CN113241890B - Flywheel falling protection structure and energy storage system - Google Patents

Abstract

The invention relates to the technical field of flywheel energy storage systems, and provides a flywheel drop protection structure and an energy storage system, wherein the flywheel drop protection structure comprises a flywheel, a friction limiting end and a friction limiting end, wherein the lower end surface of the flywheel is convexly provided with a friction limiting end; the anti-collision structure is located below the flywheel, an anti-friction piece is arranged on the anti-collision structure and opposite to the friction limiting end, and the anti-friction piece faces towards the friction limiting end, and the one side of the friction limiting end is a curved surface. According to the flywheel falling protection structure, after the flywheel falls, the friction limiting end arranged on the lower end face of the flywheel is in contact with the friction reducing piece below the flywheel, so that the flywheel is prevented from directly rubbing the shell, and the flywheel and the shell are protected from being damaged; and the contact surface of the antifriction piece and the friction limiting end is a curved surface, the convex part of the curved surface can be contacted with the friction limiting end firstly and generates friction, and the impact on the flywheel can be buffered, so that the flywheel is better protected.

Description

A flywheel drop protection structure and energy storage system

technical field

The invention relates to the technical field of flywheel energy storage systems, in particular to a flywheel drop protection structure and an energy storage system.

Background technique

The flywheel energy storage system is an energy storage device for electromechanical energy conversion. The system uses physical methods to store energy, and realizes the mutual conversion and storage of electrical energy and the mechanical kinetic energy of the high-speed flywheel through the motor/generator reciprocal bidirectional motor.

The flywheel energy storage system in the prior art mainly includes components such as flywheel, bearing, motor/generator, power converter and vacuum chamber. During operation, the motor drives the flywheel to rotate in the vacuum chamber through the bearing. However, in the event of a sudden power failure or shaft system instability, the flywheel may fall. If the flywheel and the shell of the vacuum chamber are directly rubbed at this time, the high relative speed is likely to cause the flywheel and the shell to fall. body damage.

SUMMARY OF THE INVENTION

Therefore, the technical problem to be solved by the present invention is to overcome the sudden power failure or shaft system instability encountered in the flywheel energy storage system in the prior art, which may cause the flywheel to fall, resulting in the flywheel and the shell of the vacuum chamber. Direct friction occurs, and eventually the flywheel and the housing are damaged, thereby providing a flywheel drop protection structure and an energy storage system.

For solving the above-mentioned technical problems, the technical scheme of the present invention is as follows:

A flywheel fall protection structure, comprising: a flywheel, the lower end face of which is protruded with a friction limit end; an anti-collision structure is located below the flywheel, on which is provided with a friction reducing part opposite to the friction limit end , the surface of the friction reducing member facing the friction limiting end is a curved surface.

Further, the friction reducing member is a babbitt alloy.

Further, the anti-collision structure further includes a mounting seat, the mounting seat is provided with an accommodating groove with an opening facing the direction of the friction limit end, and the anti-friction member is placed in the accommodating groove.

Further, the friction limit end extends into the opening of the accommodating groove and has a gap with the side wall of the accommodating groove.

Further, the curved surface is a concave-convex surface with a concave area.

Further, lubricating oil is stored on the concave area of the convex and concave surface.

Further, the friction limit end is in the shape of a circular ring and is coaxially arranged with the flywheel.

Further, the accommodating groove is annular and arranged coaxially with the flywheel.

Further, the anti-friction member is in the shape of an annular shape and is arranged coaxially with the flywheel.

A flywheel energy storage system includes the flywheel drop protection structure described above.

The technical scheme of the present invention has the following advantages:

1. In the flywheel fall protection structure provided by the present invention, when the flywheel falls, the friction limiting end provided on the lower end face of the flywheel contacts with the anti-friction part below the flywheel, preventing the flywheel from directly rubbing with the housing, thereby protecting the flywheel and the housing from being damaged. Damaged; and the contact surface between the anti-friction part and the friction limit end is a curved surface, and the convex part of the curved surface can contact the friction limit end first and generate friction, which can buffer the impact of the flywheel, so as to better protect the flywheel. .

