rotor is accommodated in the shell and comprises a core shaft and a flywheel arranged on the core shaft;
the magnetic bearing is sleeved outside the mandrel, the stator of the motor is fixed with the shell, the rotor of the motor is fixed with the mandrel, and the upper end and the lower end of the mandrel are respectively provided with a conical surface;
the upper protection assembly is connected with the shell and comprises an upper protection bearing and an upper conical piece connected to the inner ring of the upper protection bearing, the upper conical piece is sleeved at the upper end of the mandrel, and the inner surface of the upper conical piece is provided with a cylindrical surface and a conical surface which are connected;
the lower protection assembly is connected with the shell and comprises a lower protection bearing and a lower conical piece connected to the inner ring of the lower protection bearing, the lower conical piece is sleeved at the lower end of the mandrel, and the inner surface of the lower conical piece is provided with a cylindrical surface and a conical surface which are connected;
the driver is connected with the shell and is electrically connected with a power supply structure of the magnetic suspension flywheel energy storage device;
the driver can drive the upper conical part to reciprocate between a first position and a second position, when the magnetic suspension flywheel energy storage device works normally, the upper protection assembly is located at the first position, and the upper end and the lower end of the mandrel are obliquely abutted to cylindrical surfaces of the upper conical part and the lower conical part respectively; when the magnetic suspension flywheel energy storage device is powered off or the flywheel rotor is out of control, the driver drives the upper conical part to move downwards from the first position to the second position, and the conical surfaces at the two ends of the mandrel are respectively in contact with and abut against the conical surfaces of the upper conical part and the lower conical part.
Furthermore, a displacement sensor in communication connection with the driver is arranged in the shell, the displacement sensor is used for detecting the axial and radial offset states of the mandrel and sending detection information to the driver, and the driver drives the upper conical part to move to the second position when the displacement sensor detects that the axial and/or radial offset of the mandrel exceeds a preset value.
Further, the driver comprises a magnetic yoke assembly and an elastic piece, wherein the magnetic yoke assembly is electrically connected with a power supply structure of the magnetic suspension flywheel energy storage device; when electrified, the magnetic yoke assembly compresses the elastic element, and the upper conical element is located at the first position; when the power is off or the flywheel rotor is out of control, the elastic piece pushes the upper conical piece to enable the upper conical piece to move from the first position to the second position.
Further, the elastic piece is a spring, an elastic sheet, a flexible buffer layer or a piston.
Furthermore, the magnetic yoke assembly comprises an upper magnetic pole plate and a lower magnetic pole plate, an accommodating cavity is enclosed between the upper magnetic pole plate and the lower magnetic pole plate, and a coil is arranged in the accommodating cavity; when the power is on, the elastic piece is compressed between the upper magnetic pole plate and the lower magnetic pole plate, and the upper conical piece is located at the first position; when the power is off or the flywheel rotor is out of control, the elastic piece pushes the lower magnetic pole plate, and then the upper conical piece moves to the second position.
The upper protection assembly further comprises an upper support and an axial displacement slider, the upper support and the axial displacement slider are coaxially arranged with the mandrel, the axial displacement slider is fixedly sleeved outside the upper protection bearing, the upper support is connected with the shell, a groove for accommodating the upper protection bearing, the upper conical part and the axial displacement slider is formed in the upper support, and when the elastic part pushes the lower magnetic pole plate, the lower magnetic pole plate pushes the axial displacement slider to move downwards in the groove along the axial direction, so that the upper protection bearing and the upper conical part are driven to move downwards.
Furthermore, an upper protective sleeve is sleeved at the upper end of the mandrel, a cylindrical surface and a conical surface which are respectively matched with the cylindrical surface and the conical surface of the upper conical part are formed on the outer surface of the upper protective sleeve, a lower protective sleeve is sleeved at the lower end of the mandrel, and a cylindrical surface and a conical surface which are respectively matched with the cylindrical surface and the conical surface of the lower conical part are formed on the outer surface of the lower protective sleeve; when the upper conical part moves to the second position, a gap is formed between the cylindrical surface of the upper conical part and the cylindrical surface of the upper protective sleeve, and a gap is formed between the cylindrical surface of the lower conical part and the cylindrical surface of the lower protective sleeve.
