CN115333290A - Flywheel energy storage system - Google Patents

Abstract

The invention discloses a flywheel energy storage system which comprises a pit, a rotating part, a shell, an end cover, a plurality of locking parts and an auxiliary assembly, wherein a vacuum cavity is formed in the shell, the rotating part is rotatably assembled in the vacuum cavity, the shell is arranged in the pit, and one end of the shell is connected with the bottom end of the pit; the end cover is arranged at the pit opening of the pit, at least part of the end cover is arranged between the other end of the shell and the inner wall of the pit, and the end cover surrounds the outer peripheral side of the shell; the locking pieces are arranged on the end cover at intervals along the circumferential direction of the end cover, the position of each locking piece along the radial direction of the end cover is adjustable, and the locking pieces are suitable for being abutted with the shell to fix the shell; the auxiliary assembly is arranged on one side, away from the pit, of the end cover. The flywheel energy storage system provided by the embodiment of the invention has the advantages of high support rigidity for the shell, higher shell rigidity and convenience in maintenance.

Description

Flywheel energy storage system

Technical Field

The invention relates to the technical field of power storage, in particular to a flywheel energy storage system.

Background

The energy storage flywheel drives a rotating part to rotate at a high speed through the motor, electric energy is temporarily converted into kinetic energy of the rotating part, the electric energy is stored in the form of the kinetic energy of the rotating part, and the rotating part is used for driving an energy storage mode of power generation of a power generator when needed.

Disclosure of Invention

The present invention is based on the discovery and recognition by the inventors of the following facts and problems:

powerful energy storage flywheel produces the moment of verting easily when the operation and orders about the casing of energy storage flywheel along radial swing, and flywheel energy storage system in the correlation technique is not enough to the support rigidity of the radial direction of the casing of energy storage flywheel, and the rigidity of the casing of flywheel energy storage system's in the correlation technique is not enough to lead to the flywheel energy storage system's in the correlation technique stability not high.

The present invention is directed to solving, at least to some extent, one of the technical problems in the related art. Therefore, the embodiment of the invention provides a flywheel energy storage system which has the advantages of high support rigidity for a shell and high shell rigidity.

The flywheel energy storage system comprises a pit; the rotary part is rotatably assembled in the vacuum cavity, the shell is arranged in the pit, and one end of the shell is connected with the bottom end of the pit; the end cover is arranged at the pit opening of the pit, at least part of the end cover is arranged between the other end of the shell and the inner wall of the pit, and the end cover surrounds the outer peripheral side of the shell; the locking pieces are arranged on the end cover and are arranged along the circumferential direction of the end cover at intervals, each locking piece is adjustable in position along the radial direction of the end cover, and the locking pieces are suitable for being abutted with the shell to fix the shell.

The flywheel energy storage system provided by the embodiment of the invention has the advantages of high support rigidity for the shell, higher shell rigidity and convenience in maintenance.

In some embodiments, the pit comprises a recess provided at a bottom end of the pit, the recess extending along an extension direction of the pit, at least part of the housing fitting within the recess.

In some embodiments, the housing includes a first fixing section and a second fixing section, the first fixing section is disposed at one end of the housing, the first fixing section is fixedly assembled to the end cover, the end cover is fixedly assembled to the inner wall of the pit, the second fixing section is disposed at the other end of the housing, and the second fixing section is fixedly assembled to the pit.

In some embodiments, the end cover includes an annular portion and a cylindrical portion, the annular portion extends along the circumferential direction of the pit in a closed manner, at least a part of the annular portion is matched with the inner wall of the pit to be suitable for limiting the position of the end cover, the cylindrical portion extends along the circumferential direction of the first fixing section in a closed manner, an avoiding hole is formed in the inner side of the cylindrical portion, one end of the locking piece is detachably connected with the cylindrical portion, and the other end of the locking piece abuts against the outer circumferential side of the first fixing section.

In some embodiments, the annular portion is provided with a flange, an outer edge of the flange is in fit connection with a part of the inner wall of the pit, and the cylindrical portion is provided on a side of the annular portion facing away from the pit.

In some embodiments, the cylindrical portion is provided with a plurality of guide holes, the locking member includes a guide portion, a fixing portion and a connecting portion, the guide holes extend along the radial direction of the cylindrical portion, the guide portion is guided and assembled in the guide holes and penetrates through the guide holes, the fixing portion is located in the avoiding hole to be suitable for fixing the radial position of the first fixing section, and the connecting portion is detachably connected with the outer wall of the cylindrical portion through a fastener to be suitable for providing clamping force to the fixing portion on the first fixing section.