Description of drawings

In order to illustrate the specific embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the specific embodiments or the prior art. Obviously, the accompanying drawings in the following description The drawings are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings without creative efforts.

1 is a schematic diagram of a flywheel drop protection structure in an embodiment of the present invention;

Fig. 2 is the top view of the mounting seat in Fig. 1;

FIG. 3 is an enlarged schematic view of the mounting seat in FIG. 1 .

Description of reference numbers:

1. Flywheel; 2. Friction limit end; 3. Mounting seat;

4. Anti-friction parts; 5. Lubricating oil; 6. Accommodating groove.

Detailed ways

The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the indicated device or element must have a specific orientation or a specific orientation. construction and operation, and therefore should not be construed as limiting the invention. Furthermore, the terms "first", "second", and "third" are used for descriptive purposes only and should not be construed to indicate or imply relative importance.

In the description of the present invention, it should be noted that the terms "installed", "connected" and "connected" should be understood in a broad sense, unless otherwise expressly specified and limited, for example, it may be a fixed connection or a detachable connection Connection, or integral connection; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be internal communication between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific situations.

In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

FIG. 1 is a schematic diagram of a flywheel drop protection structure in an embodiment of the present invention; as shown in FIG. 1 , the present embodiment provides a flywheel drop protection structure, including a flywheel 1, and a friction limit end 2 is protruded on its lower end surface ; Anti-collision structure, located below the flywheel 1, which is provided with a friction-reducing part 4 opposite to the friction limit end 2, the friction-reducing part 4 facing the friction limit end 2 is a curved surface.

Specifically, the friction limit end 2 can be a columnar structure, and a plurality of columns are symmetrically distributed on both sides of the rotating shaft of the flywheel 1 , and the friction limit end 2 can also be a ring structure. The extension direction of the friction limit end 2 is the same as The extension direction of the rotating shaft of the flywheel 1 remains the same. Wherein, the main body of the anti-collision structure may be a plate-shaped structure, or may be a plate-shaped structure with grooves. The anti-friction member 4 can be bonded to the side of the anti-collision structure facing the flywheel 1, and the anti-friction member 4 is arranged in alignment with the lower end surface of the friction limit end 2, so that after the flywheel 1 falls, the anti-friction member 4 and the friction limit end 2 for better contact. The hardness of the friction reducing member 4 may be smaller than that of the friction limiting end 2, so that the friction limiting end 2 can be protected by wearing the friction reducing member 4 during friction. The anti-friction element 4 is provided with a curved surface structure on the side facing the friction limit end 2, and the convex part of the curved surface can first contact the friction limit end and generate friction, which can buffer the impact of the flywheel 1, so as to provide better protection Flywheel 1.

In the flywheel drop protection structure provided by the present invention, when the flywheel 1 falls, the friction limiting end 2 provided on the lower end surface of the flywheel 1 contacts with the anti-friction member 4 under the flywheel 1, so as to prevent the flywheel 1 from directly rubbing with the housing, thereby protecting the flywheel 1 and the housing are not damaged; and the contact surface between the anti-friction element 4 and the friction limit end 2 is a curved surface, and the convex part of the curved surface can contact the friction limit end first and generate friction, which can play a role in the impact of the flywheel 1. Buffering effect, so as to better protect the flywheel 1.

In this embodiment, the friction reducing member 4 is a babbitt alloy. The characteristic of babbitt is that the hard phase particles are evenly distributed on the soft phase matrix. The soft phase matrix makes the babbitt alloy have very good embedding, compliance and seizure resistance, and after running in, the soft matrix is concave, The hard points are convex, so that a small gap is formed between the sliding surfaces, which becomes an oil storage space and a lubricating oil channel, which is conducive to reducing friction. In this way, the anti-friction member 4 made of babbitt alloy has a soft texture, which can reduce the damage of the flywheel 1 .