Furthermore, the outer surface of the upper conical part is in interference fit with the inner ring of the upper protection bearing, a conical surface gradually widening downwards is formed at the bottom end of the inner surface of the upper conical part, the upper protection sleeve is in interference fit with the mandrel, a conical surface gradually widening downwards is formed at the bottom end of the outer surface of the upper protection sleeve, a convex shoulder extending outwards is arranged at the bottom end of the upper conical part, and the lower end face of the inner ring of the upper protection bearing abuts against the upper end face of the convex shoulder.
Furthermore, the inner surface of the lower protective sleeve is in interference fit with the mandrel, the upper end of the lower protective sleeve extends outwards to form a convex shoulder, a cylindrical surface is formed on the outer surface of the lower protective sleeve close to the bottom end, and a conical surface is formed between the outer surface of the lower protective sleeve and the lower surface of the convex shoulder; the outer surface of the lower conical part is in interference fit with the inner ring of the lower protection bearing, a cylindrical surface is formed on the inner surface of the lower conical part, an upward gradually-widening conical surface is formed at the top end of the inner surface of the lower conical part, a blocking shoulder extending outwards is formed at the top end of the lower conical part, the lower end face of the blocking shoulder abuts against the upper end face of the inner ring of the lower protection bearing, and a gap is formed between the blocking shoulder and the shoulder of the lower protection sleeve.
Furthermore, the magnetic suspension flywheel energy storage device also comprises a shaft diameter integrated magnetic bearing sleeved at the upper end of the mandrel and a radial magnetic bearing sleeved at the lower end of the mandrel.
The beneficial effect of this application: the magnetic suspension flywheel energy storage device is provided with an upper protection assembly, a lower protection assembly and a driver, and when the magnetic suspension flywheel energy storage device is electrified and works normally, a flywheel rotor can rotate around a geometric central shaft of the device all the time; under the condition of power failure or out-of-control of the flywheel rotor, the driver drives the upper conical part to move from the first position to the second position, and the conical surfaces of the upper conical part and the lower conical part are respectively contacted and abutted with the conical surfaces at the two ends of the core shaft, so that the core shaft is locked, the flywheel rotor is re-centered without eccentric rotation, uneven rotation torque and gyro torque are prevented from being generated between the core shaft of the flywheel rotor and the protection bearing, the collision damage of parts is reduced, and the service life of the upper and lower end protection bearings is prolonged; meanwhile, the magnetic suspension flywheel energy storage device can be suitable for long-distance transportation, and the flywheel rotor cannot shake in the shell.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
Fig. 1 is a schematic perspective view of a magnetic suspension flywheel energy storage device provided in an embodiment of the present application;
FIG. 2 is a longitudinal cross-sectional view of the magnetically levitated flywheel energy storage device shown in FIG. 1;
FIG. 3 is a longitudinal cross-sectional view of the magnetically levitated flywheel energy storage device of FIG. 1 removed from the housing;
FIG. 4 is a longitudinal sectional view of the magnetic levitation flywheel energy storage device shown in FIG. 2, which is assembled on an upper end part of a mandrel;
FIG. 5 is a longitudinal sectional view of the magnetic levitation flywheel energy storage device shown in FIG. 2, assembled on the lower end part of the mandrel;
FIG. 6 is an exploded view of the magnetic levitation flywheel energy storage device shown in FIG. 1;
fig. 7 is an exploded view of the driver in the magnetic levitation flywheel energy storage device shown in fig. 2.
Wherein, in the figures, the respective reference numerals:
100-a housing; 200-flywheel rotor; 310-shaft diameter integrated magnetic bearing; 320-radial magnetic bearing; 400-motor; 410-a stator; 420-a rotor; 500-upper protection component; 600-lower protection component; 700-a driver; 800-a displacement sensor; 810-upper displacement sensor; 820-lower displacement sensor; 110-a mesochite; 120-a bearing seat; 130-a base; 140-a fixed seat; 210-a mandrel; 220-a flywheel; 230-upper protective sleeve; 231-a conical surface; 240-lower protective sleeve; 250-upper end cap; 241-a conical surface; 510-upper protection bearings; 520-an upper cone; 530-axial displacement slide; 540-upper support; 541-a groove; 610-lower protective bearing; 620-lower cone; 630-a lower end cap; 710-upper pole plate; 711-ring groove; 720-lower pole plate; 730-a coil; 740-an elastic member; 741-a wave spring; 750-a gasket; 760-pole plate holder.