In some embodiments, the flywheel energy storage system comprises an auxiliary assembly provided on a side of the end cover facing away from the pit.

In some embodiments, the housing includes a first section and a second section, the first and second sections being disposed between the first and second stationary sections, the first section being disposed between the second section and the first stationary section, the rotating member including a rotor portion, the housing including a stator portion, the first section being adapted to mount the stator portion, the stator portion being provided with a wiring, the wiring of the stator portion extending through a set spacing between a plurality of the locking members to the secondary assembly.

In some embodiments, the first section is provided with a plurality of ventilation grooves, the ventilation grooves are arranged in the first section and a plurality of the ventilation grooves are arranged along the circumferential interval of the first section, one end of each ventilation groove is communicated with the pit, and the other end of each ventilation groove is communicated with the avoiding hole so as to be suitable for allowing air in the pit to flow out of the pit and cool the first section.

In some embodiments, the inner wall of the avoiding hole is provided with an annular groove, the annular groove extends along the circumferential direction of the avoiding hole in a closed manner, and the ventilation groove is communicated with the annular groove.

Drawings

FIG. 1 is a schematic diagram of a flywheel energy storage system according to an embodiment of the invention.

Fig. 2 is a top view of a flywheel energy storage system according to an embodiment of the invention.

Fig. 3 isbase:Sub>A schematic cross-sectional view atbase:Sub>A-base:Sub>A in fig. 2.

Fig. 4 is a partially enlarged view at B in fig. 1.

Fig. 5 is a schematic cross-sectional view of a housing and a rotor of a flywheel energy storage system in an embodiment of the invention.

Fig. 6 is a partially enlarged view at C in fig. 3.

Reference numerals:

a pit 1; a recess 11;

a rotating part 2; a rotor portion 21; a rotating shaft 22; a flywheel 23;

a housing 3; a first fixing section 31; a first section 32; a second section 33; a second fixed section 34; a stator portion 35; a wiring 351; a ventilation slot 36;

an end cap 4; the annular portion 41; a flange 411; the cylindrical portion 42; relief holes 43; an annular groove 431;

a locking member 5; a fixed portion 51; the guide portion 52; a connecting portion 53;

an auxiliary component 6; a ventilation assembly 61; a vacuum assembly 62; a control assembly 63.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are illustrative and intended to explain the present invention and should not be construed as limiting the present invention.

A flywheel energy storage system according to an embodiment of the invention is described below with reference to fig. 1 to 6.

The flywheel energy storage system of the embodiment of the invention comprises a pit 1, a rotating part 2, a shell 3, an end cover 4 and a plurality of locking parts 5.

Be equipped with the vacuum cavity in the casing 3, rotate piece 2 and rotationally assemble in the vacuum cavity, casing 3 is located in pit 1, and the one end of casing 3 links to each other with pit 1's bottom.

Specifically, the inside of the casing 3 has a chamber, and the pressure inside the casing 3 is lower than the atmospheric pressure to form a vacuum or a state close to a vacuum, so that a vacuum chamber is formed inside the casing 3, and the viscous resistance of the gas inside the vacuum chamber is low, so that the resistance of the air inside the vacuum chamber to the rotation member 2 is small when the rotation member 2 rotates inside the vacuum chamber.

A radial magnetic bearing group and an axial magnetic bearing group are arranged in the vacuum cavity, the radial magnetic bearing group is used for fixing the radial position of the rotating piece 2 so as to enable the rotating piece 2 to rotate around the rotating shaft 22 extending along the vertical direction, and the axial magnetic bearing group is used for fixing the axial position of the rotating piece 2 so as to enable the rotating piece 2 to be separated from the inner wall of the shell 3, so that the effect of reducing the resistance when the rotating piece 2 rotates is achieved.

The end cover 4 is arranged at the pit opening of the pit 1, at least part of the end cover 4 is arranged between the other end of the shell 3 and the inner wall of the pit 1, and the end cover 4 surrounds the outer periphery side of the shell 3.

Specifically, end cover 4 is the loop configuration, and end cover 4 has outer edge and interior edge, and the outer edge of end cover 4 links to each other with the inner wall of pit 1, and the interior edge of end cover 4 extends along the periphery side closure of some casings 3 to end cover 4 covers between pit 1 inner wall and casing 3 along the radial of pit 1, makes pit 1 keep apart with the external world on the one hand, avoids debris to get into in pit 1, and on the other hand is convenient for open pit 1 through dismantling end cover 4.