FIG. 2 is a top view of the mounting seat in FIG. 1 ; as shown in FIG. 2 , in this embodiment, the anti-collision structure further includes a mounting seat 3 , and the mounting seat 3 is provided with an accommodating groove whose opening is arranged in the direction of the friction limit end 2 6. The anti-friction element 4 is placed in the accommodating groove 6 . The mounting seat 3 may be an annular plate, and the rotating shaft of the flywheel 1 passes through the middle through hole of the mounting seat 3 . The outer side of the mounting seat 3 away from the rotating shaft can be glued or welded to the inner wall of the housing. Wherein, when the friction limiting end 2 is annular and is arranged coaxially with the flywheel 1, correspondingly, the accommodating groove 6 is annular and arranged coaxially with the flywheel 1, and correspondingly, the anti-friction member 4 is annular And it is arranged coaxially with the flywheel 1 . The friction limit end 2 can slightly protrude into the opening of the accommodating groove 6, and there is a gap between it and the side wall of the accommodating groove 6, and the height of the friction limit end 2 is not less than the depth of the accommodating groove 6 to prevent the flywheel 1 Other positions except the friction limit end 2 are in contact with the accommodating groove 6 and wear out.

FIG. 3 is an enlarged schematic view of the mounting seat in FIG. 1 . As shown in FIG. 3 , in this embodiment, the curved surface is a concave-convex surface with a concave area. Lubricating oil 5 is stored on the concave area of the convex and concave surface. Among them, the lubricating oil 5 can play a certain lubricating role, reducing the friction between the flywheel 1 and the anti-friction member 4 after falling, thereby reducing damage. Moreover, if the anti-friction member 4 has a smooth surface structure, the contact surface between the friction limit end 2 and the anti-friction member 4 cannot store much lubricating oil 5, but if the anti-friction member 4 has a concave area, it can accommodate More lubricating oil 5 can keep a certain amount of lubricating oil 5 on the contact surface between the friction limit end 2 and the anti-friction member 4, which is beneficial to improve the lubricating effect.

A flywheel energy storage system includes the above-mentioned flywheel drop protection structure.

During use, in the event of a sudden power failure or shaft system instability and other emergencies, when the flywheel 1 falls, the friction limit end 2 on the flywheel 1 falls into the accommodating groove 6, and the friction limit end 2 and the accommodating groove 6 The friction-reducing part 4 is rubbed, and the anti-friction part 4 made of babbitt alloy is soft, on the one hand, it can play a certain buffering effect, and on the other hand, under the action of the lubricating oil 5, the wear of the flywheel 1 can be reduced, Thus, direct friction between the flywheel 1 and the housing is avoided, so as to protect the flywheel 1 .

Obviously, the above-mentioned embodiments are only examples for clear description, and are not intended to limit the implementation manner. For those of ordinary skill in the art, changes or modifications in other different forms can also be made on the basis of the above description. There is no need and cannot be exhaustive of all implementations here. And the obvious changes or changes derived from this are still within the protection scope of the present invention.

Claims (7)

1. a flywheel drop protection structure, is characterized in that, comprises, The flywheel has a protruding friction limit end on its lower end surface; The anti-collision structure is located below the flywheel, and is provided with a friction reducing member facing the friction limiting end, and the surface of the friction reducing member facing the friction limiting end is a curved surface; The anti-collision structure further includes a mounting seat, the mounting seat is provided with an accommodating groove whose opening is arranged in the direction of the friction limit end, and the anti-friction member is placed in the accommodating groove; The friction limit end extends into the opening of the accommodating groove, and has a gap with the side wall of the accommodating groove; the height of the friction limit end is not less than the depth of the accommodating groove; The friction reducing member is a babbitt alloy. 2. The flywheel drop protection structure according to claim 1 is characterized in that, The curved surface is a concave-convex relief surface with a concave area. 3. The flywheel fall protection structure according to claim 2 is characterized in that, Lubricating oil is stored on the concave area of the convex and concave surface. 4. The flywheel fall protection structure according to claim 1 is characterized in that, The friction limit end is annular and is coaxially arranged with the flywheel. 5. The flywheel fall protection structure according to claim 1 is characterized in that, The accommodating groove is annular and coaxial with the flywheel. 6. The flywheel drop protection structure according to claim 1, characterized in that, The friction reducing member is annular and is coaxially arranged with the flywheel. 7 . A flywheel energy storage system, characterized in that it comprises the flywheel drop protection structure according to any one of claims 1 to 6 .

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