Detailed Description
Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present application and should not be construed as limiting the present application.
In the description of the present application, it is to be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, as used herein, refer to an orientation or positional relationship indicated in the drawings, which is for convenience and simplicity of description, and does not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus, is not to be considered as limiting.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.
In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
As shown in fig. 1 to 3, the magnetic suspension flywheel energy storage device provided by the embodiment of the present application includes a housing 100, a flywheel rotor 200, a magnetic bearing 300, a stator 410 and a rotor 420 of a motor 400, an upper protection assembly 500, a lower protection assembly 600, and a driver 700. The flywheel rotor 200 includes a spindle 210 and a flywheel 220 fixed to the spindle 210; the magnetic bearings, the stator 410 and the rotor 420 of the motor 400, the flywheel 220, the spindle 210, the upper protection assembly 500, the lower protection assembly 600, and the driver 700 are coaxially arranged. The magnetic bearing 300 is sleeved outside the spindle 210, the stator 410 of the motor 400 is fixed to the housing 100, the rotor 420 of the motor 400 is fixed to the spindle 210, and the upper and lower ends of the spindle 210 have tapered surfaces respectively, which may be integrally formed on the outer surface of the spindle 210 or formed by a protection member sleeved on the spindle 210. The upper protection assembly 500 comprises an upper protection bearing 510 and an upper conical part 520 connected to the inner ring of the upper protection bearing 510, the upper conical part 520 is sleeved at the upper end of the mandrel 210, and the upper conical part 520 is provided with a cylindrical surface and a conical surface which are connected; the lower protection assembly 600 is fixed to the housing 100, the lower protection assembly 600 includes a lower protection bearing 610 and a lower conical member 620 connected to an inner ring of the lower protection bearing 610, the lower conical member 620 is sleeved on a lower end of the mandrel 210, and the lower conical member 620 has a cylindrical surface and a conical surface which are connected to each other.
The driver 700 is connected with the shell 100, the driver 700 is electrically connected with the power supply structure of the magnetic suspension flywheel energy storage device, and the driver 700 and the power supply structure of the magnetic suspension flywheel energy storage device are commonly used by a set of power supply system. Driver 700 is capable of driving upper cone 520 to reciprocate between a first position and a second position.
With reference to fig. 2, 4 and 5, when the magnetic levitation flywheel energy storage device is powered on and works normally, the upper conical part 520 is located at the first position, the upper conical part 520 is located at the non-working position, the upper end of the spindle 210 leans against the cylindrical surface of the upper conical part 520 in an inclined manner, the lower end of the spindle 210 leans against the cylindrical surface of the lower conical part 620 in an inclined manner, and the conical surfaces of the upper conical part 520 and the lower conical part 620 have a gap with the conical surface of the spindle 210. When the magnetic suspension flywheel energy storage device is ready to suspend, the driver 700 is powered on to drive the upper conical part 520 to move to the non-working position, the upper protection component 600 and the lower protection component 600 are separated from the flywheel rotor 200, and the magnetic suspension flywheel energy storage device can be calibrated, suspended and accelerated at the normal position.
When the power is off, the driver 700 drives the upper conical part 520 to move from the first position to the second position, the upper conical part 520 is located at the working position, at the moment, the conical surface of the upper conical part 520 is in contact with the conical surface matched with the upper end of the mandrel 210, the conical surface of the lower conical part 620 is in contact with the conical surface matched with the lower end of the mandrel 210, the mandrel 210 is stably kept on the geometric rotating shaft of the whole device, the magnetic suspension flywheel energy storage device can be suitable for long-distance transportation, and the flywheel rotor 200 cannot shake in the shell 100.
That is, when the magnetic levitation flywheel energy storage device experiences a large excursion of the flywheel rotor 200, a failure of the magnetic bearing 300 occurs, and the system is suddenly powered down, the upper conical member 520 is rapidly moved to the second position by the driver 700, the spindle 210 is in contact with the upper and lower conical members 620, the spindle 210 can be re-centered, rotated on the geometric rotation axis of the entire device, and can be rotated until stationary. The flywheel rotor 200 rotates on the geometric rotation axis of the whole device, the spindle 210 of the flywheel rotor 200 can be prevented from shaking and impacting repeatedly in the upper and lower protective bearings 610, uneven rotation moment and gyro moment generated on the protective bearings are prevented, collision damage of parts is reduced, and the service life of the protective bearings is prolonged.