A plurality of retaining members 5 are provided on the end cap 4 and are arranged at intervals along the circumferential direction of the end cap 4, each retaining member 5 is adjustable in position along the radial direction of the end cap 4, and the plurality of retaining members 5 are adapted to abut against the housing 3 to fix the housing 3.

Specifically, retaining member 5 is located between end cover 4 and casing 3, and the one end of retaining member 5 links to each other with the interior edge of end cover 4, and the other end of retaining member 5 ends in the periphery side of casing 3, and the hookup location of the interior edge junction of retaining member 5 and end cover 4 is adjustable, makes retaining member 5 end that ends in casing 3 adjustable for the position of end cover 4 to make retaining member 5 can exert clamping force to casing 3 and fix the position of casing 3 for end cover 4, thereby fix casing 3 in pit 1.

The flywheel energy storage system of the embodiment of the invention fixes the shell 3 in the pit 1 by arranging the end cover 4, so that the shell 3 does not need to contain a part for fixing and positioning the shell 3 in the pit 1, thereby simplifying the structure of the shell 3, on one hand, the shell 3 integrally keeps a shape extending around the circumference of the rotating shaft of the rotating part 2 in a closed manner, the radial rigidity of the shell 3 is improved, and the flywheel energy storage system of the embodiment of the invention has the advantage of higher rigidity of the shell 3; on the other hand, the housing 3 does not comprise a component for fixing the upper end of the housing 3 in the pit 1 along the radial direction, so that the weight of the housing 3 is reduced, the housing 3 and the rotating piece 2 are convenient to hoist when the rotating piece 2 is installed or maintained, and the flywheel energy storage system provided by the embodiment of the invention has the advantage of being convenient to maintain.

According to the flywheel energy storage system disclosed by the embodiment of the invention, the upper end of the shell 3 is connected with the inner wall of the pit 1 through the end cover 4 and the locking piece 5, when the shell 3 is subjected to moment for driving the shell 3 to swing along the radial direction of the shell, the component force extending along the radial direction of the shell 3 is transmitted to the inner wall of the pit 1 through the locking piece 5 and the end cover 4, and the inner wall of the pit 1 can bear larger acting force due to higher structural strength of the inner wall of the pit 1, so that the flywheel energy storage system disclosed by the embodiment of the invention has higher supporting rigidity for the shell 3, and the stability of the flywheel energy storage system in the operation is improved.

In some embodiments the pit 1 comprises a recess 11, the recess 11 being provided at a bottom end of the pit 1, the recess 11 extending along an extension of the pit 1, at least part of the housing 3 fitting within the recess 11.

Specifically, the bottom end of the pit 1 is located at the lower end of the pit 1, the recess 11 extends downward from the bottom end of the pit 1, and the geometric center of the recess 11 coincides with the geometric center of the pit 1, that is, the cross-sectional shape of the recess 11 in the horizontal plane is concentrically arranged with the cross-sectional shape of the pit 1 in the horizontal plane, the lower end of the housing 3 is provided with a protruding portion, and the protruding portion at the lower end of the housing 3 is fitted in the recess 11, so that the lower end of the housing 3 is fixedly mounted in the pit 1.

Therefore, the lower end of the shell 3 is positioned in the pit 1 through the recess 11, the peripheral outline of the lower end of the shell 3 is matched with the inner wall of the recess 11, on one hand, the shell 3 fixes the radial position of the lower end of the shell 3 through the recess 11, the lower end of the shell 3 is prevented from moving in the radial direction in the pit 1, when the lower end of the shell 3 is subjected to an acting force for driving the lower end of the shell 3 to move in the radial direction of the shell 3, the peripheral outline of the lower end of the shell 3 is stopped against the inner wall of the recess 11, and the flywheel energy storage system has high supporting rigidity on the shell 3 due to the fact that the inner wall of the recess 11 can bear large acting force.

On the other hand, the housing 3 is positioned in the pit 1 through the recessed hole 11, so that the housing 3 and the rotating part 2 are convenient to install in the pit 1, and the housing 3 and the rotating part 2 are convenient to hoist from the pit 1, so that the flywheel energy storage system provided by the embodiment of the invention has the advantages of convenience in installation and maintenance.

In some embodiments, the housing 3 includes a first fixing section 31 and a second fixing section 34, the first fixing section 31 is disposed at one end of the housing 3, the first fixing section 31 is fixedly mounted on the end cover 4, the end cover 4 is fixedly mounted on the inner wall of the pit 1, the second fixing section 34 is disposed at the other end of the housing 3, and the second fixing section 34 is fixedly mounted on the pit 11.