The magnetic suspension flywheel energy storage device provided by the embodiment is provided with the upper protection assembly 500, the lower protection assembly 600 and the driver 700, and when the device is electrified and works normally, the flywheel rotor 200 can rotate around the geometric central shaft of the device all the time; under the condition of power failure or runaway of the flywheel rotor 200, the driver 700 drives the upper conical part 520 to move from the first position to the second position, the conical surfaces of the upper conical part 520 and the lower conical part 620 are respectively contacted and abutted with the conical surfaces at the two ends of the mandrel 210, so that the mandrel 210 is locked, the flywheel rotor 200 is re-centered, eccentric rotation is not generated, uneven rotation torque and gyro torque are prevented from being generated between the mandrel 210 of the flywheel rotor 200 and a protection bearing, collision damage of parts is reduced, and the service life of the protection bearings at the upper end and the lower end is prolonged; meanwhile, the magnetic suspension flywheel energy storage device can be suitable for long-distance transportation, and the flywheel rotor 200 cannot shake in the shell 100.
As shown in fig. 1, 2 and 6, the outer shell 100 includes a middle shell 110, a bearing seat 120 and a base 130, which are coaxially arranged, the middle shell 110 is hollow and integrally annular, and has openings at upper and lower ends, the flywheel 220 is arranged approximately corresponding to the center of the middle shell 110, the bearing seat 120 is connected to the upper end of the middle shell 110, and the base 130 is connected to the lower end of the middle shell 110. The bottom surface of the base 130 is connected with a fixed seat 140 through a fastener, the base 130 is provided with a plurality of circular sector holes, the top surface of the fixed seat 140 is convexly provided with adaptive sector blocks corresponding to the positions of the sector holes, and the sector blocks are adaptive to be clamped into the sector holes. The area of the cross section of the fixing seat 140 is larger than that of the cross section of the base 130, and the fixing seat 140 is provided with a mounting hole so as to mount the magnetic suspension flywheel energy storage device on external equipment through a connecting piece.
In an embodiment, a displacement sensor 800 is disposed in the housing 100 and is in communication with the driver 700, the displacement sensor 800 is configured to detect the axial and radial offset of the mandrel 210 and send detection information to the driver 700, and the driver 700 drives the upper conical member 520 to move to the second position when the displacement sensor 800 detects that the axial and/or radial offset of the mandrel 210 exceeds a preset value. Thus, when the magnetic suspension flywheel energy storage device has the situation that the flywheel rotor 200 deviates greatly, or the magnetic bearing is about to fail and the system is suddenly powered off, the displacement sensor 800 sends detection information to the driver 700, at the moment, the driver 700 drives the upper conical part 520 to move axially downwards to the second position, the upper protection bearing 510 moves along with the upper conical part 520, the conical surfaces at the upper end and the lower end lock the mandrel 210, the mandrel 210 is re-centered and rotates on the geometric rotation shaft of the whole device, and the situation that the mandrel 210 repeatedly impacts the protection bearings at the two ends is avoided.
In one embodiment, as shown in fig. 2 and 3, two displacement sensors 800 are provided, including an upper displacement sensor 810 and a lower displacement sensor 820, the upper displacement sensor 810 is fixed to the bearing housing 120, and the lower displacement sensor 820 is fixed to the base 130, so that the displacement of the mandrel 210 can be detected more accurately by simultaneous detection of the upper and lower displacement sensors, thereby improving the reliability of the operation of the apparatus. One end of the stator 410 of the motor 400 is connected with the lower displacement sensor 820 through an adapter to realize relative fixation with the housing 100, the rotor 420 of the motor 400 is fixed on the bottom surface of the flywheel 220, the rotor 420 comprises an inner rotor core and an outer rotor core, the stator 410 is inserted between the inner rotor core and the outer rotor core, and a magnetic gap is formed between the stator 410 and the inner rotor core and the outer rotor core.
In one embodiment, the driver 700 includes a magnetic yoke assembly electrically connected to the power supply structure of the magnetic suspension flywheel energy storage device, when the power is off, the elastic member 740 extends, the elastic member 740 abuts against the upper protection assembly 500, at this time, the tapered surface of the upper tapered member 520 abuts against the tapered surface of the upper end of the core shaft 210, the tapered surface of the lower tapered member 620 abuts against the tapered surface of the lower end of the core shaft 210, the flywheel rotor 200 is fixed relative to the housing 100, and the flywheel rotor 200 does not shake.
In one embodiment, as shown in fig. 4 and 7, the yoke assembly includes an upper magnetic plate 710 and a lower magnetic plate 720, a receiving cavity is defined between the upper magnetic plate 710 and the lower magnetic plate 720, a coil 730 is disposed in the receiving cavity, when the coil 730 is energized, the two magnetic plates attract each other, the distance between the two magnetic plates is reduced, and the moving magnetic plate compresses the elastic member 740; when the coil 730 is powered off, the two magnetic pole plates are reset to the original positions, at this time, the elastic piece 740 abuts against the upper protection assembly 500, the upper conical positioning of the upper protection assembly 500 moves, and the conical surface of the upper conical positioning contacts with the conical surface at the upper end of the mandrel 210.
In one embodiment, as shown in fig. 4, 6 and 7, the bottom surface of the upper magnetic pole plate 710 is recessed to form an annular groove 711, and the lower magnetic pole plate 720 and the annular groove 711 enclose a receiving cavity adapted to receive the coil 730; annular positioning steps are respectively formed on the inner sides of the upper magnetic pole plate 710 and the lower magnetic pole plate 720, the elastic piece 740 adopts a plurality of layers of corrugated springs 741 which are laminated together, the outer diameter of each corrugated spring 741 is matched with the inner diameter of the upper magnetic pole plate 710, a gasket 750 is placed on the corrugated spring 741 which is positioned at the topmost part, the gasket 750 is abutted against the positioning steps on the inner side of the upper magnetic pole plate 710, and the plurality of layers of corrugated springs 741 are positioned between the upper magnetic pole plate 710 and the lower magnetic pole plate 720.
In one embodiment, the elastic member 740 is a spring, a spring plate, a flexible buffer layer or a piston, and it is understood that the elastic member 740 may be other power devices with a fast response feature. In one embodiment, the elastic member 740 is a wave spring 741 formed by winding a plurality of turns, and the wave spring 741 is an elastic element having a plurality of peaks and valleys on a thin metal ring, and is suitable for applications where the load and the deformation are not large and are limited by a small installation space; as shown in fig. 4 and 7, the elastic member 740 may further include a plurality of wave springs 741 laminated together, and the wave spring 741 at the top is provided with a spacer 750 adapted to an inner positioning step of the upper magnetic pole plate 710.
In one embodiment, as shown in fig. 2 and 4, the upper protection assembly 500 further includes an upper support 540 coaxially arranged with the mandrel 210 and an axial displacement slider 530, and the axial displacement slider 530 is fixedly sleeved on the upper protection bearing 510. The upper support 540 is connected with the housing 100, and particularly, the upper support 540 is connected and fixed with the bearing seat 120 of the housing 100; a groove 541 is formed in the upper support 540 to receive the upper protection bearing 510, the upper cone 520, and the axial displacement slider 530. When the elastic member 740 pushes the lower magnetic pole plate 720, the lower magnetic pole plate 720 pushes the axial displacement slider 530 to move downward in the axial direction in the groove 541, and further drives the upper protection bearing 510 and the upper conical member 520 to move downward.
As shown in fig. 1, 3 and 4, the driver 700 further includes a magnetic pole plate base 760, the periphery of the lower end of the magnetic pole plate base 760 is fixedly connected to the upper support 540, and the bottom of the magnetic pole plate base 760 is provided with a receiving groove for receiving the upper magnetic pole plate 710 and the lower magnetic pole plate 720.
In one embodiment, as shown in fig. 3 and 4, the upper end of the mandrel 210 is sleeved with an upper protective sleeve 230, the outer surface of the upper protective sleeve 230 is formed with a cylindrical surface and a conical surface respectively matching with the cylindrical surface and the conical surface of the upper conical member 520, and a gap is formed between the cylindrical surface of the upper conical member 520 and the cylindrical surface of the upper protective sleeve 230. The top end of the upper protection sleeve 230 may be provided with an upper end cap 250, and the upper end cap 250 closes the opening at the top of the upper protection sleeve 230, so as to cover the exposed surface of the top end of the mandrel 210 and prevent the external dust or foreign matters from entering.