Specifically, at least one of the diameter size of the first fixing section 31 and the diameter size of the second fixing section 32 is the minimum value of the diameter size of any position of the housing 3, the upper end of the housing 3 forms a first fixing end, the lower end of the housing 3 forms a second fixing section 34, the first fixing section 31 extends upward along the axial direction of the housing 3, the first fixing section 31 is fitted to the inner edge of the end cover 4, the plurality of locking members 5 are stopped at the inner edge of the end cover 4 and the outer peripheral side of the first fixing section 31, the protruding portion at the lower end of the housing 3 forms the second fixing section 34, and the outer wall of the second fixing section 34 is fitted to the inner wall of the recess 11.

Therefore, on one hand, the shell 3 fixes the radial position of the upper end of the shell 3 to the pit 1 through the first fixing section 31, the shell 3 fixes the radial position of the lower end of the shell 3 to the recess 11 through the second fixing section 34, and as the diameters of the first fixing section 31 and the second fixing section 34 are the minimum value of the diameter of the shell 3, when the first fixing section 31 and the second fixing section 34 receive radial supporting force, stress concentration is not easy to occur, so that damage is not easy to occur, and the shell 3 has high rigidity when receiving transverse supporting moment.

On the other hand, the first fixing section 31 is matched with the end cover 4 and clamped and fixed by the plurality of locking pieces 5, the second fixing section 34 is matched with the recess 11, so that the first fixing section 31 is convenient to detach from the end cover 4, and the second fixing section 34 is convenient to detach from the recess 11, and therefore the shell 3 and the rotating part 2 are convenient to hoist when the flywheel energy storage system of the embodiment of the invention is maintained.

In some embodiments, the end cover 4 includes an annular portion 41 and a cylindrical portion 42, the annular portion 41 extends along the circumferential direction of the pit 1 in a closed manner, at least a part of the annular portion 41 is fitted to the inner wall of the pit 1 to be adapted to restrain the position of the end cover 4, the cylindrical portion 42 extends along the circumferential direction of the first fixing section 31 in a closed manner, an avoiding hole 43 is formed on the inner side of the cylindrical portion 42, one end of the locking member 5 is detachably connected to the cylindrical portion 42, and the other end of the locking member 5 abuts against the outer circumferential side of the first fixing section 31.

Specifically, the radial cross section of the pit 1 is circular, the annular portion 41 has a circular ring-shaped structure, that is, the annular portion 41 has a circular outer edge and a circular inner edge, and the outer edge of the annular portion 41 and the inner edge of the annular portion 41 are concentrically arranged, and the cylindrical portion 42 has a cylindrical structure, that is, the cylindrical portion 42 has a cylindrical inner wall surface and a cylindrical outer wall surface, and the inner wall surface of the cylindrical portion 42 and the outer wall surface of the cylindrical portion 42 are coaxially arranged, and the inner edge of the annular portion 41 coincides with the inner wall surface of the cylindrical portion 42, or a part of the inner wall surface of the cylindrical portion 42 forms the inner edge of the annular portion 41.

The annular portion 41 extends in a horizontal plane, the cylindrical portion 42 extends in a vertical direction, and the cylindrical portion 42 extends from an upper surface of the annular portion 41 to an upper side, an outer edge of at least a part of the annular portion 41 is fitted in an inner wall of the pit 1, and an inner wall surface of the cylindrical portion 42 extends closed around an axis of the pit 1 and encloses a relief hole 43.

The first fixing section 31 is located in the avoiding hole 43, part of the locking member 5 extends from the cylindrical portion 42 to the outer peripheral side of the first fixing section 31 along the radial direction of the cylindrical portion 42, the locking member 5 is detachably connected with the cylindrical portion 42, and the position of the connecting part of the locking member 5 and the cylindrical portion 42 is adjustable.

Therefore, the first fixing section 31 is fitted in the avoidance hole 43, and part of the housing 3 is located on the upper side of the end cover 4, so that the overall height of the combination of the housing 3 and the end cover 4 is reduced, and the flywheel energy storage system of the embodiment of the invention has the advantage of compact structure, the cylindrical part 42 increases the thickness dimension of the end cover 4 in the vertical direction, so that the plurality of locking members 5 can be conveniently installed in the end cover 4, the connection positions of the plurality of locking members 5 and the cylindrical part 42 can be adjusted, on one hand, the plurality of locking members 5 can conveniently clamp housings 3 with different sizes, and on the other hand, the clamping acting force of the locking members 5 on the first fixing section 31 can be adjusted by adjusting the connection positions of the locking members 5 and the cylindrical part 42.