As shown in fig. 3 and 5, the lower end of the mandrel 210 is sleeved with a lower protective sleeve 240, a cylindrical surface and a conical surface which are respectively matched with the cylindrical surface and the conical surface of the lower conical member 620 are formed outside the lower protective sleeve 240, and a gap is formed between the cylindrical surface of the lower conical member 620 and the cylindrical surface of the lower protective sleeve 240. The lower protection assembly 600 may further include a lower end cover 630, the lower end cover 630 is provided with a via hole for the lower end of the mandrel 210 to pass through, and the lower end cover 630 is fixedly connected to the bottom surface of the base 130; the base 130 is provided with a through hole for the lower protective sleeve 240 to pass through, and the outer ring of the lower protective bearing 610 is in interference fit with the through hole wall of the base 130.
Specifically, as shown in fig. 4, the outer surface of the upper conical member 520 is in interference fit with the inner ring of the upper protection bearing 510, a tapered surface 231 which is gradually widened downward is formed at the bottom end of the outer surface of the upper protection sleeve 230, the length of the cylindrical surface of the inner surface of the upper conical member 520 is smaller than that of the cylindrical surface of the outer surface of the upper protection sleeve 230, a tapered surface which is gradually widened downward is formed at the bottom end of the inner surface of the upper conical member 520, and the inclination angle of the tapered surface is matched with the tapered surface 231 at the bottom end of the outer surface of; the lower end of the upper conical member 520 has an outwardly extending shoulder by which the lower end surface of the inner race of the upper protection bearing 510 abuts against the upper end surface thereof; the upper protective sleeve 230 is in interference fit with the mandrel 210, a shaft shoulder is formed at the upper end of the mandrel 210, and the lower end face of the upper protective sleeve 230 abuts against the shaft shoulder and is positioned by means of the shaft shoulder; the axial displacement slider 530 is in interference fit with the outer ring of the upper protection bearing 510, the axial displacement slider 530 can drive the upper protection bearing 510 and the upper conical part 520 to move up and down in the upper support 540, the top end of the axial displacement slider 530 is provided with a retaining shoulder extending inwards, and the lower end face of the retaining shoulder is abutted against the upper end face of the outer ring of the upper protection bearing 510 and is positioned by means of the retaining shoulder.
As shown in fig. 5, the inner surface of the lower protection sleeve 240 is in interference fit with the mandrel 210, the upper end of the lower protection sleeve 240 extends outwards to form a shoulder, the outer surface of the lower protection sleeve 240 near the bottom end is formed with a cylindrical surface, and a tapered surface 241 is formed between the outer surface of the lower protection sleeve 240 and the lower surface of the shoulder; the outer surface of the lower conical part 620 is in interference fit with the inner ring of the lower protective bearing 610, the inner surface of the lower conical part 620 is formed with a cylindrical surface, the length of the cylindrical surface is smaller than that of the cylindrical surface of the outer wall surface of the lower protective sleeve 240, the top end of the inner surface of the lower conical part 620 forms an upward gradually widening conical surface, the inclination angle of the conical surface is matched with that of the conical surface 241 of the lower protective sleeve 240, the top end of the lower conical part 620 is formed with a shoulder extending outwards, the lower end surface of the shoulder abuts against the upper end surface of the inner ring of the lower protective bearing 610, a gap is formed between the shoulder and the shoulder of the lower protective sleeve 240, and the lower end surface of the outer ring of the lower protective bearing 610 abuts.
In one embodiment, the upper protective bearing 510 and the lower protective bearing 610 may each be an angular contact ball bearing, a deep groove ball bearing, or a cylindrical roller bearing. In one embodiment, as shown in fig. 3, the upper protection bearing 510 is an angular contact ball bearing, and the lower protection bearing 610 is a deep groove ball bearing.
In one embodiment, as shown in fig. 2 and 3, the magnetic bearing 300 includes a shaft-diameter integrated magnetic bearing 310 and a radial magnetic bearing 320, which are sleeved outside the spindle 210, the shaft-diameter integrated magnetic bearing 310 is close to the upper end of the spindle 210, an outer ring of the shaft-diameter integrated magnetic bearing 310 is fixed to the bearing seat 120, the radial magnetic bearing 320 is close to the lower end of the spindle 210, and the two magnetic bearings are arranged to enable the spindle 210 to be in a suspended state during operation.