In some embodiments the annular portion 41 is provided with a flange 411, the outer edge of the flange 411 being in mating connection with a part of the inner wall of the pit 1, and the cylindrical portion 42 being provided on the side of the annular portion 41 facing away from the pit 1.

Specifically, a flange 411 protrudes downward from the lower end face of the annular portion 41, the flange 411 extends circumferentially and closely along the axis of the pit 1, the flange 411 is of an annular structure, the outer side face of the flange 411 is a cylindrical face, and the nominal size of the diameter of the outer side face of the flange 411 is the same as the nominal size of the upper end of the inner wall of the pit 1, so that the flange 411 can be tightly fitted to the upper edge of the inner wall of the pit 1.

Therefore, the geometric center of the flange 411 is coincident with the geometric center of the end cover 4, when the flange 411 is tightly fitted on the upper edge of the inner wall of the pit 1, the geometric center of the flange 411 is coincident with the geometric center of the pit 1, so that the geometric center of the end cover 4 is coincident with the geometric center of the pit 1, on one hand, the end cover 4 is conveniently and centrally mounted on the pit 1, and the end cover 4 is conveniently dismounted, on the other hand, when the rotating piece 2 rotates in the shell 3 to generate a moment swinging along the radial direction of the pit 1, the outer side surface of the flange 411 is abutted against the inner wall of the pit 1, so that the upper end of the shell 3 is prevented from swinging along the radial direction of the pit 1, and the flywheel energy storage system in the embodiment of the invention has higher supporting rigidity for the shell 3.

In some embodiments, the cylindrical portion 42 is provided with a plurality of guiding holes, the locking member 5 includes a guiding portion 52, a fixing portion 51 and a connecting portion 53, the guiding holes extend along the radial direction of the cylindrical portion 42, the guiding portion 52 is guided to be fitted in the guiding holes and penetrates through the guiding holes, the fixing portion 51 is located in the avoiding hole 43 to be suitable for fixing the radial position of the first fixing section 31, and the connecting portion 53 is detachably connected with the outer wall of the cylindrical portion 42 through a fastener to be suitable for providing the fixing portion 51 with a clamping force on the first fixing section 31.

Specifically, a plurality of guide holes, which penetrate the inner wall surface and the outer wall surface of the cylindrical portion 42 in the radial direction of the cylindrical portion 42, are provided in one-to-one correspondence with the plurality of locking members 5, the plurality of guide holes are arranged at equal intervals in the circumferential direction of the cylindrical portion 42, and the fixing portion 51, the guide portion 52, and the connecting portion 53 are arranged in series in this order along the length direction of the locking members 5.

The guide portion 52 is connected between the fixing portion 51 and the connecting portion 53, the fixing portion 51 is provided on the inner side of the inner wall surface of the cylindrical portion 42, the fixing portion 51 includes fixing grooves extending in the length direction of the first fixing section 31, the connecting portion 53 is provided on the outer side of the outer wall surface of the cylindrical portion 42, and the connecting portion 53 is connected to the cylindrical portion 42 by a fastener.

The extending direction of the guide portion 52 is the same as the extending direction of the guide hole, the guide portion 52 is guided and fitted in the guide hole corresponding thereto, at least a part of the first fixing section 31 is fitted in the fixing groove to fix the first fixing section 31, the fastening member penetrates the connecting portion 53 and is screwed with the cylindrical portion 42, the fastening member extends in the radial direction of the cylindrical portion 42, and the fastening force of the fastening member to the connecting portion 53 and the cylindrical portion 42 extends in the radial direction of the cylindrical portion 42.

Therefore, when the locking member 5 is assembled in the guide hole, the fastening member connects the connecting portion 53 and the cylindrical portion 42, and applies a clamping force to the connecting portion 53, which extends to the guide portion 52 and the fixing portion 51 along the radial direction of the cylindrical portion 42, and the fastening member has high axial strength, so that a larger clamping force of the locking member 5 to the first fixing section 31 can be borne, and the flywheel energy storage system of the embodiment of the invention has higher support rigidity to the housing 3.

In some embodiments, the flywheel energy storage system comprises an auxiliary assembly 6, the auxiliary assembly 6 being provided on a side of the end cover 4 facing away from the pit 1. Specifically, the auxiliary component 6 is connected to the housing 3 to control the rotation speed of the rotation member 2 in the housing 3 so as to convert the electric energy and the kinetic energy of the rotation member 2 into each other, the failure rate of the auxiliary component 6 is high compared to the failure rates of the housing 3 and the rotation member 2, the maintenance frequency of the auxiliary component 6 is high, and the auxiliary component 6 is provided on the upper side of the cover 4 so as to maintain the auxiliary component 6 without opening the cover 4.

Therefore, the flywheel energy storage system provided by the embodiment of the invention has the advantage of convenience in maintenance compared with the technical scheme that the auxiliary components 6 such as the controller are arranged in the pit 1 in the related art by arranging the auxiliary components 6 comprising the electric elements on the upper side of the end cover 4 and not needing to disassemble the end cover 4 to open the pit 1 when the auxiliary components 6 are overhauled or maintained.

In some embodiments, the housing 3 comprises a first section 32 and a second section 33, the first section 32 and the second section 33 being disposed between the first fixed section 31 and the second fixed section 34, the first section 32 being located between the second section 33 and the first fixed section 31, the rotating member 2 comprising the rotor portion 21, the housing 3 comprising the stator portion 35, the first section 32 being adapted to assemble the stator portion 35, the stator portion 35 being provided with a connection 351, the connection 351 of the stator portion 35 extending through a set spacing between the plurality of locking members 5 to the auxiliary assembly 6.

Specifically, the rotating member 2 includes a rotating shaft 22, a rotor portion 21 and a flywheel 23, the rotating shaft 22 is disposed along a vertical direction, an upper end of the rotating shaft 22 is rotatably fitted to the first fixing portion 31, a lower end of the rotating shaft 22 is rotatably fitted to the second fixing portion 34, the rotor portion 21 and the flywheel 23 are disposed on the rotating shaft 22, the rotor portion 21 is disposed on an upper end of the flywheel 23, and the rotor portion 21 is adapted to drive the rotating shaft 22 to rotate when the stator portion 35 is energized, so as to drive the flywheel 23 to rotate, thereby converting electric energy into kinetic energy of the flywheel 23.

The first section 32 is adapted to receive the stator portion 35 and the rotor portion 21 of the rotating member 2, the second section 33 is adapted to receive the flywheel 23 of the rotating member 2, the stator portion 35 is fixedly coupled to the first section 32, the rotor portion 21 is fixedly coupled to the shaft 22 of the rotating member 2, and the rotor portion 21 is rotatably coupled to the rotor portion 21, the stator portion 35 has a plurality of connections 351, one end of the connections 351 is connected to the windings of the stator portion 35, and the other end of the connections 351 is connected to the auxiliary assembly 6.

The plurality of locker 5 are spaced apart along the circumference of the escape hole 43 such that the plurality of locker 5 have a set interval therebetween, and the upper wiring 351 passes through the escape hole 43 from the stator part 35 at a set interval, thereby extending to the upper side of the end cap 4 to be connected to the sub-assembly 6.

Therefore, on the one hand, the first section 32 is located on the upper side of the second section 33, the first section 32 is made to be closer to the avoiding hole 43, the wiring 351 is convenient to extend from the shell 3 to the outer side of the end cover 4, on the other hand, the stator part 35 arranged on the inner side of the first section 32 generates heat during working, and the first section 32 is close to the avoiding hole 43, so that the heat generated by the stator part 35 arranged on the inner side of the first section 32 is convenient to radiate to the upper side of the end cover 4 through the avoiding hole 43.

In some embodiments, the auxiliary assembly 6 comprises a vacuum assembly 62, a ventilation assembly 61 and a control assembly 63, the control assembly 63 being connected to the stator portion 35 to drive the rotation member 2 in rotation or to convert the kinetic energy of the rotation member 2 into electrical energy, the ventilation assembly 61 being adapted to send air into the pit 1 to cool the casing 3, the vacuum assembly 62 being connected to the casing 3 to maintain the vacuum level of the vacuum chamber.

Specifically, the auxiliary assembly 6 is disposed on the upper side of the end cap 4, and the vacuum assembly 62 includes a vacuum pump and a vacuum tube, the vacuum tube is connected between the vacuum pump and the housing 3, and the vacuum tube is communicated with the housing 3, so that the vacuum pump can pump air in the vacuum chamber to the upper side of the end cap 4, and maintain the vacuum degree in the vacuum chamber.