The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims (10)
1. A magnetic suspension flywheel energy storage device is characterized in that: the method comprises the following steps:
a housing;
the flywheel rotor comprises a mandrel and a flywheel arranged on the mandrel;
the magnetic bearing is sleeved outside the mandrel, the stator of the motor is fixed with the shell, the rotor of the motor is fixed with the mandrel, and the upper end and the lower end of the mandrel are respectively provided with a conical surface;
the upper protection assembly is connected with the shell and comprises an upper protection bearing and an upper conical piece connected to the inner ring of the upper protection bearing, the upper conical piece is sleeved at the upper end of the mandrel, and the inner surface of the upper conical piece is provided with a cylindrical surface and a conical surface which are connected;
the lower protection assembly is connected with the shell and comprises a lower protection bearing and a lower conical piece connected to the inner ring of the lower protection bearing, the lower conical piece is sleeved at the lower end of the mandrel, and the inner surface of the lower conical piece is provided with a cylindrical surface and a conical surface which are connected;
the driver is connected with the shell and is electrically connected with a power supply structure of the magnetic suspension flywheel energy storage device;
the driver can drive the upper conical part to reciprocate between a first position and a second position, when the magnetic suspension flywheel energy storage device works normally, the upper protection assembly is located at the first position, and the upper end and the lower end of the mandrel are obliquely abutted to cylindrical surfaces of the upper conical part and the lower conical part respectively; when the magnetic suspension flywheel energy storage device is powered off or the flywheel rotor is out of control, the driver drives the upper conical part to move downwards from the first position to the second position, and the conical surfaces at the two ends of the mandrel are respectively in contact with and abut against the conical surfaces of the upper conical part and the lower conical part.
2. A magnetically suspended flywheel energy storage apparatus as claimed in claim 1, wherein: the shell is internally provided with a displacement sensor in communication connection with the driver, the displacement sensor is used for detecting the axial and radial offset states of the mandrel and sending detection information to the driver, and the driver drives the upper conical part to move to the second position when the displacement sensor detects that the axial and/or radial offset of the mandrel exceeds a preset value.
3. A magnetically suspended flywheel energy storage apparatus as claimed in claim 1, wherein: the driver comprises a magnetic yoke assembly and an elastic piece, and the magnetic yoke assembly is electrically connected with a power supply structure of the magnetic suspension flywheel energy storage device; when electrified, the magnetic yoke assembly compresses the elastic element, and the upper conical element is located at the first position; when the power is off or the flywheel rotor is out of control, the elastic piece pushes the upper conical piece to enable the upper conical piece to move from the first position to the second position.
4. A magnetically suspended flywheel energy storage apparatus as claimed in claim 3, wherein: the elastic piece is a spring, an elastic sheet, a flexible buffer layer or a piston.
5. A magnetically suspended flywheel energy storage apparatus as claimed in claim 3, wherein: the magnetic yoke assembly comprises an upper magnetic pole plate and a lower magnetic pole plate, an accommodating cavity is defined between the upper magnetic pole plate and the lower magnetic pole plate, and a coil is arranged in the accommodating cavity; when the power is on, the elastic piece is compressed between the upper magnetic pole plate and the lower magnetic pole plate, and the upper conical piece is located at the first position; when the power is off or the flywheel rotor is out of control, the elastic piece pushes the lower magnetic pole plate, and then the upper conical piece moves to the second position.
6. A magnetically suspended flywheel energy storage apparatus as claimed in claim 5, wherein: the upper protection assembly further comprises an upper support and an axial displacement sliding block, the upper support and the axial displacement sliding block are coaxially arranged with the mandrel, the axial displacement sliding block is fixedly sleeved outside the upper protection bearing, the upper support is connected with the shell, a groove for containing the upper protection bearing, the upper conical part and the axial displacement sliding block is formed in the upper support, when the elastic part pushes the lower magnetic pole plate, the lower magnetic pole plate pushes the axial displacement sliding block to move downwards in the groove along the axial direction, and then the upper protection bearing and the upper conical part are driven to move downwards.