End cover 4 is equipped with a plurality of ventilation holes, and a plurality of ventilation holes are arranged along the periphery side interval of dodging hole 43, and ventilation assembly 61 includes a plurality of fans, a plurality of fans and a plurality of ventilation hole one-to-one, and the fan is suitable for carrying the air of end cover 4 upside to in the pit 1 of end cover 4 below to reduce the temperature of air in pit 1, thereby reduce the temperature of casing 3.

The control unit 63 is electrically connected to the stator part 35 via the connection 351 to control the manner of the connection 351 of the stator part 35 to convert the electrical energy into the kinetic energy of the rotor 2 by the stator part 35 driving the rotor 2 to rotate or to convert the kinetic energy of the rotor 2 into the electrical energy by the relative rotation between the rotor part 21 and the stator part 35.

Therefore, the structure of the auxiliary assembly 6 is complex, the failure rate of the auxiliary assembly 6 in the operation process is higher than that of the shell 3 and the rotating part 2, on one hand, the auxiliary assembly 6 is arranged at the upper end of the end cover 4, so that the auxiliary assembly 6 does not need to open the end cover 4 during maintenance, and the workload of the auxiliary assembly 6 during maintenance is reduced, on the other hand, the stator part 35 is positioned in the pit 1 at the lower side of the end cover 4, and the auxiliary assembly 6 is arranged above the end cover 4, so that the auxiliary assembly 6 is at the optimal working temperature, and the failure rate of the auxiliary assembly 6 during working is reduced.

In some embodiments, the first section 32 is provided with a plurality of ventilation slots 36, the ventilation slots 36 are provided on the first section 32 and the plurality of ventilation slots 36 are arranged at intervals along the circumference of the first section 32, one end of the ventilation slots 36 is communicated with the pit 1, and the other end of the ventilation slots 36 is communicated with the avoidance hole 43, so as to be suitable for cooling the first section 32 in the process that the air in the pit 1 flows out of the pit 1.

Specifically, a plurality of ventilation grooves 36 extend along the axial of first section 32, and the lower extreme of first section 32 is equipped with the air inlet duct, and the air inlet duct extends along the closed circumference of first section 32, and air inlet duct and first section 32, the lower extreme and the annular groove 431 intercommunication of ventilation groove 36 to make the air pass through annular groove 431 and get into ventilation groove 36, the upper end and the hole 43 of dodging of ventilation groove 36 communicate, the air in the ventilation groove 36 of being convenient for is through dodging hole 43 discharge pit 1.

When the ventilation assembly 61 delivers air from the upper side of the end cap 4 into the pit 1, the air pressure in the pit 1 is higher than the atmospheric pressure from the upper side of the end cap 4, so that the air in the pit 1 flows into the relief hole 43 through the ventilation groove 36 and is discharged out of the pit 1, and the heat generated by the stator part 35 is taken out when the air flows through the ventilation groove 36 to cool the stator part 35.

From this, stator portion 35 produces the heat at the during operation, the heat radiates to first section 32, a plurality of ventilation grooves 36 are arranged along the circumference interval of first section 32, when air upwards moves along ventilation grooves 36, the heat in first section 32 radiates to in the ventilation grooves 36 and is taken away by the air, thereby reduce the heat of first section 32, the difference in temperature between first section 32 and the stator portion 35 increases along with the reduction of first section 32 temperature, the heat transfer coefficient between stator portion 35 and the first section 32 increases, in time discharge through first section 32 with the heat that produces in the stator portion 35, thereby the cooling effect to stator portion 35 has been improved.

In some embodiments, the inner wall of the avoiding hole 43 is provided with an annular groove 431, the annular groove 431 extends along the circumferential direction of the avoiding hole 43 in a closed manner, and the ventilation groove 36 is communicated with the annular groove 431.

Specifically, the annular groove 431 is located at the lower end of the avoidance hole 43, the lower end of the annular groove 431 is communicated with the lower end face of the end cover 4, the inner diameter of the lower end of the annular groove 431 is larger than that of the upper end of the annular groove 431, and the plurality of ventilation grooves 36 are communicated with the annular groove 431, that is, the projections of the upper end openings of the plurality of ventilation grooves 36 in the horizontal plane fall within the projection of the annular groove 431 in the horizontal plane.

And the projection of the upper end openings of the plurality of ventilation slots 36 in the horizontal plane is positioned on the outer peripheral side of the projection of the upper end opening of the avoidance hole 43 in the horizontal plane, that is, the projection of the upper end openings of the plurality of ventilation slots 36 in the horizontal plane does not coincide with the projection of the upper end opening of the avoidance hole 43 in the horizontal plane.