7. A magnetic levitation flywheel energy storage device as claimed in any one of claims 1 to 6, wherein: an upper protective sleeve is sleeved at the upper end of the mandrel, a cylindrical surface and a conical surface which are respectively matched with the cylindrical surface and the conical surface of the upper conical part are formed on the outer surface of the upper protective sleeve, a lower protective sleeve is sleeved at the lower end of the mandrel, and a cylindrical surface and a conical surface which are respectively matched with the cylindrical surface and the conical surface of the lower conical part are formed on the outer surface of the lower protective sleeve; when the upper conical part moves to the second position, a gap is formed between the cylindrical surface of the upper conical part and the cylindrical surface of the upper protective sleeve, and a gap is formed between the cylindrical surface of the lower conical part and the cylindrical surface of the lower protective sleeve.
8. A magnetically suspended flywheel energy storage apparatus as claimed in claim 7, wherein: go up the surface of toper piece with go up the inner circle interference fit of protection bearing, the bottom of going up the toper piece internal surface is formed with the conical surface that gradually widens downwards, go up interference fit between protective sheath and the dabber, it is formed with the conical surface that gradually widens downwards to go up protective sheath surface bottom, it has the convex shoulder of outside extension to go up the toper piece bottom, the lower terminal surface that goes up the protection bearing inner circle supports and leans on the up end of this convex shoulder.
9. A magnetically suspended flywheel energy storage apparatus as claimed in claim 7, wherein: the inner surface of the lower protective sleeve is in interference fit with the mandrel, the upper end of the lower protective sleeve extends outwards to form a convex shoulder, a cylindrical surface is formed on the outer surface of the lower protective sleeve close to the bottom end, and a conical surface is formed between the outer surface of the lower protective sleeve and the lower surface of the convex shoulder; the outer surface of the lower conical part is in interference fit with the inner ring of the lower protection bearing, a cylindrical surface is formed on the inner surface of the lower conical part, an upward gradually-widening conical surface is formed at the top end of the inner surface of the lower conical part, a blocking shoulder extending outwards is formed at the top end of the lower conical part, the lower end face of the blocking shoulder abuts against the upper end face of the inner ring of the lower protection bearing, and a gap is formed between the blocking shoulder and the shoulder of the lower protection sleeve.
10. A magnetic levitation flywheel energy storage device as claimed in any one of claims 1 to 6, wherein: the magnetic suspension flywheel energy storage device also comprises a shaft diameter integrated magnetic bearing sleeved at the upper end of the mandrel and a radial magnetic bearing sleeved at the lower end of the mandrel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911411964.4A CN111064309A (en) | 2019-12-31 | 2019-12-31 | Magnetic suspension flywheel energy storage device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911411964.4A CN111064309A (en) | 2019-12-31 | 2019-12-31 | Magnetic suspension flywheel energy storage device |
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| CN111064309A true CN111064309A (en) | 2020-04-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911411964.4A Pending CN111064309A (en) | 2019-12-31 | 2019-12-31 | Magnetic suspension flywheel energy storage device |
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| CN (1) | CN111064309A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111541336A (en) * | 2020-07-08 | 2020-08-14 | 沈阳微控新能源技术有限公司 | Flywheel energy storage system |
| CN115811174A (en) * | 2023-02-10 | 2023-03-17 | 山东天瑞重工有限公司 | Magnetic suspension flywheel energy storage battery |
-
2019
- 2019-12-31 CN CN201911411964.4A patent/CN111064309A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111541336A (en) * | 2020-07-08 | 2020-08-14 | 沈阳微控新能源技术有限公司 | Flywheel energy storage system |
| CN115811174A (en) * | 2023-02-10 | 2023-03-17 | 山东天瑞重工有限公司 | Magnetic suspension flywheel energy storage battery |
| CN115811174B (en) * | 2023-02-10 | 2023-04-18 | 山东天瑞重工有限公司 | Magnetic suspension flywheel energy storage battery |
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Effective date of registration: 20220421 Address after: 518000 room 2601, block B, building 7, Shenzhen International Innovation Valley, Dashi 1st Road, Xili community, Xili street, Nanshan District, Shenzhen, Guangdong Applicant after: Candela (Shenzhen) New Energy Technology Co.,Ltd. Address before: 518000 3501, 35th floor, Shenzhen Bay venture capital building, 25 Haitian 2nd Road, Binhai community, Yuehai street, Nanshan District, Shenzhen City, Guangdong Province Applicant before: CANDELA (SHENZHEN) TECHNOLOGY INNOVATION Co.,Ltd. |
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