Thus, the plurality of ventilation grooves 36 communicate with the escape hole 43 through the annular groove 431, and the upper end openings of the ventilation grooves 36 do not coincide with the upper end opening of the escape hole 43 in projection in the vertical direction, thereby preventing the ventilation grooves 36 from being blocked when foreign matter falls into the escape hole 43.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.

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 at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "above," and "over" a second feature may be directly on or obliquely above the second feature, or simply mean that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the present disclosure, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples" and the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although the above embodiments have been shown and described, it should be understood that they are exemplary and not intended to limit the invention, and that various changes, modifications, substitutions and alterations can be made herein by those skilled in the art without departing from the scope of the invention.

Claims (10)

1. A flywheel energy storage system, comprising:

a pit;

the rotary part is rotatably assembled in the vacuum cavity, the shell is arranged in the pit, and one end of the shell is connected with the bottom end of the pit;

the end cover is arranged at the pit opening of the pit, at least part of the end cover is arranged between the other end of the shell and the inner wall of the pit, and the end cover surrounds the outer peripheral side of the shell;

the locking pieces are arranged on the end cover and are arranged along the circumferential direction of the end cover at intervals, each locking piece is adjustable in position along the radial direction of the end cover, and the locking pieces are suitable for being abutted with the shell to fix the shell.

2. The flywheel energy storage system according to claim 1, wherein the pit comprises a recess provided at a bottom end of the pit, the recess extending along an extension of the pit, and at least part of the housing fits within the recess.

3. The flywheel energy storage system of claim 2, wherein the housing includes a first fixed section and a second fixed section, the first fixed section is disposed at one end of the housing, the first fixed section is fixedly mounted to the end cap, the end cap is fixedly mounted to an inner wall of the pit, the second fixed section is disposed at the other end of the housing, and the second fixed section is fixedly mounted to the pit.

4. The flywheel energy storage system according to claim 3, wherein the end cover includes an annular portion and a cylindrical portion, the annular portion extends along a circumferential direction of the pit in a closed manner, at least a part of the annular portion fits to an inner wall of the pit to be adapted to restrict a position of the end cover, the cylindrical portion extends along a circumferential direction of the first fixing section in a closed manner, an escape hole is formed in an inner side of the cylindrical portion, one end of the locking member is detachably connected to the cylindrical portion, and the other end of the locking member abuts against an outer circumferential side of the first fixing section.

5. The flywheel energy storage system according to claim 4, wherein the annular portion is provided with a flange, an outer edge of the flange is in fit connection with a portion of an inner wall of the pit, and the cylindrical portion is provided on a side of the annular portion facing away from the pit.

6. The flywheel energy storage system according to claim 4, wherein the cylindrical portion is provided with a plurality of guide holes, the locking member includes a guide portion, a fixing portion, and a connecting portion, the guide holes extend in a radial direction of the cylindrical portion, the guide portion is guided to fit in the guide holes and penetrates through the guide holes, the fixing portion is located in the escape hole to be adapted to fix a radial position of the first fixing section, and the connecting portion is detachably connected to an outer wall of the cylindrical portion by a fastening member to be adapted to provide the fixing portion with a clamping force to the first fixing section.

7. The flywheel energy storage system according to any of claim 4, comprising an auxiliary assembly provided on a side of the end cover facing away from the pit.

8. The flywheel energy storage system of claim 7, wherein the housing includes a first section and a second section, the first and second sections being disposed between the first and second stationary sections, the first section being disposed between the second section and the first stationary section, the rotating member including a rotor portion, the housing including a stator portion, the first section being adapted to mount the stator portion, the stator portion being provided with a wire connection, the wire connection of the stator portion extending through a set spacing between a plurality of the retaining members to the auxiliary component.

9. The flywheel energy storage system according to claim 8, wherein the first section is provided with a plurality of ventilation grooves, the ventilation grooves are formed in the first section, the ventilation grooves are arranged along the circumferential direction of the first section at intervals, one ends of the ventilation grooves are communicated with the pit, and the other ends of the ventilation grooves are communicated with the avoidance hole so as to be suitable for cooling the first section in the process that air in the pit flows out of the pit.

10. The flywheel energy storage system according to claim 9, wherein an inner wall of the avoiding hole is provided with an annular groove extending along a circumferential closing direction of the avoiding hole, and the ventilation groove is communicated with the annular groove.

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